update

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "dpf"]
+	path = dpf
+	url = https://github.com/DISTRHO/DPF.git

Makefile

@@ -0,0 +1,45 @@
+#!/usr/bin/make -f
+# Makefile for DISTRHO Plugins #
+# ---------------------------- #
+# Created by falkTX
+#
+# Modified by Wasted Audio
+#
+
+include dpf/Makefile.base.mk
+
+all: libs plugin gen
+
+define MISSING_SUBMODULES_ERROR
+
+Cannot find DGL! Please run "make submodules" to clone the missing submodules, then retry building the plugin.
+
+endef
+
+# --------------------------------------------------------------
+submodules:
+	git submodule update --init --recursive
+
+libs:
+
+plugin: libs
+	$(MAKE) all -C plugin/source
+
+gen: plugins dpf/utils/lv2_ttl_generator
+	@$(CURDIR)/dpf/utils/generate-ttl.sh
+ifeq ($(MACOS),true)
+	@$(CURDIR)/dpf/utils/generate-vst-bundles.sh
+endif
+
+dpf/utils/lv2_ttl_generator:
+	$(MAKE) -C dpf/utils/lv2-ttl-generator
+
+# --------------------------------------------------------------
+
+clean:
+	$(MAKE) clean -C dpf/utils/lv2-ttl-generator
+	$(MAKE) clean -C plugin/source
+
+# --------------------------------------------------------------
+
+.PHONY: plugins

README.md

@@ -0,0 +1,27 @@
+# Distrho Plugin Format
+
+This output is for the Distrho Plugin Format ([DPF](https://github.com/DISTRHO/DPF)), and can be used to build LV2, VST2 and jack standalone versions of your Heavy code.
+
+# Build Instructions
+
+Make sure you have a (recent) DPF in the root of your output directory
+
+```bash
+$ cd <out_dir>
+$ git clone https://github.com/DISTRHO/DPF.git dpf
+```
+
+Then compile the plugins from the source folder:
+
+```bash
+$ make
+```
+
+This will result in an `bin/` folder with all binary assets.
+
+* LV2 - move `bin/<plugin>.lv2/` folder to your local `~/.lv2/` dir
+* VST2 - move `bin/<plugin>-vst.so`, can be placed directly into your `~/.vst/` dir
+
+## Jack
+
+The Jack binary can be executed in place and used to test functionality `./bin/<plugin>`. Currently there is no UI, so this is not recommended. You will have to be running jack in order to use this.

dpf

@@ -0,0 +1 @@
+Subproject commit 86a621bfd86922a49ce593fec2a618a1e0cc6ef3

dpf_midi_thru.pd

@@ -0,0 +1,25 @@
+#N canvas 472 394 409 184 12;
+#X obj 22 19 notein;
+#X obj 22 59 noteout;
+#X obj 98 19 ctlin;
+#X obj 98 59 ctlout;
+#X obj 172 19 pgmin;
+#X obj 172 59 pgmout;
+#X obj 236 19 touchin;
+#X obj 236 59 touchout;
+#X obj 318 19 bendin;
+#X obj 318 69 bendout;
+#X obj 318 44 - 8192;
+#X connect 0 0 1 0;
+#X connect 0 1 1 1;
+#X connect 0 2 1 2;
+#X connect 2 0 3 0;
+#X connect 2 1 3 1;
+#X connect 2 2 3 2;
+#X connect 4 0 5 0;
+#X connect 4 1 5 1;
+#X connect 6 0 7 0;
+#X connect 6 1 7 1;
+#X connect 8 0 10 0;
+#X connect 8 1 9 1;
+#X connect 10 0 9 0;

plugin/README.md

@@ -0,0 +1,27 @@
+# Distrho Plugin Format
+
+This output is for the Distrho Plugin Format ([DPF](https://github.com/DISTRHO/DPF)), and can be used to build LV2, VST2 and jack standalone versions of your Heavy code.
+
+# Build Instructions
+
+Make sure you have a (recent) DPF in the root of your output directory
+
+```bash
+$ cd <out_dir>
+$ git clone https://github.com/DISTRHO/DPF.git dpf
+```
+
+Then compile the plugins from the source folder:
+
+```bash
+$ make
+```
+
+This will result in an `bin/` folder with all binary assets.
+
+* LV2 - move `bin/<plugin>.lv2/` folder to your local `~/.lv2/` dir
+* VST2 - move `bin/<plugin>-vst.so`, can be placed directly into your `~/.vst/` dir
+
+## Jack
+
+The Jack binary can be executed in place and used to test functionality `./bin/<plugin>`. Currently there is no UI, so this is not recommended. You will have to be running jack in order to use this.

plugin/build.json

@@ -0,0 +1 @@
+{"linux": {"x64": {"args": [["-j"]], "projectDir": ["linux"], "binaryDir": ["build", "linux", "x64", "release"]}}}

plugin/source/DistrhoPluginInfo.h

@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) 2021 Enzien Audio, Ltd.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions, and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the phrase "powered by heavy",
+ *    the heavy logo, and a hyperlink to https://enzienaudio.com, all in a visible
+ *    form.
+ * 
+ *   2.1 If the Application is distributed in a store system (for example,
+ *       the Apple "App Store" or "Google Play"), the phrase "powered by heavy"
+ *       shall be included in the app description or the copyright text as well as
+ *       the in the app itself. The heavy logo will shall be visible in the app
+ *       itself as well.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+#pragma once
+
+#define DISTRHO_PLUGIN_NAME            "dpf_midi_thru"
+
+#define DISTRHO_PLUGIN_URI             "http://wasted.audio/lv2/plugin/dpf_midi_thru"
+
+#define DISTRHO_PLUGIN_NUM_INPUTS      0
+#define DISTRHO_PLUGIN_NUM_OUTPUTS     0
+#define DISTRHO_PLUGIN_IS_SYNTH        0
+#define DISTRHO_PLUGIN_HAS_UI          0
+#define DISTRHO_PLUGIN_IS_RT_SAFE      1
+#define DISTRHO_PLUGIN_WANT_PROGRAMS   0
+#define DISTRHO_PLUGIN_WANT_STATE      0
+#define DISTRHO_PLUGIN_WANT_FULL_STATE 0
+#define DISTRHO_PLUGIN_WANT_MIDI_INPUT 1
+#define DISTRHO_PLUGIN_WANT_MIDI_OUTPUT 1
+
+// for level monitoring
+#define DISTRHO_PLUGIN_WANT_DIRECT_ACCESS 0

plugin/source/HeavyContext.cpp

@@ -0,0 +1,264 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HeavyContext.hpp"
+#include "HvTable.h"
+
+void defaultSendHook(HeavyContextInterface *context,
+    const char *sendName, hv_uint32_t sendHash, const HvMessage *msg) {
+  HeavyContext *thisContext = reinterpret_cast<HeavyContext *>(context);
+  const hv_uint32_t numBytes = sizeof(ReceiverMessagePair) + msg_getSize(msg) - sizeof(HvMessage);
+  ReceiverMessagePair *p = reinterpret_cast<ReceiverMessagePair *>(hLp_getWriteBuffer(&thisContext->outQueue, numBytes));
+  if (p != nullptr) {
+    p->receiverHash = sendHash;
+    msg_copyToBuffer(msg, (char *) &p->msg, msg_getSize(msg));
+    hLp_produce(&thisContext->outQueue, numBytes);
+  } else {
+    hv_assert(false &&
+        "::defaultSendHook - The out message queue is full and cannot accept more messages until they "
+        "have been processed. Try increasing the outQueueKb size in the new_with_options() constructor.");
+  }
+}
+
+HeavyContext::HeavyContext(double sampleRate, int poolKb, int inQueueKb, int outQueueKb) :
+    sampleRate(sampleRate) {
+
+  hv_assert(sampleRate > 0.0); // sample rate must be positive
+  hv_assert(poolKb > 0);
+  hv_assert(inQueueKb > 0);
+  hv_assert(outQueueKb >= 0);
+
+  blockStartTimestamp = 0;
+  printHook = nullptr;
+  userData = nullptr;
+
+  // if outQueueKb is positive, then the outQueue is allocated and the default sendhook is set.
+  // Otherwise outQueue and the sendhook are set to NULL.
+  sendHook = (outQueueKb > 0) ? &defaultSendHook : nullptr;
+
+  HV_SPINLOCK_RELEASE(inQueueLock);
+  HV_SPINLOCK_RELEASE(outQueueLock);
+
+  numBytes = sizeof(HeavyContext);
+
+  numBytes += mq_initWithPoolSize(&mq, poolKb);
+  numBytes += hLp_init(&inQueue, inQueueKb * 1024);
+  numBytes += hLp_init(&outQueue, outQueueKb * 1024); // outQueueKb value of 0 sets everything to NULL
+}
+
+HeavyContext::~HeavyContext() {
+  mq_free(&mq);
+  hLp_free(&inQueue);
+  hLp_free(&outQueue);
+}
+
+bool HeavyContext::sendBangToReceiver(hv_uint32_t receiverHash) {
+  HvMessage *m = HV_MESSAGE_ON_STACK(1);
+  msg_initWithBang(m, 0);
+  bool success = sendMessageToReceiver(receiverHash, 0.0, m);
+  return success;
+}
+
+bool HeavyContext::sendFloatToReceiver(hv_uint32_t receiverHash, float f) {
+  HvMessage *m = HV_MESSAGE_ON_STACK(1);
+  msg_initWithFloat(m, 0, f);
+  bool success = sendMessageToReceiver(receiverHash, 0.0, m);
+  return success;
+}
+
+bool HeavyContext::sendSymbolToReceiver(hv_uint32_t receiverHash, const char *s) {
+  hv_assert(s != nullptr);
+  HvMessage *m = HV_MESSAGE_ON_STACK(1);
+  msg_initWithSymbol(m, 0, (char *) s);
+  bool success = sendMessageToReceiver(receiverHash, 0.0, m);
+  return success;
+}
+
+bool HeavyContext::sendMessageToReceiverV(hv_uint32_t receiverHash, double delayMs, const char *format, ...) {
+  hv_assert(delayMs >= 0.0);
+  hv_assert(format != nullptr);
+
+  va_list ap;
+  va_start(ap, format);
+  const int numElem = (int) hv_strlen(format);
+  HvMessage *m = HV_MESSAGE_ON_STACK(numElem);
+  msg_init(m, numElem, blockStartTimestamp + (hv_uint32_t) (hv_max_d(0.0, delayMs)*getSampleRate()/1000.0));
+  for (int i = 0; i < numElem; i++) {
+    switch (format[i]) {
+      case 'b': msg_setBang(m, i); break;
+      case 'f': msg_setFloat(m, i, (float) va_arg(ap, double)); break;
+      case 'h': msg_setHash(m, i, (int) va_arg(ap, int)); break;
+      case 's': msg_setSymbol(m, i, (char *) va_arg(ap, char *)); break;
+      default: break;
+    }
+  }
+  va_end(ap);
+
+  bool success = sendMessageToReceiver(receiverHash, delayMs, m);
+  return success;
+}
+
+bool HeavyContext::sendMessageToReceiver(hv_uint32_t receiverHash, double delayMs, HvMessage *m) {
+  hv_assert(delayMs >= 0.0);
+  hv_assert(m != nullptr);
+
+  const hv_uint32_t timestamp = blockStartTimestamp +
+      (hv_uint32_t) (hv_max_d(0.0, delayMs)*(getSampleRate()/1000.0));
+
+  ReceiverMessagePair *p = nullptr;
+  HV_SPINLOCK_ACQUIRE(inQueueLock);
+  const hv_uint32_t numBytes = sizeof(ReceiverMessagePair) + msg_getSize(m) - sizeof(HvMessage);
+  p = (ReceiverMessagePair *) hLp_getWriteBuffer(&inQueue, numBytes);
+  if (p != nullptr) {
+    p->receiverHash = receiverHash;
+    msg_copyToBuffer(m, (char *) &p->msg, msg_getSize(m));
+    msg_setTimestamp(&p->msg, timestamp);
+    hLp_produce(&inQueue, numBytes);
+  } else {
+    hv_assert(false &&
+        "::sendMessageToReceiver - The input message queue is full and cannot accept more messages until they "
+        "have been processed. Try increasing the inQueueKb size in the new_with_options() constructor.");
+  }
+  HV_SPINLOCK_RELEASE(inQueueLock);
+  return (p != nullptr);
+}
+
+bool HeavyContext::cancelMessage(HvMessage *m, void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  return mq_removeMessage(&mq, m, sendMessage);
+}
+
+HvMessage *HeavyContext::scheduleMessageForObject(const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *),
+    int letIndex) {
+  HvMessage *n = mq_addMessageByTimestamp(&mq, m, letIndex, sendMessage);
+  return n;
+}
+
+float *HeavyContext::getBufferForTable(hv_uint32_t tableHash) {
+  HvTable *t = getTableForHash(tableHash);
+  if (t != nullptr) {
+    return hTable_getBuffer(t);
+  } else return nullptr;
+}
+
+int HeavyContext::getLengthForTable(hv_uint32_t tableHash) {
+  HvTable *t = getTableForHash(tableHash);
+  if (t != nullptr) {
+    return hTable_getLength(t);
+  } else return 0;
+}
+
+bool HeavyContext::setLengthForTable(hv_uint32_t tableHash, hv_uint32_t newSampleLength) {
+  HvTable *t = getTableForHash(tableHash);
+  if (t != nullptr) {
+    hTable_resize(t, newSampleLength);
+    return true;
+  } else return false;
+}
+
+void HeavyContext::lockAcquire() {
+  HV_SPINLOCK_ACQUIRE(inQueueLock);
+}
+
+bool HeavyContext::lockTry() {
+  HV_SPINLOCK_TRY(inQueueLock);
+}
+
+void HeavyContext::lockRelease() {
+  HV_SPINLOCK_RELEASE(inQueueLock);
+}
+
+void HeavyContext::setInputMessageQueueSize(int inQueueKb) {
+  hv_assert(inQueueKb > 0);
+  hLp_free(&inQueue);
+  hLp_init(&inQueue, inQueueKb*1024);
+}
+
+void HeavyContext::setOutputMessageQueueSize(int outQueueKb) {
+  hv_assert(outQueueKb > 0);
+  hLp_free(&outQueue);
+  hLp_init(&outQueue, outQueueKb*1024);
+}
+
+bool HeavyContext::getNextSentMessage(hv_uint32_t *destinationHash, HvMessage *outMsg, hv_size_t msgLengthBytes) {
+  *destinationHash = 0;
+  ReceiverMessagePair *p = nullptr;
+  hv_assert((sendHook == &defaultSendHook) &&
+      "::getNextSentMessage - this function won't do anything if the msg outQueue "
+      "size is 0, or you've overriden the default sendhook.");
+  if (sendHook == &defaultSendHook) {
+    HV_SPINLOCK_ACQUIRE(outQueueLock);
+    if (hLp_hasData(&outQueue)) {
+      hv_uint32_t numBytes = 0;
+      p = reinterpret_cast<ReceiverMessagePair *>(hLp_getReadBuffer(&outQueue, &numBytes));
+      hv_assert((p != nullptr) && "::getNextSentMessage - something bad happened.");
+      hv_assert(numBytes >= sizeof(ReceiverMessagePair));
+      hv_assert((numBytes <= msgLengthBytes) &&
+          "::getNextSentMessage - the sent message is bigger than the message "
+          "passed to handle it.");
+      *destinationHash = p->receiverHash;
+      hv_memcpy(outMsg, &p->msg, numBytes);
+      hLp_consume(&outQueue);
+    }
+    HV_SPINLOCK_RELEASE(outQueueLock);
+  }
+  return (p != nullptr);
+}
+
+hv_uint32_t HeavyContext::getHashForString(const char *str) {
+  return hv_string_to_hash(str);
+}
+
+HvTable *_hv_table_get(HeavyContextInterface *c, hv_uint32_t tableHash) {
+  hv_assert(c != nullptr);
+  return reinterpret_cast<HeavyContext *>(c)->getTableForHash(tableHash);
+}
+
+void _hv_scheduleMessageForReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, HvMessage *m) {
+  hv_assert(c != nullptr);
+  reinterpret_cast<HeavyContext *>(c)->scheduleMessageForReceiver(receiverHash, m);
+}
+
+HvMessage *_hv_scheduleMessageForObject(HeavyContextInterface *c, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *),
+    int letIndex) {
+  hv_assert(c != nullptr);
+  HvMessage *n = reinterpret_cast<HeavyContext *>(c)->scheduleMessageForObject(
+      m, sendMessage, letIndex);
+  return n;
+}
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+HvTable *hv_table_get(HeavyContextInterface *c, hv_uint32_t tableHash) {
+  return _hv_table_get(c, tableHash);
+}
+
+void hv_scheduleMessageForReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, HvMessage *m) {
+  _hv_scheduleMessageForReceiver(c, receiverHash, m);
+}
+
+HvMessage *hv_scheduleMessageForObject(HeavyContextInterface *c, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *),
+    int letIndex) {
+  return _hv_scheduleMessageForObject(c, m, sendMessage, letIndex);
+}
+
+#ifdef __cplusplus
+}
+#endif

plugin/source/HeavyContext.hpp

@@ -0,0 +1,107 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTEXT_H_
+#define _HEAVY_CONTEXT_H_
+
+#include "HeavyContextInterface.hpp"
+#include "HvLightPipe.h"
+#include "HvMessageQueue.h"
+#include "HvMath.h"
+
+struct HvTable;
+
+class HeavyContext : public HeavyContextInterface {
+
+ public:
+  HeavyContext(double sampleRate, int poolKb=10, int inQueueKb=2, int outQueueKb=0);
+  virtual ~HeavyContext();
+
+  int getSize() override { return (int) numBytes; }
+
+  double getSampleRate() override { return sampleRate; }
+
+  hv_uint32_t getCurrentSample() override { return blockStartTimestamp; }
+  float samplesToMilliseconds(hv_uint32_t numSamples) override { return (float) (1000.0*numSamples/sampleRate); }
+  hv_uint32_t millisecondsToSamples(float ms) override { return (hv_uint32_t) (hv_max_f(0.0f,ms)*sampleRate/1000.0); }
+
+  void setUserData(void *x) override { userData = x; }
+  void *getUserData() override { return userData; }
+
+  // hook management
+  void setSendHook(HvSendHook_t *f) override { sendHook = f; }
+  HvSendHook_t *getSendHook() override { return sendHook; }
+
+  void setPrintHook(HvPrintHook_t *f) override { printHook = f; }
+  HvPrintHook_t *getPrintHook() override { return printHook; }
+
+  // message scheduling
+  bool sendMessageToReceiver(hv_uint32_t receiverHash, double delayMs, HvMessage *m) override;
+  bool sendMessageToReceiverV(hv_uint32_t receiverHash, double delayMs, const char *fmt, ...) override;
+  bool sendFloatToReceiver(hv_uint32_t receiverHash, float f) override;
+  bool sendBangToReceiver(hv_uint32_t receiverHash) override;
+  bool sendSymbolToReceiver(hv_uint32_t receiverHash, const char *symbol) override;
+  bool cancelMessage(HvMessage *m, void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) override;
+
+  // table manipulation
+  float *getBufferForTable(hv_uint32_t tableHash) override;
+  int getLengthForTable(hv_uint32_t tableHash) override;
+  bool setLengthForTable(hv_uint32_t tableHash, hv_uint32_t newSampleLength) override;
+
+  // lock control
+  void lockAcquire() override;
+  bool lockTry() override;
+  void lockRelease() override;
+
+  // message queue management
+  void setInputMessageQueueSize(int inQueueKb) override;
+  void setOutputMessageQueueSize(int outQueueKb) override;
+  bool getNextSentMessage(hv_uint32_t *destinationHash, HvMessage *outMsg, hv_size_t msgLength) override;
+
+  // utility functions
+  static hv_uint32_t getHashForString(const char *str);
+
+ protected:
+  virtual HvTable *getTableForHash(hv_uint32_t tableHash) = 0;
+  friend HvTable *_hv_table_get(HeavyContextInterface *, hv_uint32_t);
+
+  virtual void scheduleMessageForReceiver(hv_uint32_t receiverHash, HvMessage *m) = 0;
+  friend void _hv_scheduleMessageForReceiver(HeavyContextInterface *, hv_uint32_t, HvMessage *);
+
+  HvMessage *scheduleMessageForObject(const HvMessage *,
+      void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *),
+      int);
+  friend HvMessage *_hv_scheduleMessageForObject(HeavyContextInterface *, const HvMessage *,
+      void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *),
+      int);
+
+  friend void defaultSendHook(HeavyContextInterface *, const char *, hv_uint32_t, const HvMessage *);
+
+  // object state
+  double sampleRate;
+  hv_uint32_t blockStartTimestamp;
+  hv_size_t numBytes;
+  HvMessageQueue mq;
+  HvSendHook_t *sendHook;
+  HvPrintHook_t *printHook;
+  void *userData;
+  HvLightPipe inQueue;
+  HvLightPipe outQueue;
+  hv_atomic_bool inQueueLock;
+  hv_atomic_bool outQueueLock;
+};
+
+#endif // _HEAVY_CONTEXT_H_

