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Diffstat (limited to 'video/theora_decoder.h')
-rw-r--r-- | video/theora_decoder.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/video/theora_decoder.h b/video/theora_decoder.h new file mode 100644 index 0000000000..459fc064d3 --- /dev/null +++ b/video/theora_decoder.h @@ -0,0 +1,144 @@ +/* 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 2 + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#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/audiostream.h" +#include "audio/mixer.h" +#include "graphics/pixelformat.h" +#include "graphics/surface.h" + +#include <theora/theoradec.h> +#include <vorbis/codec.h> + +namespace Common { +class SeekableReadStream; +} + +namespace Video { + +/** + * + * Decoder for Theora videos. + * Video decoder used in engines: + * - sword25 + */ +class TheoraDecoder : public VideoDecoder { +public: + TheoraDecoder(Audio::Mixer::SoundType soundType = Audio::Mixer::kMusicSoundType); + virtual ~TheoraDecoder(); + + /** + * Load a video file + * @param stream the stream to load + */ + bool loadStream(Common::SeekableReadStream *stream); + void close(); + void reset(); + + /** + * Decode the next frame and return the frame's surface + * @note the return surface should *not* be freed + * @note this may return 0, in which case the last frame should be kept on screen + */ + const Graphics::Surface *decodeNextFrame(); + + bool isVideoLoaded() const { return _fileStream != 0; } + uint16 getWidth() const { return _displaySurface.w; } + uint16 getHeight() const { return _displaySurface.h; } + + uint32 getFrameCount() const { + // It is not possible to get frame count easily + // I.e. seeking is required + assert(0); + return 0; + } + + Graphics::PixelFormat getPixelFormat() const { return _displaySurface.format; } + uint32 getTime() const; + uint32 getTimeToNextFrame() const; + + bool endOfVideo() const; + +protected: + // VideoDecoder API + void updateVolume(); + void updateBalance(); + void pauseVideoIntern(bool pause); + +private: + void queuePage(ogg_page *page); + bool queueAudio(); + int bufferData(); + void translateYUVtoRGBA(th_ycbcr_buffer &YUVBuffer); + + Common::SeekableReadStream *_fileStream; + Graphics::Surface _surface; + Graphics::Surface _displaySurface; + Common::Rational _frameRate; + double _nextFrameStartTime; + bool _endOfVideo; + bool _endOfAudio; + + Audio::Mixer::SoundType _soundType; + Audio::SoundHandle *_audHandle; + Audio::QueuingAudioStream *_audStream; + + ogg_sync_state _oggSync; + ogg_page _oggPage; + ogg_packet _oggPacket; + ogg_stream_state _vorbisOut; + ogg_stream_state _theoraOut; + th_info _theoraInfo; + th_comment _theoraComment; + th_dec_ctx *_theoraDecode; + th_setup_info *_theoraSetup; + vorbis_info _vorbisInfo; + vorbis_dsp_state _vorbisDSP; + vorbis_block _vorbisBlock; + vorbis_comment _vorbisComment; + + int _theoraPacket; + int _vorbisPacket; + + int _ppLevelMax; + int _ppLevel; + int _ppInc; + + // single audio fragment audio buffering + int _audiobufFill; + bool _audiobufReady; + ogg_int16_t *_audiobuf; +}; + +} // End of namespace Video + +#endif + +#endif |