mkv_decoder.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 *
 */

#include "common/scummsys.h"    // for USE_VPX

#ifdef USE_VPX

#ifndef VIDEO_MKV_DECODER_H
#define VIDEO_MKV_DECODER_H

#include "common/queue.h"
#include "video/video_decoder.h"
#include "audio/mixer.h"
#include "graphics/surface.h"

#ifdef USE_TREMOR
#include <tremor/ivorbiscodec.h>
#else
#include <vorbis/codec.h>
#endif

#include <vpx/vpx_decoder.h>
#include <vpx/vp8dx.h>


namespace Common {
class SeekableReadStream;
}

namespace Audio {
class AudioStream;
class QueuingAudioStream;
}

namespace mkvparser {
class MkvReader;
class Cluster;
class Track;
class Tracks;
class Block;
class BlockEntry;
class Segment;
}

namespace Video {

class MkvReader;

class MKVDecoder : public VideoDecoder {
public:
    MKVDecoder();
    virtual ~MKVDecoder();

    bool loadStream(Common::SeekableReadStream *stream);
    void close();

protected:
    void readNextPacket();

private:
    class VPXVideoTrack : public VideoTrack {
    public:
        VPXVideoTrack(const mkvparser::Track *const pTrack);
        ~VPXVideoTrack();

        bool endOfTrack() const;
        uint16 getWidth() const { return _width; }
        uint16 getHeight() const { return _height; }
        Graphics::PixelFormat getPixelFormat() const { return _pixelFormat; }
        bool setOutputPixelFormat(const Graphics::PixelFormat &format) {
            if (format.bytesPerPixel != 2 && format.bytesPerPixel != 4)
                return false;
            _pixelFormat = format;
            return true;
        }

        int getCurFrame() const { return _curFrame; }
        uint32 getNextFrameStartTime() const { return (uint32)(_nextFrameStartTime * 1000); }
        const Graphics::Surface *decodeNextFrame();
        bool decodeFrame(byte *frame, long size);
        void setEndOfVideo() { _endOfVideo = true; }

    private:
        int _curFrame;
        bool _endOfVideo;
        double _nextFrameStartTime;

        uint16 _width;
        uint16 _height;
        Graphics::PixelFormat _pixelFormat;

        Graphics::Surface _surface;
        Common::Queue<Graphics::Surface> _displayQueue;

        vpx_codec_ctx_t *_codec = nullptr;
    };

    class VorbisAudioTrack : public AudioTrack {
    public:
        VorbisAudioTrack(const mkvparser::Track *const pTrack);
        ~VorbisAudioTrack();

        bool decodeSamples(byte *frame, long size);
        bool hasAudio() const;
        bool needsAudio() const;
        bool synthesizePacket(byte *frame, long size);
        void setEndOfAudio() { _endOfAudio = true; }

    protected:
        Audio::AudioStream *getAudioStream() const;

    private:
        Audio::QueuingAudioStream *_audStream;

        vorbis_block _vorbisBlock;
        vorbis_dsp_state _vorbisDSP;

        vorbis_info _vorbisInfo;
        bool _endOfAudio;

        ogg_packet oggPacket;
    };

    bool queueAudio(long size);

    Common::SeekableReadStream *_fileStream;

    bool _hasVideo, _hasAudio;

    VPXVideoTrack *_videoTrack = nullptr;
    VorbisAudioTrack *_audioTrack = nullptr;

    mkvparser::MkvReader *_reader = nullptr;

    const mkvparser::Cluster *_cluster = nullptr;
    const mkvparser::Tracks *_pTracks = nullptr;
    const mkvparser::BlockEntry *_pBlockEntry = nullptr;
    mkvparser::Segment *_pSegment = nullptr;

    byte *_frame = nullptr;
    int _frameCounter = 0;

    int _vTrack = -1;
    int _aTrack = -1;

    const mkvparser::Block *_pBlock;
    long long _trackNum;
    int _frameCount;
};

} // End of namespace Video

#endif

#endif