| 1 | /* |
| 2 | * H.26L/H.264/AVC/JVT/14496-10/... cavlc bitstream decoding |
| 3 | * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * H.264 / AVC / MPEG4 part10 cavlc bitstream decoding. |
| 25 | * @author Michael Niedermayer <michaelni@gmx.at> |
| 26 | */ |
| 27 | |
| 28 | #define CABAC(h) 0 |
| 29 | #define UNCHECKED_BITSTREAM_READER 1 |
| 30 | |
| 31 | #include "internal.h" |
| 32 | #include "avcodec.h" |
| 33 | #include "h264.h" |
| 34 | #include "h264data.h" // FIXME FIXME FIXME |
| 35 | #include "h264_mvpred.h" |
| 36 | #include "golomb.h" |
| 37 | #include "mpegutils.h" |
| 38 | #include "libavutil/avassert.h" |
| 39 | |
| 40 | |
| 41 | static const uint8_t golomb_to_inter_cbp_gray[16]={ |
| 42 | 0, 1, 2, 4, 8, 3, 5,10,12,15, 7,11,13,14, 6, 9, |
| 43 | }; |
| 44 | |
| 45 | static const uint8_t golomb_to_intra4x4_cbp_gray[16]={ |
| 46 | 15, 0, 7,11,13,14, 3, 5,10,12, 1, 2, 4, 8, 6, 9, |
| 47 | }; |
| 48 | |
| 49 | static const uint8_t chroma_dc_coeff_token_len[4*5]={ |
| 50 | 2, 0, 0, 0, |
| 51 | 6, 1, 0, 0, |
| 52 | 6, 6, 3, 0, |
| 53 | 6, 7, 7, 6, |
| 54 | 6, 8, 8, 7, |
| 55 | }; |
| 56 | |
| 57 | static const uint8_t chroma_dc_coeff_token_bits[4*5]={ |
| 58 | 1, 0, 0, 0, |
| 59 | 7, 1, 0, 0, |
| 60 | 4, 6, 1, 0, |
| 61 | 3, 3, 2, 5, |
| 62 | 2, 3, 2, 0, |
| 63 | }; |
| 64 | |
| 65 | static const uint8_t chroma422_dc_coeff_token_len[4*9]={ |
| 66 | 1, 0, 0, 0, |
| 67 | 7, 2, 0, 0, |
| 68 | 7, 7, 3, 0, |
| 69 | 9, 7, 7, 5, |
| 70 | 9, 9, 7, 6, |
| 71 | 10, 10, 9, 7, |
| 72 | 11, 11, 10, 7, |
| 73 | 12, 12, 11, 10, |
| 74 | 13, 12, 12, 11, |
| 75 | }; |
| 76 | |
| 77 | static const uint8_t chroma422_dc_coeff_token_bits[4*9]={ |
| 78 | 1, 0, 0, 0, |
| 79 | 15, 1, 0, 0, |
| 80 | 14, 13, 1, 0, |
| 81 | 7, 12, 11, 1, |
| 82 | 6, 5, 10, 1, |
| 83 | 7, 6, 4, 9, |
| 84 | 7, 6, 5, 8, |
| 85 | 7, 6, 5, 4, |
| 86 | 7, 5, 4, 4, |
| 87 | }; |
| 88 | |
| 89 | static const uint8_t coeff_token_len[4][4*17]={ |
| 90 | { |
| 91 | 1, 0, 0, 0, |
| 92 | 6, 2, 0, 0, 8, 6, 3, 0, 9, 8, 7, 5, 10, 9, 8, 6, |
| 93 | 11,10, 9, 7, 13,11,10, 8, 13,13,11, 9, 13,13,13,10, |
| 94 | 14,14,13,11, 14,14,14,13, 15,15,14,14, 15,15,15,14, |
| 95 | 16,15,15,15, 16,16,16,15, 16,16,16,16, 16,16,16,16, |
| 96 | }, |
| 97 | { |
| 98 | 2, 0, 0, 0, |
| 99 | 6, 2, 0, 0, 6, 5, 3, 0, 7, 6, 6, 4, 8, 6, 6, 4, |
| 100 | 8, 7, 7, 5, 9, 8, 8, 6, 11, 9, 9, 6, 11,11,11, 7, |
| 101 | 12,11,11, 9, 12,12,12,11, 12,12,12,11, 13,13,13,12, |
| 102 | 13,13,13,13, 13,14,13,13, 14,14,14,13, 14,14,14,14, |
| 103 | }, |
| 104 | { |
| 105 | 4, 0, 0, 0, |
| 106 | 6, 4, 0, 0, 6, 5, 4, 0, 6, 5, 5, 4, 7, 5, 5, 4, |
| 107 | 7, 5, 5, 4, 7, 6, 6, 4, 7, 6, 6, 4, 8, 7, 7, 5, |
| 108 | 8, 8, 7, 6, 9, 8, 8, 7, 9, 9, 8, 8, 9, 9, 9, 8, |
| 109 | 10, 9, 9, 9, 10,10,10,10, 10,10,10,10, 10,10,10,10, |
| 110 | }, |
| 111 | { |
| 112 | 6, 0, 0, 0, |
| 113 | 6, 6, 0, 0, 6, 6, 6, 0, 6, 6, 6, 6, 6, 6, 6, 6, |
| 114 | 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
| 115 | 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
| 116 | 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, |
| 117 | } |
| 118 | }; |
| 119 | |
| 120 | static const uint8_t coeff_token_bits[4][4*17]={ |
| 121 | { |
| 122 | 1, 0, 0, 0, |
| 123 | 5, 1, 0, 0, 7, 4, 1, 0, 7, 6, 5, 3, 7, 6, 5, 3, |
| 124 | 7, 6, 5, 4, 15, 6, 5, 4, 11,14, 5, 4, 8,10,13, 4, |
| 125 | 15,14, 9, 4, 11,10,13,12, 15,14, 9,12, 11,10,13, 8, |
| 126 | 15, 1, 9,12, 11,14,13, 8, 7,10, 9,12, 4, 6, 5, 8, |
| 127 | }, |
| 128 | { |
| 129 | 3, 0, 0, 0, |
| 130 | 11, 2, 0, 0, 7, 7, 3, 0, 7,10, 9, 5, 7, 6, 5, 4, |
| 131 | 4, 6, 5, 6, 7, 6, 5, 8, 15, 6, 5, 4, 11,14,13, 4, |
| 132 | 15,10, 9, 4, 11,14,13,12, 8,10, 9, 8, 15,14,13,12, |
| 133 | 11,10, 9,12, 7,11, 6, 8, 9, 8,10, 1, 7, 6, 5, 4, |
| 134 | }, |
| 135 | { |
| 136 | 15, 0, 0, 0, |
| 137 | 15,14, 0, 0, 11,15,13, 0, 8,12,14,12, 15,10,11,11, |
| 138 | 11, 8, 9,10, 9,14,13, 9, 8,10, 9, 8, 15,14,13,13, |
| 139 | 11,14,10,12, 15,10,13,12, 11,14, 9,12, 8,10,13, 8, |
| 140 | 13, 7, 9,12, 9,12,11,10, 5, 8, 7, 6, 1, 4, 3, 2, |
| 141 | }, |
| 142 | { |
| 143 | 3, 0, 0, 0, |
| 144 | 0, 1, 0, 0, 4, 5, 6, 0, 8, 9,10,11, 12,13,14,15, |
| 145 | 16,17,18,19, 20,21,22,23, 24,25,26,27, 28,29,30,31, |
| 146 | 32,33,34,35, 36,37,38,39, 40,41,42,43, 44,45,46,47, |
| 147 | 48,49,50,51, 52,53,54,55, 56,57,58,59, 60,61,62,63, |
| 148 | } |
| 149 | }; |
| 150 | |
| 151 | static const uint8_t total_zeros_len[16][16]= { |
| 152 | {1,3,3,4,4,5,5,6,6,7,7,8,8,9,9,9}, |
| 153 | {3,3,3,3,3,4,4,4,4,5,5,6,6,6,6}, |
| 154 | {4,3,3,3,4,4,3,3,4,5,5,6,5,6}, |
| 155 | {5,3,4,4,3,3,3,4,3,4,5,5,5}, |
| 156 | {4,4,4,3,3,3,3,3,4,5,4,5}, |
| 157 | {6,5,3,3,3,3,3,3,4,3,6}, |
| 158 | {6,5,3,3,3,2,3,4,3,6}, |
| 159 | {6,4,5,3,2,2,3,3,6}, |
| 160 | {6,6,4,2,2,3,2,5}, |
| 161 | {5,5,3,2,2,2,4}, |
| 162 | {4,4,3,3,1,3}, |
| 163 | {4,4,2,1,3}, |
| 164 | {3,3,1,2}, |
| 165 | {2,2,1}, |
| 166 | {1,1}, |
| 167 | }; |
| 168 | |
| 169 | static const uint8_t total_zeros_bits[16][16]= { |
| 170 | {1,3,2,3,2,3,2,3,2,3,2,3,2,3,2,1}, |
| 171 | {7,6,5,4,3,5,4,3,2,3,2,3,2,1,0}, |
| 172 | {5,7,6,5,4,3,4,3,2,3,2,1,1,0}, |
| 173 | {3,7,5,4,6,5,4,3,3,2,2,1,0}, |
| 174 | {5,4,3,7,6,5,4,3,2,1,1,0}, |
| 175 | {1,1,7,6,5,4,3,2,1,1,0}, |
| 176 | {1,1,5,4,3,3,2,1,1,0}, |
| 177 | {1,1,1,3,3,2,2,1,0}, |
| 178 | {1,0,1,3,2,1,1,1}, |
| 179 | {1,0,1,3,2,1,1}, |
| 180 | {0,1,1,2,1,3}, |
