static int64_t Convert(double aTime, void* aClosure)
{
TrackRate sampleRate = IdealAudioRate();
ConvertTimeToTickHelper* This = static_cast<ConvertTimeToTickHelper*> (aClosure);
TrackTicks tick = This->mSourceStream->GetCurrentPosition();
StreamTime streamTime = TicksToTimeRoundDown(sampleRate, tick);
GraphTime graphTime = This->mSourceStream->StreamTimeToGraphTime(streamTime);
StreamTime destinationStreamTime = This->mDestinationStream->GraphTimeToStreamTime(graphTime);
return TimeToTicksRoundDown(sampleRate, destinationStreamTime + SecondsToMediaTime(aTime));
}
TrackTicks
WebAudioUtils::ConvertDestinationStreamTimeToSourceStreamTime(double aTime,
AudioNodeStream* aSource,
MediaStream* aDestination)
{
StreamTime streamTime = std::max<MediaTime>(0, SecondsToMediaTime(aTime));
GraphTime graphTime = aDestination->StreamTimeToGraphTime(streamTime);
StreamTime thisStreamTime = aSource->GraphTimeToStreamTimeOptimistic(graphTime);
TrackTicks ticks = TimeToTicksRoundUp(aSource->SampleRate(), thisStreamTime);
return ticks;
}
double
AudioNodeStream::TimeFromDestinationTime(AudioNodeStream* aDestination,
double aSeconds)
{
MOZ_ASSERT(aDestination->SampleRate() == SampleRate());
double destinationSeconds = std::max(0.0, aSeconds);
StreamTime streamTime = SecondsToMediaTime(destinationSeconds);
// MediaTime does not have the resolution of double
double offset = destinationSeconds - MediaTimeToSeconds(streamTime);
GraphTime graphTime = aDestination->StreamTimeToGraphTime(streamTime);
StreamTime thisStreamTime = GraphTimeToStreamTimeOptimistic(graphTime);
double thisSeconds = MediaTimeToSeconds(thisStreamTime) + offset;
MOZ_ASSERT(thisSeconds >= 0.0);
return thisSeconds;
}