smush_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/>.
 *
 */
 
#ifndef GRIM_SMUSH_DECODER_H
#define GRIM_SMUSH_DECODER_H
 
#include "audio/audiostream.h"
 
#include "video/video_decoder.h"
 
#include "graphics/surface.h"
 
namespace Audio {
class QueuingAudioStream;
}
 
namespace Grim {
 
class Codec48Decoder;
class Blocky8;
class Blocky16;
 
class SmushDecoder : public Video::VideoDecoder {
public:
    SmushDecoder();
    ~SmushDecoder();
 
    int getX() const { return _videoTrack->_x; }
    int getY() const { return _videoTrack->_y; }
    void setLooping(bool l);
    bool isRewindable() const override { return true; }
    bool isSeekable() const override { return true; }
    bool rewind() override;
    bool seekIntern(const Audio::Timestamp &time) override;
    bool loadStream(Common::SeekableReadStream *stream) override;
 
protected:
    bool readHeader();
    void handleFrameDemo();
    void handleFrame();
    bool handleFramesHeader();
    void handleFRME(Common::SeekableReadStream *stream, uint32 size);
    void init();
    void close() override;
    const Graphics::Surface *decodeNextFrame() override;
    class SmushVideoTrack : public FixedRateVideoTrack {
    public:
        SmushVideoTrack(int width, int height, int fps, int numFrames, bool is16Bit);
        ~SmushVideoTrack();
 
        uint16 getWidth() const override { return _width; }
        uint16 getHeight() const override { return _height; }
        Graphics::PixelFormat getPixelFormat() const override { return _format; }
        int getCurFrame() const override { return _curFrame; }
        void setCurFrame(int frame) { _curFrame = frame; }
        int getFrameCount() const override { return _nbframes; }
        Common::Rational getFrameRate() const override { return _frameRate; }
        void setMsPerFrame(int ms);
 
        void finishFrame();
        bool isSeekable() const override { return true; }
        bool seek(const Audio::Timestamp &time) override { return true; }
        void setFrameStart(int frame);
 
        void handleBlocky16(Common::SeekableReadStream *stream, uint32 size);
        void handleFrameObject(Common::SeekableReadStream *stream, uint32 size);
        void handleDeltaPalette(Common::SeekableReadStream *stream, int32 size);
        void init();
        Graphics::Surface *decodeNextFrame() override;
        const byte *getPalette() const override { _dirtyPalette = false; return _palette; }
        bool hasDirtyPalette() const override { return _dirtyPalette; }
 
        byte *getPal() { _dirtyPalette = true; return _palette; }
        int _x, _y;
    private:
        void convertDemoFrame();
        bool _is16Bit;
        int32 _curFrame;
        byte _palette[0x300];
        int16 _deltaPal[0x300];
        mutable bool _dirtyPalette;
        int _width, _height;
        Graphics::Surface _surface;
        Graphics::PixelFormat _format;
        Common::Rational _frameRate;
        Blocky8 *_blocky8;
        Blocky16 *_blocky16;
        Codec48Decoder *_codec48;
        int32 _nbframes;
        int _frameStart;
    };
 
    class SmushAudioTrack : public AudioTrack {
    public:
        SmushAudioTrack(Audio::Mixer::SoundType soundType, bool isVima, int freq = 22050, int channels = -1);
        ~SmushAudioTrack();
 
        Audio::AudioStream *getAudioStream() const override { return _queueStream; }
        bool isSeekable() const override { return true; }
        bool seek(const Audio::Timestamp &time) override;
        void skipSamples(int samples);
        inline int getRate() const { return _queueStream->getRate(); }
 
        void handleVIMA(Common::SeekableReadStream *stream, uint32 size);
        void handleIACT(Common::SeekableReadStream *stream, int32 size);
        void init();
    private:
        bool _isVima;
        byte _IACToutput[4096];
        int32 _IACTpos;
        int _channels;
        int _freq;
        Audio::QueuingAudioStream *_queueStream;
    };
private:
    void initFrames();
 
    SmushAudioTrack *_audioTrack;
    SmushVideoTrack *_videoTrack;
 
    Common::SeekableReadStream *_file;
 
    uint32 _startPos;
 
    bool _videoPause;
    bool _videoLooping;
    struct Frame {
        int frame;
        int pos;
        bool keyframe;
    };
    Frame *_frames;
    static bool _demo;
};
 
} // end of namespace Grim
 
#endif