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libretro: Sound buffering change.

This commit is contained in:
BearOso 2022-03-21 14:52:49 -05:00
parent 93d538dfaf
commit 2262544c4e
1 changed files with 9 additions and 14 deletions
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23
libretro/libretro.cpp
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@ -16,6 +16,8 @@
#include "conffile.h"
#include "crosshairs.h"
#include <stdio.h>
#include <vector>
#ifdef _WIN32
#include <direct.h>
#else
@ -753,23 +755,16 @@ static void update_variables(void)
static void S9xAudioCallback(void*)
{
const int BUFFER_SIZE = 256;
// This is called every time 128 to 132 samples are generated, which happens about 8 times per frame. A buffer size of 256 samples is enough here.
static int16_t audio_buf[BUFFER_SIZE];
static std::vector<int16_t> audio_buffer;
size_t avail = S9xGetSampleCount();
while (avail >= BUFFER_SIZE)
if (avail > 256)
{
//this loop will never be entered, but handle oversized sample counts just in case
S9xMixSamples((uint8*)audio_buf, BUFFER_SIZE);
audio_batch_cb(audio_buf, BUFFER_SIZE >> 1);
if (audio_buffer.size() < avail)
audio_buffer.resize(avail);
avail -= BUFFER_SIZE;
}
if (avail > 0)
{
S9xMixSamples((uint8*)audio_buf, avail);
audio_batch_cb(audio_buf, avail >> 1);
S9xMixSamples((uint8*)&audio_buffer[0], avail);
audio_batch_cb(&audio_buffer[0], avail >> 1);
}
}
@ -1370,7 +1365,7 @@ void retro_init(void)
exit(1);
}
S9xInitSound(0);
S9xInitSound(32);
S9xSetSoundMute(FALSE);
S9xSetSamplesAvailableCallback(S9xAudioCallback, NULL);