The Tor Browser: content/media/MediaDecoder.cpp@97036ab72558 (annotated)

content/media/MediaDecoder.cpp@97036ab72558 (annotated)

content/media/MediaDecoder.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- 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 "MediaDecoder.h"
 #include "mozilla/FloatingPoint.h"
 #include "mozilla/MathAlgorithms.h"
 #include <limits>
 #include "nsIObserver.h"
 #include "nsTArray.h"
 #include "VideoUtils.h"
 #include "MediaDecoderStateMachine.h"
 #include "mozilla/dom/TimeRanges.h"
 #include "ImageContainer.h"
 #include "MediaResource.h"
 #include "nsError.h"
 #include "mozilla/Preferences.h"
 #include "mozilla/StaticPtr.h"
 #include "nsIMemoryReporter.h"
 #include "nsComponentManagerUtils.h"
 #include "nsITimer.h"
 #include <algorithm>
 #include "MediaShutdownManager.h"
 #include "AudioChannelService.h"
 #ifdef MOZ_WMF
 #include "WMFDecoder.h"
 #endif
 using namespace mozilla::layers;
 using namespace mozilla::dom;
 namespace mozilla {
 // Number of milliseconds between progress events as defined by spec
 static const uint32_t PROGRESS_MS = 350;
 // Number of milliseconds of no data before a stall event is fired as defined by spec
 static const uint32_t STALL_MS = 3000;
 // Number of estimated seconds worth of data we need to have buffered
 // ahead of the current playback position before we allow the media decoder
 // to report that it can play through the entire media without the decode
 // catching up with the download. Having this margin make the
 // MediaDecoder::CanPlayThrough() calculation more stable in the case of
 // fluctuating bitrates.
 static const int64_t CAN_PLAY_THROUGH_MARGIN = 1;
 // avoid redefined macro in unified build
 #undef DECODER_LOG
 #ifdef PR_LOGGING
 PRLogModuleInfo* gMediaDecoderLog;
 #define DECODER_LOG(type, msg, ...) \
   PR_LOG(gMediaDecoderLog, type, ("Decoder=%p " msg, this, ##__VA_ARGS__))
 #else
 #define DECODER_LOG(type, msg, ...)
 #endif
 class MediaMemoryTracker : public nsIMemoryReporter
 {
   NS_DECL_THREADSAFE_ISUPPORTS
   NS_DECL_NSIMEMORYREPORTER
   MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf);
   MediaMemoryTracker();
   virtual ~MediaMemoryTracker();
   void InitMemoryReporter();
   static StaticRefPtr<MediaMemoryTracker> sUniqueInstance;
   static MediaMemoryTracker* UniqueInstance() {
     if (!sUniqueInstance) {
       sUniqueInstance = new MediaMemoryTracker();
       sUniqueInstance->InitMemoryReporter();
     }
     return sUniqueInstance;
   }
   typedef nsTArray<MediaDecoder*> DecodersArray;
   static DecodersArray& Decoders() {
     return UniqueInstance()->mDecoders;
   }
   DecodersArray mDecoders;
 public:
   static void AddMediaDecoder(MediaDecoder* aDecoder)
   {
     Decoders().AppendElement(aDecoder);
   }
   static void RemoveMediaDecoder(MediaDecoder* aDecoder)
   {
     DecodersArray& decoders = Decoders();
     decoders.RemoveElement(aDecoder);
     if (decoders.IsEmpty()) {
       sUniqueInstance = nullptr;
     }
   }
 };
 StaticRefPtr<MediaMemoryTracker> MediaMemoryTracker::sUniqueInstance;
 NS_IMPL_ISUPPORTS(MediaMemoryTracker, nsIMemoryReporter)
 NS_IMPL_ISUPPORTS(MediaDecoder, nsIObserver)
 void MediaDecoder::SetDormantIfNecessary(bool aDormant)
 {
   MOZ_ASSERT(NS_IsMainThread());
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   if (!mDecoderStateMachine || !mDecoderStateMachine->IsDormantNeeded() || (mPlayState == PLAY_STATE_SHUTDOWN)) {
     return;
   }
   if (mIsDormant == aDormant) {
     // no change to dormant state
     return;
   }
   if(aDormant) {
     // enter dormant state
     StopProgress();
     DestroyDecodedStream();
     mDecoderStateMachine->SetDormant(true);
     mRequestedSeekTarget = SeekTarget(mCurrentTime, SeekTarget::Accurate);
     if (mPlayState == PLAY_STATE_PLAYING){
       mNextState = PLAY_STATE_PLAYING;
     } else {
       mNextState = PLAY_STATE_PAUSED;
     }
     mNextState = mPlayState;
     mIsDormant = true;
     mIsExitingDormant = false;
     ChangeState(PLAY_STATE_LOADING);
   } else if ((aDormant != true) && (mPlayState == PLAY_STATE_LOADING)) {
     // exit dormant state
     // trigger to state machine.
     mDecoderStateMachine->SetDormant(false);
     mIsExitingDormant = true;
   }
 }
 void MediaDecoder::Pause()
 {
   MOZ_ASSERT(NS_IsMainThread());
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   if ((mPlayState == PLAY_STATE_LOADING && mIsDormant)  || mPlayState == PLAY_STATE_SEEKING || mPlayState == PLAY_STATE_ENDED) {
     mNextState = PLAY_STATE_PAUSED;
     return;
   }
   ChangeState(PLAY_STATE_PAUSED);
 }
 void MediaDecoder::SetVolume(double aVolume)
 {
   MOZ_ASSERT(NS_IsMainThread());
   mInitialVolume = aVolume;
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetVolume(aVolume);
   }
 }
 void MediaDecoder::SetAudioCaptured(bool aCaptured)
 {
   MOZ_ASSERT(NS_IsMainThread());
   mInitialAudioCaptured = aCaptured;
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetAudioCaptured(aCaptured);
   }
 }
 void MediaDecoder::ConnectDecodedStreamToOutputStream(OutputStreamData* aStream)
 {
   NS_ASSERTION(!aStream->mPort, "Already connected?");
   // The output stream must stay in sync with the decoded stream, so if
   // either stream is blocked, we block the other.
   aStream->mPort = aStream->mStream->AllocateInputPort(mDecodedStream->mStream,
       MediaInputPort::FLAG_BLOCK_INPUT | MediaInputPort::FLAG_BLOCK_OUTPUT);
   // Unblock the output stream now. While it's connected to mDecodedStream,
   // mDecodedStream is responsible for controlling blocking.
