static uint32_t synthSound (B3S *instance, uint32_t written, uint32_t nframes, float **out) {
B3S* b3s = (B3S*)instance;
while (written < nframes) {
int nremain = nframes - written;
if (b3s->boffset >= BUFFER_SIZE_SAMPLES) {
b3s->boffset = 0;
oscGenerateFragment (instance->inst->synth, b3s->bufA, BUFFER_SIZE_SAMPLES);
preamp (instance->inst->preamp, b3s->bufA, b3s->bufB, BUFFER_SIZE_SAMPLES);
reverb (instance->inst->reverb, b3s->bufB, b3s->bufC, BUFFER_SIZE_SAMPLES);
#ifdef WITH_SIGNATURE
scramble (b3s, b3s->bufC, BUFFER_SIZE_SAMPLES);
#endif
whirlProc3(instance->inst->whirl, b3s->bufC, b3s->bufL[0], b3s->bufL[1], b3s->bufD[0], b3s->bufD[1], BUFFER_SIZE_SAMPLES);
}
int nread = MIN(nremain, (BUFFER_SIZE_SAMPLES - b3s->boffset));
memcpy(&out[0][written], &b3s->bufL[0][b3s->boffset], nread*sizeof(float));
memcpy(&out[1][written], &b3s->bufL[1][b3s->boffset], nread*sizeof(float));
written+=nread;
b3s->boffset+=nread;
}
return written;
}
int jack_audio_callback (jack_nframes_t nframes, void *arg) {
jack_default_audio_sample_t **out = j_output_bufferptrs;
int i;
void *jack_midi_buf = NULL;
int midi_events = 0;
jack_nframes_t midi_tme_proc = 0;
if (!synth_ready) {
for (i=0;i<AUDIO_CHANNELS;i++) {
out[i] = (jack_default_audio_sample_t*) jack_port_get_buffer (j_output_port[i], nframes);
memset(out[i], 0, nframes*sizeof(jack_default_audio_sample_t));
}
return (0);
}
if (use_jack_midi) {
jack_midi_buf = jack_port_get_buffer(jack_midi_port, nframes);
midi_events = jack_midi_get_event_count(jack_midi_buf);
}
for (i=0;i<AUDIO_CHANNELS;i++) {
out[i] = (jack_default_audio_sample_t*) jack_port_get_buffer (j_output_port[i], nframes);
}
static int boffset = BUFFER_SIZE_SAMPLES;
jack_nframes_t written = 0;
while (written < nframes) {
int nremain = nframes - written;
if (boffset >= BUFFER_SIZE_SAMPLES) {
if (use_jack_midi) {
for (i=0; i<midi_events; i++) {
jack_midi_event_t ev;
jack_midi_event_get(&ev, jack_midi_buf, i);
if (ev.time >= written && ev.time < (written + BUFFER_SIZE_SAMPLES))
parse_raw_midi_data(arg, ev.buffer, ev.size);
}
midi_tme_proc = written + BUFFER_SIZE_SAMPLES;
}
boffset = 0;
oscGenerateFragment (inst.synth, bufA, BUFFER_SIZE_SAMPLES);
preamp (inst.preamp, bufA, bufB, BUFFER_SIZE_SAMPLES);
reverb (inst.reverb, bufB, bufC, BUFFER_SIZE_SAMPLES);
#ifdef HAVE_ZITACONVOLVE
whirlProc2(inst.whirl,
bufC,
NULL, NULL,
bufH[0], bufH[1],
bufD[0], bufD[1],
BUFFER_SIZE_SAMPLES);
const float *horn[2] = { bufH[0], bufH[1] };
const float *drum[2] = { bufD[0], bufD[1] };
float *out[2] = { bufJ[0], bufJ[1] };
convolve(horn, out, 2, BUFFER_SIZE_SAMPLES);
mixdown(out, drum, AUDIO_CHANNELS, BUFFER_SIZE_SAMPLES);
#else
whirlProc(inst.whirl, bufC, bufJ[0], bufJ[1], BUFFER_SIZE_SAMPLES);
#endif
}
int nread = MIN(nremain, (BUFFER_SIZE_SAMPLES - boffset));
for (i=0;i< AUDIO_CHANNELS; i++) {
memcpy(&out[i][written], &bufJ[i][boffset], nread*sizeof(float));
}
written+=nread;
boffset+=nread;
}
if (use_jack_midi) {
/* process remaining MIDI events
* IF nframes < BUFFER_SIZE_SAMPLES OR nframes != N * BUFFER_SIZE_SAMPLES
*/
for (i=0; i<midi_events; i++) {
jack_midi_event_t ev;
jack_midi_event_get(&ev, jack_midi_buf, i);
if (ev.time >= midi_tme_proc)
parse_raw_midi_data(arg, ev.buffer, ev.size);
}
}
return(0);
}