// This code used to live inside AudioStream::Init(), but on Mac (others?)
// it has been known to take 300-800 (or even 8500) ms to execute(!)
nsresult
AudioStream::OpenCubeb(cubeb_stream_params &aParams,
LatencyRequest aLatencyRequest)
{
cubeb* cubebContext = CubebUtils::GetCubebContext();
if (!cubebContext) {
NS_WARNING("Can't get cubeb context!");
MonitorAutoLock mon(mMonitor);
mState = AudioStream::ERRORED;
return NS_ERROR_FAILURE;
}
// If the latency pref is set, use it. Otherwise, if this stream is intended
// for low latency playback, try to get the lowest latency possible.
// Otherwise, for normal streams, use 100ms.
uint32_t latency;
if (aLatencyRequest == LowLatency && !CubebUtils::CubebLatencyPrefSet()) {
if (cubeb_get_min_latency(cubebContext, aParams, &latency) != CUBEB_OK) {
latency = CubebUtils::GetCubebLatency();
}
} else {
latency = CubebUtils::GetCubebLatency();
}
{
cubeb_stream* stream;
if (cubeb_stream_init(cubebContext, &stream, "AudioStream", aParams,
latency, DataCallback_S, StateCallback_S, this) == CUBEB_OK) {
MonitorAutoLock mon(mMonitor);
MOZ_ASSERT(mState != SHUTDOWN);
mCubebStream.reset(stream);
// We can't cubeb_stream_start() the thread from a transient thread due to
// cubeb API requirements (init can be called from another thread, but
// not start/stop/destroy/etc)
} else {
MonitorAutoLock mon(mMonitor);
mState = ERRORED;
NS_WARNING(nsPrintfCString("AudioStream::OpenCubeb() %p failed to init cubeb", this).get());
return NS_ERROR_FAILURE;
}
}
cubeb_stream_register_device_changed_callback(mCubebStream.get(),
AudioStream::DeviceChangedCallback_s);
mState = INITIALIZED;
if (!mStartTime.IsNull()) {
TimeDuration timeDelta = TimeStamp::Now() - mStartTime;
LOG(("AudioStream creation time %sfirst: %u ms", mIsFirst ? "" : "not ",
(uint32_t) timeDelta.ToMilliseconds()));
Telemetry::Accumulate(mIsFirst ? Telemetry::AUDIOSTREAM_FIRST_OPEN_MS :
Telemetry::AUDIOSTREAM_LATER_OPEN_MS, timeDelta.ToMilliseconds());
}
return NS_OK;
}
void
AudioCallbackDriver::Init()
{
cubeb_stream_params params;
uint32_t latency;
MOZ_ASSERT(!NS_IsMainThread(),
"This is blocking and should never run on the main thread.");
mSampleRate = params.rate = CubebUtils::PreferredSampleRate();
#if defined(__ANDROID__)
#if defined(MOZ_B2G)
params.stream_type = CubebUtils::ConvertChannelToCubebType(mAudioChannel);
#else
params.stream_type = CUBEB_STREAM_TYPE_MUSIC;
#endif
if (params.stream_type == CUBEB_STREAM_TYPE_MAX) {
NS_WARNING("Bad stream type");
return;
}
#else
(void)mAudioChannel;
#endif
params.channels = mGraphImpl->AudioChannelCount();
if (AUDIO_OUTPUT_FORMAT == AUDIO_FORMAT_S16) {
params.format = CUBEB_SAMPLE_S16NE;
} else {
params.format = CUBEB_SAMPLE_FLOAT32NE;
}
if (cubeb_get_min_latency(CubebUtils::GetCubebContext(), params, &latency) != CUBEB_OK) {
NS_WARNING("Could not get minimal latency from cubeb.");
return;
}
cubeb_stream* stream;
if (cubeb_stream_init(CubebUtils::GetCubebContext(), &stream,
"AudioCallbackDriver", params, latency,
DataCallback_s, StateCallback_s, this) == CUBEB_OK) {
mAudioStream.own(stream);
} else {
NS_WARNING("Could not create a cubeb stream for MediaStreamGraph.");
return;
}
cubeb_stream_register_device_changed_callback(mAudioStream,
AudioCallbackDriver::DeviceChangedCallback_s);
StartStream();
STREAM_LOG(PR_LOG_DEBUG, ("AudioCallbackDriver started."));
}
void
AudioCallbackDriver::Init()
{
cubeb_stream_params params;
uint32_t latency;
MOZ_ASSERT(!NS_IsMainThread(),
"This is blocking and should never run on the main thread.");
mSampleRate = params.rate = CubebUtils::PreferredSampleRate();
#if defined(__ANDROID__)
#if defined(MOZ_B2G)
params.stream_type = CubebUtils::ConvertChannelToCubebType(mAudioChannel);
#else
params.stream_type = CUBEB_STREAM_TYPE_MUSIC;
#endif
if (params.stream_type == CUBEB_STREAM_TYPE_MAX) {
NS_WARNING("Bad stream type");
return;
}
#else
(void)mAudioChannel;
#endif
params.channels = mGraphImpl->AudioChannelCount();
if (AUDIO_OUTPUT_FORMAT == AUDIO_FORMAT_S16) {
params.format = CUBEB_SAMPLE_S16NE;
} else {
params.format = CUBEB_SAMPLE_FLOAT32NE;
}
if (cubeb_get_min_latency(CubebUtils::GetCubebContext(), params, &latency) != CUBEB_OK) {
NS_WARNING("Could not get minimal latency from cubeb.");
return;
}
cubeb_stream* stream;
if (cubeb_stream_init(CubebUtils::GetCubebContext(), &stream,
"AudioCallbackDriver", params, latency,
DataCallback_s, StateCallback_s, this) == CUBEB_OK) {
mAudioStream.own(stream);
} else {
NS_WARNING("Could not create a cubeb stream for MediaStreamGraph, falling back to a SystemClockDriver");
// Fall back to a driver using a normal thread.
mNextDriver = new SystemClockDriver(GraphImpl());
mNextDriver->SetGraphTime(this, mIterationStart, mIterationEnd);
mGraphImpl->SetCurrentDriver(mNextDriver);
DebugOnly<bool> found = mGraphImpl->RemoveMixerCallback(this);
NS_WARN_IF_FALSE(!found, "Mixer callback not added when switching?");
mNextDriver->Start();
return;
}
cubeb_stream_register_device_changed_callback(mAudioStream,
AudioCallbackDriver::DeviceChangedCallback_s);
StartStream();
STREAM_LOG(LogLevel::Debug, ("AudioCallbackDriver started."));
}
