mirror of
https://github.com/libretro/scummvm.git
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160 lines
4.1 KiB
C++
160 lines
4.1 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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*
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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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*
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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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*/
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#ifndef VIDEO_MPEGPS_DECODER_H
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#define VIDEO_MPEGPS_DECODER_H
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#include "common/hashmap.h"
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#include "graphics/surface.h"
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#include "video/video_decoder.h"
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namespace Audio {
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class PacketizedAudioStream;
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}
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namespace Common {
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class SeekableReadStream;
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}
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namespace Graphics {
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struct PixelFormat;
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}
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namespace Image {
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class MPEGDecoder;
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}
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namespace Video {
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/**
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* Decoder for MPEG Program Stream videos.
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* Video decoder used in engines:
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* - zvision
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*/
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class MPEGPSDecoder : public VideoDecoder {
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public:
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MPEGPSDecoder();
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virtual ~MPEGPSDecoder();
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bool loadStream(Common::SeekableReadStream *stream);
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void close();
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protected:
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void readNextPacket();
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bool useAudioSync() const { return false; }
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private:
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// Base class for handling MPEG streams
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class MPEGStream {
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public:
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virtual ~MPEGStream() {}
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enum StreamType {
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kStreamTypeVideo,
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kStreamTypeAudio
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};
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virtual bool sendPacket(Common::SeekableReadStream *firstPacket, uint32 pts, uint32 dts) = 0;
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virtual StreamType getStreamType() const = 0;
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};
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// An MPEG 1/2 video track
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class MPEGVideoTrack : public VideoTrack, public MPEGStream {
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public:
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MPEGVideoTrack(Common::SeekableReadStream *firstPacket, const Graphics::PixelFormat &format);
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~MPEGVideoTrack();
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bool endOfTrack() const { return _endOfTrack; }
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uint16 getWidth() const;
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uint16 getHeight() const;
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Graphics::PixelFormat getPixelFormat() const;
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int getCurFrame() const { return _curFrame; }
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uint32 getNextFrameStartTime() const { return _nextFrameStartTime.msecs(); }
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const Graphics::Surface *decodeNextFrame();
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bool sendPacket(Common::SeekableReadStream *packet, uint32 pts, uint32 dts);
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StreamType getStreamType() const { return kStreamTypeVideo; }
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void setEndOfTrack() { _endOfTrack = true; }
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private:
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bool _endOfTrack;
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int _curFrame;
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Audio::Timestamp _nextFrameStartTime;
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Graphics::Surface *_surface;
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void findDimensions(Common::SeekableReadStream *firstPacket, const Graphics::PixelFormat &format);
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#ifdef USE_MPEG2
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Image::MPEGDecoder *_mpegDecoder;
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#endif
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};
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#ifdef USE_MAD
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// An MPEG audio track
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class MPEGAudioTrack : public AudioTrack, public MPEGStream {
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public:
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MPEGAudioTrack(Common::SeekableReadStream &firstPacket);
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~MPEGAudioTrack();
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bool sendPacket(Common::SeekableReadStream *packet, uint32 pts, uint32 dts);
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StreamType getStreamType() const { return kStreamTypeAudio; }
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protected:
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Audio::AudioStream *getAudioStream() const;
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private:
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Audio::PacketizedAudioStream *_audStream;
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};
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#endif
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// The different types of private streams we can detect at the moment
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enum PrivateStreamType {
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kPrivateStreamUnknown,
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kPrivateStreamAC3,
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kPrivateStreamDTS,
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kPrivateStreamDVDPCM,
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kPrivateStreamPS2Audio
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};
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PrivateStreamType detectPrivateStreamType(Common::SeekableReadStream *packet);
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bool addFirstVideoTrack();
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int readNextPacketHeader(int32 &startCode, uint32 &pts, uint32 &dts);
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int findNextStartCode(uint32 &size);
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uint32 readPTS(int c);
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void parseProgramStreamMap(int length);
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byte _psmESType[256];
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// A map from stream types to stream handlers
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typedef Common::HashMap<int, MPEGStream *> StreamMap;
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StreamMap _streamMap;
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Common::SeekableReadStream *_stream;
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};
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} // End of namespace Video
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#endif
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