| 181 | {0,1,1,1,1}, |
| 182 | {0,1,1,1}, |
| 183 | {0,1,1}, |
| 184 | {0,1}, |
| 185 | }; |
| 186 | |
| 187 | static const uint8_t chroma_dc_total_zeros_len[3][4]= { |
| 188 | { 1, 2, 3, 3,}, |
| 189 | { 1, 2, 2, 0,}, |
| 190 | { 1, 1, 0, 0,}, |
| 191 | }; |
| 192 | |
| 193 | static const uint8_t chroma_dc_total_zeros_bits[3][4]= { |
| 194 | { 1, 1, 1, 0,}, |
| 195 | { 1, 1, 0, 0,}, |
| 196 | { 1, 0, 0, 0,}, |
| 197 | }; |
| 198 | |
| 199 | static const uint8_t chroma422_dc_total_zeros_len[7][8]= { |
| 200 | { 1, 3, 3, 4, 4, 4, 5, 5 }, |
| 201 | { 3, 2, 3, 3, 3, 3, 3 }, |
| 202 | { 3, 3, 2, 2, 3, 3 }, |
| 203 | { 3, 2, 2, 2, 3 }, |
| 204 | { 2, 2, 2, 2 }, |
| 205 | { 2, 2, 1 }, |
| 206 | { 1, 1 }, |
| 207 | }; |
| 208 | |
| 209 | static const uint8_t chroma422_dc_total_zeros_bits[7][8]= { |
| 210 | { 1, 2, 3, 2, 3, 1, 1, 0 }, |
| 211 | { 0, 1, 1, 4, 5, 6, 7 }, |
| 212 | { 0, 1, 1, 2, 6, 7 }, |
| 213 | { 6, 0, 1, 2, 7 }, |
| 214 | { 0, 1, 2, 3 }, |
| 215 | { 0, 1, 1 }, |
| 216 | { 0, 1 }, |
| 217 | }; |
| 218 | |
| 219 | static const uint8_t run_len[7][16]={ |
| 220 | {1,1}, |
| 221 | {1,2,2}, |
| 222 | {2,2,2,2}, |
| 223 | {2,2,2,3,3}, |
| 224 | {2,2,3,3,3,3}, |
| 225 | {2,3,3,3,3,3,3}, |
| 226 | {3,3,3,3,3,3,3,4,5,6,7,8,9,10,11}, |
| 227 | }; |
| 228 | |
| 229 | static const uint8_t run_bits[7][16]={ |
| 230 | {1,0}, |
| 231 | {1,1,0}, |
| 232 | {3,2,1,0}, |
| 233 | {3,2,1,1,0}, |
| 234 | {3,2,3,2,1,0}, |
| 235 | {3,0,1,3,2,5,4}, |
| 236 | {7,6,5,4,3,2,1,1,1,1,1,1,1,1,1}, |
| 237 | }; |
| 238 | |
| 239 | static VLC coeff_token_vlc[4]; |
| 240 | static VLC_TYPE coeff_token_vlc_tables[520+332+280+256][2]; |
| 241 | static const int coeff_token_vlc_tables_size[4]={520,332,280,256}; |
| 242 | |
| 243 | static VLC chroma_dc_coeff_token_vlc; |
| 244 | static VLC_TYPE chroma_dc_coeff_token_vlc_table[256][2]; |
| 245 | static const int chroma_dc_coeff_token_vlc_table_size = 256; |
| 246 | |
| 247 | static VLC chroma422_dc_coeff_token_vlc; |
| 248 | static VLC_TYPE chroma422_dc_coeff_token_vlc_table[8192][2]; |
| 249 | static const int chroma422_dc_coeff_token_vlc_table_size = 8192; |
| 250 | |
| 251 | static VLC total_zeros_vlc[15]; |
| 252 | static VLC_TYPE total_zeros_vlc_tables[15][512][2]; |
| 253 | static const int total_zeros_vlc_tables_size = 512; |
| 254 | |
| 255 | static VLC chroma_dc_total_zeros_vlc[3]; |
| 256 | static VLC_TYPE chroma_dc_total_zeros_vlc_tables[3][8][2]; |
| 257 | static const int chroma_dc_total_zeros_vlc_tables_size = 8; |
| 258 | |
| 259 | static VLC chroma422_dc_total_zeros_vlc[7]; |
| 260 | static VLC_TYPE chroma422_dc_total_zeros_vlc_tables[7][32][2]; |
| 261 | static const int chroma422_dc_total_zeros_vlc_tables_size = 32; |
| 262 | |
| 263 | static VLC run_vlc[6]; |
| 264 | static VLC_TYPE run_vlc_tables[6][8][2]; |
| 265 | static const int run_vlc_tables_size = 8; |
| 266 | |
| 267 | static VLC run7_vlc; |
| 268 | static VLC_TYPE run7_vlc_table[96][2]; |
| 269 | static const int run7_vlc_table_size = 96; |
| 270 | |
| 271 | #define LEVEL_TAB_BITS 8 |
| 272 | static int8_t cavlc_level_tab[7][1<<LEVEL_TAB_BITS][2]; |
| 273 | |
| 274 | #define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8 |
| 275 | #define CHROMA422_DC_COEFF_TOKEN_VLC_BITS 13 |
| 276 | #define COEFF_TOKEN_VLC_BITS 8 |
| 277 | #define TOTAL_ZEROS_VLC_BITS 9 |
| 278 | #define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3 |
| 279 | #define CHROMA422_DC_TOTAL_ZEROS_VLC_BITS 5 |
| 280 | #define RUN_VLC_BITS 3 |
| 281 | #define RUN7_VLC_BITS 6 |
| 282 | |
| 283 | /** |
| 284 | * Get the predicted number of non-zero coefficients. |
| 285 | * @param n block index |
| 286 | */ |
| 287 | static inline int pred_non_zero_count(H264Context *h, int n){ |
| 288 | const int index8= scan8[n]; |
| 289 | const int left= h->non_zero_count_cache[index8 - 1]; |
| 290 | const int top = h->non_zero_count_cache[index8 - 8]; |
| 291 | int i= left + top; |
| 292 | |
| 293 | if(i<64) i= (i+1)>>1; |
| 294 | |
| 295 | tprintf(h->avctx, "pred_nnz L%X T%X n%d s%d P%X\n", left, top, n, scan8[n], i&31); |
| 296 | |
| 297 | return i&31; |
| 298 | } |
| 299 | |
| 300 | static av_cold void init_cavlc_level_tab(void){ |
| 301 | int suffix_length; |
| 302 | unsigned int i; |
| 303 | |
| 304 | for(suffix_length=0; suffix_length<7; suffix_length++){ |
| 305 | for(i=0; i<(1<<LEVEL_TAB_BITS); i++){ |
| 306 | int prefix= LEVEL_TAB_BITS - av_log2(2*i); |
| 307 | |
| 308 | if(prefix + 1 + suffix_length <= LEVEL_TAB_BITS){ |
| 309 | int level_code = (prefix << suffix_length) + |
| 310 | (i >> (av_log2(i) - suffix_length)) - (1 << suffix_length); |
| 311 | int mask = -(level_code&1); |
| 312 | level_code = (((2 + level_code) >> 1) ^ mask) - mask; |
| 313 | cavlc_level_tab[suffix_length][i][0]= level_code; |
| 314 | cavlc_level_tab[suffix_length][i][1]= prefix + 1 + suffix_length; |
| 315 | }else if(prefix + 1 <= LEVEL_TAB_BITS){ |
| 316 | cavlc_level_tab[suffix_length][i][0]= prefix+100; |
| 317 | cavlc_level_tab[suffix_length][i][1]= prefix + 1; |
| 318 | }else{ |
| 319 | cavlc_level_tab[suffix_length][i][0]= LEVEL_TAB_BITS+100; |
| 320 | cavlc_level_tab[suffix_length][i][1]= LEVEL_TAB_BITS; |
| 321 | } |
| 322 | } |
| 323 | } |
| 324 | } |
| 325 | |
| 326 | av_cold void ff_h264_decode_init_vlc(void){ |
| 327 | static int done = 0; |
| 328 | |
| 329 | if (!done) { |
| 330 | int i; |
