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LIBRETRO: drop reduce framerate workaround

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This commit is contained in:
Giovanni Cascione 2023-04-08 17:46:12 +02:00
parent 3c5bfb83c0
commit 0707a3db54
2 changed files with 4 additions and 22 deletions
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4
backends/platform/libretro/include/os.h
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@ -42,10 +42,6 @@
#define PERF_SWITCH_RESET_THRESHOLD 60
#define PERF_SWITCH_RESET_REST REFRESH_RATE * 30
// Reduce framerate
#define REDUCE_FRAMERATE_REST REFRESH_RATE / 2
#define REDUCE_FRAMERATE_SHIFT_MAX 2
// Thread switch caller
#define THREAD_SWITCH_POLL (1 << 0)
#define THREAD_SWITCH_DELAY (1 << 1)

22
backends/platform/libretro/src/libretro.cpp
View File

@ -115,11 +115,11 @@ static void audio_buffer_init(uint16 sample_rate, uint16 frame_rate) {
samples_per_frame_buffer_size = samples_per_frame << 1 * sizeof(int16_t);
if (sound_buffer)
sound_buffer = (int16_t *)realloc(sound_buffer, samples_per_frame_buffer_size << REDUCE_FRAMERATE_SHIFT_MAX);
sound_buffer = (int16_t *)realloc(sound_buffer, samples_per_frame_buffer_size);
else
sound_buffer = (int16_t *)malloc(samples_per_frame_buffer_size << REDUCE_FRAMERATE_SHIFT_MAX);
sound_buffer = (int16_t *)malloc(samples_per_frame_buffer_size);
if (sound_buffer)
memset(sound_buffer, 0, samples_per_frame_buffer_size << REDUCE_FRAMERATE_SHIFT_MAX);
memset(sound_buffer, 0, samples_per_frame_buffer_size);
else
log_cb(RETRO_LOG_ERROR, "audio_buffer_init error.\n");
@ -775,21 +775,7 @@ void retro_run(void) {
/* Retrieve audio */
samples_count = 0;
if (audio_video_enable & 2) {
/* Framerate reduction using sound buffer size */
if ((audio_status & (AUDIO_STATUS_BUFFER_SUPPORT | AUDIO_STATUS_MUTE | AUDIO_STATUS_BUFFER_UNDERRUN)) == (AUDIO_STATUS_BUFFER_SUPPORT | AUDIO_STATUS_BUFFER_UNDERRUN)) {
if (reduce_framerate_shift < REDUCE_FRAMERATE_SHIFT_MAX)
reduce_framerate_shift++;
reduce_framerate_countdown = REDUCE_FRAMERATE_REST;
}
if (reduce_framerate_countdown)
reduce_framerate_countdown--;
else if (getThreadSwitchCaller() & THREAD_SWITCH_UPDATE)
reduce_framerate_shift = REDUCE_FRAMERATE_SHIFT_MAX;
else
reduce_framerate_shift = 0;
samples_count = ((Audio::MixerImpl *)g_system->getMixer())->mixCallback((byte *) sound_buffer, samples_per_frame_buffer_size << reduce_framerate_shift);
samples_count = ((Audio::MixerImpl *)g_system->getMixer())->mixCallback((byte *) sound_buffer, samples_per_frame_buffer_size);
}
audio_status = samples_count ? (audio_status & ~AUDIO_STATUS_MUTE) : (audio_status | AUDIO_STATUS_MUTE);