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Rev | Author | Line No. | Line |
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4349 | Serge | 1 | /* |
2 | * Copyright (C) 2006 Aurelien Jacobs |
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3 | * |
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4 | * This file is part of FFmpeg. |
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5 | * |
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6 | * FFmpeg is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU Lesser General Public |
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8 | * License as published by the Free Software Foundation; either |
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9 | * version 2.1 of the License, or (at your option) any later version. |
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10 | * |
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11 | * FFmpeg is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with FFmpeg; if not, write to the Free Software |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | */ |
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20 | |||
21 | /** |
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22 | * @file |
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23 | * VP6 compatible video decoder |
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24 | * |
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25 | * The VP6F decoder accepts an optional 1 byte extradata. It is composed of: |
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26 | * - upper 4 bits: difference between encoded width and visible width |
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27 | * - lower 4 bits: difference between encoded height and visible height |
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28 | */ |
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29 | |||
30 | #include |
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31 | |||
32 | #include "avcodec.h" |
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33 | #include "get_bits.h" |
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34 | #include "huffman.h" |
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35 | |||
36 | #include "vp56.h" |
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37 | #include "vp56data.h" |
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38 | #include "vp6data.h" |
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39 | |||
40 | #define VP6_MAX_HUFF_SIZE 12 |
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41 | |||
42 | static void vp6_parse_coeff(VP56Context *s); |
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43 | static void vp6_parse_coeff_huffman(VP56Context *s); |
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44 | |||
45 | static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size) |
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46 | { |
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47 | VP56RangeCoder *c = &s->c; |
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48 | int parse_filter_info = 0; |
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49 | int coeff_offset = 0; |
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50 | int vrt_shift = 0; |
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51 | int sub_version; |
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52 | int rows, cols; |
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53 | int res = 0; |
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54 | int separated_coeff = buf[0] & 1; |
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55 | |||
56 | s->frames[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80); |
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57 | ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F); |
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58 | |||
59 | if (s->frames[VP56_FRAME_CURRENT]->key_frame) { |
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60 | sub_version = buf[1] >> 3; |
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61 | if (sub_version > 8) |
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62 | return AVERROR_INVALIDDATA; |
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63 | s->filter_header = buf[1] & 0x06; |
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64 | if (buf[1] & 1) { |
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65 | avpriv_report_missing_feature(s->avctx, "Interlacing"); |
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66 | return AVERROR_PATCHWELCOME; |
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67 | } |
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68 | if (separated_coeff || !s->filter_header) { |
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69 | coeff_offset = AV_RB16(buf+2) - 2; |
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70 | buf += 2; |
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71 | buf_size -= 2; |
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72 | } |
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73 | |||
74 | rows = buf[2]; /* number of stored macroblock rows */ |
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75 | cols = buf[3]; /* number of stored macroblock cols */ |
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76 | /* buf[4] is number of displayed macroblock rows */ |
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77 | /* buf[5] is number of displayed macroblock cols */ |
