Bug 1053658 - Split MSDecoder and MSReader into separate files. r=cajbir

--HG--
rename : content/media/mediasource/MediaSourceDecoder.cpp => content/media/mediasource/MediaSourceReader.cpp
extra : rebase_source : 2fb1adcbf8795259b45bae58fa8fa342b6235bae
This commit is contained in:
Matthew Gregan 2014-08-14 00:22:00 +12:00
parent 7465be451d
commit 247d934871
5 changed files with 586 additions and 489 deletions

View File

@ -3,31 +3,14 @@
/* 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 "MediaSourceResource.h"
#include "MediaSourceDecoder.h"
#include "AbstractMediaDecoder.h"
#include "MediaDecoderReader.h"
#include "MediaDecoderStateMachine.h"
#include "mozilla/Assertions.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/dom/TimeRanges.h"
#include "mozilla/mozalloc.h"
#include "nsAutoPtr.h"
#include "nsISupports.h"
#include "nsIThread.h"
#include "prlog.h"
#include "MediaDecoderStateMachine.h"
#include "MediaSource.h"
#include "SubBufferDecoder.h"
#include "SourceBufferResource.h"
#include "SourceBufferList.h"
#include "VideoUtils.h"
#ifdef MOZ_FMP4
#include "MP4Decoder.h"
#include "MP4Reader.h"
#endif
#include "MediaSourceReader.h"
#include "MediaSourceResource.h"
#ifdef PR_LOGGING
extern PRLogModuleInfo* GetMediaSourceLog();
@ -44,223 +27,7 @@ extern PRLogModuleInfo* GetMediaSourceAPILog();
namespace mozilla {
class MediaSourceReader : public MediaDecoderReader
{
public:
MediaSourceReader(MediaSourceDecoder* aDecoder, dom::MediaSource* aSource)
: MediaDecoderReader(aDecoder)
, mTimeThreshold(-1)
, mDropVideoBeforeThreshold(false)
, mActiveVideoDecoder(-1)
, mActiveAudioDecoder(-1)
, mMediaSource(aSource)
{
}
nsresult Init(MediaDecoderReader* aCloneDonor) MOZ_OVERRIDE
{
// Although we technically don't implement anything here, we return NS_OK
// so that when the state machine initializes and calls this function
// we don't return an error code back to the media element.
return NS_OK;
}
bool IsWaitingMediaResources() MOZ_OVERRIDE
{
return mDecoders.IsEmpty() && mPendingDecoders.IsEmpty();
}
void RequestAudioData() MOZ_OVERRIDE
{
if (!GetAudioReader()) {
MSE_DEBUG("MediaSourceReader(%p)::RequestAudioData called with no audio reader", this);
MOZ_ASSERT(mPendingDecoders.IsEmpty());
GetCallback()->OnDecodeError();
return;
}
GetAudioReader()->RequestAudioData();
}
void OnAudioDecoded(AudioData* aSample)
{
GetCallback()->OnAudioDecoded(aSample);
}
void OnAudioEOS()
{
MSE_DEBUG("MediaSourceReader(%p)::OnAudioEOS %d (%p) EOS (readers=%u)",
this, mActiveAudioDecoder, mDecoders[mActiveAudioDecoder].get(), mDecoders.Length());
GetCallback()->OnAudioEOS();
}
void RequestVideoData(bool aSkipToNextKeyframe, int64_t aTimeThreshold) MOZ_OVERRIDE
{
if (!GetVideoReader()) {
MSE_DEBUG("MediaSourceReader(%p)::RequestVideoData called with no video reader", this);
MOZ_ASSERT(mPendingDecoders.IsEmpty());
GetCallback()->OnDecodeError();
return;
}
mTimeThreshold = aTimeThreshold;
SwitchVideoReaders(SWITCH_OPTIONAL);
GetVideoReader()->RequestVideoData(aSkipToNextKeyframe, aTimeThreshold);
}
void OnVideoDecoded(VideoData* aSample)
{
if (mDropVideoBeforeThreshold) {
if (aSample->mTime < mTimeThreshold) {
MSE_DEBUG("MediaSourceReader(%p)::OnVideoDecoded mTime=%lld < mTimeThreshold=%lld",
this, aSample->mTime, mTimeThreshold);
delete aSample;
GetVideoReader()->RequestVideoData(false, mTimeThreshold);
return;
}
mDropVideoBeforeThreshold = false;
}
GetCallback()->OnVideoDecoded(aSample);
}
void OnVideoEOS()
{
// End of stream. See if we can switch to another video decoder.
MSE_DEBUG("MediaSourceReader(%p)::OnVideoEOS %d (%p) (readers=%u)",
this, mActiveVideoDecoder, mDecoders[mActiveVideoDecoder].get(), mDecoders.Length());
if (SwitchVideoReaders(SWITCH_FORCED)) {
// Success! Resume decoding with next video decoder.
RequestVideoData(false, mTimeThreshold);
} else {
// End of stream.
