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libretro: Use audio/video callbacks instead of bloating up retro_run

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This commit is contained in:
Rupert Carmichael
2025-08-07 23:14:25 -04:00
parent 6c89c3b26f
commit eb87bbfad3
1 changed files with 45 additions and 24 deletions
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69
libretro/libretro.cpp
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@@ -1495,6 +1495,45 @@ static void check_variables(void)
}
static bool NST_CALLBACK nst_cb_videolock(void *udata, Api::Video::Output& video) {
video.pixels = video_buffer;
video.pitch = Api::Video::Output::NTSC_WIDTH * sizeof(uint32_t);
int dif = blargg_ntsc ? 9 : 4;
size_t vboffset = ((blargg_ntsc ? Api::Video::Output::NTSC_WIDTH : Api::Video::Output::WIDTH) * overscan_v_top) +
((overscan_h_left * dif) / 4);
video_cb(video_buffer + vboffset,
video_width - (((overscan_h_left + overscan_h_right) * dif) / 4),
Api::Video::Output::HEIGHT - (overscan_v_top + overscan_v_bottom),
pitch);
return true;
}
static void NST_CALLBACK nst_cb_videounlock(void *udata, Api::Video::Output& video) {
}
static bool NST_CALLBACK nst_cb_soundlock(void* udata, Api::Sound::Output& sound) {
unsigned frames = is_pal ? SAMPLERATE / 50 : SAMPLERATE / 60;
// Use audio buffer untouched for stereo, duplicate samples for mono
if (Api::Sound(emulator).GetSpeaker() == Api::Sound::SPEAKER_MONO) {
for (unsigned i = 0; i < frames; i++) {
audio_stereo_buffer[i << 1] = audio_stereo_buffer[(i << 1) + 1] = audio_buffer[i];
}
audio_batch_cb(audio_stereo_buffer, frames);
}
else {
audio_batch_cb(audio_buffer, frames);
}
return true;
}
static void NST_CALLBACK nst_cb_soundunlock(void* udata, Api::Sound::Output& sound) {
}
void retro_run(void)
{
poll_fds_buttons();
@@ -1503,8 +1542,6 @@ void retro_run(void)
if (show_crosshair == SHOW_CROSSHAIR_ON)
draw_crosshair(crossx, crossy);
unsigned frames = is_pal ? SAMPLERATE / 50 : SAMPLERATE / 60;
bool updated = false;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
{
@@ -1513,28 +1550,6 @@ void retro_run(void)
video = 0;
video = new Api::Video::Output(video_buffer, video_width * sizeof(uint32_t));
}
int dif = blargg_ntsc ? 9 : 4;
// Absolute mess of inline if statements...
video_cb(video_buffer + ((blargg_ntsc ? Api::Video::Output::NTSC_WIDTH : Api::Video::Output::WIDTH) * overscan_v_top) + ((overscan_h_left * dif) / 4) + 0,
video_width - (((overscan_h_left + overscan_h_right) * dif) / 4),
Api::Video::Output::HEIGHT - (overscan_v_top + overscan_v_bottom),
pitch);
// Use audio buffer untouched for stereo, duplicate samples for mono
if (Api::Sound(emulator).GetSpeaker() == Api::Sound::SPEAKER_MONO)
{
for (unsigned i = 0; i < frames; i++)
{
audio_stereo_buffer[(i << 1) + 0] = audio_stereo_buffer[(i << 1) + 1] = audio_buffer[i];
}
audio_batch_cb(audio_stereo_buffer, frames);
}
else
{
audio_batch_cb(audio_buffer, frames);
}
}
static void extract_basename(char *buf, const char *path, size_t size)
@@ -1798,6 +1813,12 @@ bool retro_load_game(const struct retro_game_info *info)
Api::User::eventCallback.Set(nst_cb_event, 0);
Api::Sound::Output::lockCallback.Set(nst_cb_soundlock, NULL);
Api::Sound::Output::unlockCallback.Set(nst_cb_soundunlock, NULL);
Api::Video::Output::lockCallback.Set(nst_cb_videolock, NULL);
Api::Video::Output::unlockCallback.Set(nst_cb_videounlock, NULL);
machine->Power(true);
check_variables();