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6148 | serge | 1 | /* |
2 | * VP8 compatible video decoder |
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3 | * |
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4 | * Copyright (C) 2010 David Conrad |
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5 | * Copyright (C) 2010 Ronald S. Bultje |
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6 | * Copyright (C) 2010 Jason Garrett-Glaser |
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7 | * Copyright (C) 2012 Daniel Kang |
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8 | * |
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9 | * This file is part of FFmpeg. |
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10 | * |
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11 | * FFmpeg 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 | * FFmpeg 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 | |||
26 | #ifndef AVCODEC_VP8_H |
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27 | #define AVCODEC_VP8_H |
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28 | |||
29 | #include "libavutil/buffer.h" |
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30 | |||
31 | #include "vp56.h" |
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32 | #include "vp8dsp.h" |
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33 | #include "h264pred.h" |
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34 | #include "thread.h" |
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35 | #if HAVE_PTHREADS |
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36 | #include |
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37 | #elif HAVE_OS2THREADS |
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38 | #include "compat/os2threads.h" |
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39 | #elif HAVE_W32THREADS |
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40 | #include "compat/w32pthreads.h" |
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41 | #endif |
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42 | |||
43 | #define VP8_MAX_QUANT 127 |
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44 | |||
45 | enum dct_token { |
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46 | DCT_0, |
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47 | DCT_1, |
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48 | DCT_2, |
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49 | DCT_3, |
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50 | DCT_4, |
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51 | DCT_CAT1, |
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52 | DCT_CAT2, |
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53 | DCT_CAT3, |
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54 | DCT_CAT4, |
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55 | DCT_CAT5, |
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56 | DCT_CAT6, |
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57 | DCT_EOB, |
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58 | |||
59 | NUM_DCT_TOKENS |
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60 | }; |
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61 | |||
62 | // used to signal 4x4 intra pred in luma MBs |
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63 | #define MODE_I4x4 4 |
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64 | |||
65 | enum inter_mvmode { |
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66 | VP8_MVMODE_ZERO = MODE_I4x4 + 1, |
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67 | VP8_MVMODE_MV, |
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68 | VP8_MVMODE_SPLIT |
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69 | }; |
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70 | |||
71 | enum inter_splitmvmode { |
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72 | VP8_SPLITMVMODE_16x8 = 0, ///< 2 16x8 blocks (vertical) |
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73 | VP8_SPLITMVMODE_8x16, ///< 2 8x16 blocks (horizontal) |
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74 | VP8_SPLITMVMODE_8x8, ///< 2x2 blocks of 8x8px each |
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75 | VP8_SPLITMVMODE_4x4, ///< 4x4 blocks of 4x4px each |
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76 | VP8_SPLITMVMODE_NONE, ///< (only used in prediction) no split MVs |
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77 | }; |
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78 | |||
79 | typedef struct VP8FilterStrength { |
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80 | uint8_t filter_level; |
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81 | uint8_t inner_limit; |
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82 | uint8_t inner_filter; |
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83 | } VP8FilterStrength; |
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84 | |||
85 | typedef struct VP8Macroblock { |
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86 | uint8_t skip; |
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87 | // todo: make it possible to check for at least (i4x4 or split_mv) |
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88 | // in one op. are others needed? |
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89 | uint8_t mode; |
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90 | uint8_t ref_frame; |
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91 | uint8_t partitioning; |
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92 | uint8_t chroma_pred_mode; |
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93 | uint8_t segment; |
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94 | uint8_t intra4x4_pred_mode_mb[16]; |
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95 | uint8_t intra4x4_pred_mode_top[4]; |
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96 | VP56mv mv; |
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97 | VP56mv bmv[16]; |
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98 | } VP8Macroblock; |
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99 | |||
100 | typedef struct VP8ThreadData { |
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101 | DECLARE_ALIGNED(16, int16_t, block)[6][4][16]; |
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102 | DECLARE_ALIGNED(16, int16_t, block_dc)[16]; |
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103 | /** |
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104 | * This is the index plus one of the last non-zero coeff |
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105 | * for each of the blocks in the current macroblock. |
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106 | * So, 0 -> no coeffs |
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107 | * 1 -> dc-only (special transform) |
