ref: 31e92f8d774d118b58da740b15eae6304b2d94c0
parent: e86d986ed6ccb93b4ee41d2de656c49c721b18db
author: Ellie <el@horse64.org>
date: Sun Nov 14 21:26:03 EST 2021
Kill off voices in release segment when at max voices
--- a/tsf.h
+++ b/tsf.h
@@ -882,6 +882,11 @@
return 1;
}
+static int tsf_voice_envelope_release_samples(
+ struct tsf_voice_envelope* e, float outSampleRate) {
+ return (int)((e->parameters.release <= 0 ? TSF_FASTRELEASETIME : e->parameters.release) * outSampleRate);
+}
+
static void tsf_voice_envelope_nextsegment(struct tsf_voice_envelope* e, short active_segment, float outSampleRate)
{
switch (active_segment)
@@ -964,7 +969,7 @@
return;
case TSF_SEGMENT_SUSTAIN:
e->segment = TSF_SEGMENT_RELEASE;
- e->samplesUntilNextSegment = (int)((e->parameters.release <= 0 ? TSF_FASTRELEASETIME : e->parameters.release) * outSampleRate);
+ e->samplesUntilNextSegment = tsf_voice_envelope_release_samples(e, outSampleRate);
if (e->isAmpEnv)
{
// I don't truly understand this; just following what LinuxSampler does.
@@ -1448,15 +1453,40 @@
struct tsf_voice* newVoices;
if (f->maxVoiceNum)
{
- // voices have been pre-allocated and limited to a maximum, unable to start playing this voice
- continue;
+ // Voices have been pre-allocated and limited to a maximum.
+ // Try to kill a voice off in its release envelope:
+ int bestKillReleaseSamplePos = 0;
+ struct tsf_voice *bestKill = NULL;
+ v = f->voices;
+ for (; v != vEnd; v++) {
+ if (v->ampenv.segment == TSF_SEGMENT_RELEASE) {
+ int releaseSamplesDone = tsf_voice_envelope_release_samples(
+ &v->ampenv, f->outSampleRate
+ ) - v->ampenv.samplesUntilNextSegment;
+ if (bestKill != NULL && releaseSamplesDone <= bestKillReleaseSamplePos)
+ {
+ continue;
+ }
+ // We're looking for the voice furthest into its release:
+ bestKill = v;
+ bestKillReleaseSamplePos = releaseSamplesDone;
+ }
+ }
+ if (bestKill) {
+ tsf_voice_kill(bestKill);
+ voice = bestKill;
+ }
+ if (!voice)
+ continue;
+ } else {
+ // Allocate more voices so we don't need to kill one off.
+ f->voiceNum += 4;
+ newVoices = (struct tsf_voice*)TSF_REALLOC(f->voices, f->voiceNum * sizeof(struct tsf_voice));
+ if (!newVoices) return 0;
+ f->voices = newVoices;
+ voice = &f->voices[f->voiceNum - 4];
+ voice[1].playingPreset = voice[2].playingPreset = voice[3].playingPreset = -1;
}
- f->voiceNum += 4;
- newVoices = (struct tsf_voice*)TSF_REALLOC(f->voices, f->voiceNum * sizeof(struct tsf_voice));
- if (!newVoices) return 0;
- f->voices = newVoices;
- voice = &f->voices[f->voiceNum - 4];
- voice[1].playingPreset = voice[2].playingPreset = voice[3].playingPreset = -1;
}
voice->region = region;