AudioDecoderFfmpeg.h

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// AudioDecoderFfmpeg.h: Audio decoding using the FFMPEG library.
// 
//   Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012
//   Free Software Foundation, Inc.
// 
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

#ifndef GNASH_AUDIODECODERFFMPEG_H
#define GNASH_AUDIODECODERFFMPEG_H

#include "ffmpegHeaders.h"

#include "log.h"
#include "AudioDecoder.h" // for inheritance
#include "AudioResamplerFfmpeg.h" // for composition

// Forward declarations
namespace gnash {
    namespace media {
        class SoundInfo;
        class AudioInfo;
    }
}

namespace gnash {
namespace media {
namespace ffmpeg {

class AudioDecoderFfmpeg : public AudioDecoder {
        
public:
        AudioDecoderFfmpeg(const AudioInfo& info);

        AudioDecoderFfmpeg(SoundInfo& info);
        ~AudioDecoderFfmpeg();

    // See dox in AudioDecoder.h
        std::uint8_t* decode(const std::uint8_t* input,
            std::uint32_t inputSize, std::uint32_t& outputSize,
            std::uint32_t& decodedBytes);

        std::uint8_t* decode(const EncodedAudioFrame& af,
            std::uint32_t& outputSize);

private:

        void setup(const AudioInfo& info);
        void setup(SoundInfo& info);

        std::uint8_t* decodeFrame(const std::uint8_t* input,
            std::uint32_t inputSize, std::uint32_t& outputSize);

        AVCodec* _audioCodec;
        AVCodecContext* _audioCodecCtx;
        AVCodecParserContext* _parser;

        // Use for resampling audio
        AudioResamplerFfmpeg _resampler;

    bool _needsParsing;

    //
    int parseInput(const std::uint8_t* input, std::uint32_t inputSize,
            std::uint8_t const ** outFrame, int* outFrameSize);
};
        
} // gnash.media.ffmpeg namespace 
} // gnash.media namespace 
} // gnash namespace

#endif