gecko-dev/dom/media/MediaDecoderReader.cpp

462 строки
13 KiB
C++

/* -*- 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 "MediaDecoderReader.h"
#include "AbstractMediaDecoder.h"
#include "MediaResource.h"
#include "VideoUtils.h"
#include "ImageContainer.h"
#include "nsPrintfCString.h"
#include "mozilla/mozalloc.h"
#include <stdint.h>
#include <algorithm>
using namespace mozilla::media;
namespace mozilla {
// Un-comment to enable logging of seek bisections.
//#define SEEK_LOGGING
extern PRLogModuleInfo* gMediaDecoderLog;
#define DECODER_LOG(x, ...) \
MOZ_LOG(gMediaDecoderLog, LogLevel::Debug, ("Decoder=%p " x, mDecoder, ##__VA_ARGS__))
// Same workaround as MediaDecoderStateMachine.cpp.
#define DECODER_WARN_HELPER(a, b) NS_WARNING b
#define DECODER_WARN(x, ...) \
DECODER_WARN_HELPER(0, (nsPrintfCString("Decoder=%p " x, mDecoder, ##__VA_ARGS__).get()))
class VideoQueueMemoryFunctor : public nsDequeFunctor {
public:
VideoQueueMemoryFunctor() : mSize(0) {}
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf);
virtual void* operator()(void* aObject) {
const VideoData* v = static_cast<const VideoData*>(aObject);
mSize += v->SizeOfIncludingThis(MallocSizeOf);
return nullptr;
}
size_t mSize;
};
class AudioQueueMemoryFunctor : public nsDequeFunctor {
public:
AudioQueueMemoryFunctor() : mSize(0) {}
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf);
virtual void* operator()(void* aObject) {
const AudioData* audioData = static_cast<const AudioData*>(aObject);
mSize += audioData->SizeOfIncludingThis(MallocSizeOf);
return nullptr;
}
size_t mSize;
};
MediaDecoderReader::MediaDecoderReader(AbstractMediaDecoder* aDecoder,
TaskQueue* aBorrowedTaskQueue)
: mAudioCompactor(mAudioQueue)
, mDecoder(aDecoder)
, mTaskQueue(aBorrowedTaskQueue ? aBorrowedTaskQueue
: new TaskQueue(GetMediaThreadPool(MediaThreadType::PLAYBACK),
/* aSupportsTailDispatch = */ true))
, mWatchManager(this, mTaskQueue)
, mTimer(new MediaTimer())
, mBuffered(mTaskQueue, TimeIntervals(), "MediaDecoderReader::mBuffered (Canonical)")
, mDuration(mTaskQueue, NullableTimeUnit(), "MediaDecoderReader::mDuration (Mirror)")
, mThrottleDuration(TimeDuration::FromMilliseconds(500))
, mLastThrottledNotify(TimeStamp::Now() - mThrottleDuration)
, mIgnoreAudioOutputFormat(false)
, mHitAudioDecodeError(false)
, mShutdown(false)
, mTaskQueueIsBorrowed(!!aBorrowedTaskQueue)
, mAudioDiscontinuity(false)
, mVideoDiscontinuity(false)
{
MOZ_COUNT_CTOR(MediaDecoderReader);
MOZ_ASSERT(NS_IsMainThread());
// Dispatch initialization that needs to happen on that task queue.
nsCOMPtr<nsIRunnable> r = NS_NewRunnableMethod(this, &MediaDecoderReader::InitializationTask);
mTaskQueue->Dispatch(r.forget());
}
void
MediaDecoderReader::InitializationTask()
{
if (mDecoder->CanonicalDurationOrNull()) {
mDuration.Connect(mDecoder->CanonicalDurationOrNull());
}
// Initialize watchers.