plugin/source/HeavyContextInterface.hpp

@@ -0,0 +1,291 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTEXT_INTERFACE_H_
+#define _HEAVY_CONTEXT_INTERFACE_H_
+
+#include "HvUtils.h"
+
+#ifndef _HEAVY_DECLARATIONS_
+#define _HEAVY_DECLARATIONS_
+
+class HeavyContextInterface;
+struct HvMessage;
+
+typedef enum {
+  HV_PARAM_TYPE_PARAMETER_IN,
+  HV_PARAM_TYPE_PARAMETER_OUT,
+  HV_PARAM_TYPE_EVENT_IN,
+  HV_PARAM_TYPE_EVENT_OUT
+} HvParameterType;
+
+typedef struct HvParameterInfo {
+  const char *name;     // the human readable parameter name
+  hv_uint32_t hash;     // an integer identified used by heavy for this parameter
+  HvParameterType type; // type of this parameter
+  float minVal;         // the minimum value of this parameter
+  float maxVal;         // the maximum value of this parameter
+  float defaultVal;     // the default value of this parameter
+} HvParameterInfo;
+
+typedef void (HvSendHook_t) (HeavyContextInterface *context, const char *sendName, hv_uint32_t sendHash, const HvMessage *msg);
+typedef void (HvPrintHook_t) (HeavyContextInterface *context, const char *printName, const char *str, const HvMessage *msg);
+
+#endif // _HEAVY_DECLARATIONS_
+
+
+
+class HeavyContextInterface {
+
+ public:
+  HeavyContextInterface() {}
+  virtual ~HeavyContextInterface() {};
+
+  /** Returns the read-only user-assigned name of this patch. */
+  virtual const char *getName() = 0;
+
+  /** Returns the number of input channels with which this context has been configured. */
+  virtual int getNumInputChannels() = 0;
+
+  /** Returns the number of output channels with which this context has been configured. */
+  virtual int getNumOutputChannels() = 0;
+
+  /**
+   * Returns the total size in bytes of the context.
+   * This value may change if tables are resized.
+   */
+  virtual int getSize() = 0;
+
+  /** Returns the sample rate with which this context has been configured. */
+  virtual double getSampleRate() = 0;
+
+  /** Returns the current patch time in samples. This value is always exact. */
+  virtual hv_uint32_t getCurrentSample() = 0;
+  virtual float samplesToMilliseconds(hv_uint32_t numSamples) = 0;
+
+  /** Converts milliseconds to samples. Input is limited to non-negative range. */
+  virtual hv_uint32_t millisecondsToSamples(float ms) = 0;
+
+  /** Sets a user-definable value. This value is never manipulated by Heavy. */
+  virtual void setUserData(void *x) = 0;
+
+  /** Returns the user-defined data. */
+  virtual void *getUserData() = 0;
+
+  /**
+   * Set the send hook. The function is called whenever a message is sent to any send object.
+   * Messages returned by this function should NEVER be freed. If the message must persist, call
+   * hv_msg_copy() first.
+   */
+  virtual void setSendHook(HvSendHook_t *f) = 0;
+
+  /** Returns the send hook, or NULL if unset. */
+  virtual HvSendHook_t *getSendHook() = 0;
+
+  /** Set the print hook. The function is called whenever a message is sent to a print object. */
+  virtual void setPrintHook(HvPrintHook_t *f) = 0;
+
+  /** Returns the print hook, or NULL if unset. */
+  virtual HvPrintHook_t *getPrintHook() = 0;
+
+  /**
+   * Processes one block of samples for a patch instance. The buffer format is an array of float channel arrays.
+   * If the context has not input or output channels, the respective argument may be NULL.
+   * The number of samples to to tbe processed should be a multiple of 1, 4, or 8, depending on if
+   * no, SSE or NEON, or AVX optimisation is being used, respectively.
+   * e.g. [[LLLL][RRRR]]
+   *
+   * @return  The number of samples processed.
+   *
+   * This function is NOT thread-safe. It is assumed that only the audio thread will execute this function.
+   */
+  virtual int process(float **inputBuffers, float **outputBuffer, int n) = 0;
+
+  /**
+   * Processes one block of samples for a patch instance. The buffer format is an uninterleaved float array of channels.
+   * If the context has not input or output channels, the respective argument may be NULL.
+   * The number of samples to to tbe processed should be a multiple of 1, 4, or 8, depending on if
+   * no, SSE or NEON, or AVX optimisation is being used, respectively.
+   * e.g. [LLLLRRRR]
+   *
+   * @return  The number of samples processed.
+   *
+   * This function is NOT thread-safe. It is assumed that only the audio thread will execute this function.
+   */
+  virtual int processInline(float *inputBuffers, float *outputBuffer, int n) = 0;
+
+  /**
+   * Processes one block of samples for a patch instance. The buffer format is an interleaved float array of channels.
+   * If the context has not input or output channels, the respective argument may be NULL.
+   * The number of samples to to tbe processed should be a multiple of 1, 4, or 8, depending on if
+   * no, SSE or NEON, or AVX optimisation is being used, respectively.
+   * e.g. [LRLRLRLR]
+   *
+   * @return  The number of samples processed.
+   *
+   * This function is NOT thread-safe. It is assumed that only the audio thread will execute this function.
+   */
+  virtual int processInlineInterleaved(float *inputBuffers, float *outputBuffer, int n) = 0;
+
+  /**
+   * Sends a formatted message to a receiver that can be scheduled for the future.
+   * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+   * This function is thread-safe.
+   *
+   * @return  True if the message was accepted. False if the message could not fit onto
+   *          the message queue to be processed this block.
+   */
+  virtual bool sendMessageToReceiver(hv_uint32_t receiverHash, double delayMs, HvMessage *m) = 0;
+
+  /**
+   * Sends a formatted message to a receiver that can be scheduled for the future.
+   * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+   * This function is thread-safe.
+   *
+   * @return  True if the message was accepted. False if the message could not fit onto
+   *          the message queue to be processed this block.
+   */
+  virtual bool sendMessageToReceiverV(hv_uint32_t receiverHash, double delayMs, const char *fmt, ...) = 0;
+
+  /**
+   * A convenience function to send a float to a receiver to be processed immediately.
+   * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+   * This function is thread-safe.
+   *
+   * @return  True if the message was accepted. False if the message could not fit onto
+   *          the message queue to be processed this block.
+   */
+  virtual bool sendFloatToReceiver(hv_uint32_t receiverHash, float f) = 0;
+
+  /**
+   * A convenience function to send a bang to a receiver to be processed immediately.
+   * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+   * This function is thread-safe.
+   *
+   * @return  True if the message was accepted. False if the message could not fit onto
+   *          the message queue to be processed this block.
+   */
+  virtual bool sendBangToReceiver(hv_uint32_t receiverHash) = 0;
+
+  /**
+   * A convenience function to send a symbol to a receiver to be processed immediately.
+   * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+   * This function is thread-safe.
+   *
+   * @return  True if the message was accepted. False if the message could not fit onto
+   *          the message queue to be processed this block.
+   */
+  virtual bool sendSymbolToReceiver(hv_uint32_t receiverHash, const char *symbol)  = 0;
+
+  /**
+   * Cancels a previously scheduled message.
+   *
+   * @param sendMessage  May be NULL.
+   */
+  virtual bool cancelMessage(HvMessage *m, void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)=nullptr) = 0;
+
+  /**
+   * Returns information about each parameter such as name, hash, and range.
+   * The total number of parameters is always returned.
+   *
+   * @param index  The parameter index.
+   * @param info  A pointer to a HvParameterInfo struct. May be null.
+   *
+   * @return  The total number of parameters.
+   */
+  virtual int getParameterInfo(int index, HvParameterInfo *info) = 0;
+
+  /** Returns a pointer to the raw buffer backing this table. DO NOT free it. */
+  virtual float *getBufferForTable(hv_uint32_t tableHash) = 0;
+
+  /** Returns the length of this table in samples. */
+  virtual int getLengthForTable(hv_uint32_t tableHash) = 0;
+
+  /**
+   * Resizes the table to the given length.
+   *
+   * Existing contents are copied to the new table. Remaining space is cleared
+   * if the table is longer than the original, truncated otherwise.
+   *
+   * @param tableHash  The table identifier.
+   * @param newSampleLength  The new length of the table, in samples.
+   *
+   * @return  False if the table could not be found. True otherwise.
+   */
+  virtual bool setLengthForTable(hv_uint32_t tableHash, hv_uint32_t newSampleLength) = 0;
+
+  /**
+   * Acquire the input message queue lock.
+   *
+   * This function will block until the message lock as been acquired.
+   * Typical applications will not require the use of this function.
+   */
+  virtual void lockAcquire() = 0;
+
+  /**
+   * Try to acquire the input message queue lock.
+   *
+   * If the lock has been acquired, hv_lock_release() must be called to release it.
+   * Typical applications will not require the use of this function.
+   *
+   * @return Returns true if the lock has been acquired, false otherwise.
+   */
+  virtual bool lockTry() = 0;
+
+  /**
+   * Release the input message queue lock.
+   *
+   * Typical applications will not require the use of this function.
+   */
+  virtual void lockRelease() = 0;
+
+  /**
+   * Set the size of the input message queue in kilobytes.
+   *
+   * The buffer is reset and all existing contents are lost on resize.
+   *
+   * @param inQueueKb  Must be positive i.e. at least one.
+   */
+  virtual void setInputMessageQueueSize(int inQueueKb) = 0;
+
+  /**
+   * Set the size of the output message queue in kilobytes.
+   *
+   * The buffer is reset and all existing contents are lost on resize.
+   * Only the default sendhook uses the outgoing message queue. If the default
+   * sendhook is not being used, then this function is not useful.
+   *
+   * @param outQueueKb  Must be postive i.e. at least one.
+   */
+  virtual void setOutputMessageQueueSize(int outQueueKb) = 0;
+
+  /**
+   * Get the next message in the outgoing queue, will also consume the message.
+   * Returns false if there are no messages.
+   *
+   * @param destinationHash  a hash of the name of the receiver the message was sent to.
+   * @param outMsg  message pointer that is filled by the next message contents.
+   * @param msgLengthBytes  max length of outMsg in bytes.
+   *
+   * @return  True if there is a message in the outgoing queue.
+  */
+  virtual bool getNextSentMessage(hv_uint32_t *destinationHash, HvMessage *outMsg, hv_size_t msgLengthBytes) = 0;
+
+  /** Returns a 32-bit hash of any string. Returns 0 if string is NULL. */
+  static hv_uint32_t getHashForString(const char *str);
+};
+
+#endif // _HEAVY_CONTEXT_INTERFACE_H_

plugin/source/HeavyDPF_dpf_midi_thru.cpp

@@ -0,0 +1,339 @@
+/**
+ * Copyright (c) 2021 Enzien Audio, Ltd.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions, and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the phrase "powered by heavy",
+ *    the heavy logo, and a hyperlink to https://enzienaudio.com, all in a visible
+ *    form.
+ * 
+ *   2.1 If the Application is distributed in a store system (for example,
+ *       the Apple "App Store" or "Google Play"), the phrase "powered by heavy"
+ *       shall be included in the app description or the copyright text as well as
+ *       the in the app itself. The heavy logo will shall be visible in the app
+ *       itself as well.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+#include "HeavyDPF_dpf_midi_thru.hpp"
+
+
+#define HV_LV2_NUM_PARAMETERS 0
+
+#define HV_HASH_NOTEIN    0x67e37ca3
+#define HV_HASH_CTLIN     0x41be0f9c
+#define HV_HASH_PGMIN     0x2e1ea03d
+#define HV_HASH_TOUCHIN   0x553925bd
+#define HV_HASH_BENDIN    0x3083f0f7
+#define HV_HASH_MIDIIN    0x149631be
+
+#define HV_HASH_NOTEOUT   0xd1d4ac2
+#define HV_HASH_CTLOUT    0xe5e2a040
+#define HV_HASH_PGMOUT    0x8753e39e
+#define HV_HASH_TOUCHOUT  0x476d4387
+#define HV_HASH_BENDOUT   0xe8458013
+#define HV_HASH_MIDIOUT   0x6511de55
+
+
+START_NAMESPACE_DISTRHO
+
+static void hvSendHookFunc(HeavyContextInterface *c, const char *sendName, uint32_t sendHash, const HvMessage *m)
+{
+  HeavyDPF_dpf_midi_thru* plugin = (HeavyDPF_dpf_midi_thru*)c->getUserData();
+  if (plugin != nullptr)
+  {
+#if DISTRHO_PLUGIN_WANT_MIDI_OUTPUT
+    plugin->handleMidiSend(sendHash, m);
+#endif
+  }
+}
+
+static void hvPrintHookFunc(HeavyContextInterface *c, const char *printLabel, const char *msgString, const HvMessage *m)
+{
+  char buf[64];
+  char* dst = buf;
+  int len = strnlen(printLabel, 48);
+  dst = stpncpy(dst, printLabel, len);
+  dst = stpcpy(dst, " ");
+  dst = stpncpy(dst, msgString, 63-len);
+  printf("> %s \n", buf);
+}
+
+HeavyDPF_dpf_midi_thru::HeavyDPF_dpf_midi_thru()
+ : Plugin(HV_LV2_NUM_PARAMETERS, 0, 0)
+{
+  
+
+  _context = new Heavy_dpf_midi_thru(getSampleRate(), 10, 2, 5);
+  _context->setUserData(this);
+  _context->setSendHook(&hvSendHookFunc);
+  _context->setPrintHook(&hvPrintHookFunc);
+
+  
+}
+
+HeavyDPF_dpf_midi_thru::~HeavyDPF_dpf_midi_thru() {
+  delete _context;
+}
+
+void HeavyDPF_dpf_midi_thru::initParameter(uint32_t index, Parameter& parameter)
+{
+  
+}
+
+// -------------------------------------------------------------------
+// Internal data
+
+float HeavyDPF_dpf_midi_thru::getParameterValue(uint32_t index) const
+{
+  
+  return 0.0f;
+  
+}
+
+void HeavyDPF_dpf_midi_thru::setParameterValue(uint32_t index, float value)
+{
+  
+  // nothing to do
+  
+}
+
+
+// -------------------------------------------------------------------
+// Process
+
+// void HeavyDPF_dpf_midi_thru::activate()
+// {
+
+// }
+
+// void HeavyDPF_dpf_midi_thru::deactivate()
+// {
+
+// }
+
+#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
+void HeavyDPF_dpf_midi_thru::handleMidiInput(uint32_t curEventIndex, const MidiEvent* midiEvents)
+{
+  int status = midiEvents[curEventIndex].data[0];
+  int command = status & 0xF0;
+  int channel = status & 0x0F;
+  int data1   = midiEvents[curEventIndex].data[1];
+  int data2   = midiEvents[curEventIndex].data[2];
+
+  // raw [midiin] messages
+  _context->sendMessageToReceiverV(HV_HASH_MIDIIN, 0, "ff",
+    (float) status,
+    (float) channel);
+
+  _context->sendMessageToReceiverV(HV_HASH_MIDIIN, 0, "ff",
+    (float) data1,
+    (float) channel);
+
+  _context->sendMessageToReceiverV(HV_HASH_MIDIIN, 0, "ff",
+    (float) data2,
+    (float) channel);
+
+  switch (command) {
+    case 0x80: {  // note off
+      _context->sendMessageToReceiverV(HV_HASH_NOTEIN, 0, "fff",
+        (float) data1, // pitch
+        (float) 0, // velocity
+        (float) channel);
+      break;
+    }
+    case 0x90: { // note on
+      _context->sendMessageToReceiverV(HV_HASH_NOTEIN, 0, "fff",
+        (float) data1, // pitch
+        (float) data2, // velocity
+        (float) channel);
+      break;
+    }
+    case 0xB0: { // control change
+      _context->sendMessageToReceiverV(HV_HASH_CTLIN, 0, "fff",
+        (float) data2, // value
+        (float) data1, // cc number
+        (float) channel);
+      break;
+    }
+    case 0xC0: { // program change
+      _context->sendMessageToReceiverV(HV_HASH_PGMIN, 0, "ff",
+        (float) data1,
+        (float) channel);
+      break;
+    }
+    case 0xD0: { // aftertouch
+      _context->sendMessageToReceiverV(HV_HASH_TOUCHIN, 0, "ff",
+        (float) data1,
+        (float) channel);
+      break;
+    }
+    case 0xE0: { // pitch bend
+      // combine 7bit lsb and msb into 32bit int
+      hv_uint32_t value = (((hv_uint32_t) data2) << 7) | ((hv_uint32_t) data1);
+      _context->sendMessageToReceiverV(HV_HASH_BENDIN, 0, "ff",
+        (float) value,
+        (float) channel);
+      break;
+    }
+    default: break;
+  }
+}
+#endif
+
+#if DISTRHO_PLUGIN_WANT_MIDI_OUTPUT
+void HeavyDPF_dpf_midi_thru::handleMidiSend(uint32_t sendHash, const HvMessage *m)
+{
+  MidiEvent midiSendEvent;
+  midiSendEvent.frame = 0;
+  midiSendEvent.dataExt = nullptr;
+
+  switch(sendHash){
+    case HV_HASH_NOTEOUT: // __hv_noteout
+    {
+      uint8_t note = hv_msg_getFloat(m, 0);
+      uint8_t velocity = hv_msg_getFloat(m, 1);
+      uint8_t ch = hv_msg_getFloat(m, 2);
+
+      midiSendEvent.size = 3;
+      if (velocity > 0){
+        midiSendEvent.data[0] = 0x90 | ch; // noteon
+      } else {
+        midiSendEvent.data[0] = 0x80 | ch; // noteoff
+      }
+      midiSendEvent.data[1] = note;
+      midiSendEvent.data[2] = velocity;
+
+      writeMidiEvent(midiSendEvent);
+      break;
+    }
+    case HV_HASH_CTLOUT:
+    {
+      uint8_t value = hv_msg_getFloat(m, 0);
+      uint8_t cc = hv_msg_getFloat(m, 1);
+      uint8_t ch = hv_msg_getFloat(m, 2);
+
+      midiSendEvent.size = 3;
+      midiSendEvent.data[0] = 0xB0 | ch; // send CC
+      midiSendEvent.data[1] = cc;
+      midiSendEvent.data[2] = value;
+
+      writeMidiEvent(midiSendEvent);
+      break;
+    }
+    case HV_HASH_PGMOUT:
+    {
+      uint8_t pgm = hv_msg_getFloat(m, 0);
+      uint8_t ch = hv_msg_getFloat(m, 1);
+
+      midiSendEvent.size = 2;
+      midiSendEvent.data[0] = 0xC0 | ch; // send Program Change
+      midiSendEvent.data[1] = pgm;
+
+      writeMidiEvent(midiSendEvent);
+      break;
+    }
+    case HV_HASH_TOUCHOUT:
+    {
+      uint8_t value = hv_msg_getFloat(m, 0);
+      uint8_t ch = hv_msg_getFloat(m, 1);
+
+      midiSendEvent.size = 2;
+      midiSendEvent.data[0] = 0xD0 | ch; // send Touch
+      midiSendEvent.data[1] = value;
+
+      writeMidiEvent(midiSendEvent);
+      break;
+    }
+    case HV_HASH_BENDOUT:
+    {
+      uint16_t value = hv_msg_getFloat(m, 0);
+      uint8_t lsb  = value & 0x7F;
+      uint8_t msb  = (value >> 7) & 0x7F;
+      uint8_t ch = hv_msg_getFloat(m, 1);
+
+      midiSendEvent.size = 3;
+      midiSendEvent.data[0] = 0xE0 | ch; // send Bend
+      midiSendEvent.data[1] = lsb;
+      midiSendEvent.data[2] = msb;
+
+      writeMidiEvent(midiSendEvent);
+      break;
+    }
+    // case HV_HASH_MIDIOUT: // __hv_midiout
+    // {
+    //   midiSendEvent.size = m->numElements;
+    //   // midiSendEvent.dataExt = (const uint8_t *) m->elem->data;
+
+    //   const char* rawdata = new const char[m->numElements];
+
+    //   for (int i = 0; i < m->numElements; ++i) {
+    //     rawdata[i] = hv_msg_getFloat(m, i);
+    //   }
+    //   midiSendEvent.dataExt = (const uint8_t *) rawdata;
+
+    //   writeMidiEvent(midiSendEvent);
+    // }
+    default:
+      break;
+  }
+}
+#endif
+
+#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
+void HeavyDPF_dpf_midi_thru::run(const float** inputs, float** outputs, uint32_t frames, const MidiEvent* midiEvents, uint32_t midiEventCount)
+{
+  for (uint32_t i=0; i < midiEventCount; ++i)
+  {
+    handleMidiInput(i, midiEvents);
+  }
+#else
+void HeavyDPF_dpf_midi_thru::run(const float** inputs, float** outputs, uint32_t frames)
+{
+#endif
+
+  _context->process((float**)inputs, outputs, frames);
+}
+
+// -------------------------------------------------------------------
+// Callbacks
+
+void HeavyDPF_dpf_midi_thru::sampleRateChanged(double newSampleRate)
+{
+  delete _context;
+
+  _context = new Heavy_dpf_midi_thru(newSampleRate, 10, 2, 5);
+  _context->setUserData(this);
+  _context->setSendHook(&hvSendHookFunc);
+  _context->setPrintHook(&hvPrintHookFunc);
+
+  
+}
+
+
+// -----------------------------------------------------------------------
+/* Plugin entry point, called by DPF to create a new plugin instance. */
+
+Plugin* createPlugin()
+{
+    return new HeavyDPF_dpf_midi_thru();
+}
+
+// -----------------------------------------------------------------------
+
+END_NAMESPACE_DISTRHO

plugin/source/HeavyDPF_dpf_midi_thru.hpp

@@ -0,0 +1,148 @@
+/**
+ * Copyright (c) 2021 Enzien Audio, Ltd.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions, and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the phrase "powered by heavy",
+ *    the heavy logo, and a hyperlink to https://enzienaudio.com, all in a visible
+ *    form.
+ * 
+ *   2.1 If the Application is distributed in a store system (for example,
+ *       the Apple "App Store" or "Google Play"), the phrase "powered by heavy"
+ *       shall be included in the app description or the copyright text as well as
+ *       the in the app itself. The heavy logo will shall be visible in the app
+ *       itself as well.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+#ifndef _HEAVY_LV2_DPF_MIDI_THRU_
+#define _HEAVY_LV2_DPF_MIDI_THRU_
+
+#include "DistrhoPlugin.hpp"
+#include "DistrhoPluginInfo.h"
+#include "Heavy_dpf_midi_thru.hpp"
+
+START_NAMESPACE_DISTRHO
+
+static void hvSendHookFunc(HeavyContextInterface *c, const char *sendName, uint32_t sendHash, const HvMessage *m);
+static void hvPrintHookFunc(HeavyContextInterface *c, const char *printLabel, const char *msgString, const HvMessage *m);
+
+class HeavyDPF_dpf_midi_thru : public Plugin
+{
+public:
+  enum Parameters
+  {
+    
+  };
+
+  HeavyDPF_dpf_midi_thru();
+  ~HeavyDPF_dpf_midi_thru() override;
+
+  void handleMidiInput(uint32_t curEventIndex, const MidiEvent* midiEvents);
+  void handleMidiSend(uint32_t sendHash, const HvMessage *m);
+
+protected:
+  // -------------------------------------------------------------------
+  // Information
+
+  const char* getLabel() const noexcept override
+  {
+    return "dpf_midi_thru";
+  }
+
+
+  const char* getDescription() const override
+  {
+    return "super simple midi thru patch";
+  }
+
+
+  const char* getMaker() const noexcept override
+  {
+
+    return "dreamer";
+
+  }
+
+
+
+  const char* getLicense() const noexcept override
+  {
+
+    return "WTFPL";
+
+  }
+
+  uint32_t getVersion() const noexcept override
+  {
+
+    return d_version(6, 6, 6);
+
+  }
+
+  int64_t getUniqueId() const noexcept override
+  {
+    return int64_t( 0xDB8D6E0D );
+  }
+
+  // -------------------------------------------------------------------
+  // Init
+
+  void initParameter(uint32_t index, Parameter& parameter) override;
+
+  // -------------------------------------------------------------------
+  // Internal data
+
+  float getParameterValue(uint32_t index) const override;
+  void  setParameterValue(uint32_t index, float value) override;
+
+  // -------------------------------------------------------------------
+  // Process
+
+  // void activate() override;
+  // void deactivate() override;
+
+#if DISTRHO_PLUGIN_WANT_MIDI_INPUT
+  void run(const float** inputs, float** outputs, uint32_t frames, const MidiEvent* midiEvents, uint32_t midiEventCount) override;
+#else
+  void run(const float** inputs, float** outputs, uint32_t frames) override;
+#endif
+
+  // -------------------------------------------------------------------
+  // Callbacks
+
+  void sampleRateChanged(double newSampleRate) override;
+
+  // -------------------------------------------------------------------
+
+private:
+  
+
+  // heavy context
+  HeavyContextInterface *_context;
+
+  // HeavyDPF_dpf_midi_thru<float> fdpf_midi_thru;
+
+  DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(HeavyDPF_dpf_midi_thru)
+};
+
+// -----------------------------------------------------------------------
+
+END_NAMESPACE_DISTRHO
+
+#endif // _HEAVY_LV2_DPF_MIDI_THRU_

plugin/source/Heavy_dpf_midi_thru.h

@@ -0,0 +1,80 @@
+/**
+ * Copyright (c) 2021 Enzien Audio, Ltd.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions, and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the phrase "powered by heavy",
+ *    the heavy logo, and a hyperlink to https://enzienaudio.com, all in a visible
+ *    form.
+ * 
+ *   2.1 If the Application is distributed in a store system (for example,
+ *       the Apple "App Store" or "Google Play"), the phrase "powered by heavy"
+ *       shall be included in the app description or the copyright text as well as
+ *       the in the app itself. The heavy logo will shall be visible in the app
+ *       itself as well.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+#ifndef _HEAVY_DPF_MIDI_THRU_H_
+#define _HEAVY_DPF_MIDI_THRU_H_
+
+#include "HvHeavy.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if HV_APPLE
+#pragma mark - Heavy Context
+#endif
+
+
+typedef enum {
+  HV_DPF_MIDI_THRU_PARAM_OUT___HV_BENDOUT = 0xE8458013, // __hv_bendout
+  HV_DPF_MIDI_THRU_PARAM_OUT___HV_CTLOUT = 0xE5E2A040, // __hv_ctlout
+  HV_DPF_MIDI_THRU_PARAM_OUT___HV_NOTEOUT = 0xD1D4AC2, // __hv_noteout
+  HV_DPF_MIDI_THRU_PARAM_OUT___HV_PGMOUT = 0x8753E39E, // __hv_pgmout
+  HV_DPF_MIDI_THRU_PARAM_OUT___HV_TOUCHOUT = 0x476D4387, // __hv_touchout
+} Hv_dpf_midi_thru_ParameterOut;
+
+
+/**
+ * Creates a new patch instance.
+ * Sample rate should be positive and in Hertz, e.g. 44100.0.
+ */
+HeavyContextInterface *hv_dpf_midi_thru_new(double sampleRate);
+
+/**
+ * Creates a new patch instance.
+ * @param sampleRate  Sample rate should be positive (> 0) and in Hertz, e.g. 48000.0.
+ * @param poolKb  Pool size is in kilobytes, and determines the maximum amount of memory
+ *   allocated to messages at any time. By default this is 10 KB.
+ * @param inQueueKb  The size of the input message queue in kilobytes. It determines the
+ *   amount of memory dedicated to holding scheduled messages between calls to
+ *   process(). Default is 2 KB.
+ * @param outQueueKb  The size of the output message queue in kilobytes. It determines the
+ *   amount of memory dedicated to holding scheduled messages to the default sendHook.
+ *   See getNextSentMessage() for info on accessing these messages. Default is 0 KB.
+ */
+HeavyContextInterface *hv_dpf_midi_thru_new_with_options(double sampleRate, int poolKb, int inQueueKb, int outQueueKb);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_DPF_MIDI_THRU_H_

