SdlAudioSink::SdlAudioSink(const AudioSource &source, int device_id)
: bytes_per_sample(source.BytesPerSample()),
ring_buf(RINGBUF_POWER, source.BytesPerSample()),
position_sample_count(0),
source_out(false),
state(Audio::State::STOPPED)
{
const char *name = SDL_GetAudioDeviceName(device_id, 0);
if (name == nullptr) {
throw ConfigError(std::string("invalid device id: ") +
std::to_string(device_id));
}
SDL_AudioSpec want;
SDL_zero(want);
want.freq = source.SampleRate();
want.format = FORMATS[static_cast<int>(source.OutputSampleFormat())];
want.channels = source.ChannelCount();
want.callback = &SDLCallback;
want.userdata = (void *)this;
SDL_AudioSpec have;
SDL_zero(have);
this->device = SDL_OpenAudioDevice(name, 0, &want, &have, 0);
if (this->device == 0) {
throw ConfigError(std::string("couldn't open device: ") +
SDL_GetError());
}
}