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108 | * 2+-> full transform |
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109 | */ |
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110 | DECLARE_ALIGNED(16, uint8_t, non_zero_count_cache)[6][4]; |
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111 | /** |
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112 | * For coeff decode, we need to know whether the above block had non-zero |
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113 | * coefficients. This means for each macroblock, we need data for 4 luma |
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114 | * blocks, 2 u blocks, 2 v blocks, and the luma dc block, for a total of 9 |
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115 | * per macroblock. We keep the last row in top_nnz. |
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116 | */ |
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117 | DECLARE_ALIGNED(8, uint8_t, left_nnz)[9]; |
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118 | int thread_nr; |
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119 | #if HAVE_THREADS |
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120 | pthread_mutex_t lock; |
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121 | pthread_cond_t cond; |
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122 | #endif |
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123 | int thread_mb_pos; // (mb_y << 16) | (mb_x & 0xFFFF) |
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124 | int wait_mb_pos; // What the current thread is waiting on. |
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125 | DECLARE_ALIGNED(16, uint8_t, edge_emu_buffer)[21*32]; |
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126 | VP8FilterStrength *filter_strength; |
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127 | } VP8ThreadData; |
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128 | |||
129 | typedef struct VP8Frame { |
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130 | ThreadFrame tf; |
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131 | AVBufferRef *seg_map; |
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132 | } VP8Frame; |
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133 | |||
134 | #define MAX_THREADS 8 |
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135 | typedef struct VP8Context { |
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136 | VP8ThreadData *thread_data; |
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137 | AVCodecContext *avctx; |
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138 | VP8Frame *framep[4]; |
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139 | VP8Frame *next_framep[4]; |
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140 | VP8Frame *curframe; |
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141 | VP8Frame *prev_frame; |
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142 | |||
143 | uint16_t mb_width; /* number of horizontal MB */ |
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144 | uint16_t mb_height; /* number of vertical MB */ |
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145 | int linesize; |
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146 | int uvlinesize; |
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147 | |||
148 | uint8_t keyframe; |
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149 | uint8_t deblock_filter; |
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150 | uint8_t mbskip_enabled; |
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151 | uint8_t profile; |
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152 | VP56mv mv_min; |
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153 | VP56mv mv_max; |
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154 | |||
155 | int8_t sign_bias[4]; ///< one state [0, 1] per ref frame type |
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156 | int ref_count[3]; |
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157 | |||
158 | /** |
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159 | * Base parameters for segmentation, i.e. per-macroblock parameters. |
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160 | * These must be kept unchanged even if segmentation is not used for |
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161 | * a frame, since the values persist between interframes. |
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162 | */ |
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163 | struct { |
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164 | uint8_t enabled; |
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165 | uint8_t absolute_vals; |
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166 | uint8_t update_map; |
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167 | int8_t base_quant[4]; |
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168 | int8_t filter_level[4]; ///< base loop filter level |
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169 | } segmentation; |
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170 | |||
171 | struct { |
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172 | uint8_t simple; |
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173 | uint8_t level; |
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174 | uint8_t sharpness; |
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175 | } filter; |
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176 | |||
177 | VP8Macroblock *macroblocks; |
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178 | |||
179 | uint8_t *intra4x4_pred_mode_top; |
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180 | uint8_t intra4x4_pred_mode_left[4]; |
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181 | |||
182 | /** |
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183 | * Macroblocks can have one of 4 different quants in a frame when |
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184 | * segmentation is enabled. |
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185 | * If segmentation is disabled, only the first segment's values are used. |
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186 | */ |
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187 | struct { |
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188 | // [0] - DC qmul [1] - AC qmul |
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189 | int16_t luma_qmul[2]; |
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190 | int16_t luma_dc_qmul[2]; ///< luma dc-only block quant |
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191 | int16_t chroma_qmul[2]; |
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192 | } qmat[4]; |
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193 | |||
194 | struct { |
