gecko-dev/dom/media/ReaderProxy.cpp

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Исходник Обычный вид История

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/MozPromise.h"
#include "MediaFormatReader.h"
#include "ReaderProxy.h"
#include "TimeUnits.h"
namespace mozilla {
ReaderProxy::ReaderProxy(AbstractThread* aOwnerThread,
MediaFormatReader* aReader)
: mOwnerThread(aOwnerThread)
, mReader(aReader)
, mWatchManager(this, aReader->OwnerThread())
, mDuration(aReader->OwnerThread(),
media::NullableTimeUnit(),
"ReaderProxy::mDuration (Mirror)")
, mSeamlessLoopingBlocked(false)
, mSeamlessLoopingEnabled(false)
{
// Must support either heuristic buffering or WaitForData().
MOZ_ASSERT(mReader->UseBufferingHeuristics() ||
mReader->IsWaitForDataSupported());
}
ReaderProxy::~ReaderProxy()
{}
media::TimeUnit
ReaderProxy::StartTime() const
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
return mStartTime.ref();
}
RefPtr<ReaderProxy::MetadataPromise>
ReaderProxy::ReadMetadata()
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
MOZ_ASSERT(!mShutdown);
return InvokeAsync(mReader->OwnerThread(),
mReader.get(),
__func__,
&MediaFormatReader::AsyncReadMetadata)
->Then(mOwnerThread,
__func__,
this,
&ReaderProxy::OnMetadataRead,
&ReaderProxy::OnMetadataNotRead);
}
RefPtr<ReaderProxy::AudioDataPromise>
ReaderProxy::OnAudioDataRequestCompleted(RefPtr<AudioData> aAudio)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
// Subtract the start time and add the looping-offset time.
int64_t offset =
StartTime().ToMicroseconds() - mLoopingOffset.ToMicroseconds();
aAudio->AdjustForStartTime(offset);
if (aAudio->mTime.IsValid()) {
mLastAudioEndTime = aAudio->mTime;
return AudioDataPromise::CreateAndResolve(aAudio.forget(), __func__);
}
return AudioDataPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_OVERFLOW_ERR,
__func__);
}
RefPtr<ReaderProxy::AudioDataPromise>
ReaderProxy::OnAudioDataRequestFailed(const MediaResult& aError)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
if (mSeamlessLoopingBlocked || !mSeamlessLoopingEnabled ||
aError.Code() != NS_ERROR_DOM_MEDIA_END_OF_STREAM) {
return AudioDataPromise::CreateAndReject(aError, __func__);
}
// The data time in the audio queue is assumed to be increased linearly,
// so we need to add the last ending time as the offset to correct the
// audio data time in the next round when seamless looping is enabled.
mLoopingOffset = mLastAudioEndTime;
// Save the duration of the audio track if it hasn't been set.
if (!mAudioDuration.IsValid()) {
mAudioDuration = mLastAudioEndTime;
}
// For seamless looping, the demuxer is sought to the beginning and then
// keep requesting decoded data in advance, upon receiving EOS.
// The MDSM will not be aware of the EOS and keep receiving decoded data
// as usual while looping is on.
RefPtr<ReaderProxy> self = this;
RefPtr<MediaFormatReader> reader = mReader;
ResetDecode(TrackInfo::kAudioTrack);
return SeekInternal(SeekTarget(media::TimeUnit::Zero(), SeekTarget::Accurate))
->Then(mReader->OwnerThread(),
__func__,
[reader]() { return reader->RequestAudioData(); },
[](const SeekRejectValue& aReject) {
return AudioDataPromise::CreateAndReject(aReject.mError, __func__);
})
->Then(mOwnerThread,
__func__,
[self](RefPtr<AudioData> aAudio) {
return self->OnAudioDataRequestCompleted(aAudio.forget());
},
[](const MediaResult& aError) {
return AudioDataPromise::CreateAndReject(aError, __func__);
});
}
RefPtr<ReaderProxy::AudioDataPromise>
ReaderProxy::RequestAudioData()
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
MOZ_ASSERT(!mShutdown);
mSeamlessLoopingBlocked = false;
return InvokeAsync(mReader->OwnerThread(),
mReader.get(),
__func__,
&MediaFormatReader::RequestAudioData)
->Then(mOwnerThread,
__func__,
this,
&ReaderProxy::OnAudioDataRequestCompleted,
&ReaderProxy::OnAudioDataRequestFailed);
}
RefPtr<ReaderProxy::VideoDataPromise>
ReaderProxy::RequestVideoData(const media::TimeUnit& aTimeThreshold)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
MOZ_ASSERT(!mShutdown);
mSeamlessLoopingBlocked = false;
const auto threshold = aTimeThreshold > media::TimeUnit::Zero()
? aTimeThreshold + StartTime()
: aTimeThreshold;
int64_t startTime = StartTime().ToMicroseconds();
return InvokeAsync(mReader->OwnerThread(),
mReader.get(),
__func__,
&MediaFormatReader::RequestVideoData,
threshold)
->Then(mOwnerThread,
__func__,
[startTime](RefPtr<VideoData> aVideo) {
aVideo->AdjustForStartTime(startTime);
return aVideo->mTime.IsValid()
? VideoDataPromise::CreateAndResolve(aVideo.forget(),
__func__)
: VideoDataPromise::CreateAndReject(
NS_ERROR_DOM_MEDIA_OVERFLOW_ERR, __func__);
},
[](const MediaResult& aError) {
return VideoDataPromise::CreateAndReject(aError, __func__);
});
}
RefPtr<ReaderProxy::SeekPromise>
ReaderProxy::Seek(const SeekTarget& aTarget)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
mSeamlessLoopingBlocked = true;
// Reset the members for seamless looping if the seek is triggered outside.