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78 | if (!rows || !cols) { |
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79 | av_log(s->avctx, AV_LOG_ERROR, "Invalid size %dx%d\n", cols << 4, rows << 4); |
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80 | return AVERROR_INVALIDDATA; |
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81 | } |
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82 | |||
83 | if (!s->macroblocks || /* first frame */ |
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84 | 16*cols != s->avctx->coded_width || |
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85 | 16*rows != s->avctx->coded_height) { |
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86 | if (s->avctx->extradata_size == 0 && |
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87 | FFALIGN(s->avctx->width, 16) == 16 * cols && |
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88 | FFALIGN(s->avctx->height, 16) == 16 * rows) { |
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89 | // We assume this is properly signalled container cropping, |
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90 | // in an F4V file. Just set the coded_width/height, don't |
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91 | // touch the cropped ones. |
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92 | s->avctx->coded_width = 16 * cols; |
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93 | s->avctx->coded_height = 16 * rows; |
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94 | } else { |
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95 | avcodec_set_dimensions(s->avctx, 16 * cols, 16 * rows); |
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96 | if (s->avctx->extradata_size == 1) { |
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97 | s->avctx->width -= s->avctx->extradata[0] >> 4; |
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98 | s->avctx->height -= s->avctx->extradata[0] & 0x0F; |
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99 | } |
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100 | } |
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101 | res = VP56_SIZE_CHANGE; |
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102 | } |
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103 | |||
104 | ff_vp56_init_range_decoder(c, buf+6, buf_size-6); |
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105 | vp56_rac_gets(c, 2); |
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106 | |||
107 | parse_filter_info = s->filter_header; |
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108 | if (sub_version < 8) |
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109 | vrt_shift = 5; |
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110 | s->sub_version = sub_version; |
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111 | s->golden_frame = 0; |
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112 | } else { |
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113 | if (!s->sub_version || !s->avctx->coded_width || !s->avctx->coded_height) |
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114 | return AVERROR_INVALIDDATA; |
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115 | |||
116 | if (separated_coeff || !s->filter_header) { |
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117 | coeff_offset = AV_RB16(buf+1) - 2; |
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118 | buf += 2; |
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119 | buf_size -= 2; |
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120 | } |
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121 | ff_vp56_init_range_decoder(c, buf+1, buf_size-1); |
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122 | |||
123 | s->golden_frame = vp56_rac_get(c); |
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124 | if (s->filter_header) { |
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125 | s->deblock_filtering = vp56_rac_get(c); |
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126 | if (s->deblock_filtering) |
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127 | vp56_rac_get(c); |
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128 | if (s->sub_version > 7) |
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129 | parse_filter_info = vp56_rac_get(c); |
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130 | } |
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131 | } |
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132 | |||
133 | if (parse_filter_info) { |
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134 | if (vp56_rac_get(c)) { |
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135 | s->filter_mode = 2; |
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136 | s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift; |
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137 | s->max_vector_length = 2 << vp56_rac_gets(c, 3); |
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138 | } else if (vp56_rac_get(c)) { |
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139 | s->filter_mode = 1; |
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140 | } else { |
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141 | s->filter_mode = 0; |
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142 | } |
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143 | if (s->sub_version > 7) |
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144 | s->filter_selection = vp56_rac_gets(c, 4); |
