blob: 8455e0d1afb2fb9e9891d55dd465c867d4022df2 (
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
|
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2010 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _H_MJPEG_DECODER
#define _H_MJPEG_DECODER
#include "common.h"
#ifdef WIN32
/* We need some hacks to avoid warnings from the jpeg headers */
#define XMD_H
#undef FAR
#endif
extern "C" {
#include <jpeglib.h>
}
extern "C" {
void mjpeg_skip_input_data(j_decompress_ptr cinfo, long num_bytes);
}
class MJpegDecoder {
public:
MJpegDecoder(int width, int height, int stride,
uint8_t *frame, bool back_compat);
~MJpegDecoder();
bool decode_data(uint8_t *data, size_t length);
private:
friend void mjpeg_skip_input_data(j_decompress_ptr cinfo, long num_bytes);
void convert_scanline(void);
void append_data(uint8_t *data, size_t length);
struct jpeg_decompress_struct _cinfo;
struct jpeg_error_mgr _jerr;
struct jpeg_source_mgr _jsrc;
uint8_t *_data;
size_t _data_size;
size_t _data_start;
size_t _data_end;
size_t _extra_skip;
unsigned _width;
unsigned _height;
int _stride;
uint8_t *_frame;
bool _back_compat;
unsigned _y;
uint8_t *_scanline;
int _state;
};
#endif
|
