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oss code refactoring, sound for frame unlim mode

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@735 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2009-08-05 22:29:46 +00:00
parent 730259b7bb
commit b08ccf71d5
4 changed files with 80 additions and 40 deletions
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35
platform/gp2x/emu.c
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@ -590,12 +590,16 @@ void plat_update_volume(int has_changed, int is_up)
static void updateSound(int len)
{
len <<= 1;
if (PicoOpt & POPT_EN_STEREO)
len <<= 1;
if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))
return;
/* avoid writing audio when lagging behind to prevent audio lag */
if (PicoSkipFrame != 2)
sndout_oss_write(PsndOut, len<<1);
sndout_oss_write(PsndOut, len);
}
void pemu_sound_start(void)
@ -609,31 +613,40 @@ void pemu_sound_start(void)
{
int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;
int target_fps = Pico.m.pal ? 50 : 60;
int snd_excess_add;
int frame_samples, snd_excess_add;
gp2x_soc_t soc;
soc = soc_detect();
#define SOUND_RERATE_FLAGS (POPT_EN_FM|POPT_EN_PSG|POPT_EN_STEREO|POPT_EXT_FM|POPT_EN_MCD_CDDA)
if (PsndRate != PsndRate_old || Pico.m.pal != pal_old || ((PicoOpt & POPT_EXT_FM) && crashed_940) ||
((PicoOpt ^ PicoOpt_old) & SOUND_RERATE_FLAGS)) {
PsndRerate(Pico.m.frame_count ? 1 : 0);
}
snd_excess_add = ((PsndRate - PsndLen * target_fps)<<16) / target_fps;
printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
PsndRate, PsndLen, snd_excess_add, is_stereo, Pico.m.pal);
sndout_oss_start(PsndRate, 16, is_stereo);
sndout_oss_setvol(currentConfig.volume, currentConfig.volume);
PicoWriteSound = updateSound;
plat_update_volume(0, 0);
memset(sndBuffer, 0, sizeof(sndBuffer));
PsndOut = sndBuffer;
PicoWriteSound = updateSound;
PsndRate_old = PsndRate;
PicoOpt_old = PicoOpt;
pal_old = Pico.m.pal;
plat_update_volume(0, 0);
frame_samples = PsndLen;
snd_excess_add = ((PsndRate - PsndLen * target_fps)<<16) / target_fps;
if (snd_excess_add != 0)
frame_samples++;
if (soc == SOCID_POLLUX)
frame_samples *= 2; /* force larger buffer */
printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
PsndRate, PsndLen, snd_excess_add, is_stereo, Pico.m.pal);
sndout_oss_setvol(currentConfig.volume, currentConfig.volume);
sndout_oss_start(PsndRate, frame_samples, is_stereo);
/* Wiz's sound hardware needs more prebuffer */
soc = soc_detect();
if (soc == SOCID_POLLUX)
updateSound(PsndLen);
updateSound(frame_samples);
}
}