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gecko-dev/dom/media/mediasink/DecodedStream.cpp

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/* -*- 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 "DecodedStream.h"
#include "AudioDecoderInputTrack.h"
#include "AudioSegment.h"
#include "MediaData.h"
#include "MediaDecoderStateMachine.h"
#include "MediaQueue.h"
#include "MediaTrackGraph.h"
#include "MediaTrackListener.h"
#include "SharedBuffer.h"
#include "Tracing.h"
#include "VideoSegment.h"
#include "VideoUtils.h"
#include "mozilla/AbstractThread.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/ProfilerLabels.h"
#include "mozilla/ProfilerMarkerTypes.h"
#include "mozilla/SyncRunnable.h"
#include "mozilla/gfx/Point.h"
#include "mozilla/StaticPrefs_dom.h"
#include "nsProxyRelease.h"
namespace mozilla {
using media::NullableTimeUnit;
using media::TimeUnit;
extern LazyLogModule gMediaDecoderLog;
#define LOG_DS(type, fmt, ...) \
MOZ_LOG(gMediaDecoderLog, type, \
("DecodedStream=%p " fmt, this, ##__VA_ARGS__))
#define PLAYBACK_PROFILER_MARKER(markerString) \
PROFILER_MARKER_TEXT(FUNCTION_SIGNATURE, MEDIA_PLAYBACK, {}, markerString)
/*
* A container class to make it easier to pass the playback info all the
* way to DecodedStreamGraphListener from DecodedStream.
*/
struct PlaybackInfoInit {
TimeUnit mStartTime;
MediaInfo mInfo;
};
class DecodedStreamGraphListener;
class SourceVideoTrackListener : public MediaTrackListener {
public:
SourceVideoTrackListener(DecodedStreamGraphListener* aGraphListener,
SourceMediaTrack* aVideoTrack,
MediaTrack* aAudioTrack,
nsISerialEventTarget* aDecoderThread);
void NotifyOutput(MediaTrackGraph* aGraph,
TrackTime aCurrentTrackTime) override;
void NotifyEnded(MediaTrackGraph* aGraph) override;
private:
const RefPtr<DecodedStreamGraphListener> mGraphListener;
const RefPtr<SourceMediaTrack> mVideoTrack;
const RefPtr<const MediaTrack> mAudioTrack;
const RefPtr<nsISerialEventTarget> mDecoderThread;
TrackTime mLastVideoOutputTime = 0;
};
class DecodedStreamGraphListener {
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(DecodedStreamGraphListener)
public:
DecodedStreamGraphListener(
nsISerialEventTarget* aDecoderThread, AudioDecoderInputTrack* aAudioTrack,
MozPromiseHolder<DecodedStream::EndedPromise>&& aAudioEndedHolder,
SourceMediaTrack* aVideoTrack,
MozPromiseHolder<DecodedStream::EndedPromise>&& aVideoEndedHolder)
: mDecoderThread(aDecoderThread),
mVideoTrackListener(
aVideoTrack ? MakeRefPtr<SourceVideoTrackListener>(
this, aVideoTrack, aAudioTrack, aDecoderThread)
: nullptr),
mAudioEndedHolder(std::move(aAudioEndedHolder)),
mVideoEndedHolder(std::move(aVideoEndedHolder)),
mAudioTrack(aAudioTrack),
mVideoTrack(aVideoTrack) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mDecoderThread);
if (mAudioTrack) {
mOnAudioOutput = mAudioTrack->OnOutput().Connect(
mDecoderThread,
[self = RefPtr<DecodedStreamGraphListener>(this)](TrackTime aTime) {
self->NotifyOutput(MediaSegment::AUDIO, aTime);
});
mOnAudioEnd = mAudioTrack->OnEnd().Connect(
mDecoderThread, [self = RefPtr<DecodedStreamGraphListener>(this)]() {
self->NotifyEnded(MediaSegment::AUDIO);
});
} else {
mAudioEnded = true;
mAudioEndedHolder.ResolveIfExists(true, __func__);
}
if (mVideoTrackListener) {
mVideoTrack->AddListener(mVideoTrackListener);
} else {
mVideoEnded = true;
mVideoEndedHolder.ResolveIfExists(true, __func__);
}
}
void Close() {
AssertOnDecoderThread();
if (mAudioTrack) {
mAudioTrack->Close();
}
if (mVideoTrack) {
mVideoTrack->End();
}
mAudioEndedHolder.ResolveIfExists(false, __func__);
mVideoEndedHolder.ResolveIfExists(false, __func__);
mOnAudioOutput.DisconnectIfExists();
mOnAudioEnd.DisconnectIfExists();
}
void NotifyOutput(MediaSegment::Type aType, TrackTime aCurrentTrackTime) {
AssertOnDecoderThread();
if (aType == MediaSegment::AUDIO) {
mAudioOutputFrames = aCurrentTrackTime;
} else if (aType == MediaSegment::VIDEO) {
if (aCurrentTrackTime >= mVideoEndTime) {
mVideoTrack->End();
}
} else {
MOZ_CRASH("Unexpected track type");
}
MOZ_ASSERT_IF(aType == MediaSegment::AUDIO, !mAudioEnded);
MOZ_ASSERT_IF(aType == MediaSegment::VIDEO, !mVideoEnded);
// This situation would happen when playing audio in >1x playback rate,
// because the audio output clock isn't align the graph time and would go
// forward faster. Eg. playback rate=2, when the graph time passes 10s, the
// audio clock time actually already goes forward 20s. After audio track
// ended, video track would tirgger the clock, but the video time still
// follows the graph time, which is smaller than the preivous audio clock
// time and should be ignored.
if (aCurrentTrackTime <= mLastOutputTime) {
MOZ_ASSERT(aType == MediaSegment::VIDEO);
return;
}
MOZ_ASSERT(aCurrentTrackTime > mLastOutputTime);
mLastOutputTime = aCurrentTrackTime;
// Only when audio track doesn't exists or has reached the end, video
// track should drive the clock.