mWatchManager.Watch(mDuration, &MediaDecoderReader::UpdateBuffered);
}
MediaDecoderReader::~MediaDecoderReader()
{
MOZ_ASSERT(mShutdown);
MOZ_ASSERT(!mDecoder);
ResetDecode();
MOZ_COUNT_DTOR(MediaDecoderReader);
}
size_t MediaDecoderReader::SizeOfVideoQueueInBytes() const
{
VideoQueueMemoryFunctor functor;
mVideoQueue.LockedForEach(functor);
return functor.mSize;
}
size_t MediaDecoderReader::SizeOfAudioQueueInBytes() const
{
AudioQueueMemoryFunctor functor;
mAudioQueue.LockedForEach(functor);
return functor.mSize;
}
size_t MediaDecoderReader::SizeOfVideoQueueInFrames()
{
return mVideoQueue.GetSize();
}
size_t MediaDecoderReader::SizeOfAudioQueueInFrames()
{
return mAudioQueue.GetSize();
}
nsresult MediaDecoderReader::ResetDecode()
{
VideoQueue().Reset();
AudioQueue().Reset();
mAudioDiscontinuity = true;
mVideoDiscontinuity = true;
mBaseAudioPromise.RejectIfExists(CANCELED, __func__);
mBaseVideoPromise.RejectIfExists(CANCELED, __func__);
return NS_OK;
}
nsRefPtr<MediaDecoderReader::VideoDataPromise>
MediaDecoderReader::DecodeToFirstVideoData()
{
MOZ_ASSERT(OnTaskQueue());
typedef MediaDecoderReader::VideoDataPromise PromiseType;
nsRefPtr<PromiseType::Private> p = new PromiseType::Private(__func__);
nsRefPtr<MediaDecoderReader> self = this;
InvokeUntil([self] () -> bool {
MOZ_ASSERT(self->OnTaskQueue());
NS_ENSURE_TRUE(!self->mShutdown, false);
bool skip = false;
if (!self->DecodeVideoFrame(skip, 0)) {
self->VideoQueue().Finish();
return !!self->VideoQueue().PeekFront();
}
return true;
}, [self] () -> bool {
MOZ_ASSERT(self->OnTaskQueue());
return self->VideoQueue().GetSize();
})->Then(OwnerThread(), __func__, [self, p] () {
p->Resolve(self->VideoQueue().PeekFront(), __func__);
}, [p] () {
// We don't have a way to differentiate EOS, error, and shutdown here. :-(
p->Reject(END_OF_STREAM, __func__);
});
return p.forget();
}
void
MediaDecoderReader::UpdateBuffered()
{
MOZ_ASSERT(OnTaskQueue());
NS_ENSURE_TRUE_VOID(!mShutdown);
mBuffered = GetBuffered();
}
void
MediaDecoderReader::ThrottledNotifyDataArrived(const Interval<int64_t>& aInterval)
{
MOZ_ASSERT(OnTaskQueue());
NS_ENSURE_TRUE_VOID(!mShutdown);
if (mThrottledInterval.isNothing()) {
mThrottledInterval.emplace(aInterval);
} else if (mThrottledInterval.ref().Contains(aInterval)) {
return;
} else if (!mThrottledInterval.ref().Contiguous(aInterval)) {
DoThrottledNotify();
mThrottledInterval.emplace(aInterval);
} else {
mThrottledInterval = Some(mThrottledInterval.ref().Span(aInterval));
}
// If it's been long enough since our last update, do it.
if (TimeStamp::Now() - mLastThrottledNotify > mThrottleDuration) {
DoThrottledNotify();
} else if (!mThrottledNotify.Exists()) {
// Otherwise, schedule an update if one isn't scheduled already.