   aStream->mStream->ChangeExplicitBlockerCount(-1);
 }
 MediaDecoder::DecodedStreamData::DecodedStreamData(MediaDecoder* aDecoder,
                                                    int64_t aInitialTime,
                                                    SourceMediaStream* aStream)
   : mLastAudioPacketTime(-1),
     mLastAudioPacketEndTime(-1),
     mAudioFramesWritten(0),
     mInitialTime(aInitialTime),
     mNextVideoTime(aInitialTime),
     mDecoder(aDecoder),
     mStreamInitialized(false),
     mHaveSentFinish(false),
     mHaveSentFinishAudio(false),
     mHaveSentFinishVideo(false),
     mStream(aStream),
     mHaveBlockedForPlayState(false),
     mHaveBlockedForStateMachineNotPlaying(false)
 {
   mListener = new DecodedStreamGraphListener(mStream, this);
   mStream->AddListener(mListener);
 }
 MediaDecoder::DecodedStreamData::~DecodedStreamData()
 {
   mListener->Forget();
   mStream->Destroy();
 }
 MediaDecoder::DecodedStreamGraphListener::DecodedStreamGraphListener(MediaStream* aStream,
                                                                      DecodedStreamData* aData)
   : mData(aData),
     mMutex("MediaDecoder::DecodedStreamData::mMutex"),
     mStream(aStream),
     mLastOutputTime(aStream->GetCurrentTime()),
     mStreamFinishedOnMainThread(false)
 {
 }
 void
 MediaDecoder::DecodedStreamGraphListener::NotifyOutput(MediaStreamGraph* aGraph,
                                                        GraphTime aCurrentTime)
 {
   MutexAutoLock lock(mMutex);
   if (mStream) {
     mLastOutputTime = mStream->GraphTimeToStreamTime(aCurrentTime);
   }
 }
 void
 MediaDecoder::DecodedStreamGraphListener::DoNotifyFinished()
 {
   if (mData && mData->mDecoder) {
     if (mData->mDecoder->GetState() == PLAY_STATE_PLAYING) {
       nsCOMPtr<nsIRunnable> event =
         NS_NewRunnableMethod(mData->mDecoder, &MediaDecoder::PlaybackEnded);
       NS_DispatchToCurrentThread(event);
     }
   }
   MutexAutoLock lock(mMutex);
   mStreamFinishedOnMainThread = true;
 }
 void
 MediaDecoder::DecodedStreamGraphListener::NotifyFinished(MediaStreamGraph* aGraph)
 {
   nsCOMPtr<nsIRunnable> event =
     NS_NewRunnableMethod(this, &DecodedStreamGraphListener::DoNotifyFinished);
   aGraph->DispatchToMainThreadAfterStreamStateUpdate(event.forget());
 }
 void MediaDecoder::DestroyDecodedStream()
 {
   MOZ_ASSERT(NS_IsMainThread());
   GetReentrantMonitor().AssertCurrentThreadIn();
   // All streams are having their SourceMediaStream disconnected, so they
   // need to be explicitly blocked again.
   for (int32_t i = mOutputStreams.Length() - 1; i >= 0; --i) {
     OutputStreamData& os = mOutputStreams[i];
     // During cycle collection, nsDOMMediaStream can be destroyed and send
     // its Destroy message before this decoder is destroyed. So we have to
     // be careful not to send any messages after the Destroy().
     if (os.mStream->IsDestroyed()) {
       // Probably the DOM MediaStream was GCed. Clean up.
       os.mPort->Destroy();
       mOutputStreams.RemoveElementAt(i);
       continue;
     }
     os.mStream->ChangeExplicitBlockerCount(1);
     // Explicitly remove all existing ports. This is not strictly necessary but it's
     // good form.
     os.mPort->Destroy();
     os.mPort = nullptr;
   }
   mDecodedStream = nullptr;
 }
 void MediaDecoder::UpdateStreamBlockingForStateMachinePlaying()
 {
   GetReentrantMonitor().AssertCurrentThreadIn();
   if (!mDecodedStream) {
     return;
   }
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetSyncPointForMediaStream();
   }
   bool blockForStateMachineNotPlaying =
     mDecoderStateMachine && !mDecoderStateMachine->IsPlaying() &&
     mDecoderStateMachine->GetState() != MediaDecoderStateMachine::DECODER_STATE_COMPLETED;
   if (blockForStateMachineNotPlaying != mDecodedStream->mHaveBlockedForStateMachineNotPlaying) {
     mDecodedStream->mHaveBlockedForStateMachineNotPlaying = blockForStateMachineNotPlaying;
     int32_t delta = blockForStateMachineNotPlaying ? 1 : -1;
     if (NS_IsMainThread()) {
       mDecodedStream->mStream->ChangeExplicitBlockerCount(delta);
     } else {
       nsCOMPtr<nsIRunnable> runnable =
           NS_NewRunnableMethodWithArg<int32_t>(mDecodedStream->mStream.get(),
               &MediaStream::ChangeExplicitBlockerCount, delta);
       NS_DispatchToMainThread(runnable);
     }
   }
 }
 void MediaDecoder::RecreateDecodedStream(int64_t aStartTimeUSecs)
 {
   MOZ_ASSERT(NS_IsMainThread());
   GetReentrantMonitor().AssertCurrentThreadIn();
   DECODER_LOG(PR_LOG_DEBUG, "RecreateDecodedStream aStartTimeUSecs=%lld!", aStartTimeUSecs);
   DestroyDecodedStream();
   mDecodedStream = new DecodedStreamData(this, aStartTimeUSecs,
     MediaStreamGraph::GetInstance()->CreateSourceStream(nullptr));
   // Note that the delay between removing ports in DestroyDecodedStream
   // and adding new ones won't cause a glitch since all graph operations
   // between main-thread stable states take effect atomically.
   for (int32_t i = mOutputStreams.Length() - 1; i >= 0; --i) {
     OutputStreamData& os = mOutputStreams[i];
     if (os.mStream->IsDestroyed()) {
       // Probably the DOM MediaStream was GCed. Clean up.
       // No need to destroy the port; all ports have been destroyed here.
       mOutputStreams.RemoveElementAt(i);
       continue;
     }
     ConnectDecodedStreamToOutputStream(&os);
   }
   UpdateStreamBlockingForStateMachinePlaying();
   mDecodedStream->mHaveBlockedForPlayState = mPlayState != PLAY_STATE_PLAYING;
   if (mDecodedStream->mHaveBlockedForPlayState) {
     mDecodedStream->mStream->ChangeExplicitBlockerCount(1);
   }
 }
 void MediaDecoder::AddOutputStream(ProcessedMediaStream* aStream,
                                    bool aFinishWhenEnded)
 {
   MOZ_ASSERT(NS_IsMainThread());
   DECODER_LOG(PR_LOG_DEBUG, "AddOutputStream aStream=%p!", aStream);
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     if (!mDecodedStream) {
       RecreateDecodedStream(mDecoderStateMachine ?
           int64_t(mDecoderStateMachine->GetCurrentTime()*USECS_PER_S) : 0);
     }
     OutputStreamData* os = mOutputStreams.AppendElement();
     os->Init(aStream, aFinishWhenEnded);
     ConnectDecodedStreamToOutputStream(os);
     if (aFinishWhenEnded) {
       // Ensure that aStream finishes the moment mDecodedStream does.
       aStream->SetAutofinish(true);
     }
   }
   // This can be called before Load(), in which case our mDecoderStateMachine
   // won't have been created yet and we can rely on Load() to schedule it
   // once it is created.
   if (mDecoderStateMachine) {
     // Make sure the state machine thread runs so that any buffered data
     // is fed into our stream.