| 331 | int offset; |
| 332 | done = 1; |
| 333 | |
| 334 | chroma_dc_coeff_token_vlc.table = chroma_dc_coeff_token_vlc_table; |
| 335 | chroma_dc_coeff_token_vlc.table_allocated = chroma_dc_coeff_token_vlc_table_size; |
| 336 | init_vlc(&chroma_dc_coeff_token_vlc, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 4*5, |
| 337 | &chroma_dc_coeff_token_len [0], 1, 1, |
| 338 | &chroma_dc_coeff_token_bits[0], 1, 1, |
| 339 | INIT_VLC_USE_NEW_STATIC); |
| 340 | |
| 341 | chroma422_dc_coeff_token_vlc.table = chroma422_dc_coeff_token_vlc_table; |
| 342 | chroma422_dc_coeff_token_vlc.table_allocated = chroma422_dc_coeff_token_vlc_table_size; |
| 343 | init_vlc(&chroma422_dc_coeff_token_vlc, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 4*9, |
| 344 | &chroma422_dc_coeff_token_len [0], 1, 1, |
| 345 | &chroma422_dc_coeff_token_bits[0], 1, 1, |
| 346 | INIT_VLC_USE_NEW_STATIC); |
| 347 | |
| 348 | offset = 0; |
| 349 | for(i=0; i<4; i++){ |
| 350 | coeff_token_vlc[i].table = coeff_token_vlc_tables+offset; |
| 351 | coeff_token_vlc[i].table_allocated = coeff_token_vlc_tables_size[i]; |
| 352 | init_vlc(&coeff_token_vlc[i], COEFF_TOKEN_VLC_BITS, 4*17, |
| 353 | &coeff_token_len [i][0], 1, 1, |
| 354 | &coeff_token_bits[i][0], 1, 1, |
| 355 | INIT_VLC_USE_NEW_STATIC); |
| 356 | offset += coeff_token_vlc_tables_size[i]; |
| 357 | } |
| 358 | /* |
| 359 | * This is a one time safety check to make sure that |
| 360 | * the packed static coeff_token_vlc table sizes |
| 361 | * were initialized correctly. |
| 362 | */ |
| 363 | av_assert0(offset == FF_ARRAY_ELEMS(coeff_token_vlc_tables)); |
| 364 | |
| 365 | for(i=0; i<3; i++){ |
| 366 | chroma_dc_total_zeros_vlc[i].table = chroma_dc_total_zeros_vlc_tables[i]; |
| 367 | chroma_dc_total_zeros_vlc[i].table_allocated = chroma_dc_total_zeros_vlc_tables_size; |
| 368 | init_vlc(&chroma_dc_total_zeros_vlc[i], |
| 369 | CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 4, |
| 370 | &chroma_dc_total_zeros_len [i][0], 1, 1, |
| 371 | &chroma_dc_total_zeros_bits[i][0], 1, 1, |
| 372 | INIT_VLC_USE_NEW_STATIC); |
| 373 | } |
| 374 | |
| 375 | for(i=0; i<7; i++){ |
| 376 | chroma422_dc_total_zeros_vlc[i].table = chroma422_dc_total_zeros_vlc_tables[i]; |
| 377 | chroma422_dc_total_zeros_vlc[i].table_allocated = chroma422_dc_total_zeros_vlc_tables_size; |
| 378 | init_vlc(&chroma422_dc_total_zeros_vlc[i], |
| 379 | CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 8, |
| 380 | &chroma422_dc_total_zeros_len [i][0], 1, 1, |
| 381 | &chroma422_dc_total_zeros_bits[i][0], 1, 1, |
| 382 | INIT_VLC_USE_NEW_STATIC); |
| 383 | } |
| 384 | |
| 385 | for(i=0; i<15; i++){ |
| 386 | total_zeros_vlc[i].table = total_zeros_vlc_tables[i]; |
| 387 | total_zeros_vlc[i].table_allocated = total_zeros_vlc_tables_size; |
| 388 | init_vlc(&total_zeros_vlc[i], |
| 389 | TOTAL_ZEROS_VLC_BITS, 16, |
| 390 | &total_zeros_len [i][0], 1, 1, |
| 391 | &total_zeros_bits[i][0], 1, 1, |
| 392 | INIT_VLC_USE_NEW_STATIC); |
| 393 | } |
| 394 | |
| 395 | for(i=0; i<6; i++){ |
| 396 | run_vlc[i].table = run_vlc_tables[i]; |
| 397 | run_vlc[i].table_allocated = run_vlc_tables_size; |
| 398 | init_vlc(&run_vlc[i], |
| 399 | RUN_VLC_BITS, 7, |
| 400 | &run_len [i][0], 1, 1, |
| 401 | &run_bits[i][0], 1, 1, |
| 402 | INIT_VLC_USE_NEW_STATIC); |
| 403 | } |
| 404 | run7_vlc.table = run7_vlc_table, |
| 405 | run7_vlc.table_allocated = run7_vlc_table_size; |
| 406 | init_vlc(&run7_vlc, RUN7_VLC_BITS, 16, |
| 407 | &run_len [6][0], 1, 1, |
| 408 | &run_bits[6][0], 1, 1, |
| 409 | INIT_VLC_USE_NEW_STATIC); |
| 410 | |
| 411 | init_cavlc_level_tab(); |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | /** |
| 416 | * |
| 417 | */ |
| 418 | static inline int get_level_prefix(GetBitContext *gb){ |
| 419 | unsigned int buf; |
| 420 | int log; |
| 421 | |
| 422 | OPEN_READER(re, gb); |
| 423 | UPDATE_CACHE(re, gb); |
| 424 | buf=GET_CACHE(re, gb); |
| 425 | |
| 426 | log= 32 - av_log2(buf); |
| 427 | #ifdef TRACE |
| 428 | print_bin(buf>>(32-log), log); |
| 429 | av_log(NULL, AV_LOG_DEBUG, "%5d %2d %3d lpr @%5d in %s get_level_prefix\n", buf>>(32-log), log, log-1, get_bits_count(gb), __FILE__); |
| 430 | #endif |
| 431 | |
| 432 | LAST_SKIP_BITS(re, gb, log); |
| 433 | CLOSE_READER(re, gb); |
| 434 | |
| 435 | return log-1; |
| 436 | } |
| 437 | |
| 438 | /** |
| 439 | * Decode a residual block. |
| 440 | * @param n block index |
| 441 | * @param scantable scantable |
| 442 | * @param max_coeff number of coefficients in the block |
| 443 | * @return <0 if an error occurred |
| 444 | */ |
| 445 | static int decode_residual(H264Context *h, GetBitContext *gb, int16_t *block, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff){ |
| 446 | static const int coeff_token_table_index[17]= {0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3}; |
| 447 | int level[16]; |
| 448 | int zeros_left, coeff_token, total_coeff, i, trailing_ones, run_before; |
| 449 | |
| 450 | //FIXME put trailing_onex into the context |
| 451 | |
| 452 | if(max_coeff <= 8){ |
| 453 | if (max_coeff == 4) |
| 454 | coeff_token = get_vlc2(gb, chroma_dc_coeff_token_vlc.table, CHROMA_DC_COEFF_TOKEN_VLC_BITS, 1); |
| 455 | else |
| 456 | coeff_token = get_vlc2(gb, chroma422_dc_coeff_token_vlc.table, CHROMA422_DC_COEFF_TOKEN_VLC_BITS, 1); |
| 457 | total_coeff= coeff_token>>2; |