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145 | else |
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146 | s->filter_selection = 16; |
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147 | } |
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148 | |||
149 | s->use_huffman = vp56_rac_get(c); |
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150 | |||
151 | s->parse_coeff = vp6_parse_coeff; |
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152 | if (coeff_offset) { |
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153 | buf += coeff_offset; |
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154 | buf_size -= coeff_offset; |
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155 | if (buf_size < 0) { |
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156 | if (s->frames[VP56_FRAME_CURRENT]->key_frame) |
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157 | avcodec_set_dimensions(s->avctx, 0, 0); |
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158 | return AVERROR_INVALIDDATA; |
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159 | } |
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160 | if (s->use_huffman) { |
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161 | s->parse_coeff = vp6_parse_coeff_huffman; |
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162 | init_get_bits(&s->gb, buf, buf_size<<3); |
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163 | } else { |
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164 | ff_vp56_init_range_decoder(&s->cc, buf, buf_size); |
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165 | s->ccp = &s->cc; |
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166 | } |
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167 | } else { |
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168 | s->ccp = &s->c; |
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169 | } |
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170 | |||
171 | return res; |
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172 | } |
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173 | |||
174 | static void vp6_coeff_order_table_init(VP56Context *s) |
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175 | { |
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176 | int i, pos, idx = 1; |
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177 | |||
178 | s->modelp->coeff_index_to_pos[0] = 0; |
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179 | for (i=0; i<16; i++) |
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180 | for (pos=1; pos<64; pos++) |
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181 | if (s->modelp->coeff_reorder[pos] == i) |
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182 | s->modelp->coeff_index_to_pos[idx++] = pos; |
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183 | } |
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184 | |||
185 | static void vp6_default_models_init(VP56Context *s) |
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186 | { |
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187 | VP56Model *model = s->modelp; |
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188 | |||
189 | model->vector_dct[0] = 0xA2; |
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190 | model->vector_dct[1] = 0xA4; |
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191 | model->vector_sig[0] = 0x80; |
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192 | model->vector_sig[1] = 0x80; |
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193 | |||
194 | memcpy(model->mb_types_stats, ff_vp56_def_mb_types_stats, sizeof(model->mb_types_stats)); |
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195 | memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv)); |
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196 | memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv)); |
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197 | memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv)); |
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198 | memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder)); |
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199 | |||
200 | vp6_coeff_order_table_init(s); |
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201 | } |
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202 | |||
203 | static void vp6_parse_vector_models(VP56Context *s) |
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204 | { |
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205 | VP56RangeCoder *c = &s->c; |
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206 | VP56Model *model = s->modelp; |
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207 | int comp, node; |
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208 | |||
209 | for (comp=0; comp<2; comp++) { |
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210 | if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][0])) |
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211 | model->vector_dct[comp] = vp56_rac_gets_nn(c, 7); |
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212 | if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][1])) |
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213 | model->vector_sig[comp] = vp56_rac_gets_nn(c, 7); |
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214 | } |
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215 | |||