MSE_DEBUG("MediaSourceReader(%p)::OnVideoEOS %d (%p) EOS (readers=%u)",
this, mActiveVideoDecoder, mDecoders[mActiveVideoDecoder].get(), mDecoders.Length());
GetCallback()->OnVideoEOS();
}
}
void OnDecodeError() {
GetCallback()->OnDecodeError();
}
bool HasVideo() MOZ_OVERRIDE
{
return mInfo.HasVideo();
}
bool HasAudio() MOZ_OVERRIDE
{
return mInfo.HasAudio();
}
bool IsMediaSeekable() { return true; }
nsresult ReadMetadata(MediaInfo* aInfo, MetadataTags** aTags) MOZ_OVERRIDE;
nsresult Seek(int64_t aTime, int64_t aStartTime, int64_t aEndTime,
int64_t aCurrentTime) MOZ_OVERRIDE;
already_AddRefed<SubBufferDecoder> CreateSubDecoder(const nsACString& aType,
MediaSourceDecoder* aParentDecoder,
MediaTaskQueue* aTaskQueue);
void Shutdown() MOZ_OVERRIDE {
MediaDecoderReader::Shutdown();
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
mDecoders[i]->GetReader()->Shutdown();
}
}
virtual void BreakCycles() MOZ_OVERRIDE {
MediaDecoderReader::BreakCycles();
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
mDecoders[i]->GetReader()->BreakCycles();
}
}
void InitializePendingDecoders();
bool IsShutdown() {
ReentrantMonitorAutoEnter decoderMon(mDecoder->GetReentrantMonitor());
return mDecoder->IsShutdown();
}
// Return true if any of the active decoders contain data for the given time
bool DecodersContainTime(double aTime);
private:
// These are read and written on the decode task queue threads.
int64_t mTimeThreshold;
bool mDropVideoBeforeThreshold;
enum SwitchType {
SWITCH_OPTIONAL,
SWITCH_FORCED
};
bool SwitchVideoReaders(SwitchType aType) {
ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
MOZ_ASSERT(mActiveVideoDecoder != -1);
InitializePendingDecoders();
for (uint32_t i = mActiveVideoDecoder + 1; i < mDecoders.Length(); ++i) {
SubBufferDecoder* decoder = mDecoders[i];
nsRefPtr<dom::TimeRanges> ranges = new dom::TimeRanges();
decoder->GetBuffered(ranges);
MSE_DEBUGV("MediaDecoderReader(%p)::SwitchVideoReaders(%d) decoder=%u (%p) discarded=%d"
" hasVideo=%d timeThreshold=%f startTime=%f endTime=%f length=%u",
this, aType, i, decoder, decoder->IsDiscarded(),
decoder->GetReader()->GetMediaInfo().HasVideo(),
double(mTimeThreshold) / USECS_PER_S,
ranges->GetStartTime(), ranges->GetEndTime(), ranges->Length());
if (decoder->IsDiscarded() ||
!decoder->GetReader()->GetMediaInfo().HasVideo() ||
ranges->Length() == 0) {
continue;
}
if (aType == SWITCH_FORCED ||
ranges->Find(double(mTimeThreshold) / USECS_PER_S) != dom::TimeRanges::NoIndex) {
GetVideoReader()->SetIdle();
mActiveVideoDecoder = i;
mDropVideoBeforeThreshold = true;
MSE_DEBUG("MediaDecoderReader(%p)::SwitchVideoReaders(%d) switching to %d (%p)",
this, aType, mActiveVideoDecoder, mDecoders[mActiveVideoDecoder].get());
return true;
}
}
return false;
}
MediaDecoderReader* GetAudioReader() {
if (mActiveAudioDecoder == -1) {
return nullptr;
}
return mDecoders[mActiveAudioDecoder]->GetReader();
}
MediaDecoderReader* GetVideoReader() {
if (mActiveVideoDecoder == -1) {
return nullptr;
}
return mDecoders[mActiveVideoDecoder]->GetReader();
}
void SetMediaSourceDuration(double aDuration) {
MOZ_ASSERT(NS_IsMainThread());
ErrorResult dummy;
mMediaSource->SetDuration(aDuration, dummy);
}
nsTArray<nsRefPtr<SubBufferDecoder>> mPendingDecoders;
nsTArray<nsRefPtr<SubBufferDecoder>> mDecoders;
int32_t mActiveVideoDecoder;
int32_t mActiveAudioDecoder;
dom::MediaSource* mMediaSource;
};
class SubBufferDecoder;
class MediaSourceStateMachine : public MediaDecoderStateMachine
{
@ -398,249 +165,4 @@ MediaSourceDecoder::EnqueueDecoderInitialization()
return sm->EnqueueDecoderInitialization();
}
class ReleaseDecodersTask : public nsRunnable {
public:
ReleaseDecodersTask(nsTArray<nsRefPtr<SubBufferDecoder>>& aDecoders)
{
mDecoders.SwapElements(aDecoders);
}
NS_IMETHOD Run() MOZ_OVERRIDE MOZ_FINAL {
mDecoders.Clear();
return NS_OK;
}
private:
nsTArray<nsRefPtr<SubBufferDecoder>> mDecoders;
};
void
MediaSourceReader::InitializePendingDecoders()
{
ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
for (uint32_t i = 0; i < mPendingDecoders.Length(); ++i) {
nsRefPtr<SubBufferDecoder> decoder = mPendingDecoders[i];
MediaDecoderReader* reader = decoder->GetReader();
MSE_DEBUG("MediaSourceReader(%p): Initializing subdecoder %p reader %p",
this, decoder.get(), reader);
MediaInfo mi;
nsAutoPtr<MetadataTags> tags; // TODO: Handle metadata.
nsresult rv;
{
ReentrantMonitorAutoExit exitMon(mDecoder->GetReentrantMonitor());
rv = reader->ReadMetadata(&mi, getter_Transfers(tags));
}
reader->SetIdle();
if (NS_FAILED(rv)) {
// XXX: Need to signal error back to owning SourceBuffer.