| 458 | }else{ |
| 459 | if(n >= LUMA_DC_BLOCK_INDEX){ |
| 460 | total_coeff= pred_non_zero_count(h, (n - LUMA_DC_BLOCK_INDEX)*16); |
| 461 | coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2); |
| 462 | total_coeff= coeff_token>>2; |
| 463 | }else{ |
| 464 | total_coeff= pred_non_zero_count(h, n); |
| 465 | coeff_token= get_vlc2(gb, coeff_token_vlc[ coeff_token_table_index[total_coeff] ].table, COEFF_TOKEN_VLC_BITS, 2); |
| 466 | total_coeff= coeff_token>>2; |
| 467 | } |
| 468 | } |
| 469 | h->non_zero_count_cache[ scan8[n] ]= total_coeff; |
| 470 | |
| 471 | //FIXME set last_non_zero? |
| 472 | |
| 473 | if(total_coeff==0) |
| 474 | return 0; |
| 475 | if(total_coeff > (unsigned)max_coeff) { |
| 476 | av_log(h->avctx, AV_LOG_ERROR, "corrupted macroblock %d %d (total_coeff=%d)\n", h->mb_x, h->mb_y, total_coeff); |
| 477 | return -1; |
| 478 | } |
| 479 | |
| 480 | trailing_ones= coeff_token&3; |
| 481 | tprintf(h->avctx, "trailing:%d, total:%d\n", trailing_ones, total_coeff); |
| 482 | av_assert2(total_coeff<=16); |
| 483 | |
| 484 | i = show_bits(gb, 3); |
| 485 | skip_bits(gb, trailing_ones); |
| 486 | level[0] = 1-((i&4)>>1); |
| 487 | level[1] = 1-((i&2) ); |
| 488 | level[2] = 1-((i&1)<<1); |
| 489 | |
| 490 | if(trailing_ones<total_coeff) { |
| 491 | int mask, prefix; |
| 492 | int suffix_length = total_coeff > 10 & trailing_ones < 3; |
| 493 | int bitsi= show_bits(gb, LEVEL_TAB_BITS); |
| 494 | int level_code= cavlc_level_tab[suffix_length][bitsi][0]; |
| 495 | |
| 496 | skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]); |
| 497 | if(level_code >= 100){ |
| 498 | prefix= level_code - 100; |
| 499 | if(prefix == LEVEL_TAB_BITS) |
| 500 | prefix += get_level_prefix(gb); |
| 501 | |
| 502 | //first coefficient has suffix_length equal to 0 or 1 |
| 503 | if(prefix<14){ //FIXME try to build a large unified VLC table for all this |
| 504 | if(suffix_length) |
| 505 | level_code= (prefix<<1) + get_bits1(gb); //part |
| 506 | else |
| 507 | level_code= prefix; //part |
| 508 | }else if(prefix==14){ |
| 509 | if(suffix_length) |
| 510 | level_code= (prefix<<1) + get_bits1(gb); //part |
| 511 | else |
| 512 | level_code= prefix + get_bits(gb, 4); //part |
| 513 | }else{ |
| 514 | level_code= 30; |
| 515 | if(prefix>=16){ |
| 516 | if(prefix > 25+3){ |
| 517 | av_log(h->avctx, AV_LOG_ERROR, "Invalid level prefix\n"); |
| 518 | return -1; |
| 519 | } |
| 520 | level_code += (1<<(prefix-3))-4096; |
| 521 | } |
| 522 | level_code += get_bits(gb, prefix-3); //part |
| 523 | } |
| 524 | |
| 525 | if(trailing_ones < 3) level_code += 2; |
| 526 | |
| 527 | suffix_length = 2; |
| 528 | mask= -(level_code&1); |
| 529 | level[trailing_ones]= (((2+level_code)>>1) ^ mask) - mask; |
| 530 | }else{ |
| 531 | level_code += ((level_code>>31)|1) & -(trailing_ones < 3); |
| 532 | |
| 533 | suffix_length = 1 + (level_code + 3U > 6U); |
| 534 | level[trailing_ones]= level_code; |
| 535 | } |
| 536 | |
| 537 | //remaining coefficients have suffix_length > 0 |
| 538 | for(i=trailing_ones+1;i<total_coeff;i++) { |
| 539 | static const unsigned int suffix_limit[7] = {0,3,6,12,24,48,INT_MAX }; |
| 540 | int bitsi= show_bits(gb, LEVEL_TAB_BITS); |
| 541 | level_code= cavlc_level_tab[suffix_length][bitsi][0]; |
| 542 | |
| 543 | skip_bits(gb, cavlc_level_tab[suffix_length][bitsi][1]); |
| 544 | if(level_code >= 100){ |
| 545 | prefix= level_code - 100; |
| 546 | if(prefix == LEVEL_TAB_BITS){ |
| 547 | prefix += get_level_prefix(gb); |
| 548 | } |
| 549 | if(prefix<15){ |
| 550 | level_code = (prefix<<suffix_length) + get_bits(gb, suffix_length); |
| 551 | }else{ |
| 552 | level_code = 15<<suffix_length; |
| 553 | if (prefix>=16) { |
| 554 | if(prefix > 25+3){ |
| 555 | av_log(h->avctx, AV_LOG_ERROR, "Invalid level prefix\n"); |
| 556 | return AVERROR_INVALIDDATA; |
| 557 | } |
| 558 | level_code += (1<<(prefix-3))-4096; |
| 559 | } |
| 560 | level_code += get_bits(gb, prefix-3); |
| 561 | } |
| 562 | mask= -(level_code&1); |
| 563 | level_code= (((2+level_code)>>1) ^ mask) - mask; |
| 564 | } |
| 565 | level[i]= level_code; |
| 566 | suffix_length+= suffix_limit[suffix_length] + level_code > 2U*suffix_limit[suffix_length]; |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | if(total_coeff == max_coeff) |
| 571 | zeros_left=0; |
| 572 | else{ |
| 573 | if (max_coeff <= 8) { |
| 574 | if (max_coeff == 4) |
| 575 | zeros_left = get_vlc2(gb, (chroma_dc_total_zeros_vlc-1)[total_coeff].table, |
| 576 | CHROMA_DC_TOTAL_ZEROS_VLC_BITS, 1); |
| 577 | else |
| 578 | zeros_left = get_vlc2(gb, (chroma422_dc_total_zeros_vlc-1)[total_coeff].table, |
| 579 | CHROMA422_DC_TOTAL_ZEROS_VLC_BITS, 1); |
| 580 | } else { |
| 581 | zeros_left= get_vlc2(gb, (total_zeros_vlc-1)[ total_coeff ].table, TOTAL_ZEROS_VLC_BITS, 1); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | #define STORE_BLOCK(type) \ |
| 586 | scantable += zeros_left + total_coeff - 1; \ |
| 587 | if(n >= LUMA_DC_BLOCK_INDEX){ \ |
| 588 | ((type*)block)[*scantable] = level[0]; \ |
| 589 | for(i=1;i<total_coeff && zeros_left > 0;i++) { \ |
| 590 | if(zeros_left < 7) \ |
| 591 | run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1); \ |
| 592 | else \ |
| 593 | run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \ |
| 594 | zeros_left -= run_before; \ |
| 595 | scantable -= 1 + run_before; \ |
