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https://github.com/libretro/scummvm.git
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152 lines
3.7 KiB
C++
152 lines
3.7 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 SWORD25_THEORADECODER_H
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#define SWORD25_THEORADECODER_H
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#include "graphics/video/video_decoder.h"
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#include "sound/audiostream.h"
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#include "sound/mixer.h"
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#include <theora/theoradec.h>
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#include <vorbis/codec.h>
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namespace Common {
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class SeekableReadStream;
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}
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namespace Sword25 {
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/**
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*
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* Decoder for Theora videos.
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* Video decoder used in engines:
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* - sword25
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*/
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class TheoraDecoder : public Graphics::FixedRateVideoDecoder {
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public:
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TheoraDecoder(Audio::Mixer *mixer = 0, Audio::Mixer::SoundType soundType = Audio::Mixer::kMusicSoundType);
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virtual ~TheoraDecoder();
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/**
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* Load a video file
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* @param stream the stream to load
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*/
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bool load(Common::SeekableReadStream *stream);
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void close();
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void reset();
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/**
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* Decode the next frame and return the frame's surface
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* @note the return surface should *not* be freed
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* @note this may return 0, in which case the last frame should be kept on screen
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*/
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Graphics::Surface *decodeNextFrame();
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bool isVideoLoaded() const {
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return _fileStream != 0;
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}
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bool isPaused() const {
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return (VideoDecoder::isPaused() || !isVideoLoaded());
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}
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uint16 getWidth() const {
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return _surface->w;
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}
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uint16 getHeight() const {
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return _surface->h;
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}
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uint32 getFrameCount() const {
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// It is not possible to get frame count easily
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// I.e. seeking is required
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assert(0);
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}
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Graphics::PixelFormat getPixelFormat() const {
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return Graphics::PixelFormat(4, 8, 8, 8, 8, 16, 8, 0, 24);
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}
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uint32 getElapsedTime() const;
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bool endOfVideo() const;
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protected:
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Common::Rational getFrameRate() const {
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return _frameRate;
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}
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private:
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void queuePage(ogg_page *page);
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int bufferData();
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Audio::QueuingAudioStream *createAudioStream();
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private:
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Common::SeekableReadStream *_fileStream;
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Graphics::Surface *_surface;
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Common::Rational _frameRate;
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uint32 _frameCount;
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Audio::Mixer *_mixer;
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Audio::Mixer::SoundType _soundType;
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Audio::SoundHandle *_audHandle;
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Audio::QueuingAudioStream *_audStream;
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ogg_sync_state _oggSync;
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ogg_page _oggPage;
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ogg_packet _oggPacket;
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ogg_stream_state _vorbisOut;
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ogg_stream_state _theoraOut;
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th_info _theoraInfo;
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th_comment _theoraComment;
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th_dec_ctx *_theoraDecode;
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th_setup_info *_theoraSetup;
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vorbis_info _vorbisInfo;
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vorbis_dsp_state _vorbisDSP;
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vorbis_block _vorbisBlock;
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vorbis_comment _vorbisComment;
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int _theoraPacket;
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int _vorbisPacket;
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bool _stateFlag;
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int _ppLevelMax;
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int _ppLevel;
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int _ppInc;
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// single frame video buffering
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bool _videobufReady;
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ogg_int64_t _videobufGranulePos;
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double _videobufTime;
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// single audio fragment audio buffering
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int _audiobufFill;
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bool _audiobufReady;
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ogg_int16_t *_audiobuf;
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ogg_int64_t _audiobufGranulePos; // time position of last sample
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};
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} // End of namespace Sword25
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#endif
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