     ScheduleStateMachineThread();
   }
 }
 double MediaDecoder::GetDuration()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mInfiniteStream) {
     return std::numeric_limits<double>::infinity();
   }
   if (mDuration >= 0) {
      return static_cast<double>(mDuration) / static_cast<double>(USECS_PER_S);
   }
   return std::numeric_limits<double>::quiet_NaN();
 }
 int64_t MediaDecoder::GetMediaDuration()
 {
   NS_ENSURE_TRUE(GetStateMachine(), -1);
   return GetStateMachine()->GetDuration();
 }
 void MediaDecoder::SetInfinite(bool aInfinite)
 {
   MOZ_ASSERT(NS_IsMainThread());
   mInfiniteStream = aInfinite;
 }
 bool MediaDecoder::IsInfinite()
 {
   MOZ_ASSERT(NS_IsMainThread());
   return mInfiniteStream;
 }
 MediaDecoder::MediaDecoder() :
   mDecoderPosition(0),
   mPlaybackPosition(0),
   mCurrentTime(0.0),
   mInitialVolume(0.0),
   mInitialPlaybackRate(1.0),
   mInitialPreservesPitch(true),
   mDuration(-1),
   mTransportSeekable(true),
   mMediaSeekable(true),
   mSameOriginMedia(false),
   mReentrantMonitor("media.decoder"),
   mIsDormant(false),
   mIsExitingDormant(false),
   mPlayState(PLAY_STATE_PAUSED),
   mNextState(PLAY_STATE_PAUSED),
   mCalledResourceLoaded(false),
   mIgnoreProgressData(false),
   mInfiniteStream(false),
   mOwner(nullptr),
   mPinnedForSeek(false),
   mShuttingDown(false),
   mPausedForPlaybackRateNull(false),
   mMinimizePreroll(false)
 {
   MOZ_COUNT_CTOR(MediaDecoder);
   MOZ_ASSERT(NS_IsMainThread());
   MediaMemoryTracker::AddMediaDecoder(this);
 #ifdef PR_LOGGING
   if (!gMediaDecoderLog) {
     gMediaDecoderLog = PR_NewLogModule("MediaDecoder");
   }
 #endif
   mAudioChannel = AudioChannelService::GetDefaultAudioChannel();
 }
 bool MediaDecoder::Init(MediaDecoderOwner* aOwner)
 {
   MOZ_ASSERT(NS_IsMainThread());
   mOwner = aOwner;
   mVideoFrameContainer = aOwner->GetVideoFrameContainer();
   MediaShutdownManager::Instance().Register(this);
   return true;
 }
 void MediaDecoder::Shutdown()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   mShuttingDown = true;
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     DestroyDecodedStream();
   }
   // This changes the decoder state to SHUTDOWN and does other things
   // necessary to unblock the state machine thread if it's blocked, so
   // the asynchronous shutdown in nsDestroyStateMachine won't deadlock.
   if (mDecoderStateMachine) {
     mDecoderStateMachine->Shutdown();
   }
   // Force any outstanding seek and byterange requests to complete
   // to prevent shutdown from deadlocking.
   if (mResource) {
     mResource->Close();
   }
   ChangeState(PLAY_STATE_SHUTDOWN);
   StopProgress();
   mOwner = nullptr;
   MediaShutdownManager::Instance().Unregister(this);
 }
 MediaDecoder::~MediaDecoder()
 {
   MOZ_ASSERT(NS_IsMainThread());
   MediaMemoryTracker::RemoveMediaDecoder(this);
   UnpinForSeek();
   MOZ_COUNT_DTOR(MediaDecoder);
 }
 nsresult MediaDecoder::OpenResource(nsIStreamListener** aStreamListener)
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (aStreamListener) {
     *aStreamListener = nullptr;
   }
   {
     // Hold the lock while we do this to set proper lock ordering
     // expectations for dynamic deadlock detectors: decoder lock(s)
     // should be grabbed before the cache lock
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     nsresult rv = mResource->Open(aStreamListener);
     if (NS_FAILED(rv)) {
       DECODER_LOG(PR_LOG_WARNING, "Failed to open stream!");
       return rv;
     }
   }
   return NS_OK;
 }
 nsresult MediaDecoder::Load(nsIStreamListener** aStreamListener,
                             MediaDecoder* aCloneDonor)
 {
   MOZ_ASSERT(NS_IsMainThread());
   nsresult rv = OpenResource(aStreamListener);
   NS_ENSURE_SUCCESS(rv, rv);
   mDecoderStateMachine = CreateStateMachine();
   if (!mDecoderStateMachine) {
     DECODER_LOG(PR_LOG_WARNING, "Failed to create state machine!");
     return NS_ERROR_FAILURE;
   }
   return InitializeStateMachine(aCloneDonor);
 }
 nsresult MediaDecoder::InitializeStateMachine(MediaDecoder* aCloneDonor)
 {
   MOZ_ASSERT(NS_IsMainThread());
   NS_ASSERTION(mDecoderStateMachine, "Cannot initialize null state machine!");
   MediaDecoder* cloneDonor = static_cast<MediaDecoder*>(aCloneDonor);
   if (NS_FAILED(mDecoderStateMachine->Init(cloneDonor ?
                                            cloneDonor->mDecoderStateMachine : nullptr))) {
     DECODER_LOG(PR_LOG_WARNING, "Failed to init state machine!");
     return NS_ERROR_FAILURE;
   }
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     mDecoderStateMachine->SetTransportSeekable(mTransportSeekable);
     mDecoderStateMachine->SetMediaSeekable(mMediaSeekable);
     mDecoderStateMachine->SetDuration(mDuration);
     mDecoderStateMachine->SetVolume(mInitialVolume);
     mDecoderStateMachine->SetAudioCaptured(mInitialAudioCaptured);
     SetPlaybackRate(mInitialPlaybackRate);
     mDecoderStateMachine->SetPreservesPitch(mInitialPreservesPitch);
     if (mMinimizePreroll) {
       mDecoderStateMachine->SetMinimizePrerollUntilPlaybackStarts();
     }
   }
   ChangeState(PLAY_STATE_LOADING);
   return ScheduleStateMachineThread();
 }
 void MediaDecoder::SetMinimizePrerollUntilPlaybackStarts()
 {
   MOZ_ASSERT(NS_IsMainThread());
   mMinimizePreroll = true;
 }
 nsresult MediaDecoder::ScheduleStateMachineThread()
 {
   MOZ_ASSERT(NS_IsMainThread());
   NS_ASSERTION(mDecoderStateMachine,
                "Must have state machine to start state machine thread");
   NS_ENSURE_STATE(mDecoderStateMachine);
   if (mShuttingDown)
     return NS_OK;
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   return mDecoderStateMachine->ScheduleStateMachine();
 }
 nsresult MediaDecoder::Play()
 {
   MOZ_ASSERT(NS_IsMainThread());
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   NS_ASSERTION(mDecoderStateMachine != nullptr, "Should have state machine.");
   nsresult res = ScheduleStateMachineThread();
   NS_ENSURE_SUCCESS(res,res);
   if ((mPlayState == PLAY_STATE_LOADING && mIsDormant) || mPlayState == PLAY_STATE_SEEKING) {
     mNextState = PLAY_STATE_PLAYING;
     return NS_OK;
   }
   if (mPlayState == PLAY_STATE_ENDED)
     return Seek(0, SeekTarget::PrevSyncPoint);
   ChangeState(PLAY_STATE_PLAYING);
   return NS_OK;
 }
 nsresult MediaDecoder::Seek(double aTime, SeekTarget::Type aSeekType)
 {
   MOZ_ASSERT(NS_IsMainThread());
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   NS_ABORT_IF_FALSE(aTime >= 0.0, "Cannot seek to a negative value.");
   int64_t timeUsecs = 0;
   nsresult rv = SecondsToUsecs(aTime, timeUsecs);
   NS_ENSURE_SUCCESS(rv, rv);
   mRequestedSeekTarget = SeekTarget(timeUsecs, aSeekType);
   mCurrentTime = aTime;
   // If we are already in the seeking state, then setting mRequestedSeekTarget
   // above will result in the new seek occurring when the current seek
   // completes.
