105 lines
2.2 KiB
C++
105 lines
2.2 KiB
C++
/*****************************************************************************\
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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This file is licensed under the Snes9x License.
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For further information, consult the LICENSE file in the root directory.
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\*****************************************************************************/
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#include "gtk_sound_driver_sdl.h"
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#include "gtk_s9x.h"
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static void sdl_audio_callback(void *userdata, Uint8 *stream, int len)
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{
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((S9xSDLSoundDriver *)userdata)->mix((unsigned char *)stream, len);
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}
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static void samples_available(void *data)
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{
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SDL_LockAudio();
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S9xFinalizeSamples();
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SDL_UnlockAudio();
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}
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void S9xSDLSoundDriver::mix(unsigned char *output, int bytes)
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{
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SDL_LockAudio();
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S9xMixSamples(output, bytes >> 1);
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SDL_UnlockAudio();
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}
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S9xSDLSoundDriver::S9xSDLSoundDriver()
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{
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audiospec = NULL;
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}
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void S9xSDLSoundDriver::init()
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{
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SDL_InitSubSystem(SDL_INIT_AUDIO);
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stop();
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}
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void S9xSDLSoundDriver::terminate()
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{
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stop();
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if (audiospec)
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{
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SDL_CloseAudio();
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free(audiospec);
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audiospec = NULL;
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}
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SDL_QuitSubSystem(SDL_INIT_AUDIO);
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}
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void S9xSDLSoundDriver::start()
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{
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if (!gui_config->mute_sound)
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{
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if (audiospec)
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{
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SDL_PauseAudio(0);
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}
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}
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}
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void S9xSDLSoundDriver::stop()
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{
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if (audiospec)
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{
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SDL_PauseAudio(1);
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}
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}
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bool S9xSDLSoundDriver::open_device()
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{
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audiospec = (SDL_AudioSpec *)malloc(sizeof(SDL_AudioSpec));
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audiospec->freq = Settings.SoundPlaybackRate;
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audiospec->channels = 2;
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audiospec->format = AUDIO_S16SYS;
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audiospec->samples = (gui_config->sound_buffer_size * audiospec->freq / 1000) >> 1;
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audiospec->callback = sdl_audio_callback;
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audiospec->userdata = this;
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printf("SDL sound driver initializing...\n");
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printf(" --> (Frequency: %dhz, Latency: %dms)...",
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audiospec->freq,
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(audiospec->samples * 1000 / audiospec->freq) << 1);
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if (SDL_OpenAudio(audiospec, NULL) < 0)
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{
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printf("Failed\n");
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free(audiospec);
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audiospec = NULL;
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return false;
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}
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printf("OK\n");
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S9xSetSamplesAvailableCallback(samples_available, NULL);
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return true;
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}
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