/**
* \brief Opens, checks current audio status, and closes a device.
*
* \sa https://wiki.libsdl.org/SDL_GetAudioStatus
*/
int audio_openCloseAndGetAudioStatus()
{
SDL_AudioStatus result;
int i;
int count;
char *device;
SDL_AudioDeviceID id;
SDL_AudioSpec desired, obtained;
/* Get number of devices. */
count = SDL_GetNumAudioDevices(0);
SDLTest_AssertPass("Call to SDL_GetNumAudioDevices(0)");
if (count > 0) {
for (i = 0; i < count; i++) {
/* Get device name */
device = (char *)SDL_GetAudioDeviceName(i, 0);
SDLTest_AssertPass("SDL_GetAudioDeviceName(%i,0)", i);
SDLTest_AssertCheck(device != NULL, "Validate device name is not NULL; got: %s", (device != NULL) ? device : "NULL");
if (device == NULL) return TEST_ABORTED;
/* Set standard desired spec */
desired.freq=22050;
desired.format=AUDIO_S16SYS;
desired.channels=2;
desired.samples=4096;
desired.callback=_audio_testCallback;
desired.userdata=NULL;
/* Open device */
id = SDL_OpenAudioDevice((const char *)device, 0, &desired, &obtained, SDL_AUDIO_ALLOW_ANY_CHANGE);
SDLTest_AssertPass("SDL_OpenAudioDevice('%s',...)", device);
SDLTest_AssertCheck(id > 1, "Validate device ID; expected: >=2, got: %i", id);
if (id > 1) {
/* Check device audio status */
result = SDL_GetAudioDeviceStatus(id);
SDLTest_AssertPass("Call to SDL_GetAudioDeviceStatus()");
SDLTest_AssertCheck(result == SDL_AUDIO_STOPPED || result == SDL_AUDIO_PLAYING || result == SDL_AUDIO_PAUSED,
"Verify returned value; expected: STOPPED (%i) | PLAYING (%i) | PAUSED (%i), got: %i",
SDL_AUDIO_STOPPED, SDL_AUDIO_PLAYING, SDL_AUDIO_PAUSED, result);
/* Close device again */
SDL_CloseAudioDevice(id);
SDLTest_AssertPass("Call to SDL_CloseAudioDevice()");
}
}
} else {
SDLTest_Log("No devices to test with");
}
return TEST_COMPLETED;
}
void SoundSDL::write(uint16_t * finalWave, int length)
{
if (!_initialized)
return;
if (SDL_GetAudioDeviceStatus(_dev) != SDL_AUDIO_PLAYING)
SDL_PauseAudioDevice(_dev, 0);
SDL_mutexP(_mutex);
unsigned int samples = length / 4;
std::size_t avail;
while ((avail = _rbuf.avail() / 2) < samples)
{
bool lock = (emulating && !speedup && throttle && !gba_joybus_active) ? true : false;
_rbuf.write(finalWave, avail * 2);
finalWave += avail * 2;
samples -= avail;
SDL_mutexV(_mutex);
SDL_SemPost(_semBufferFull);
if (lock)
{
SDL_SemWait(_semBufferEmpty);
if (throttle > 0 && throttle != current_rate)
{
SDL_CloseAudio();
init(soundGetSampleRate() * throttle / 100);
current_rate = throttle;
}
}
else
{
// Drop the remaining of the audio data
return;
}
SDL_mutexP(_mutex);
}
_rbuf.write(finalWave, samples * 2);
SDL_mutexV(_mutex);
}
static void
loop()
{
SDL_bool please_quit = SDL_FALSE;
SDL_Event e;
while (SDL_PollEvent(&e)) {
if (e.type == SDL_QUIT) {
please_quit = SDL_TRUE;
} else if (e.type == SDL_KEYDOWN) {
if (e.key.keysym.sym == SDLK_ESCAPE) {
please_quit = SDL_TRUE;
}
} else if (e.type == SDL_MOUSEBUTTONDOWN) {
if (e.button.button == 1) {
SDL_PauseAudioDevice(devid_out, SDL_TRUE);
SDL_PauseAudioDevice(devid_in, SDL_FALSE);
}
} else if (e.type == SDL_MOUSEBUTTONUP) {
if (e.button.button == 1) {
SDL_PauseAudioDevice(devid_in, SDL_TRUE);
SDL_PauseAudioDevice(devid_out, SDL_FALSE);
}
}
}
if (SDL_GetAudioDeviceStatus(devid_in) == SDL_AUDIO_PLAYING) {
SDL_SetRenderDrawColor(renderer, 0, 255, 0, 255);
} else {
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
}
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
if (please_quit) {
/* stop playing back, quit. */
SDL_Log("Shutting down.\n");
SDL_PauseAudioDevice(devid_in, 1);
SDL_CloseAudioDevice(devid_in);
SDL_PauseAudioDevice(devid_out, 1);
SDL_CloseAudioDevice(devid_out);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
#ifdef __EMSCRIPTEN__
emscripten_cancel_main_loop();
#endif
exit(0);
}
/* Note that it would be easier to just have a one-line function that
calls SDL_QueueAudio() as a capture device callback, but we're
trying to test the API, so we use SDL_DequeueAudio() here. */
while (SDL_TRUE) {
Uint8 buf[1024];
const Uint32 br = SDL_DequeueAudio(devid_in, buf, sizeof (buf));
SDL_QueueAudio(devid_out, buf, br);
if (br < sizeof (buf)) {
break;
}
}
}