Initial commit

video/theora_decoder.h

@@ -0,0 +1,181 @@
+/* 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/>.
+ *
+ */
+
+#include "common/scummsys.h"	// for USE_THEORADEC
+
+#ifdef USE_THEORADEC
+
+#ifndef VIDEO_THEORA_DECODER_H
+#define VIDEO_THEORA_DECODER_H
+
+#include "common/rational.h"
+#include "video/video_decoder.h"
+#include "audio/mixer.h"
+#include "graphics/surface.h"
+
+#include <theora/theoradec.h>
+
+#ifdef USE_TREMOR
+#include <tremor/ivorbiscodec.h>
+#else
+#include <vorbis/codec.h>
+#endif
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Audio {
+class AudioStream;
+class QueuingAudioStream;
+}
+
+namespace Video {
+
+/**
+ *
+ * Decoder for Theora videos.
+ * Video decoder used in engines:
+ *  - ags
+ *  - asylum
+ *  - grim
+ *  - pegasus
+ *  - sword25
+ *  - tetraedge
+ *  - wintermute
+ */
+class TheoraDecoder : public VideoDecoder {
+public:
+	TheoraDecoder();
+	virtual ~TheoraDecoder();
+
+	/**
+	 * Load a video file
+	 * @param stream  the stream to load
+	 */
+	bool loadStream(Common::SeekableReadStream *stream);
+	void close();
+
+	/** Frames per second of the loaded video. */
+	Common::Rational getFrameRate() const;
+
+protected:
+	void readNextPacket();
+
+private:
+	class TheoraVideoTrack : public VideoTrack {
+	public:
+		TheoraVideoTrack(th_info &theoraInfo, th_setup_info *theoraSetup);
+		~TheoraVideoTrack();
+
+		bool endOfTrack() const { return _endOfVideo; }
+		uint16 getWidth() const { return _width; }
+		uint16 getHeight() const { return _height; }
+		Graphics::PixelFormat getPixelFormat() const { return _pixelFormat; }
+		bool setOutputPixelFormat(const Graphics::PixelFormat &format) {
+			if (format.bytesPerPixel != 2 && format.bytesPerPixel != 4)
+				return false;
+			_pixelFormat = format;
+			return true;
+		}
+
+		int getCurFrame() const { return _curFrame; }
+		const Common::Rational &getFrameRate() const { return _frameRate; }
+		uint32 getNextFrameStartTime() const { return (uint32)(_nextFrameStartTime * 1000); }
+		const Graphics::Surface *decodeNextFrame() { return _displaySurface; }
+
+		bool decodePacket(ogg_packet &oggPacket);
+		void setEndOfVideo() { _endOfVideo = true; }
+
+	private:
+		int _curFrame;
+		bool _endOfVideo;
+		Common::Rational _frameRate;
+		double _nextFrameStartTime;
+
+		Graphics::Surface *_surface;
+		Graphics::Surface *_displaySurface;
+		Graphics::PixelFormat _pixelFormat;
+		int _x;
+		int _y;
+		uint16 _width;
+		uint16 _height;
+		uint16 _surfaceWidth;
+		uint16 _surfaceHeight;
+
+		th_dec_ctx *_theoraDecode;
+		th_pixel_fmt _theoraPixelFormat;
+
+		void translateYUVtoRGBA(th_ycbcr_buffer &YUVBuffer);
+	};
+
+	class VorbisAudioTrack : public AudioTrack {
+	public:
+		VorbisAudioTrack(Audio::Mixer::SoundType soundType, vorbis_info &vorbisInfo);
+		~VorbisAudioTrack();
+
+		bool decodeSamples();
+		bool hasAudio() const;
+		bool needsAudio() const;
+		void synthesizePacket(ogg_packet &oggPacket);
+		void setEndOfAudio() { _endOfAudio = true; }
+
+	protected:
+		Audio::AudioStream *getAudioStream() const;
+
+	private:
+		// single audio fragment audio buffering
+		int _audioBufferFill;
+		ogg_int16_t *_audioBuffer;
+
+		Audio::QueuingAudioStream *_audStream;
+
+		vorbis_block _vorbisBlock;
+		vorbis_dsp_state _vorbisDSP;
+
+		bool _endOfAudio;
+	};
+
+	void queuePage(ogg_page *page);
+	int bufferData();
+	bool queueAudio();
+	void ensureAudioBufferSize();
+
+	Common::SeekableReadStream *_fileStream;
+
+	ogg_sync_state _oggSync;
+	ogg_page _oggPage;
+	ogg_packet _oggPacket;
+
+	ogg_stream_state _theoraOut, _vorbisOut;
+	bool _hasVideo, _hasAudio;
+
+	vorbis_info _vorbisInfo;
+
+	TheoraVideoTrack *_videoTrack;
+	VorbisAudioTrack *_audioTrack;
+};
+
+} // End of namespace Video
+
+#endif
+
+#endif