content/media/encoder/VorbisTrackEncoder.h@44a2da4a2ab2 (annotated)
content/media/encoder/VorbisTrackEncoder.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 VorbisTrackEncoder_h_ |
| michael@0 | 7 | #define VorbisTrackEncoder_h_ |
| michael@0 | 8 | |
| michael@0 | 9 | #include "TrackEncoder.h" |
| michael@0 | 10 | #include "nsCOMPtr.h" |
| michael@0 | 11 | #include <vorbis/codec.h> |
| michael@0 | 12 | |
| michael@0 | 13 | namespace mozilla { |
| michael@0 | 14 | |
| michael@0 | 15 | class VorbisTrackEncoder : public AudioTrackEncoder |
| michael@0 | 16 | { |
| michael@0 | 17 | public: |
| michael@0 | 18 | VorbisTrackEncoder(); |
| michael@0 | 19 | virtual ~VorbisTrackEncoder(); |
| michael@0 | 20 | |
| michael@0 | 21 | already_AddRefed<TrackMetadataBase> GetMetadata() MOZ_FINAL MOZ_OVERRIDE; |
| michael@0 | 22 | |
| michael@0 | 23 | nsresult GetEncodedTrack(EncodedFrameContainer& aData) MOZ_FINAL MOZ_OVERRIDE; |
| michael@0 | 24 | |
| michael@0 | 25 | protected: |
| michael@0 | 26 | /** |
| michael@0 | 27 | * http://xiph.org/vorbis/doc/libvorbis/vorbis_analysis_buffer.html |
| michael@0 | 28 | * We use 1024 samples for the write buffer; libvorbis will construct packets |
| michael@0 | 29 | * with the appropriate duration for the encoding mode internally. |
| michael@0 | 30 | */ |
| michael@0 | 31 | int GetPacketDuration() MOZ_FINAL MOZ_OVERRIDE { |
| michael@0 | 32 | return 1024; |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | nsresult Init(int aChannels, int aSamplingRate) MOZ_FINAL MOZ_OVERRIDE; |
| michael@0 | 36 | |
| michael@0 | 37 | private: |
| michael@0 | 38 | // Write Xiph-style lacing to aOutput. |
| michael@0 | 39 | void WriteLacing(nsTArray<uint8_t> *aOutput, int32_t aLacing); |
| michael@0 | 40 | |
| michael@0 | 41 | // Get the encoded data from vorbis encoder and append into aData. |
| michael@0 | 42 | void GetEncodedFrames(EncodedFrameContainer& aData); |
| michael@0 | 43 | |
| michael@0 | 44 | // vorbis codec members |
| michael@0 | 45 | // Struct that stores all the static vorbis bitstream settings. |
| michael@0 | 46 | vorbis_info mVorbisInfo; |
| michael@0 | 47 | // Central working state for the PCM->packet encoder. |
| michael@0 | 48 | vorbis_dsp_state mVorbisDsp; |
| michael@0 | 49 | // Local working space for PCM->packet encode. |
| michael@0 | 50 | vorbis_block mVorbisBlock; |
| michael@0 | 51 | }; |
| michael@0 | 52 | |
| michael@0 | 53 | } |
| michael@0 | 54 | #endif |