216 | for (comp=0; comp<2; comp++) |
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217 | for (node=0; node<7; node++) |
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218 | if (vp56_rac_get_prob(c, vp6_pdv_pct[comp][node])) |
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219 | model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7); |
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220 | |||
221 | for (comp=0; comp<2; comp++) |
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222 | for (node=0; node<8; node++) |
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223 | if (vp56_rac_get_prob(c, vp6_fdv_pct[comp][node])) |
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224 | model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7); |
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225 | } |
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226 | |||
227 | /* nodes must ascend by count, but with descending symbol order */ |
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228 | static int vp6_huff_cmp(const void *va, const void *vb) |
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229 | { |
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230 | const Node *a = va, *b = vb; |
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231 | return (a->count - b->count)*16 + (b->sym - a->sym); |
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232 | } |
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233 | |||
234 | static int vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[], |
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235 | const uint8_t *map, unsigned size, VLC *vlc) |
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236 | { |
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237 | Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size]; |
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238 | int a, b, i; |
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239 | |||
240 | /* first compute probabilities from model */ |
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241 | tmp[0].count = 256; |
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242 | for (i=0; i |
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243 | a = tmp[i].count * coeff_model[i] >> 8; |
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244 | b = tmp[i].count * (255 - coeff_model[i]) >> 8; |
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245 | nodes[map[2*i ]].count = a + !a; |
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246 | nodes[map[2*i+1]].count = b + !b; |
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247 | } |
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248 | |||
249 | ff_free_vlc(vlc); |
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250 | /* then build the huffman tree according to probabilities */ |
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251 | return ff_huff_build_tree(s->avctx, vlc, size, FF_HUFFMAN_BITS, |
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252 | nodes, vp6_huff_cmp, |
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253 | FF_HUFFMAN_FLAG_HNODE_FIRST); |
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254 | } |
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255 | |||
256 | static int vp6_parse_coeff_models(VP56Context *s) |
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257 | { |
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258 | VP56RangeCoder *c = &s->c; |
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259 | VP56Model *model = s->modelp; |
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260 | int def_prob[11]; |
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261 | int node, cg, ctx, pos; |
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262 | int ct; /* code type */ |
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263 | int pt; /* plane type (0 for Y, 1 for U or V) */ |
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264 | |||
265 | memset(def_prob, 0x80, sizeof(def_prob)); |
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266 | |||
267 | for (pt=0; pt<2; pt++) |
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268 | for (node=0; node<11; node++) |
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269 | if (vp56_rac_get_prob(c, vp6_dccv_pct[pt][node])) { |
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270 | def_prob[node] = vp56_rac_gets_nn(c, 7); |
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271 | model->coeff_dccv[pt][node] = def_prob[node]; |
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272 | } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) { |
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273 | model->coeff_dccv[pt][node] = def_prob[node]; |
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274 | } |
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275 | |||
276 | if (vp56_rac_get(c)) { |
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277 | for (pos=1; pos<64; pos++) |
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278 | if (vp56_rac_get_prob(c, vp6_coeff_reorder_pct[pos])) |
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279 | model->coeff_reorder[pos] = vp56_rac_gets(c, 4); |
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280 | vp6_coeff_order_table_init(s); |
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281 | } |
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282 | |||
283 | for (cg=0; cg<2; cg++) |