MOZ_ASSERT_IF(aType == MediaSegment::VIDEO, mAudioEnded);
const MediaTrack* track = aType == MediaSegment::VIDEO
? static_cast<MediaTrack*>(mVideoTrack)
: static_cast<MediaTrack*>(mAudioTrack);
mOnOutput.Notify(track->TrackTimeToMicroseconds(aCurrentTrackTime));
}
void NotifyEnded(MediaSegment::Type aType) {
AssertOnDecoderThread();
if (aType == MediaSegment::AUDIO) {
MOZ_ASSERT(!mAudioEnded);
mAudioEnded = true;
mAudioEndedHolder.ResolveIfExists(true, __func__);
} else if (aType == MediaSegment::VIDEO) {
MOZ_ASSERT(!mVideoEnded);
mVideoEnded = true;
mVideoEndedHolder.ResolveIfExists(true, __func__);
} else {
MOZ_CRASH("Unexpected track type");
}
}
/**
* Tell the graph listener to end the track sourced by the given track after
* it has seen at least aEnd worth of output reported as processed by the
* graph.
*
* A TrackTime of TRACK_TIME_MAX indicates that the track has no end and is
* the default.
*
* This method of ending tracks is needed because the MediaTrackGraph
* processes ended tracks (through SourceMediaTrack::EndTrack) at the
* beginning of an iteration, but waits until the end of the iteration to
* process any ControlMessages. When such a ControlMessage is a listener that
* is to be added to a track that has ended in its very first iteration, the
* track ends before the listener tracking this ending is added. This can lead
* to a MediaStreamTrack ending on main thread (it uses another listener)
* before the listeners to render the track get added, potentially meaning a
* media element doesn't progress before reaching the end although data was
* available.
*/
void EndVideoTrackAt(MediaTrack* aTrack, TrackTime aEnd) {
AssertOnDecoderThread();
MOZ_DIAGNOSTIC_ASSERT(aTrack == mVideoTrack);
mVideoEndTime = aEnd;
}
void Forget() {
MOZ_ASSERT(NS_IsMainThread());
if (mVideoTrackListener && !mVideoTrack->IsDestroyed()) {
mVideoTrack->RemoveListener(mVideoTrackListener);
}
mVideoTrackListener = nullptr;
}
TrackTime GetAudioFramesPlayed() {
AssertOnDecoderThread();
return mAudioOutputFrames;
}
MediaEventSource<int64_t>& OnOutput() { return mOnOutput; }
private:
~DecodedStreamGraphListener() {
MOZ_ASSERT(mAudioEndedHolder.IsEmpty());
MOZ_ASSERT(mVideoEndedHolder.IsEmpty());
}
inline void AssertOnDecoderThread() const {
MOZ_ASSERT(mDecoderThread->IsOnCurrentThread());
}
const RefPtr<nsISerialEventTarget> mDecoderThread;
// Accessible on any thread, but only notify on the decoder thread.
MediaEventProducer<int64_t> mOnOutput;
RefPtr<SourceVideoTrackListener> mVideoTrackListener;
// These can be resolved on the main thread on creation if there is no
// corresponding track, otherwise they are resolved on the decoder thread.
MozPromiseHolder<DecodedStream::EndedPromise> mAudioEndedHolder;
MozPromiseHolder<DecodedStream::EndedPromise> mVideoEndedHolder;
// Decoder thread only.
TrackTime mAudioOutputFrames = 0;
TrackTime mLastOutputTime = 0;
bool mAudioEnded = false;
bool mVideoEnded = false;
// Any thread.
const RefPtr<AudioDecoderInputTrack> mAudioTrack;
const RefPtr<SourceMediaTrack> mVideoTrack;
MediaEventListener mOnAudioOutput;
MediaEventListener mOnAudioEnd;
Atomic<TrackTime> mVideoEndTime{TRACK_TIME_MAX};
};
SourceVideoTrackListener::SourceVideoTrackListener(
DecodedStreamGraphListener* aGraphListener, SourceMediaTrack* aVideoTrack,
MediaTrack* aAudioTrack, nsISerialEventTarget* aDecoderThread)
: mGraphListener(aGraphListener),
mVideoTrack(aVideoTrack),
mAudioTrack(aAudioTrack),
mDecoderThread(aDecoderThread) {}
void SourceVideoTrackListener::NotifyOutput(MediaTrackGraph* aGraph,
TrackTime aCurrentTrackTime) {
aGraph->AssertOnGraphThreadOrNotRunning();
if (mAudioTrack && !mAudioTrack->Ended()) {
// Only audio playout drives the clock forward, if present and live.
return;
}
// The graph can iterate without time advancing, but the invariant is that
// time can never go backwards.
if (aCurrentTrackTime <= mLastVideoOutputTime) {
MOZ_ASSERT(aCurrentTrackTime == mLastVideoOutputTime);
return;
}
mLastVideoOutputTime = aCurrentTrackTime;
mDecoderThread->Dispatch(NS_NewRunnableFunction(
"SourceVideoTrackListener::NotifyOutput",
[self = RefPtr<SourceVideoTrackListener>(this), aCurrentTrackTime]() {
self->mGraphListener->NotifyOutput(MediaSegment::VIDEO,
aCurrentTrackTime);
}));
}
void SourceVideoTrackListener::NotifyEnded(MediaTrackGraph* aGraph) {
aGraph->AssertOnGraphThreadOrNotRunning();
mDecoderThread->Dispatch(NS_NewRunnableFunction(
"SourceVideoTrackListener::NotifyEnded",
[self = RefPtr<SourceVideoTrackListener>(this)]() {
self->mGraphListener->NotifyEnded(MediaSegment::VIDEO);
}));
}
/**
* All MediaStream-related data is protected by the decoder's monitor. We have
* at most one DecodedStreamData per MediaDecoder. XXX Its tracks are used as
* inputs for all output tracks created by OutputStreamManager after calls to
* captureStream/UntilEnded. Seeking creates new source tracks, as does
* replaying after the input as ended. In the latter case, the new sources are
* not connected to tracks created by captureStreamUntilEnded.