plugin/source/Heavy_dpf_midi_thru.hpp

@@ -0,0 +1,295 @@
+/**
+ * Copyright (c) 2021 Enzien Audio, Ltd.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions, and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form must reproduce the phrase "powered by heavy",
+ *    the heavy logo, and a hyperlink to https://enzienaudio.com, all in a visible
+ *    form.
+ * 
+ *   2.1 If the Application is distributed in a store system (for example,
+ *       the Apple "App Store" or "Google Play"), the phrase "powered by heavy"
+ *       shall be included in the app description or the copyright text as well as
+ *       the in the app itself. The heavy logo will shall be visible in the app
+ *       itself as well.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+
+#ifndef _HEAVY_CONTEXT_DPF_MIDI_THRU_HPP_
+#define _HEAVY_CONTEXT_DPF_MIDI_THRU_HPP_
+
+// object includes
+#include "HeavyContext.hpp"
+#include "HvControlSlice.h"
+#include "HvControlIf.h"
+#include "HvControlPack.h"
+#include "HvControlUnop.h"
+#include "HvControlBinop.h"
+#include "HvControlCast.h"
+#include "HvControlVar.h"
+
+class Heavy_dpf_midi_thru : public HeavyContext {
+
+ public:
+  Heavy_dpf_midi_thru(double sampleRate, int poolKb=10, int inQueueKb=2, int outQueueKb=0);
+  ~Heavy_dpf_midi_thru();
+
+  const char *getName() override { return "dpf_midi_thru"; }
+  int getNumInputChannels() override { return 0; }
+  int getNumOutputChannels() override { return 0; }
+
+  int process(float **inputBuffers, float **outputBuffer, int n) override;
+  int processInline(float *inputBuffers, float *outputBuffer, int n) override;
+  int processInlineInterleaved(float *inputBuffers, float *outputBuffer, int n) override;
+
+  int getParameterInfo(int index, HvParameterInfo *info) override;
+  struct Parameter {
+    
+    struct Out {
+      enum ParameterOut : hv_uint32_t {
+        __HV_BENDOUT = 0xE8458013, // __hv_bendout
+        __HV_CTLOUT = 0xE5E2A040, // __hv_ctlout
+        __HV_NOTEOUT = 0xD1D4AC2, // __hv_noteout
+        __HV_PGMOUT = 0x8753E39E, // __hv_pgmout
+        __HV_TOUCHOUT = 0x476D4387, // __hv_touchout
+      };
+    };
+  };
+
+ private:
+  HvTable *getTableForHash(hv_uint32_t tableHash) override;
+  void scheduleMessageForReceiver(hv_uint32_t receiverHash, HvMessage *m) override;
+
+  // static sendMessage functions
+  static void cSlice_v5VrmQ3B_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_B6GSlADW_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_I2zcuRMh_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSwitchcase_CjUUBW5B_onMessage(HeavyContextInterface *, void *, int letIn, const HvMessage *const, void *);
+  static void cSlice_aQFkp8jd_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSwitchcase_jkq5Pl2Q_onMessage(HeavyContextInterface *, void *, int letIn, const HvMessage *const, void *);
+  static void cSlice_pXycK95c_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_SsXGQ3yt_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_brjdPpjr_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_BFrAK30i_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_QAMfCGlA_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_Acuy1sJf_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_bgKXntSO_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_jhize0RL_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_wMrSZ8Bn_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_XUqD69Wm_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_EAHDuvw9_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_xeEFtXrE_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_blvp4MGy_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_YpXJceX5_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_pv0z1hoC_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_3KNHgmEB_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_qWl4QOMG_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_Mzc2I5WZ_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_rek2TsVl_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_0XGa3vEW_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cPack_zLmFzaLK_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_JfBQFHlI_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_n7hvyxeQ_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_6D7wQ3Az_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_MJKwDHLB_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSend_JTXcgFsy_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cCast_JrReKUYu_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cCast_cjNOB9Vf_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_YtUwtXzp_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_4bqP2oLK_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_1SuRmnmd_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSwitchcase_4wHAp26q_onMessage(HeavyContextInterface *, void *, int letIn, const HvMessage *const, void *);
+  static void cSlice_3EDBlgeL_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSwitchcase_THn7YVaK_onMessage(HeavyContextInterface *, void *, int letIn, const HvMessage *const, void *);
+  static void cSlice_GYdZztDQ_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_NI8bIuKu_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_juM4e16P_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_GkNnhKKB_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_7cTQGOoF_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_WkQHTU3S_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_f62oZqD1_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_p9eKj59r_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_GWW3YUhc_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_crhcV6aG_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_dvnYPvdb_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_4MsIOXwd_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_IP20Rt2h_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_hXRe9EOe_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_PNrClbNB_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_jaJIJvy8_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_dFGMUkFY_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_5dGKgdVQ_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_3sBhN5km_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_nf3YyE0C_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cPack_eHhFaSnZ_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_9eKlV0De_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_t6a5BR8F_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_W5ijg6A8_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_R4oWcxfc_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSend_QvD6c9AQ_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cCast_S6pjFYdg_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cCast_r4TRulVk_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_Rp6eSPzC_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_b66IORBq_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSwitchcase_N3kP8wKC_onMessage(HeavyContextInterface *, void *, int letIn, const HvMessage *const, void *);
+  static void cSlice_BwwzIXZ3_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_uEvC9ivd_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_wy6EQvmX_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_Vhpg6Qog_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_f7N9mpfj_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_ldtCVbeL_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_lqz1DeIQ_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_QXGiNqI0_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_3spmcwwH_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_QjGuPskp_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cPack_OCgqfLze_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_QInLDlgx_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_mLhoNBZ6_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_2TbgR5IC_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSend_Uq11MpZC_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_awhatFOB_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_PtdAXHV5_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSwitchcase_qy900BDR_onMessage(HeavyContextInterface *, void *, int letIn, const HvMessage *const, void *);
+  static void cSlice_0McvQ7qW_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_jyDV1rnb_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_4nK6YYA5_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_78VYx19V_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_TsLbu4r1_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_4jDoWsCi_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_gH5ngjJa_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_t4oPyIE5_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_naImCBzK_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_1qDkeSh2_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cPack_h7p6RmaV_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_OvPqjfDo_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_H56XMtw8_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_0HTJpCDo_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSend_IQu3ImZw_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_HunsaH1W_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSlice_yers4e0I_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSwitchcase_PTbwlEdk_onMessage(HeavyContextInterface *, void *, int letIn, const HvMessage *const, void *);
+  static void cSlice_QUQUSCFN_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_I3zJO9MH_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_875t5doe_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cUnop_8tS95pEp_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_0I956Cig_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_FLv4NU6N_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cIf_FkWw7KyS_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_0JOLxOL6_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_3IEkvJhx_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cMsg_0RuBKNIx_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cPack_bP9Q0y6Y_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cVar_ZJHvrRhO_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_X891Gf8Q_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_m6mSjIoV_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cSend_hOrNPrno_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_oRGZQosL_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cBinop_RC576MtY_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cReceive_vVXNu8wl_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cReceive_WNrV9V4X_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cReceive_kfgVicPa_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cReceive_fyIDjcGp_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cReceive_h3jgrtHh_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+  static void cReceive_m1A6DpHC_sendMessage(HeavyContextInterface *, int, const HvMessage *);
+
+  // objects
+  ControlSlice cSlice_v5VrmQ3B;
+  ControlSlice cSlice_B6GSlADW;
+  ControlSlice cSlice_I2zcuRMh;
+  ControlSlice cSlice_aQFkp8jd;
+  ControlSlice cSlice_pXycK95c;
+  ControlVar cVar_SsXGQ3yt;
+  ControlIf cIf_QAMfCGlA;
+  ControlBinop cBinop_Acuy1sJf;
+  ControlVar cVar_bgKXntSO;
+  ControlIf cIf_XUqD69Wm;
+  ControlBinop cBinop_EAHDuvw9;
+  ControlIf cIf_xeEFtXrE;
+  ControlIf cIf_blvp4MGy;
+  ControlIf cIf_YpXJceX5;
+  ControlIf cIf_pv0z1hoC;
+  ControlBinop cBinop_3KNHgmEB;
+  ControlBinop cBinop_qWl4QOMG;
+  ControlPack cPack_zLmFzaLK;
+  ControlBinop cBinop_JfBQFHlI;
+  ControlBinop cBinop_n7hvyxeQ;
+  ControlVar cVar_6D7wQ3Az;
+  ControlVar cVar_MJKwDHLB;
+  ControlSlice cSlice_YtUwtXzp;
+  ControlSlice cSlice_4bqP2oLK;
+  ControlSlice cSlice_1SuRmnmd;
+  ControlSlice cSlice_3EDBlgeL;
+  ControlSlice cSlice_GYdZztDQ;
+  ControlVar cVar_NI8bIuKu;
+  ControlIf cIf_7cTQGOoF;
+  ControlBinop cBinop_WkQHTU3S;
+  ControlVar cVar_f62oZqD1;
+  ControlIf cIf_crhcV6aG;
+  ControlBinop cBinop_dvnYPvdb;
+  ControlIf cIf_4MsIOXwd;
+  ControlIf cIf_IP20Rt2h;
+  ControlIf cIf_hXRe9EOe;
+  ControlIf cIf_PNrClbNB;
+  ControlBinop cBinop_jaJIJvy8;
+  ControlBinop cBinop_dFGMUkFY;
+  ControlPack cPack_eHhFaSnZ;
+  ControlVar cVar_9eKlV0De;
+  ControlBinop cBinop_t6a5BR8F;
+  ControlBinop cBinop_W5ijg6A8;
+  ControlVar cVar_R4oWcxfc;
+  ControlSlice cSlice_Rp6eSPzC;
+  ControlSlice cSlice_b66IORBq;
+  ControlSlice cSlice_BwwzIXZ3;
+  ControlVar cVar_uEvC9ivd;
+  ControlIf cIf_f7N9mpfj;
+  ControlBinop cBinop_ldtCVbeL;
+  ControlIf cIf_lqz1DeIQ;
+  ControlBinop cBinop_QXGiNqI0;
+  ControlPack cPack_OCgqfLze;
+  ControlVar cVar_QInLDlgx;
+  ControlBinop cBinop_mLhoNBZ6;
+  ControlBinop cBinop_2TbgR5IC;
+  ControlSlice cSlice_awhatFOB;
+  ControlSlice cSlice_PtdAXHV5;
+  ControlSlice cSlice_0McvQ7qW;
+  ControlVar cVar_jyDV1rnb;
+  ControlIf cIf_TsLbu4r1;
+  ControlBinop cBinop_4jDoWsCi;
+  ControlIf cIf_gH5ngjJa;
+  ControlBinop cBinop_t4oPyIE5;
+  ControlPack cPack_h7p6RmaV;
+  ControlVar cVar_OvPqjfDo;
+  ControlBinop cBinop_H56XMtw8;
+  ControlBinop cBinop_0HTJpCDo;
+  ControlSlice cSlice_HunsaH1W;
+  ControlSlice cSlice_yers4e0I;
+  ControlSlice cSlice_QUQUSCFN;
+  ControlVar cVar_I3zJO9MH;
+  ControlIf cIf_0I956Cig;
+  ControlBinop cBinop_FLv4NU6N;
+  ControlIf cIf_FkWw7KyS;
+  ControlBinop cBinop_0JOLxOL6;
+  ControlPack cPack_bP9Q0y6Y;
+  ControlVar cVar_ZJHvrRhO;
+  ControlBinop cBinop_X891Gf8Q;
+  ControlBinop cBinop_m6mSjIoV;
+  ControlBinop cBinop_oRGZQosL;
+  ControlBinop cBinop_RC576MtY;
+};
+
+#endif // _HEAVY_CONTEXT_DPF_MIDI_THRU_HPP_

plugin/source/HvControlBinop.c

@@ -0,0 +1,100 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvControlBinop.h"
+
+hv_size_t cBinop_init(ControlBinop *o, float k) {
+  o->k = k;
+  return 0;
+}
+
+static float cBinop_perform_op(BinopType op, float f, float k) {
+  switch (op) {
+    case HV_BINOP_ADD: return f + k;
+    case HV_BINOP_SUBTRACT: return f - k;
+    case HV_BINOP_MULTIPLY: return f * k;
+    case HV_BINOP_DIVIDE: return (k != 0.0f) ? (f/k) : 0.0f;
+    case HV_BINOP_INT_DIV: {
+      const int ik = (int) k;
+      return (ik != 0) ? (float) (((int) f) / ik) : 0.0f;
+    }
+    case HV_BINOP_MOD_BIPOLAR: {
+      const int ik = (int) k;
+      return (ik != 0) ? (float) (((int) f) % ik) : 0.0f;
+    }
+    case HV_BINOP_MOD_UNIPOLAR: {
+      f = (k == 0.0f) ? 0.0f : (float) ((int) f % (int) k);
+      return (f < 0.0f) ? f + hv_abs_f(k) : f;
+    }
+    case HV_BINOP_BIT_LEFTSHIFT: return (float) (((int) f) << ((int) k));
+    case HV_BINOP_BIT_RIGHTSHIFT: return (float) (((int) f) >> ((int) k));
+    case HV_BINOP_BIT_AND: return (float) ((int) f & (int) k);
+    case HV_BINOP_BIT_XOR: return (float) ((int) f ^ (int) k);
+    case HV_BINOP_BIT_OR: return (float) ((int) f | (int) k);
+    case HV_BINOP_EQ: return (f == k) ? 1.0f : 0.0f;
+    case HV_BINOP_NEQ: return (f != k) ? 1.0f : 0.0f;
+    case HV_BINOP_LOGICAL_AND: return ((f == 0.0f) || (k == 0.0f)) ? 0.0f : 1.0f;
+    case HV_BINOP_LOGICAL_OR: return ((f == 0.0f) && (k == 0.0f)) ? 0.0f : 1.0f;
+    case HV_BINOP_LESS_THAN: return (f < k) ? 1.0f : 0.0f;
+    case HV_BINOP_LESS_THAN_EQL: return (f <= k) ? 1.0f : 0.0f;
+    case HV_BINOP_GREATER_THAN: return (f > k) ? 1.0f : 0.0f;
+    case HV_BINOP_GREATER_THAN_EQL: return (f >= k) ? 1.0f : 0.0f;
+    case HV_BINOP_MAX: return hv_max_f(f, k);
+    case HV_BINOP_MIN: return hv_min_f(f, k);
+    case HV_BINOP_POW: return (f > 0.0f) ? hv_pow_f(f, k) : 0.0f;
+    case HV_BINOP_ATAN2: return ((f == 0.0f) && (k == 0.0f)) ? 0.0f : hv_atan2_f(f, k);
+    default: return 0.0f;
+  }
+}
+
+void cBinop_onMessage(HeavyContextInterface *_c, ControlBinop *o, BinopType op, int letIn,
+    const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  switch (letIn) {
+    case 0: {
+      if (msg_isFloat(m, 0)) {
+        // Note(joe): supporting Pd's ability to perform operations of packs
+        // of floats is likely to not be supported in the future.
+        if (msg_isFloat(m, 1)) o->k = msg_getFloat(m, 1);
+        HvMessage *n = HV_MESSAGE_ON_STACK(1);
+        float f = cBinop_perform_op(op, msg_getFloat(m, 0), o->k);
+        msg_initWithFloat(n, msg_getTimestamp(m), f);
+        sendMessage(_c, 0, n);
+      }
+      break;
+    }
+    case 1: {
+      if (msg_isFloat(m, 0)) {
+        o->k = msg_getFloat(m, 0);
+      }
+      break;
+    }
+    default: break;
+  }
+}
+
+void cBinop_k_onMessage(HeavyContextInterface *_c, void *o, BinopType op, float k,
+    int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  if (msg_isFloat(m, 0)) {
+    // NOTE(mhroth): Heavy does not support sending bangs to binop objects to return the previous output
+    float f = (msg_isFloat(m, 1)) ? msg_getFloat(m, 1) : k;
+    HvMessage *n = HV_MESSAGE_ON_STACK(1);
+    f = cBinop_perform_op(op, msg_getFloat(m, 0), f);
+    msg_initWithFloat(n, msg_getTimestamp(m), f);
+    sendMessage(_c, 0, n);
+  }
+}

plugin/source/HvControlBinop.h

@@ -0,0 +1,71 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTROL_BINOP_H_
+#define _HEAVY_CONTROL_BINOP_H_
+
+#include "HvHeavyInternal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum BinopType {
+  HV_BINOP_ADD,
+  HV_BINOP_SUBTRACT,
+  HV_BINOP_MULTIPLY,
+  HV_BINOP_DIVIDE,
+  HV_BINOP_INT_DIV,
+  HV_BINOP_MOD_BIPOLAR,
+  HV_BINOP_MOD_UNIPOLAR,
+  HV_BINOP_BIT_LEFTSHIFT,
+  HV_BINOP_BIT_RIGHTSHIFT,
+  HV_BINOP_BIT_AND,
+  HV_BINOP_BIT_XOR,
+  HV_BINOP_BIT_OR,
+  HV_BINOP_EQ,
+  HV_BINOP_NEQ,
+  HV_BINOP_LOGICAL_AND,
+  HV_BINOP_LOGICAL_OR,
+  HV_BINOP_LESS_THAN,
+  HV_BINOP_LESS_THAN_EQL,
+  HV_BINOP_GREATER_THAN,
+  HV_BINOP_GREATER_THAN_EQL,
+  HV_BINOP_MAX,
+  HV_BINOP_MIN,
+  HV_BINOP_POW,
+  HV_BINOP_ATAN2
+} BinopType;
+
+typedef struct ControlBinop {
+  float k;
+} ControlBinop;
+
+hv_size_t cBinop_init(ControlBinop *o, float k);
+
+void cBinop_onMessage(HeavyContextInterface *_c, ControlBinop *o, BinopType op, int letIn,
+    const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+void cBinop_k_onMessage(HeavyContextInterface *_c, void *o, BinopType op, float k,
+    int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_CONTROL_BINOP_H_

plugin/source/HvControlCast.c

@@ -0,0 +1,60 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvControlCast.h"
+
+void cCast_onMessage(HeavyContextInterface *_c, CastType castType, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  switch (castType) {
+    case HV_CAST_BANG: {
+      HvMessage *n = HV_MESSAGE_ON_STACK(1);
+      msg_initWithBang(n, msg_getTimestamp(m));
+      sendMessage(_c, 0, n);
+      break;
+    }
+    case HV_CAST_FLOAT: {
+      if (msg_isFloat(m, 0)) {
+        HvMessage *n = HV_MESSAGE_ON_STACK(1);
+        msg_initWithFloat(n, msg_getTimestamp(m), msg_getFloat(m, 0));
+        sendMessage(_c, 0, n);
+      }
+      break;
+    }
+    case HV_CAST_SYMBOL: {
+      switch (msg_getType(m, 0)) {
+        case HV_MSG_BANG: {
+          HvMessage *n = HV_MESSAGE_ON_STACK(1);
+          msg_initWithSymbol(n, msg_getTimestamp(m), "bang");
+          sendMessage(_c, 0, n);
+          break;
+        }
+        case HV_MSG_FLOAT: {
+          HvMessage *n = HV_MESSAGE_ON_STACK(1);
+          msg_initWithSymbol(n, msg_getTimestamp(m), "float");
+          sendMessage(_c, 0, n);
+          break;
+        }
+        case HV_MSG_SYMBOL: {
+          sendMessage(_c, 0, m);
+          break;
+        }
+        default: return;
+      }
+      break;
+    }
+    default: return;
+  }
+}

plugin/source/HvControlCast.h

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTROL_CAST_H_
+#define _HEAVY_CONTROL_CAST_H_
+
+#include "HvHeavyInternal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum CastType {
+  HV_CAST_BANG,
+  HV_CAST_FLOAT,
+  HV_CAST_SYMBOL
+} CastType;
+
+void cCast_onMessage(HeavyContextInterface *_c, CastType castType, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_CONTROL_CAST_H_

plugin/source/HvControlIf.c

@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvControlIf.h"
+
+hv_size_t cIf_init(ControlIf *o, bool k) {
+  o->k = k;
+  return 0;
+}
+
+void cIf_onMessage(HeavyContextInterface *_c, ControlIf *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  switch (letIn) {
+    case 0: {
+      // a "true" if will send the message from the right outlet
+      // a "false" if gets sent out of the left outlet
+      sendMessage(_c, o->k ? 1 : 0, m);
+      break;
+    }
+    case 1: {
+      if (msg_isFloat(m, 0)) {
+        o->k = (msg_getFloat(m, 0) != 0.0f);
+      }
+      break;
+    }
+    default: return;
+  }
+}

plugin/source/HvControlIf.h

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTROL_IF_H_
+#define _HEAVY_CONTROL_IF_H_
+
+#include "HvHeavyInternal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ControlIf {
+  bool k;
+} ControlIf;
+
+hv_size_t cIf_init(ControlIf *o, bool k);
+
+void cIf_onMessage(HeavyContextInterface *_c, ControlIf *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_CONTROL_IF_H_

plugin/source/HvControlPack.c

@@ -0,0 +1,67 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvControlPack.h"
+
+hv_size_t cPack_init(ControlPack *o, int nargs, ...) {
+  hv_size_t numBytes = msg_getCoreSize(nargs);
+  o->msg = (HvMessage *) hv_malloc(numBytes);
+  hv_assert(o->msg != NULL);
+  msg_init(o->msg, nargs, 0);
+
+  // variable arguments are used as float initialisers for the pack elements
+  va_list ap;
+  va_start(ap, nargs);
+  for (int i = 0; i < nargs; ++i) {
+    msg_setFloat(o->msg, i, (float) va_arg(ap, double));
+  }
+  va_end(ap);
+  return numBytes;
+}
+
+void cPack_free(ControlPack *o) {
+  hv_free(o->msg);
+}
+
+void cPack_onMessage(HeavyContextInterface *_c, ControlPack *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  // ensure let index is less than number elements in internal msg
+  int numElements = msg_getNumElements(o->msg);
+  switch (letIn) {
+    case 0: { // first inlet stores all values of input msg and triggers an output
+      for (int i = hv_min_i(numElements, msg_getNumElements(m))-1; i >= 0; --i) {
+        switch (msg_getType(m, i)) {
+          case HV_MSG_FLOAT: msg_setFloat(o->msg, i, msg_getFloat(m, i)); break;
+          case HV_MSG_SYMBOL:
+          case HV_MSG_HASH: msg_setHash(o->msg, i, msg_getHash(m, i)); break;
+          default: break;
+        }
+      }
+      msg_setTimestamp(o->msg, msg_getTimestamp(m));
+      sendMessage(_c, 0, o->msg);
+      break;
+    }
+    default: { // rest of inlets just store values
+      switch (msg_getType(m, 0)) {
+        case HV_MSG_FLOAT: msg_setFloat(o->msg, letIn, msg_getFloat(m, 0)); break;
+        case HV_MSG_SYMBOL:
+        case HV_MSG_HASH: msg_setHash(o->msg, letIn, msg_getHash(m, 0)); break;
+        default: break;
+      }
+      break;
+    }
+  }
+}