   if ((mPlayState != PLAY_STATE_LOADING || !mIsDormant) && mPlayState != PLAY_STATE_SEEKING) {
     bool paused = false;
     if (mOwner) {
       paused = mOwner->GetPaused();
     }
     mNextState = paused ? PLAY_STATE_PAUSED : PLAY_STATE_PLAYING;
     PinForSeek();
     ChangeState(PLAY_STATE_SEEKING);
   }
   return ScheduleStateMachineThread();
 }
 bool MediaDecoder::IsLogicallyPlaying()
 {
   GetReentrantMonitor().AssertCurrentThreadIn();
   return mPlayState == PLAY_STATE_PLAYING ||
          mNextState == PLAY_STATE_PLAYING;
 }
 double MediaDecoder::GetCurrentTime()
 {
   MOZ_ASSERT(NS_IsMainThread());
   return mCurrentTime;
 }
 already_AddRefed<nsIPrincipal> MediaDecoder::GetCurrentPrincipal()
 {
   MOZ_ASSERT(NS_IsMainThread());
   return mResource ? mResource->GetCurrentPrincipal() : nullptr;
 }
 void MediaDecoder::QueueMetadata(int64_t aPublishTime,
                                  int aChannels,
                                  int aRate,
                                  bool aHasAudio,
                                  bool aHasVideo,
                                  MetadataTags* aTags)
 {
   NS_ASSERTION(OnDecodeThread(), "Should be on decode thread.");
   GetReentrantMonitor().AssertCurrentThreadIn();
   mDecoderStateMachine->QueueMetadata(aPublishTime, aChannels, aRate, aHasAudio, aHasVideo, aTags);
 }
 bool
 MediaDecoder::IsDataCachedToEndOfResource()
 {
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   return (mResource &&
           mResource->IsDataCachedToEndOfResource(mDecoderPosition));
 }
 void MediaDecoder::MetadataLoaded(int aChannels, int aRate, bool aHasAudio, bool aHasVideo, MetadataTags* aTags)
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown) {
     return;
   }
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     if (mPlayState == PLAY_STATE_LOADING && mIsDormant && !mIsExitingDormant) {
       return;
     } else if (mPlayState == PLAY_STATE_LOADING && mIsDormant && mIsExitingDormant) {
       mIsDormant = false;
       mIsExitingDormant = false;
     }
     mDuration = mDecoderStateMachine ? mDecoderStateMachine->GetDuration() : -1;
     // Duration has changed so we should recompute playback rate
     UpdatePlaybackRate();
   }
   if (mDuration == -1) {
     SetInfinite(true);
   }
   if (mOwner) {
     // Make sure the element and the frame (if any) are told about
     // our new size.
     Invalidate();
     mOwner->MetadataLoaded(aChannels, aRate, aHasAudio, aHasVideo, aTags);
   }
   if (!mCalledResourceLoaded) {
     StartProgress();
   } else if (mOwner) {
     // Resource was loaded during metadata loading, when progress
     // events are being ignored. Fire the final progress event.
     mOwner->DispatchAsyncEvent(NS_LITERAL_STRING("progress"));
   }
   // Only inform the element of FirstFrameLoaded if not doing a load() in order
   // to fulfill a seek, otherwise we'll get multiple loadedfirstframe events.
   bool notifyResourceIsLoaded = !mCalledResourceLoaded &&
                                 IsDataCachedToEndOfResource();
   if (mOwner) {
     mOwner->FirstFrameLoaded(notifyResourceIsLoaded);
   }
   // This can run cache callbacks.
   mResource->EnsureCacheUpToDate();
   // The element can run javascript via events
   // before reaching here, so only change the
   // state if we're still set to the original
   // loading state.
   if (mPlayState == PLAY_STATE_LOADING) {
     if (mRequestedSeekTarget.IsValid()) {
       ChangeState(PLAY_STATE_SEEKING);
     }
     else {
       ChangeState(mNextState);
     }
   }
   if (notifyResourceIsLoaded) {
     ResourceLoaded();
   }
   // Run NotifySuspendedStatusChanged now to give us a chance to notice
   // that autoplay should run.
   NotifySuspendedStatusChanged();
 }
 void MediaDecoder::ResourceLoaded()
 {
   MOZ_ASSERT(NS_IsMainThread());
   // Don't handle ResourceLoaded if we are shutting down, or if
   // we need to ignore progress data due to seeking (in the case
   // that the seek results in reaching end of file, we get a bogus call
   // to ResourceLoaded).
   if (mShuttingDown)
     return;
   {
     // If we are seeking or loading then the resource loaded notification we get
     // should be ignored, since it represents the end of the seek request.
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     if (mIgnoreProgressData || mCalledResourceLoaded || mPlayState == PLAY_STATE_LOADING)
       return;
     Progress(false);
     mCalledResourceLoaded = true;
     StopProgress();
   }
   // Ensure the final progress event gets fired
   if (mOwner) {
     mOwner->ResourceLoaded();
   }
 }
 void MediaDecoder::ResetConnectionState()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   if (mOwner) {
     // Notify the media element that connection gets lost.
     mOwner->ResetConnectionState();
   }
   // Since we have notified the media element the connection
   // lost event, the decoder will be reloaded when user tries
   // to play the Rtsp streaming next time.