*/
class DecodedStreamData final {
public:
DecodedStreamData(
PlaybackInfoInit&& aInit, MediaTrackGraph* aGraph,
RefPtr<ProcessedMediaTrack> aAudioOutputTrack,
RefPtr<ProcessedMediaTrack> aVideoOutputTrack,
MozPromiseHolder<DecodedStream::EndedPromise>&& aAudioEndedPromise,
MozPromiseHolder<DecodedStream::EndedPromise>&& aVideoEndedPromise,
float aPlaybackRate, float aVolume, bool aPreservesPitch,
nsISerialEventTarget* aDecoderThread);
~DecodedStreamData();
MediaEventSource<int64_t>& OnOutput();
// This is used to mark track as closed and should be called before Forget().
// Decoder thread only.
void Close();
// After calling this function, the DecodedStreamData would be destroyed.
// Main thread only.
void Forget();
void GetDebugInfo(dom::DecodedStreamDataDebugInfo& aInfo);
void WriteVideoToSegment(layers::Image* aImage, const TimeUnit& aStart,
const TimeUnit& aEnd,
const gfx::IntSize& aIntrinsicSize,
const TimeStamp& aTimeStamp, VideoSegment* aOutput,
const PrincipalHandle& aPrincipalHandle,
double aPlaybackRate);
/* The following group of fields are protected by the decoder's monitor
* and can be read or written on any thread.
*/
// Count of audio frames written to the track
int64_t mAudioFramesWritten;
// Count of video frames written to the track in the track's rate
TrackTime mVideoTrackWritten;
// mNextAudioTime is the end timestamp for the last packet sent to the track.
// Therefore audio packets starting at or after this time need to be copied
// to the output track.
TimeUnit mNextAudioTime;
// mLastVideoStartTime is the start timestamp for the last packet sent to the
// track. Therefore video packets starting after this time need to be copied
// to the output track.
NullableTimeUnit mLastVideoStartTime;
// mLastVideoEndTime is the end timestamp for the last packet sent to the
// track. It is used to adjust durations of chunks sent to the output track
// when there are overlaps in VideoData.
NullableTimeUnit mLastVideoEndTime;
// The timestamp of the last frame, so we can ensure time never goes
// backwards.
TimeStamp mLastVideoTimeStamp;
// The last video image sent to the track. Useful if we need to replicate
// the image.
RefPtr<layers::Image> mLastVideoImage;
gfx::IntSize mLastVideoImageDisplaySize;
bool mHaveSentFinishAudio;
bool mHaveSentFinishVideo;
const RefPtr<AudioDecoderInputTrack> mAudioTrack;
const RefPtr<SourceMediaTrack> mVideoTrack;
const RefPtr<ProcessedMediaTrack> mAudioOutputTrack;
const RefPtr<ProcessedMediaTrack> mVideoOutputTrack;
const RefPtr<MediaInputPort> mAudioPort;
const RefPtr<MediaInputPort> mVideoPort;
const RefPtr<DecodedStream::EndedPromise> mAudioEndedPromise;
const RefPtr<DecodedStream::EndedPromise> mVideoEndedPromise;
const RefPtr<DecodedStreamGraphListener> mListener;
};
DecodedStreamData::DecodedStreamData(
PlaybackInfoInit&& aInit, MediaTrackGraph* aGraph,
RefPtr<ProcessedMediaTrack> aAudioOutputTrack,
RefPtr<ProcessedMediaTrack> aVideoOutputTrack,
MozPromiseHolder<DecodedStream::EndedPromise>&& aAudioEndedPromise,
MozPromiseHolder<DecodedStream::EndedPromise>&& aVideoEndedPromise,
float aPlaybackRate, float aVolume, bool aPreservesPitch,
nsISerialEventTarget* aDecoderThread)
: mAudioFramesWritten(0),
mVideoTrackWritten(0),
mNextAudioTime(aInit.mStartTime),
mHaveSentFinishAudio(false),
mHaveSentFinishVideo(false),
mAudioTrack(aInit.mInfo.HasAudio()
? AudioDecoderInputTrack::Create(
aGraph, aDecoderThread, aInit.mInfo.mAudio,
aPlaybackRate, aVolume, aPreservesPitch)
: nullptr),
mVideoTrack(aInit.mInfo.HasVideo()
? aGraph->CreateSourceTrack(MediaSegment::VIDEO)
: nullptr),
mAudioOutputTrack(std::move(aAudioOutputTrack)),
mVideoOutputTrack(std::move(aVideoOutputTrack)),
mAudioPort((mAudioOutputTrack && mAudioTrack)
? mAudioOutputTrack->AllocateInputPort(mAudioTrack)
: nullptr),
mVideoPort((mVideoOutputTrack && mVideoTrack)
? mVideoOutputTrack->AllocateInputPort(mVideoTrack)
: nullptr),
mAudioEndedPromise(aAudioEndedPromise.Ensure(__func__)),
mVideoEndedPromise(aVideoEndedPromise.Ensure(__func__)),
// DecodedStreamGraphListener will resolve these promises.