MSE_DEBUG("MediaSourceReader(%p): Reader %p failed to initialize rv=%x",
this, reader, rv);
continue;
}
bool active = false;
if (mi.HasVideo() || mi.HasAudio()) {
MSE_DEBUG("MediaSourceReader(%p): Reader %p has video=%d audio=%d",
this, reader, mi.HasVideo(), mi.HasAudio());
if (mi.HasVideo()) {
MSE_DEBUG("MediaSourceReader(%p): Reader %p video resolution=%dx%d",
this, reader, mi.mVideo.mDisplay.width, mi.mVideo.mDisplay.height);
}
if (mi.HasAudio()) {
MSE_DEBUG("MediaSourceReader(%p): Reader %p audio sampleRate=%d channels=%d",
this, reader, mi.mAudio.mRate, mi.mAudio.mChannels);
}
active = true;
}
if (active) {
mDecoders.AppendElement(decoder);
} else {
MSE_DEBUG("MediaSourceReader(%p): Reader %p not activated", this, reader);
}
}
NS_DispatchToMainThread(new ReleaseDecodersTask(mPendingDecoders));
MOZ_ASSERT(mPendingDecoders.IsEmpty());
mDecoder->NotifyWaitingForResourcesStatusChanged();
}
MediaDecoderReader*
CreateReaderForType(const nsACString& aType, AbstractMediaDecoder* aDecoder)
{
#ifdef MOZ_FMP4
// The MP4Reader that supports fragmented MP4 and uses
// PlatformDecoderModules is hidden behind prefs for regular video
// elements, but we always want to use it for MSE, so instantiate it
// directly here.
if ((aType.LowerCaseEqualsLiteral("video/mp4") ||
aType.LowerCaseEqualsLiteral("audio/mp4")) &&
MP4Decoder::IsEnabled()) {
return new MP4Reader(aDecoder);
}
#endif
return DecoderTraits::CreateReader(aType, aDecoder);
}
already_AddRefed<SubBufferDecoder>
MediaSourceReader::CreateSubDecoder(const nsACString& aType,
MediaSourceDecoder* aParentDecoder,
MediaTaskQueue* aTaskQueue)
{
// XXX: Why/when is mDecoder null here, since it should be equal to aParentDecoder?!
nsRefPtr<SubBufferDecoder> decoder =
new SubBufferDecoder(new SourceBufferResource(nullptr, aType), aParentDecoder);
nsRefPtr<MediaDecoderReader> reader(CreateReaderForType(aType, decoder));
if (!reader) {
return nullptr;
}
// Set a callback on the subreader that forwards calls to this reader.
// This reader will then forward them onto the state machine via this
// reader's callback.
RefPtr<MediaDataDecodedListener<MediaSourceReader>> callback =
new MediaDataDecodedListener<MediaSourceReader>(this, aTaskQueue);
reader->SetCallback(callback);
reader->SetTaskQueue(aTaskQueue);
reader->Init(nullptr);
ReentrantMonitorAutoEnter mon(aParentDecoder->GetReentrantMonitor());
MSE_DEBUG("MediaSourceReader(%p)::CreateSubDecoder subdecoder %p subreader %p",
this, decoder.get(), reader.get());
decoder->SetReader(reader);
mPendingDecoders.AppendElement(decoder);
if (NS_FAILED(static_cast<MediaSourceDecoder*>(mDecoder)->EnqueueDecoderInitialization())) {
MSE_DEBUG("MediaSourceReader(%p): Failed to enqueue decoder initialization task", this);
return nullptr;
}
mDecoder->NotifyWaitingForResourcesStatusChanged();
return decoder.forget();
}
namespace {
class ChangeToHaveMetadata : public nsRunnable {
public:
ChangeToHaveMetadata(AbstractMediaDecoder* aDecoder) :
mDecoder(aDecoder)
{
}
NS_IMETHOD Run() MOZ_OVERRIDE MOZ_FINAL {
auto owner = mDecoder->GetOwner();
if (owner) {
owner->UpdateReadyStateForData(MediaDecoderOwner::NEXT_FRAME_WAIT_FOR_MSE_DATA);
}
return NS_OK;
}
private:
nsRefPtr<AbstractMediaDecoder> mDecoder;
};
}
bool
MediaSourceReader::DecodersContainTime(double aTime)
{
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
if (!mDecoders[i]->IsDiscarded() && mDecoders[i]->ContainsTime(aTime)) {
return true;
}
}
return false;
}
nsresult
MediaSourceReader::Seek(int64_t aTime, int64_t aStartTime, int64_t aEndTime,
int64_t aCurrentTime)
{
MSE_DEBUG("MediaSourceReader(%p)::Seek(aTime=%lld, aStart=%lld, aEnd=%lld, aCurrent=%lld)",
this, aTime, aStartTime, aEndTime, aCurrentTime);
double target = static_cast<double>(aTime) / USECS_PER_S;
if (!DecodersContainTime(target)) {
MSE_DEBUG("MediaSourceReader(%p)::Seek no active buffer contains target=%f", this, target);
NS_DispatchToMainThread(new ChangeToHaveMetadata(mDecoder));
}
// Loop until we have the requested time range in the source buffers.
