1 | /*
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2 | * FLV structs and tables
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3 | *
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4 | * Copyright (c) 2006 vixy project
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5 | *
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6 | * This file contains the code that based on FFmpeg (http://ffmpeg.mplayerhq.hu/)
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7 | * See original copyright notice in /FFMPEG_CREDITS and /FFMPEG_IMPORTS
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8 | *
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9 | * This file is part of VIXY FLV Converter.
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10 | *
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11 | * 'VIXY FLV Converter' is free software; you can redistribute it and/or
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12 | * modify it under the terms of the GNU Lesser General Public
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13 | * License as published by the Free Software Foundation; either
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14 | * version 2.1 of the License, or (at your option) any later version.
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15 | *
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16 | * 'VIXY FLV Converter' is distributed in the hope that it will be useful,
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17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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19 | * Lesser General Public License for more details.
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20 | *
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21 | * You should have received a copy of the GNU Lesser General Public
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22 | * License along with FFmpeg; if not, write to the Free Software
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23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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24 | */
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25 |
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26 | #ifndef FLV_H
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27 | #define FLV_H
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28 |
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29 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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30 | #include <stdio.h>
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31 | #include <stdlib.h>
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32 | #include <memory.h>
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33 | #include "bitreader.h"
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34 | #include "bitwriter.h"
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35 |
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36 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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37 | typedef struct _BLOCK
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38 | {
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39 | int block[64];
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40 |
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41 | int index;
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42 | int last_index;
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43 |
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44 | } BLOCK;
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45 |
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46 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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47 | typedef struct _MICROBLOCK
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48 | {
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49 | BLOCK block[6];
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50 | int dquant;
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51 |
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52 | int intra;
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53 | int skip;
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54 | #define MV_TYPE_16X16 0
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55 | #define MV_TYPE_8X8 1
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56 | int mv_type;
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57 | VLCDEC mv_x[4];
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58 | VLCDEC mv_y[4];
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59 |
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60 | } MICROBLOCK;
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61 |
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62 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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63 | typedef struct _PICTURE
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64 | {
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65 | int width;
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66 | int height;
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67 |
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68 |
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69 | #define FLV_I_TYPE 0
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70 | #define FLV_P_TYPE 1
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71 |
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72 | int picture_type; // 0:I 1:P
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73 | int escape_type; // 0:h263 1:flv(11bits)
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74 |
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75 | int qscale;
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76 |
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77 | int frame_number;
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78 |
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79 | } PICTURE;
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80 |
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81 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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82 | int decode_picture_header(BR* p, PICTURE* picture);
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83 | int decode_I_mb(BR* p, MICROBLOCK* mb, int escape_type, int qscale);
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84 | int decode_P_mb(BR* p, MICROBLOCK* mb, int escape_type, int qscale);
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85 |
