RefPtr<MediaSourceTrackDemuxer::SeekPromise>
MediaSourceTrackDemuxer::DoSeek(const TimeUnit& aTime)
{
if (!mManager) {
return SeekPromise::CreateAndReject(
MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
RESULT_DETAIL("manager is detached.")), __func__);
}
MOZ_ASSERT(OnTaskQueue());
TimeIntervals buffered = mManager->Buffered(mType);
// Fuzz factor represents a +/- threshold. So when seeking it allows the gap
// to be twice as big as the fuzz value. We only want to allow EOS_FUZZ gap.
buffered.SetFuzz(MediaSourceDemuxer::EOS_FUZZ / 2);
TimeUnit seekTime = std::max(aTime - mPreRoll, TimeUnit::Zero());
if (mManager->IsEnded() && seekTime >= buffered.GetEnd()) {
// We're attempting to seek past the end time. Cap seekTime so that we seek
// to the last sample instead.
seekTime =
std::max(mManager->HighestStartTime(mType) - mPreRoll, TimeUnit::Zero());
}
if (!buffered.ContainsWithStrictEnd(seekTime)) {
if (!buffered.ContainsWithStrictEnd(aTime)) {
// We don't have the data to seek to.
return SeekPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_WAITING_FOR_DATA,
__func__);
}
// Theoretically we should reject the promise with WAITING_FOR_DATA,
// however, to avoid unwanted regressions we assume that if at this time
// we don't have the wanted data it won't come later.
// Instead of using the pre-rolled time, use the earliest time available in
// the interval.
TimeIntervals::IndexType index = buffered.Find(aTime);
MOZ_ASSERT(index != TimeIntervals::NoIndex);
seekTime = buffered[index].mStart;
}
seekTime = mManager->Seek(mType, seekTime, MediaSourceDemuxer::EOS_FUZZ);
MediaResult result = NS_OK;
RefPtr<MediaRawData> sample =
mManager->GetSample(mType,
TimeUnit::Zero(),
result);
MOZ_ASSERT(NS_SUCCEEDED(result) && sample);
mNextSample = Some(sample);
mReset = false;
{
MonitorAutoLock mon(mMonitor);
mNextRandomAccessPoint =
mManager->GetNextRandomAccessPoint(mType, MediaSourceDemuxer::EOS_FUZZ);
}
return SeekPromise::CreateAndResolve(seekTime, __func__);
}
RefPtr<MediaSourceTrackDemuxer::SkipAccessPointPromise>
MediaSourceTrackDemuxer::DoSkipToNextRandomAccessPoint(
const TimeUnit& aTimeThreadshold)
{
if (!mManager) {
return SkipAccessPointPromise::CreateAndReject(
SkipFailureHolder(MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
RESULT_DETAIL("manager is detached.")), 0), __func__);
}
MOZ_ASSERT(OnTaskQueue());
uint32_t parsed = 0;
// Ensure that the data we are about to skip to is still available.
TimeIntervals buffered = mManager->Buffered(mType);
buffered.SetFuzz(MediaSourceDemuxer::EOS_FUZZ / 2);
if (buffered.ContainsWithStrictEnd(aTimeThreadshold)) {
bool found;
parsed = mManager->SkipToNextRandomAccessPoint(mType,
aTimeThreadshold,
MediaSourceDemuxer::EOS_FUZZ,
found);
if (found) {
return SkipAccessPointPromise::CreateAndResolve(parsed, __func__);
}
}
SkipFailureHolder holder(
mManager->IsEnded() ? NS_ERROR_DOM_MEDIA_END_OF_STREAM :
NS_ERROR_DOM_MEDIA_WAITING_FOR_DATA, parsed);
return SkipAccessPointPromise::CreateAndReject(holder, __func__);
}
RefPtr<MediaSourceTrackDemuxer::SamplesPromise>
MediaSourceTrackDemuxer::DoGetSamples(int32_t aNumSamples)
{
if (!mManager) {
return SamplesPromise::CreateAndReject(
MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
RESULT_DETAIL("manager is detached.")), __func__);
}
MOZ_ASSERT(OnTaskQueue());
if (mReset) {
// If a seek (or reset) was recently performed, we ensure that the data
// we are about to retrieve is still available.
TimeIntervals buffered = mManager->Buffered(mType);
buffered.SetFuzz(MediaSourceDemuxer::EOS_FUZZ / 2);
if (!buffered.Length() && mManager->IsEnded()) {
return SamplesPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_END_OF_STREAM,
__func__);
}
if (!buffered.ContainsWithStrictEnd(TimeUnit::Zero())) {
return SamplesPromise::CreateAndReject(
NS_ERROR_DOM_MEDIA_WAITING_FOR_DATA, __func__);
}
mReset = false;
}
RefPtr<MediaRawData> sample;
if (mNextSample) {
sample = mNextSample.ref();
mNextSample.reset();
} else {
MediaResult result = NS_OK;
sample = mManager->GetSample(mType, MediaSourceDemuxer::EOS_FUZZ, result);
if (!sample) {
if (result == NS_ERROR_DOM_MEDIA_END_OF_STREAM ||
result == NS_ERROR_DOM_MEDIA_WAITING_FOR_DATA) {
return SamplesPromise::CreateAndReject(
(result == NS_ERROR_DOM_MEDIA_END_OF_STREAM && mManager->IsEnded())
? NS_ERROR_DOM_MEDIA_END_OF_STREAM
: NS_ERROR_DOM_MEDIA_WAITING_FOR_DATA, __func__);
}
return SamplesPromise::CreateAndReject(result, __func__);
}
}
RefPtr<SamplesHolder> samples = new SamplesHolder;
samples->mSamples.AppendElement(sample);
if (mNextRandomAccessPoint <= sample->mTime) {
MonitorAutoLock mon(mMonitor);
mNextRandomAccessPoint =
mManager->GetNextRandomAccessPoint(mType, MediaSourceDemuxer::EOS_FUZZ);
}
return SamplesPromise::CreateAndResolve(samples, __func__);
}