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61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
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/* -*- 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 OpusTrackEncoder_h_
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#define OpusTrackEncoder_h_
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#include "TrackEncoder.h"
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#include "nsCOMPtr.h"
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struct OpusEncoder;
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namespace mozilla {
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class OpusTrackEncoder : public AudioTrackEncoder
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{
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public:
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OpusTrackEncoder();
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virtual ~OpusTrackEncoder();
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nsresult GetHeader(nsTArray<uint8_t>* aOutput) MOZ_OVERRIDE;
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nsresult GetEncodedTrack(nsTArray<uint8_t>* aOutput, int &aOutputDuration) MOZ_OVERRIDE;
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protected:
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int GetPacketDuration() MOZ_OVERRIDE;
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nsresult Init(int aChannels, int aSamplingRate) MOZ_OVERRIDE;
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private:
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enum {
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ID_HEADER,
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COMMENT_HEADER,
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DATA
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} mEncoderState;
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/**
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* The Opus encoder from libopus.
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*/
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OpusEncoder* mEncoder;
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/**
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* A local segment queue which stores the raw segments. Opus encoder only
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* takes GetPacketDuration() samples from mSourceSegment in every encoding
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* cycle, thus it needs to store the raw track data.
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*/
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nsAutoPtr<AudioSegment> mSourceSegment;
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/**
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* Total samples of delay added by codec, can be queried by the encoder. From
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* the perspective of decoding, real data begins this many samples late, so
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* the encoder needs to append this many null samples to the end of stream,
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* in order to align the time of input and output.
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*/
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int mLookahead;
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};
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}
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#endif
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