mListener(MakeRefPtr<DecodedStreamGraphListener>(
aDecoderThread, mAudioTrack, std::move(aAudioEndedPromise),
mVideoTrack, std::move(aVideoEndedPromise))) {
MOZ_ASSERT(NS_IsMainThread());
}
DecodedStreamData::~DecodedStreamData() {
MOZ_ASSERT(NS_IsMainThread());
if (mAudioTrack) {
mAudioTrack->Destroy();
}
if (mVideoTrack) {
mVideoTrack->Destroy();
}
if (mAudioPort) {
mAudioPort->Destroy();
}
if (mVideoPort) {
mVideoPort->Destroy();
}
}
MediaEventSource<int64_t>& DecodedStreamData::OnOutput() {
return mListener->OnOutput();
}
void DecodedStreamData::Close() { mListener->Close(); }
void DecodedStreamData::Forget() { mListener->Forget(); }
void DecodedStreamData::GetDebugInfo(dom::DecodedStreamDataDebugInfo& aInfo) {
CopyUTF8toUTF16(nsPrintfCString("%p", this), aInfo.mInstance);
aInfo.mAudioFramesWritten = mAudioFramesWritten;
aInfo.mStreamAudioWritten = mListener->GetAudioFramesPlayed();
aInfo.mNextAudioTime = mNextAudioTime.ToMicroseconds();
aInfo.mLastVideoStartTime =
mLastVideoStartTime.valueOr(TimeUnit::FromMicroseconds(-1))
.ToMicroseconds();
aInfo.mLastVideoEndTime =
mLastVideoEndTime.valueOr(TimeUnit::FromMicroseconds(-1))
.ToMicroseconds();
aInfo.mHaveSentFinishAudio = mHaveSentFinishAudio;
aInfo.mHaveSentFinishVideo = mHaveSentFinishVideo;
}
DecodedStream::DecodedStream(
MediaDecoderStateMachine* aStateMachine,
nsMainThreadPtrHandle<SharedDummyTrack> aDummyTrack,
CopyableTArray<RefPtr<ProcessedMediaTrack>> aOutputTracks, double aVolume,
double aPlaybackRate, bool aPreservesPitch,
MediaQueue<AudioData>& aAudioQueue, MediaQueue<VideoData>& aVideoQueue)
: mOwnerThread(aStateMachine->OwnerThread()),
mDummyTrack(std::move(aDummyTrack)),
mWatchManager(this, mOwnerThread),
mPlaying(false, "DecodedStream::mPlaying"),
mPrincipalHandle(aStateMachine->OwnerThread(), PRINCIPAL_HANDLE_NONE,
"DecodedStream::mPrincipalHandle (Mirror)"),
mCanonicalOutputPrincipal(aStateMachine->CanonicalOutputPrincipal()),
mOutputTracks(std::move(aOutputTracks)),
mVolume(aVolume),
mPlaybackRate(aPlaybackRate),
mPreservesPitch(aPreservesPitch),
mAudioQueue(aAudioQueue),
mVideoQueue(aVideoQueue) {}
DecodedStream::~DecodedStream() {
MOZ_ASSERT(mStartTime.isNothing(), "playback should've ended.");
}
RefPtr<DecodedStream::EndedPromise> DecodedStream::OnEnded(TrackType aType) {
AssertOwnerThread();
MOZ_ASSERT(mStartTime.isSome());
if (aType == TrackInfo::kAudioTrack && mInfo.HasAudio()) {
return mAudioEndedPromise;
} else if (aType == TrackInfo::kVideoTrack && mInfo.HasVideo()) {
return mVideoEndedPromise;
}
return nullptr;
}
nsresult DecodedStream::Start(const TimeUnit& aStartTime,
const MediaInfo& aInfo) {
AssertOwnerThread();
MOZ_ASSERT(mStartTime.isNothing(), "playback already started.");
AUTO_PROFILER_LABEL(FUNCTION_SIGNATURE, MEDIA_PLAYBACK);
if (profiler_thread_is_being_profiled_for_markers()) {
nsPrintfCString markerString("StartTime=%" PRId64,
aStartTime.ToMicroseconds());
PLAYBACK_PROFILER_MARKER(markerString);
}
LOG_DS(LogLevel::Debug, "Start() mStartTime=%" PRId64,
aStartTime.ToMicroseconds());
mStartTime.emplace(aStartTime);
mLastOutputTime = TimeUnit::Zero();
mInfo = aInfo;
mPlaying = true;
mPrincipalHandle.Connect(mCanonicalOutputPrincipal);
mWatchManager.Watch(mPlaying, &DecodedStream::PlayingChanged);
mAudibilityMonitor.emplace(
mInfo.mAudio.mRate,
StaticPrefs::dom_media_silence_duration_for_audibility());
ConnectListener();
class R : public Runnable {
public:
R(PlaybackInfoInit&& aInit,
nsMainThreadPtrHandle<SharedDummyTrack> aDummyTrack,
nsTArray<RefPtr<ProcessedMediaTrack>> aOutputTracks,
MozPromiseHolder<MediaSink::EndedPromise>&& aAudioEndedPromise,
MozPromiseHolder<MediaSink::EndedPromise>&& aVideoEndedPromise,
float aPlaybackRate, float aVolume, bool aPreservesPitch,
nsISerialEventTarget* aDecoderThread)
: Runnable("CreateDecodedStreamData"),
mInit(std::move(aInit)),
mDummyTrack(std::move(aDummyTrack)),
mOutputTracks(std::move(aOutputTracks)),
mAudioEndedPromise(std::move(aAudioEndedPromise)),
mVideoEndedPromise(std::move(aVideoEndedPromise)),
mPlaybackRate(aPlaybackRate),
mVolume(aVolume),
mPreservesPitch(aPreservesPitch),
mDecoderThread(aDecoderThread) {}
NS_IMETHOD Run() override {
MOZ_ASSERT(NS_IsMainThread());
RefPtr<ProcessedMediaTrack> audioOutputTrack;
RefPtr<ProcessedMediaTrack> videoOutputTrack;
for (const auto& track : mOutputTracks) {
if (track->mType == MediaSegment::AUDIO) {
MOZ_DIAGNOSTIC_ASSERT(
!audioOutputTrack,
"We only support capturing to one output track per kind");
audioOutputTrack = track;
} else if (track->mType == MediaSegment::VIDEO) {
MOZ_DIAGNOSTIC_ASSERT(
!videoOutputTrack,
"We only support capturing to one output track per kind");
videoOutputTrack = track;
} else {
MOZ_CRASH("Unknown media type");
}
}
if (!mDummyTrack) {
// No dummy track - no graph. This could be intentional as the owning
// media element needs access to the tracks on main thread to set up
// forwarding of them before playback starts. MDSM will re-create
// DecodedStream once a dummy track is available. This effectively halts
// playback for this DecodedStream.
