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130 lines
3.3 KiB
C++
130 lines
3.3 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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/**
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* Video decoder used in engines:
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* - agos
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* - saga
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* - scumm (he)
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* - sword1
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* - sword2
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*/
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// Based on http://wiki.multimedia.cx/index.php?title=Smacker
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// and the FFmpeg Smacker decoder (libavcodec/smacker.c), revision 16143
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// http://svn.ffmpeg.org/ffmpeg/trunk/libavcodec/smacker.c?revision=16143&view=markup
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#ifndef GRAPHICS_VIDEO_SMK_PLAYER_H
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#define GRAPHICS_VIDEO_SMK_PLAYER_H
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#include "graphics/video/video_player.h"
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#include "sound/mixer.h"
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namespace Audio {
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class AppendableAudioStream;
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}
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namespace Graphics {
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class BigHuffmanTree;
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/**
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* Implementation of a Smacker v2/v4 video decoder
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*/
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class SmackerDecoder : public VideoDecoder {
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public:
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SmackerDecoder(Audio::Mixer *mixer);
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virtual ~SmackerDecoder();
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int getHeight();
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int32 getAudioLag();
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/**
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* Load an SMK encoded video file
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* @param filename the filename to load
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*/
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bool loadFile(const char *filename);
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/**
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* Close an SMK encoded video file
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*/
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void closeFile();
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bool decodeNextFrame();
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private:
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void unpackPalette();
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// Possible runs of blocks
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uint getBlockRun(int index) { return (index <= 58) ? index + 1 : 128 << (index - 59); }
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void queueCompressedBuffer(byte *buffer, uint32 bufferSize, uint32 unpackedSize, int streamNum);
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struct AudioInfo {
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bool isCompressed;
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bool hasAudio;
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bool is16Bits;
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bool isStereo;
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bool hasV2Compression;
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uint32 sampleRate;
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};
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struct {
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uint32 signature;
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uint32 flags;
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uint32 audioSize[7];
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uint32 treesSize;
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uint32 mMapSize;
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uint32 mClrSize;
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uint32 fullSize;
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uint32 typeSize;
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AudioInfo audioInfo[7];
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uint32 dummy;
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} _header;
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uint32 *_frameSizes;
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// The FrameTypes section of a Smacker file contains an array of bytes, where
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// the 8 bits of each byte describe the contents of the corresponding frame.
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// The highest 7 bits correspond to audio frames (bit 7 is track 6, bit 6 track 5
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// and so on), so there can be up to 7 different audio tracks. When the lowest bit
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// (bit 0) is set, it denotes a frame that contains a palette record
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byte *_frameTypes;
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byte *_frameData;
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// The RGB palette
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byte *_palette;
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Audio::Mixer *_mixer;
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bool _audioStarted;
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Audio::AppendableAudioStream *_audioStream;
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Audio::SoundHandle _audioHandle;
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BigHuffmanTree *_MMapTree;
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BigHuffmanTree *_MClrTree;
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BigHuffmanTree *_FullTree;
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BigHuffmanTree *_TypeTree;
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};
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} // End of namespace Graphics
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#endif
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