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195 | uint8_t enabled; ///< whether each mb can have a different strength based on mode/ref |
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196 | |||
197 | /** |
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198 | * filter strength adjustment for the following macroblock modes: |
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199 | * [0-3] - i16x16 (always zero) |
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200 | * [4] - i4x4 |
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201 | * [5] - zero mv |
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202 | * [6] - inter modes except for zero or split mv |
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203 | * [7] - split mv |
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204 | * i16x16 modes never have any adjustment |
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205 | */ |
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206 | int8_t mode[VP8_MVMODE_SPLIT+1]; |
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207 | |||
208 | /** |
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209 | * filter strength adjustment for macroblocks that reference: |
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210 | * [0] - intra / VP56_FRAME_CURRENT |
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211 | * [1] - VP56_FRAME_PREVIOUS |
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212 | * [2] - VP56_FRAME_GOLDEN |
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213 | * [3] - altref / VP56_FRAME_GOLDEN2 |
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214 | */ |
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215 | int8_t ref[4]; |
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216 | } lf_delta; |
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217 | |||
218 | uint8_t (*top_border)[16+8+8]; |
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219 | uint8_t (*top_nnz)[9]; |
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220 | |||
221 | VP56RangeCoder c; ///< header context, includes mb modes and motion vectors |
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222 | |||
223 | /** |
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224 | * These are all of the updatable probabilities for binary decisions. |
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225 | * They are only implictly reset on keyframes, making it quite likely |
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226 | * for an interframe to desync if a prior frame's header was corrupt |
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227 | * or missing outright! |
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228 | */ |
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229 | struct { |
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230 | uint8_t segmentid[3]; |
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231 | uint8_t mbskip; |
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232 | uint8_t intra; |
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233 | uint8_t last; |
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234 | uint8_t golden; |
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235 | uint8_t pred16x16[4]; |
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236 | uint8_t pred8x8c[3]; |
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237 | uint8_t token[4][16][3][NUM_DCT_TOKENS-1]; |
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238 | uint8_t mvc[2][19]; |
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239 | } prob[2]; |
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240 | |||
241 | VP8Macroblock *macroblocks_base; |
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242 | int invisible; |
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243 | int update_last; ///< update VP56_FRAME_PREVIOUS with the current one |
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244 | int update_golden; ///< VP56_FRAME_NONE if not updated, or which frame to copy if so |
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245 | int update_altref; |
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246 | |||
247 | /** |
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248 | * If this flag is not set, all the probability updates |
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249 | * are discarded after this frame is decoded. |
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250 | */ |
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251 | int update_probabilities; |
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252 | |||
253 | /** |
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254 | * All coefficients are contained in separate arith coding contexts. |
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255 | * There can be 1, 2, 4, or 8 of these after the header context. |
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256 | */ |
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257 | int num_coeff_partitions; |
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258 | VP56RangeCoder coeff_partition[8]; |
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259 | VideoDSPContext vdsp; |
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260 | VP8DSPContext vp8dsp; |
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261 | H264PredContext hpc; |
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262 | vp8_mc_func put_pixels_tab[3][3][3]; |
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263 | VP8Frame frames[5]; |
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264 | |||
265 | int num_jobs; |
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266 | /** |
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267 | * This describes the macroblock memory layout. |
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268 | * 0 -> Only width+height*2+1 macroblocks allocated (frame/single thread). |
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269 | * 1 -> Macroblocks for entire frame alloced (sliced thread). |
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270 | */ |
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271 | int mb_layout; |
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272 | } VP8Context; |
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273 | |||
274 | int ff_vp8_decode_init(AVCodecContext *avctx); |
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275 | |||
276 | int ff_vp8_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
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277 | AVPacket *avpkt); |
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278 | |||
279 | int ff_vp8_decode_free(AVCodecContext *avctx); |
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280 | |||
281 | #endif /* AVCODEC_VP8_H */>>>>>>>><>>>>>> |