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116 lines
2.9 KiB
C++
116 lines
2.9 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef VIDEO_DXA_DECODER_H
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#define VIDEO_DXA_DECODER_H
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#include "common/rational.h"
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#include "graphics/pixelformat.h"
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#include "video/video_decoder.h"
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namespace Common {
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class SeekableReadStream;
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}
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namespace Video {
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/**
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* Decoder for DXA videos.
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*
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* Video decoder used in engines:
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* - agos
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* - sword1
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* - sword2
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*/
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class DXADecoder : public VideoDecoder {
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public:
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DXADecoder();
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virtual ~DXADecoder();
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bool loadStream(Common::SeekableReadStream *stream);
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protected:
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/**
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* Read the sound data out of the given DXA stream
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*/
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virtual void readSoundData(Common::SeekableReadStream *stream);
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private:
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class DXAVideoTrack : public FixedRateVideoTrack {
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public:
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DXAVideoTrack(Common::SeekableReadStream *stream);
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~DXAVideoTrack();
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bool isRewindable() const { return true; }
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bool rewind();
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uint16 getWidth() const { return _width; }
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uint16 getHeight() const { return _height; }
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Graphics::PixelFormat getPixelFormat() const;
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int getCurFrame() const { return _curFrame; }
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int getFrameCount() const { return _frameCount; }
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const Graphics::Surface *decodeNextFrame();
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const byte *getPalette() const { _dirtyPalette = false; return _palette; }
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bool hasDirtyPalette() const { return _dirtyPalette; }
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void setFrameStartPos();
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protected:
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Common::Rational getFrameRate() const { return _frameRate; }
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private:
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void decodeZlib(byte *data, int size, int totalSize);
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void decode12(int size);
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void decode13(int size);
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enum ScaleMode {
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S_NONE,
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S_INTERLACED,
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S_DOUBLE
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};
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Common::SeekableReadStream *_fileStream;
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Graphics::Surface *_surface;
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byte *_frameBuffer1;
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byte *_frameBuffer2;
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byte *_scaledBuffer;
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byte *_inBuffer;
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uint32 _inBufferSize;
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byte *_decompBuffer;
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uint32 _decompBufferSize;
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uint16 _curHeight;
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uint32 _frameSize;
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ScaleMode _scaleMode;
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uint16 _width, _height;
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uint32 _frameRate;
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uint32 _frameCount;
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byte _palette[256 * 3];
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mutable bool _dirtyPalette;
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int _curFrame;
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uint32 _frameStartOffset;
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};
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};
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} // End of namespace Video
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#endif
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