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sound, fix pcm/pwm handling wrt fast forward (mcd, 32x, pico)

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This commit is contained in:
kub 2022-02-07 21:08:34 +00:00
parent 8eada9d64c
commit 9f1d5acdb4
5 changed files with 35 additions and 19 deletions
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41
pico/sound/sound.c
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@ -130,6 +130,9 @@ PICO_INTERNAL void PsndDoDAC(int cyc_to)
int pos, len;
int dout = ym2612.dacout;
// nothing to do if sound is off
if (!PicoIn.sndOut) return;
// number of samples to fill in buffer (Q20)
len = (cyc_to * Pico.snd.clkl_mult) - Pico.snd.dac_pos;
@ -169,6 +172,9 @@ PICO_INTERNAL void PsndDoPSG(int cyc_to)
int pos, len;
int stereo = 0;
// nothing to do if sound is off
if (!PicoIn.sndOut) return;
// number of samples to fill in buffer (Q20)
len = (cyc_to * Pico.snd.clkl_mult) - Pico.snd.psg_pos;
@ -196,6 +202,9 @@ PICO_INTERNAL void PsndDoYM2413(int cyc_to)
int stereo = 0;
short *buf;
// nothing to do if sound is off
if (!PicoIn.sndOut) return;
// number of samples to fill in buffer (Q20)
len = (cyc_to * Pico.snd.clkl_mult) - Pico.snd.ym2413_pos;
@ -236,6 +245,9 @@ PICO_INTERNAL void PsndDoFM(int cyc_to)
int pos, len;
int stereo = 0;
// nothing to do if sound is off
if (!PicoIn.sndOut) return;
// Q20, number of samples since last call
len = (cyc_to * Pico.snd.clkl_mult) - Pico.snd.fm_pos;
@ -306,6 +318,11 @@ PICO_INTERNAL void PsndClear(void)
{
int len = Pico.snd.len;
if (Pico.snd.len_e_add) len++;
// drop pos remainder to avoid rounding errors (not entirely correct though)
Pico.snd.dac_pos = Pico.snd.fm_pos = Pico.snd.psg_pos = Pico.snd.ym2413_pos = 0;
if (!PicoIn.sndOut) return;
if (PicoIn.opt & POPT_EN_STEREO)
memset32((int *) PicoIn.sndOut, 0, len); // assume PicoIn.sndOut to be aligned
else {
@ -316,14 +333,12 @@ PICO_INTERNAL void PsndClear(void)
}
if (!(PicoIn.opt & POPT_EN_FM))
memset32(PsndBuffer, 0, PicoIn.opt & POPT_EN_STEREO ? len*2 : len);
// drop pos remainder to avoid rounding errors (not entirely correct though)
Pico.snd.dac_pos = Pico.snd.fm_pos = Pico.snd.psg_pos = Pico.snd.ym2413_pos = 0;
}
static int PsndRender(int offset, int length)
{
int *buf32;
s32 *buf32;
int stereo = (PicoIn.opt & 8) >> 3;
int fmlen = ((Pico.snd.fm_pos+0x80000) >> 20);
int daclen = ((Pico.snd.dac_pos+0x80000) >> 20);
@ -334,12 +349,14 @@ static int PsndRender(int offset, int length)
pprof_start(sound);
if (PicoIn.AHW & PAHW_PICO) {
PicoPicoPCMUpdate(PicoIn.sndOut+(offset<<stereo), length-offset, stereo);
// XXX ugly hack, need to render sound for interrupts
s16 *buf16 = PicoIn.sndOut ? PicoIn.sndOut : (short *)PsndBuffer;
PicoPicoPCMUpdate(buf16+(offset<<stereo), length-offset, stereo);
return length;
}
// Fill up DAC output in case of missing samples (Q rounding errors)
if (length-daclen > 0) {
if (length-daclen > 0 && PicoIn.sndOut) {
short *dacbuf = PicoIn.sndOut + (daclen << stereo);
Pico.snd.dac_pos += (length-daclen) << 20;
*dacbuf++ += Pico.snd.dac_val2;
@ -352,7 +369,7 @@ static int PsndRender(int offset, int length)
}
// Add in parts of the PSG output not yet done
if (length-psglen > 0) {
if (length-psglen > 0 && PicoIn.sndOut) {
short *psgbuf = PicoIn.sndOut + (psglen << stereo);
Pico.snd.psg_pos += (length-psglen) << 20;
if (PicoIn.opt & POPT_EN_PSG)
@ -360,7 +377,7 @@ static int PsndRender(int offset, int length)
}
// Add in parts of the FM buffer not yet done
if (length-fmlen > 0) {
if (length-fmlen > 0 && PicoIn.sndOut) {
int *fmbuf = buf32 + ((fmlen-offset) << stereo);
Pico.snd.fm_pos += (length-fmlen) << 20;
if (PicoIn.opt & POPT_EN_FM)
@ -389,7 +406,8 @@ static int PsndRender(int offset, int length)
p32x_pwm_update(buf32, length-offset, stereo);
// convert + limit to normal 16bit output
PsndMix_32_to_16l(PicoIn.sndOut+(offset<<stereo), buf32, length-offset);
if (PicoIn.sndOut)
PsndMix_32_to_16l(PicoIn.sndOut+(offset<<stereo), buf32, length-offset);
pprof_end(sound);
@ -402,7 +420,7 @@ PICO_INTERNAL void PsndGetSamples(int y)
curr_pos = PsndRender(0, Pico.snd.len_use);
if (PicoIn.writeSound)
if (PicoIn.writeSound && PicoIn.sndOut)
PicoIn.writeSound(curr_pos * ((PicoIn.opt & POPT_EN_STEREO) ? 4 : 2));
// clear sound buffer
PsndClear();
@ -414,6 +432,9 @@ static int PsndRenderMS(int offset, int length)
int psglen = ((Pico.snd.psg_pos+0x80000) >> 20);
int ym2413len = ((Pico.snd.ym2413_pos+0x80000) >> 20);
if (!PicoIn.sndOut)
return length;
pprof_start(sound);
// Add in parts of the PSG output not yet done
@ -456,7 +477,7 @@ PICO_INTERNAL void PsndGetSamplesMS(int y)
curr_pos = PsndRenderMS(0, Pico.snd.len_use);
if (PicoIn.writeSound != NULL)
if (PicoIn.writeSound != NULL && PicoIn.sndOut)
PicoIn.writeSound(curr_pos * ((PicoIn.opt & POPT_EN_STEREO) ? 4 : 2));
PsndClear();
}