| 596 | ((type*)block)[*scantable]= level[i]; \ |
| 597 | } \ |
| 598 | for(;i<total_coeff;i++) { \ |
| 599 | scantable--; \ |
| 600 | ((type*)block)[*scantable]= level[i]; \ |
| 601 | } \ |
| 602 | }else{ \ |
| 603 | ((type*)block)[*scantable] = ((int)(level[0] * qmul[*scantable] + 32))>>6; \ |
| 604 | for(i=1;i<total_coeff && zeros_left > 0;i++) { \ |
| 605 | if(zeros_left < 7) \ |
| 606 | run_before= get_vlc2(gb, (run_vlc-1)[zeros_left].table, RUN_VLC_BITS, 1); \ |
| 607 | else \ |
| 608 | run_before= get_vlc2(gb, run7_vlc.table, RUN7_VLC_BITS, 2); \ |
| 609 | zeros_left -= run_before; \ |
| 610 | scantable -= 1 + run_before; \ |
| 611 | ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \ |
| 612 | } \ |
| 613 | for(;i<total_coeff;i++) { \ |
| 614 | scantable--; \ |
| 615 | ((type*)block)[*scantable]= ((int)(level[i] * qmul[*scantable] + 32))>>6; \ |
| 616 | } \ |
| 617 | } |
| 618 | |
| 619 | if (h->pixel_shift) { |
| 620 | STORE_BLOCK(int32_t) |
| 621 | } else { |
| 622 | STORE_BLOCK(int16_t) |
| 623 | } |
| 624 | |
| 625 | if(zeros_left<0){ |
| 626 | av_log(h->avctx, AV_LOG_ERROR, "negative number of zero coeffs at %d %d\n", h->mb_x, h->mb_y); |
| 627 | return -1; |
| 628 | } |
| 629 | |
| 630 | return 0; |
| 631 | } |
| 632 | |
| 633 | static av_always_inline int decode_luma_residual(H264Context *h, GetBitContext *gb, const uint8_t *scan, const uint8_t *scan8x8, int pixel_shift, int mb_type, int cbp, int p){ |
| 634 | int i4x4, i8x8; |
| 635 | int qscale = p == 0 ? h->qscale : h->chroma_qp[p-1]; |
| 636 | if(IS_INTRA16x16(mb_type)){ |
| 637 | AV_ZERO128(h->mb_luma_dc[p]+0); |
| 638 | AV_ZERO128(h->mb_luma_dc[p]+8); |
| 639 | AV_ZERO128(h->mb_luma_dc[p]+16); |
| 640 | AV_ZERO128(h->mb_luma_dc[p]+24); |
| 641 | if( decode_residual(h, h->intra_gb_ptr, h->mb_luma_dc[p], LUMA_DC_BLOCK_INDEX+p, scan, NULL, 16) < 0){ |
| 642 | return -1; //FIXME continue if partitioned and other return -1 too |
| 643 | } |
| 644 | |
| 645 | av_assert2((cbp&15) == 0 || (cbp&15) == 15); |
| 646 | |
| 647 | if(cbp&15){ |
| 648 | for(i8x8=0; i8x8<4; i8x8++){ |
| 649 | for(i4x4=0; i4x4<4; i4x4++){ |
| 650 | const int index= i4x4 + 4*i8x8 + p*16; |
| 651 | if( decode_residual(h, h->intra_gb_ptr, h->mb + (16*index << pixel_shift), |
| 652 | index, scan + 1, h->dequant4_coeff[p][qscale], 15) < 0 ){ |
| 653 | return -1; |
| 654 | } |
| 655 | } |
| 656 | } |
| 657 | return 0xf; |
| 658 | }else{ |
| 659 | fill_rectangle(&h->non_zero_count_cache[scan8[p*16]], 4, 4, 8, 0, 1); |
| 660 | return 0; |
| 661 | } |
| 662 | }else{ |
| 663 | int cqm = (IS_INTRA( mb_type ) ? 0:3)+p; |
| 664 | /* For CAVLC 4:4:4, we need to keep track of the luma 8x8 CBP for deblocking nnz purposes. */ |
| 665 | int new_cbp = 0; |
| 666 | for(i8x8=0; i8x8<4; i8x8++){ |
| 667 | if(cbp & (1<<i8x8)){ |
| 668 | if(IS_8x8DCT(mb_type)){ |
| 669 | int16_t *buf = &h->mb[64*i8x8+256*p << pixel_shift]; |
| 670 | uint8_t *nnz; |
| 671 | for(i4x4=0; i4x4<4; i4x4++){ |
| 672 | const int index= i4x4 + 4*i8x8 + p*16; |
| 673 | if( decode_residual(h, gb, buf, index, scan8x8+16*i4x4, |
| 674 | h->dequant8_coeff[cqm][qscale], 16) < 0 ) |
| 675 | return -1; |
| 676 | } |
| 677 | nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ]; |
| 678 | nnz[0] += nnz[1] + nnz[8] + nnz[9]; |
| 679 | new_cbp |= !!nnz[0] << i8x8; |
| 680 | }else{ |
| 681 | for(i4x4=0; i4x4<4; i4x4++){ |
| 682 | const int index= i4x4 + 4*i8x8 + p*16; |
| 683 | if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index, |
| 684 | scan, h->dequant4_coeff[cqm][qscale], 16) < 0 ){ |
| 685 | return -1; |
| 686 | } |
| 687 | new_cbp |= h->non_zero_count_cache[ scan8[index] ] << i8x8; |
| 688 | } |
| 689 | } |
| 690 | }else{ |
| 691 | uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8+p*16] ]; |
| 692 | nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0; |
| 693 | } |
| 694 | } |
| 695 | return new_cbp; |
| 696 | } |
| 697 | } |
| 698 | |
| 699 | int ff_h264_decode_mb_cavlc(H264Context *h){ |
| 700 | int mb_xy; |
| 701 | int partition_count; |
| 702 | unsigned int mb_type, cbp; |
| 703 | int dct8x8_allowed= h->pps.transform_8x8_mode; |
| 704 | int decode_chroma = h->sps.chroma_format_idc == 1 || h->sps.chroma_format_idc == 2; |
| 705 | const int pixel_shift = h->pixel_shift; |
| 706 | unsigned local_ref_count[2]; |
| 707 | |
| 708 | mb_xy = h->mb_xy = h->mb_x + h->mb_y*h->mb_stride; |
| 709 | |
| 710 | tprintf(h->avctx, "pic:%d mb:%d/%d\n", h->frame_num, h->mb_x, h->mb_y); |
| 711 | cbp = 0; /* avoid warning. FIXME: find a solution without slowing |
| 712 | down the code */ |
| 713 | if(h->slice_type_nos != AV_PICTURE_TYPE_I){ |
| 714 | if(h->mb_skip_run==-1) |
| 715 | h->mb_skip_run= get_ue_golomb_long(&h->gb); |
| 716 | |
| 717 | if (h->mb_skip_run--) { |
| 718 | if(FRAME_MBAFF(h) && (h->mb_y&1) == 0){ |
| 719 | if(h->mb_skip_run==0) |
| 720 | h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&h->gb); |
| 721 | } |
| 722 | decode_mb_skip(h); |
| 723 | return 0; |
| 724 | } |
| 725 | } |
| 726 | if (FRAME_MBAFF(h)) { |
| 727 | if( (h->mb_y&1) == 0 ) |
| 728 | h->mb_mbaff = h->mb_field_decoding_flag = get_bits1(&h->gb); |
| 729 | } |
| 730 | |
| 731 | h->prev_mb_skipped= 0; |
| 732 | |
| 733 | mb_type= get_ue_golomb(&h->gb); |
| 734 | if(h->slice_type_nos == AV_PICTURE_TYPE_B){ |
| 735 | if(mb_type < 23){ |