nsRefPtr<MediaDecoderReader> self = this;
mThrottledNotify.Begin(
mTimer->WaitUntil(mLastThrottledNotify + mThrottleDuration, __func__)
->Then(OwnerThread(), __func__,
[self] () -> void {
self->mThrottledNotify.Complete();
NS_ENSURE_TRUE_VOID(!self->mShutdown);
self->DoThrottledNotify();
},
[self] () -> void {
self->mThrottledNotify.Complete();
NS_WARNING("throttle callback rejected");
})
);
}
}
void
MediaDecoderReader::DoThrottledNotify()
{
MOZ_ASSERT(OnTaskQueue());
mLastThrottledNotify = TimeStamp::Now();
mThrottledNotify.DisconnectIfExists();
Interval<int64_t> interval = mThrottledInterval.ref();
mThrottledInterval.reset();
NotifyDataArrived(interval);
}
media::TimeIntervals
MediaDecoderReader::GetBuffered()
{
MOZ_ASSERT(OnTaskQueue());
if (!HaveStartTime()) {
return media::TimeIntervals();
}
AutoPinned<MediaResource> stream(mDecoder->GetResource());
if (!mDuration.Ref().isSome()) {
return TimeIntervals();
}
return GetEstimatedBufferedTimeRanges(stream, mDuration.Ref().ref().ToMicroseconds());
}
nsRefPtr<MediaDecoderReader::MetadataPromise>
MediaDecoderReader::AsyncReadMetadata()
{
typedef ReadMetadataFailureReason Reason;
MOZ_ASSERT(OnTaskQueue());
mDecoder->GetReentrantMonitor().AssertNotCurrentThreadIn();
DECODER_LOG("MediaDecoderReader::AsyncReadMetadata");
if (IsWaitingMediaResources()) {
return MetadataPromise::CreateAndReject(Reason::WAITING_FOR_RESOURCES, __func__);
}
// Attempt to read the metadata.
nsRefPtr<MetadataHolder> metadata = new MetadataHolder();
nsresult rv = ReadMetadata(&metadata->mInfo, getter_Transfers(metadata->mTags));
// Reading metadata can cause us to discover that we need resources (a hardware
// resource initialized but not yet ready for use).
if (IsWaitingMediaResources()) {
return MetadataPromise::CreateAndReject(Reason::WAITING_FOR_RESOURCES, __func__);
}
// We're not waiting for anything. If we didn't get the metadata, that's an
// error.
if (NS_FAILED(rv) || !metadata->mInfo.HasValidMedia()) {
DECODER_WARN("ReadMetadata failed, rv=%x HasValidMedia=%d", rv, metadata->mInfo.HasValidMedia());
return MetadataPromise::CreateAndReject(Reason::METADATA_ERROR, __func__);
}
// Success!
return MetadataPromise::CreateAndResolve(metadata, __func__);
}
class ReRequestVideoWithSkipTask : public nsRunnable
{
public:
ReRequestVideoWithSkipTask(MediaDecoderReader* aReader,
int64_t aTimeThreshold)
: mReader(aReader)
, mTimeThreshold(aTimeThreshold)
{
}
NS_METHOD Run()
{
MOZ_ASSERT(mReader->OnTaskQueue());
// Make sure ResetDecode hasn't been called in the mean time.
if (!mReader->mBaseVideoPromise.IsEmpty()) {
mReader->RequestVideoData(/* aSkip = */ true, mTimeThreshold);
}
return NS_OK;
}
private:
nsRefPtr<MediaDecoderReader> mReader;
const int64_t mTimeThreshold;
};
class ReRequestAudioTask : public nsRunnable
{
public:
explicit ReRequestAudioTask(MediaDecoderReader* aReader)
: mReader(aReader)
{
}
NS_METHOD Run()
{
MOZ_ASSERT(mReader->OnTaskQueue());
// Make sure ResetDecode hasn't been called in the mean time.
if (!mReader->mBaseAudioPromise.IsEmpty()) {
mReader->RequestAudioData();
}
return NS_OK;
}
private:
nsRefPtr<MediaDecoderReader> mReader;
};
nsRefPtr<MediaDecoderReader::VideoDataPromise>
MediaDecoderReader::RequestVideoData(bool aSkipToNextKeyframe,
int64_t aTimeThreshold)
{
nsRefPtr<VideoDataPromise> p = mBaseVideoPromise.Ensure(__func__);
bool skip = aSkipToNextKeyframe;
while (VideoQueue().GetSize() == 0 &&
!VideoQueue().IsFinished()) {
if (!DecodeVideoFrame(skip, aTimeThreshold)) {
VideoQueue().Finish();
} else if (skip) {
// We still need to decode more data in order to skip to the next
// keyframe. Post another task to the decode task queue to decode
// again. We don't just decode straight in a loop here, as that
// would hog the decode task queue.
