mirror of
https://github.com/mozilla/gecko-dev.git
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269 lines
8.3 KiB
C++
269 lines
8.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#if !defined(MP4Reader_h_)
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#define MP4Reader_h_
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#include "MediaDecoderReader.h"
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#include "nsAutoPtr.h"
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#include "PlatformDecoderModule.h"
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#include "mp4_demuxer/mp4_demuxer.h"
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#include "MediaTaskQueue.h"
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#include <deque>
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#include "mozilla/Monitor.h"
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namespace mozilla {
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namespace dom {
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class TimeRanges;
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}
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typedef std::deque<mp4_demuxer::MP4Sample*> MP4SampleQueue;
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class MP4Stream;
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class MP4Reader MOZ_FINAL : public MediaDecoderReader
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{
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typedef mp4_demuxer::TrackType TrackType;
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public:
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explicit MP4Reader(AbstractMediaDecoder* aDecoder);
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virtual ~MP4Reader();
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virtual nsresult Init(MediaDecoderReader* aCloneDonor) MOZ_OVERRIDE;
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virtual size_t SizeOfVideoQueueInFrames() MOZ_OVERRIDE;
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virtual size_t SizeOfAudioQueueInFrames() MOZ_OVERRIDE;
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virtual nsRefPtr<VideoDataPromise>
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RequestVideoData(bool aSkipToNextKeyframe, int64_t aTimeThreshold) MOZ_OVERRIDE;
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virtual nsRefPtr<AudioDataPromise> RequestAudioData() MOZ_OVERRIDE;
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virtual bool HasAudio() MOZ_OVERRIDE;
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virtual bool HasVideo() MOZ_OVERRIDE;
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// PreReadMetadata() is called by MediaDecoderStateMachine::DecodeMetadata()
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// before checking hardware resource. In Gonk, it requests hardware codec so
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// MediaDecoderStateMachine could go to DORMANT state if the hardware codec is
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// not available.
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virtual void PreReadMetadata() MOZ_OVERRIDE;
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virtual nsresult ReadMetadata(MediaInfo* aInfo,
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MetadataTags** aTags) MOZ_OVERRIDE;
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virtual void ReadUpdatedMetadata(MediaInfo* aInfo) MOZ_OVERRIDE;
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virtual nsRefPtr<SeekPromise>
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Seek(int64_t aTime,
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int64_t aStartTime,
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int64_t aEndTime,
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int64_t aCurrentTime) MOZ_OVERRIDE;
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virtual bool IsMediaSeekable() MOZ_OVERRIDE;
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virtual int64_t GetEvictionOffset(double aTime) MOZ_OVERRIDE;
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virtual nsresult GetBuffered(dom::TimeRanges* aBuffered) MOZ_OVERRIDE;
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// For Media Resource Management
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virtual void SetIdle() MOZ_OVERRIDE;
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virtual bool IsWaitingMediaResources() MOZ_OVERRIDE;
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virtual bool IsDormantNeeded() MOZ_OVERRIDE;
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virtual void ReleaseMediaResources() MOZ_OVERRIDE;
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virtual void SetSharedDecoderManager(SharedDecoderManager* aManager)
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MOZ_OVERRIDE;
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virtual nsresult ResetDecode() MOZ_OVERRIDE;
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virtual nsRefPtr<ShutdownPromise> Shutdown() MOZ_OVERRIDE;
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private:
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void ReturnOutput(MediaData* aData, TrackType aTrack);
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// Sends input to decoder for aTrack, and output to the state machine,
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// if necessary.
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void Update(TrackType aTrack);
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// Enqueues a task to call Update(aTrack) on the decoder task queue.
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// Lock for corresponding track must be held.
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void ScheduleUpdate(TrackType aTrack);
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void ExtractCryptoInitData(nsTArray<uint8_t>& aInitData);
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// Initializes mLayersBackendType if possible.
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void InitLayersBackendType();
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// Blocks until the demuxer produces an sample of specified type.
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// Returns nullptr on error on EOS. Caller must delete sample.
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mp4_demuxer::MP4Sample* PopSample(mp4_demuxer::TrackType aTrack);
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bool SkipVideoDemuxToNextKeyFrame(int64_t aTimeThreshold, uint32_t& parsed);
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// DecoderCallback proxies the MediaDataDecoderCallback calls to these
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// functions.
