// Called on audio thread.
void AlsaSound::SoundLoop()
{
Common::SetCurrentThreadName("Audio thread - alsa");
while (m_thread_status.load() != ALSAThreadStatus::STOPPING)
{
while (m_thread_status.load() == ALSAThreadStatus::RUNNING)
{
m_mixer->Mix(mix_buffer, frames_to_deliver);
int rc = snd_pcm_writei(handle, mix_buffer, frames_to_deliver);
if (rc == -EPIPE)
{
// Underrun
snd_pcm_prepare(handle);
}
else if (rc < 0)
{
ERROR_LOG(AUDIO, "writei fail: %s", snd_strerror(rc));
}
}
if (m_thread_status.load() == ALSAThreadStatus::PAUSED)
{
snd_pcm_drop(handle); // Stop sound output
// Block until thread status changes.
std::unique_lock<std::mutex> lock(cv_m);
cv.wait(lock, [this]{ return m_thread_status.load() != ALSAThreadStatus::PAUSED; });
snd_pcm_prepare(handle); // resume sound output
}
}
AlsaShutdown();
m_thread_status.store(ALSAThreadStatus::STOPPED);
}
// Called on audio thread.
void AlsaSound::SoundLoop()
{
if (!AlsaInit()) {
thread_data = 2;
return;
}
Common::SetCurrentThreadName("Audio thread - alsa");
while (!thread_data)
{
m_mixer->Mix(reinterpret_cast<short *>(mix_buffer), frames_to_deliver);
int rc = m_muted ? 1337 : snd_pcm_writei(handle, mix_buffer, frames_to_deliver);
if (rc == -EPIPE)
{
// Underrun
snd_pcm_prepare(handle);
}
else if (rc < 0)
{
ERROR_LOG(AUDIO, "writei fail: %s", snd_strerror(rc));
}
}
AlsaShutdown();
thread_data = 2;
}