return NS_OK;
}
if ((audioOutputTrack && audioOutputTrack->IsDestroyed()) ||
(videoOutputTrack && videoOutputTrack->IsDestroyed())) {
// A track has been destroyed and we'll soon get re-created with a
// proper one. This effectively halts playback for this DecodedStream.
return NS_OK;
}
mData = MakeUnique<DecodedStreamData>(
std::move(mInit), mDummyTrack->mTrack->Graph(),
std::move(audioOutputTrack), std::move(videoOutputTrack),
std::move(mAudioEndedPromise), std::move(mVideoEndedPromise),
mPlaybackRate, mVolume, mPreservesPitch, mDecoderThread);
return NS_OK;
}
UniquePtr<DecodedStreamData> ReleaseData() { return std::move(mData); }
private:
PlaybackInfoInit mInit;
nsMainThreadPtrHandle<SharedDummyTrack> mDummyTrack;
const nsTArray<RefPtr<ProcessedMediaTrack>> mOutputTracks;
MozPromiseHolder<MediaSink::EndedPromise> mAudioEndedPromise;
MozPromiseHolder<MediaSink::EndedPromise> mVideoEndedPromise;
UniquePtr<DecodedStreamData> mData;
const float mPlaybackRate;
const float mVolume;
const bool mPreservesPitch;
const RefPtr<nsISerialEventTarget> mDecoderThread;
};
MozPromiseHolder<DecodedStream::EndedPromise> audioEndedHolder;
MozPromiseHolder<DecodedStream::EndedPromise> videoEndedHolder;
PlaybackInfoInit init{aStartTime, aInfo};
nsCOMPtr<nsIRunnable> r =
new R(std::move(init), mDummyTrack, mOutputTracks.Clone(),
std::move(audioEndedHolder), std::move(videoEndedHolder),
static_cast<float>(mPlaybackRate), static_cast<float>(mVolume),
mPreservesPitch, mOwnerThread);
SyncRunnable::DispatchToThread(GetMainThreadSerialEventTarget(), r);
mData = static_cast<R*>(r.get())->ReleaseData();
if (mData) {
mAudioEndedPromise = mData->mAudioEndedPromise;
mVideoEndedPromise = mData->mVideoEndedPromise;
mOutputListener = mData->OnOutput().Connect(mOwnerThread, this,
&DecodedStream::NotifyOutput);
SendData();
}
return NS_OK;
}
void DecodedStream::Stop() {
AssertOwnerThread();
MOZ_ASSERT(mStartTime.isSome(), "playback not started.");
TRACE("DecodedStream::Stop");
LOG_DS(LogLevel::Debug, "Stop()");
DisconnectListener();
ResetVideo(mPrincipalHandle);
ResetAudio();
mStartTime.reset();
mAudioEndedPromise = nullptr;
mVideoEndedPromise = nullptr;
// Clear mData immediately when this playback session ends so we won't
// send data to the wrong track in SendData() in next playback session.
DestroyData(std::move(mData));
mPrincipalHandle.DisconnectIfConnected();
mWatchManager.Unwatch(mPlaying, &DecodedStream::PlayingChanged);
mAudibilityMonitor.reset();
}
bool DecodedStream::IsStarted() const {
AssertOwnerThread();
return mStartTime.isSome();
}
bool DecodedStream::IsPlaying() const {
AssertOwnerThread();
return IsStarted() && mPlaying;
}
void DecodedStream::Shutdown() {
AssertOwnerThread();
mPrincipalHandle.DisconnectIfConnected();
mWatchManager.Shutdown();
}
void DecodedStream::DestroyData(UniquePtr<DecodedStreamData>&& aData) {
AssertOwnerThread();
if (!aData) {
return;
}
TRACE("DecodedStream::DestroyData");
mOutputListener.Disconnect();
aData->Close();
NS_DispatchToMainThread(
NS_NewRunnableFunction("DecodedStream::DestroyData",
[data = std::move(aData)]() { data->Forget(); }));
}
void DecodedStream::SetPlaying(bool aPlaying) {
AssertOwnerThread();
// Resume/pause matters only when playback started.
if (mStartTime.isNothing()) {
return;
}
if (profiler_thread_is_being_profiled_for_markers()) {
nsPrintfCString markerString("Playing=%s", aPlaying ? "true" : "false");
PLAYBACK_PROFILER_MARKER(markerString);
}
LOG_DS(LogLevel::Debug, "playing (%d) -> (%d)", mPlaying.Ref(), aPlaying);
mPlaying = aPlaying;
}
void DecodedStream::SetVolume(double aVolume) {
AssertOwnerThread();
if (profiler_thread_is_being_profiled_for_markers()) {
nsPrintfCString markerString("Volume=%f", aVolume);
PLAYBACK_PROFILER_MARKER(markerString);
}
if (mVolume == aVolume) {
return;
}
mVolume = aVolume;
if (mData && mData->mAudioTrack) {
mData->mAudioTrack->SetVolume(static_cast<float>(aVolume));
}
}
void DecodedStream::SetPlaybackRate(double aPlaybackRate) {
AssertOwnerThread();
if (profiler_thread_is_being_profiled_for_markers()) {
nsPrintfCString markerString("PlaybackRate=%f", aPlaybackRate);
PLAYBACK_PROFILER_MARKER(markerString);
}
if (mPlaybackRate == aPlaybackRate) {
return;
}
mPlaybackRate = aPlaybackRate;
if (mData && mData->mAudioTrack) {
mData->mAudioTrack->SetPlaybackRate(static_cast<float>(aPlaybackRate));
}
}
void DecodedStream::SetPreservesPitch(bool aPreservesPitch) {
AssertOwnerThread();
if (profiler_thread_is_being_profiled_for_markers()) {
nsPrintfCString markerString("PreservesPitch=%s",
aPreservesPitch ? "true" : "false");
PLAYBACK_PROFILER_MARKER(markerString);
}
if (mPreservesPitch == aPreservesPitch) {
return;
}
mPreservesPitch = aPreservesPitch;
if (mData && mData->mAudioTrack) {
mData->mAudioTrack->SetPreservesPitch(aPreservesPitch);
}
}
double DecodedStream::PlaybackRate() const {
AssertOwnerThread();
return mPlaybackRate;
}
void DecodedStream::SendAudio(const PrincipalHandle& aPrincipalHandle) {
AssertOwnerThread();
if (!mInfo.HasAudio()) {
return;
}
if (mData->mHaveSentFinishAudio) {
return;
}
TRACE("DecodedStream::SendAudio");
// It's OK to hold references to the AudioData because AudioData
// is ref-counted.
