bool
MediaSourceDecoder::CanPlayThrough()
{
MOZ_ASSERT(NS_IsMainThread());
if (NextFrameBufferedStatus() == MediaDecoderOwner::NEXT_FRAME_UNAVAILABLE) {
return false;
}
if (IsNaN(mMediaSource->Duration())) {
// Don't have any data yet.
return false;
}
TimeUnit duration = TimeUnit::FromSeconds(mMediaSource->Duration());
TimeUnit currentPosition = TimeUnit::FromMicroseconds(CurrentPosition());
if (duration.IsInfinite()) {
// We can't make an informed decision and just assume that it's a live stream
return true;
} else if (duration <= currentPosition) {
return true;
}
// If we have data up to the mediasource's duration or 30s ahead, we can
// assume that we can play without interruption.
TimeUnit timeAhead =
std::min(duration, currentPosition + TimeUnit::FromSeconds(30));
TimeInterval interval(currentPosition,
timeAhead,
MediaSourceDemuxer::EOS_FUZZ);
return GetBuffered().Contains(ClampIntervalToEnd(interval));
}
media::TimeIntervals
MediaSourceDecoder::GetSeekable()
{
MOZ_ASSERT(NS_IsMainThread());
if (!mMediaSource) {
NS_WARNING("MediaSource element isn't attached");
return media::TimeIntervals::Invalid();
}
media::TimeIntervals seekable;
double duration = mMediaSource->Duration();
if (IsNaN(duration)) {
// Return empty range.
} else if (duration > 0 && mozilla::IsInfinite(duration)) {
media::TimeIntervals buffered = GetBuffered();
if (buffered.Length()) {
seekable +=
media::TimeInterval(media::TimeUnit::FromSeconds(0), buffered.GetEnd());
}
} else {
seekable += media::TimeInterval(media::TimeUnit::FromSeconds(0),
media::TimeUnit::FromSeconds(duration));
}
MSE_DEBUG("ranges=%s", DumpTimeRanges(seekable).get());
return seekable;
}
void
MediaDecoderReader::UpdateBuffered()
{
MOZ_ASSERT(OnTaskQueue());
NS_ENSURE_TRUE_VOID(!mShutdown);
mBuffered = GetBuffered();
}
double
SourceBuffer::GetBufferedEnd()
{
MOZ_ASSERT(NS_IsMainThread());
ErrorResult dummy;
nsRefPtr<TimeRanges> ranges = GetBuffered(dummy);
return ranges->Length() > 0 ? ranges->GetEndTime() : 0;
}
bool
SourceBufferDecoder::ContainsTime(double aTime)
{
ErrorResult dummy;
nsRefPtr<dom::TimeRanges> ranges = new dom::TimeRanges();
nsresult rv = GetBuffered(ranges);
if (NS_FAILED(rv) || ranges->Length() == 0) {
return false;
}
return ranges->Find(aTime) != dom::TimeRanges::NoIndex;
}
void
SourceBuffer::GetBufferedStartEndTime(double* aStart, double* aEnd)
{
ErrorResult dummy;
nsRefPtr<TimeRanges> ranges = GetBuffered(dummy);
if (!ranges || ranges->Length() == 0) {
*aStart = *aEnd = 0.0;
return;
}
*aStart = ranges->Start(0, dummy);
*aEnd = ranges->End(ranges->Length() - 1, dummy);
}
bool
SourceBuffer::ContainsTime(double aTime)
{
ErrorResult dummy;
nsRefPtr<TimeRanges> ranges = GetBuffered(dummy);
if (!ranges || ranges->Length() == 0) {
return false;
}
for (uint32_t i = 0; i < ranges->Length(); ++i) {
if (aTime >= ranges->Start(i, dummy) &&
aTime <= ranges->End(i, dummy)) {
return true;
}
}
return false;
}
MediaDecoderOwner::NextFrameStatus
MediaSourceDecoder::NextFrameBufferedStatus()
{
MOZ_ASSERT(NS_IsMainThread());
if (!mMediaSource ||
mMediaSource->ReadyState() == dom::MediaSourceReadyState::Closed) {
return MediaDecoderOwner::NEXT_FRAME_UNAVAILABLE;
}
// Next frame hasn't been decoded yet.
// Use the buffered range to consider if we have the next frame available.
TimeUnit currentPosition = TimeUnit::FromMicroseconds(CurrentPosition());
TimeInterval interval(currentPosition,
currentPosition + media::TimeUnit::FromMicroseconds(DEFAULT_NEXT_FRAME_AVAILABLE_BUFFERED),
MediaSourceDemuxer::EOS_FUZZ);
return GetBuffered().Contains(ClampIntervalToEnd(interval))
? MediaDecoderOwner::NEXT_FRAME_AVAILABLE
: MediaDecoderOwner::NEXT_FRAME_UNAVAILABLE;
}
media::TimeIntervals
MediaSourceDecoder::GetSeekable()
{
MOZ_ASSERT(NS_IsMainThread());
if (!mMediaSource) {
NS_WARNING("MediaSource element isn't attached");
return media::TimeIntervals::Invalid();
}
media::TimeIntervals seekable;
double duration = mMediaSource->Duration();
if (IsNaN(duration)) {
// Return empty range.
} else if (duration > 0 && mozilla::IsInfinite(duration)) {
media::TimeIntervals buffered = GetBuffered();
// 1. If live seekable range is not empty:
if (mMediaSource->HasLiveSeekableRange()) {
// 1. Let union ranges be the union of live seekable range and the
// HTMLMediaElement.buffered attribute.
media::TimeIntervals unionRanges =
buffered + mMediaSource->LiveSeekableRange();
// 2. Return a single range with a start time equal to the earliest start
// time in union ranges and an end time equal to the highest end time in
// union ranges and abort these steps.
seekable +=
media::TimeInterval(unionRanges.GetStart(), unionRanges.GetEnd());
return seekable;
}
if (buffered.Length()) {
seekable +=
media::TimeInterval(media::TimeUnit::FromSeconds(0), buffered.GetEnd());
}
} else {
seekable += media::TimeInterval(media::TimeUnit::FromSeconds(0),
media::TimeUnit::FromSeconds(duration));
}
MSE_DEBUG("ranges=%s", DumpTimeRanges(seekable).get());
return seekable;
}