RefPtr<nsIRunnable> task(new ReRequestVideoWithSkipTask(this, aTimeThreshold));
mTaskQueue->Dispatch(task.forget());
return p;
}
}
if (VideoQueue().GetSize() > 0) {
nsRefPtr<VideoData> v = VideoQueue().PopFront();
if (v && mVideoDiscontinuity) {
v->mDiscontinuity = true;
mVideoDiscontinuity = false;
}
mBaseVideoPromise.Resolve(v, __func__);
} else if (VideoQueue().IsFinished()) {
mBaseVideoPromise.Reject(END_OF_STREAM, __func__);
} else {
MOZ_ASSERT(false, "Dropping this promise on the floor");
}
return p;
}
nsRefPtr<MediaDecoderReader::AudioDataPromise>
MediaDecoderReader::RequestAudioData()
{
nsRefPtr<AudioDataPromise> p = mBaseAudioPromise.Ensure(__func__);
while (AudioQueue().GetSize() == 0 &&
!AudioQueue().IsFinished()) {
if (!DecodeAudioData()) {
AudioQueue().Finish();
break;
}
// AudioQueue size is still zero, post a task to try again. Don't spin
// waiting in this while loop since it somehow prevents audio EOS from
// coming in gstreamer 1.x when there is still video buffer waiting to be
// consumed. (|mVideoSinkBufferCount| > 0)
if (AudioQueue().GetSize() == 0 && mTaskQueue) {
RefPtr<nsIRunnable> task(new ReRequestAudioTask(this));
mTaskQueue->Dispatch(task.forget());
return p;
}
}
if (AudioQueue().GetSize() > 0) {
nsRefPtr<AudioData> a = AudioQueue().PopFront();
if (mAudioDiscontinuity) {
a->mDiscontinuity = true;
mAudioDiscontinuity = false;
}
mBaseAudioPromise.Resolve(a, __func__);
} else if (AudioQueue().IsFinished()) {
mBaseAudioPromise.Reject(mHitAudioDecodeError ? DECODE_ERROR : END_OF_STREAM, __func__);
mHitAudioDecodeError = false;
} else {
MOZ_ASSERT(false, "Dropping this promise on the floor");
}
return p;
}
void
MediaDecoderReader::BreakCycles()
{
// Nothing left to do here these days. We keep this method around so that, if
// we need it, we don't have to make all of the subclass implementations call
// the superclass method again.
}
nsRefPtr<ShutdownPromise>
MediaDecoderReader::Shutdown()
{
MOZ_ASSERT(OnTaskQueue());
mShutdown = true;
mBaseAudioPromise.RejectIfExists(END_OF_STREAM, __func__);
mBaseVideoPromise.RejectIfExists(END_OF_STREAM, __func__);
mThrottledNotify.DisconnectIfExists();
ReleaseMediaResources();
mDuration.DisconnectIfConnected();
mBuffered.DisconnectAll();
// Shut down the watch manager before shutting down our task queue.
mWatchManager.Shutdown();
nsRefPtr<ShutdownPromise> p;
// Spin down the task queue if necessary. We wait until BreakCycles to null
// out mTaskQueue, since otherwise any remaining tasks could crash when they
// invoke OnTaskQueue().
if (mTaskQueue && !mTaskQueueIsBorrowed) {
// If we own our task queue, shutdown ends when the task queue is done.
p = mTaskQueue->BeginShutdown();
} else {
// If we don't own our task queue, we resolve immediately (though
// asynchronously).
p = ShutdownPromise::CreateAndResolve(true, __func__);
}
mTimer = nullptr;
mDecoder = nullptr;
return p;
}
} // namespace mozilla
#undef DECODER_LOG
#undef DECODER_WARN
#undef DECODER_WARN_HELPER