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86 | void encode_picture_header(BW* bw, PICTURE* picture);
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87 | void encode_I_mb(BW* bw, MICROBLOCK* mb, int escape_type);
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88 | void encode_P_mb(BW* bw, MICROBLOCK* mb, int escape_type);
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89 |
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90 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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91 |
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92 | static const uint16 rl_inter_vlc[103][2] = {
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93 | { 0x2, 2 },{ 0xf, 4 },{ 0x15, 6 },{ 0x17, 7 },
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94 | { 0x1f, 8 },{ 0x25, 9 },{ 0x24, 9 },{ 0x21, 10 },
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95 | { 0x20, 10 },{ 0x7, 11 },{ 0x6, 11 },{ 0x20, 11 },
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96 | { 0x6, 3 },{ 0x14, 6 },{ 0x1e, 8 },{ 0xf, 10 },
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97 | { 0x21, 11 },{ 0x50, 12 },{ 0xe, 4 },{ 0x1d, 8 },
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98 | { 0xe, 10 },{ 0x51, 12 },{ 0xd, 5 },{ 0x23, 9 },
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99 | { 0xd, 10 },{ 0xc, 5 },{ 0x22, 9 },{ 0x52, 12 },
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100 | { 0xb, 5 },{ 0xc, 10 },{ 0x53, 12 },{ 0x13, 6 },
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101 | { 0xb, 10 },{ 0x54, 12 },{ 0x12, 6 },{ 0xa, 10 },
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102 | { 0x11, 6 },{ 0x9, 10 },{ 0x10, 6 },{ 0x8, 10 },
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103 | { 0x16, 7 },{ 0x55, 12 },{ 0x15, 7 },{ 0x14, 7 },
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104 | { 0x1c, 8 },{ 0x1b, 8 },{ 0x21, 9 },{ 0x20, 9 },
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105 | { 0x1f, 9 },{ 0x1e, 9 },{ 0x1d, 9 },{ 0x1c, 9 },
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106 | { 0x1b, 9 },{ 0x1a, 9 },{ 0x22, 11 },{ 0x23, 11 },
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107 | { 0x56, 12 },{ 0x57, 12 },{ 0x7, 4 },{ 0x19, 9 },
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108 | { 0x5, 11 },{ 0xf, 6 },{ 0x4, 11 },{ 0xe, 6 },
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109 | { 0xd, 6 },{ 0xc, 6 },{ 0x13, 7 },{ 0x12, 7 },
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110 | { 0x11, 7 },{ 0x10, 7 },{ 0x1a, 8 },{ 0x19, 8 },
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111 | { 0x18, 8 },{ 0x17, 8 },{ 0x16, 8 },{ 0x15, 8 },
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112 | { 0x14, 8 },{ 0x13, 8 },{ 0x18, 9 },{ 0x17, 9 },
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113 | { 0x16, 9 },{ 0x15, 9 },{ 0x14, 9 },{ 0x13, 9 },
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114 | { 0x12, 9 },{ 0x11, 9 },{ 0x7, 10 },{ 0x6, 10 },
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115 | { 0x5, 10 },{ 0x4, 10 },{ 0x24, 11 },{ 0x25, 11 },
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116 | { 0x26, 11 },{ 0x27, 11 },{ 0x58, 12 },{ 0x59, 12 },
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117 | { 0x5a, 12 },{ 0x5b, 12 },{ 0x5c, 12 },{ 0x5d, 12 },
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118 | { 0x5e, 12 },{ 0x5f, 12 },{ 0x3, 7 },
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119 | };
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120 |
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121 | static const int8 rl_inter_level[102] = {
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122 | 1, 2, 3, 4, 5, 6, 7, 8,
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123 | 9, 10, 11, 12, 1, 2, 3, 4,
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124 | 5, 6, 1, 2, 3, 4, 1, 2,
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125 | 3, 1, 2, 3, 1, 2, 3, 1,
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126 | 2, 3, 1, 2, 1, 2, 1, 2,
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127 | 1, 2, 1, 1, 1, 1, 1, 1,
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128 | 1, 1, 1, 1, 1, 1, 1, 1,
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129 | 1, 1, 1, 2, 3, 1, 2, 1,
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130 | 1, 1, 1, 1, 1, 1, 1, 1,
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131 | 1, 1, 1, 1, 1, 1, 1, 1,
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132 | 1, 1, 1, 1, 1, 1, 1, 1,
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133 | 1, 1, 1, 1, 1, 1, 1, 1,
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134 | 1, 1, 1, 1, 1, 1,
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135 | };
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136 |
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137 | static const int8 rl_inter_run[102] = {
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138 | 0, 0, 0, 0, 0, 0, 0, 0,
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139 | 0, 0, 0, 0, 1, 1, 1, 1,
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140 | 1, 1, 2, 2, 2, 2, 3, 3,
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141 | 3, 4, 4, 4, 5, 5, 5, 6,
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142 | 6, 6, 7, 7, 8, 8, 9, 9,
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143 | 10, 10, 11, 12, 13, 14, 15, 16,
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144 | 17, 18, 19, 20, 21, 22, 23, 24,
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145 | 25, 26, 0, 0, 0, 1, 1, 2,
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146 | 3, 4, 5, 6, 7, 8, 9, 10,
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147 | 11, 12, 13, 14, 15, 16, 17, 18,
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148 | 19, 20, 21, 22, 23, 24, 25, 26,
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149 | 27, 28, 29, 30, 31, 32, 33, 34,
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150 | 35, 36, 37, 38, 39, 40,
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151 | };
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152 |
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153 | //////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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154 | static const int rl_inter_n = 102;
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155 | static const int rl_inter_last = 58;
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156 |
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157 |
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158 | #endif // FLV_H
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