1 /*
2  * MJPEG encoder and decoder
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  * Copyright (c) 2003 Alex Beregszaszi
5  * Copyright (c) 2003-2004 Michael Niedermayer
6  *
7  * Support for external huffman table, various fixes (AVID workaround),
8  * aspecting, new decode_frame mechanism and apple mjpeg-b support
9  *                                  by Alex Beregszaszi
10  *
11  * This file is part of FFmpeg.
12  *
13  * FFmpeg is free software; you can redistribute it and/or
14  * modify it under the terms of the GNU Lesser General Public
15  * License as published by the Free Software Foundation; either
16  * version 2.1 of the License, or (at your option) any later version.
17  *
18  * FFmpeg is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21  * Lesser General Public License for more details.
22  *
23  * You should have received a copy of the GNU Lesser General Public
24  * License along with FFmpeg; if not, write to the Free Software
25  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26  */
27 
28 /**
29  * @file
30  * MJPEG encoder and decoder.
31  */
32 
33 #include "jpegtabs.h"
34 
35 #if 0
36 /* These are the sample quantization tables given in JPEG spec section K.1.
37  * The spec says that the values given produce "good" quality, and
38  * when divided by 2, "very good" quality.
39  */
40 static const unsigned char std_luminance_quant_tbl[64] = {
41     16,  11,  10,  16,  24,  40,  51,  61,
42     12,  12,  14,  19,  26,  58,  60,  55,
43     14,  13,  16,  24,  40,  57,  69,  56,
44     14,  17,  22,  29,  51,  87,  80,  62,
45     18,  22,  37,  56,  68, 109, 103,  77,
46     24,  35,  55,  64,  81, 104, 113,  92,
47     49,  64,  78,  87, 103, 121, 120, 101,
48     72,  92,  95,  98, 112, 100, 103,  99
49 };
50 static const unsigned char std_chrominance_quant_tbl[64] = {
51     17,  18,  24,  47,  99,  99,  99,  99,
52     18,  21,  26,  66,  99,  99,  99,  99,
53     24,  26,  56,  99,  99,  99,  99,  99,
54     47,  66,  99,  99,  99,  99,  99,  99,
55     99,  99,  99,  99,  99,  99,  99,  99,
56     99,  99,  99,  99,  99,  99,  99,  99,
57     99,  99,  99,  99,  99,  99,  99,  99,
58     99,  99,  99,  99,  99,  99,  99,  99
59 };
60 #endif
61