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4349 | Serge | 1 | /* |
2 | * MJPEG encoder and decoder |
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3 | * Copyright (c) 2000, 2001 Fabrice Bellard |
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4 | * Copyright (c) 2003 Alex Beregszaszi |
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5 | * Copyright (c) 2003-2004 Michael Niedermayer |
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6 | * |
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7 | * Support for external huffman table, various fixes (AVID workaround), |
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8 | * aspecting, new decode_frame mechanism and apple mjpeg-b support |
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9 | * by Alex Beregszaszi |
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10 | * |
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11 | * This file is part of FFmpeg. |
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12 | * |
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13 | * FFmpeg is free software; you can redistribute it and/or |
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14 | * modify it under the terms of the GNU Lesser General Public |
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15 | * License as published by the Free Software Foundation; either |
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16 | * version 2.1 of the License, or (at your option) any later version. |
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17 | * |
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18 | * FFmpeg is distributed in the hope that it will be useful, |
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19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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21 | * Lesser General Public License for more details. |
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22 | * |
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23 | * You should have received a copy of the GNU Lesser General Public |
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24 | * License along with FFmpeg; if not, write to the Free Software |
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25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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26 | */ |
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27 | |||
28 | /** |
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29 | * @file |
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30 | * MJPEG encoder and decoder. |
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31 | */ |
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32 | |||
33 | #ifndef AVCODEC_MJPEG_H |
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34 | #define AVCODEC_MJPEG_H |
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35 | |||
36 | #include "avcodec.h" |
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37 | #include "put_bits.h" |
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38 | |||
39 | |||
40 | /* JPEG marker codes */ |
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41 | typedef enum { |
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42 | /* start of frame */ |
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43 | SOF0 = 0xc0, /* baseline */ |
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44 | SOF1 = 0xc1, /* extended sequential, huffman */ |
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45 | SOF2 = 0xc2, /* progressive, huffman */ |
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46 | SOF3 = 0xc3, /* lossless, huffman */ |
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47 | |||
48 | SOF5 = 0xc5, /* differential sequential, huffman */ |
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49 | SOF6 = 0xc6, /* differential progressive, huffman */ |
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50 | SOF7 = 0xc7, /* differential lossless, huffman */ |
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51 | JPG = 0xc8, /* reserved for JPEG extension */ |
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52 | SOF9 = 0xc9, /* extended sequential, arithmetic */ |
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53 | SOF10 = 0xca, /* progressive, arithmetic */ |
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54 | SOF11 = 0xcb, /* lossless, arithmetic */ |
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55 | |||
56 | SOF13 = 0xcd, /* differential sequential, arithmetic */ |
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57 | SOF14 = 0xce, /* differential progressive, arithmetic */ |
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58 | SOF15 = 0xcf, /* differential lossless, arithmetic */ |
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59 | |||
60 | DHT = 0xc4, /* define huffman tables */ |
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61 | |||
62 | DAC = 0xcc, /* define arithmetic-coding conditioning */ |
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63 | |||
64 | /* restart with modulo 8 count "m" */ |
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65 | RST0 = 0xd0, |
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66 | RST1 = 0xd1, |
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67 | RST2 = 0xd2, |
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68 | RST3 = 0xd3, |
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69 | RST4 = 0xd4, |
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70 | RST5 = 0xd5, |
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71 | RST6 = 0xd6, |
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72 | RST7 = 0xd7, |
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73 | |||
74 | SOI = 0xd8, /* start of image */ |
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75 | EOI = 0xd9, /* end of image */ |
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76 | SOS = 0xda, /* start of scan */ |
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77 | DQT = 0xdb, /* define quantization tables */ |
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78 | DNL = 0xdc, /* define number of lines */ |
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79 | DRI = 0xdd, /* define restart interval */ |
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80 | DHP = 0xde, /* define hierarchical progression */ |
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81 | EXP = 0xdf, /* expand reference components */ |
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82 | |||
83 | APP0 = 0xe0, |
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84 | APP1 = 0xe1, |
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85 | APP2 = 0xe2, |
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86 | APP3 = 0xe3, |
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87 | APP4 = 0xe4, |
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88 | APP5 = 0xe5, |
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89 | APP6 = 0xe6, |
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90 | APP7 = 0xe7, |
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91 | APP8 = 0xe8, |
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92 | APP9 = 0xe9, |
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93 | APP10 = 0xea, |
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94 | APP11 = 0xeb, |
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95 | APP12 = 0xec, |
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96 | APP13 = 0xed, |
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97 | APP14 = 0xee, |
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98 | APP15 = 0xef, |
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99 | |||
100 | JPG0 = 0xf0, |
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101 | JPG1 = 0xf1, |
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102 | JPG2 = 0xf2, |
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103 | JPG3 = 0xf3, |
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104 | JPG4 = 0xf4, |
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105 | JPG5 = 0xf5, |
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106 | JPG6 = 0xf6, |
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107 | SOF48 = 0xf7, ///< JPEG-LS |
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108 | LSE = 0xf8, ///< JPEG-LS extension parameters |
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109 | JPG9 = 0xf9, |
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110 | JPG10 = 0xfa, |
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111 | JPG11 = 0xfb, |
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112 | JPG12 = 0xfc, |
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113 | JPG13 = 0xfd, |
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114 | |||
115 | COM = 0xfe, /* comment */ |
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116 | |||
117 | TEM = 0x01, /* temporary private use for arithmetic coding */ |
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118 | |||
119 | /* 0x02 -> 0xbf reserved */ |
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120 | } JPEG_MARKER; |
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121 | |||
122 | static inline void put_marker(PutBitContext *p, int code) |
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123 | { |
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124 | put_bits(p, 8, 0xff); |
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125 | put_bits(p, 8, code); |
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126 | } |
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127 | |||
128 | #define PREDICT(ret, topleft, top, left, predictor)\ |
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129 | switch(predictor){\ |
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130 | case 0: ret= 0; break;\ |
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131 | case 1: ret= left; break;\ |
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132 | case 2: ret= top; break;\ |
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133 | case 3: ret= topleft; break;\ |
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134 | case 4: ret= left + top - topleft; break;\ |
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135 | case 5: ret= left + ((top - topleft)>>1); break;\ |
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136 | case 6: ret= top + ((left - topleft)>>1); break;\ |
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137 | default:\ |
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138 | case 7: ret= (left + top)>>1; break;\ |
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139 | } |
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140 | |||
141 | extern av_export const uint8_t avpriv_mjpeg_bits_dc_luminance[]; |
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142 | extern av_export const uint8_t avpriv_mjpeg_val_dc[]; |
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143 | |||
144 | extern av_export const uint8_t avpriv_mjpeg_bits_dc_chrominance[]; |
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145 | |||
146 | extern av_export const uint8_t avpriv_mjpeg_bits_ac_luminance[]; |
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147 | extern av_export const uint8_t avpriv_mjpeg_val_ac_luminance[]; |
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148 | |||
149 | extern av_export const uint8_t avpriv_mjpeg_bits_ac_chrominance[]; |
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150 | extern av_export const uint8_t avpriv_mjpeg_val_ac_chrominance[]; |
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151 | |||
152 | void ff_mjpeg_build_huffman_codes(uint8_t *huff_size, uint16_t *huff_code, |
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153 | const uint8_t *bits_table, |
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154 | const uint8_t *val_table); |
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155 | |||
156 | #endif /* AVCODEC_MJPEG_H */>> |