// This is a workaround for our lack of async functionality in the
// MediaDecoderStateMachine. Bug 979104 implements what we need and
// we'll remove this for an async approach based on that in bug XXXXXXX.
while (!DecodersContainTime(target)
&& !IsShutdown()) {
MSE_DEBUG("MediaSourceReader(%p)::Seek waiting for target=%f", this, target);
mMediaSource->WaitForData();
SwitchVideoReaders(SWITCH_FORCED);
}
if (IsShutdown()) {
return NS_OK;
}
ResetDecode();
if (GetAudioReader()) {
nsresult rv = GetAudioReader()->Seek(aTime, aStartTime, aEndTime, aCurrentTime);
if (NS_FAILED(rv)) {
return rv;
}
}
if (GetVideoReader()) {
nsresult rv = GetVideoReader()->Seek(aTime, aStartTime, aEndTime, aCurrentTime);
if (NS_FAILED(rv)) {
return rv;
}
}
return NS_OK;
}
nsresult
MediaSourceReader::ReadMetadata(MediaInfo* aInfo, MetadataTags** aTags)
{
InitializePendingDecoders();
MSE_DEBUG("MediaSourceReader(%p)::ReadMetadata decoders=%u", this, mDecoders.Length());
// XXX: Make subdecoder setup async, so that use cases like bug 989888 can
// work. This will require teaching the state machine about dynamic track
// changes (and multiple tracks).
// Shorter term, make this block until we've got at least one video track
// and lie about having an audio track, then resample/remix as necessary
// to match any audio track added later to fit the format we lied about
// now. For now we just configure what we've got and cross our fingers.
int64_t maxDuration = -1;
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
MediaDecoderReader* reader = mDecoders[i]->GetReader();
MediaInfo mi = reader->GetMediaInfo();
if (mi.HasVideo() && !mInfo.HasVideo()) {
MOZ_ASSERT(mActiveVideoDecoder == -1);
mActiveVideoDecoder = i;
mInfo.mVideo = mi.mVideo;
maxDuration = std::max(maxDuration, mDecoders[i]->GetMediaDuration());
MSE_DEBUG("MediaSourceReader(%p)::ReadMetadata video decoder=%u maxDuration=%lld",
this, i, maxDuration);
}
if (mi.HasAudio() && !mInfo.HasAudio()) {
MOZ_ASSERT(mActiveAudioDecoder == -1);
mActiveAudioDecoder = i;
mInfo.mAudio = mi.mAudio;
maxDuration = std::max(maxDuration, mDecoders[i]->GetMediaDuration());
MSE_DEBUG("MediaSourceReader(%p)::ReadMetadata audio decoder=%u maxDuration=%lld",
this, i, maxDuration);
}
}
if (maxDuration != -1) {
ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
mDecoder->SetMediaDuration(maxDuration);
nsRefPtr<nsIRunnable> task (
NS_NewRunnableMethodWithArg<double>(this, &MediaSourceReader::SetMediaSourceDuration,
static_cast<double>(maxDuration) / USECS_PER_S));
NS_DispatchToMainThread(task);
}
*aInfo = mInfo;
*aTags = nullptr; // TODO: Handle metadata.
return NS_OK;
}
} // namespace mozilla

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@ -7,24 +7,18 @@
#ifndef MOZILLA_MEDIASOURCEDECODER_H_
#define MOZILLA_MEDIASOURCEDECODER_H_
#include "MediaCache.h"
#include "MediaDecoder.h"
#include "mozilla/Attributes.h"
#include "mozilla/ReentrantMonitor.h"
#include "nsCOMPtr.h"
#include "nsError.h"
#include "nsStringGlue.h"
#include "nsTArray.h"
#include "MediaDecoder.h"
class nsIStreamListener;
namespace mozilla {
class MediaResource;
class MediaDecoderReader;
class MediaDecoderStateMachine;
class SubBufferDecoder;
class MediaSourceReader;
namespace dom {

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@ -0,0 +1,461 @@
/* -*- 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 "MediaSourceReader.h"
#include "mozilla/dom/TimeRanges.h"
#include "DecoderTraits.h"
#include "MediaDataDecodedListener.h"
#include "MediaDecoderOwner.h"
#include "MediaSource.h"
#include "MediaSourceDecoder.h"
#include "SubBufferDecoder.h"
#ifdef MOZ_FMP4
#include "MP4Decoder.h"
#include "MP4Reader.h"
#endif
#ifdef PR_LOGGING
extern PRLogModuleInfo* GetMediaSourceLog();
extern PRLogModuleInfo* GetMediaSourceAPILog();
#define MSE_DEBUG(...) PR_LOG(GetMediaSourceLog(), PR_LOG_DEBUG, (__VA_ARGS__))
#define MSE_DEBUGV(...) PR_LOG(GetMediaSourceLog(), PR_LOG_DEBUG+1, (__VA_ARGS__))
#define MSE_API(...) PR_LOG(GetMediaSourceAPILog(), PR_LOG_DEBUG, (__VA_ARGS__))
#else
#define MSE_DEBUG(...)