plugin/source/HvControlPack.h

@@ -0,0 +1,41 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTROL_PACK_H_
+#define _HEAVY_CONTROL_PACK_H_
+
+#include "HvHeavyInternal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ControlPack {
+  HvMessage *msg;
+} ControlPack;
+
+hv_size_t cPack_init(ControlPack *o, int nargs, ...);
+
+void cPack_free(ControlPack *o);
+
+void cPack_onMessage(HeavyContextInterface *_c, ControlPack *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_CONTROL_PACK_H_

plugin/source/HvControlSlice.c

@@ -0,0 +1,62 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvControlSlice.h"
+
+hv_size_t cSlice_init(ControlSlice *o, int i, int n) {
+  o->i = i;
+  o->n = n;
+  return 0;
+}
+
+void cSlice_onMessage(HeavyContextInterface *_c, ControlSlice *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  switch (letIn) {
+    case 0: {
+      // if the start point is greater than the number of elements in the source message, do nothing
+      if (o->i < msg_getNumElements(m)) {
+        int x = msg_getNumElements(m) - o->i; // number of elements in the new message
+        if (o->n > 0) x = hv_min_i(x, o->n);
+        HvMessage *n = HV_MESSAGE_ON_STACK(x);
+        msg_init(n, x, msg_getTimestamp(m));
+        hv_memcpy(&n->elem, &m->elem+o->i, x*sizeof(Element));
+        sendMessage(_c, 0, n);
+      } else {
+        // if nothing can be sliced, send a bang out of the right outlet
+        HvMessage *n = HV_MESSAGE_ON_STACK(1);
+        msg_initWithBang(n, msg_getTimestamp(m));
+        sendMessage(_c, 1, n);
+      }
+      break;
+    }
+    case 1: {
+      if (msg_isFloat(m,0)) {
+        o->i = (int) msg_getFloat(m,0);
+        if (msg_isFloat(m,1)) {
+          o->n = (int) msg_getFloat(m,1);
+        }
+      }
+      break;
+    }
+    case 2: {
+      if (msg_isFloat(m,0)) {
+        o->n = (int) msg_getFloat(m,0);
+      }
+      break;
+    }
+    default: break;
+  }
+}

plugin/source/HvControlSlice.h

@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTROL_SLICE_H_
+#define _HEAVY_CONTROL_SLICE_H_
+
+#include "HvHeavyInternal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ControlSlice {
+  int i; // start index
+  int n; // length of slice
+} ControlSlice;
+
+hv_size_t cSlice_init(ControlSlice *o, int i, int n);
+
+void cSlice_onMessage(HeavyContextInterface *_c, ControlSlice *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_CONTROL_SLICE_H_

plugin/source/HvControlUnop.c

@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvControlUnop.h"
+
+void cUnop_onMessage(HeavyContextInterface *_c, UnopType op, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  if (msg_isFloat(m, 0)) {
+    float f = msg_getFloat(m, 0);
+    switch (op) {
+      case HV_UNOP_SIN: f = hv_sin_f(f); break;
+      case HV_UNOP_SINH: f = hv_sinh_f(f); break;
+      case HV_UNOP_COS: f = hv_cos_f(f); break;
+      case HV_UNOP_COSH: f = hv_cosh_f(f); break;
+      case HV_UNOP_TAN: f = hv_tan_f(f); break;
+      case HV_UNOP_TANH: f = hv_tanh_f(f); break;
+      case HV_UNOP_ASIN: f = hv_asin_f(f); break;
+      case HV_UNOP_ASINH: f = hv_asinh_f(f); break;
+      case HV_UNOP_ACOS: f = hv_acos_f(f); break;
+      case HV_UNOP_ACOSH: f = hv_acosh_f(f); break;
+      case HV_UNOP_ATAN: f = hv_atan_f(f); break;
+      case HV_UNOP_ATANH: f = hv_atanh_f(f); break;
+      case HV_UNOP_EXP: f = hv_exp_f(f); break;
+      case HV_UNOP_ABS: f = hv_abs_f(f); break;
+      case HV_UNOP_SQRT: f = (f > 0.0f) ? hv_sqrt_f(f) : 0.0f; break;
+      case HV_UNOP_LOG: f = (f > 0.0f) ? hv_log_f(f) : 0.0f; break;
+      case HV_UNOP_LOG2: f = (f > 0.0f) ? (1.442695040888963f*hv_log_f(f)) : 0.0f; break;
+      case HV_UNOP_LOG10: f = (f > 0.0f) ? (0.434294481903252f*hv_log_f(f)) : 0.0f; break;
+      case HV_UNOP_CEIL: f = hv_ceil_f(f); break;
+      case HV_UNOP_FLOOR: f = hv_floor_f(f); break;
+      case HV_UNOP_ROUND: f = hv_round_f(f); break;
+      default: return;
+    }
+    HvMessage *n = HV_MESSAGE_ON_STACK(1);
+    msg_initWithFloat(n, m->timestamp, f);
+    sendMessage(_c, 0, n);
+  }
+}

plugin/source/HvControlUnop.h

@@ -0,0 +1,57 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTROL_UNOP_H_
+#define _HEAVY_CONTROL_UNOP_H_
+
+#include "HvHeavyInternal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum UnopType {
+  HV_UNOP_ASIN,
+  HV_UNOP_ASINH,
+  HV_UNOP_ACOS,
+  HV_UNOP_ACOSH,
+  HV_UNOP_ATAN,
+  HV_UNOP_ATANH,
+  HV_UNOP_SIN,
+  HV_UNOP_SINH,
+  HV_UNOP_COS,
+  HV_UNOP_COSH,
+  HV_UNOP_TAN,
+  HV_UNOP_TANH,
+  HV_UNOP_EXP,
+  HV_UNOP_ABS,
+  HV_UNOP_SQRT,
+  HV_UNOP_LOG,
+  HV_UNOP_LOG2,
+  HV_UNOP_LOG10,
+  HV_UNOP_CEIL,
+  HV_UNOP_FLOOR,
+  HV_UNOP_ROUND
+} UnopType;
+
+void cUnop_onMessage(HeavyContextInterface *_c, UnopType op, const struct HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const struct HvMessage *));
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_CONTROL_UNOP_H_

plugin/source/HvControlVar.c

@@ -0,0 +1,83 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvControlVar.h"
+
+hv_size_t cVar_init_f(ControlVar *o, float k) {
+  o->e.type = HV_MSG_FLOAT;
+  o->e.data.f = k;
+  return 0;
+}
+
+hv_size_t cVar_init_s(ControlVar *o, const char *s) {
+  o->e.type = HV_MSG_HASH;
+  o->e.data.h = hv_string_to_hash(s);
+  return 0;
+}
+
+void cVar_free(ControlVar *o) {
+  // nothing to do
+}
+
+void cVar_onMessage(HeavyContextInterface *_c, ControlVar *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  switch (letIn) {
+    case 0: {
+      switch (msg_getType(m,0)) {
+        case HV_MSG_BANG: {
+          HvMessage *n = HV_MESSAGE_ON_STACK(1);
+          if (o->e.type == HV_MSG_FLOAT) msg_initWithFloat(n, msg_getTimestamp(m), o->e.data.f);
+          else if (o->e.type == HV_MSG_HASH) msg_initWithHash(n, msg_getTimestamp(m), o->e.data.h);
+          else return;
+          sendMessage(_c, 0, n);
+          break;
+        }
+        case HV_MSG_FLOAT: {
+          o->e.type = HV_MSG_FLOAT;
+          o->e.data.f = msg_getFloat(m,0);
+          sendMessage(_c, 0, m);
+          break;
+        }
+        case HV_MSG_SYMBOL:
+        case HV_MSG_HASH: {
+          o->e.type = HV_MSG_HASH;
+          o->e.data.h = msg_getHash(m,0);
+          sendMessage(_c, 0, m);
+          break;
+        }
+        default: return;
+      }
+      break;
+    }
+    case 1: {
+      switch (msg_getType(m,0)) {
+        case HV_MSG_FLOAT: {
+          o->e.type = HV_MSG_FLOAT;
+          o->e.data.f = msg_getFloat(m,0);
+          break;
+        }
+        case HV_MSG_SYMBOL:
+        case HV_MSG_HASH: {
+          o->e.type = HV_MSG_HASH;
+          o->e.data.h = msg_getHash(m,0);
+          break;
+        }
+        default: break;
+      }
+    }
+    default: return;
+  }
+}

plugin/source/HvControlVar.h

@@ -0,0 +1,43 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_CONTROL_VAR_H_
+#define _HEAVY_CONTROL_VAR_H_
+
+#include "HvHeavyInternal.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ControlVar {
+  Element e; // type is only every HV_MSG_FLOAT or HV_MSG_HASH
+} ControlVar;
+
+hv_size_t cVar_init_f(ControlVar *o, float k);
+
+hv_size_t cVar_init_s(ControlVar *o, const char *s);
+
+void cVar_free(ControlVar *o);
+
+void cVar_onMessage(HeavyContextInterface *_c, ControlVar *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_CONTROL_VAR_H_

plugin/source/HvHeavy.cpp

@@ -0,0 +1,318 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HeavyContext.hpp"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if !HV_WIN
+#pragma mark - Heavy Table
+#endif
+
+HV_EXPORT bool hv_table_setLength(HeavyContextInterface *c, hv_uint32_t tableHash, hv_uint32_t newSampleLength) {
+  hv_assert(c != nullptr);
+  return c->setLengthForTable(tableHash, newSampleLength);
+}
+
+HV_EXPORT float *hv_table_getBuffer(HeavyContextInterface *c, hv_uint32_t tableHash) {
+  hv_assert(c != nullptr);
+  return c->getBufferForTable(tableHash);
+}
+
+HV_EXPORT hv_uint32_t hv_table_getLength(HeavyContextInterface *c, hv_uint32_t tableHash) {
+  hv_assert(c != nullptr);
+  return c->getLengthForTable(tableHash);
+}
+
+
+
+#if !HV_WIN
+#pragma mark - Heavy Message
+#endif
+
+HV_EXPORT hv_size_t hv_msg_getByteSize(hv_uint32_t numElements) {
+  return msg_getCoreSize(numElements);
+}
+
+HV_EXPORT void hv_msg_init(HvMessage *m, int numElements, hv_uint32_t timestamp) {
+  msg_init(m, numElements, timestamp);
+}
+
+HV_EXPORT hv_size_t hv_msg_getNumElements(const HvMessage *m) {
+  return msg_getNumElements(m);
+}
+
+HV_EXPORT hv_uint32_t hv_msg_getTimestamp(const HvMessage *m) {
+  return msg_getTimestamp(m);
+}
+
+HV_EXPORT void hv_msg_setTimestamp(HvMessage *m, hv_uint32_t timestamp) {
+  msg_setTimestamp(m, timestamp);
+}
+
+HV_EXPORT bool hv_msg_isBang(const HvMessage *const m, int i) {
+  return msg_isBang(m,i);
+}
+
+HV_EXPORT void hv_msg_setBang(HvMessage *m, int i) {
+  msg_setBang(m,i);
+}
+
+HV_EXPORT bool hv_msg_isFloat(const HvMessage *const m, int i) {
+  return msg_isFloat(m, i);
+}
+
+HV_EXPORT float hv_msg_getFloat(const HvMessage *const m, int i) {
+  return msg_getFloat(m,i);
+}
+
+HV_EXPORT void hv_msg_setFloat(HvMessage *m, int i, float f) {
+  msg_setFloat(m,i,f);
+}
+
+HV_EXPORT bool hv_msg_isSymbol(const HvMessage *const m, int i) {
+  return msg_isSymbol(m,i);
+}
+
+HV_EXPORT const char *hv_msg_getSymbol(const HvMessage *const m, int i) {
+  return msg_getSymbol(m,i);
+}
+
+HV_EXPORT void hv_msg_setSymbol(HvMessage *m, int i, const char *s) {
+  msg_setSymbol(m,i,s);
+}
+
+HV_EXPORT bool hv_msg_isHash(const HvMessage *const m, int i) {
+  return msg_isHash(m, i);
+}
+
+HV_EXPORT hv_uint32_t hv_msg_getHash(const HvMessage *const m, int i) {
+  return msg_getHash(m, i);
+}
+
+HV_EXPORT bool hv_msg_hasFormat(const HvMessage *const m, const char *fmt) {
+  return msg_hasFormat(m, fmt);
+}
+
+HV_EXPORT char *hv_msg_toString(const HvMessage *const m) {
+  return msg_toString(m);
+}
+
+HV_EXPORT HvMessage *hv_msg_copy(const HvMessage *const m) {
+  return msg_copy(m);
+}
+
+HV_EXPORT void hv_msg_free(HvMessage *m) {
+  msg_free(m);
+}
+
+
+
+#if !HV_WIN
+#pragma mark - Heavy Common
+#endif
+
+HV_EXPORT int hv_getSize(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return (int) c->getSize();
+}
+
+HV_EXPORT double hv_getSampleRate(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->getSampleRate();
+}
+
+HV_EXPORT int hv_getNumInputChannels(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->getNumInputChannels();
+}
+
+HV_EXPORT int hv_getNumOutputChannels(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->getNumOutputChannels();
+}
+
+HV_EXPORT void hv_setPrintHook(HeavyContextInterface *c, HvPrintHook_t *f) {
+  hv_assert(c != nullptr);
+  c->setPrintHook(f);
+}
+
+HV_EXPORT HvPrintHook_t *hv_getPrintHook(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->getPrintHook();
+}
+
+HV_EXPORT void hv_setSendHook(HeavyContextInterface *c, HvSendHook_t *f) {
+  hv_assert(c != nullptr);
+  c->setSendHook(f);
+}
+
+HV_EXPORT hv_uint32_t hv_stringToHash(const char *s) {
+  return hv_string_to_hash(s);
+}
+
+HV_EXPORT bool hv_sendBangToReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash) {
+  hv_assert(c != nullptr);
+  return c->sendBangToReceiver(receiverHash);
+}
+
+HV_EXPORT bool hv_sendFloatToReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, float x) {
+  hv_assert(c != nullptr);
+  return c->sendFloatToReceiver(receiverHash, x);
+}
+
+HV_EXPORT bool hv_sendSymbolToReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, char *s) {
+  hv_assert(c != nullptr);
+  return c->sendSymbolToReceiver(receiverHash, s);
+}
+
+HV_EXPORT bool hv_sendMessageToReceiverV(
+    HeavyContextInterface *c, hv_uint32_t receiverHash, double delayMs, const char *format, ...) {
+  hv_assert(c != nullptr);
+  hv_assert(delayMs >= 0.0);
+  hv_assert(format != nullptr);
+
+  va_list ap;
+  va_start(ap, format);
+  const int numElem = (int) hv_strlen(format);
+  HvMessage *m = HV_MESSAGE_ON_STACK(numElem);
+  msg_init(m, numElem, c->getCurrentSample() + (hv_uint32_t) (hv_max_d(0.0, delayMs)*c->getSampleRate()/1000.0));
+  for (int i = 0; i < numElem; i++) {
+    switch (format[i]) {
+      case 'b': msg_setBang(m, i); break;
+      case 'f': msg_setFloat(m, i, (float) va_arg(ap, double)); break;
+      case 'h': msg_setHash(m, i, (int) va_arg(ap, int)); break;
+      case 's': msg_setSymbol(m, i, (char *) va_arg(ap, char *)); break;
+      default: break;
+    }
+  }
+  va_end(ap);
+
+  return c->sendMessageToReceiver(receiverHash, delayMs, m);
+}
+
+HV_EXPORT bool hv_sendMessageToReceiver(
+    HeavyContextInterface *c, hv_uint32_t receiverHash, double delayMs, HvMessage *m) {
+  hv_assert(c != nullptr);
+  return c->sendMessageToReceiver(receiverHash, delayMs, m);
+}
+
+HV_EXPORT void hv_cancelMessage(HeavyContextInterface *c, HvMessage *m, void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  hv_assert(c != nullptr);
+  c->cancelMessage(m, sendMessage);
+}
+
+HV_EXPORT const char *hv_getName(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->getName();
+}
+
+HV_EXPORT void hv_setUserData(HeavyContextInterface *c, void *userData) {
+  hv_assert(c != nullptr);
+  c->setUserData(userData);
+}
+
+HV_EXPORT void *hv_getUserData(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->getUserData();
+}
+
+HV_EXPORT double hv_getCurrentTime(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return (double) c->samplesToMilliseconds(c->getCurrentSample());
+}
+
+HV_EXPORT hv_uint32_t hv_getCurrentSample(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->getCurrentSample();
+}
+
+HV_EXPORT float hv_samplesToMilliseconds(HeavyContextInterface *c, hv_uint32_t numSamples) {
+  hv_assert(c != nullptr);
+  return c->samplesToMilliseconds(numSamples);
+}
+
+HV_EXPORT hv_uint32_t hv_millisecondsToSamples(HeavyContextInterface *c, float ms) {
+  hv_assert(c != nullptr);
+  return c->millisecondsToSamples(ms);
+}
+
+HV_EXPORT int hv_getParameterInfo(HeavyContextInterface *c, int index, HvParameterInfo *info) {
+  hv_assert(c != nullptr);
+  return c->getParameterInfo(index, info);
+}
+
+HV_EXPORT void hv_lock_acquire(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  c->lockAcquire();
+}
+
+HV_EXPORT bool hv_lock_try(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  return c->lockTry();
+}
+
+HV_EXPORT void hv_lock_release(HeavyContextInterface *c) {
+  hv_assert(c != nullptr);
+  c->lockRelease();
+}
+
+HV_EXPORT void hv_setInputMessageQueueSize(HeavyContextInterface *c, hv_uint32_t inQueueKb) {
+  hv_assert(c != nullptr);
+  c->setInputMessageQueueSize(inQueueKb);
+}
+
+HV_EXPORT void hv_setOutputMessageQueueSize(HeavyContextInterface *c, hv_uint32_t outQueueKb) {
+  hv_assert(c != nullptr);
+  c->setOutputMessageQueueSize(outQueueKb);
+}
+
+HV_EXPORT bool hv_getNextSentMessage(HeavyContextInterface *c, hv_uint32_t *destinationHash, HvMessage *outMsg, hv_uint32_t msgLength) {
+  hv_assert(c != nullptr);
+  hv_assert(destinationHash != nullptr);
+  hv_assert(outMsg != nullptr);
+  return c->getNextSentMessage(destinationHash, outMsg, msgLength);
+}
+
+
+#if !HV_WIN
+#pragma mark - Heavy Common
+#endif
+
+HV_EXPORT int hv_process(HeavyContextInterface *c, float **inputBuffers, float **outputBuffers, int n) {
+  hv_assert(c != nullptr);
+  return c->process(inputBuffers, outputBuffers, n);
+}
+
+HV_EXPORT int hv_processInline(HeavyContextInterface *c, float *inputBuffers, float *outputBuffers, int n) {
+  hv_assert(c != nullptr);
+  return c->processInline(inputBuffers, outputBuffers, n);
+}
+
+HV_EXPORT int hv_processInlineInterleaved(HeavyContextInterface *c, float *inputBuffers, float *outputBuffers, int n) {
+  hv_assert(c != nullptr);
+  return c->processInlineInterleaved(inputBuffers, outputBuffers, n);
+}
+
+HV_EXPORT void hv_delete(HeavyContextInterface *c) {
+  delete c;
+}
+
+#ifdef __cplusplus
+}
+#endif

