// frame callback
void module_process_frame(void) {
calc_frame();
// we could shift to fract16 at a cost of only 1b resolution
/*
slew32_calc(cvSlew[cvChan]);
if( !(slew32_sync(cvSlew[cvChan])) ) {
dac_update(cvChan, cvSlew[cvChan].y );
}
*/
// something really weird going on, reverting
if(cvSlew[cvChan].sync) { ;; } else {
cvVal[cvChan] = filter_1p_lo_next(&(cvSlew[cvChan]));
dac_update(cvChan, cvVal[cvChan]);
}
if(++cvChan == 4) {
cvChan = 0;
}
/* dac_update(cvChan, cvSlew[cvChan].x); */
/* cvChan++; */
/* if(cvChan == 4) { cvChan = 0; } */
// cvChan = (cvChan + 1) & 3;
}
void
system_sound_update(int nframes)
{
int i;
int consumed;
/* SDL_LockAudio(); */
/* number of unread frames */
i = FRAME_DIFF(sound_frame_write, sound_frame_read);
/* number of frames read since last call */
consumed = FRAME_DIFF(sound_frame_read, sound_frame_read_old);
sound_frame_read_old = sound_frame_read;
/* SDL_UnlockAudio(); */
for (; i<nframes; i++) {
if (mute || paused)
memset(sound_buffer+sound_frame_write, silence_value, bpf);
else {
dac_update(dac_data, dac_bpf);
/* convert to standard format */
acvt.buf = dac_data;
acvt.len = dac_bpf;
if (SDL_ConvertAudio(&acvt) == -1) {
fprintf(stderr,
"DAC data conversion failed: %s\n", SDL_GetError());
return;
}
/* get sound data */
sound_update((_u16 *)(sound_buffer+sound_frame_write), bpf);
/* mix both streams into one */
SDL_MixAudio(sound_buffer+sound_frame_write,
dac_data, bpf, SDL_MIX_MAXVOLUME);
}
sound_frame_write = FRAME_INC(sound_frame_write);
if (sound_frame_write == sound_frame_read) {
fprintf(stderr, "your machine is much too slow.\n");
/* XXX: handle this */
exit(1);
}
SDL_SemPost(rsem);
}
if (nframes > 1) {
for (i=0; i<consumed; i++)
SDL_SemWait(wsem);
}
else
SDL_SemWait(wsem);
}
void module_process_frame(void) {
static fract32 tmpDel, tmpSvf;
u8 i;
tmpDel = 0;
tmpSvf = 0;
// mix inputs to delay lines
mix_del_inputs();
/// TEST
for(i=0; i<NLINES; i++) {
// process fade integrator
// lines[i].fadeWr = filter_ramp_tog_next(&(lpFadeWr[i]));
lines[i].fadeRd = filter_ramp_tog_next(&(lpFadeRd[i]));
// process delay line
tmpDel = delayFadeN_next( &(lines[i]), in_del[i]);
// process filters
// check integrators for filter params
if( !(svfCutSlew[i].sync) ) {
filter_svf_set_coeff( &(svf[i]), filter_1p_lo_next(&(svfCutSlew[i])) );
}
if( !(svfRqSlew[i].sync) ) {
filter_svf_set_rq( &(svf[i]), filter_1p_lo_next(&(svfRqSlew[i])) );
}
tmpSvf = filter_svf_next( &(svf[i]), tmpDel);
// mix
tmpDel = mult_fr1x32x32( tmpDel, mix_fdry[i] );
tmpDel = add_fr1x32(tmpDel, mult_fr1x32x32(tmpSvf, mix_fwet[i]) );
out_del[i] = tmpDel;
} // end lines loop
// mix outputs to DACs
/// TEST
/* out[0] = in[0]; */
/* out[1] = in[1]; */
/* out[2] = in[2]; */
/* out[3] = in[3]; */
out[0] = out[1] = out[2] = out[3] = 0x00000000;
mix_outputs();
/// do CV output
if( cvSlew[cvChan].sync ) { ;; } else {
cvVal[cvChan] = filter_1p_lo_next(&(cvSlew[cvChan]));
dac_update(cvChan, cvVal[cvChan]);
}
if(++cvChan == 4) {
cvChan = 0;
}
}
// frame callback
void module_process_frame(void) {
calc_frame();
/* out[0] = add_fr1x32(frameVal, mult_fr1x32x32(in[0], ioAmp0)); */
/* out[1] = add_fr1x32(frameVal, mult_fr1x32x32(in[1], ioAmp1)); */
/* out[2] = add_fr1x32(frameVal, mult_fr1x32x32(in[2], ioAmp2)); */
/* out[3] = add_fr1x32(frameVal, mult_fr1x32x32(in[3], ioAmp3)); */
if(cvSlew[cvChan].sync) { ;; } else {
cvVal[cvChan] = filter_1p_lo_next(&(cvSlew[cvChan]));
dac_update(cvChan, cvVal[cvChan]);
}
if(++cvChan == 4) {
cvChan = 0;
}
}
