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