plugin/source/HvHeavy.h

@@ -0,0 +1,413 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_H_
+#define _HEAVY_H_
+
+#include "HvUtils.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef _HEAVY_DECLARATIONS_
+#define _HEAVY_DECLARATIONS_
+
+#ifdef __cplusplus
+class HeavyContextInterface;
+#else
+typedef struct HeavyContextInterface HeavyContextInterface;
+#endif
+
+typedef struct HvMessage HvMessage;
+
+typedef enum {
+  HV_PARAM_TYPE_PARAMETER_IN,
+  HV_PARAM_TYPE_PARAMETER_OUT,
+  HV_PARAM_TYPE_EVENT_IN,
+  HV_PARAM_TYPE_EVENT_OUT
+} HvParameterType;
+
+typedef struct HvParameterInfo {
+  const char *name;     // the human readable parameter name
+  hv_uint32_t hash;     // an integer identified used by heavy for this parameter
+  HvParameterType type; // type of this parameter
+  float minVal;         // the minimum value of this parameter
+  float maxVal;         // the maximum value of this parameter
+  float defaultVal;     // the default value of this parameter
+} HvParameterInfo;
+
+typedef void (HvSendHook_t) (HeavyContextInterface *context, const char *sendName, hv_uint32_t sendHash, const HvMessage *msg);
+typedef void (HvPrintHook_t) (HeavyContextInterface *context, const char *printName, const char *str, const HvMessage *msg);
+
+#endif // _HEAVY_DECLARATIONS_
+
+
+
+#if HV_APPLE
+#pragma mark - Heavy Context
+#endif
+
+/** Deletes a patch instance. */
+void hv_delete(HeavyContextInterface *c);
+
+
+
+#if HV_APPLE
+#pragma mark - Heavy Process
+#endif
+
+/**
+ * Processes one block of samples for a patch instance. The buffer format is an array of float channel arrays.
+ * If the context has not input or output channels, the respective argument may be NULL.
+ * The number of samples to to tbe processed should be a multiple of 1, 4, or 8, depending on if
+ * no, SSE or NEON, or AVX optimisation is being used, respectively.
+ * e.g. [[LLLL][RRRR]]
+ * This function support in-place processing.
+ *
+ * @return  The number of samples processed.
+ *
+ * This function is NOT thread-safe. It is assumed that only the audio thread will execute this function.
+ */
+int hv_process(HeavyContextInterface *c, float **inputBuffers, float **outputBuffers, int n);
+
+/**
+ * Processes one block of samples for a patch instance. The buffer format is an uninterleaved float array of channels.
+ * If the context has not input or output channels, the respective argument may be NULL.
+ * The number of samples to to tbe processed should be a multiple of 1, 4, or 8, depending on if
+ * no, SSE or NEON, or AVX optimisation is being used, respectively.
+ * e.g. [LLLLRRRR]
+ * This function support in-place processing.
+ *
+ * @return  The number of samples processed.
+ *
+ * This function is NOT thread-safe. It is assumed that only the audio thread will execute this function.
+ */
+int hv_processInline(HeavyContextInterface *c, float *inputBuffers, float *outputBuffers, int n);
+
+/**
+ * Processes one block of samples for a patch instance. The buffer format is an interleaved float array of channels.
+ * If the context has not input or output channels, the respective argument may be NULL.
+ * The number of samples to to tbe processed should be a multiple of 1, 4, or 8, depending on if
+ * no, SSE or NEON, or AVX optimisation is being used, respectively.
+ * e.g. [LRLRLRLR]
+ * This function support in-place processing.
+ *
+ * @return  The number of samples processed.
+ *
+ * This function is NOT thread-safe. It is assumed that only the audio thread will execute this function.
+ */
+int hv_processInlineInterleaved(HeavyContextInterface *c, float *inputBuffers, float *outputBuffers, int n);
+
+
+
+#if HV_APPLE
+#pragma mark - Heavy Common
+#endif
+
+/**
+ * Returns the total size in bytes of the context.
+ * This value may change if tables are resized.
+ */
+int hv_getSize(HeavyContextInterface *c);
+
+/** Returns the sample rate with which this context has been configured. */
+double hv_getSampleRate(HeavyContextInterface *c);
+
+/** Returns the number of input channels with which this context has been configured. */
+int hv_getNumInputChannels(HeavyContextInterface *c);
+
+/** Returns the number of output channels with which this context has been configured. */
+int hv_getNumOutputChannels(HeavyContextInterface *c);
+
+/** Set the print hook. The function is called whenever a message is sent to a print object. */
+void hv_setPrintHook(HeavyContextInterface *c, HvPrintHook_t *f);
+
+/** Returns the print hook, or NULL. */
+HvPrintHook_t *hv_getPrintHook(HeavyContextInterface *c);
+
+/**
+ * Set the send hook. The function is called whenever a message is sent to any send object.
+ * Messages returned by this function should NEVER be freed. If the message must persist, call
+ * hv_msg_copy() first.
+ */
+void hv_setSendHook(HeavyContextInterface *c, HvSendHook_t *f);
+
+/** Returns a 32-bit hash of any string. Returns 0 if string is NULL. */
+hv_uint32_t hv_stringToHash(const char *s);
+
+/**
+ * A convenience function to send a bang to a receiver to be processed immediately.
+ * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+ * This function is thread-safe.
+ *
+ * @return  True if the message was accepted. False if the message could not fit onto
+ *          the message queue to be processed this block.
+ */
+bool hv_sendBangToReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash);
+
+/**
+ * A convenience function to send a float to a receiver to be processed immediately.
+ * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+ * This function is thread-safe.
+ *
+ * @return  True if the message was accepted. False if the message could not fit onto
+ *          the message queue to be processed this block.
+ */
+bool hv_sendFloatToReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, const float x);
+
+/**
+ * A convenience function to send a symbol to a receiver to be processed immediately.
+ * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+ * This function is thread-safe.
+ *
+ * @return  True if the message was accepted. False if the message could not fit onto
+ *          the message queue to be processed this block.
+ */
+bool hv_sendSymbolToReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, char *s);
+
+/**
+ * Sends a formatted message to a receiver that can be scheduled for the future.
+ * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+ * This function is thread-safe.
+ *
+ * @return  True if the message was accepted. False if the message could not fit onto
+ *          the message queue to be processed this block.
+ */
+bool hv_sendMessageToReceiverV(HeavyContextInterface *c, hv_uint32_t receiverHash, double delayMs, const char *format, ...);
+
+/**
+ * Sends a message to a receiver that can be scheduled for the future.
+ * The receiver is addressed with its hash, which can also be determined using hv_stringToHash().
+ * This function is thread-safe.
+ *
+ * @return  True if the message was accepted. False if the message could not fit onto
+ *          the message queue to be processed this block.
+ */
+bool hv_sendMessageToReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, double delayMs, HvMessage *m);
+
+/**
+ * Cancels a previously scheduled message.
+ *
+ * @param sendMessage  May be NULL.
+ */
+void hv_cancelMessage(HeavyContextInterface *c, HvMessage *m, void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+/** Returns the read-only user-assigned name of this patch. */
+const char *hv_getName(HeavyContextInterface *c);
+
+/** Sets a user-definable value. This value is never manipulated by Heavy. */
+void hv_setUserData(HeavyContextInterface *c, void *userData);
+
+/** Returns the user-defined data. */
+void *hv_getUserData(HeavyContextInterface *c);
+
+/** Returns the current patch time in milliseconds. This value may have rounding errors. */
+double hv_getCurrentTime(HeavyContextInterface *c);
+
+/** Returns the current patch time in samples. This value is always exact. */
+hv_uint32_t hv_getCurrentSample(HeavyContextInterface *c);
+
+/**
+ * Returns information about each parameter such as name, hash, and range.
+ * The total number of parameters is always returned.
+ *
+ * @param index  The parameter index.
+ * @param info  A pointer to a HvParameterInfo struct. May be null.
+ *
+ * @return  The total number of parameters.
+ */
+int hv_getParameterInfo(HeavyContextInterface *c, int index, HvParameterInfo *info);
+
+/** */
+float hv_samplesToMilliseconds(HeavyContextInterface *c, hv_uint32_t numSamples);
+
+/** Converts milliseconds to samples. Input is limited to non-negative range. */
+hv_uint32_t hv_millisecondsToSamples(HeavyContextInterface *c, float ms);
+
+/**
+ * Acquire the input message queue lock.
+ *
+ * This function will block until the message lock as been acquired.
+ * Typical applications will not require the use of this function.
+ *
+ * @param c  A Heavy context.
+ */
+void hv_lock_acquire(HeavyContextInterface *c);
+
+/**
+ * Try to acquire the input message queue lock.
+ *
+ * If the lock has been acquired, hv_lock_release() must be called to release it.
+ * Typical applications will not require the use of this function.
+ *
+ * @param c  A Heavy context.
+ *
+ * @return Returns true if the lock has been acquired, false otherwise.
+ */
+bool hv_lock_try(HeavyContextInterface *c);
+
+/**
+ * Release the input message queue lock.
+ *
+ * Typical applications will not require the use of this function.
+ *
+ * @param c  A Heavy context.
+ */
+void hv_lock_release(HeavyContextInterface *c);
+
+/**
+ * Set the size of the input message queue in kilobytes.
+ *
+ * The buffer is reset and all existing contents are lost on resize.
+ *
+ * @param c  A Heavy context.
+ * @param inQueueKb  Must be positive i.e. at least one.
+ */
+void hv_setInputMessageQueueSize(HeavyContextInterface *c, hv_uint32_t inQueueKb);
+
+/**
+ * Set the size of the output message queue in kilobytes.
+ *
+ * The buffer is reset and all existing contents are lost on resize.
+ * Only the default sendhook uses the outgoing message queue. If the default
+ * sendhook is not being used, then this function is not useful.
+ *
+ * @param c  A Heavy context.
+ * @param outQueueKb  Must be postive i.e. at least one.
+ */
+void hv_setOutputMessageQueueSize(HeavyContextInterface *c, hv_uint32_t outQueueKb);
+
+/**
+ * Get the next message in the outgoing queue, will also consume the message.
+ * Returns false if there are no messages.
+ *
+ * @param c  A Heavy context.
+ * @param destinationHash  a hash of the name of the receiver the message was sent to.
+ * @param outMsg  message pointer that is filled by the next message contents.
+ * @param msgLength  length of outMsg in bytes.
+ *
+ * @return  True if there is a message in the outgoing queue.
+*/
+bool hv_getNextSentMessage(HeavyContextInterface *c, hv_uint32_t *destinationHash, HvMessage *outMsg, hv_uint32_t msgLength);
+
+
+
+#if HV_APPLE
+#pragma mark - Heavy Message
+#endif
+
+typedef struct HvMessage HvMessage;
+
+/** Returns the total size in bytes of a HvMessage with a number of elements on the heap. */
+unsigned long hv_msg_getByteSize(hv_uint32_t numElements);
+
+/** Initialise a HvMessage structure with the number of elements and a timestamp (in samples). */
+void hv_msg_init(HvMessage *m, int numElements, hv_uint32_t timestamp);
+
+/** Returns the number of elements in this message. */
+unsigned long hv_msg_getNumElements(const HvMessage *m);
+
+/** Returns the time at which this message exists (in samples). */
+hv_uint32_t hv_msg_getTimestamp(const HvMessage *m);
+
+/** Set the time at which this message should be executed (in samples). */
+void hv_msg_setTimestamp(HvMessage *m, hv_uint32_t timestamp);
+
+/** Returns true of the indexed element is a bang. False otherwise. Index is not bounds checked. */
+bool hv_msg_isBang(const HvMessage *const m, int i);
+
+/** Sets the indexed element to a bang. Index is not bounds checked. */
+void hv_msg_setBang(HvMessage *m, int i);
+
+/** Returns true of the indexed element is a float. False otherwise. Index is not bounds checked. */
+bool hv_msg_isFloat(const HvMessage *const m, int i);
+
+/** Returns the indexed element as a float value. Index is not bounds checked. */
+float hv_msg_getFloat(const HvMessage *const m, int i);
+
+/** Sets the indexed element to float value. Index is not bounds checked. */
+void hv_msg_setFloat(HvMessage *m, int i, float f);
+
+/** Returns true of the indexed element is a symbol. False otherwise. Index is not bounds checked. */
+bool hv_msg_isSymbol(const HvMessage *const m, int i);
+
+/** Returns the indexed element as a symbol value. Index is not bounds checked. */
+const char *hv_msg_getSymbol(const HvMessage *const m, int i);
+
+/** Returns true of the indexed element is a hash. False otherwise. Index is not bounds checked. */
+bool hv_msg_isHash(const HvMessage *const m, int i);
+
+/** Returns the indexed element as a hash value. Index is not bounds checked. */
+hv_uint32_t hv_msg_getHash(const HvMessage *const m, int i);
+
+/** Sets the indexed element to symbol value. Index is not bounds checked. */
+void hv_msg_setSymbol(HvMessage *m, int i, const char *s);
+
+/**
+ * Returns true if the message has the given format, in number of elements and type. False otherwise.
+ * Valid element types are:
+ * 'b': bang
+ * 'f': float
+ * 's': symbol
+ *
+ * For example, a message with three floats would have a format of "fff". A single bang is "b".
+ * A message with two symbols is "ss". These types can be mixed and matched in any way.
+ */
+bool hv_msg_hasFormat(const HvMessage *const m, const char *fmt);
+
+/**
+ * Returns a basic string representation of the message.
+ * The character array MUST be deallocated by the caller.
+ */
+char *hv_msg_toString(const HvMessage *const m);
+
+/** Copy a message onto the stack. The message persists. */
+HvMessage *hv_msg_copy(const HvMessage *const m);
+
+/** Free a copied message. */
+void hv_msg_free(HvMessage *m);
+
+
+
+#if HV_APPLE
+#pragma mark - Heavy Table
+#endif
+
+/**
+ * Resizes the table to the given length.
+ *
+ * Existing contents are copied to the new table. Remaining space is cleared
+ * if the table is longer than the original, truncated otherwise.
+ *
+ * @param tableHash  The table identifier.
+ * @param newSampleLength  The new length of the table, in samples. Must be positive.
+ *
+ * @return  False if the table could not be found. True otherwise.
+ */
+bool hv_table_setLength(HeavyContextInterface *c, hv_uint32_t tableHash, hv_uint32_t newSampleLength);
+
+/** Returns a pointer to the raw buffer backing this table. DO NOT free it. */
+float *hv_table_getBuffer(HeavyContextInterface *c, hv_uint32_t tableHash);
+
+/** Returns the length of this table in samples. */
+hv_uint32_t hv_table_getLength(HeavyContextInterface *c, hv_uint32_t tableHash);
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_H_

plugin/source/HvHeavyInternal.h

@@ -0,0 +1,51 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_INTERNAL_H_
+#define _HEAVY_INTERNAL_H_
+
+#include "HvHeavy.h"
+#include "HvUtils.h"
+#include "HvTable.h"
+#include "HvMessage.h"
+#include "HvMath.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ *
+ */
+HvTable *hv_table_get(HeavyContextInterface *c, hv_uint32_t tableHash);
+
+/**
+ *
+ */
+void hv_scheduleMessageForReceiver(HeavyContextInterface *c, hv_uint32_t receiverHash, HvMessage *m);
+
+/**
+ *
+ */
+HvMessage *hv_scheduleMessageForObject(HeavyContextInterface *c, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *),
+    int letIndex);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

plugin/source/HvLightPipe.c

@@ -0,0 +1,136 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvLightPipe.h"
+
+#if __SSE__ || HV_SIMD_SSE
+#include <xmmintrin.h>
+#define hv_sfence() _mm_sfence()
+#elif __arm__ || HV_SIMD_NEON
+  #if __ARM_ACLE
+    #include <arm_acle.h>
+    // https://msdn.microsoft.com/en-us/library/hh875058.aspx#BarrierRestrictions
+    // http://doxygen.reactos.org/d8/d47/armintr_8h_a02be7ec76ca51842bc90d9b466b54752.html
+    #define hv_sfence() __dmb(0xE) /* _ARM_BARRIER_ST */
+  #elif defined(__GNUC__)
+    #define hv_sfence() __asm__ volatile ("dmb 0xE":::"memory")
+  #else
+    // http://stackoverflow.com/questions/19965076/gcc-memory-barrier-sync-synchronize-vs-asm-volatile-memory
+    #define hv_sfence() __sync_synchronize()
+  #endif
+#elif HV_WIN
+// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684208(v=vs.85).aspx
+#define hv_sfence() _WriteBarrier()
+#else
+#define hv_sfence() __asm__ volatile("" : : : "memory")
+#endif
+
+#define HLP_STOP 0
+#define HLP_LOOP 0xFFFFFFFF
+#define HLP_SET_UINT32_AT_BUFFER(a, b) (*((hv_uint32_t *) (a)) = (b))
+#define HLP_GET_UINT32_AT_BUFFER(a) (*((hv_uint32_t *) (a)))
+
+hv_uint32_t hLp_init(HvLightPipe *q, hv_uint32_t numBytes) {
+  if (numBytes > 0) {
+    q->buffer = (char *) hv_malloc(numBytes);
+    hv_assert(q->buffer != NULL);
+    HLP_SET_UINT32_AT_BUFFER(q->buffer, HLP_STOP);
+  } else {
+    q->buffer = NULL;
+  }
+  q->writeHead = q->buffer;
+  q->readHead = q->buffer;
+  q->len = numBytes;
+  q->remainingBytes = numBytes;
+  return numBytes;
+}
+
+void hLp_free(HvLightPipe *q) {
+  hv_free(q->buffer);
+}
+
+hv_uint32_t hLp_hasData(HvLightPipe *q) {
+  hv_uint32_t x = HLP_GET_UINT32_AT_BUFFER(q->readHead);
+  if (x == HLP_LOOP) {
+    q->readHead = q->buffer;
+    x = HLP_GET_UINT32_AT_BUFFER(q->readHead);
+  }
+  return x;
+}
+
+char *hLp_getWriteBuffer(HvLightPipe *q, hv_uint32_t bytesToWrite) {
+  char *const readHead = q->readHead;
+  char *const oldWriteHead = q->writeHead;
+  const hv_uint32_t totalByteRequirement = bytesToWrite + 2*sizeof(hv_uint32_t);
+
+  // check if there is enough space to write the data in the remaining
+  // length of the buffer
+  if (totalByteRequirement <= q->remainingBytes) {
+    char *const newWriteHead = oldWriteHead + sizeof(hv_uint32_t) + bytesToWrite;
+
+    // check if writing would overwrite existing data in the pipe (return NULL if so)
+    if ((oldWriteHead < readHead) && (newWriteHead >= readHead)) return NULL;
+    else return (oldWriteHead + sizeof(hv_uint32_t));
+  } else {
+    // there isn't enough space, try looping around to the start
+    if (totalByteRequirement <= q->len) {
+      if ((oldWriteHead < readHead) || ((q->buffer + totalByteRequirement) > readHead)) {
+        return NULL; // overwrite condition
+      } else {
+        q->writeHead = q->buffer;
+        q->remainingBytes = q->len;
+        HLP_SET_UINT32_AT_BUFFER(q->buffer, HLP_STOP);
+        hv_sfence();
+        HLP_SET_UINT32_AT_BUFFER(oldWriteHead, HLP_LOOP);
+        return q->buffer + sizeof(hv_uint32_t);
+      }
+    } else {
+      return NULL; // there isn't enough space to write the data
+    }
+  }
+}
+
+void hLp_produce(HvLightPipe *q, hv_uint32_t numBytes) {
+  hv_assert(q->remainingBytes >= (numBytes + 2*sizeof(hv_uint32_t)));
+  q->remainingBytes -= (sizeof(hv_uint32_t) + numBytes);
+  char *const oldWriteHead = q->writeHead;
+  q->writeHead += (sizeof(hv_uint32_t) + numBytes);
+  HLP_SET_UINT32_AT_BUFFER(q->writeHead, HLP_STOP);
+
+  // save everything before this point to memory
+  hv_sfence();
+
+  // then save this
+  HLP_SET_UINT32_AT_BUFFER(oldWriteHead, numBytes);
+}
+
+char *hLp_getReadBuffer(HvLightPipe *q, hv_uint32_t *numBytes) {
+  *numBytes = HLP_GET_UINT32_AT_BUFFER(q->readHead);
+  char *const readBuffer = q->readHead + sizeof(hv_uint32_t);
+  return readBuffer;
+}
+
+void hLp_consume(HvLightPipe *q) {
+  hv_assert(HLP_GET_UINT32_AT_BUFFER(q->readHead) != HLP_STOP);
+  q->readHead += sizeof(hv_uint32_t) + HLP_GET_UINT32_AT_BUFFER(q->readHead);
+}
+
+void hLp_reset(HvLightPipe *q) {
+  q->writeHead = q->buffer;
+  q->readHead = q->buffer;
+  q->remainingBytes = q->len;
+  memset(q->buffer, 0, q->len);
+}

plugin/source/HvLightPipe.h

@@ -0,0 +1,104 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_LIGHTPIPE_H_
+#define _HEAVY_LIGHTPIPE_H_
+
+#include "HvUtils.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * This pipe assumes that there is only one producer thread and one consumer
+ * thread. This data structure does not support any other configuration.
+ */
+typedef struct HvLightPipe {
+  char *buffer;
+  char *writeHead;
+  char *readHead;
+  hv_uint32_t len;
+  hv_uint32_t remainingBytes; // total bytes from write head to end
+} HvLightPipe;
+
+/**
+ * Initialise the pipe with a given length, in bytes.
+ * @return  Returns the size of the pipe in bytes.
+ */
+hv_uint32_t hLp_init(HvLightPipe *q, hv_uint32_t numBytes);
+
+/**
+ * Frees the internal buffer.
+ * @param q  The light pipe.
+ */
+void hLp_free(HvLightPipe *q);
+
+/**
+ * Indicates if data is available for reading.
+ * @param q  The light pipe.
+ *
+ * @return Returns the number of bytes available for reading. Zero if no bytes
+ *         are available.
+ */
+hv_uint32_t hLp_hasData(HvLightPipe *q);
+
+/**
+ * Returns a pointer to a location in the pipe where numBytes can be written.
+ *
+ * @param numBytes  The number of bytes to be written.
+ * @return  A pointer to a location where those bytes can be written. Returns
+ *          NULL if no more space is available. Successive calls to this
+ *          function may eventually return a valid pointer because the readhead
+ *          has been advanced on another thread.
+ */
+char *hLp_getWriteBuffer(HvLightPipe *q, hv_uint32_t numBytes);
+
+/**
+ * Indicates to the pipe how many bytes have been written.
+ *
+ * @param numBytes  The number of bytes written. In general this should be the
+ *                  same value as was passed to the preceeding call to
+ *                  hLp_getWriteBuffer().
+ */
+void hLp_produce(HvLightPipe *q, hv_uint32_t numBytes);
+
+/**
+ * Returns the current read buffer, indicating the number of bytes available
+ * for reading.
+ * @param q  The light pipe.
+ * @param numBytes  This value will be filled with the number of bytes available
+ *                  for reading.
+ *
+ * @return  A pointer to the read buffer.
+ */
+char *hLp_getReadBuffer(HvLightPipe *q, hv_uint32_t *numBytes);
+
+/**
+ * Indicates that the next set of bytes have been read and are no longer needed.
+ * @param q  The light pipe.
+ */
+void hLp_consume(HvLightPipe *q);
+
+// resets the queue to it's initialised state
+// This should be done when only one thread is accessing the pipe.
+void hLp_reset(HvLightPipe *q);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _HEAVY_LIGHTPIPE_H_