| 736 | partition_count= b_mb_type_info[mb_type].partition_count; |
| 737 | mb_type= b_mb_type_info[mb_type].type; |
| 738 | }else{ |
| 739 | mb_type -= 23; |
| 740 | goto decode_intra_mb; |
| 741 | } |
| 742 | }else if(h->slice_type_nos == AV_PICTURE_TYPE_P){ |
| 743 | if(mb_type < 5){ |
| 744 | partition_count= p_mb_type_info[mb_type].partition_count; |
| 745 | mb_type= p_mb_type_info[mb_type].type; |
| 746 | }else{ |
| 747 | mb_type -= 5; |
| 748 | goto decode_intra_mb; |
| 749 | } |
| 750 | }else{ |
| 751 | av_assert2(h->slice_type_nos == AV_PICTURE_TYPE_I); |
| 752 | if(h->slice_type == AV_PICTURE_TYPE_SI && mb_type) |
| 753 | mb_type--; |
| 754 | decode_intra_mb: |
| 755 | if(mb_type > 25){ |
| 756 | av_log(h->avctx, AV_LOG_ERROR, "mb_type %d in %c slice too large at %d %d\n", mb_type, av_get_picture_type_char(h->slice_type), h->mb_x, h->mb_y); |
| 757 | return -1; |
| 758 | } |
| 759 | partition_count=0; |
| 760 | cbp= i_mb_type_info[mb_type].cbp; |
| 761 | h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode; |
| 762 | mb_type= i_mb_type_info[mb_type].type; |
| 763 | } |
| 764 | |
| 765 | if(MB_FIELD(h)) |
| 766 | mb_type |= MB_TYPE_INTERLACED; |
| 767 | |
| 768 | h->slice_table[ mb_xy ]= h->slice_num; |
| 769 | |
| 770 | if(IS_INTRA_PCM(mb_type)){ |
| 771 | const int mb_size = ff_h264_mb_sizes[h->sps.chroma_format_idc] * |
| 772 | h->sps.bit_depth_luma; |
| 773 | |
| 774 | // We assume these blocks are very rare so we do not optimize it. |
| 775 | h->intra_pcm_ptr = align_get_bits(&h->gb); |
| 776 | if (get_bits_left(&h->gb) < mb_size) { |
| 777 | av_log(h->avctx, AV_LOG_ERROR, "Not enough data for an intra PCM block.\n"); |
| 778 | return AVERROR_INVALIDDATA; |
| 779 | } |
| 780 | skip_bits_long(&h->gb, mb_size); |
| 781 | |
| 782 | // In deblocking, the quantizer is 0 |
| 783 | h->cur_pic.qscale_table[mb_xy] = 0; |
| 784 | // All coeffs are present |
| 785 | memset(h->non_zero_count[mb_xy], 16, 48); |
| 786 | |
| 787 | h->cur_pic.mb_type[mb_xy] = mb_type; |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | local_ref_count[0] = h->ref_count[0] << MB_MBAFF(h); |
| 792 | local_ref_count[1] = h->ref_count[1] << MB_MBAFF(h); |
| 793 | |
| 794 | fill_decode_neighbors(h, mb_type); |
| 795 | fill_decode_caches(h, mb_type); |
| 796 | |
| 797 | //mb_pred |
| 798 | if(IS_INTRA(mb_type)){ |
| 799 | int pred_mode; |
| 800 | // init_top_left_availability(h); |
| 801 | if(IS_INTRA4x4(mb_type)){ |
| 802 | int i; |
| 803 | int di = 1; |
| 804 | if(dct8x8_allowed && get_bits1(&h->gb)){ |
| 805 | mb_type |= MB_TYPE_8x8DCT; |
| 806 | di = 4; |
| 807 | } |
| 808 | |
| 809 | // fill_intra4x4_pred_table(h); |
| 810 | for(i=0; i<16; i+=di){ |
| 811 | int mode= pred_intra_mode(h, i); |
| 812 | |
| 813 | if(!get_bits1(&h->gb)){ |
| 814 | const int rem_mode= get_bits(&h->gb, 3); |
| 815 | mode = rem_mode + (rem_mode >= mode); |
| 816 | } |
| 817 | |
| 818 | if(di==4) |
| 819 | fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 ); |
| 820 | else |
| 821 | h->intra4x4_pred_mode_cache[ scan8[i] ] = mode; |
| 822 | } |
| 823 | write_back_intra_pred_mode(h); |
| 824 | if( ff_h264_check_intra4x4_pred_mode(h) < 0) |
| 825 | return -1; |
| 826 | }else{ |
| 827 | h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode(h, h->intra16x16_pred_mode, 0); |
| 828 | if(h->intra16x16_pred_mode < 0) |
| 829 | return -1; |
| 830 | } |
| 831 | if(decode_chroma){ |
| 832 | pred_mode= ff_h264_check_intra_pred_mode(h, get_ue_golomb_31(&h->gb), 1); |
| 833 | if(pred_mode < 0) |
| 834 | return -1; |
| 835 | h->chroma_pred_mode= pred_mode; |
| 836 | } else { |
| 837 | h->chroma_pred_mode = DC_128_PRED8x8; |
| 838 | } |
| 839 | }else if(partition_count==4){ |
| 840 | int i, j, sub_partition_count[4], list, ref[2][4]; |
| 841 | |
| 842 | if(h->slice_type_nos == AV_PICTURE_TYPE_B){ |
| 843 | for(i=0; i<4; i++){ |
| 844 | h->sub_mb_type[i]= get_ue_golomb_31(&h->gb); |
| 845 | if(h->sub_mb_type[i] >=13){ |
| 846 | av_log(h->avctx, AV_LOG_ERROR, "B sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], h->mb_x, h->mb_y); |
| 847 | return -1; |
| 848 | } |
| 849 | sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count; |
| 850 | h->sub_mb_type[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].type; |
| 851 | } |
| 852 | if( IS_DIRECT(h->sub_mb_type[0]|h->sub_mb_type[1]|h->sub_mb_type[2]|h->sub_mb_type[3])) { |
| 853 | ff_h264_pred_direct_motion(h, &mb_type); |
| 854 | h->ref_cache[0][scan8[4]] = |
| 855 | h->ref_cache[1][scan8[4]] = |
| 856 | h->ref_cache[0][scan8[12]] = |
| 857 | h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE; |
| 858 | } |
| 859 | }else{ |
| 860 | av_assert2(h->slice_type_nos == AV_PICTURE_TYPE_P); //FIXME SP correct ? |
| 861 | for(i=0; i<4; i++){ |
| 862 | h->sub_mb_type[i]= get_ue_golomb_31(&h->gb); |
| 863 | if(h->sub_mb_type[i] >=4){ |
| 864 | av_log(h->avctx, AV_LOG_ERROR, "P sub_mb_type %u out of range at %d %d\n", h->sub_mb_type[i], h->mb_x, h->mb_y); |
| 865 | return -1; |
| 866 | } |
| 867 | sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count; |
| 868 | h->sub_mb_type[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].type; |
| 869 | } |
| 870 | } |
| 871 | |
| 872 | for(list=0; list<h->list_count; list++){ |
| 873 | int ref_count = IS_REF0(mb_type) ? 1 : local_ref_count[list]; |
| 874 | for(i=0; i<4; i++){ |