#define MSE_DEBUGV(...)
#define MSE_API(...)
#endif
namespace mozilla {
MediaSourceReader::MediaSourceReader(MediaSourceDecoder* aDecoder, dom::MediaSource* aSource)
: MediaDecoderReader(aDecoder)
, mTimeThreshold(-1)
, mDropVideoBeforeThreshold(false)
, mActiveVideoDecoder(-1)
, mActiveAudioDecoder(-1)
, mMediaSource(aSource)
{
}
bool
MediaSourceReader::IsWaitingMediaResources()
{
return mDecoders.IsEmpty() && mPendingDecoders.IsEmpty();
}
void
MediaSourceReader::RequestAudioData()
{
if (!GetAudioReader()) {
MSE_DEBUG("MediaSourceReader(%p)::RequestAudioData called with no audio reader", this);
MOZ_ASSERT(mPendingDecoders.IsEmpty());
GetCallback()->OnDecodeError();
return;
}
GetAudioReader()->RequestAudioData();
}
void
MediaSourceReader::OnAudioDecoded(AudioData* aSample)
{
GetCallback()->OnAudioDecoded(aSample);
}
void
MediaSourceReader::OnAudioEOS()
{
MSE_DEBUG("MediaSourceReader(%p)::OnAudioEOS %d (%p) EOS (readers=%u)",
this, mActiveAudioDecoder, mDecoders[mActiveAudioDecoder].get(), mDecoders.Length());
GetCallback()->OnAudioEOS();
}
void
MediaSourceReader::RequestVideoData(bool aSkipToNextKeyframe, int64_t aTimeThreshold)
{
if (!GetVideoReader()) {
MSE_DEBUG("MediaSourceReader(%p)::RequestVideoData called with no video reader", this);
MOZ_ASSERT(mPendingDecoders.IsEmpty());
GetCallback()->OnDecodeError();
return;
}
mTimeThreshold = aTimeThreshold;
SwitchVideoReaders(SWITCH_OPTIONAL);
GetVideoReader()->RequestVideoData(aSkipToNextKeyframe, aTimeThreshold);
}
void
MediaSourceReader::OnVideoDecoded(VideoData* aSample)
{
if (mDropVideoBeforeThreshold) {
if (aSample->mTime < mTimeThreshold) {
MSE_DEBUG("MediaSourceReader(%p)::OnVideoDecoded mTime=%lld < mTimeThreshold=%lld",
this, aSample->mTime, mTimeThreshold);
delete aSample;
GetVideoReader()->RequestVideoData(false, mTimeThreshold);
return;
}
mDropVideoBeforeThreshold = false;
}
GetCallback()->OnVideoDecoded(aSample);
}
void
MediaSourceReader::OnVideoEOS()
{
// End of stream. See if we can switch to another video decoder.
MSE_DEBUG("MediaSourceReader(%p)::OnVideoEOS %d (%p) (readers=%u)",
this, mActiveVideoDecoder, mDecoders[mActiveVideoDecoder].get(), mDecoders.Length());
if (SwitchVideoReaders(SWITCH_FORCED)) {
// Success! Resume decoding with next video decoder.
RequestVideoData(false, mTimeThreshold);
} else {
// End of stream.
