1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/encoder/VorbisTrackEncoder.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,54 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.7 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef VorbisTrackEncoder_h_
1.10 +#define VorbisTrackEncoder_h_
1.11 +
1.12 +#include "TrackEncoder.h"
1.13 +#include "nsCOMPtr.h"
1.14 +#include <vorbis/codec.h>
1.15 +
1.16 +namespace mozilla {
1.17 +
1.18 +class VorbisTrackEncoder : public AudioTrackEncoder
1.19 +{
1.20 +public:
1.21 + VorbisTrackEncoder();
1.22 + virtual ~VorbisTrackEncoder();
1.23 +
1.24 + already_AddRefed<TrackMetadataBase> GetMetadata() MOZ_FINAL MOZ_OVERRIDE;
1.25 +
1.26 + nsresult GetEncodedTrack(EncodedFrameContainer& aData) MOZ_FINAL MOZ_OVERRIDE;
1.27 +
1.28 +protected:
1.29 + /**
1.30 + * http://xiph.org/vorbis/doc/libvorbis/vorbis_analysis_buffer.html
1.31 + * We use 1024 samples for the write buffer; libvorbis will construct packets
1.32 + * with the appropriate duration for the encoding mode internally.
1.33 + */
1.34 + int GetPacketDuration() MOZ_FINAL MOZ_OVERRIDE {
1.35 + return 1024;
1.36 + }
1.37 +
1.38 + nsresult Init(int aChannels, int aSamplingRate) MOZ_FINAL MOZ_OVERRIDE;
1.39 +
1.40 +private:
1.41 + // Write Xiph-style lacing to aOutput.
1.42 + void WriteLacing(nsTArray<uint8_t> *aOutput, int32_t aLacing);
1.43 +
1.44 + // Get the encoded data from vorbis encoder and append into aData.
1.45 + void GetEncodedFrames(EncodedFrameContainer& aData);
1.46 +
1.47 + // vorbis codec members
1.48 + // Struct that stores all the static vorbis bitstream settings.
1.49 + vorbis_info mVorbisInfo;
1.50 + // Central working state for the PCM->packet encoder.
1.51 + vorbis_dsp_state mVorbisDsp;
1.52 + // Local working space for PCM->packet encode.
1.53 + vorbis_block mVorbisBlock;
1.54 +};
1.55 +
1.56 +}
1.57 +#endif
