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psp snd output improved

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@288 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-11-01 09:39:56 +00:00
parent d0ae0cb4bb
commit 88b3d7c16a
3 changed files with 29 additions and 16 deletions
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28
platform/psp/emu.c
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@ -469,8 +469,8 @@ static void vidResetMode(void)
/* sound stuff */
#define SOUND_BLOCK_SIZE_NTSC (2940*2) // 1024 // 1152
#define SOUND_BLOCK_SIZE_PAL (3528*2)
#define SOUND_BLOCK_SIZE_NTSC (1470*2) // 1024 // 1152
#define SOUND_BLOCK_SIZE_PAL (1764*2)
#define SOUND_BLOCK_COUNT 4
static short __attribute__((aligned(4))) sndBuffer[SOUND_BLOCK_SIZE_PAL*SOUND_BLOCK_COUNT + 44100/50*2];
@ -490,9 +490,10 @@ static int sound_thread(SceSize args, void *argp)
while (!sound_thread_exit)
{
if (samples_made - samples_done < samples_block) {
// wait for data...
//lprintf("sthr: wait... (%i/%i)\n", samples_done, samples_made);
ret = sceKernelWaitSema(sound_sem, 1, 0);
// wait for data (use at least 2 blocks)
//lprintf("sthr: wait... (%i)\n", samples_made - samples_done);
while (samples_made - samples_done <= samples_block*2 && !sound_thread_exit)
ret = sceKernelWaitSema(sound_sem, 1, 0);
//lprintf("sthr: sceKernelWaitSema: %i\n", ret);
continue;
}
@ -507,6 +508,14 @@ static int sound_thread(SceSize args, void *argp)
snd_playptr = sndBuffer;
if (ret)
lprintf("sthr: outf: %i; pos %i/%i\n", ret, samples_done, samples_made);
// shouln't happen, but just in case
if (samples_made - samples_done >= samples_block*3) {
//lprintf("block skip (%i)\n", samples_made - samples_done);
samples_done += samples_block; // skip
snd_playptr += samples_block;
}
}
lprintf("sthr: exit\n");
@ -546,8 +555,7 @@ static void sound_prepare(void)
stereo=(PicoOpt&8)>>3;
samples_block = Pico.m.pal ? SOUND_BLOCK_SIZE_PAL : SOUND_BLOCK_SIZE_NTSC;
if (PsndRate == 22050) samples_block /= 2;
else if (PsndRate == 11025) samples_block /= 4;
if (PsndRate <= 22050) samples_block /= 2;
sndBuffer_endptr = &sndBuffer[samples_block*SOUND_BLOCK_COUNT];
lprintf("starting audio: %i, len: %i, stereo: %i, pal: %i, block samples: %i\n",
@ -606,7 +614,7 @@ static void writeSound(int len)
// signal the snd thread
samples_made += len;
if (samples_made - samples_done >= samples_block) {
if (samples_made - samples_done > samples_block*2) {
// lprintf("signal, %i/%i\n", samples_done, samples_made);
ret = sceKernelSignalSema(sound_sem, 1);
// lprintf("signal ret %i\n", ret);
@ -938,12 +946,10 @@ void emu_Loop(void)
int tval_diff;
tval = sceKernelGetSystemTimeLow();
tval_diff = (int)(tval - tval_thissec) << 8;
if (tval_diff > lim_time)
if (tval_diff > lim_time && (frames_done/16 < frames_shown))
{
// no time left for this frame - skip
if (tval_diff - lim_time >= (300000<<8)) {
/* something caused a slowdown for us (disk access? cache flush?)
* try to recover by resetting timing... */
reset_timing = 1;
continue;
}