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284 | for (node=0; node<14; node++) |
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285 | if (vp56_rac_get_prob(c, vp6_runv_pct[cg][node])) |
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286 | model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7); |
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287 | |||
288 | for (ct=0; ct<3; ct++) |
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289 | for (pt=0; pt<2; pt++) |
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290 | for (cg=0; cg<6; cg++) |
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291 | for (node=0; node<11; node++) |
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292 | if (vp56_rac_get_prob(c, vp6_ract_pct[ct][pt][cg][node])) { |
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293 | def_prob[node] = vp56_rac_gets_nn(c, 7); |
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294 | model->coeff_ract[pt][ct][cg][node] = def_prob[node]; |
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295 | } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) { |
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296 | model->coeff_ract[pt][ct][cg][node] = def_prob[node]; |
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297 | } |
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298 | |||
299 | if (s->use_huffman) { |
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300 | for (pt=0; pt<2; pt++) { |
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301 | if (vp6_build_huff_tree(s, model->coeff_dccv[pt], |
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302 | vp6_huff_coeff_map, 12, &s->dccv_vlc[pt])) |
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303 | return -1; |
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304 | if (vp6_build_huff_tree(s, model->coeff_runv[pt], |
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305 | vp6_huff_run_map, 9, &s->runv_vlc[pt])) |
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306 | return -1; |
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307 | for (ct=0; ct<3; ct++) |
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308 | for (cg = 0; cg < 6; cg++) |
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309 | if (vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg], |
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310 | vp6_huff_coeff_map, 12, |
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311 | &s->ract_vlc[pt][ct][cg])) |
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312 | return -1; |
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313 | } |
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314 | memset(s->nb_null, 0, sizeof(s->nb_null)); |
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315 | } else { |
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316 | /* coeff_dcct is a linear combination of coeff_dccv */ |
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317 | for (pt=0; pt<2; pt++) |
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318 | for (ctx=0; ctx<3; ctx++) |
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319 | for (node=0; node<5; node++) |
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320 | model->coeff_dcct[pt][ctx][node] = av_clip(((model->coeff_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255); |
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321 | } |
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322 | return 0; |
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323 | } |
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324 | |||
325 | static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect) |
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326 | { |
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327 | VP56RangeCoder *c = &s->c; |
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328 | VP56Model *model = s->modelp; |
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329 | int comp; |
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330 | |||
331 | *vect = (VP56mv) {0,0}; |
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332 | if (s->vector_candidate_pos < 2) |
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333 | *vect = s->vector_candidate[0]; |
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334 | |||
335 | for (comp=0; comp<2; comp++) { |
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336 | int i, delta = 0; |
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337 | |||
338 | if (vp56_rac_get_prob(c, model->vector_dct[comp])) { |
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339 | static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4}; |
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340 | for (i=0; i |
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341 | int j = prob_order[i]; |
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342 | delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])< |
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343 | } |
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344 | if (delta & 0xF0) |
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345 | delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3; |
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346 | else |
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347 | delta |= 8; |
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348 | } else { |
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349 | delta = vp56_rac_get_tree(c, ff_vp56_pva_tree, |
