mirror of https://github.com/snes9xgit/snes9x.git
123 lines
2.1 KiB
C++
123 lines
2.1 KiB
C++
#include "gtk_s9x.h"
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#include "gtk_sound_driver_sdl.h"
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static void
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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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return;
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}
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static void
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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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return;
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}
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void
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S9xSDLSoundDriver::mix (unsigned char *output, int bytes)
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{
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SDL_LockAudio ();
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S9xMixSamples (output, bytes >> (Settings.SixteenBitSound ? 1 : 0));
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SDL_UnlockAudio ();
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return;
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}
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S9xSDLSoundDriver::S9xSDLSoundDriver (void)
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{
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audiospec = NULL;
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return;
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}
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void
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S9xSDLSoundDriver::init (void)
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{
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SDL_InitSubSystem (SDL_INIT_AUDIO);
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stop ();
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return;
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}
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void
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S9xSDLSoundDriver::terminate (void)
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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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return;
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}
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void
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S9xSDLSoundDriver::start (void)
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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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return;
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}
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void
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S9xSDLSoundDriver::stop (void)
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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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return;
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}
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bool8
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S9xSDLSoundDriver::open_device (void)
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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 = Settings.Stereo ? 2 : 1;
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audiospec->format = Settings.SixteenBitSound ? AUDIO_S16SYS : AUDIO_U8;
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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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