   Shutdown();
 }
 void MediaDecoder::NetworkError()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   if (mOwner)
     mOwner->NetworkError();
   Shutdown();
 }
 void MediaDecoder::DecodeError()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   if (mOwner)
     mOwner->DecodeError();
   Shutdown();
 }
 void MediaDecoder::UpdateSameOriginStatus(bool aSameOrigin)
 {
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   mSameOriginMedia = aSameOrigin;
 }
 bool MediaDecoder::IsSameOriginMedia()
 {
   GetReentrantMonitor().AssertCurrentThreadIn();
   return mSameOriginMedia;
 }
 bool MediaDecoder::IsSeeking() const
 {
   MOZ_ASSERT(NS_IsMainThread());
   return mPlayState == PLAY_STATE_SEEKING;
 }
 bool MediaDecoder::IsEnded() const
 {
   MOZ_ASSERT(NS_IsMainThread());
   return mPlayState == PLAY_STATE_ENDED || mPlayState == PLAY_STATE_SHUTDOWN;
 }
 void MediaDecoder::PlaybackEnded()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown || mPlayState == MediaDecoder::PLAY_STATE_SEEKING)
     return;
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     for (int32_t i = mOutputStreams.Length() - 1; i >= 0; --i) {
       OutputStreamData& os = mOutputStreams[i];
       if (os.mStream->IsDestroyed()) {
         // Probably the DOM MediaStream was GCed. Clean up.
         os.mPort->Destroy();
         mOutputStreams.RemoveElementAt(i);
         continue;
       }
       if (os.mFinishWhenEnded) {
         // Shouldn't really be needed since mDecodedStream should already have
         // finished, but doesn't hurt.
         os.mStream->Finish();
         os.mPort->Destroy();
         // Not really needed but it keeps the invariant that a stream not
         // connected to mDecodedStream is explicity blocked.
         os.mStream->ChangeExplicitBlockerCount(1);
         mOutputStreams.RemoveElementAt(i);
       }
     }
   }
   PlaybackPositionChanged();
   ChangeState(PLAY_STATE_ENDED);
   InvalidateWithFlags(VideoFrameContainer::INVALIDATE_FORCE);
   UpdateReadyStateForData();
   if (mOwner)  {
     mOwner->PlaybackEnded();
   }
   // This must be called after |mOwner->PlaybackEnded()| call above, in order
   // to fire the required durationchange.
   if (IsInfinite()) {
     SetInfinite(false);
   }
 }
 NS_IMETHODIMP MediaDecoder::Observe(nsISupports *aSubjet,
                                         const char *aTopic,
                                         const char16_t *someData)
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0) {
     Shutdown();
   }
   return NS_OK;
 }
 MediaDecoder::Statistics
 MediaDecoder::GetStatistics()
 {
   MOZ_ASSERT(NS_IsMainThread() || OnStateMachineThread());
   Statistics result;
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   if (mResource) {
     result.mDownloadRate =
       mResource->GetDownloadRate(&result.mDownloadRateReliable);
     result.mDownloadPosition =
       mResource->GetCachedDataEnd(mDecoderPosition);
     result.mTotalBytes = mResource->GetLength();
     result.mPlaybackRate = ComputePlaybackRate(&result.mPlaybackRateReliable);
     result.mDecoderPosition = mDecoderPosition;
     result.mPlaybackPosition = mPlaybackPosition;
   }
   else {
     result.mDownloadRate = 0;
     result.mDownloadRateReliable = true;
     result.mPlaybackRate = 0;
     result.mPlaybackRateReliable = true;
     result.mDecoderPosition = 0;
     result.mPlaybackPosition = 0;
     result.mDownloadPosition = 0;
     result.mTotalBytes = 0;
   }
   return result;
 }
 double MediaDecoder::ComputePlaybackRate(bool* aReliable)
 {
   GetReentrantMonitor().AssertCurrentThreadIn();
   MOZ_ASSERT(NS_IsMainThread() || OnStateMachineThread() || OnDecodeThread());
   int64_t length = mResource ? mResource->GetLength() : -1;
   if (mDuration >= 0 && length >= 0) {
     *aReliable = true;
     return length * static_cast<double>(USECS_PER_S) / mDuration;
   }
   return mPlaybackStatistics.GetRateAtLastStop(aReliable);
 }
 void MediaDecoder::UpdatePlaybackRate()
 {
   MOZ_ASSERT(NS_IsMainThread() || OnStateMachineThread());
   GetReentrantMonitor().AssertCurrentThreadIn();
   if (!mResource)
     return;
   bool reliable;
   uint32_t rate = uint32_t(ComputePlaybackRate(&reliable));
   if (reliable) {
     // Avoid passing a zero rate
     rate = std::max(rate, 1u);
   }
   else {
     // Set a minimum rate of 10,000 bytes per second ... sometimes we just
     // don't have good data
     rate = std::max(rate, 10000u);
   }
   mResource->SetPlaybackRate(rate);
 }
 void MediaDecoder::NotifySuspendedStatusChanged()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (!mResource)
     return;
   bool suspended = mResource->IsSuspendedByCache();
   if (mOwner) {
     mOwner->NotifySuspendedByCache(suspended);
     UpdateReadyStateForData();
   }
 }
 void MediaDecoder::NotifyBytesDownloaded()
 {
   MOZ_ASSERT(NS_IsMainThread());
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     UpdatePlaybackRate();
   }
   UpdateReadyStateForData();
   Progress(false);
 }
 void MediaDecoder::NotifyDownloadEnded(nsresult aStatus)
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (aStatus == NS_BINDING_ABORTED) {
     // Download has been cancelled by user.
     if (mOwner) {
       mOwner->LoadAborted();
     }
     return;
   }
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     UpdatePlaybackRate();
   }
   if (NS_SUCCEEDED(aStatus)) {
     ResourceLoaded();
   }
   else if (aStatus != NS_BASE_STREAM_CLOSED) {
     NetworkError();
   }
   UpdateReadyStateForData();
 }
 void MediaDecoder::NotifyPrincipalChanged()
 {
   if (mOwner) {
     mOwner->NotifyDecoderPrincipalChanged();
   }
 }
 void MediaDecoder::NotifyBytesConsumed(int64_t aBytes, int64_t aOffset)
 {
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   NS_ENSURE_TRUE_VOID(mDecoderStateMachine);
   if (mIgnoreProgressData) {
     return;
   }
   if (aOffset >= mDecoderPosition) {
     mPlaybackStatistics.AddBytes(aBytes);
   }
   mDecoderPosition = aOffset + aBytes;
 }
 void MediaDecoder::UpdateReadyStateForData()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (!mOwner || mShuttingDown || !mDecoderStateMachine)
     return;
   MediaDecoderOwner::NextFrameStatus frameStatus =
     mDecoderStateMachine->GetNextFrameStatus();
   mOwner->UpdateReadyStateForData(frameStatus);
 }
 void MediaDecoder::SeekingStopped()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   bool seekWasAborted = false;
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     // An additional seek was requested while the current seek was
     // in operation.
     if (mRequestedSeekTarget.IsValid()) {
       ChangeState(PLAY_STATE_SEEKING);
       seekWasAborted = true;
     } else {
       UnpinForSeek();
       ChangeState(mNextState);
     }
   }
   PlaybackPositionChanged();
   if (mOwner) {
     UpdateReadyStateForData();
     if (!seekWasAborted) {
       mOwner->SeekCompleted();
     }
   }
 }
 // This is called when seeking stopped *and* we're at the end of the
 // media.
 void MediaDecoder::SeekingStoppedAtEnd()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   bool fireEnded = false;
   bool seekWasAborted = false;
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     // An additional seek was requested while the current seek was
     // in operation.