MSE_DEBUG("MediaSourceReader(%p)::OnVideoEOS %d (%p) EOS (readers=%u)",
this, mActiveVideoDecoder, mDecoders[mActiveVideoDecoder].get(), mDecoders.Length());
GetCallback()->OnVideoEOS();
}
}
void
MediaSourceReader::OnDecodeError()
{
GetCallback()->OnDecodeError();
}
void
MediaSourceReader::Shutdown()
{
MediaDecoderReader::Shutdown();
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
mDecoders[i]->GetReader()->Shutdown();
}
}
void
MediaSourceReader::BreakCycles()
{
MediaDecoderReader::BreakCycles();
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
mDecoders[i]->GetReader()->BreakCycles();
}
}
bool
MediaSourceReader::SwitchVideoReaders(SwitchType aType)
{
ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
MOZ_ASSERT(mActiveVideoDecoder != -1);
InitializePendingDecoders();
for (uint32_t i = mActiveVideoDecoder + 1; i < mDecoders.Length(); ++i) {
SubBufferDecoder* decoder = mDecoders[i];
nsRefPtr<dom::TimeRanges> ranges = new dom::TimeRanges();
decoder->GetBuffered(ranges);
MSE_DEBUGV("MediaDecoderReader(%p)::SwitchVideoReaders(%d) decoder=%u (%p) discarded=%d"
" hasVideo=%d timeThreshold=%f startTime=%f endTime=%f length=%u",
this, aType, i, decoder, decoder->IsDiscarded(),
decoder->GetReader()->GetMediaInfo().HasVideo(),
double(mTimeThreshold) / USECS_PER_S,
ranges->GetStartTime(), ranges->GetEndTime(), ranges->Length());
if (decoder->IsDiscarded() ||
!decoder->GetReader()->GetMediaInfo().HasVideo() ||
ranges->Length() == 0) {
continue;
}
if (aType == SWITCH_FORCED ||
ranges->Find(double(mTimeThreshold) / USECS_PER_S) != dom::TimeRanges::NoIndex) {
GetVideoReader()->SetIdle();
mActiveVideoDecoder = i;
mDropVideoBeforeThreshold = true;
MSE_DEBUG("MediaDecoderReader(%p)::SwitchVideoReaders(%d) switching to %d (%p)",
this, aType, mActiveVideoDecoder, mDecoders[mActiveVideoDecoder].get());
return true;
}
}
return false;
}
MediaDecoderReader*
MediaSourceReader::GetAudioReader()
{
if (mActiveAudioDecoder == -1) {
return nullptr;
}
return mDecoders[mActiveAudioDecoder]->GetReader();
}
MediaDecoderReader*
MediaSourceReader::GetVideoReader()
{
if (mActiveVideoDecoder == -1) {
return nullptr;
}
return mDecoders[mActiveVideoDecoder]->GetReader();
}
void
MediaSourceReader::SetMediaSourceDuration(double aDuration)
{
MOZ_ASSERT(NS_IsMainThread());
ErrorResult dummy;
mMediaSource->SetDuration(aDuration, dummy);
}
class ReleaseDecodersTask : public nsRunnable {
public:
ReleaseDecodersTask(nsTArray<nsRefPtr<SubBufferDecoder>>& aDecoders)
{
mDecoders.SwapElements(aDecoders);
}
NS_IMETHOD Run() MOZ_OVERRIDE MOZ_FINAL {
mDecoders.Clear();
return NS_OK;
}
private:
nsTArray<nsRefPtr<SubBufferDecoder>> mDecoders;
};
void
MediaSourceReader::InitializePendingDecoders()
{
ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
for (uint32_t i = 0; i < mPendingDecoders.Length(); ++i) {
nsRefPtr<SubBufferDecoder> decoder = mPendingDecoders[i];
MediaDecoderReader* reader = decoder->GetReader();
MSE_DEBUG("MediaSourceReader(%p): Initializing subdecoder %p reader %p",
this, decoder.get(), reader);
MediaInfo mi;
nsAutoPtr<MetadataTags> tags; // TODO: Handle metadata.
nsresult rv;
{
ReentrantMonitorAutoExit exitMon(mDecoder->GetReentrantMonitor());
rv = reader->ReadMetadata(&mi, getter_Transfers(tags));
}
reader->SetIdle();
if (NS_FAILED(rv)) {
// XXX: Need to signal error back to owning SourceBuffer.
MSE_DEBUG("MediaSourceReader(%p): Reader %p failed to initialize rv=%x", this, reader, rv);
continue;
}
bool active = false;
if (mi.HasVideo() || mi.HasAudio()) {
MSE_DEBUG("MediaSourceReader(%p): Reader %p has video=%d audio=%d",
this, reader, mi.HasVideo(), mi.HasAudio());
if (mi.HasVideo()) {
MSE_DEBUG("MediaSourceReader(%p): Reader %p video resolution=%dx%d",
this, reader, mi.mVideo.mDisplay.width, mi.mVideo.mDisplay.height);
}
if (mi.HasAudio()) {
MSE_DEBUG("MediaSourceReader(%p): Reader %p audio sampleRate=%d channels=%d",
this, reader, mi.mAudio.mRate, mi.mAudio.mChannels);
}
active = true;
}
if (active) {
mDecoders.AppendElement(decoder);
} else {
MSE_DEBUG("MediaSourceReader(%p): Reader %p not activated", this, reader);
}
}
NS_DispatchToMainThread(new ReleaseDecodersTask(mPendingDecoders));
MOZ_ASSERT(mPendingDecoders.IsEmpty());
mDecoder->NotifyWaitingForResourcesStatusChanged();
}
MediaDecoderReader*
CreateReaderForType(const nsACString& aType, AbstractMediaDecoder* aDecoder)
{
#ifdef MOZ_FMP4
// The MP4Reader that supports fragmented MP4 and uses
// PlatformDecoderModules is hidden behind prefs for regular video
// elements, but we always want to use it for MSE, so instantiate it
// directly here.
if ((aType.LowerCaseEqualsLiteral("video/mp4") ||
aType.LowerCaseEqualsLiteral("audio/mp4")) &&
MP4Decoder::IsEnabled()) {
return new MP4Reader(aDecoder);
}
#endif
return DecoderTraits::CreateReader(aType, aDecoder);
}
already_AddRefed<SubBufferDecoder>
MediaSourceReader::CreateSubDecoder(const nsACString& aType,
MediaSourceDecoder* aParentDecoder,
MediaTaskQueue* aTaskQueue)
{
// XXX: Why/when is mDecoder null here, since it should be equal to aParentDecoder?!
nsRefPtr<SubBufferDecoder> decoder =
new SubBufferDecoder(new SourceBufferResource(nullptr, aType), aParentDecoder);
nsRefPtr<MediaDecoderReader> reader(CreateReaderForType(aType, decoder));
if (!reader) {
return nullptr;
}
// Set a callback on the subreader that forwards calls to this reader.
