зеркало из https://github.com/mozilla/gecko-dev.git
82 строки
2.5 KiB
C++
82 строки
2.5 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() = default;
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/*
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* Assign the parameters which header requires. These can be called multiple
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* times to change paramter values until GenerateHeader() is called, when this
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* becomes illegal to call again.
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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);
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void SetAudioConfig(uint32_t aSampleFreq, uint32_t aChannels);
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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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mCodecPrivateData.AppendElements(aBufs);
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}
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/*
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* Generate the whole WebM header with the configured tracks, and make
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* available to ExtractBuffer. Must only be called once.
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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
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* writing. Frames passed to this function should already have any codec delay
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* applied.
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*/
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nsresult 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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// True once we have written the first cluster header. We cannot serialize any
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// P-frames until this is true, since we start a new cluster every I-frame.
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bool mHasWrittenCluster = false;
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// The timecode of the cluster.
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uint64_t mCurrentClusterTimecode = 0;
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// Written data to be flushed out by ExtractBuffer().
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nsTArray<nsTArray<uint8_t>> mBuffer;
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// True when Metadata has been serialized into mBuffer.
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bool mMetadataFinished = false;
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// Video configuration
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int mWidth = 0;
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int mHeight = 0;
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int mDisplayWidth = 0;
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int mDisplayHeight = 0;
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bool mHasVideo = false;
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// Audio configuration
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float mSampleFreq = 0;
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int mChannels = 0;
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bool mHasAudio = false;
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// Audio codec specific header data.
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nsTArray<uint8_t> mCodecPrivateData;
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};
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} // namespace mozilla
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#endif
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