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350 | model->vector_pdv[comp]); |
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351 | } |
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352 | |||
353 | if (delta && vp56_rac_get_prob(c, model->vector_sig[comp])) |
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354 | delta = -delta; |
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355 | |||
356 | if (!comp) |
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357 | vect->x += delta; |
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358 | else |
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359 | vect->y += delta; |
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360 | } |
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361 | } |
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362 | |||
363 | /** |
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364 | * Read number of consecutive blocks with null DC or AC. |
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365 | * This value is < 74. |
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366 | */ |
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367 | static unsigned vp6_get_nb_null(VP56Context *s) |
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368 | { |
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369 | unsigned val = get_bits(&s->gb, 2); |
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370 | if (val == 2) |
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371 | val += get_bits(&s->gb, 2); |
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372 | else if (val == 3) { |
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373 | val = get_bits1(&s->gb) << 2; |
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374 | val = 6+val + get_bits(&s->gb, 2+val); |
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375 | } |
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376 | return val; |
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377 | } |
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378 | |||
379 | static void vp6_parse_coeff_huffman(VP56Context *s) |
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380 | { |
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381 | VP56Model *model = s->modelp; |
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382 | uint8_t *permute = s->idct_scantable; |
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383 | VLC *vlc_coeff; |
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384 | int coeff, sign, coeff_idx; |
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385 | int b, cg, idx; |
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386 | int pt = 0; /* plane type (0 for Y, 1 for U or V) */ |
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387 | |||
388 | for (b=0; b<6; b++) { |
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389 | int ct = 0; /* code type */ |
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390 | if (b > 3) pt = 1; |
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391 | vlc_coeff = &s->dccv_vlc[pt]; |
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392 | |||
393 | for (coeff_idx = 0;;) { |
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394 | int run = 1; |
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395 | if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) { |
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396 | s->nb_null[coeff_idx][pt]--; |
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397 | if (coeff_idx) |
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398 | break; |
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399 | } else { |
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400 | if (get_bits_left(&s->gb) <= 0) |
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401 | return; |
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402 | coeff = get_vlc2(&s->gb, vlc_coeff->table, FF_HUFFMAN_BITS, 3); |
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403 | if (coeff == 0) { |
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404 | if (coeff_idx) { |
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405 | int pt = (coeff_idx >= 6); |
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406 | run += get_vlc2(&s->gb, s->runv_vlc[pt].table, FF_HUFFMAN_BITS, 3); |
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407 | if (run >= 9) |
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408 | run += get_bits(&s->gb, 6); |
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409 | } else |
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410 | s->nb_null[0][pt] = vp6_get_nb_null(s); |
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411 | ct = 0; |
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412 | } else if (coeff == 11) { /* end of block */ |
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413 | if (coeff_idx == 1) /* first AC coeff ? */ |
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414 | s->nb_null[1][pt] = vp6_get_nb_null(s); |
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415 | break; |
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416 | } else { |
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417 | int coeff2 = ff_vp56_coeff_bias[coeff]; |
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418 | if (coeff > 4) |
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419 | coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11); |
