void
AudioCallbackDriver::DeviceChangedCallback() {
MonitorAutoLock mon(mGraphImpl->GetMonitor());
PanOutputIfNeeded(mMicrophoneActive);
// On OSX, changing the output device causes the audio thread to no call the
// audio callback, so we're unable to process real-time input data, and this
// results in latency building up.
// We switch to a system driver until audio callbacks are called again, so we
// still pull from the input stream, so that everything works apart from the
// audio output.
#ifdef XP_MACOSX
// Don't bother doing the device switching dance if the graph is not RUNNING
// (starting up, shutting down), because we haven't started pulling from the
// SourceMediaStream.
if (!GraphImpl()->Running()) {
return;
}
if (mSelfReference) {
return;
}
STREAM_LOG(LogLevel::Error, ("Switching to SystemClockDriver during output switch"));
mSelfReference.Take(this);
mCallbackReceivedWhileSwitching = 0;
mNextDriver = new SystemClockDriver(GraphImpl());
mNextDriver->SetGraphTime(this, mIterationStart, mIterationEnd);
mGraphImpl->SetCurrentDriver(mNextDriver);
mNextDriver->Start();
#endif
}
void AudioStream::DeviceChangedCallback()
{
MonitorAutoLock mon(mMonitor);
PanOutputIfNeeded(mMicrophoneActive);
mShouldDropFrames = true;
ResetStreamIfNeeded();
}
void
AudioCallbackDriver::SetMicrophoneActive(bool aActive)
{
MonitorAutoLock mon(mGraphImpl->GetMonitor());
mMicrophoneActive = aActive;
PanOutputIfNeeded(mMicrophoneActive);
}
void
AudioStream::SetMicrophoneActive(bool aActive)
{
MonitorAutoLock mon(mMonitor);
mMicrophoneActive = aActive;
PanOutputIfNeeded(mMicrophoneActive);
}
void
AudioStream::StartUnlocked()
{
mMonitor.AssertCurrentThreadOwns();
if (!mCubebStream) {
mNeedsStart = true;
return;
}
if (mState == INITIALIZED) {
int r;
{
MonitorAutoUnlock mon(mMonitor);
r = cubeb_stream_start(mCubebStream.get());
PanOutputIfNeeded(mMicrophoneActive);
}
mState = r == CUBEB_OK ? STARTED : ERRORED;
LOG(("AudioStream: started %p, state %s", this, mState == STARTED ? "STARTED" : "ERRORED"));
}
}
void
AudioCallbackDriver::DeviceChangedCallback() {
MonitorAutoLock mon(mGraphImpl->GetMonitor());
PanOutputIfNeeded(mMicrophoneActive);
}