plugin/source/HvMath.h

@@ -0,0 +1,724 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_MATH_H_
+#define _HEAVY_MATH_H_
+
+#include "HvUtils.h"
+
+// https://software.intel.com/sites/landingpage/IntrinsicsGuide/
+// https://gcc.gnu.org/onlinedocs/gcc-4.8.1/gcc/ARM-NEON-Intrinsics.html
+// http://codesuppository.blogspot.co.uk/2015/02/sse2neonh-porting-guide-and-header-file.html
+
+static inline void __hv_zero_f(hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_setzero_ps();
+#elif HV_SIMD_SSE
+  *bOut = _mm_setzero_ps();
+#elif HV_SIMD_NEON
+  *bOut = vdupq_n_f32(0.0f);
+#else // HV_SIMD_NONE
+  *bOut = 0.0f;
+#endif
+}
+
+static inline void __hv_zero_i(hv_bOuti_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_setzero_si256();
+#elif HV_SIMD_SSE
+  *bOut = _mm_setzero_si128();
+#elif HV_SIMD_NEON
+  *bOut = vdupq_n_s32(0);
+#else // HV_SIMD_NONE
+  *bOut = 0;
+#endif
+}
+
+static inline void __hv_load_f(float *bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_load_ps(bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_load_ps(bIn);
+#elif HV_SIMD_NEON
+  *bOut = vld1q_f32(bIn);
+#else // HV_SIMD_NONE
+  *bOut = *bIn;
+#endif
+}
+
+static inline void __hv_store_f(float *bOut, hv_bInf_t bIn) {
+#if HV_SIMD_AVX
+  _mm256_store_ps(bOut, bIn);
+#elif HV_SIMD_SSE
+  _mm_store_ps(bOut, bIn);
+#elif HV_SIMD_NEON
+  vst1q_f32(bOut, bIn);
+#else // HV_SIMD_NONE
+  *bOut = bIn;
+#endif
+}
+
+static inline void __hv_log2_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_log2_f() not implemented
+#elif HV_SIMD_SSE
+  // https://en.wikipedia.org/wiki/Fast_inverse_square_root
+  __m128i a = _mm_castps_si128(bIn);
+  __m128i b = _mm_srli_epi32(a, 23);
+  __m128i c = _mm_sub_epi32(b, _mm_set1_epi32(127)); // exponent (int)
+  __m128 d = _mm_cvtepi32_ps(c); // exponent (float)
+  __m128i e = _mm_or_si128(_mm_andnot_si128(_mm_set1_epi32(0xFF800000), a), _mm_set1_epi32(0x3F800000));
+  __m128 f = _mm_castsi128_ps(e); // 1+m (float)
+  __m128 g = _mm_add_ps(d, f); // e + 1 + m
+  __m128 h = _mm_add_ps(g, _mm_set1_ps(-0.9569643f)); // e + 1 + m + (sigma-1)
+  *bOut = h;
+#elif HV_SIMD_NEON
+  int32x4_t a = vreinterpretq_s32_f32(bIn);
+  int32x4_t b = vshrq_n_s32(a, 23);
+  int32x4_t c = vsubq_s32(b, vdupq_n_s32(127));
+  float32x4_t d = vcvtq_f32_s32(c);
+  int32x4_t e = vorrq_s32(vbicq_s32(a, vdupq_n_s32(0xFF800000)), vdupq_n_s32(0x3F800000));
+  float32x4_t f = vreinterpretq_f32_s32(e);
+  float32x4_t g = vaddq_f32(d, f);
+  float32x4_t h = vaddq_f32(g, vdupq_n_f32(-0.9569643f));
+  *bOut = h;
+#else // HV_SIMD_NONE
+  *bOut = 1.442695040888963f * hv_log_f(bIn);
+#endif
+}
+
+// NOTE(mhroth): this is a pretty ghetto implementation
+static inline void __hv_cos_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_set_ps(
+      hv_cos_f(bIn[7]), hv_cos_f(bIn[6]), hv_cos_f(bIn[5]), hv_cos_f(bIn[4]),
+      hv_cos_f(bIn[3]), hv_cos_f(bIn[2]), hv_cos_f(bIn[1]), hv_cos_f(bIn[0]));
+#elif HV_SIMD_SSE
+  const float *const b = (float *) &bIn;
+  *bOut = _mm_set_ps(hv_cos_f(b[3]), hv_cos_f(b[2]), hv_cos_f(b[1]), hv_cos_f(b[0]));
+#elif HV_SIMD_NEON
+  *bOut = (float32x4_t) {hv_cos_f(bIn[0]), hv_cos_f(bIn[1]), hv_cos_f(bIn[2]), hv_cos_f(bIn[3])};
+#else // HV_SIMD_NONE
+  *bOut = hv_cos_f(bIn);
+#endif
+}
+
+static inline void __hv_acos_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_acos_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_acos_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_acos_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_acos_f(bIn);
+#endif
+}
+
+static inline void __hv_cosh_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_cosh_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_cosh_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_cosh_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_cosh_f(bIn);
+#endif
+}
+
+static inline void __hv_acosh_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_acosh_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_acosh_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_acosh_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_acosh_f(bIn);
+#endif
+}
+
+static inline void __hv_sin_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_sin_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_sin_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_sin_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_sin_f(bIn);
+#endif
+}
+
+static inline void __hv_asin_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_asin_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_asin_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_asin_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_asin_f(bIn);
+#endif
+}
+
+static inline void __hv_sinh_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_sinh_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_sinh_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_sinh_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_sinh_f(bIn);
+#endif
+}
+
+static inline void __hv_asinh_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_asinh_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_asinh_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_asinh_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_asinh_f(bIn);
+#endif
+}
+
+static inline void __hv_tan_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_tan_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_tan_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_tan_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_tan_f(bIn);
+#endif
+}
+
+static inline void __hv_atan_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_atan_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_atan_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_atan_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_atan_f(bIn);
+#endif
+}
+
+static inline void __hv_atan2_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_atan2_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_atan2_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_atan2_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_atan2_f(bIn0, bIn1);
+#endif
+}
+
+static inline void __hv_tanh_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_tanh_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_tanh_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_tanh_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_tanh_f(bIn);
+#endif
+}
+
+static inline void __hv_atanh_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  hv_assert(0); // __hv_atanh_f() not implemented
+#elif HV_SIMD_SSE
+  hv_assert(0); // __hv_atanh_f() not implemented
+#elif HV_SIMD_NEON
+  hv_assert(0); // __hv_atanh_f() not implemented
+#else // HV_SIMD_NONE
+  *bOut = hv_atanh_f(bIn);
+#endif
+}
+
+static inline void __hv_sqrt_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_sqrt_ps(bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_sqrt_ps(bIn);
+#elif HV_SIMD_NEON
+  const float32x4_t y = vrsqrteq_f32(bIn);
+  *bOut = vmulq_f32(bIn, vmulq_f32(vrsqrtsq_f32(vmulq_f32(bIn, y), y), y)); // numerical results may be inexact
+#else // HV_SIMD_NONE
+  *bOut = hv_sqrt_f(bIn);
+#endif
+}
+
+static inline void __hv_rsqrt_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_rsqrt_ps(bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_rsqrt_ps(bIn);
+#elif HV_SIMD_NEON
+  const float32x4_t y = vrsqrteq_f32(bIn);
+  *bOut = vmulq_f32(vrsqrtsq_f32(vmulq_f32(bIn, y), y), y); // numerical results may be inexact
+#else // HV_SIMD_NONE
+  *bOut = 1.0f/hv_sqrt_f(bIn);
+#endif
+}
+
+static inline void __hv_abs_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_andnot_ps(_mm256_set1_ps(-0.0f), bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_andnot_ps(_mm_set1_ps(-0.0f), bIn); // == 1 << 31
+#elif HV_SIMD_NEON
+  *bOut = vabsq_f32(bIn);
+#else // HV_SIMD_NONE
+  *bOut = hv_abs_f(bIn);
+#endif
+}
+
+static inline void __hv_neg_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_xor_ps(bIn, _mm256_set1_ps(-0.0f));
+#elif HV_SIMD_SSE
+  *bOut = _mm_xor_ps(bIn, _mm_set1_ps(-0.0f));
+#elif HV_SIMD_NEON
+  *bOut = vnegq_f32(bIn);
+#else // HV_SIMD_NONE
+  *bOut = bIn * -1.0f;
+#endif
+}
+
+static inline void __hv_exp_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  float *const b = (float *) hv_alloca(HV_N_SIMD*sizeof(float));
+  _mm256_store_ps(b, bIn);
+  *bOut = _mm256_set_ps(
+      hv_exp_f(b[7]), hv_exp_f(b[6]), hv_exp_f(b[5]), hv_exp_f(b[4]),
+      hv_exp_f(b[3]), hv_exp_f(b[2]), hv_exp_f(b[1]), hv_exp_f(b[0]));
+#elif HV_SIMD_SSE
+  float *const b = (float *) hv_alloca(HV_N_SIMD*sizeof(float));
+  _mm_store_ps(b, bIn);
+  *bOut = _mm_set_ps(hv_exp_f(b[3]), hv_exp_f(b[2]), hv_exp_f(b[1]), hv_exp_f(b[0]));
+#elif HV_SIMD_NEON
+  *bOut = (float32x4_t) {
+    hv_exp_f(bIn[0]),
+    hv_exp_f(bIn[1]),
+    hv_exp_f(bIn[2]),
+    hv_exp_f(bIn[3])};
+#else // HV_SIMD_NONE
+  *bOut = hv_exp_f(bIn);
+#endif
+}
+
+static inline void __hv_ceil_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_ceil_ps(bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_ceil_ps(bIn);
+#elif HV_SIMD_NEON
+#if __ARM_ARCH >= 8
+  *bOut = vrndpq_f32(bIn);
+#else
+  // A slow NEON implementation of __hv_ceil_f() is being used because
+  // the necessary intrinsic cannot be found. It is only available in ARMv8.
+  *bOut = (float32x4_t) {hv_ceil_f(bIn[0]), hv_ceil_f(bIn[1]), hv_ceil_f(bIn[2]), hv_ceil_f(bIn[3])};
+#endif // vrndpq_f32
+#else // HV_SIMD_NONE
+  *bOut = hv_ceil_f(bIn);
+#endif
+}
+
+static inline void __hv_floor_f(hv_bInf_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_floor_ps(bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_floor_ps(bIn);
+#elif HV_SIMD_NEON
+#if __ARM_ARCH >= 8
+  *bOut = vrndmq_f32(bIn);
+#else
+  // A slow implementation of __hv_floor_f() is being used because
+  // the necessary intrinsic cannot be found. It is only available from ARMv8.
+  *bOut = (float32x4_t) {hv_floor_f(bIn[0]), hv_floor_f(bIn[1]), hv_floor_f(bIn[2]), hv_floor_f(bIn[3])};
+#endif // vrndmq_f32
+#else // HV_SIMD_NONE
+  *bOut = hv_floor_f(bIn);
+#endif
+}
+
+// __add~f
+static inline void __hv_add_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_add_ps(bIn0, bIn1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_add_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vaddq_f32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = bIn0 + bIn1;
+#endif
+}
+
+// __add~i
+static inline void __hv_add_i(hv_bIni_t bIn0, hv_bIni_t bIn1, hv_bOuti_t bOut) {
+#if HV_SIMD_AVX
+  __m128i x = _mm_add_epi32(_mm256_castsi256_si128(bIn0), _mm256_castsi256_si128(bIn1));
+  __m128i y = _mm_add_epi32(_mm256_extractf128_si256(bIn0, 1), _mm256_extractf128_si256(bIn1, 1));
+  *bOut = _mm256_insertf128_si256(_mm256_castsi128_si256(x), y, 1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_add_epi32(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vaddq_s32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = bIn0 + bIn1;
+#endif
+}
+
+// __sub~f
+static inline void __hv_sub_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_sub_ps(bIn0, bIn1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_sub_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vsubq_f32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = bIn0 - bIn1;
+#endif
+}
+
+// __mul~f
+static inline void __hv_mul_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_mul_ps(bIn0, bIn1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_mul_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vmulq_f32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = bIn0 * bIn1;
+#endif
+}
+
+// __*~i
+static inline void __hv_mul_i(hv_bIni_t bIn0, hv_bIni_t bIn1, hv_bOuti_t bOut) {
+#if HV_SIMD_AVX
+  __m128i x = _mm_mullo_epi32(_mm256_castsi256_si128(bIn0), _mm256_castsi256_si128(bIn1));
+  __m128i y = _mm_mullo_epi32(_mm256_extractf128_si256(bIn0, 1), _mm256_extractf128_si256(bIn1, 1));
+  *bOut = _mm256_insertf128_si256(_mm256_castsi128_si256(x), y, 1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_mullo_epi32(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vmulq_s32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = bIn0 * bIn1;
+#endif
+}
+
+// __cast~if
+static inline void __hv_cast_if(hv_bIni_t bIn, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_cvtepi32_ps(bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_cvtepi32_ps(bIn);
+#elif HV_SIMD_NEON
+  *bOut = vcvtq_f32_s32(bIn);
+#else // HV_SIMD_NONE
+  *bOut = (float) bIn;
+#endif
+}
+
+// __cast~fi
+static inline void __hv_cast_fi(hv_bInf_t bIn, hv_bOuti_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_cvtps_epi32(bIn);
+#elif HV_SIMD_SSE
+  *bOut = _mm_cvtps_epi32(bIn);
+#elif HV_SIMD_NEON
+  *bOut = vcvtq_s32_f32(bIn);
+#else // HV_SIMD_NONE
+  *bOut = (int) bIn;
+#endif
+}
+
+static inline void __hv_div_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  __m256 a = _mm256_cmp_ps(bIn1, _mm256_setzero_ps(), _CMP_EQ_OQ);
+  __m256 b = _mm256_div_ps(bIn0, bIn1);
+  *bOut = _mm256_andnot_ps(a, b);
+#elif HV_SIMD_SSE
+  __m128 a = _mm_cmpeq_ps(bIn1, _mm_setzero_ps());
+  __m128 b = _mm_div_ps(bIn0, bIn1);
+  *bOut = _mm_andnot_ps(a, b);
+#elif HV_SIMD_NEON
+  uint32x4_t a = vceqq_f32(bIn1, vdupq_n_f32(0.0f));
+  float32x4_t b = vmulq_f32(bIn0, vrecpeq_f32(bIn1)); // NOTE(mhroth): numerical results may be inexact
+  *bOut = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(b), a));
+#else // HV_SIMD_NONE
+  *bOut = (bIn1 != 0.0f) ? (bIn0 / bIn1) : 0.0f;
+#endif
+}
+
+static inline void __hv_min_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_min_ps(bIn0, bIn1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_min_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vminq_f32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = hv_min_f(bIn0, bIn1);
+#endif
+}
+
+static inline void __hv_min_i(hv_bIni_t bIn0, hv_bIni_t bIn1, hv_bOuti_t bOut) {
+#if HV_SIMD_AVX
+  __m128i x = _mm_min_epi32(_mm256_castsi256_si128(bIn0), _mm256_castsi256_si128(bIn1));
+  __m128i y = _mm_min_epi32(_mm256_extractf128_si256(bIn0, 1), _mm256_extractf128_si256(bIn1, 1));
+  *bOut = _mm256_insertf128_si256(_mm256_castsi128_si256(x), y, 1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_min_epi32(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vminq_s32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = hv_min_i(bIn0, bIn1);
+#endif
+}
+
+static inline void __hv_max_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_max_ps(bIn0, bIn1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_max_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vmaxq_f32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = hv_max_f(bIn0, bIn1);
+#endif
+}
+
+static inline void __hv_max_i(hv_bIni_t bIn0, hv_bIni_t bIn1, hv_bOuti_t bOut) {
+#if HV_SIMD_AVX
+  __m128i x = _mm_max_epi32(_mm256_castsi256_si128(bIn0), _mm256_castsi256_si128(bIn1));
+  __m128i y = _mm_max_epi32(_mm256_extractf128_si256(bIn0, 1), _mm256_extractf128_si256(bIn1, 1));
+  *bOut = _mm256_insertf128_si256(_mm256_castsi128_si256(x), y, 1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_max_epi32(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vmaxq_s32(bIn0, bIn1);
+#else // HV_SIMD_NONE
+  *bOut = hv_max_i(bIn0, bIn1);
+#endif
+}
+
+static inline void __hv_pow_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  float *b = (float *) hv_alloca(16*sizeof(float));
+  _mm256_store_ps(b, bIn0);
+  _mm256_store_ps(b+8, bIn1);
+  *bOut = _mm256_set_ps(
+      hv_pow_f(b[7], b[7]),
+      hv_pow_f(b[6], b[6]),
+      hv_pow_f(b[5], b[5]),
+      hv_pow_f(b[4], b[4]),
+      hv_pow_f(b[3], b[3]),
+      hv_pow_f(b[2], b[2]),
+      hv_pow_f(b[1], b[1]),
+      hv_pow_f(b[0], b[0]));
+#elif HV_SIMD_SSE
+  float *b = (float *) hv_alloca(8*sizeof(float));
+  _mm_store_ps(b, bIn0);
+  _mm_store_ps(b+4, bIn1);
+  *bOut = _mm_set_ps(
+      hv_pow_f(b[3], b[7]),
+      hv_pow_f(b[2], b[6]),
+      hv_pow_f(b[1], b[5]),
+      hv_pow_f(b[0], b[4]));
+#elif HV_SIMD_NEON
+  *bOut = (float32x4_t) {
+      hv_pow_f(bIn0[0], bIn1[0]),
+      hv_pow_f(bIn0[1], bIn1[1]),
+      hv_pow_f(bIn0[2], bIn1[2]),
+      hv_pow_f(bIn0[3], bIn1[3])};
+#else // HV_SIMD_NONE
+  *bOut = hv_pow_f(bIn0, bIn1);
+#endif
+}
+
+static inline void __hv_gt_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_cmp_ps(bIn0, bIn1, _CMP_GT_OQ);
+#elif HV_SIMD_SSE
+  *bOut = _mm_cmpgt_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_u32(vcgtq_f32(bIn0, bIn1));
+#else // HV_SIMD_NONE
+  *bOut = (bIn0 > bIn1) ? 1.0f : 0.0f;
+#endif
+}
+
+static inline void __hv_gte_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_cmp_ps(bIn0, bIn1, _CMP_GE_OQ);
+#elif HV_SIMD_SSE
+  *bOut = _mm_cmpge_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_u32(vcgeq_f32(bIn0, bIn1));
+#else // HV_SIMD_NONE
+  *bOut = (bIn0 >= bIn1) ? 1.0f : 0.0f;
+#endif
+}
+
+static inline void __hv_lt_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_cmp_ps(bIn0, bIn1, _CMP_LT_OQ);
+#elif HV_SIMD_SSE
+  *bOut = _mm_cmplt_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_u32(vcltq_f32(bIn0, bIn1));
+#else // HV_SIMD_NONE
+  *bOut = (bIn0 < bIn1) ? 1.0f : 0.0f;
+#endif
+}
+
+static inline void __hv_lte_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_cmp_ps(bIn0, bIn1, _CMP_LE_OQ);
+#elif HV_SIMD_SSE
+  *bOut = _mm_cmple_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_u32(vcleq_f32(bIn0, bIn1));
+#else // HV_SIMD_NONE
+  *bOut = (bIn0 <= bIn1) ? 1.0f : 0.0f;
+#endif
+}
+
+static inline void __hv_neq_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_cmp_ps(bIn0, bIn1, _CMP_NEQ_OQ);
+#elif HV_SIMD_SSE
+  *bOut = _mm_cmpneq_ps(bIn0, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_u32(vmvnq_u32(vceqq_f32(bIn0, bIn1)));
+#else // HV_SIMD_NONE
+  *bOut = (bIn0 != bIn1) ? 1.0f : 0.0f;
+#endif
+}
+
+static inline void __hv_or_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_or_ps(bIn1, bIn0);
+#elif HV_SIMD_SSE
+  *bOut = _mm_or_ps(bIn1, bIn0);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_u32(vorrq_u32(vreinterpretq_u32_f32(bIn1), vreinterpretq_u32_f32(bIn0)));
+#else // HV_SIMD_NONE
+  if (bIn0 == 0.0f && bIn1 == 0.0f) *bOut = 0.0f;
+  else if (bIn0 == 0.0f) *bOut = bIn1;
+  else if (bIn1 == 0.0f) *bOut = bIn0;
+  else hv_assert(0);
+#endif
+}
+
+static inline void __hv_and_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_and_ps(bIn1, bIn0);
+#elif HV_SIMD_SSE
+  *bOut = _mm_and_ps(bIn1, bIn0);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_u32(vandq_u32(vreinterpretq_u32_f32(bIn1), vreinterpretq_u32_f32(bIn0)));
+#else // HV_SIMD_NONE
+  if (bIn0 == 0.0f || bIn1 == 0.0f) *bOut = 0.0f;
+  else if (bIn0 == 1.0f) *bOut = bIn1;
+  else if (bIn1 == 1.0f) *bOut = bIn0;
+  else hv_assert(0);
+#endif
+}
+
+static inline void __hv_andnot_f(hv_bInf_t bIn0_mask, hv_bInf_t bIn1, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+  *bOut = _mm256_andnot_ps(bIn0_mask, bIn1);
+#elif HV_SIMD_SSE
+  *bOut = _mm_andnot_ps(bIn0_mask, bIn1);
+#elif HV_SIMD_NEON
+  *bOut = vreinterpretq_f32_s32(vbicq_s32(vreinterpretq_s32_f32(bIn1), vreinterpretq_s32_f32(bIn0_mask)));
+#else // HV_SIMD_NONE
+  *bOut = (bIn0_mask == 0.0f) ? bIn1 : 0.0f;
+#endif
+}
+
+// bOut = (bIn0 * bIn1) + bIn2
+static inline void __hv_fma_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bInf_t bIn2, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+#if HV_SIMD_FMA
+  *bOut = _mm256_fmadd_ps(bIn0, bIn1, bIn2);
+#else
+  *bOut = _mm256_add_ps(_mm256_mul_ps(bIn0, bIn1), bIn2);
+#endif // HV_SIMD_FMA
+#elif HV_SIMD_SSE
+#if HV_SIMD_FMA
+  *bOut = _mm_fmadd_ps(bIn0, bIn1, bIn2);
+#else
+  *bOut = _mm_add_ps(_mm_mul_ps(bIn0, bIn1), bIn2);
+#endif // HV_SIMD_FMA
+#elif HV_SIMD_NEON
+#if __ARM_ARCH >= 8
+  *bOut = vfmaq_f32(bIn2, bIn0, bIn1);
+#else
+  // NOTE(mhroth): it turns out, fma SUUUUCKS on lesser ARM architectures
+  *bOut = vaddq_f32(vmulq_f32(bIn0, bIn1), bIn2);
+#endif
+#else // HV_SIMD_NONE
+  *bOut = hv_fma_f(bIn0, bIn1, bIn2);
+#endif
+}
+
+// bOut = (bIn0 * bIn1) - bIn2
+static inline void __hv_fms_f(hv_bInf_t bIn0, hv_bInf_t bIn1, hv_bInf_t bIn2, hv_bOutf_t bOut) {
+#if HV_SIMD_AVX
+#if HV_SIMD_FMA
+  *bOut = _mm256_fmsub_ps(bIn0, bIn1, bIn2);
+#else
+  *bOut = _mm256_sub_ps(_mm256_mul_ps(bIn0, bIn1), bIn2);
+#endif // HV_SIMD_FMA
+#elif HV_SIMD_SSE
+#if HV_SIMD_FMA
+  *bOut = _mm_fmsub_ps(bIn0, bIn1, bIn2);
+#else
+  *bOut = _mm_sub_ps(_mm_mul_ps(bIn0, bIn1), bIn2);
+#endif // HV_SIMD_FMA
+#elif HV_SIMD_NEON
+#if __ARM_ARCH >= 8
+  *bOut = vfmsq_f32(bIn2, bIn0, bIn1);
+#else
+  // NOTE(mhroth): it turns out, fma SUUUUCKS on lesser ARM architectures
+  *bOut = vsubq_f32(vmulq_f32(bIn0, bIn1), bIn2);
+#endif
+#else // HV_SIMD_NONE
+  *bOut = (bIn0 * bIn1) - bIn2;
+#endif
+}
+
+#endif // _HEAVY_MATH_H_

plugin/source/HvMessage.c

@@ -0,0 +1,199 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvMessage.h"
+
+HvMessage *msg_init(HvMessage *m, hv_size_t numElements, hv_uint32_t timestamp) {
+  m->timestamp = timestamp;
+  m->numElements = (hv_uint16_t) numElements;
+  m->numBytes = (hv_uint16_t) msg_getCoreSize(numElements);
+  return m;
+}
+
+HvMessage *msg_initWithFloat(HvMessage *m, hv_uint32_t timestamp, float f) {
+  m->timestamp = timestamp;
+  m->numElements = 1;
+  m->numBytes = sizeof(HvMessage);
+  msg_setFloat(m, 0, f);
+  return m;
+}
+
+HvMessage *msg_initWithBang(HvMessage *m, hv_uint32_t timestamp) {
+  m->timestamp = timestamp;
+  m->numElements = 1;
+  m->numBytes = sizeof(HvMessage);
+  msg_setBang(m, 0);
+  return m;
+}
+
+HvMessage *msg_initWithSymbol(HvMessage *m, hv_uint32_t timestamp, const char *s) {
+  m->timestamp = timestamp;
+  m->numElements = 1;
+  m->numBytes = sizeof(HvMessage) + (hv_uint16_t) hv_strlen(s);
+  msg_setSymbol(m, 0, s);
+  return m;
+}
+
+HvMessage *msg_initWithHash(HvMessage *m, hv_uint32_t timestamp, hv_uint32_t h) {
+  m->timestamp = timestamp;
+  m->numElements = 1;
+  m->numBytes = sizeof(HvMessage);
+  msg_setHash(m, 0, h);
+  return m;
+}
+
+void msg_copyToBuffer(const HvMessage *m, char *buffer, hv_size_t len) {
+  HvMessage *r = (HvMessage *) buffer;
+
+  hv_size_t len_r = msg_getCoreSize(msg_getNumElements(m));
+
+  // assert that the message is not already larger than the length of the buffer
+  hv_assert(len_r <= len);
+
+  // copy the basic message to the buffer
+  hv_memcpy(r, m, len_r);
+
+  char *p = buffer + len_r; // points to the end of the base message
+  for (int i = 0; i < msg_getNumElements(m); ++i) {
+    if (msg_isSymbol(m,i)) {
+      const hv_size_t symLen = (hv_size_t) hv_strlen(msg_getSymbol(m,i)) + 1; // include the trailing null char
+      hv_assert(len_r + symLen <= len); // stay safe!
+      hv_strncpy(p, msg_getSymbol(m,i), symLen);
+      msg_setSymbol(r, i, p);
+      p += symLen;
+      len_r += symLen;
+    }
+  }
+
+  r->numBytes = (hv_uint16_t) len_r; // update the message size in memory
+}
+
+// the message is serialised such that all symbol elements are placed in order at the end of the buffer
+HvMessage *msg_copy(const HvMessage *m) {
+  const hv_uint32_t heapSize = msg_getSize(m);
+  char *r = (char *) hv_malloc(heapSize);
+  hv_assert(r != NULL);
+  msg_copyToBuffer(m, r, heapSize);
+  return (HvMessage *) r;
+}
+
+void msg_free(HvMessage *m) {
+  hv_free(m); // because heap messages are serialised in memory, a simple call to free releases the message
+}
+
+bool msg_hasFormat(const HvMessage *m, const char *fmt) {
+  hv_assert(fmt != NULL);
+  const int n = msg_getNumElements(m);
+  for (int i = 0; i < n; ++i) {
+    switch (fmt[i]) {
+      case 'b': if (!msg_isBang(m, i)) return false; break;
+      case 'f': if (!msg_isFloat(m, i)) return false; break;
+      case 'h': if (!msg_isHash(m, i)) return false; break;
+      case 's': if (!msg_isSymbol(m, i)) return false; break;
+      default: return false;
+    }
+  }
+  return (fmt[n] == '\0');
+}
+
+bool msg_compareSymbol(const HvMessage *m, int i, const char *s) {
+  switch (msg_getType(m,i)) {
+    case HV_MSG_SYMBOL: return !hv_strcmp(msg_getSymbol(m, i), s);
+    case HV_MSG_HASH: return (msg_getHash(m,i) == hv_string_to_hash(s));
+    default: return false;
+  }
+}
+
+bool msg_equalsElement(const HvMessage *m, int i_m, const HvMessage *n, int i_n) {
+  if (i_m < msg_getNumElements(m) && i_n < msg_getNumElements(n)) {
+    if (msg_getType(m, i_m) == msg_getType(n, i_n)) {
+      switch (msg_getType(m, i_m)) {
+        case HV_MSG_BANG: return true;
+        case HV_MSG_FLOAT: return (msg_getFloat(m, i_m) == msg_getFloat(n, i_n));
+        case HV_MSG_SYMBOL: return msg_compareSymbol(m, i_m, msg_getSymbol(n, i_n));
+        case HV_MSG_HASH: return msg_getHash(m,i_m) == msg_getHash(n,i_n);
+        default: break;
+      }
+    }
+  }
+  return false;
+}
+
+void msg_setElementToFrom(HvMessage *n, int i_n, const HvMessage *const m, int i_m) {
+  switch (msg_getType(m, i_m)) {
+    case HV_MSG_BANG: msg_setBang(n, i_n); break;
+    case HV_MSG_FLOAT: msg_setFloat(n, i_n, msg_getFloat(m, i_m)); break;
+    case HV_MSG_SYMBOL: msg_setSymbol(n, i_n, msg_getSymbol(m, i_m)); break;
+    case HV_MSG_HASH: msg_setHash(n, i_n, msg_getHash(m, i_m));
+    default: break;
+  }
+}
+
+hv_uint32_t msg_getHash(const HvMessage *const m, int i) {
+  hv_assert(i < msg_getNumElements(m)); // invalid index
+  switch (msg_getType(m,i)) {
+    case HV_MSG_BANG: return 0xFFFFFFFF;
+    case HV_MSG_FLOAT: {
+      float f = msg_getFloat(m,i);
+      return *((hv_uint32_t *) &f);
+    }
+    case HV_MSG_SYMBOL: return hv_string_to_hash(msg_getSymbol(m,i));
+    case HV_MSG_HASH: return (&(m->elem)+i)->data.h;
+    default: return 0;
+  }
+}
+
+char *msg_toString(const HvMessage *m) {
+  hv_assert(msg_getNumElements(m) > 0);
+  int *len = (int *) hv_alloca(msg_getNumElements(m)*sizeof(int));
+  int size = 0; // the total length of our final buffer
+
+  // loop through every element in our list of atoms
+  // first loop figures out how long our buffer should be
+  for (int i = 0; i < msg_getNumElements(m); i++) {
+    // length of our string is each atom plus a space, or \0 on the end
+    switch (msg_getType(m, i)) {
+      case HV_MSG_BANG: len[i] = hv_snprintf(NULL, 0, "%s", "bang") + 1; break;
+      case HV_MSG_FLOAT: len[i] = hv_snprintf(NULL, 0, "%g", msg_getFloat(m, i)) + 1; break;
+      case HV_MSG_SYMBOL: len[i] = hv_snprintf(NULL, 0, "%s", msg_getSymbol(m, i)) + 1; break;
+      case HV_MSG_HASH: len[i] = hv_snprintf(NULL, 0, "0x%X", msg_getHash(m, i)) + 1; break;
+      default: break;
+    }
+    size += len[i];
+  }
+
+  hv_assert(size > 0);
+
+  // now we do the piecewise concatenation into our final string
+  // the final buffer we will pass back after concatenating all strings - user should free it
+  char *finalString = (char *) hv_malloc(size*sizeof(char));
+  hv_assert(finalString != NULL);
+  int pos = 0;
+  for (int i = 0; i < msg_getNumElements(m); i++) {
+    // put a string representation of each atom into the final string
+    switch (msg_getType(m, i)) {
+      case HV_MSG_BANG: hv_snprintf(finalString+pos, len[i], "%s", "bang"); break;
+      case HV_MSG_FLOAT: hv_snprintf(finalString+pos, len[i], "%g", msg_getFloat(m, i)); break;
+      case HV_MSG_SYMBOL: hv_snprintf(finalString+pos, len[i], "%s", msg_getSymbol(m, i)); break;
+      case HV_MSG_HASH: hv_snprintf(finalString+pos, len[i], "0x%X", msg_getHash(m, i)); break;
+      default: break;
+    }
+    pos += len[i];
+    finalString[pos-1] = 32; // ASCII space
+  }
+  finalString[size-1] = '\0'; // ensure that the string is null terminated
+  return finalString;
+}

