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/* 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 2
* 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 Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#ifndef VIDEO_DXA_DECODER_H
#define VIDEO_DXA_DECODER_H
#include "common/rational.h"
#include "graphics/pixelformat.h"
#include "video/video_decoder.h"
namespace Common {
class SeekableReadStream;
}
namespace Video {
/**
* Decoder for DXA videos.
*
* Video decoder used in engines:
* - agos
* - sword1
* - sword2
*/
class DXADecoder : public AdvancedVideoDecoder {
public:
DXADecoder();
virtual ~DXADecoder();
bool loadStream(Common::SeekableReadStream *stream);
protected:
/**
* Read the sound data out of the given DXA stream
*/
virtual void readSoundData(Common::SeekableReadStream *stream);
private:
class DXAVideoTrack : public FixedRateVideoTrack {
public:
DXAVideoTrack(Common::SeekableReadStream *stream);
~DXAVideoTrack();
bool isRewindable() const { return true; }
bool rewind();
uint16 getWidth() const { return _width; }
uint16 getHeight() const { return _height; }
Graphics::PixelFormat getPixelFormat() const;
int getCurFrame() const { return _curFrame; }
int getFrameCount() const { return _frameCount; }
const Graphics::Surface *decodeNextFrame();
const byte *getPalette() const { _dirtyPalette = false; return _palette; }
bool hasDirtyPalette() const { return _dirtyPalette; }
void setFrameStartPos();
protected:
Common::Rational getFrameRate() const { return _frameRate; }
private:
void decodeZlib(byte *data, int size, int totalSize);
void decode12(int size);
void decode13(int size);
enum ScaleMode {
S_NONE,
S_INTERLACED,
S_DOUBLE
};
Common::SeekableReadStream *_fileStream;
Graphics::Surface *_surface;
byte *_frameBuffer1;
byte *_frameBuffer2;
byte *_scaledBuffer;
byte *_inBuffer;
uint32 _inBufferSize;
byte *_decompBuffer;
uint32 _decompBufferSize;
uint16 _curHeight;
uint32 _frameSize;
ScaleMode _scaleMode;
uint16 _width, _height;
uint32 _frameRate;
uint32 _frameCount;
byte _palette[256 * 3];
mutable bool _dirtyPalette;
int _curFrame;
uint32 _frameStartOffset;
};
};
} // End of namespace Video
#endif
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