AutoTArray<RefPtr<AudioData>, 10> audio;
mAudioQueue.GetElementsAfter(mData->mNextAudioTime, &audio);
// This will happen everytime when the media sink switches from `AudioSink` to
// `DecodedStream`. If we don't insert the silence then the A/V will be out of
// sync.
RefPtr<AudioData> nextAudio = audio.IsEmpty() ? nullptr : audio[0];
if (RefPtr<AudioData> silence = CreateSilenceDataIfGapExists(nextAudio)) {
LOG_DS(LogLevel::Verbose, "Detect a gap in audio, insert silence=%u",
silence->Frames());
audio.InsertElementAt(0, silence);
}
// Append data which hasn't been sent to audio track before.
mData->mAudioTrack->AppendData(audio, aPrincipalHandle);
for (uint32_t i = 0; i < audio.Length(); ++i) {
CheckIsDataAudible(audio[i]);
mData->mNextAudioTime = audio[i]->GetEndTime();
mData->mAudioFramesWritten += audio[i]->Frames();
}
if (mAudioQueue.IsFinished() && !mData->mHaveSentFinishAudio) {
mData->mAudioTrack->NotifyEndOfStream();
mData->mHaveSentFinishAudio = true;
}
}
already_AddRefed<AudioData> DecodedStream::CreateSilenceDataIfGapExists(
RefPtr<AudioData>& aNextAudio) {
AssertOwnerThread();
if (!aNextAudio) {
return nullptr;
}
CheckedInt64 audioWrittenOffset =
mData->mAudioFramesWritten +
TimeUnitToFrames(*mStartTime, aNextAudio->mRate);
CheckedInt64 frameOffset =
TimeUnitToFrames(aNextAudio->mTime, aNextAudio->mRate);
if (audioWrittenOffset.value() >= frameOffset.value()) {
return nullptr;
}
// We've written less audio than our frame offset, return a silence data so we
// have enough audio to be at the correct offset for our current frames.
CheckedInt64 missingFrames = frameOffset - audioWrittenOffset;
AlignedAudioBuffer silenceBuffer(missingFrames.value() *
aNextAudio->mChannels);
if (!silenceBuffer) {
NS_WARNING("OOM in DecodedStream::CreateSilenceDataIfGapExists");
return nullptr;
}
auto duration = FramesToTimeUnit(missingFrames.value(), aNextAudio->mRate);
if (!duration.IsValid()) {
NS_WARNING("Int overflow in DecodedStream::CreateSilenceDataIfGapExists");
return nullptr;
}
RefPtr<AudioData> silenceData = new AudioData(
aNextAudio->mOffset, aNextAudio->mTime, std::move(silenceBuffer),
aNextAudio->mChannels, aNextAudio->mRate);
MOZ_DIAGNOSTIC_ASSERT(duration == silenceData->mDuration, "must be equal");
return silenceData.forget();
}
void DecodedStream::CheckIsDataAudible(const AudioData* aData) {
MOZ_ASSERT(aData);
mAudibilityMonitor->Process(aData);
bool isAudible = mAudibilityMonitor->RecentlyAudible();
if (isAudible != mIsAudioDataAudible) {
mIsAudioDataAudible = isAudible;
mAudibleEvent.Notify(mIsAudioDataAudible);
}
}
void DecodedStreamData::WriteVideoToSegment(
layers::Image* aImage, const TimeUnit& aStart, const TimeUnit& aEnd,
const gfx::IntSize& aIntrinsicSize, const TimeStamp& aTimeStamp,
VideoSegment* aOutput, const PrincipalHandle& aPrincipalHandle,
double aPlaybackRate) {
RefPtr<layers::Image> image = aImage;
auto end =
mVideoTrack->MicrosecondsToTrackTimeRoundDown(aEnd.ToMicroseconds());
auto start =
mVideoTrack->MicrosecondsToTrackTimeRoundDown(aStart.ToMicroseconds());
aOutput->AppendFrame(image.forget(), aIntrinsicSize, aPrincipalHandle, false,
aTimeStamp);
// Extend this so we get accurate durations for all frames.
// Because this track is pushed, we need durations so the graph can track
// when playout of the track has finished.
MOZ_ASSERT(aPlaybackRate > 0);
aOutput->ExtendLastFrameBy(
static_cast<TrackTime>((float)(end - start) / aPlaybackRate));
mLastVideoStartTime = Some(aStart);
mLastVideoEndTime = Some(aEnd);
mLastVideoTimeStamp = aTimeStamp;
}
static bool ZeroDurationAtLastChunk(VideoSegment& aInput) {
// Get the last video frame's start time in VideoSegment aInput.
// If the start time is equal to the duration of aInput, means the last video
// frame's duration is zero.
