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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.
*
* $URL$
* $Id$
*
*/
// Based on http://wiki.multimedia.cx/index.php?title=Smacker
// and the FFmpeg Smacker decoder (libavcodec/smacker.c), revision 16143
// http://svn.ffmpeg.org/ffmpeg/trunk/libavcodec/smacker.c?revision=16143&view=markup
#ifndef GRAPHICS_SMK_PLAYER_H
#define GRAPHICS_SMK_PLAYER_H
#include "common/scummsys.h"
#include "common/stream.h"
#include "sound/mixer.h"
#include "sound/audiostream.h"
class OSystem;
namespace Graphics {
class BigHuffmanTree;
/**
* Implementation of a Smacker v2/v4 video decoder
*/
class SMKPlayer {
public:
SMKPlayer(Audio::Mixer *mixer);
virtual ~SMKPlayer();
/**
* Returns the width of the video
* @return the width of the video
*/
int getWidth();
/**
* Returns the height of the video
* @return the height of the video
*/
int getHeight();
/**
* Returns the current frame number of the video
* @return the current frame number of the video
*/
int32 getCurFrame();
/**
* Returns the amount of frames in the video
* @return the amount of frames in the video
*/
int32 getFrameCount();
/**
* Returns the frame rate of the video
* If > 0, fps are 1000 / FrameRate
* If < 0, fps are 100000 / (-FrameRate)
* If 0, fps are 10
* @return the frame rate of the video
*/
int32 getFrameRate();
/**
* Returns the time to wait for each frame in 1/100 ms
* @return the time to wait for each frame in 1/100 ms
*/
int32 getFrameDelay();
/**
* Returns the current A/V lag in 1/100 ms
* If > 0, audio lags behind
* If < 0, video lags behind
* @return the current A/V lag in 1/100 ms
*/
int32 getAudioLag();
/**
* Returns the time to wait until the next frame in ms, minding any lag
* @return the time to wait until the next frame in ms
*/
uint32 getFrameWaitTime();
/**
* Load an SMK encoded video file
* @param filename the filename to load
*/
bool loadFile(const char *filename);
/**
* Close an SMK encoded video file
*/
void closeFile();
protected:
/**
* Set palette, based on current frame
* @param pal the palette data
*/
virtual void setPalette(byte *pal) = 0;
/**
* Copy current frame into the specified position of the destination
* buffer.
* @param dst the buffer
* @param x the x position of the buffer
* @param y the y position of the buffer
* @param pitch the pitch of buffer
*/
void copyFrameToBuffer(byte *dst, uint x, uint y, uint pitch);
/**
* Decode the next frame
*/
bool decodeNextFrame();
Common::SeekableReadStream *_fileStream;
byte *_image;
private:
void unpackPalette();
// Possible runs of blocks
uint getBlockRun(int index) { return (index <= 58) ? index + 1 : 128 << (index - 59); }
void queueCompressedBuffer(byte *buffer, uint32 bufferSize, uint32 unpackedSize, int streamNum);
struct AudioInfo {
bool isCompressed;
bool hasAudio;
bool is16Bits;
bool isStereo;
bool hasV2Compression;
uint32 sampleRate;
};
struct {
uint32 signature;
uint32 width;
uint32 height;
uint32 frames;
int32 frameRate;
uint32 flags;
uint32 audioSize[7];
uint32 treesSize;
uint32 mMapSize;
uint32 mClrSize;
uint32 fullSize;
uint32 typeSize;
AudioInfo audioInfo[7];
uint32 dummy;
} _header;
uint32 *_frameSizes;
// The FrameTypes section of a Smacker file contains an array of bytes, where
// the 8 bits of each byte describe the contents of the corresponding frame.
// The highest 7 bits correspond to audio frames (bit 7 is track 6, bit 6 track 5
// and so on), so there can be up to 7 different audio tracks. When the lowest bit
// (bit 0) is set, it denotes a frame that contains a palette record
byte *_frameTypes;
byte *_frameData;
byte *_palette;
Audio::Mixer *_mixer;
bool _audioStarted;
Audio::AppendableAudioStream *_audioStream;
Audio::SoundHandle _audioHandle;
uint32 _currentSMKFrame;
BigHuffmanTree *_MMapTree;
BigHuffmanTree *_MClrTree;
BigHuffmanTree *_FullTree;
BigHuffmanTree *_TypeTree;
};
} // End of namespace Graphics
#endif
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