93 lines
3.5 KiB
C
93 lines
3.5 KiB
C
/**
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* Copyright (c) 2014-2018 Enzien Audio Ltd.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "HvControlDelay.h"
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hv_size_t cDelay_init(HeavyContextInterface *_c, ControlDelay *o, float delayMs) {
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o->delay = hv_millisecondsToSamples(_c, delayMs);
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hv_memclear(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
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return 0;
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}
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void cDelay_onMessage(HeavyContextInterface *_c, ControlDelay *o, int letIn, const HvMessage *m,
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void (*sendMessage)(HeavyContextInterface *, int, const HvMessage *)) {
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switch (letIn) {
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case 0: {
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if (msg_compareSymbol(m, 0, "flush")) {
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// send all messages immediately
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for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
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HvMessage *n = o->msgs[i];
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if (n != NULL) {
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msg_setTimestamp(n, msg_getTimestamp(m)); // update the timestamp to now
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sendMessage(_c, 0, n); // send the message
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hv_cancelMessage(_c, n, sendMessage); // then clear it
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// NOTE(mhroth): there may be a problem here if a flushed message causes a clear message to return
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// to this object in the same step
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}
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}
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hv_memclear(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
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} else if (msg_compareSymbol(m, 0, "clear")) {
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// cancel (clear) all (pending) messages
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for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
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HvMessage *n = o->msgs[i];
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if (n != NULL) {
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hv_cancelMessage(_c, n, sendMessage);
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}
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}
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hv_memclear(o->msgs, __HV_DELAY_MAX_MESSAGES*sizeof(HvMessage *));
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} else {
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hv_uint32_t ts = msg_getTimestamp(m);
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msg_setTimestamp((HvMessage *) m, ts+o->delay); // update the timestamp to set the delay
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int i;
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for (i = 0; i < __HV_DELAY_MAX_MESSAGES; i++) {
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if (o->msgs[i] == NULL) {
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o->msgs[i] = hv_scheduleMessageForObject(_c, m, sendMessage, 0);
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break;
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}
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}
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hv_assert((i < __HV_DELAY_MAX_MESSAGES) && // scheduled message limit reached
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"[__delay] cannot track any more messages. Try increasing the size of __HV_DELAY_MAX_MESSAGES.");
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msg_setTimestamp((HvMessage *) m, ts); // return to the original timestamp
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}
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break;
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}
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case 1: {
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if (msg_isFloat(m,0)) {
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// set delay in milliseconds (cannot be negative!)
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o->delay = hv_millisecondsToSamples(_c, msg_getFloat(m,0));
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}
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break;
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}
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case 2: {
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if (msg_isFloat(m,0)) {
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// set delay in samples (cannot be negative!)
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o->delay = (hv_uint32_t) hv_max_f(0.0f, msg_getFloat(m,0));
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}
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break;
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}
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default: break;
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}
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}
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void cDelay_clearExecutingMessage(ControlDelay *o, const HvMessage *m) {
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for (int i = 0; i < __HV_DELAY_MAX_MESSAGES; ++i) {
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if (o->msgs[i] == m) {
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o->msgs[i] = NULL;
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break;
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}
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}
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}
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