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(WiiU) lower audio latency

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FIX94 2016-12-01 19:46:33 +01:00
parent 76d0380e45
commit 2481ff3ad3
1 changed files with 15 additions and 10 deletions
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25
audio/drivers/wiiu_audio.c
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@ -49,16 +49,13 @@ typedef struct
OSSpinLock spinlock;
} ax_audio_t;
//4096 samples main buffer, 85ms total
#define AX_AUDIO_COUNT_SHIFT 12u
#define AX_AUDIO_COUNT (1u << AX_AUDIO_COUNT_SHIFT)
#define AX_AUDIO_COUNT_MASK (AX_AUDIO_COUNT - 1u)
//3072 samples main buffer, 64ms total
#define AX_AUDIO_COUNT 3072
#define AX_AUDIO_SIZE (AX_AUDIO_COUNT << 1u)
#define AX_AUDIO_SIZE_MASK (AX_AUDIO_SIZE - 1u)
#define AX_AUDIO_SAMPLE_COUNT 144 //3ms
#define AX_AUDIO_SAMPLE_MIN (AX_AUDIO_SAMPLE_COUNT * 4) //12ms
#define AX_AUDIO_SAMPLE_LOAD (AX_AUDIO_SAMPLE_COUNT * 11) //33ms
#define AX_AUDIO_SAMPLE_MIN (AX_AUDIO_SAMPLE_COUNT * 3) //9ms
#define AX_AUDIO_SAMPLE_LOAD (AX_AUDIO_SAMPLE_COUNT * 10) //30ms
#define AX_AUDIO_MAX_FREE (AX_AUDIO_COUNT - (AX_AUDIO_SAMPLE_COUNT * 2))
#define AX_AUDIO_RATE 48000
//#define ax_audio_ticks_to_samples(ticks) (((ticks) * 64) / 82875)
@ -174,6 +171,15 @@ static bool ax_audio_stop(void* data)
return true;
}
static int ax_audio_limit(int in)
{
if(in < 0)
in += AX_AUDIO_COUNT;
else if(in >= AX_AUDIO_COUNT)
in -= AX_AUDIO_COUNT;
return in;
}
static bool ax_audio_start(void* data)
{
ax_audio_t* ax = (ax_audio_t*)data;
@ -187,7 +193,7 @@ static bool ax_audio_start(void* data)
//set back to playing on enough buffered data
if(ax->written > AX_AUDIO_SAMPLE_LOAD)
{
AXSetMultiVoiceCurrentOffset(ax->mvoice, (ax->pos - ax->written) & AX_AUDIO_COUNT_MASK);
AXSetMultiVoiceCurrentOffset(ax->mvoice, ax_audio_limit(ax->pos - ax->written));
AXSetMultiVoiceState(ax->mvoice, AX_VOICE_STATE_PLAYING);
}
return true;
@ -242,8 +248,7 @@ static ssize_t ax_audio_write(void* data, const void* buf, size_t size)
{
ax->buffer_l[ax->pos] = src[i];
ax->buffer_r[ax->pos] = src[i + 1];
ax->pos++;
ax->pos &= AX_AUDIO_COUNT_MASK;
ax->pos = ax_audio_limit(ax->pos + 1);
//wrapped around, make sure to store cache
if(ax->pos == 0)
{