// This reader will then forward them onto the state machine via this
// reader's callback.
RefPtr<MediaDataDecodedListener<MediaSourceReader>> callback =
new MediaDataDecodedListener<MediaSourceReader>(this, aTaskQueue);
reader->SetCallback(callback);
reader->SetTaskQueue(aTaskQueue);
reader->Init(nullptr);
ReentrantMonitorAutoEnter mon(aParentDecoder->GetReentrantMonitor());
MSE_DEBUG("MediaSourceReader(%p)::CreateSubDecoder subdecoder %p subreader %p",
this, decoder.get(), reader.get());
decoder->SetReader(reader);
mPendingDecoders.AppendElement(decoder);
if (NS_FAILED(static_cast<MediaSourceDecoder*>(mDecoder)->EnqueueDecoderInitialization())) {
MSE_DEBUG("MediaSourceReader(%p): Failed to enqueue decoder initialization task", this);
return nullptr;
}
mDecoder->NotifyWaitingForResourcesStatusChanged();
return decoder.forget();
}
namespace {
class ChangeToHaveMetadata : public nsRunnable {
public:
ChangeToHaveMetadata(AbstractMediaDecoder* aDecoder) :
mDecoder(aDecoder)
{
}
NS_IMETHOD Run() MOZ_OVERRIDE MOZ_FINAL {
auto owner = mDecoder->GetOwner();
if (owner) {
owner->UpdateReadyStateForData(MediaDecoderOwner::NEXT_FRAME_WAIT_FOR_MSE_DATA);
}
return NS_OK;
}
private:
nsRefPtr<AbstractMediaDecoder> mDecoder;
};
}
bool
MediaSourceReader::DecodersContainTime(double aTime)
{
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
if (!mDecoders[i]->IsDiscarded() && mDecoders[i]->ContainsTime(aTime)) {
return true;
}
}
return false;
}
nsresult
MediaSourceReader::Seek(int64_t aTime, int64_t aStartTime, int64_t aEndTime,
int64_t aCurrentTime)
{
MSE_DEBUG("MediaSourceReader(%p)::Seek(aTime=%lld, aStart=%lld, aEnd=%lld, aCurrent=%lld)",
this, aTime, aStartTime, aEndTime, aCurrentTime);
double target = static_cast<double>(aTime) / USECS_PER_S;
if (!DecodersContainTime(target)) {
MSE_DEBUG("MediaSourceReader(%p)::Seek no active buffer contains target=%f", this, target);
NS_DispatchToMainThread(new ChangeToHaveMetadata(mDecoder));
}
// Loop until we have the requested time range in the source buffers.
// This is a workaround for our lack of async functionality in the
// MediaDecoderStateMachine. Bug 979104 implements what we need and
// we'll remove this for an async approach based on that in bug XXXXXXX.
while (!DecodersContainTime(target)
&& !IsShutdown()) {
MSE_DEBUG("MediaSourceReader(%p)::Seek waiting for target=%f", this, target);
mMediaSource->WaitForData();
SwitchVideoReaders(SWITCH_FORCED);
}
if (IsShutdown()) {
return NS_OK;
}
ResetDecode();
if (GetAudioReader()) {
nsresult rv = GetAudioReader()->Seek(aTime, aStartTime, aEndTime, aCurrentTime);
if (NS_FAILED(rv)) {
return rv;
}
}
if (GetVideoReader()) {
nsresult rv = GetVideoReader()->Seek(aTime, aStartTime, aEndTime, aCurrentTime);
if (NS_FAILED(rv)) {
return rv;
}
}
return NS_OK;
}
nsresult
MediaSourceReader::ReadMetadata(MediaInfo* aInfo, MetadataTags** aTags)
{
InitializePendingDecoders();
MSE_DEBUG("MediaSourceReader(%p)::ReadMetadata decoders=%u", this, mDecoders.Length());
// XXX: Make subdecoder setup async, so that use cases like bug 989888 can
// work. This will require teaching the state machine about dynamic track
// changes (and multiple tracks).