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void Output(mp4_demuxer::TrackType aType, MediaData* aSample);
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void InputExhausted(mp4_demuxer::TrackType aTrack);
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void Error(mp4_demuxer::TrackType aTrack);
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void Flush(mp4_demuxer::TrackType aTrack);
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void DrainComplete(mp4_demuxer::TrackType aTrack);
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void UpdateIndex();
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bool IsSupportedAudioMimeType(const char* aMimeType);
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bool IsSupportedVideoMimeType(const char* aMimeType);
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void NotifyResourcesStatusChanged();
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void RequestCodecResource();
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bool IsWaitingOnCodecResource();
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virtual bool IsWaitingOnCDMResource() MOZ_OVERRIDE;
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size_t SizeOfQueue(TrackType aTrack);
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nsAutoPtr<mp4_demuxer::MP4Demuxer> mDemuxer;
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nsRefPtr<PlatformDecoderModule> mPlatform;
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class DecoderCallback : public MediaDataDecoderCallback {
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public:
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DecoderCallback(MP4Reader* aReader,
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mp4_demuxer::TrackType aType)
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: mReader(aReader)
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, mType(aType)
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{
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}
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virtual void Output(MediaData* aSample) MOZ_OVERRIDE {
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mReader->Output(mType, aSample);
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}
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virtual void InputExhausted() MOZ_OVERRIDE {
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mReader->InputExhausted(mType);
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}
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virtual void Error() MOZ_OVERRIDE {
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mReader->Error(mType);
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}
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virtual void DrainComplete() MOZ_OVERRIDE {
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mReader->DrainComplete(mType);
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}
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virtual void NotifyResourcesStatusChanged() MOZ_OVERRIDE {
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mReader->NotifyResourcesStatusChanged();
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}
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virtual void ReleaseMediaResources() MOZ_OVERRIDE {
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mReader->ReleaseMediaResources();
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}
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private:
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MP4Reader* mReader;
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mp4_demuxer::TrackType mType;
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};
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struct DecoderData {
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DecoderData(MediaData::Type aType,
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uint32_t aDecodeAhead)
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: mType(aType)
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, mMonitor(aType == MediaData::AUDIO_DATA ? "MP4 audio decoder data"
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: "MP4 video decoder data")
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, mNumSamplesInput(0)
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, mNumSamplesOutput(0)
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, mDecodeAhead(aDecodeAhead)
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, mActive(false)
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, mInputExhausted(false)
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, mError(false)
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, mIsFlushing(false)
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, mUpdateScheduled(false)
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, mDemuxEOS(false)
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, mDrainComplete(false)
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, mDiscontinuity(false)
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{
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}
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// The platform decoder.
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nsRefPtr<MediaDataDecoder> mDecoder;
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// TaskQueue on which decoder can choose to decode.
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// Only non-null up until the decoder is created.
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nsRefPtr<MediaTaskQueue> mTaskQueue;
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// Callback that receives output and error notifications from the decoder.
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nsAutoPtr<DecoderCallback> mCallback;
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// Decoded samples returned my mDecoder awaiting being returned to
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// state machine upon request.
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nsTArray<nsRefPtr<MediaData> > mOutput;
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// Disambiguate Audio vs Video.
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MediaData::Type mType;
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// These get overriden in the templated concrete class.
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virtual bool HasPromise() = 0;
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virtual void RejectPromise(MediaDecoderReader::NotDecodedReason aReason,
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const char* aMethodName) = 0;
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// Monitor that protects all non-threadsafe state; the primitives
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// that follow.
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Monitor mMonitor;
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uint64_t mNumSamplesInput;
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uint64_t mNumSamplesOutput;
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uint32_t mDecodeAhead;
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// Whether this stream exists in the media.
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bool mActive;
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bool mInputExhausted;
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bool mError;
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bool mIsFlushing;
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bool mUpdateScheduled;
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bool mDemuxEOS;
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bool mDrainComplete;
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bool mDiscontinuity;
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};
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template<typename PromiseType>
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struct DecoderDataWithPromise : public DecoderData {
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DecoderDataWithPromise(MediaData::Type aType, uint32_t aDecodeAhead) :
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DecoderData(aType, aDecodeAhead)
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{
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mPromise.SetMonitor(&mMonitor);
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}
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MediaPromiseHolder<PromiseType> mPromise;
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bool HasPromise() MOZ_OVERRIDE { return !mPromise.IsEmpty(); }
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void RejectPromise(MediaDecoderReader::NotDecodedReason aReason,
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const char* aMethodName) MOZ_OVERRIDE
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{
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mPromise.Reject(aReason, aMethodName);
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}
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};
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DecoderDataWithPromise<AudioDataPromise> mAudio;
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DecoderDataWithPromise<VideoDataPromise> mVideo;
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// Queued samples extracted by the demuxer, but not yet sent to the platform
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// decoder.
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nsAutoPtr<mp4_demuxer::MP4Sample> mQueuedVideoSample;
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// Returns true when the decoder for this track needs input.
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// aDecoder.mMonitor must be locked.
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bool NeedInput(DecoderData& aDecoder);
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// The last number of decoded output frames that we've reported to
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// MediaDecoder::NotifyDecoded(). We diff the number of output video
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// frames every time that DecodeVideoData() is called, and report the
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// delta there.
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uint64_t mLastReportedNumDecodedFrames;
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DecoderData& GetDecoderData(mp4_demuxer::TrackType aTrack);
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layers::LayersBackend mLayersBackendType;
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nsTArray<nsTArray<uint8_t>> mInitDataEncountered;
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// True if we've read the streams' metadata.
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bool mDemuxerInitialized;
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// Synchronized by decoder monitor.
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bool mIsEncrypted;
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bool mIndexReady;
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Monitor mIndexMonitor;
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nsRefPtr<SharedDecoderManager> mSharedDecoderManager;
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};
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} // namespace mozilla
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#endif
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