     if (mRequestedSeekTarget.IsValid()) {
       ChangeState(PLAY_STATE_SEEKING);
       seekWasAborted = true;
     } else {
       UnpinForSeek();
       fireEnded = true;
       ChangeState(PLAY_STATE_ENDED);
     }
   }
   PlaybackPositionChanged();
   if (mOwner) {
     UpdateReadyStateForData();
     if (!seekWasAborted) {
       mOwner->SeekCompleted();
       if (fireEnded) {
         mOwner->PlaybackEnded();
       }
     }
   }
 }
 void MediaDecoder::SeekingStarted()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   if (mOwner) {
     UpdateReadyStateForData();
     mOwner->SeekStarted();
   }
 }
 void MediaDecoder::ChangeState(PlayState aState)
 {
   MOZ_ASSERT(NS_IsMainThread());
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   if (mNextState == aState) {
     mNextState = PLAY_STATE_PAUSED;
   }
   if ((mPlayState == PLAY_STATE_LOADING && mIsDormant && aState != PLAY_STATE_SHUTDOWN) ||
        mPlayState == PLAY_STATE_SHUTDOWN) {
     GetReentrantMonitor().NotifyAll();
     return;
   }
   if (mDecodedStream) {
     bool blockForPlayState = aState != PLAY_STATE_PLAYING;
     if (mDecodedStream->mHaveBlockedForPlayState != blockForPlayState) {
       mDecodedStream->mStream->ChangeExplicitBlockerCount(blockForPlayState ? 1 : -1);
       mDecodedStream->mHaveBlockedForPlayState = blockForPlayState;
     }
   }
   mPlayState = aState;
   ApplyStateToStateMachine(mPlayState);
   if (aState!= PLAY_STATE_LOADING) {
     mIsDormant = false;
     mIsExitingDormant = false;
   }
   GetReentrantMonitor().NotifyAll();
 }
 void MediaDecoder::ApplyStateToStateMachine(PlayState aState)
 {
   MOZ_ASSERT(NS_IsMainThread());
   GetReentrantMonitor().AssertCurrentThreadIn();
   if (mDecoderStateMachine) {
     switch (aState) {
       case PLAY_STATE_PLAYING:
         mDecoderStateMachine->Play();
         break;
       case PLAY_STATE_SEEKING:
         mDecoderStateMachine->Seek(mRequestedSeekTarget);
         mRequestedSeekTarget.Reset();
         break;
       default:
         /* No action needed */
         break;
     }
   }
 }
 void MediaDecoder::PlaybackPositionChanged()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mShuttingDown)
     return;
   double lastTime = mCurrentTime;
   // Control the scope of the monitor so it is not
   // held while the timeupdate and the invalidate is run.
   {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     if (mDecoderStateMachine) {
       if (!IsSeeking()) {
         // Only update the current playback position if we're not seeking.
         // If we are seeking, the update could have been scheduled on the
         // state machine thread while we were playing but after the seek
         // algorithm set the current playback position on the main thread,
         // and we don't want to override the seek algorithm and change the
         // current time after the seek has started but before it has
         // completed.
         if (GetDecodedStream()) {
           mCurrentTime = mDecoderStateMachine->GetCurrentTimeViaMediaStreamSync()/
             static_cast<double>(USECS_PER_S);
         } else {
           mCurrentTime = mDecoderStateMachine->GetCurrentTime();
         }
       }
       mDecoderStateMachine->ClearPositionChangeFlag();
     }
   }
   // Invalidate the frame so any video data is displayed.
   // Do this before the timeupdate event so that if that
   // event runs JavaScript that queries the media size, the
   // frame has reflowed and the size updated beforehand.
   Invalidate();
   if (mOwner && lastTime != mCurrentTime) {
     FireTimeUpdate();
   }
 }
 void MediaDecoder::DurationChanged()
 {
   MOZ_ASSERT(NS_IsMainThread());
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   int64_t oldDuration = mDuration;
   mDuration = mDecoderStateMachine ? mDecoderStateMachine->GetDuration() : -1;
   // Duration has changed so we should recompute playback rate
   UpdatePlaybackRate();
   SetInfinite(mDuration == -1);
   if (mOwner && oldDuration != mDuration && !IsInfinite()) {
     DECODER_LOG(PR_LOG_DEBUG, "Duration changed to %lld", mDuration);
     mOwner->DispatchEvent(NS_LITERAL_STRING("durationchange"));
   }
 }
 void MediaDecoder::SetDuration(double aDuration)
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mozilla::IsInfinite(aDuration)) {
     SetInfinite(true);
   } else if (IsNaN(aDuration)) {
     mDuration = -1;
     SetInfinite(true);
   } else {
     mDuration = static_cast<int64_t>(NS_round(aDuration * static_cast<double>(USECS_PER_S)));
   }
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetDuration(mDuration);
   }
   // Duration has changed so we should recompute playback rate
   UpdatePlaybackRate();
 }
 void MediaDecoder::SetMediaDuration(int64_t aDuration)
 {
   NS_ENSURE_TRUE_VOID(GetStateMachine());
   GetStateMachine()->SetDuration(aDuration);
 }
 void MediaDecoder::UpdateEstimatedMediaDuration(int64_t aDuration)
 {
   if (mPlayState <= PLAY_STATE_LOADING) {
     return;
   }
   NS_ENSURE_TRUE_VOID(GetStateMachine());
   GetStateMachine()->UpdateEstimatedDuration(aDuration);
 }
 void MediaDecoder::SetMediaSeekable(bool aMediaSeekable) {
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   MOZ_ASSERT(NS_IsMainThread() || OnDecodeThread());
   mMediaSeekable = aMediaSeekable;
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetMediaSeekable(aMediaSeekable);
   }
 }
 void MediaDecoder::SetTransportSeekable(bool aTransportSeekable)
 {
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   MOZ_ASSERT(NS_IsMainThread() || OnDecodeThread());
   mTransportSeekable = aTransportSeekable;
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetTransportSeekable(aTransportSeekable);
   }
 }
 bool MediaDecoder::IsTransportSeekable()
 {
   MOZ_ASSERT(NS_IsMainThread());
   return mTransportSeekable;
 }
 bool MediaDecoder::IsMediaSeekable()
 {
   NS_ENSURE_TRUE(GetStateMachine(), false);
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   MOZ_ASSERT(OnDecodeThread() || NS_IsMainThread());
   return mMediaSeekable;
 }
 nsresult MediaDecoder::GetSeekable(dom::TimeRanges* aSeekable)
 {
   double initialTime = 0.0;
   // We can seek in buffered range if the media is seekable. Also, we can seek
   // in unbuffered ranges if the transport level is seekable (local file or the
   // server supports range requests, etc.)