plugin/source/HvMessage.h

@@ -0,0 +1,183 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_MESSAGE_H_
+#define _HEAVY_MESSAGE_H_
+
+#include "HvUtils.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef enum ElementType {
+  HV_MSG_BANG = 0,
+  HV_MSG_FLOAT = 1,
+  HV_MSG_SYMBOL = 2,
+  HV_MSG_HASH = 3
+} ElementType;
+
+typedef struct Element {
+  ElementType type;
+  union {
+    float f; // float
+    const char *s; // symbol
+    hv_uint32_t h; // hash
+  } data;
+} Element;
+
+typedef struct HvMessage {
+  hv_uint32_t timestamp; // the sample at which this message should be processed
+  hv_uint16_t numElements;
+  hv_uint16_t numBytes; // the total number of bytes that this message occupies in memory, including strings
+  Element elem;
+} HvMessage;
+
+typedef struct ReceiverMessagePair {
+  hv_uint32_t receiverHash;
+  HvMessage msg;
+} ReceiverMessagePair;
+
+#define HV_MESSAGE_ON_STACK(_x) (HvMessage *) hv_alloca(msg_getCoreSize(_x))
+
+/** Returns the number of bytes that this message consumes in memory, not including strings. */
+static inline hv_size_t msg_getCoreSize(hv_size_t numElements) {
+  hv_assert(numElements > 0);
+  return sizeof(HvMessage) + ((numElements-1) * sizeof(Element));
+}
+
+HvMessage *msg_copy(const HvMessage *m);
+
+/** Copies the message into the given buffer. The buffer must be at least as large as msg_getNumHeapBytes(). */
+void msg_copyToBuffer(const HvMessage *m, char *buffer, hv_size_t len);
+
+void msg_setElementToFrom(HvMessage *n, int indexN, const HvMessage *const m, int indexM);
+
+/** Frees a message on the heap. Does nothing if argument is NULL. */
+void msg_free(HvMessage *m);
+
+HvMessage *msg_init(HvMessage *m, hv_size_t numElements, hv_uint32_t timestamp);
+
+HvMessage *msg_initWithFloat(HvMessage *m, hv_uint32_t timestamp, float f);
+
+HvMessage *msg_initWithBang(HvMessage *m, hv_uint32_t timestamp);
+
+HvMessage *msg_initWithSymbol(HvMessage *m, hv_uint32_t timestamp, const char *s);
+
+HvMessage *msg_initWithHash(HvMessage *m, hv_uint32_t timestamp, hv_uint32_t h);
+
+static inline hv_uint32_t msg_getTimestamp(const HvMessage *m) {
+  return m->timestamp;
+}
+
+static inline void msg_setTimestamp(HvMessage *m, hv_uint32_t timestamp) {
+  m->timestamp = timestamp;
+}
+
+static inline int msg_getNumElements(const HvMessage *m) {
+  return (int) m->numElements;
+}
+
+/** Returns the total number of bytes this message consumes in memory. */
+static inline hv_uint32_t msg_getSize(const HvMessage *m) {
+  return m->numBytes;
+}
+
+static inline ElementType msg_getType(const HvMessage *m, int index) {
+  hv_assert(index < msg_getNumElements(m)); // invalid index
+  return (&(m->elem)+index)->type;
+}
+
+static inline void msg_setBang(HvMessage *m, int index) {
+  hv_assert(index < msg_getNumElements(m)); // invalid index
+  (&(m->elem)+index)->type = HV_MSG_BANG;
+  (&(m->elem)+index)->data.s = NULL;
+}
+
+static inline bool msg_isBang(const HvMessage *m, int index) {
+  return (index < msg_getNumElements(m)) ? (msg_getType(m,index) == HV_MSG_BANG) : false;
+}
+
+static inline void msg_setFloat(HvMessage *m, int index, float f) {
+  hv_assert(index < msg_getNumElements(m)); // invalid index
+  (&(m->elem)+index)->type = HV_MSG_FLOAT;
+  (&(m->elem)+index)->data.f = f;
+}
+
+static inline float msg_getFloat(const HvMessage *const m, int index) {
+  hv_assert(index < msg_getNumElements(m)); // invalid index
+  return (&(m->elem)+index)->data.f;
+}
+
+static inline bool msg_isFloat(const HvMessage *const m, int index) {
+  return (index < msg_getNumElements(m)) ? (msg_getType(m,index) == HV_MSG_FLOAT) : false;
+}
+
+static inline void msg_setHash(HvMessage *m, int index, hv_uint32_t h) {
+  hv_assert(index < msg_getNumElements(m)); // invalid index
+  (&(m->elem)+index)->type = HV_MSG_HASH;
+  (&(m->elem)+index)->data.h = h;
+}
+
+static inline bool msg_isHash(const HvMessage *m, int index) {
+  return (index < msg_getNumElements(m)) ? (msg_getType(m, index) == HV_MSG_HASH) : false;
+}
+
+/** Returns true if the element is a hash or symbol. False otherwise. */
+static inline bool msg_isHashLike(const HvMessage *m, int index) {
+  return (index < msg_getNumElements(m)) ? ((msg_getType(m, index) == HV_MSG_HASH) || (msg_getType(m, index) == HV_MSG_SYMBOL)) : false;
+}
+
+/** Returns a 32-bit hash of the given element. */
+hv_uint32_t msg_getHash(const HvMessage *const m, int i);
+
+static inline void msg_setSymbol(HvMessage *m, int index, const char *s) {
+  hv_assert(index < msg_getNumElements(m)); // invalid index
+  hv_assert(s != NULL);
+  (&(m->elem)+index)->type = HV_MSG_SYMBOL;
+  (&(m->elem)+index)->data.s = s;
+  // NOTE(mhroth): if the same message container is reused and string reset,
+  // then the message size will be overcounted
+  m->numBytes += (hv_uint16_t) (hv_strlen(s) + 1); // also count '\0'
+}
+
+static inline const char *msg_getSymbol(const HvMessage *m, int index) {
+  hv_assert(index < msg_getNumElements(m)); // invalid index
+  return (&(m->elem)+index)->data.s;
+}
+
+static inline bool msg_isSymbol(const HvMessage *m, int index) {
+  return (index < msg_getNumElements(m)) ? (msg_getType(m, index) == HV_MSG_SYMBOL) : false;
+}
+
+bool msg_compareSymbol(const HvMessage *m, int i, const char *s);
+
+/** Returns 1 if the element i_m of message m is equal to element i_n of message n. */
+bool msg_equalsElement(const HvMessage *m, int i_m, const HvMessage *n, int i_n);
+
+bool msg_hasFormat(const HvMessage *m, const char *fmt);
+
+/**
+ * Create a string representation of the message. Suitable for use by the print object.
+ * The resulting string must be freed by the caller.
+ */
+char *msg_toString(const HvMessage *msg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _HEAVY_MESSAGE_H_

plugin/source/HvMessagePool.c

@@ -0,0 +1,144 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvMessagePool.h"
+#include "HvMessage.h"
+
+// the number of bytes reserved at a time from the pool
+#define MP_BLOCK_SIZE_BYTES 512
+
+#if HV_APPLE
+#pragma mark - MessageList
+#endif
+
+typedef struct MessageListNode {
+  char *p;
+  struct MessageListNode *next;
+} MessageListNode;
+
+static inline bool ml_hasAvailable(HvMessagePoolList *ml) {
+  return (ml->head != NULL);
+}
+
+static char *ml_pop(HvMessagePoolList *ml) {
+  MessageListNode *n = ml->head;
+  ml->head = n->next;
+  n->next = ml->pool;
+  ml->pool = n;
+  char *const p = n->p;
+  n->p = NULL; // set to NULL to make it clear that this node does not have a valid buffer
+  return p;
+}
+
+/** Push a MessageListNode with the given pointer onto the head of the queue. */
+static void ml_push(HvMessagePoolList *ml, void *p) {
+  MessageListNode *n = NULL;
+  if (ml->pool != NULL) {
+    // take an empty MessageListNode from the pool
+    n = ml->pool;
+    ml->pool = n->next;
+  } else {
+    // a MessageListNode is not available, allocate one
+    n = (MessageListNode *) hv_malloc(sizeof(MessageListNode));
+    hv_assert(n != NULL);
+  }
+  n->p = (char *) p;
+  n->next = ml->head;
+  ml->head = n; // push to the front of the queue
+}
+
+static void ml_free(HvMessagePoolList *ml) {
+  if (ml != NULL) {
+    while (ml_hasAvailable(ml)) {
+      ml_pop(ml);
+    }
+    while (ml->pool != NULL) {
+      MessageListNode *n = ml->pool;
+      ml->pool = n->next;
+      hv_free(n);
+    }
+  }
+}
+
+#if HV_APPLE
+#pragma mark - HvMessagePool
+#endif
+
+static hv_size_t mp_messagelistIndexForSize(hv_size_t byteSize) {
+  return (hv_size_t) hv_max_i((hv_min_max_log2((hv_uint32_t) byteSize) - 5), 0);
+}
+
+hv_size_t mp_init(HvMessagePool *mp, hv_size_t numKB) {
+  mp->bufferSize = numKB * 1024;
+  mp->buffer = (char *) hv_malloc(mp->bufferSize);
+  hv_assert(mp->buffer != NULL);
+  mp->bufferIndex = 0;
+
+  // initialise all message lists
+  for (int i = 0; i < MP_NUM_MESSAGE_LISTS; i++) {
+    mp->lists[i].head = NULL;
+    mp->lists[i].pool = NULL;
+  }
+
+  return mp->bufferSize;
+}
+
+void mp_free(HvMessagePool *mp) {
+  hv_free(mp->buffer);
+  for (int i = 0; i < MP_NUM_MESSAGE_LISTS; i++) {
+    ml_free(&mp->lists[i]);
+  }
+}
+
+void mp_freeMessage(HvMessagePool *mp, HvMessage *m) {
+  const hv_size_t b = msg_getSize(m); // the number of bytes that a message occupies in memory
+  const hv_size_t i = mp_messagelistIndexForSize(b); // the HvMessagePoolList index in the pool
+  HvMessagePoolList *ml = &mp->lists[i];
+  const hv_size_t chunkSize = 32 << i;
+  hv_memclear(m, chunkSize); // clear the chunk, just in case
+  ml_push(ml, m);
+}
+
+HvMessage *mp_addMessage(HvMessagePool *mp, const HvMessage *m) {
+  const hv_size_t b = msg_getSize(m);
+  // determine the message list index to allocate data from based on the msg size
+  // smallest chunk size is 32 bytes
+  const hv_size_t i = mp_messagelistIndexForSize(b);
+
+  hv_assert(i < MP_NUM_MESSAGE_LISTS); // how many chunk sizes do we want to support? 32, 64, 128, 256 at the moment
+  HvMessagePoolList *ml = &mp->lists[i];
+  const hv_size_t chunkSize = 32 << i;
+
+  if (ml_hasAvailable(ml)) {
+    char *buf = ml_pop(ml);
+    msg_copyToBuffer(m, buf, chunkSize);
+    return (HvMessage *) buf;
+  } else {
+    // if no appropriately sized buffer is immediately available, increase the size of the used buffer
+    const hv_size_t newIndex = mp->bufferIndex + MP_BLOCK_SIZE_BYTES;
+    hv_assert((newIndex <= mp->bufferSize) &&
+        "The message pool buffer size has been exceeded. The context cannot store more messages. "
+        "Try using the new_with_options() initialiser with a larger pool size (default is 10KB).");
+
+    for (hv_size_t j = mp->bufferIndex; j < newIndex; j += chunkSize) {
+      ml_push(ml, mp->buffer + j); // push new nodes onto the list with chunk pointers
+    }
+    mp->bufferIndex = newIndex;
+    char *buf = ml_pop(ml);
+    msg_copyToBuffer(m, buf, chunkSize);
+    return (HvMessage *) buf;
+  }
+}

plugin/source/HvMessagePool.h

@@ -0,0 +1,67 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _MESSAGE_POOL_H_
+#define _MESSAGE_POOL_H_
+
+#include "HvUtils.h"
+
+#define MP_NUM_MESSAGE_LISTS 4
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct HvMessagePoolList {
+  struct MessageListNode *head; // list of currently available blocks
+  struct MessageListNode *pool; // list of currently used blocks
+} HvMessagePoolList;
+
+typedef struct HvMessagePool {
+  char *buffer; // the buffer of all messages
+  hv_size_t bufferSize; // in bytes
+  hv_size_t bufferIndex; // the number of total reserved bytes
+
+  HvMessagePoolList lists[MP_NUM_MESSAGE_LISTS];
+} HvMessagePool;
+
+/**
+ * The HvMessagePool is a basic memory management system. It reserves a large block of memory at initialisation
+ * and proceeds to divide this block into smaller chunks (usually 512 bytes) as they are needed. These chunks are
+ * further divided into 32, 64, 128, or 256 sections. Each of these sections is managed by a HvMessagePoolList (MPL).
+ * An MPL is a linked-list data structure which is initialised such that its own pool of listnodes is filled with nodes
+ * that point at each subblock (e.g. each 32-byte block of a 512-block chunk).
+ *
+ * HvMessagePool is loosely inspired by TCMalloc. http://goog-perftools.sourceforge.net/doc/tcmalloc.html
+ */
+
+hv_size_t mp_init(struct HvMessagePool *mp, hv_size_t numKB);
+
+void mp_free(struct HvMessagePool *mp);
+
+/**
+ * Adds a message to the pool and returns a pointer to the copy. Returns NULL
+ * if no space was available in the pool.
+ */
+struct HvMessage *mp_addMessage(struct HvMessagePool *mp, const struct HvMessage *m);
+
+void mp_freeMessage(struct HvMessagePool *mp, struct HvMessage *m);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _MESSAGE_POOL_H_

plugin/source/HvMessageQueue.c

@@ -0,0 +1,215 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvMessageQueue.h"
+
+hv_size_t mq_initWithPoolSize(HvMessageQueue *q, hv_size_t poolSizeKB) {
+  hv_assert(poolSizeKB > 0);
+  q->head = NULL;
+  q->tail = NULL;
+  q->pool = NULL;
+  return mp_init(&q->mp, poolSizeKB);
+}
+
+void mq_free(HvMessageQueue *q) {
+  mq_clear(q);
+  while (q->pool != NULL) {
+    MessageNode *n = q->pool;
+    q->pool = q->pool->next;
+    hv_free(n);
+  }
+  mp_free(&q->mp);
+}
+
+static MessageNode *mq_getOrCreateNodeFromPool(HvMessageQueue *q) {
+  if (q->pool == NULL) {
+    // if necessary, create a new empty node
+    q->pool = (MessageNode *) hv_malloc(sizeof(MessageNode));
+    hv_assert(q->pool != NULL);
+    q->pool->next = NULL;
+  }
+  MessageNode *node = q->pool;
+  q->pool = q->pool->next;
+  return node;
+}
+
+int mq_size(HvMessageQueue *q) {
+  int size = 0;
+  MessageNode *n = q->head;
+  while (n != NULL) {
+    ++size;
+    n = n->next;
+  }
+  return size;
+}
+
+HvMessage *mq_addMessage(HvMessageQueue *q, const HvMessage *m, int let,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  MessageNode *node = mq_getOrCreateNodeFromPool(q);
+  node->m = mp_addMessage(&q->mp, m);
+  node->let = let;
+  node->sendMessage = sendMessage;
+  node->prev = NULL;
+  node->next = NULL;
+
+  if (q->tail != NULL) {
+    // the list already contains elements
+    q->tail->next = node;
+    node->prev = q->tail;
+    q->tail = node;
+  } else {
+    // the list is empty
+    node->prev = NULL;
+    q->head = node;
+    q->tail = node;
+  }
+  return mq_node_getMessage(node);
+}
+
+HvMessage *mq_addMessageByTimestamp(HvMessageQueue *q, const HvMessage *m, int let,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  if (mq_hasMessage(q)) {
+    MessageNode *n = mq_getOrCreateNodeFromPool(q);
+    n->m = mp_addMessage(&q->mp, m);
+    n->let = let;
+    n->sendMessage = sendMessage;
+
+    if (msg_getTimestamp(m) < msg_getTimestamp(q->head->m)) {
+      // the message occurs before the current head
+      n->next = q->head;
+      q->head->prev = n;
+      n->prev = NULL;
+      q->head = n;
+    } else if (msg_getTimestamp(m) >= msg_getTimestamp(q->tail->m)) {
+      // the message occurs after the current tail
+      n->next = NULL;
+      n->prev = q->tail;
+      q->tail->next = n;
+      q->tail = n;
+    } else {
+      // the message occurs somewhere between the head and tail
+      MessageNode *node = q->head;
+      while (node != NULL) {
+        if (msg_getTimestamp(m) < msg_getTimestamp(node->next->m)) {
+          MessageNode *r = node->next;
+          node->next = n;
+          n->next = r;
+          n->prev = node;
+          r->prev = n;
+          break;
+        }
+        node = node->next;
+      }
+    }
+    return n->m;
+  } else {
+    // add a message to the head
+    return mq_addMessage(q, m, let, sendMessage);
+  }
+}
+
+void mq_pop(HvMessageQueue *q) {
+  if (mq_hasMessage(q)) {
+    MessageNode *n = q->head;
+
+    mp_freeMessage(&q->mp, n->m);
+    n->m = NULL;
+
+    n->let = 0;
+    n->sendMessage = NULL;
+
+    q->head = n->next;
+    if (q->head == NULL) {
+      q->tail = NULL;
+    } else {
+      q->head->prev = NULL;
+    }
+    n->next = q->pool;
+    n->prev = NULL;
+    q->pool = n;
+  }
+}
+
+bool mq_removeMessage(HvMessageQueue *q, HvMessage *m, void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  if (mq_hasMessage(q)) {
+    if (mq_node_getMessage(q->head) == m) { // msg in head node
+      // only remove the message if sendMessage is the same as the stored one,
+      // if the sendMessage argument is NULL, it is not checked and will remove any matching message pointer
+      if (sendMessage == NULL || q->head->sendMessage == sendMessage) {
+        mq_pop(q);
+        return true;
+      }
+    } else {
+      MessageNode *prevNode = q->head;
+      MessageNode *currNode = q->head->next;
+      while ((currNode != NULL) && (currNode->m != m)) {
+        prevNode = currNode;
+        currNode = currNode->next;
+      }
+      if (currNode != NULL) {
+        if (sendMessage == NULL || currNode->sendMessage == sendMessage) {
+          mp_freeMessage(&q->mp, m);
+          currNode->m = NULL;
+          currNode->let = 0;
+          currNode->sendMessage = NULL;
+          if (currNode == q->tail) { // msg in tail node
+            prevNode->next = NULL;
+            q->tail = prevNode;
+          } else { // msg in middle node
+            prevNode->next = currNode->next;
+            currNode->next->prev = prevNode;
+          }
+          currNode->next = (q->pool == NULL) ? NULL : q->pool;
+          currNode->prev = NULL;
+          q->pool = currNode;
+          return true;
+        }
+      }
+    }
+  }
+  return false;
+}
+
+void mq_clear(HvMessageQueue *q) {
+  while (mq_hasMessage(q)) {
+    mq_pop(q);
+  }
+}
+
+void mq_clearAfter(HvMessageQueue *q, const hv_uint32_t timestamp) {
+  MessageNode *n = q->tail;
+  while (n != NULL && timestamp <= msg_getTimestamp(n->m)) {
+    // free the node's message
+    mp_freeMessage(&q->mp, n->m);
+    n->m = NULL;
+    n->let = 0;
+    n->sendMessage = NULL;
+
+    // the tail points at the previous node
+    q->tail = n->prev;
+
+    // put the node back in the pool
+    n->next = q->pool;
+    n->prev = NULL;
+    if (q->pool != NULL) q->pool->prev = n;
+    q->pool = n;
+
+    // update the tail node
+    n = q->tail;
+  }
+
+  if (q->tail == NULL) q->head = NULL;
+}

