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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* 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 ZVISION_RLF_ANIMATION_H
#define ZVISION_RLF_ANIMATION_H
#include "common/file.h"
#include "graphics/surface.h"
namespace Common {
class String;
}
namespace ZVision {
class RlfAnimation {
public:
RlfAnimation(const Common::String &fileName, bool stream = true);
RlfAnimation(Common::SeekableReadStream *rstream, bool stream);
~RlfAnimation();
private:
enum EncodingType {
Masked,
Simple
};
struct Frame {
EncodingType type;
int8 *encodedData;
uint32 encodedSize;
};
private:
Common::SeekableReadStream *_readStream;
bool _stream;
uint _lastFrameRead;
uint _frameCount;
uint _width;
uint _height;
uint32 _frameTime; // In milliseconds
Frame *_frames;
Common::Array<uint> _completeFrames;
int _currentFrame;
Graphics::Surface _currentFrameBuffer;
uint32 _frameBufferByteSize;
public:
uint frameCount() {
return _frameCount;
}
uint width() {
return _width;
}
uint height() {
return _height;
}
uint32 frameTime() {
return _frameTime;
}
/**
* Seeks to the frameNumber and updates the internal Surface with
* the new frame data. If frameNumber == -1, it only sets _currentFrame,
* the internal Surface is unchanged. This function requires _stream = false
*
* @param frameNumber The frame number to seek to
*/
void seekToFrame(int frameNumber);
/**
* Returns the pixel data of the frame specified. It will try to use
* decodeNextFrame() if possible. If not, it uses seekToFrame() to
* update the internal Surface and then returns a pointer to it.
* This function requires _stream = false
*
* @param frameNumber The frame number to get data for
* @return A pointer to the pixel data. Do NOT delete this.
*/
const Graphics::Surface *getFrameData(uint frameNumber);
/**
* Returns the pixel data of current frame and go to next. It is up to the user to
* check if the current frame is valid before calling this.
* IE. Use endOfAnimation()
*
* @return A pointer to the pixel data. Do NOT delete this.
*/
const Graphics::Surface *decodeNextFrame();
/**
* @return Is the currentFrame is the last frame in the animation?
*/
bool endOfAnimation() {
return _currentFrame == (int)_frameCount;
}
private:
/**
* Reads in the header of the RLF file
*
* @return Will return false if the header magic number is wrong
*/
bool readHeader();
/**
* Reads the next frame from the RLF file, stores the data in
* a Frame object, then returns the object
*
* @return A Frame object representing the frame data
*/
Frame readNextFrame();
/**
* Applies the frame corresponding to frameNumber on top of _currentFrameBuffer.
* This function requires _stream = false so it can look up the Frame object
* referenced by frameNumber.
*
* @param frameNumber The frame number to apply to _currentFrameBuffer
*/
void applyFrameToCurrent(uint frameNumber);
/**
* Applies the data from a Frame object on top of a _currentFrameBuffer.
*
* @param frame A Frame object to apply to _currentFrameBuffer
*/
void applyFrameToCurrent(const RlfAnimation::Frame &frame);
/**
* Decode frame data that uses masked run length encoding. This is the encoding
* used by P-frames.
*
* @param source The source pixel data
* @param dest The destination buffer
* @param sourceSize The size of the source pixel data
* @param destSize The size of the destination buffer
*/
void decodeMaskedRunLengthEncoding(int8 *source, int8 *dest, uint32 sourceSize, uint32 destSize) const;
/**
* Decode frame data that uses simple run length encoding. This is the encoding
* used by I-frames.
*
* @param source The source pixel data
* @param dest The destination buffer
* @param sourceSize The size of the source pixel data
* @param destSize The size of the destination buffer
*/
void decodeSimpleRunLengthEncoding(int8 *source, int8 *dest, uint32 sourceSize, uint32 destSize) const;
};
} // End of namespace ZVision
#endif
|