   if (!IsMediaSeekable()) {
     return NS_OK;
   } else if (!IsTransportSeekable()) {
     return GetBuffered(aSeekable);
   } else {
     double end = IsInfinite() ? std::numeric_limits<double>::infinity()
                               : initialTime + GetDuration();
     aSeekable->Add(initialTime, end);
     return NS_OK;
   }
 }
 void MediaDecoder::SetFragmentEndTime(double aTime)
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mDecoderStateMachine) {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     mDecoderStateMachine->SetFragmentEndTime(static_cast<int64_t>(aTime * USECS_PER_S));
   }
 }
 void MediaDecoder::SetMediaEndTime(int64_t aTime)
 {
   NS_ENSURE_TRUE_VOID(GetStateMachine());
   GetStateMachine()->SetMediaEndTime(aTime);
 }
 void MediaDecoder::Suspend()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mResource) {
     mResource->Suspend(true);
   }
 }
 void MediaDecoder::Resume(bool aForceBuffering)
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mResource) {
     mResource->Resume();
   }
   if (aForceBuffering) {
     ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
     if (mDecoderStateMachine) {
       mDecoderStateMachine->StartBuffering();
     }
   }
 }
 void MediaDecoder::StopProgressUpdates()
 {
   MOZ_ASSERT(OnStateMachineThread() || OnDecodeThread());
   GetReentrantMonitor().AssertCurrentThreadIn();
   mIgnoreProgressData = true;
   if (mResource) {
     mResource->SetReadMode(MediaCacheStream::MODE_METADATA);
   }
 }
 void MediaDecoder::StartProgressUpdates()
 {
   MOZ_ASSERT(OnStateMachineThread() || OnDecodeThread());
   GetReentrantMonitor().AssertCurrentThreadIn();
   mIgnoreProgressData = false;
   if (mResource) {
     mResource->SetReadMode(MediaCacheStream::MODE_PLAYBACK);
     mDecoderPosition = mPlaybackPosition = mResource->Tell();
   }
 }
 void MediaDecoder::MoveLoadsToBackground()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (mResource) {
     mResource->MoveLoadsToBackground();
   }
 }
 void MediaDecoder::UpdatePlaybackOffset(int64_t aOffset)
 {
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   mPlaybackPosition = std::max(aOffset, mPlaybackPosition);
 }
 bool MediaDecoder::OnStateMachineThread() const
 {
   return mDecoderStateMachine->OnStateMachineThread();
 }
 void MediaDecoder::SetPlaybackRate(double aPlaybackRate)
 {
   if (aPlaybackRate == 0) {
     mPausedForPlaybackRateNull = true;
     Pause();
     return;
   } else if (mPausedForPlaybackRateNull) {
     // If the playbackRate is no longer null, restart the playback, iff the
     // media was playing.
     if (mOwner && !mOwner->GetPaused()) {
       Play();
     }
     mPausedForPlaybackRateNull = false;
   }
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetPlaybackRate(aPlaybackRate);
   } else {
     mInitialPlaybackRate = aPlaybackRate;
   }
 }
 void MediaDecoder::SetPreservesPitch(bool aPreservesPitch)
 {
   if (mDecoderStateMachine) {
     mDecoderStateMachine->SetPreservesPitch(aPreservesPitch);
   } else {
     mInitialPreservesPitch = aPreservesPitch;
   }
 }
 bool MediaDecoder::OnDecodeThread() const {
   NS_WARN_IF_FALSE(mDecoderStateMachine, "mDecoderStateMachine is null");
   return mDecoderStateMachine ? mDecoderStateMachine->OnDecodeThread() : false;
 }
 ReentrantMonitor& MediaDecoder::GetReentrantMonitor() {
   return mReentrantMonitor.GetReentrantMonitor();
 }
 ImageContainer* MediaDecoder::GetImageContainer()
 {
   return mVideoFrameContainer ? mVideoFrameContainer->GetImageContainer() : nullptr;
 }
 void MediaDecoder::InvalidateWithFlags(uint32_t aFlags)
 {
   if (mVideoFrameContainer) {
     mVideoFrameContainer->InvalidateWithFlags(aFlags);
   }
 }
 void MediaDecoder::Invalidate()
 {
   if (mVideoFrameContainer) {
     mVideoFrameContainer->Invalidate();
   }
 }
 // Constructs the time ranges representing what segments of the media
 // are buffered and playable.
 nsresult MediaDecoder::GetBuffered(dom::TimeRanges* aBuffered) {
   if (mDecoderStateMachine) {
     return mDecoderStateMachine->GetBuffered(aBuffered);
   }
   return NS_ERROR_FAILURE;
 }
 size_t MediaDecoder::SizeOfVideoQueue() {
   if (mDecoderStateMachine) {
     return mDecoderStateMachine->SizeOfVideoQueue();
   }
   return 0;
 }
 size_t MediaDecoder::SizeOfAudioQueue() {
   if (mDecoderStateMachine) {
     return mDecoderStateMachine->SizeOfAudioQueue();
   }
   return 0;
 }
 void MediaDecoder::NotifyDataArrived(const char* aBuffer, uint32_t aLength, int64_t aOffset) {
   if (mDecoderStateMachine) {
     mDecoderStateMachine->NotifyDataArrived(aBuffer, aLength, aOffset);
   }
 }
 void MediaDecoder::UpdatePlaybackPosition(int64_t aTime)
 {
   mDecoderStateMachine->UpdatePlaybackPosition(aTime);
 }
 // Provide access to the state machine object
 MediaDecoderStateMachine* MediaDecoder::GetStateMachine() const {
   return mDecoderStateMachine;
 }
 void
 MediaDecoder::NotifyWaitingForResourcesStatusChanged()
 {
   ReentrantMonitorAutoEnter mon(GetReentrantMonitor());
   if (mDecoderStateMachine) {
     mDecoderStateMachine->NotifyWaitingForResourcesStatusChanged();
   }
 }
 bool MediaDecoder::IsShutdown() const {
   NS_ENSURE_TRUE(GetStateMachine(), true);
   return GetStateMachine()->IsShutdown();
 }
 int64_t MediaDecoder::GetEndMediaTime() const {
   NS_ENSURE_TRUE(GetStateMachine(), -1);
   return GetStateMachine()->GetEndMediaTime();
 }
 // Drop reference to state machine.  Only called during shutdown dance.
 void MediaDecoder::ReleaseStateMachine() {
   mDecoderStateMachine = nullptr;
 }
 MediaDecoderOwner* MediaDecoder::GetMediaOwner() const
 {
   return mOwner;
 }
 static void ProgressCallback(nsITimer* aTimer, void* aClosure)
 {
   MediaDecoder* decoder = static_cast<MediaDecoder*>(aClosure);
   decoder->Progress(true);
 }
 void MediaDecoder::Progress(bool aTimer)
 {
   if (!mOwner)
     return;
   TimeStamp now = TimeStamp::Now();
   if (!aTimer) {
     mDataTime = now;
   }
   // If PROGRESS_MS has passed since the last progress event fired and more
   // data has arrived since then, fire another progress event.