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420 | ct = 1 + (coeff2 > 1); |
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421 | sign = get_bits1(&s->gb); |
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422 | coeff2 = (coeff2 ^ -sign) + sign; |
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423 | if (coeff_idx) |
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424 | coeff2 *= s->dequant_ac; |
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425 | idx = model->coeff_index_to_pos[coeff_idx]; |
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426 | s->block_coeff[b][permute[idx]] = coeff2; |
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427 | } |
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428 | } |
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429 | coeff_idx+=run; |
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430 | if (coeff_idx >= 64) |
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431 | break; |
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432 | cg = FFMIN(vp6_coeff_groups[coeff_idx], 3); |
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433 | vlc_coeff = &s->ract_vlc[pt][ct][cg]; |
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434 | } |
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435 | } |
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436 | } |
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437 | |||
438 | static void vp6_parse_coeff(VP56Context *s) |
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439 | { |
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440 | VP56RangeCoder *c = s->ccp; |
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441 | VP56Model *model = s->modelp; |
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442 | uint8_t *permute = s->idct_scantable; |
||
443 | uint8_t *model1, *model2, *model3; |
||
444 | int coeff, sign, coeff_idx; |
||
445 | int b, i, cg, idx, ctx; |
||
446 | int pt = 0; /* plane type (0 for Y, 1 for U or V) */ |
||
447 | |||
448 | for (b=0; b<6; b++) { |
||
449 | int ct = 1; /* code type */ |
||
450 | int run = 1; |
||
451 | |||
452 | if (b > 3) pt = 1; |
||
453 | |||
454 | ctx = s->left_block[ff_vp56_b6to4[b]].not_null_dc |
||
455 | + s->above_blocks[s->above_block_idx[b]].not_null_dc; |
||
456 | model1 = model->coeff_dccv[pt]; |
||
457 | model2 = model->coeff_dcct[pt][ctx]; |
||
458 | |||
459 | coeff_idx = 0; |
||
460 | for (;;) { |
||
461 | if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) { |
||
462 | /* parse a coeff */ |
||
463 | if (vp56_rac_get_prob(c, model2[2])) { |
||
464 | if (vp56_rac_get_prob(c, model2[3])) { |
||
465 | idx = vp56_rac_get_tree(c, ff_vp56_pc_tree, model1); |
||
466 | coeff = ff_vp56_coeff_bias[idx+5]; |
||
467 | for (i=ff_vp56_coeff_bit_length[idx]; i>=0; i--) |
||
468 | coeff += vp56_rac_get_prob(c, ff_vp56_coeff_parse_table[idx][i]) << i; |
||
469 | } else { |
||
470 | if (vp56_rac_get_prob(c, model2[4])) |
||
471 | coeff = 3 + vp56_rac_get_prob(c, model1[5]); |
||
472 | else |
||
473 | coeff = 2; |
||
474 | } |
||
475 | ct = 2; |
||
476 | } else { |
||
477 | ct = 1; |
||
478 | coeff = 1; |
||
479 | } |
||
480 | sign = vp56_rac_get(c); |
||
481 | coeff = (coeff ^ -sign) + sign; |
||
482 | if (coeff_idx) |
||
483 | coeff *= s->dequant_ac; |
||
484 | idx = model->coeff_index_to_pos[coeff_idx]; |
||
485 | s->block_coeff[b][permute[idx]] = coeff; |
||
486 | run = 1; |
||
487 | } else { |
||
488 | /* parse a run */ |
||
489 | ct = 0; |
||
490 | if (coeff_idx > 0) { |
||
491 | if (!vp56_rac_get_prob(c, model2[1])) |
||
492 | break; |
||
493 | |||
494 | model3 = model->coeff_runv[coeff_idx >= 6]; |
||
495 | run = vp56_rac_get_tree(c, vp6_pcr_tree, model3); |
||
496 | if (!run) |
||
497 | for (run=9, i=0; i<6; i++) |
||
498 | run += vp56_rac_get_prob(c, model3[i+8]) << i; |
||
499 | } |
||
500 | } |
||
501 | coeff_idx += run; |
||
502 | if (coeff_idx >= 64) |
||
503 | break; |
||
504 | cg = vp6_coeff_groups[coeff_idx]; |
||
505 | model1 = model2 = model->coeff_ract[pt][ct][cg]; |
||
506 | } |
||
507 | |||
508 | s->left_block[ff_vp56_b6to4[b]].not_null_dc = |
||
509 | s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0]; |
||
510 | } |
||
511 | } |
||
512 | |||
513 | static int vp6_block_variance(uint8_t *src, int stride) |
||
514 | { |
||
515 | int sum = 0, square_sum = 0; |
||
516 | int y, x; |
||
517 | |||
518 | for (y=0; y<8; y+=2) { |
||
519 | for (x=0; x<8; x+=2) { |
||
520 | sum += src[x]; |
||
521 | square_sum += src[x]*src[x]; |
||
522 | } |
||
523 | src += 2*stride; |
||
524 | } |
||
525 | return (16*square_sum - sum*sum) >> 8; |
||
526 | } |
||
527 | |||
528 | static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride, |
||
529 | int delta, const int16_t *weights) |
||
530 | { |
||
531 | int x, y; |
||
532 | |||
533 | for (y=0; y<8; y++) { |
||
534 | for (x=0; x<8; x++) { |
||
535 | dst[x] = av_clip_uint8(( src[x-delta ] * weights[0] |
||
536 | + src[x ] * weights[1] |
||
537 | + src[x+delta ] * weights[2] |
||
538 | + src[x+2*delta] * weights[3] + 64) >> 7); |
||
539 | } |
||
540 | src += stride; |
||
541 | dst += stride; |
||
542 | } |
||
543 | } |
||
544 | |||
545 | static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src, |
||
546 | int stride, int h_weight, int v_weight) |
||
547 | { |
||
548 | uint8_t *tmp = s->edge_emu_buffer+16; |
||
549 | s->h264chroma.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0); |
||
550 | s->h264chroma.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight); |
