int64_t
AudioSinkWrapper::GetPosition(TimeStamp* aTimeStamp) const
{
AssertOwnerThread();
MOZ_ASSERT(mIsStarted, "Must be called after playback starts.");
int64_t pos = -1;
TimeStamp t = TimeStamp::Now();
if (!mAudioEnded) {
// Rely on the audio sink to report playback position when it is not ended.
pos = mAudioSink->GetPosition();
} else if (!mPlayStartTime.IsNull()) {
// Calculate playback position using system clock if we are still playing.
pos = GetVideoPosition(t);
} else {
// Return how long we've played if we are not playing.
pos = mPlayDuration;
}
if (aTimeStamp) {
*aTimeStamp = t;
}
return pos;
}
void
AudioSinkWrapper::SetPlaybackRate(double aPlaybackRate)
{
AssertOwnerThread();
mParams.mPlaybackRate = aPlaybackRate;
if (!mAudioEnded) {
// Pass the playback rate to the audio sink. The underlying AudioStream
// will handle playback rate changes and report correct audio position.
mAudioSink->SetPlaybackRate(aPlaybackRate);
} else if (!mPlayStartTime.IsNull()) {
// Adjust playback duration and start time when we are still playing.
TimeStamp now = TimeStamp::Now();
mPlayDuration = GetVideoPosition(now);
mPlayStartTime = now;
}
// Do nothing when not playing. Changes in playback rate will be taken into
// account by GetVideoPosition().
}