   if ((mProgressTime.IsNull() ||
        now - mProgressTime >= TimeDuration::FromMilliseconds(PROGRESS_MS)) &&
       !mDataTime.IsNull() &&
       now - mDataTime <= TimeDuration::FromMilliseconds(PROGRESS_MS)) {
     mOwner->DispatchAsyncEvent(NS_LITERAL_STRING("progress"));
     mProgressTime = now;
   }
   if (!mDataTime.IsNull() &&
       now - mDataTime >= TimeDuration::FromMilliseconds(STALL_MS)) {
     mOwner->DownloadStalled();
     // Null it out
     mDataTime = TimeStamp();
   }
 }
 nsresult MediaDecoder::StartProgress()
 {
   if (mProgressTimer)
     return NS_OK;
   mProgressTimer = do_CreateInstance("@mozilla.org/timer;1");
   return mProgressTimer->InitWithFuncCallback(ProgressCallback,
                                               this,
                                               PROGRESS_MS,
                                               nsITimer::TYPE_REPEATING_SLACK);
 }
 nsresult MediaDecoder::StopProgress()
 {
   if (!mProgressTimer)
     return NS_OK;
   nsresult rv = mProgressTimer->Cancel();
   mProgressTimer = nullptr;
   return rv;
 }
 void MediaDecoder::FireTimeUpdate()
 {
   if (!mOwner)
     return;
   mOwner->FireTimeUpdate(true);
 }
 void MediaDecoder::PinForSeek()
 {
   MediaResource* resource = GetResource();
   if (!resource || mPinnedForSeek) {
     return;
   }
   mPinnedForSeek = true;
   resource->Pin();
 }
 void MediaDecoder::UnpinForSeek()
 {
   MediaResource* resource = GetResource();
   if (!resource || !mPinnedForSeek) {
     return;
   }
   mPinnedForSeek = false;
   resource->Unpin();
 }
 bool MediaDecoder::CanPlayThrough()
 {
   Statistics stats = GetStatistics();
   if (!stats.mDownloadRateReliable || !stats.mPlaybackRateReliable) {
     return false;
   }
   int64_t bytesToDownload = stats.mTotalBytes - stats.mDownloadPosition;
   int64_t bytesToPlayback = stats.mTotalBytes - stats.mPlaybackPosition;
   double timeToDownload = bytesToDownload / stats.mDownloadRate;
   double timeToPlay = bytesToPlayback / stats.mPlaybackRate;
   if (timeToDownload > timeToPlay) {
     // Estimated time to download is greater than the estimated time to play.
     // We probably can't play through without having to stop to buffer.
     return false;
   }
   // Estimated time to download is less than the estimated time to play.
   // We can probably play through without having to buffer, but ensure that
   // we've got a reasonable amount of data buffered after the current
   // playback position, so that if the bitrate of the media fluctuates, or if
   // our download rate or decode rate estimation is otherwise inaccurate,
   // we don't suddenly discover that we need to buffer. This is particularly
   // required near the start of the media, when not much data is downloaded.
   int64_t readAheadMargin =
     static_cast<int64_t>(stats.mPlaybackRate * CAN_PLAY_THROUGH_MARGIN);
   return stats.mTotalBytes == stats.mDownloadPosition ||
          stats.mDownloadPosition > stats.mPlaybackPosition + readAheadMargin;
 }
 #ifdef MOZ_RAW
 bool
 MediaDecoder::IsRawEnabled()
 {
   return Preferences::GetBool("media.raw.enabled");
 }
 #endif
 bool
 MediaDecoder::IsOpusEnabled()
 {
 #ifdef MOZ_OPUS
   return Preferences::GetBool("media.opus.enabled");
 #else
   return false;
 #endif
 }
 bool
 MediaDecoder::IsOggEnabled()
 {
   return Preferences::GetBool("media.ogg.enabled");
 }
 #ifdef MOZ_WAVE
 bool
 MediaDecoder::IsWaveEnabled()
 {
   return Preferences::GetBool("media.wave.enabled");
 }
 #endif
 #ifdef MOZ_WEBM
 bool
 MediaDecoder::IsWebMEnabled()
 {
   return Preferences::GetBool("media.webm.enabled");
 }
 #endif
 #ifdef NECKO_PROTOCOL_rtsp
 bool
 MediaDecoder::IsRtspEnabled()
 {
   //Currently the Rtsp decoded by omx.
   return (Preferences::GetBool("media.rtsp.enabled", false) && IsOmxEnabled());
 }
 #endif
 #ifdef MOZ_GSTREAMER
 bool
 MediaDecoder::IsGStreamerEnabled()
 {
   return Preferences::GetBool("media.gstreamer.enabled");
 }
 #endif
 #ifdef MOZ_OMX_DECODER
 bool
 MediaDecoder::IsOmxEnabled()
 {
   return Preferences::GetBool("media.omx.enabled", false);
 }
 #endif
 #ifdef MOZ_MEDIA_PLUGINS
 bool
 MediaDecoder::IsMediaPluginsEnabled()
 {
   return Preferences::GetBool("media.plugins.enabled");
 }
 #endif
 #ifdef MOZ_WMF
 bool
 MediaDecoder::IsWMFEnabled()
 {
   return WMFDecoder::IsEnabled();
 }
 #endif
 #ifdef MOZ_APPLEMEDIA
 bool
 MediaDecoder::IsAppleMP3Enabled()
 {
   return Preferences::GetBool("media.apple.mp3.enabled");
 }
 #endif
 NS_IMETHODIMP
 MediaMemoryTracker::CollectReports(nsIHandleReportCallback* aHandleReport,
                                    nsISupports* aData)
 {
   int64_t video = 0, audio = 0;
   size_t resources = 0;
   DecodersArray& decoders = Decoders();
   for (size_t i = 0; i < decoders.Length(); ++i) {
     MediaDecoder* decoder = decoders[i];
     video += decoder->SizeOfVideoQueue();
     audio += decoder->SizeOfAudioQueue();
     if (decoder->GetResource()) {
       resources += decoder->GetResource()->SizeOfIncludingThis(MallocSizeOf);
     }
   }
 #define REPORT(_path, _amount, _desc)                                         \
   do {                                                                        \
       nsresult rv;                                                            \
       rv = aHandleReport->Callback(EmptyCString(), NS_LITERAL_CSTRING(_path), \
                                    KIND_HEAP, UNITS_BYTES, _amount,           \
                                    NS_LITERAL_CSTRING(_desc), aData);         \
       NS_ENSURE_SUCCESS(rv, rv);                                              \
   } while (0)
   REPORT("explicit/media/decoded/video", video,
          "Memory used by decoded video frames.");
   REPORT("explicit/media/decoded/audio", audio,
          "Memory used by decoded audio chunks.");
   REPORT("explicit/media/resources", resources,
          "Memory used by media resources including streaming buffers, caches, "
          "etc.");
 #undef REPORT
   return NS_OK;
 }
 MediaDecoderOwner*
 MediaDecoder::GetOwner()
 {
   MOZ_ASSERT(NS_IsMainThread());
   return mOwner;
 }
 MediaMemoryTracker::MediaMemoryTracker()
 {
 }
 void
 MediaMemoryTracker::InitMemoryReporter()
 {
   RegisterWeakMemoryReporter(this);
 }
 MediaMemoryTracker::~MediaMemoryTracker()
 {
   UnregisterWeakMemoryReporter(this);
 }
 } // namespace mozilla
 // avoid redefined macro in unified build
 #undef DECODER_LOG

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content/media/MediaDecoder.cpp@97036ab72558 (annotated)

content/media/MediaDecoder.cpp