diff --git a/SDL/main.c b/SDL/main.c index e0b40e8..df6837f 100755 --- a/SDL/main.c +++ b/SDL/main.c @@ -94,6 +94,7 @@ static void open_menu(void) } run_gui(true); if (audio_playing) { + SDL_ClearQueuedAudio(device_id); SDL_PauseAudioDevice(device_id, 0); } GB_set_color_correction_mode(&gb, configuration.color_correction_mode); @@ -130,6 +131,7 @@ static void handle_events(GB_gameboy_t *gb) GB_set_key_state(gb, (GB_key_t) button, event.type == SDL_JOYBUTTONDOWN); } else if (button == JOYPAD_BUTTON_TURBO) { + SDL_ClearQueuedAudio(device_id); turbo_down = event.type == SDL_JOYBUTTONDOWN; GB_set_turbo_mode(gb, turbo_down, turbo_down && rewind_down); } @@ -239,7 +241,6 @@ static void handle_events(GB_gameboy_t *gb) paused = !paused; } break; - case SDL_SCANCODE_M: if (event.key.keysym.mod & MODIFIER) { #ifdef __APPLE__ @@ -253,6 +254,7 @@ static void handle_events(GB_gameboy_t *gb) SDL_PauseAudioDevice(device_id, 1); } else if (!audio_playing) { + SDL_ClearQueuedAudio(device_id); SDL_PauseAudioDevice(device_id, 0); } } @@ -288,6 +290,7 @@ static void handle_events(GB_gameboy_t *gb) case SDL_KEYUP: // Fallthrough if (event.key.keysym.scancode == configuration.keys[8]) { turbo_down = event.type == SDL_KEYDOWN; + SDL_ClearQueuedAudio(device_id); GB_set_turbo_mode(gb, turbo_down, turbo_down && rewind_down); } else if (event.key.keysym.scancode == configuration.keys_2[0]) { @@ -356,11 +359,24 @@ static void debugger_interrupt(int ignore) } static void gb_audio_callback(GB_gameboy_t *gb, GB_sample_t *sample) -{ - if ((SDL_GetQueuedAudioSize(device_id) / sizeof(GB_sample_t)) > have_aspec.freq / 12) { +{ + if (turbo_down) { + static unsigned skip = 0; + skip++; + if (skip == have_aspec.freq / 8) { + skip = 0; + } + if (skip > have_aspec.freq / 16) { + return; + } + } + + if (SDL_GetQueuedAudioSize(device_id) / sizeof(*sample) > have_aspec.freq / 4) { return; } + SDL_QueueAudio(device_id, sample, sizeof(*sample)); + } @@ -599,20 +615,14 @@ int main(int argc, char **argv) want_aspec.samples = 2048; } #else - if (sdl_version >= 2006) { - /* SDL 2.0.6 offers WASAPI support which allows for much lower audio buffer lengths which at least - theoretically reduces lagging. */ - want_aspec.samples = 32; - } - else { + if (sdl_version < 2006) { /* Since WASAPI audio was introduced in SDL 2.0.6, we have to lower the audio frequency to 44100 because otherwise we would get garbled audio output.*/ want_aspec.freq = 44100; } #endif - device_id = SDL_OpenAudioDevice(0, 0, &want_aspec, &have_aspec, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE); - + device_id = SDL_OpenAudioDevice(0, 0, &want_aspec, &have_aspec, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE | SDL_AUDIO_ALLOW_SAMPLES_CHANGE); /* Start Audio */ SDL_EventState(SDL_DROPFILE, SDL_ENABLE);