зеркало из https://github.com/mozilla/gecko-dev.git
89 строки
2.4 KiB
C++
89 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef EbmlComposer_h_
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#define EbmlComposer_h_
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#include "nsTArray.h"
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#include "ContainerWriter.h"
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namespace mozilla {
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/*
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* A WebM muxer helper for package the valid WebM format.
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*/
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class EbmlComposer {
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public:
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EbmlComposer();
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/*
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* Assign the parameter which header required.
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*/
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void SetVideoConfig(uint32_t aWidth, uint32_t aHeight, uint32_t aDisplayWidth,
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uint32_t aDisplayHeight, float aFrameRate);
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void SetAudioConfig(uint32_t aSampleFreq, uint32_t aChannels,
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uint32_t bitDepth);
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/*
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* Set the CodecPrivateData for writing in header.
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*/
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void SetAudioCodecPrivateData(nsTArray<uint8_t>& aBufs)
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{
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mCodecPrivateData.AppendElements(aBufs);
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}
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/*
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* Generate the whole WebM header and output to mBuff.
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*/
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void GenerateHeader();
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/*
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* Insert media encoded buffer into muxer and it would be package
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* into SimpleBlock. If no cluster is opened, new cluster will start for writing.
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*/
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void WriteSimpleBlock(EncodedFrame* aFrame);
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/*
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* Get valid cluster data.
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*/
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void ExtractBuffer(nsTArray<nsTArray<uint8_t> >* aDestBufs,
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uint32_t aFlag = 0);
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private:
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// Move the metadata data to mClusterCanFlushBuffs.
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void FinishMetadata();
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// Close current cluster and move data to mClusterCanFlushBuffs.
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void FinishCluster();
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// The temporary storage for cluster data.
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nsTArray<nsTArray<uint8_t> > mClusterBuffs;
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// The storage which contain valid cluster data.
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nsTArray<nsTArray<uint8_t> > mClusterCanFlushBuffs;
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// Indicate the data types in mClusterBuffs.
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enum {
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FLUSH_NONE = 0,
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FLUSH_METADATA = 1 << 0,
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FLUSH_CLUSTER = 1 << 1
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};
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uint32_t mFlushState;
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// Indicate the cluster header index in mClusterBuffs.
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uint32_t mClusterHeaderIndex;
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// The cluster length position.
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uint64_t mClusterLengthLoc;
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// Audio codec specific header data.
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nsTArray<uint8_t> mCodecPrivateData;
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// The timecode of the cluster.
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uint64_t mClusterTimecode;
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// Video configuration
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int mWidth;
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int mHeight;
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int mDisplayWidth;
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int mDisplayHeight;
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float mFrameRate;
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// Audio configuration
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float mSampleFreq;
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int mBitDepth;
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int mChannels;
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};
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}
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#endif
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