//============================================================
// sdl_init
//============================================================
static int sdl_init(running_machine &machine)
{
int n_channels = 2;
int audio_latency;
SDL_AudioSpec aspec, obtained;
char audio_driver[16] = "";
if (initialized_audio)
{
sdl_cleanup_audio(machine);
}
mame_printf_verbose("Audio: Start initialization\n");
#if (SDLMAME_SDL2)
strncpy(audio_driver, SDL_GetCurrentAudioDriver(), sizeof(audio_driver));
#else
SDL_AudioDriverName(audio_driver, sizeof(audio_driver));
#endif
mame_printf_verbose("Audio: Driver is %s\n", audio_driver);
initialized_audio = 0;
sdl_xfer_samples = SDL_XFER_SAMPLES;
stream_in_initialized = 0;
stream_loop = 0;
// set up the audio specs
aspec.freq = machine.sample_rate();
aspec.format = AUDIO_S16SYS; // keep endian independent
aspec.channels = n_channels;
aspec.samples = sdl_xfer_samples;
aspec.callback = sdl_callback;
aspec.userdata = 0;
if (SDL_OpenAudio(&aspec, &obtained) < 0)
goto cant_start_audio;
initialized_audio = 1;
snd_enabled = 1;
mame_printf_verbose("Audio: frequency: %d, channels: %d, samples: %d\n",
obtained.freq, obtained.channels, obtained.samples);
sdl_xfer_samples = obtained.samples;
audio_latency = downcast<sdl_options &>(machine.options()).audio_latency();
// pin audio latency
if (audio_latency > MAX_AUDIO_LATENCY)
{
audio_latency = MAX_AUDIO_LATENCY;
}
else if (audio_latency < 1)
{
audio_latency = 1;
}
// compute the buffer sizes
stream_buffer_size = machine.sample_rate() * 2 * sizeof(INT16) * audio_latency / MAX_AUDIO_LATENCY;
stream_buffer_size = (stream_buffer_size / 1024) * 1024;
if (stream_buffer_size < 1024)
stream_buffer_size = 1024;
// create the buffers
if (sdl_create_buffers())
goto cant_create_buffers;
mame_printf_verbose("Audio: End initialization\n");
return 0;
// error handling
cant_create_buffers:
cant_start_audio:
mame_printf_verbose("Audio: Initialization failed. SDL error: %s\n", SDL_GetError());
return 0;
}
//============================================================
// sdl_init
//============================================================
static int sdl_init(running_machine *machine)
{
int n_channels = 2;
int audio_latency;
SDL_AudioSpec aspec, obtained;
char audio_driver[16];
if (initialized_audio)
{
sdl_cleanup_audio(machine);
}
initialized_audio = 0;
sdl_xfer_samples = SDL_XFER_SAMPLES;
stream_in_initialized = 0;
stream_loop = 0;
// set up the audio specs
aspec.freq = machine->sample_rate;
aspec.format = AUDIO_S16SYS; // keep endian independant
aspec.channels = n_channels;
aspec.samples = sdl_xfer_samples;
aspec.callback = sdl_callback;
aspec.userdata = 0;
if (SDL_OpenAudio(&aspec, &obtained) < 0)
goto cant_start_audio;
initialized_audio = 1;
snd_enabled = 1;
#if (SDL_VERSION_ATLEAST(1,3,0))
strncpy(audio_driver, SDL_GetCurrentAudioDriver(), sizeof(audio_driver));
#else
SDL_AudioDriverName(audio_driver, sizeof(audio_driver));
#endif
mame_printf_verbose("Audio initialized - driver: %s, frequency: %d, "
"channels: %d, samples: %d\n", audio_driver,
obtained.freq, obtained.channels, obtained.samples);
sdl_xfer_samples = obtained.samples;
audio_latency = options_get_int(mame_options(), SDLOPTION_AUDIO_LATENCY);
// pin audio latency
if (audio_latency > MAX_AUDIO_LATENCY)
{
audio_latency = MAX_AUDIO_LATENCY;
}
else if (audio_latency < 1)
{
audio_latency = 1;
}
// compute the buffer sizes
stream_buffer_size = machine->sample_rate * 2 * sizeof(INT16) * audio_latency / MAX_AUDIO_LATENCY;
stream_buffer_size = (stream_buffer_size / 1024) * 1024;
if (stream_buffer_size < 1024)
stream_buffer_size = 1024;
// create the buffers
if (sdl_create_buffers())
goto cant_create_buffers;
return 0;
// error handling
cant_create_buffers:
cant_start_audio:
return 0;
}