content/media/webm/EbmlComposer.h@44a2da4a2ab2 (annotated)
content/media/webm/EbmlComposer.h
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 4 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #ifndef EbmlComposer_h_ |
| michael@0 | 7 | #define EbmlComposer_h_ |
| michael@0 | 8 | #include "nsTArray.h" |
| michael@0 | 9 | #include "ContainerWriter.h" |
| michael@0 | 10 | |
| michael@0 | 11 | namespace mozilla { |
| michael@0 | 12 | |
| michael@0 | 13 | /* |
| michael@0 | 14 | * A WebM muxer helper for package the valid WebM format. |
| michael@0 | 15 | */ |
| michael@0 | 16 | class EbmlComposer { |
| michael@0 | 17 | public: |
| michael@0 | 18 | EbmlComposer(); |
| michael@0 | 19 | /* |
| michael@0 | 20 | * Assign the parameter which header required. |
| michael@0 | 21 | */ |
| michael@0 | 22 | void SetVideoConfig(uint32_t aWidth, uint32_t aHeight, uint32_t aDisplayWidth, |
| michael@0 | 23 | uint32_t aDisplayHeight, float aFrameRate); |
| michael@0 | 24 | |
| michael@0 | 25 | void SetAudioConfig(uint32_t aSampleFreq, uint32_t aChannels, |
| michael@0 | 26 | uint32_t bitDepth); |
| michael@0 | 27 | /* |
| michael@0 | 28 | * Set the CodecPrivateData for writing in header. |
| michael@0 | 29 | */ |
| michael@0 | 30 | void SetAudioCodecPrivateData(nsTArray<uint8_t>& aBufs) |
| michael@0 | 31 | { |
| michael@0 | 32 | mCodecPrivateData.AppendElements(aBufs); |
| michael@0 | 33 | } |
| michael@0 | 34 | /* |
| michael@0 | 35 | * Generate the whole WebM header and output to mBuff. |
| michael@0 | 36 | */ |
| michael@0 | 37 | void GenerateHeader(); |
| michael@0 | 38 | /* |
| michael@0 | 39 | * Insert media encoded buffer into muxer and it would be package |
| michael@0 | 40 | * into SimpleBlock. If no cluster is opened, new cluster will start for writing. |
| michael@0 | 41 | */ |
| michael@0 | 42 | void WriteSimpleBlock(EncodedFrame* aFrame); |
| michael@0 | 43 | /* |
| michael@0 | 44 | * Get valid cluster data. |
| michael@0 | 45 | */ |
| michael@0 | 46 | void ExtractBuffer(nsTArray<nsTArray<uint8_t> >* aDestBufs, |
| michael@0 | 47 | uint32_t aFlag = 0); |
| michael@0 | 48 | private: |
| michael@0 | 49 | // Move the metadata data to mClusterCanFlushBuffs. |
| michael@0 | 50 | void FinishMetadata(); |
| michael@0 | 51 | // Close current cluster and move data to mClusterCanFlushBuffs. |
| michael@0 | 52 | void FinishCluster(); |
| michael@0 | 53 | // The temporary storage for cluster data. |
| michael@0 | 54 | nsTArray<nsTArray<uint8_t> > mClusterBuffs; |
| michael@0 | 55 | // The storage which contain valid cluster data. |
| michael@0 | 56 | nsTArray<nsTArray<uint8_t> > mClusterCanFlushBuffs; |
| michael@0 | 57 | |
| michael@0 | 58 | // Indicate the data types in mClusterBuffs. |
| michael@0 | 59 | enum { |
| michael@0 | 60 | FLUSH_NONE = 0, |
| michael@0 | 61 | FLUSH_METADATA = 1 << 0, |
| michael@0 | 62 | FLUSH_CLUSTER = 1 << 1 |
| michael@0 | 63 | }; |
| michael@0 | 64 | uint32_t mFlushState; |
| michael@0 | 65 | // Indicate the cluster header index in mClusterBuffs. |
| michael@0 | 66 | uint32_t mClusterHeaderIndex; |
| michael@0 | 67 | // The cluster length position. |
| michael@0 | 68 | uint64_t mClusterLengthLoc; |
| michael@0 | 69 | // Audio codec specific header data. |
| michael@0 | 70 | nsTArray<uint8_t> mCodecPrivateData; |
| michael@0 | 71 | |
| michael@0 | 72 | // The timecode of the cluster. |
| michael@0 | 73 | uint64_t mClusterTimecode; |
| michael@0 | 74 | |
| michael@0 | 75 | // Video configuration |
| michael@0 | 76 | int mWidth; |
| michael@0 | 77 | int mHeight; |
| michael@0 | 78 | int mDisplayWidth; |
| michael@0 | 79 | int mDisplayHeight; |
| michael@0 | 80 | float mFrameRate; |
| michael@0 | 81 | // Audio configuration |
| michael@0 | 82 | float mSampleFreq; |
| michael@0 | 83 | int mBitDepth; |
| michael@0 | 84 | int mChannels; |
| michael@0 | 85 | }; |
| michael@0 | 86 | |
| michael@0 | 87 | } |
| michael@0 | 88 | #endif |
