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https://github.com/libretro/scummvm.git
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89 lines
2.6 KiB
C++
89 lines
2.6 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
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#ifndef SCI_VIDEO_SEQ_DECODER_H
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#define SCI_VIDEO_SEQ_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 Graphics {
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struct Surface;
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}
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namespace Sci {
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/**
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* Implementation of the Sierra SEQ decoder, used in KQ6 DOS floppy/CD and GK1 DOS
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*/
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class SeqDecoder : public Video::FixedRateVideoDecoder {
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public:
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SeqDecoder();
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virtual ~SeqDecoder();
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bool loadStream(Common::SeekableReadStream *stream);
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void close();
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void setFrameDelay(int frameDelay) { _frameDelay = frameDelay; }
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bool isVideoLoaded() const { return _fileStream != 0; }
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uint16 getWidth() const { return SEQ_SCREEN_WIDTH; }
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uint16 getHeight() const { return SEQ_SCREEN_HEIGHT; }
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uint32 getFrameCount() const { return _frameCount; }
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const Graphics::Surface *decodeNextFrame();
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Graphics::PixelFormat getPixelFormat() const { return Graphics::PixelFormat::createFormatCLUT8(); }
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const byte *getPalette() { _dirtyPalette = false; return _palette; }
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bool hasDirtyPalette() const { return _dirtyPalette; }
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protected:
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Common::Rational getFrameRate() const { assert(_frameDelay); return Common::Rational(60, _frameDelay); }
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private:
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enum {
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SEQ_SCREEN_WIDTH = 320,
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SEQ_SCREEN_HEIGHT = 200
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};
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void readPaletteChunk(uint16 chunkSize);
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bool decodeFrame(byte *rleData, int rleSize, byte *litData, int litSize, byte *dest, int left, int width, int height, int colorKey);
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uint16 _width, _height;
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uint16 _frameDelay;
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Common::SeekableReadStream *_fileStream;
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byte _palette[256 * 3];
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bool _dirtyPalette;
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uint32 _frameCount;
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Graphics::Surface *_surface;
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};
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} // End of namespace Sci
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#endif
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