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sound code rewrite for lower sample rates (except mp3s)

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@30 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-02-06 22:25:53 +00:00
parent 1cd356a33d
commit 7a93adeb29
9 changed files with 98 additions and 108 deletions
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19
Pico/Pico.c
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@ -18,7 +18,7 @@ int PicoSkipFrame=0; // skip rendering frame?
int PicoRegionOverride = 0; // override the region detection 0: Auto, 1: Japan NTSC, 2: Japan PAL, 4: US, 8: Europe
int PicoAutoRgnOrder = 0;
int emustatus = 0;
void (*PicoWriteSound)(void) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware
void (*PicoWriteSound)(int len) = 0; // called once per frame at the best time to send sound buffer (PsndOut) to hardware
struct PicoSRAM SRam;
int z80startCycle = 0, z80stopCycle = 0; // in 68k cycles
@ -315,21 +315,22 @@ static int CheckIdle(void)
// to be called on 224 or line_sample scanlines only
static __inline void getSamples(int y)
{
static int curr_pos = 0;
if(y == 224) {
//dprintf("sta%i: %i [%i]", (emustatus & 2), emustatus, y);
if(emustatus & 2)
sound_render(PsndLen/2, PsndLen-PsndLen/2);
else sound_render(0, PsndLen);
curr_pos += sound_render(curr_pos, PsndLen-PsndLen/2);
else curr_pos = sound_render(0, PsndLen);
if (emustatus&1) emustatus|=2; else emustatus&=~2;
if (PicoWriteSound) PicoWriteSound();
if (PicoWriteSound) PicoWriteSound(curr_pos);
// clear sound buffer
sound_clear();
//memset(PsndOut, 0, (PicoOpt & 8) ? (PsndLen<<2) : (PsndLen<<1));
}
else if(emustatus & 3) {
emustatus|= 2;
emustatus&=~1;
sound_render(0, PsndLen/2);
curr_pos = sound_render(0, PsndLen/2);
}
}
@ -538,10 +539,10 @@ static int PicoFrameSimple(void)
// here we render sound if ym2612 is disabled
if(!(PicoOpt&1) && PsndOut) {
sound_render(0, PsndLen);
if(PicoWriteSound) PicoWriteSound();
int len = sound_render(0, PsndLen);
if(PicoWriteSound) PicoWriteSound(len);
// clear sound buffer
memset(PsndOut, 0, (PicoOpt & 8) ? (PsndLen<<2) : (PsndLen<<1));
sound_clear();
}
// render screen