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handle frequent psg updates

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This commit is contained in:
notaz 2017-09-30 22:55:57 +03:00
parent 5103774f6d
commit 5d638db094
4 changed files with 66 additions and 21 deletions
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44
pico/sound/sound.c
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@ -19,7 +19,7 @@ void (*PsndMix_32_to_16l)(short *dest, int *src, int count) = mix_32_to_16l_ster
// master int buffer to mix to
static int PsndBuffer[2*(44100+100)/50];
// dac
// dac, psg
static unsigned short dac_info[312+4]; // pos in sample buffer
// cdda output buffer
@ -30,7 +30,7 @@ int PsndRate=0;
int PsndLen=0; // number of mono samples, multiply by 2 for stereo
int PsndLen_exc_add=0; // this is for non-integer sample counts per line, eg. 22050/60
int PsndLen_exc_cnt=0;
int PsndDacLine=0;
int PsndDacLine, PsndPsgLine;
short *PsndOut=NULL; // PCM data buffer
static int PsndLen_use;
@ -158,7 +158,7 @@ PICO_INTERNAL void PsndStartFrame(void)
PsndLen_use++;
}
PsndDacLine = 0;
PsndDacLine = PsndPsgLine = 0;
emustatus &= ~1;
dac_info[224] = PsndLen_use;
}
@ -185,13 +185,42 @@ PICO_INTERNAL void PsndDoDAC(int line_to)
if (PicoOpt & POPT_EN_STEREO) {
short *d = PsndOut + pos*2;
for (; len > 0; len--, d+=2) *d = dout;
for (; len > 0; len--, d+=2) *d += dout;
} else {
short *d = PsndOut + pos;
for (; len > 0; len--, d++) *d = dout;
for (; len > 0; len--, d++) *d += dout;
}
}
PICO_INTERNAL void PsndDoPSG(int line_to)
{
int line_from = PsndPsgLine;
int pos, pos1, len;
int stereo = 0;
if (line_to >= 312)
line_to = 311;
pos = dac_info[line_from];
pos1 = dac_info[line_to + 1];
len = pos1 - pos;
//elprintf(EL_STATUS, "%3d %3d %3d %3d %3d",
// pos, pos1, len, line_from, line_to);
if (len <= 0)
return;
PsndPsgLine = line_to + 1;
if (!PsndOut || !(PicoOpt & POPT_EN_PSG))
return;
if (PicoOpt & POPT_EN_STEREO) {
stereo = 1;
pos <<= 1;
}
SN76496Update(PsndOut + pos, len, stereo);
}
// cdda
static void cdda_raw_update(int *buffer, int length)
{
@ -264,10 +293,6 @@ static int PsndRender(int offset, int length)
pprof_start(sound);
// PSG
if (PicoOpt & POPT_EN_PSG)
SN76496Update(PsndOut+offset, length, stereo);
if (PicoAHW & PAHW_PICO) {
PicoPicoPCMUpdate(PsndOut+offset, length, stereo);
return length;
@ -319,6 +344,7 @@ PICO_INTERNAL void PsndGetSamples(int y)
if (ym2612.dacen && PsndDacLine < y)
PsndDoDAC(y - 1);
PsndDoPSG(y - 1);
if (y == 224)
{