| 875 | if(IS_DIRECT(h->sub_mb_type[i])) continue; |
| 876 | if(IS_DIR(h->sub_mb_type[i], 0, list)){ |
| 877 | unsigned int tmp; |
| 878 | if(ref_count == 1){ |
| 879 | tmp= 0; |
| 880 | }else if(ref_count == 2){ |
| 881 | tmp= get_bits1(&h->gb)^1; |
| 882 | }else{ |
| 883 | tmp= get_ue_golomb_31(&h->gb); |
| 884 | if(tmp>=ref_count){ |
| 885 | av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", tmp); |
| 886 | return -1; |
| 887 | } |
| 888 | } |
| 889 | ref[list][i]= tmp; |
| 890 | }else{ |
| 891 | //FIXME |
| 892 | ref[list][i] = -1; |
| 893 | } |
| 894 | } |
| 895 | } |
| 896 | |
| 897 | if(dct8x8_allowed) |
| 898 | dct8x8_allowed = get_dct8x8_allowed(h); |
| 899 | |
| 900 | for(list=0; list<h->list_count; list++){ |
| 901 | for(i=0; i<4; i++){ |
| 902 | if(IS_DIRECT(h->sub_mb_type[i])) { |
| 903 | h->ref_cache[list][ scan8[4*i] ] = h->ref_cache[list][ scan8[4*i]+1 ]; |
| 904 | continue; |
| 905 | } |
| 906 | h->ref_cache[list][ scan8[4*i] ]=h->ref_cache[list][ scan8[4*i]+1 ]= |
| 907 | h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i]; |
| 908 | |
| 909 | if(IS_DIR(h->sub_mb_type[i], 0, list)){ |
| 910 | const int sub_mb_type= h->sub_mb_type[i]; |
| 911 | const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1; |
| 912 | for(j=0; j<sub_partition_count[i]; j++){ |
| 913 | int mx, my; |
| 914 | const int index= 4*i + block_width*j; |
| 915 | int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ]; |
| 916 | pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mx, &my); |
| 917 | mx += get_se_golomb(&h->gb); |
| 918 | my += get_se_golomb(&h->gb); |
| 919 | tprintf(h->avctx, "final mv:%d %d\n", mx, my); |
| 920 | |
| 921 | if(IS_SUB_8X8(sub_mb_type)){ |
| 922 | mv_cache[ 1 ][0]= |
| 923 | mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx; |
| 924 | mv_cache[ 1 ][1]= |
| 925 | mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my; |
| 926 | }else if(IS_SUB_8X4(sub_mb_type)){ |
| 927 | mv_cache[ 1 ][0]= mx; |
| 928 | mv_cache[ 1 ][1]= my; |
| 929 | }else if(IS_SUB_4X8(sub_mb_type)){ |
| 930 | mv_cache[ 8 ][0]= mx; |
| 931 | mv_cache[ 8 ][1]= my; |
| 932 | } |
| 933 | mv_cache[ 0 ][0]= mx; |
| 934 | mv_cache[ 0 ][1]= my; |
| 935 | } |
| 936 | }else{ |
| 937 | uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0]; |
| 938 | p[0] = p[1]= |
| 939 | p[8] = p[9]= 0; |
| 940 | } |
| 941 | } |
| 942 | } |
| 943 | }else if(IS_DIRECT(mb_type)){ |
| 944 | ff_h264_pred_direct_motion(h, &mb_type); |
| 945 | dct8x8_allowed &= h->sps.direct_8x8_inference_flag; |
| 946 | }else{ |
| 947 | int list, mx, my, i; |
| 948 | //FIXME we should set ref_idx_l? to 0 if we use that later ... |
| 949 | if(IS_16X16(mb_type)){ |
| 950 | for(list=0; list<h->list_count; list++){ |
| 951 | unsigned int val; |
| 952 | if(IS_DIR(mb_type, 0, list)){ |
| 953 | if(local_ref_count[list]==1){ |
| 954 | val= 0; |
| 955 | } else if(local_ref_count[list]==2){ |
| 956 | val= get_bits1(&h->gb)^1; |
| 957 | }else{ |
| 958 | val= get_ue_golomb_31(&h->gb); |
| 959 | if (val >= local_ref_count[list]){ |
| 960 | av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val); |
| 961 | return -1; |
| 962 | } |
| 963 | } |
| 964 | fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, val, 1); |
| 965 | } |
| 966 | } |
| 967 | for(list=0; list<h->list_count; list++){ |
| 968 | if(IS_DIR(mb_type, 0, list)){ |
| 969 | pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mx, &my); |
| 970 | mx += get_se_golomb(&h->gb); |
| 971 | my += get_se_golomb(&h->gb); |
| 972 | tprintf(h->avctx, "final mv:%d %d\n", mx, my); |
| 973 | |
| 974 | fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4); |
| 975 | } |
| 976 | } |
| 977 | } |
| 978 | else if(IS_16X8(mb_type)){ |
| 979 | for(list=0; list<h->list_count; list++){ |
| 980 | for(i=0; i<2; i++){ |
| 981 | unsigned int val; |
| 982 | if(IS_DIR(mb_type, i, list)){ |
| 983 | if(local_ref_count[list] == 1) { |
| 984 | val= 0; |
| 985 | } else if(local_ref_count[list] == 2) { |
| 986 | val= get_bits1(&h->gb)^1; |
| 987 | }else{ |
| 988 | val= get_ue_golomb_31(&h->gb); |
| 989 | if (val >= local_ref_count[list]){ |
| 990 | av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val); |
| 991 | return -1; |
| 992 | } |
| 993 | } |
| 994 | }else |
| 995 | val= LIST_NOT_USED&0xFF; |
| 996 | fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 1); |
| 997 | } |
| 998 | } |
| 999 | for(list=0; list<h->list_count; list++){ |
| 1000 | for(i=0; i<2; i++){ |
| 1001 | unsigned int val; |
| 1002 | if(IS_DIR(mb_type, i, list)){ |
| 1003 | pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mx, &my); |
| 1004 | mx += get_se_golomb(&h->gb); |
| 1005 | my += get_se_golomb(&h->gb); |
| 1006 | tprintf(h->avctx, "final mv:%d %d\n", mx, my); |
| 1007 | |
| 1008 | val= pack16to32(mx,my); |
| 1009 | }else |
| 1010 | val=0; |
| 1011 | fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, val, 4); |
| 1012 | } |
| 1013 | } |
| 1014 | }else{ |
| 1015 | av_assert2(IS_8X16(mb_type)); |
| 1016 | for(list=0; list<h->list_count; list++){ |
| 1017 | for(i=0; i<2; i++){ |
| 1018 | unsigned int val; |
| 1019 | if(IS_DIR(mb_type, i, list)){ //FIXME optimize |
| 1020 | if(local_ref_count[list]==1){ |
| 1021 | val= 0; |
| 1022 | } else if(local_ref_count[list]==2){ |
| 1023 | val= get_bits1(&h->gb)^1; |
| 1024 | }else{ |
| 1025 | val= get_ue_golomb_31(&h->gb); |
