aboutsummaryrefslogtreecommitdiff
path: root/video/smk_decoder.h
blob: 72cd32a222a30c608282817813d400eb900a6e6a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/* 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_SMK_PLAYER_H
#define VIDEO_SMK_PLAYER_H

#include "common/rational.h"
#include "graphics/pixelformat.h"
#include "graphics/surface.h"
#include "video/video_decoder.h"
#include "audio/mixer.h"

namespace Audio {
class QueuingAudioStream;
}

namespace Common {
class SeekableReadStream;
}

namespace Video {

class BigHuffmanTree;

/**
 * Decoder for Smacker v2/v4 videos.
 *
 * 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
 *
 * Video decoder used in engines:
 *  - agos
 *  - saga
 *  - scumm (he)
 *  - sword1
 *  - sword2
 *  - toon
 */
class SmackerDecoder : public FixedRateVideoDecoder {
public:
	SmackerDecoder(Audio::Mixer *mixer,
			Audio::Mixer::SoundType soundType = Audio::Mixer::kSFXSoundType);
	virtual ~SmackerDecoder();

	bool loadStream(Common::SeekableReadStream *stream);
	void close();

	bool isVideoLoaded() const { return _fileStream != 0; }
	uint16 getWidth() const { return _surface->w; }
	uint16 getHeight() const { return _surface->h; }
	uint32 getFrameCount() const { return _frameCount; }
	uint32 getElapsedTime() const;
	const Graphics::Surface *decodeNextFrame();
	Graphics::PixelFormat getPixelFormat() const { return Graphics::PixelFormat::createFormatCLUT8(); }
	const byte *getPalette() { _dirtyPalette = false; return _palette; }
	bool hasDirtyPalette() const { return _dirtyPalette; }
	virtual void handleAudioTrack(byte track, uint32 chunkSize, uint32 unpackedSize);

protected:
	Common::Rational getFrameRate() const { return _frameRate; }
	Common::SeekableReadStream *_fileStream;

protected:
	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);

	enum AudioCompression {
		kCompressionNone,
		kCompressionDPCM,
		kCompressionRDFT,
		kCompressionDCT
	};

	struct AudioInfo {
		AudioCompression compression;
		bool hasAudio;
		bool is16Bits;
		bool isStereo;
		uint32 sampleRate;
	};

	struct {
		uint32 signature;
		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;
	// The RGB palette
	byte _palette[3 * 256];
	bool _dirtyPalette;

	Common::Rational _frameRate;
	uint32 _frameCount;
	Graphics::Surface *_surface;

	Audio::Mixer::SoundType _soundType;
	Audio::Mixer *_mixer;
	bool _audioStarted;
	Audio::QueuingAudioStream *_audioStream;
	Audio::SoundHandle _audioHandle;

	BigHuffmanTree *_MMapTree;
	BigHuffmanTree *_MClrTree;
	BigHuffmanTree *_FullTree;
	BigHuffmanTree *_TypeTree;
};

} // End of namespace Video

#endif