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video/paco_decoder.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 VIDEO_PACODECODER_H
+#define VIDEO_PACODECODER_H
+
+#include "audio/audiostream.h"
+#include "common/list.h"
+#include "common/rect.h"
+#include "graphics/palette.h"
+#include "video/video_decoder.h"
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Graphics {
+struct PixelFormat;
+struct Surface;
+} // namespace Graphics
+
+namespace Video {
+
+/**
+ * Decoder for PACo videos.
+ *
+ * Video decoder used in engines:
+ *  - director
+ */
+class PacoDecoder : public VideoDecoder {
+public:
+	PacoDecoder();
+	virtual ~PacoDecoder();
+	void close() override;
+
+	virtual bool loadStream(Common::SeekableReadStream *stream) override;
+
+	const Common::List<Common::Rect> *getDirtyRects() const;
+	void clearDirtyRects();
+	void copyDirtyRectsToBuffer(uint8 *dst, uint pitch);
+	const byte *getPalette();
+	virtual void readNextPacket() override;
+
+
+protected:
+	class PacoVideoTrack : public FixedRateVideoTrack {
+	public:
+		PacoVideoTrack(
+			uint16 frameRate, uint16 frameCount,  uint16 width, uint16 height);
+		~PacoVideoTrack();
+
+		bool endOfTrack() const override;
+		virtual bool isRewindable() const override { return false; }
+
+		uint16 getWidth() const override;
+		uint16 getHeight() const override;
+		Graphics::PixelFormat getPixelFormat() const override;
+		int getCurFrame() const override { return _curFrame; }
+		int getFrameCount() const override { return _frameCount; }
+		virtual const Graphics::Surface *decodeNextFrame() override;
+		virtual void handleFrame(Common::SeekableReadStream *fileStream, uint32 chunkSize, int curFrame);
+		virtual void handleEOC() { _curFrame += 1; };
+		void handlePalette(Common::SeekableReadStream *fileStream);
+		const byte *getPalette() const override;
+		bool hasDirtyPalette() const override { return _dirtyPalette; }
+
+		const Common::List<Common::Rect> *getDirtyRects() const { return &_dirtyRects; }
+		void clearDirtyRects() { _dirtyRects.clear(); }
+		void copyDirtyRectsToBuffer(uint8 *dst, uint pitch);
+		Common::Rational getFrameRate() const override { return Common::Rational(_frameRate, 1); }
+
+	protected:
+		Graphics::Surface *_surface;
+		Graphics::Palette _palette;
+
+		mutable bool _dirtyPalette;
+
+		int _curFrame;
+		uint32 _frameCount;
+		uint16 _frameRate;
+
+		Common::List<Common::Rect> _dirtyRects;
+	};
+
+	class PacoAudioTrack : public AudioTrack {
+	public:
+		PacoAudioTrack(int samplingRate);
+		~PacoAudioTrack();
+		void queueSound(Common::SeekableReadStream *fileStream, uint32 chunkSize);
+
+	protected:
+		Audio::AudioStream *getAudioStream() const { return _packetStream; }
+
+	private:
+		Audio::PacketizedAudioStream *_packetStream;
+		int _samplingRate;
+	};
+
+private:
+	PacoVideoTrack *_videoTrack;
+	PacoAudioTrack *_audioTrack;
+	Common::SeekableReadStream *_fileStream;
+	int _curFrame = 0;
+	int _frameSizes[65536]; // can be done differently?
+	int getAudioSamplingRate();
+};
+
+} // End of namespace Video
+
+#endif