// Shorter term, make this block until we've got at least one video track
// and lie about having an audio track, then resample/remix as necessary
// to match any audio track added later to fit the format we lied about
// now. For now we just configure what we've got and cross our fingers.
int64_t maxDuration = -1;
for (uint32_t i = 0; i < mDecoders.Length(); ++i) {
MediaDecoderReader* reader = mDecoders[i]->GetReader();
MediaInfo mi = reader->GetMediaInfo();
if (mi.HasVideo() && !mInfo.HasVideo()) {
MOZ_ASSERT(mActiveVideoDecoder == -1);
mActiveVideoDecoder = i;
mInfo.mVideo = mi.mVideo;
maxDuration = std::max(maxDuration, mDecoders[i]->GetMediaDuration());
MSE_DEBUG("MediaSourceReader(%p)::ReadMetadata video decoder=%u maxDuration=%lld",
this, i, maxDuration);
}
if (mi.HasAudio() && !mInfo.HasAudio()) {
MOZ_ASSERT(mActiveAudioDecoder == -1);
mActiveAudioDecoder = i;
mInfo.mAudio = mi.mAudio;
maxDuration = std::max(maxDuration, mDecoders[i]->GetMediaDuration());
MSE_DEBUG("MediaSourceReader(%p)::ReadMetadata audio decoder=%u maxDuration=%lld",
this, i, maxDuration);
}
}
if (maxDuration != -1) {
ReentrantMonitorAutoEnter mon(mDecoder->GetReentrantMonitor());
mDecoder->SetMediaDuration(maxDuration);
nsRefPtr<nsIRunnable> task (
NS_NewRunnableMethodWithArg<double>(this, &MediaSourceReader::SetMediaSourceDuration,
static_cast<double>(maxDuration) / USECS_PER_S));
NS_DispatchToMainThread(task);
}
*aInfo = mInfo;
*aTags = nullptr; // TODO: Handle metadata.
return NS_OK;
}
} // namespace mozilla

View File

@ -0,0 +1,119 @@
/* -*- 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/. */
#ifndef MOZILLA_MEDIASOURCEREADER_H_
#define MOZILLA_MEDIASOURCEREADER_H_
#include "mozilla/Attributes.h"
#include "mozilla/ReentrantMonitor.h"
#include "nsCOMPtr.h"
#include "nsError.h"
#include "nsStringGlue.h"
#include "nsTArray.h"
#include "MediaDecoderReader.h"
namespace mozilla {
class MediaSourceDecoder;
class SubBufferDecoder;
namespace dom {
class MediaSource;
} // namespace dom
class MediaSourceReader : public MediaDecoderReader
{
public:
MediaSourceReader(MediaSourceDecoder* aDecoder, dom::MediaSource* aSource);
nsresult Init(MediaDecoderReader* aCloneDonor) MOZ_OVERRIDE
{
// Although we technically don't implement anything here, we return NS_OK
// so that when the state machine initializes and calls this function
// we don't return an error code back to the media element.
return NS_OK;
}
bool IsWaitingMediaResources() MOZ_OVERRIDE;
void RequestAudioData() MOZ_OVERRIDE;
void OnAudioDecoded(AudioData* aSample);
void OnAudioEOS();
void RequestVideoData(bool aSkipToNextKeyframe, int64_t aTimeThreshold) MOZ_OVERRIDE;
void OnVideoDecoded(VideoData* aSample);
void OnVideoEOS();
void OnDecodeError();
bool HasVideo() MOZ_OVERRIDE
{
return mInfo.HasVideo();
}
bool HasAudio() MOZ_OVERRIDE
{
return mInfo.HasAudio();
}
bool IsMediaSeekable() { return true; }
nsresult ReadMetadata(MediaInfo* aInfo, MetadataTags** aTags) MOZ_OVERRIDE;
nsresult Seek(int64_t aTime, int64_t aStartTime, int64_t aEndTime,
int64_t aCurrentTime) MOZ_OVERRIDE;
already_AddRefed<SubBufferDecoder> CreateSubDecoder(const nsACString& aType,
MediaSourceDecoder* aParentDecoder,
MediaTaskQueue* aTaskQueue);
void Shutdown();
virtual void BreakCycles();
void InitializePendingDecoders();
bool IsShutdown()
{
ReentrantMonitorAutoEnter decoderMon(mDecoder->GetReentrantMonitor());
return mDecoder->IsShutdown();
}
// Return true if any of the active decoders contain data for the given time
bool DecodersContainTime(double aTime);
private:
enum SwitchType {
SWITCH_OPTIONAL,
SWITCH_FORCED
};
bool SwitchVideoReaders(SwitchType aType);
MediaDecoderReader* GetAudioReader();
MediaDecoderReader* GetVideoReader();
void SetMediaSourceDuration(double aDuration) ;
// These are read and written on the decode task queue threads.
int64_t mTimeThreshold;
bool mDropVideoBeforeThreshold;
nsTArray<nsRefPtr<SubBufferDecoder>> mPendingDecoders;
nsTArray<nsRefPtr<SubBufferDecoder>> mDecoders;
int32_t mActiveVideoDecoder;
int32_t mActiveAudioDecoder;
dom::MediaSource* mMediaSource;
};
} // namespace mozilla
#endif /* MOZILLA_MEDIASOURCEREADER_H_ */

View File

@ -19,6 +19,7 @@ EXPORTS.mozilla.dom += [
UNIFIED_SOURCES += [
'MediaSource.cpp',
'MediaSourceDecoder.cpp',
'MediaSourceReader.cpp',
'SourceBuffer.cpp',
'SourceBufferList.cpp',
'SourceBufferResource.cpp',