mLoopingOffset = media::TimeUnit::Zero();
mLastAudioEndTime = media::TimeUnit::Zero();
mAudioDuration = media::TimeUnit::Invalid();
return SeekInternal(aTarget);
}
RefPtr<ReaderProxy::SeekPromise>
ReaderProxy::SeekInternal(const SeekTarget& aTarget)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
SeekTarget adjustedTarget = aTarget;
adjustedTarget.SetTime(adjustedTarget.GetTime() + StartTime());
return InvokeAsync(mReader->OwnerThread(),
mReader.get(),
__func__,
&MediaFormatReader::Seek,
Move(adjustedTarget));
}
RefPtr<ReaderProxy::WaitForDataPromise>
ReaderProxy::WaitForData(MediaData::Type aType)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
MOZ_ASSERT(mReader->IsWaitForDataSupported());
return InvokeAsync(mReader->OwnerThread(),
mReader.get(),
__func__,
&MediaFormatReader::WaitForData,
aType);
}
void
ReaderProxy::ReleaseResources()
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
nsCOMPtr<nsIRunnable> r =
NewRunnableMethod("MediaFormatReader::ReleaseResources",
mReader,
&MediaFormatReader::ReleaseResources);
nsresult rv = mReader->OwnerThread()->Dispatch(r.forget());
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
Unused << rv;
}
void
ReaderProxy::ResetDecode(TrackSet aTracks)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
nsCOMPtr<nsIRunnable> r =
NewRunnableMethod<TrackSet>("MediaFormatReader::ResetDecode",
mReader,
&MediaFormatReader::ResetDecode,
aTracks);
nsresult rv = mReader->OwnerThread()->Dispatch(r.forget());
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
Unused << rv;
}
RefPtr<ShutdownPromise>
ReaderProxy::Shutdown()
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
mShutdown = true;
RefPtr<ReaderProxy> self = this;
return InvokeAsync(mReader->OwnerThread(), __func__, [self]() {
self->mDuration.DisconnectIfConnected();
self->mWatchManager.Shutdown();
return self->mReader->Shutdown();
});
}
RefPtr<ReaderProxy::MetadataPromise>
ReaderProxy::OnMetadataRead(MetadataHolder&& aMetadata)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
if (mShutdown) {
return MetadataPromise::CreateAndReject(
NS_ERROR_DOM_MEDIA_ABORT_ERR, __func__);
}
if (mStartTime.isNothing()) {
mStartTime.emplace(aMetadata.mInfo->mStartTime);
}
return MetadataPromise::CreateAndResolve(Move(aMetadata), __func__);
}
RefPtr<ReaderProxy::MetadataPromise>
ReaderProxy::OnMetadataNotRead(const MediaResult& aError)
{
return MetadataPromise::CreateAndReject(aError, __func__);
}
void
ReaderProxy::SetVideoBlankDecode(bool aIsBlankDecode)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
nsCOMPtr<nsIRunnable> r =
NewRunnableMethod<bool>("MediaFormatReader::SetVideoNullDecode",
mReader,
&MediaFormatReader::SetVideoNullDecode,
aIsBlankDecode);
nsresult rv = mReader->OwnerThread()->Dispatch(r.forget());
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
Unused << rv;
}
void
ReaderProxy::UpdateDuration()
{
MOZ_ASSERT(mReader->OwnerThread()->IsCurrentThreadIn());
mReader->UpdateDuration(mDuration.Ref().ref());
}
void
ReaderProxy::SetCanonicalDuration(
AbstractCanonical<media::NullableTimeUnit>* aCanonical)
{
using DurationT = AbstractCanonical<media::NullableTimeUnit>;
RefPtr<ReaderProxy> self = this;
RefPtr<DurationT> canonical = aCanonical;
nsCOMPtr<nsIRunnable> r = NS_NewRunnableFunction(
"ReaderProxy::SetCanonicalDuration", [this, self, canonical]() {
mDuration.Connect(canonical);
mWatchManager.Watch(mDuration, &ReaderProxy::UpdateDuration);
});
nsresult rv = mReader->OwnerThread()->Dispatch(r.forget());
MOZ_DIAGNOSTIC_ASSERT(NS_SUCCEEDED(rv));
Unused << rv;
}
void
ReaderProxy::SetSeamlessLoopingEnabled(bool aEnabled)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
mSeamlessLoopingEnabled = aEnabled;
}
void
ReaderProxy::AdjustByLooping(media::TimeUnit& aTime)
{
MOZ_ASSERT(mOwnerThread->IsCurrentThreadIn());
MOZ_ASSERT(!mShutdown);
MOZ_ASSERT(!mSeamlessLoopingEnabled || !mSeamlessLoopingBlocked);
if (mAudioDuration.IsValid() && mAudioDuration.IsPositive()) {
aTime = aTime % mAudioDuration.ToMicroseconds();
}
}
} // namespace mozilla