TrackTime lastVideoStratTime;
aInput.GetLastFrame(&lastVideoStratTime);
return lastVideoStratTime == aInput.GetDuration();
}
void DecodedStream::ResetAudio() {
AssertOwnerThread();
if (!mData) {
return;
}
if (!mInfo.HasAudio()) {
return;
}
TRACE("DecodedStream::ResetAudio");
mData->mAudioTrack->ClearFutureData();
if (const RefPtr<AudioData>& v = mAudioQueue.PeekFront()) {
mData->mNextAudioTime = v->mTime;
mData->mHaveSentFinishAudio = false;
}
}
void DecodedStream::ResetVideo(const PrincipalHandle& aPrincipalHandle) {
AssertOwnerThread();
if (!mData) {
return;
}
if (!mInfo.HasVideo()) {
return;
}
TRACE("DecodedStream::ResetVideo");
TrackTime cleared = mData->mVideoTrack->ClearFutureData();
mData->mVideoTrackWritten -= cleared;
if (mData->mHaveSentFinishVideo && cleared > 0) {
mData->mHaveSentFinishVideo = false;
mData->mListener->EndVideoTrackAt(mData->mVideoTrack, TRACK_TIME_MAX);
}
VideoSegment resetter;
TimeStamp currentTime;
TimeUnit currentPosition = GetPosition(&currentTime);
// Giving direct consumers a frame (really *any* frame, so in this case:
// nullptr) at an earlier time than the previous, will signal to that consumer
// to discard any frames ahead in time of the new frame. To be honest, this is
// an ugly hack because the direct listeners of the MediaTrackGraph do not
// have an API that supports clearing the future frames. ImageContainer and
// VideoFrameContainer do though, and we will need to move to a similar API
// for video tracks as part of bug 1493618.
resetter.AppendFrame(nullptr, mData->mLastVideoImageDisplaySize,
aPrincipalHandle, false, currentTime);
mData->mVideoTrack->AppendData(&resetter);
// Consumer buffers have been reset. We now set the next time to the start
// time of the current frame, so that it can be displayed again on resuming.
if (RefPtr<VideoData> v = mVideoQueue.PeekFront()) {
mData->mLastVideoStartTime = Some(v->mTime - TimeUnit::FromMicroseconds(1));
mData->mLastVideoEndTime = Some(v->mTime);
} else {
// There was no current frame in the queue. We set the next time to the
// current time, so we at least don't resume starting in the future.
mData->mLastVideoStartTime =
Some(currentPosition - TimeUnit::FromMicroseconds(1));
mData->mLastVideoEndTime = Some(currentPosition);
}
mData->mLastVideoTimeStamp = currentTime;
}
void DecodedStream::SendVideo(const PrincipalHandle& aPrincipalHandle) {
AssertOwnerThread();
if (!mInfo.HasVideo()) {
return;
}
if (mData->mHaveSentFinishVideo) {
return;
}
TRACE("DecodedStream::SendVideo");
VideoSegment output;
AutoTArray<RefPtr<VideoData>, 10> video;
// It's OK to hold references to the VideoData because VideoData
// is ref-counted.
mVideoQueue.GetElementsAfter(
mData->mLastVideoStartTime.valueOr(mStartTime.ref()), &video);
TimeStamp currentTime;
TimeUnit currentPosition = GetPosition(&currentTime);
if (mData->mLastVideoTimeStamp.IsNull()) {
mData->mLastVideoTimeStamp = currentTime;
}
for (uint32_t i = 0; i < video.Length(); ++i) {
VideoData* v = video[i];
TimeUnit lastStart = mData->mLastVideoStartTime.valueOr(
mStartTime.ref() - TimeUnit::FromMicroseconds(1));
TimeUnit lastEnd = mData->mLastVideoEndTime.valueOr(mStartTime.ref());
if (lastEnd < v->mTime) {
// Write last video frame to catch up. mLastVideoImage can be null here
// which is fine, it just means there's no video.
// TODO: |mLastVideoImage| should come from the last image rendered
// by the state machine. This will avoid the black frame when capture
// happens in the middle of playback (especially in th middle of a
// video frame). E.g. if we have a video frame that is 30 sec long
// and capture happens at 15 sec, we'll have to append a black frame
// that is 15 sec long.
TimeStamp t =
std::max(mData->mLastVideoTimeStamp,
currentTime + (lastEnd - currentPosition).ToTimeDuration());
mData->WriteVideoToSegment(mData->mLastVideoImage, lastEnd, v->mTime,
mData->mLastVideoImageDisplaySize, t, &output,
aPrincipalHandle, mPlaybackRate);
lastEnd = v->mTime;
}
if (lastStart < v->mTime) {
// This frame starts after the last frame's start. Note that this could be
// before the last frame's end time for some videos. This only matters for
// the track's lifetime in the MTG, as rendering is based on timestamps,
// aka frame start times.
TimeStamp t =
std::max(mData->mLastVideoTimeStamp,
currentTime + (lastEnd - currentPosition).ToTimeDuration());
TimeUnit end = std::max(
v->GetEndTime(),
lastEnd + TimeUnit::FromMicroseconds(
mData->mVideoTrack->TrackTimeToMicroseconds(1) + 1));
mData->mLastVideoImage = v->mImage;
mData->mLastVideoImageDisplaySize = v->mDisplay;
mData->WriteVideoToSegment(v->mImage, lastEnd, end, v->mDisplay, t,
&output, aPrincipalHandle, mPlaybackRate);
}
}
// Check the output is not empty.
bool compensateEOS = false;
bool forceBlack = false;
if (output.GetLastFrame()) {
compensateEOS = ZeroDurationAtLastChunk(output);
}
if (output.GetDuration() > 0) {
mData->mVideoTrackWritten += mData->mVideoTrack->AppendData(&output);
}
if (mVideoQueue.IsFinished() && !mData->mHaveSentFinishVideo) {
if (!mData->mLastVideoImage) {
// We have video, but the video queue finished before we received any
// frame. We insert a black frame to progress any consuming
// HTMLMediaElement. This mirrors the behavior of VideoSink.
// Force a frame - can be null
compensateEOS = true;
// Force frame to be black
forceBlack = true;
// Override the frame's size (will be 0x0 otherwise)
mData->mLastVideoImageDisplaySize = mInfo.mVideo.mDisplay;
}
if (compensateEOS) {
VideoSegment endSegment;
// Calculate the deviation clock time from DecodedStream.
