example_hvcc2dpf/distrho/source/HvControlDelay.c
2021-03-23 22:07:32 +01:00

93 lines
3.5 KiB
C

/**
* 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 "HvControlDelay.h"
hv_size_t cDelay_init(HeavyContextInterface *_c, ControlDelay *o, float delayMs) {
o->delay = hv_millisecondsToSamples(_c, delayMs);
hv_memclear(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
return 0;
}
void cDelay_onMessage(HeavyContextInterface *_c, ControlDelay *o, int letIn, const HvMessage *m,
void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
switch (letIn) {
case 0: {
if (msg_compareSymbol(m, 0, "flush")) {
// send all messages immediately
for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
HvMessage *n = o->msgs[i];
if (n != NULL) {
msg_setTimestamp(n, msg_getTimestamp(m)); // update the timestamp to now
sendMessage(_c, 0, n); // send the message
hv_cancelMessage(_c, n, sendMessage); // then clear it
// NOTE(mhroth): there may be a problem here if a flushed message causes a clear message to return
// to this object in the same step
}
}
hv_memclear(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
} else if (msg_compareSymbol(m, 0, "clear")) {
// cancel (clear) all (pending) messages
for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
HvMessage *n = o->msgs[i];
if (n != NULL) {
hv_cancelMessage(_c, n, sendMessage);
}
}
hv_memclear(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
} else {
hv_uint32_t ts = msg_getTimestamp(m);
msg_setTimestamp((HvMessage *) m, ts+o->delay); // update the timestamp to set the delay
int i;
for (i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
if (o->msgs[i] == NULL) {
o->msgs[i] = hv_scheduleMessageForObject(_c, m, sendMessage, 0);
break;
}
}
hv_assert((i < __HV_DELAY_MAX_MESSAGES) && // scheduled message limit reached
"[__delay] cannot track any more messages. Try increasing the size of __HV_DELAY_MAX_MESSAGES.");
msg_setTimestamp((HvMessage *) m, ts); // return to the original timestamp
}
break;
}
case 1: {
if (msg_isFloat(m,0)) {
// set delay in milliseconds (cannot be negative!)
o->delay = hv_millisecondsToSamples(_c, msg_getFloat(m,0));
}
break;
}
case 2: {
if (msg_isFloat(m,0)) {
// set delay in samples (cannot be negative!)
o->delay = (hv_uint32_t) hv_max_f(0.0f, msg_getFloat(m,0));
}
break;
}
default: break;
}
}
void cDelay_clearExecutingMessage(ControlDelay *o, const HvMessage *m) {
for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; ++i) {
if (o->msgs[i] == m) {
o->msgs[i] = NULL;
break;
}
}
}