plugin/source/HvMessageQueue.h

@@ -0,0 +1,101 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _MESSAGE_QUEUE_H_
+#define _MESSAGE_QUEUE_H_
+
+#include "HvMessage.h"
+#include "HvMessagePool.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+class HeavyContextInterface;
+#else
+typedef struct HeavyContextInterface HeavyContextInterface;
+#endif
+
+typedef struct MessageNode {
+  struct MessageNode *prev; // doubly linked list
+  struct MessageNode *next;
+  HvMessage *m;
+  void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *);
+  int let;
+} MessageNode;
+
+/** A doubly linked list containing scheduled messages. */
+typedef struct HvMessageQueue {
+  MessageNode *head; // the head of the queue
+  MessageNode *tail; // the tail of the queue
+  MessageNode *pool; // the head of the reserve pool
+  HvMessagePool mp;
+} HvMessageQueue;
+
+hv_size_t mq_initWithPoolSize(HvMessageQueue *q, hv_size_t poolSizeKB);
+
+void mq_free(HvMessageQueue *q);
+
+int mq_size(HvMessageQueue *q);
+
+static inline HvMessage *mq_node_getMessage(MessageNode *n) {
+  return n->m;
+}
+
+static inline int mq_node_getLet(MessageNode *n) {
+  return n->let;
+}
+
+static inline bool mq_hasMessage(HvMessageQueue *q) {
+  return (q->head != NULL);
+}
+
+// true if there is a message and it occurs before (<) timestamp
+static inline bool mq_hasMessageBefore(HvMessageQueue *const q, const hv_uint32_t timestamp) {
+  return mq_hasMessage(q) && (msg_getTimestamp(mq_node_getMessage(q->head)) < timestamp);
+}
+
+static inline MessageNode *mq_peek(HvMessageQueue *q) {
+  return q->head;
+}
+
+/** Appends the message to the end of the queue. */
+HvMessage *mq_addMessage(HvMessageQueue *q, const HvMessage *m, int let,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+/** Insert in ascending order the message acccording to its timestamp. */
+HvMessage *mq_addMessageByTimestamp(HvMessageQueue *q, const HvMessage *m, int let,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+/** Pop the message at the head of the queue (and free its memory). */
+void mq_pop(HvMessageQueue *q);
+
+/** Remove a message from the queue (and free its memory) */
+bool mq_removeMessage(HvMessageQueue *q, HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+/** Clears (and frees) all messages in the queue. */
+void mq_clear(HvMessageQueue *q);
+
+/** Removes all messages occuring at or after the given timestamp. */
+void mq_clearAfter(HvMessageQueue *q, const hv_uint32_t timestamp);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // _MESSAGE_QUEUE_H_

plugin/source/HvTable.c

@@ -0,0 +1,110 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvTable.h"
+#include "HvMessage.h"
+
+hv_size_t hTable_init(HvTable *o, int length) {
+  o->length = length;
+  // true size of the table is always an integer multple of HV_N_SIMD
+  o->size = (length + HV_N_SIMD_MASK) & ~HV_N_SIMD_MASK;
+  // add an extra length for mirroring
+  o->allocated = o->size + HV_N_SIMD;
+  o->head = 0;
+  hv_size_t numBytes = o->allocated * sizeof(float);
+  o->buffer = (float *) hv_malloc(numBytes);
+  hv_assert(o->buffer != NULL);
+  hv_memclear(o->buffer, numBytes);
+  return numBytes;
+}
+
+hv_size_t hTable_initWithData(HvTable *o, int length, const float *data) {
+  o->length = length;
+  o->size = (length + HV_N_SIMD_MASK) & ~HV_N_SIMD_MASK;
+  o->allocated = o->size + HV_N_SIMD;
+  o->head = 0;
+  hv_size_t numBytes = o->size * sizeof(float);
+  o->buffer = (float *) hv_malloc(numBytes);
+  hv_assert(o->buffer != NULL);
+  hv_memclear(o->buffer, numBytes);
+  hv_memcpy(o->buffer, data, length*sizeof(float));
+  return numBytes;
+}
+
+hv_size_t hTable_initWithFinalData(HvTable *o, int length, float *data) {
+  o->length = length;
+  o->size = length;
+  o->allocated = length;
+  o->buffer = data;
+  o->head = 0;
+  return 0;
+}
+
+void hTable_free(HvTable *o) {
+  hv_free(o->buffer);
+}
+
+int hTable_resize(HvTable *o, hv_uint32_t newLength) {
+  // TODO(mhroth): update context with memory allocated by table
+  // NOTE(mhroth): mirrored bytes are not necessarily carried over
+  const hv_uint32_t newSize = (newLength + HV_N_SIMD_MASK) & ~HV_N_SIMD_MASK;
+  if (newSize == o->size) return 0; // early exit if no change in size
+  const hv_uint32_t oldSizeBytes = (hv_uint32_t) (o->size * sizeof(float));
+  const hv_uint32_t newAllocated = newSize + HV_N_SIMD;
+  const hv_uint32_t newAllocatedBytes = (hv_uint32_t) (newAllocated * sizeof(float));
+
+  float *b = (float *) hv_realloc(o->buffer, newAllocatedBytes);
+  hv_assert(b != NULL); // error while reallocing!
+  // ensure that hv_realloc has given us a correctly aligned buffer
+  if ((((hv_uintptr_t) (const void *) b) & ((0x1<<HV_N_SIMD)-1)) == 0) {
+    if (newSize > o->size) {
+      hv_memclear(b + o->size, (newAllocated - o->size) * sizeof(float)); // clear new parts of the buffer
+    }
+    o->buffer = b;
+  } else {
+    // if not, we have to re-malloc ourselves
+    char *c = (char *) hv_malloc(newAllocatedBytes);
+    hv_assert(c != NULL); // error while allocating new buffer!
+    if (newAllocatedBytes > oldSizeBytes) {
+      hv_memcpy(c, b, oldSizeBytes);
+      hv_memclear(c + oldSizeBytes, newAllocatedBytes - oldSizeBytes);
+    } else {
+      hv_memcpy(c, b, newAllocatedBytes);
+    }
+    hv_free(b);
+    o->buffer = (float *) c;
+  }
+  o->length = newLength;
+  o->size = newSize;
+  o->allocated = newAllocated;
+  return (int) (newAllocated - oldSizeBytes - (HV_N_SIMD*sizeof(float)));
+}
+
+void hTable_onMessage(HeavyContextInterface *_c, HvTable *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
+  if (msg_compareSymbol(m,0,"resize") && msg_isFloat(m,1) && msg_getFloat(m,1) >= 0.0f) {
+    hTable_resize(o, (int) hv_ceil_f(msg_getFloat(m,1))); // apply ceil to ensure that tables always have enough space
+
+    // send out the new size of the table
+    HvMessage *n = HV_MESSAGE_ON_STACK(1);
+    msg_initWithFloat(n, msg_getTimestamp(m), (float) hTable_getSize(o));
+    sendMessage(_c, 0, n);
+  }
+
+  else if (msg_compareSymbol(m,0,"mirror")) {
+    hv_memcpy(o->buffer+o->size, o->buffer, HV_N_SIMD*sizeof(float));
+  }
+}

plugin/source/HvTable.h

@@ -0,0 +1,88 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_TABLE_H_
+#define _HEAVY_TABLE_H_
+
+#include "HvHeavy.h"
+#include "HvUtils.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct HvTable {
+  float *buffer;
+  // the number of values that the table is requested to have
+  hv_uint32_t length;
+
+  // the number of usable values that the table actually has
+  // this is always an even multiple of HV_N_SIMD
+  hv_uint32_t size;
+
+  // Note that the true size of the table is (size + HV_N_SIMD),
+  // with the trailing values used by the system, e.g. to create a circular
+  // buffer
+  hv_uint32_t allocated;
+
+  hv_uint32_t head; // the most recently written point
+} HvTable;
+
+hv_size_t hTable_init(HvTable *o, int length);
+
+hv_size_t hTable_initWithData(HvTable *o, int length, const float *data);
+
+hv_size_t hTable_initWithFinalData(HvTable *o, int length, float *data);
+
+void hTable_free(HvTable *o);
+
+int hTable_resize(HvTable *o, hv_uint32_t newLength);
+
+void hTable_onMessage(HeavyContextInterface *_c, HvTable *o, int letIn, const HvMessage *m,
+    void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *));
+
+static inline float *hTable_getBuffer(HvTable *o) {
+  return o->buffer;
+}
+
+// the user-requested length of the table (number of floats)
+static inline hv_uint32_t hTable_getLength(HvTable *o) {
+  return o->length;
+}
+
+// the usable length of the table (an even multiple of HV_N_SIMD)
+static inline hv_uint32_t hTable_getSize(HvTable *o) {
+  return o->size;
+}
+
+// the number of floats allocated to this table (usually size + HV_N_SIMD)
+static inline hv_uint32_t hTable_getAllocated(HvTable *o) {
+  return o->allocated;
+}
+
+static inline hv_uint32_t hTable_getHead(HvTable *o) {
+  return o->head;
+}
+
+static inline void hTable_setHead(HvTable *o, hv_uint32_t head) {
+  o->head = head;
+}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // _HEAVY_TABLE_H_

plugin/source/HvUtils.c

@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "HvUtils.h"
+
+hv_uint32_t hv_string_to_hash(const char *str) {
+  // this hash is based MurmurHash2
+  // http://en.wikipedia.org/wiki/MurmurHash
+  // https://sites.google.com/site/murmurhash/
+  static const hv_uint32_t n = 0x5bd1e995;
+  static const hv_int32_t r = 24;
+
+  if (str == NULL) return 0;
+
+  hv_uint32_t len = (hv_uint32_t) hv_strlen(str);
+  hv_uint32_t x = len; // seed (0) ^ len
+
+  while (len >= 4) {
+#if HV_EMSCRIPTEN
+    hv_uint32_t k = str[0] | (str[1] << 8) | (str[2] << 16) | (str[3] << 24);
+#else
+    hv_uint32_t k = *((hv_uint32_t *) str);
+#endif
+    k *= n;
+    k ^= (k >> r);
+    k *= n;
+    x *= n;
+    x ^= k;
+    str += 4; len -= 4;
+  }
+  switch (len) {
+    case 3: x ^= (str[2] << 16);
+    case 2: x ^= (str[1] << 8);
+    case 1: x ^= str[0]; x *= n;
+    default: break;
+  }
+  x ^= (x >> 13);
+  x *= n;
+  x ^= (x >> 15);
+  return x;
+}

plugin/source/HvUtils.h

@@ -0,0 +1,320 @@
+/**
+ * Copyright (c) 2014-2018 Enzien Audio Ltd.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+ * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef _HEAVY_UTILS_H_
+#define _HEAVY_UTILS_H_
+
+// platform definitions
+#if _WIN32 || _WIN64
+  #define HV_WIN 1
+#ifdef _MSC_VER
+  #define HV_MSVC 1
+#endif
+#elif __APPLE__
+  #define HV_APPLE 1
+#elif __ANDROID__
+  #define HV_ANDROID 1
+#elif __unix__ || __unix
+  #define HV_UNIX 1
+#else
+  #warning Could not detect platform. Assuming Unix-like.
+#endif
+
+#ifdef EMSCRIPTEN
+#define HV_EMSCRIPTEN 1
+#endif
+
+// basic includes
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+// type definitions
+#include <stdint.h>
+#include <stdbool.h>
+#define hv_uint8_t uint8_t
+#define hv_int16_t int16_t
+#define hv_uint16_t uint16_t
+#define hv_int32_t int32_t
+#define hv_uint32_t uint32_t
+#define hv_uint64_t uint64_t
+#define hv_size_t size_t
+#define hv_uintptr_t uintptr_t
+
+// SIMD-specific includes
+#if !(HV_SIMD_NONE || HV_SIMD_NEON || HV_SIMD_SSE || HV_SIMD_AVX)
+  #define HV_SIMD_NEON __ARM_NEON__
+  #define HV_SIMD_SSE (__SSE__ && __SSE2__ && __SSE3__ && __SSSE3__ && __SSE4_1__)
+  #define HV_SIMD_AVX (__AVX__ && HV_SIMD_SSE)
+#endif
+#ifndef HV_SIMD_FMA
+  #define HV_SIMD_FMA __FMA__
+#endif
+
+#if HV_SIMD_AVX || HV_SIMD_SSE
+  #include <immintrin.h>
+#elif HV_SIMD_NEON
+  #include <arm_neon.h>
+#endif
+
+#if HV_SIMD_NEON // NEON
+  #define HV_N_SIMD 4
+  #define hv_bufferf_t float32x4_t
+  #define hv_bufferi_t int32x4_t
+  #define hv_bInf_t float32x4_t
+  #define hv_bOutf_t float32x4_t*
+  #define hv_bIni_t int32x4_t
+  #define hv_bOuti_t int32x4_t*
+  #define VIf(_x) (_x)
+  #define VOf(_x) (&_x)
+  #define VIi(_x) (_x)
+  #define VOi(_x) (&_x)
+#elif HV_SIMD_AVX // AVX
+  #define HV_N_SIMD 8
+  #define hv_bufferf_t __m256
+  #define hv_bufferi_t __m256i
+  #define hv_bInf_t __m256
+  #define hv_bOutf_t __m256*
+  #define hv_bIni_t __m256i
+  #define hv_bOuti_t __m256i*
+  #define VIf(_x) (_x)
+  #define VOf(_x) (&_x)
+  #define VIi(_x) (_x)
+  #define VOi(_x) (&_x)
+#elif HV_SIMD_SSE // SSE
+  #define HV_N_SIMD 4
+  #define hv_bufferf_t __m128
+  #define hv_bufferi_t __m128i
+  #define hv_bInf_t __m128
+  #define hv_bOutf_t __m128*
+  #define hv_bIni_t __m128i
+  #define hv_bOuti_t __m128i*
+  #define VIf(_x) (_x)
+  #define VOf(_x) (&_x)
+  #define VIi(_x) (_x)
+  #define VOi(_x) (&_x)
+#else // DEFAULT
+  #define HV_N_SIMD 1
+  #undef HV_SIMD_NONE
+  #define HV_SIMD_NONE 1
+  #define hv_bufferf_t float
+  #define hv_bufferi_t int
+  #define hv_bInf_t float
+  #define hv_bOutf_t float*
+  #define hv_bIni_t int
+  #define hv_bOuti_t int*
+  #define VIf(_x) (_x)
+  #define VOf(_x) (&_x)
+  #define VIi(_x) (_x)
+  #define VOi(_x) (&_x)
+#endif
+
+#define HV_N_SIMD_MASK (HV_N_SIMD-1)
+
+// Strings
+#include <string.h>
+#define hv_strlen(a) strlen(a)
+#define hv_strcmp(a, b) strcmp(a, b)
+#define hv_snprintf(a, b, c, ...) snprintf(a, b, c, __VA_ARGS__)
+#if HV_WIN
+#define hv_strncpy(_dst, _src, _len) strncpy_s(_dst, _len, _src, _TRUNCATE)
+#else
+#define hv_strncpy(_dst, _src, _len) strncpy(_dst, _src, _len)
+#endif
+
+// Memory management
+#define hv_memcpy(a, b, c) memcpy(a, b, c)
+#define hv_memclear(a, b) memset(a, 0, b)
+#if HV_MSVC
+  #include <malloc.h>
+  #define hv_alloca(_n) _alloca(_n)
+  #if HV_SIMD_AVX
+    #define hv_malloc(_n) _aligned_malloc(_n, 32)
+    #define hv_realloc(a, b) _aligned_realloc(a, b, 32)
+    #define hv_free(x) _aligned_free(x)
+  #elif HV_SIMD_SSE || HV_SIMD_NEON
+    #define hv_malloc(_n) _aligned_malloc(_n, 16)
+    #define hv_realloc(a, b) _aligned_realloc(a, b, 16)
+    #define hv_free(x) _aligned_free(x)
+  #else // HV_SIMD_NONE
+    #define hv_malloc(_n) malloc(_n)
+    #define hv_realloc(a, b) realloc(a, b)
+    #define hv_free(_n) free(_n)
+  #endif
+#elif HV_APPLE
+  #define hv_alloca(_n) alloca(_n)
+  #define hv_realloc(a, b) realloc(a, b)
+  #if HV_SIMD_AVX
+    #include <mm_malloc.h>
+    #define hv_malloc(_n) _mm_malloc(_n, 32)
+    #define hv_free(x) _mm_free(x)
+  #elif HV_SIMD_SSE
+    #include <mm_malloc.h>
+    #define hv_malloc(_n) _mm_malloc(_n, 16)
+    #define hv_free(x) _mm_free(x)
+  #elif HV_SIMD_NEON
+    // malloc on ios always has 16-byte alignment
+    #define hv_malloc(_n) malloc(_n)
+    #define hv_free(x) free(x)
+  #else // HV_SIMD_NONE
+    #define hv_malloc(_n) malloc(_n)
+    #define hv_free(x) free(x)
+  #endif
+#else
+  #include <alloca.h>
+  #define hv_alloca(_n) alloca(_n)
+  #define hv_realloc(a, b) realloc(a, b)
+  #if HV_SIMD_AVX
+    #define hv_malloc(_n) aligned_alloc(32, _n)
+    #define hv_free(x) free(x)
+  #elif HV_SIMD_SSE
+    #define hv_malloc(_n) aligned_alloc(16, _n)
+    #define hv_free(x) free(x)
+  #elif HV_SIMD_NEON
+    #if HV_ANDROID
+      #define hv_malloc(_n) memalign(16, _n)
+      #define hv_free(x) free(x)
+    #else
+      #define hv_malloc(_n) aligned_alloc(16, _n)
+      #define hv_free(x) free(x)
+    #endif
+  #else // HV_SIMD_NONE
+    #define hv_malloc(_n) malloc(_n)
+    #define hv_free(_n) free(_n)
+  #endif
+#endif
+
+// Assert
+#include <assert.h>
+#define hv_assert(e) assert(e)
+
+// Export and Inline
+#if HV_MSVC
+#define HV_EXPORT __declspec(dllexport)
+#define inline __inline
+#define HV_FORCE_INLINE __forceinline
+#else
+#define HV_EXPORT
+#define HV_FORCE_INLINE inline __attribute__((always_inline))
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+  // Returns a 32-bit hash of any string. Returns 0 if string is NULL.
+  hv_uint32_t hv_string_to_hash(const char *str);
+#ifdef __cplusplus
+}
+#endif
+
+// Math
+#include <math.h>
+static inline hv_size_t __hv_utils_max_ui(hv_size_t x, hv_size_t y) { return (x > y) ? x : y; }
+static inline hv_size_t __hv_utils_min_ui(hv_size_t x, hv_size_t y) { return (x < y) ? x : y; }
+static inline hv_int32_t __hv_utils_max_i(hv_int32_t x, hv_int32_t y) { return (x > y) ? x : y; }
+static inline hv_int32_t __hv_utils_min_i(hv_int32_t x, hv_int32_t y) { return (x < y) ? x : y; }
+#define hv_max_ui(a, b) __hv_utils_max_ui(a, b)
+#define hv_min_ui(a, b) __hv_utils_min_ui(a, b)
+#define hv_max_i(a, b) __hv_utils_max_i(a, b)
+#define hv_min_i(a, b) __hv_utils_min_i(a, b)
+#define hv_max_f(a, b) fmaxf(a, b)
+#define hv_min_f(a, b) fminf(a, b)
+#define hv_max_d(a, b) fmax(a, b)
+#define hv_min_d(a, b) fmin(a, b)
+#define hv_sin_f(a) sinf(a)
+#define hv_sinh_f(a) sinhf(a)
+#define hv_cos_f(a) cosf(a)
+#define hv_cosh_f(a) coshf(a)
+#define hv_tan_f(a) tanf(a)
+#define hv_tanh_f(a) tanhf(a)
+#define hv_asin_f(a) asinf(a)
+#define hv_asinh_f(a) asinhf(a)
+#define hv_acos_f(a) acosf(a)
+#define hv_acosh_f(a) acoshf(a)
+#define hv_atan_f(a) atanf(a)
+#define hv_atanh_f(a) atanhf(a)
+#define hv_atan2_f(a, b) atan2f(a, b)
+#define hv_exp_f(a) expf(a)
+#define hv_abs_f(a) fabsf(a)
+#define hv_sqrt_f(a) sqrtf(a)
+#define hv_log_f(a) logf(a)
+#define hv_ceil_f(a) ceilf(a)
+#define hv_floor_f(a) floorf(a)
+#define hv_round_f(a) roundf(a)
+#define hv_pow_f(a, b) powf(a, b)
+#if HV_EMSCRIPTEN
+#define hv_fma_f(a, b, c) ((a*b)+c) // emscripten does not support fmaf (yet?)
+#else
+#define hv_fma_f(a, b, c) fmaf(a, b, c)
+#endif
+#if HV_MSVC
+  // finds ceil(log2(x))
+  #include <intrin.h>
+  static inline hv_uint32_t __hv_utils_min_max_log2(hv_uint32_t x) {
+    unsigned long z = 0;
+    _BitScanReverse(&z, x);
+    return (hv_uint32_t) (z+1);
+  }
+#else
+  static inline hv_uint32_t __hv_utils_min_max_log2(hv_uint32_t x) {
+    return (hv_uint32_t) (32 - __builtin_clz(x-1));
+  }
+#endif
+#define hv_min_max_log2(a) __hv_utils_min_max_log2(a)
+
+// Atomics
+#if HV_WIN
+  #include <Windows.h>
+  #define hv_atomic_bool volatile LONG
+  #define HV_SPINLOCK_ACQUIRE(_x) while (InterlockedCompareExchange(&_x, true, false)) { }
+  #define HV_SPINLOCK_TRY(_x) return !InterlockedCompareExchange(&_x, true, false)
+  #define HV_SPINLOCK_RELEASE(_x) (_x = false)
+#elif HV_ANDROID
+  // Android support for atomics isn't that great, we'll do it manually
+  // https://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Atomic-Builtins.html
+  #define hv_atomic_bool hv_uint8_t
+  #define HV_SPINLOCK_ACQUIRE(_x) while (__sync_lock_test_and_set(&_x, 1))
+  #define HV_SPINLOCK_TRY(_x) return !__sync_lock_test_and_set(&_x, 1)
+  #define HV_SPINLOCK_RELEASE(_x) __sync_lock_release(&_x)
+#elif __cplusplus
+  #include <atomic>
+  #define hv_atomic_bool std::atomic_flag
+  #define HV_SPINLOCK_ACQUIRE(_x) while (_x.test_and_set(std::memory_order_acquire))
+  #define HV_SPINLOCK_TRY(_x) return !_x.test_and_set(std::memory_order_acquire)
+  #define HV_SPINLOCK_RELEASE(_x) _x.clear(std::memory_order_release)
+#elif defined(__has_include)
+  #if __has_include(<stdatomic.h>)
+    #include <stdatomic.h>
+    #define hv_atomic_bool atomic_flag
+    #define HV_SPINLOCK_ACQUIRE(_x) while (atomic_flag_test_and_set_explicit(&_x, memory_order_acquire))
+    #define HV_SPINLOCK_TRY(_x) return !atomic_flag_test_and_set_explicit(&_x, memory_order_acquire)
+    #define HV_SPINLOCK_RELEASE(_x) atomic_flag_clear_explicit(memory_order_release)
+  #endif
+#endif
+#ifndef hv_atomic_bool
+  #define hv_atomic_bool volatile bool
+  #define HV_SPINLOCK_ACQUIRE(_x) \
+  while (_x) {} \
+  _x = true;
+  #define HV_SPINLOCK_TRY(_x) \
+  if (!_x) { \
+    _x = true; \
+    return true; \
+  } else return false;
+  #define HV_SPINLOCK_RELEASE(_x) (_x = false)
+#endif
+
+#endif // _HEAVY_UTILS_H_

plugin/source/Makefile

@@ -0,0 +1,18 @@
+NAME = dpf_midi_thru
+
+FILES_DSP = $(wildcard *.cpp)
+FILES_DSP += $(wildcard *.c)
+
+include ../../dpf/Makefile.plugins.mk
+
+LINK_FLAGS += -lpthread
+CFLAGS += -Wno-unused-parameter
+CXXFLAGS += -Wno-unused-parameter
+
+
+	
+TARGETS += lv2_dsp
+	
+
+
+all: $(TARGETS)