// We round the nr of microseconds up, because WriteVideoToSegment
// will round the conversion from microseconds to TrackTime down.
auto deviation = TimeUnit::FromMicroseconds(
mData->mVideoTrack->TrackTimeToMicroseconds(1) + 1);
auto start = mData->mLastVideoEndTime.valueOr(mStartTime.ref());
mData->WriteVideoToSegment(
mData->mLastVideoImage, start, start + deviation,
mData->mLastVideoImageDisplaySize,
currentTime + (start + deviation - currentPosition).ToTimeDuration(),
&endSegment, aPrincipalHandle, mPlaybackRate);
MOZ_ASSERT(endSegment.GetDuration() > 0);
if (forceBlack) {
endSegment.ReplaceWithDisabled();
}
mData->mVideoTrackWritten += mData->mVideoTrack->AppendData(&endSegment);
}
mData->mListener->EndVideoTrackAt(mData->mVideoTrack,
mData->mVideoTrackWritten);
mData->mHaveSentFinishVideo = true;
}
}
void DecodedStream::SendData() {
AssertOwnerThread();
// Not yet created on the main thread. MDSM will try again later.
if (!mData) {
return;
}
if (!mPlaying) {
return;
}
LOG_DS(LogLevel::Verbose, "SendData()");
SendAudio(mPrincipalHandle);
SendVideo(mPrincipalHandle);
}
TimeUnit DecodedStream::GetEndTime(TrackType aType) const {
AssertOwnerThread();
TRACE("DecodedStream::GetEndTime");
if (aType == TrackInfo::kAudioTrack && mInfo.HasAudio() && mData) {
auto t = mStartTime.ref() +
FramesToTimeUnit(mData->mAudioFramesWritten, mInfo.mAudio.mRate);
if (t.IsValid()) {
return t;
}
} else if (aType == TrackInfo::kVideoTrack && mData) {
return mData->mLastVideoEndTime.valueOr(mStartTime.ref());
}
return TimeUnit::Zero();
}
TimeUnit DecodedStream::GetPosition(TimeStamp* aTimeStamp) {
AssertOwnerThread();
TRACE("DecodedStream::GetPosition");
// This is only called after MDSM starts playback. So mStartTime is
// guaranteed to be something.
MOZ_ASSERT(mStartTime.isSome());
if (aTimeStamp) {
*aTimeStamp = TimeStamp::Now();
}
return mStartTime.ref() + mLastOutputTime;
}
void DecodedStream::NotifyOutput(int64_t aTime) {
AssertOwnerThread();
TimeUnit time = TimeUnit::FromMicroseconds(aTime);
if (time == mLastOutputTime) {
return;
}
MOZ_ASSERT(mLastOutputTime < time);
mLastOutputTime = time;
auto currentTime = GetPosition();
if (profiler_thread_is_being_profiled_for_markers()) {
nsPrintfCString markerString("OutputTime=%" PRId64,
currentTime.ToMicroseconds());
PLAYBACK_PROFILER_MARKER(markerString);
}
LOG_DS(LogLevel::Verbose, "time is now %" PRId64,
currentTime.ToMicroseconds());
// Remove audio samples that have been played by MTG from the queue.
RefPtr<AudioData> a = mAudioQueue.PeekFront();
for (; a && a->GetEndTime() <= currentTime;) {
LOG_DS(LogLevel::Debug, "Dropping audio [%" PRId64 ",%" PRId64 "]",
a->mTime.ToMicroseconds(), a->GetEndTime().ToMicroseconds());
RefPtr<AudioData> releaseMe = mAudioQueue.PopFront();
a = mAudioQueue.PeekFront();
}
}
void DecodedStream::PlayingChanged() {
AssertOwnerThread();
TRACE("DecodedStream::PlayingChanged");
if (!mPlaying) {
// On seek or pause we discard future frames.
ResetVideo(mPrincipalHandle);
ResetAudio();
}
}
void DecodedStream::ConnectListener() {
AssertOwnerThread();
mAudioPushListener = mAudioQueue.PushEvent().Connect(
mOwnerThread, this, &DecodedStream::SendData);
mAudioFinishListener = mAudioQueue.FinishEvent().Connect(
mOwnerThread, this, &DecodedStream::SendData);
mVideoPushListener = mVideoQueue.PushEvent().Connect(
mOwnerThread, this, &DecodedStream::SendData);
mVideoFinishListener = mVideoQueue.FinishEvent().Connect(
mOwnerThread, this, &DecodedStream::SendData);
mWatchManager.Watch(mPlaying, &DecodedStream::SendData);
}
void DecodedStream::DisconnectListener() {
AssertOwnerThread();
mAudioPushListener.Disconnect();
mVideoPushListener.Disconnect();
mAudioFinishListener.Disconnect();
mVideoFinishListener.Disconnect();
mWatchManager.Unwatch(mPlaying, &DecodedStream::SendData);
}
void DecodedStream::GetDebugInfo(dom::MediaSinkDebugInfo& aInfo) {
AssertOwnerThread();
int64_t startTime = mStartTime.isSome() ? mStartTime->ToMicroseconds() : -1;
aInfo.mDecodedStream.mInstance =
NS_ConvertUTF8toUTF16(nsPrintfCString("%p", this));
aInfo.mDecodedStream.mStartTime = startTime;
aInfo.mDecodedStream.mLastOutputTime = mLastOutputTime.ToMicroseconds();
aInfo.mDecodedStream.mPlaying = mPlaying.Ref();
auto lastAudio = mAudioQueue.PeekBack();
aInfo.mDecodedStream.mLastAudio =
lastAudio ? lastAudio->GetEndTime().ToMicroseconds() : -1;
aInfo.mDecodedStream.mAudioQueueFinished = mAudioQueue.IsFinished();
aInfo.mDecodedStream.mAudioQueueSize = mAudioQueue.GetSize();
if (mData) {
mData->GetDebugInfo(aInfo.mDecodedStream.mData);
}
}
#undef LOG_DS
} // namespace mozilla
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