||
551 | } |
||
552 | |||
553 | static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src, |
||
554 | int offset1, int offset2, int stride, |
||
555 | VP56mv mv, int mask, int select, int luma) |
||
556 | { |
||
557 | int filter4 = 0; |
||
558 | int x8 = mv.x & mask; |
||
559 | int y8 = mv.y & mask; |
||
560 | |||
561 | if (luma) { |
||
562 | x8 *= 2; |
||
563 | y8 *= 2; |
||
564 | filter4 = s->filter_mode; |
||
565 | if (filter4 == 2) { |
||
566 | if (s->max_vector_length && |
||
567 | (FFABS(mv.x) > s->max_vector_length || |
||
568 | FFABS(mv.y) > s->max_vector_length)) { |
||
569 | filter4 = 0; |
||
570 | } else if (s->sample_variance_threshold |
||
571 | && (vp6_block_variance(src+offset1, stride) |
||
572 | < s->sample_variance_threshold)) { |
||
573 | filter4 = 0; |
||
574 | } |
||
575 | } |
||
576 | } |
||
577 | |||
578 | if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) { |
||
579 | offset1 = offset2; |
||
580 | } |
||
581 | |||
582 | if (filter4) { |
||
583 | if (!y8) { /* left or right combine */ |
||
584 | vp6_filter_hv4(dst, src+offset1, stride, 1, |
||
585 | vp6_block_copy_filter[select][x8]); |
||
586 | } else if (!x8) { /* above or below combine */ |
||
587 | vp6_filter_hv4(dst, src+offset1, stride, stride, |
||
588 | vp6_block_copy_filter[select][y8]); |
||
589 | } else { |
||
590 | s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride, |
||
591 | vp6_block_copy_filter[select][x8], |
||
592 | vp6_block_copy_filter[select][y8]); |
||
593 | } |
||
594 | } else { |
||
595 | if (!x8 || !y8) { |
||
596 | s->h264chroma.put_h264_chroma_pixels_tab[0](dst, src + offset1, stride, 8, x8, y8); |
||
597 | } else { |
||
598 | vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8); |
||
599 | } |
||
600 | } |
||
601 | } |
||
602 | |||
603 | static av_cold void vp6_decode_init_context(VP56Context *s); |
||
604 | |||
605 | static av_cold int vp6_decode_init(AVCodecContext *avctx) |
||
606 | { |
||
607 | VP56Context *s = avctx->priv_data; |
||
608 | int ret; |
||
609 | |||
610 | if ((ret = ff_vp56_init(avctx, avctx->codec->id == AV_CODEC_ID_VP6, |
||
611 | avctx->codec->id == AV_CODEC_ID_VP6A)) < 0) |
||
612 | return ret; |
||
613 | |||
614 | vp6_decode_init_context(s); |
||
615 | |||
616 | if (s->has_alpha) { |
||
617 | s->alpha_context = av_mallocz(sizeof(VP56Context)); |
||
618 | ff_vp56_init_context(avctx, s->alpha_context, |
||
619 | s->flip == -1, s->has_alpha); |
||
620 | vp6_decode_init_context(s->alpha_context); |
||
621 | } |
||
622 | |||
623 | return 0; |
||
624 | } |
||
625 | |||
626 | static av_cold void vp6_decode_init_context(VP56Context *s) |
||
627 | { |
||
628 | s->deblock_filtering = 0; |
||
629 | s->vp56_coord_div = vp6_coord_div; |
||
630 | s->parse_vector_adjustment = vp6_parse_vector_adjustment; |
||
631 | s->filter = vp6_filter; |
||
632 | s->default_models_init = vp6_default_models_init; |
||
633 | s->parse_vector_models = vp6_parse_vector_models; |
||
634 | s->parse_coeff_models = vp6_parse_coeff_models; |
||
635 | s->parse_header = vp6_parse_header; |
||
636 | } |
||
637 | |||
638 | static av_cold void vp6_decode_free_context(VP56Context *s); |
||
639 | |||
640 | static av_cold int vp6_decode_free(AVCodecContext *avctx) |
||
641 | { |
||
642 | VP56Context *s = avctx->priv_data; |
||
643 | |||
644 | ff_vp56_free(avctx); |
||
645 | vp6_decode_free_context(s); |
||
646 | |||
647 | if (s->alpha_context) { |
||
648 | ff_vp56_free_context(s->alpha_context); |
||
649 | vp6_decode_free_context(s->alpha_context); |
||
650 | av_free(s->alpha_context); |
||
651 | } |
||
652 | |||
653 | return 0; |
||
654 | } |
||
655 | |||
656 | static av_cold void vp6_decode_free_context(VP56Context *s) |
||
657 | { |
||
658 | int pt, ct, cg; |
||
659 | |||
660 | for (pt=0; pt<2; pt++) { |
||
661 | ff_free_vlc(&s->dccv_vlc[pt]); |
||
662 | ff_free_vlc(&s->runv_vlc[pt]); |
||
663 | for (ct=0; ct<3; ct++) |
||
664 | for (cg=0; cg<6; cg++) |
||
665 | ff_free_vlc(&s->ract_vlc[pt][ct][cg]); |
||
666 | } |
||
667 | } |
||
668 | |||
669 | AVCodec ff_vp6_decoder = { |
||
670 | .name = "vp6", |
||
671 | .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"), |
||
672 | .type = AVMEDIA_TYPE_VIDEO, |
||
673 | .id = AV_CODEC_ID_VP6, |
||
674 | .priv_data_size = sizeof(VP56Context), |
||
675 | .init = vp6_decode_init, |
||
676 | .close = vp6_decode_free, |
||
677 | .decode = ff_vp56_decode_frame, |
||
678 | .capabilities = CODEC_CAP_DR1, |
||
679 | }; |
||
680 | |||
681 | /* flash version, not flipped upside-down */ |
||
682 | AVCodec ff_vp6f_decoder = { |
||
683 | .name = "vp6f", |
||
684 | .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"), |
||
685 | .type = AVMEDIA_TYPE_VIDEO, |
||
686 | .id = AV_CODEC_ID_VP6F, |
||
687 | .priv_data_size = sizeof(VP56Context), |
||
688 | .init = vp6_decode_init, |
||
689 | .close = vp6_decode_free, |
||
690 | .decode = ff_vp56_decode_frame, |
||
691 | .capabilities = CODEC_CAP_DR1, |
||
692 | }; |
||
693 | |||
694 | /* flash version, not flipped upside-down, with alpha channel */ |
||
695 | AVCodec ff_vp6a_decoder = { |
||
696 | .name = "vp6a", |
||
697 | .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"), |
||
698 | .type = AVMEDIA_TYPE_VIDEO, |
||
699 | .id = AV_CODEC_ID_VP6A, |
||
700 | .priv_data_size = sizeof(VP56Context), |
||
701 | .init = vp6_decode_init, |
||
702 | .close = vp6_decode_free, |
||
703 | .decode = ff_vp56_decode_frame, |
||
704 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, |
||
705 | };6;>3;>2;>>0)>>8;>8;>8;>8;>><>6;>><>6;>=>=>2>6;>><>>3; |