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engines/alg/video.h

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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 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 ALG_VIDEO_H
+#define ALG_VIDEO_H
+
+#include "audio/audiostream.h"
+#include "audio/mixer.h"
+
+#include "common/file.h"
+
+namespace Alg {
+
+class AlgVideoDecoder {
+public:
+	AlgVideoDecoder();
+	~AlgVideoDecoder();
+	void getNextFrame();
+	void loadVideoFromStream(uint32 offset);
+	void skipNumberOfFrames(uint32 num);
+	void setInputFile(Common::File *input) { _input = input; }
+	bool isFinished() const { return _bytesLeft == 0; }
+	Graphics::Surface *getVideoFrame() const { return _frame; }
+	void setPalette(uint8 *palette) { _palette = palette; }
+	bool isPaletteDirty() const { return _paletteDirty; }
+	void pauseAudio(bool pause) const { g_system->getMixer()->pauseHandle(_audioHandle, pause); }
+	uint16 getWidth() const { return _width; }
+	uint16 getHeight() const { return _height; }
+	uint32 getCurrentFrame() const { return _currentFrame; }
+
+private:
+	Common::File *_input;
+	Graphics::Surface *_frame;
+	Audio::PacketizedAudioStream *_audioStream;
+	Audio::SoundHandle _audioHandle;
+	uint8 *_palette;
+	bool _paletteDirty;
+	bool _gotVideoFrame;
+	uint32 _currentFrame;
+	uint32 _size;
+	uint32 _bytesLeft;
+	uint16 _currentChunk;
+
+	uint16 _numChunks = 0;
+	uint16 _frameRate = 0;
+	uint16 _videoMode = 0;
+	uint16 _width = 0;
+	uint16 _height = 0;
+	uint16 _audioType = 0;
+
+	void readNextChunk();
+	void decodeIntraFrame(uint32 size, uint8 hh, uint8 hv);
+	void decodeInterFrame(uint32 size, uint8 hh, uint8 hv);
+	void updatePalette(uint32 size, bool partial);
+	void readAudioData(uint32 size, uint16 rate);
+};
+
+} // End of namespace Alg
+
+#endif