| 1026 | if (val >= local_ref_count[list]){ |
| 1027 | av_log(h->avctx, AV_LOG_ERROR, "ref %u overflow\n", val); |
| 1028 | return -1; |
| 1029 | } |
| 1030 | } |
| 1031 | }else |
| 1032 | val= LIST_NOT_USED&0xFF; |
| 1033 | fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 1); |
| 1034 | } |
| 1035 | } |
| 1036 | for(list=0; list<h->list_count; list++){ |
| 1037 | for(i=0; i<2; i++){ |
| 1038 | unsigned int val; |
| 1039 | if(IS_DIR(mb_type, i, list)){ |
| 1040 | pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mx, &my); |
| 1041 | mx += get_se_golomb(&h->gb); |
| 1042 | my += get_se_golomb(&h->gb); |
| 1043 | tprintf(h->avctx, "final mv:%d %d\n", mx, my); |
| 1044 | |
| 1045 | val= pack16to32(mx,my); |
| 1046 | }else |
| 1047 | val=0; |
| 1048 | fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, val, 4); |
| 1049 | } |
| 1050 | } |
| 1051 | } |
| 1052 | } |
| 1053 | |
| 1054 | if(IS_INTER(mb_type)) |
| 1055 | write_back_motion(h, mb_type); |
| 1056 | |
| 1057 | if(!IS_INTRA16x16(mb_type)){ |
| 1058 | cbp= get_ue_golomb(&h->gb); |
| 1059 | |
| 1060 | if(decode_chroma){ |
| 1061 | if(cbp > 47){ |
| 1062 | av_log(h->avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, h->mb_x, h->mb_y); |
| 1063 | return -1; |
| 1064 | } |
| 1065 | if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp[cbp]; |
| 1066 | else cbp= golomb_to_inter_cbp [cbp]; |
| 1067 | }else{ |
| 1068 | if(cbp > 15){ |
| 1069 | av_log(h->avctx, AV_LOG_ERROR, "cbp too large (%u) at %d %d\n", cbp, h->mb_x, h->mb_y); |
| 1070 | return -1; |
| 1071 | } |
| 1072 | if(IS_INTRA4x4(mb_type)) cbp= golomb_to_intra4x4_cbp_gray[cbp]; |
| 1073 | else cbp= golomb_to_inter_cbp_gray[cbp]; |
| 1074 | } |
| 1075 | } else { |
| 1076 | if (!decode_chroma && cbp>15) { |
| 1077 | av_log(h->avctx, AV_LOG_ERROR, "gray chroma\n"); |
| 1078 | return AVERROR_INVALIDDATA; |
| 1079 | } |
| 1080 | } |
| 1081 | |
| 1082 | if(dct8x8_allowed && (cbp&15) && !IS_INTRA(mb_type)){ |
| 1083 | mb_type |= MB_TYPE_8x8DCT*get_bits1(&h->gb); |
| 1084 | } |
| 1085 | h->cbp= |
| 1086 | h->cbp_table[mb_xy]= cbp; |
| 1087 | h->cur_pic.mb_type[mb_xy] = mb_type; |
| 1088 | |
| 1089 | if(cbp || IS_INTRA16x16(mb_type)){ |
| 1090 | int i4x4, i8x8, chroma_idx; |
| 1091 | int dquant; |
| 1092 | int ret; |
| 1093 | GetBitContext *gb= IS_INTRA(mb_type) ? h->intra_gb_ptr : h->inter_gb_ptr; |
| 1094 | const uint8_t *scan, *scan8x8; |
| 1095 | const int max_qp = 51 + 6*(h->sps.bit_depth_luma-8); |
| 1096 | |
| 1097 | if(IS_INTERLACED(mb_type)){ |
| 1098 | scan8x8= h->qscale ? h->field_scan8x8_cavlc : h->field_scan8x8_cavlc_q0; |
| 1099 | scan= h->qscale ? h->field_scan : h->field_scan_q0; |
| 1100 | }else{ |
| 1101 | scan8x8= h->qscale ? h->zigzag_scan8x8_cavlc : h->zigzag_scan8x8_cavlc_q0; |
| 1102 | scan= h->qscale ? h->zigzag_scan : h->zigzag_scan_q0; |
| 1103 | } |
| 1104 | |
| 1105 | dquant= get_se_golomb(&h->gb); |
| 1106 | |
| 1107 | h->qscale += dquant; |
| 1108 | |
| 1109 | if(((unsigned)h->qscale) > max_qp){ |
| 1110 | if(h->qscale<0) h->qscale+= max_qp+1; |
| 1111 | else h->qscale-= max_qp+1; |
| 1112 | if(((unsigned)h->qscale) > max_qp){ |
| 1113 | av_log(h->avctx, AV_LOG_ERROR, "dquant out of range (%d) at %d %d\n", dquant, h->mb_x, h->mb_y); |
| 1114 | return -1; |
| 1115 | } |
| 1116 | } |
| 1117 | |
| 1118 | h->chroma_qp[0]= get_chroma_qp(h, 0, h->qscale); |
| 1119 | h->chroma_qp[1]= get_chroma_qp(h, 1, h->qscale); |
| 1120 | |
| 1121 | if( (ret = decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 0)) < 0 ){ |
| 1122 | return -1; |
| 1123 | } |
| 1124 | h->cbp_table[mb_xy] |= ret << 12; |
| 1125 | if (CHROMA444(h)) { |
| 1126 | if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 1) < 0 ){ |
| 1127 | return -1; |
| 1128 | } |
| 1129 | if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 2) < 0 ){ |
| 1130 | return -1; |
| 1131 | } |
| 1132 | } else { |
| 1133 | const int num_c8x8 = h->sps.chroma_format_idc; |
| 1134 | |
| 1135 | if(cbp&0x30){ |
| 1136 | for(chroma_idx=0; chroma_idx<2; chroma_idx++) |
| 1137 | if (decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift), |
| 1138 | CHROMA_DC_BLOCK_INDEX+chroma_idx, |
| 1139 | CHROMA422(h) ? chroma422_dc_scan : chroma_dc_scan, |
| 1140 | NULL, 4*num_c8x8) < 0) { |
| 1141 | return -1; |
| 1142 | } |
| 1143 | } |
| 1144 | |
| 1145 | if(cbp&0x20){ |
| 1146 | for(chroma_idx=0; chroma_idx<2; chroma_idx++){ |
| 1147 | const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]]; |
| 1148 | int16_t *mb = h->mb + (16*(16 + 16*chroma_idx) << pixel_shift); |
| 1149 | for (i8x8 = 0; i8x8<num_c8x8; i8x8++) { |
| 1150 | for (i4x4 = 0; i4x4 < 4; i4x4++) { |
| 1151 | const int index = 16 + 16*chroma_idx + 8*i8x8 + i4x4; |
| 1152 | if (decode_residual(h, gb, mb, index, scan + 1, qmul, 15) < 0) |
| 1153 | return -1; |
| 1154 | mb += 16 << pixel_shift; |
| 1155 | } |
| 1156 | } |
| 1157 | } |
| 1158 | }else{ |
| 1159 | fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1); |
| 1160 | fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1); |
| 1161 | } |
| 1162 | } |
| 1163 | }else{ |
| 1164 | fill_rectangle(&h->non_zero_count_cache[scan8[ 0]], 4, 4, 8, 0, 1); |
| 1165 | fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1); |
| 1166 | fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1); |
| 1167 | } |
| 1168 | h->cur_pic.qscale_table[mb_xy] = h->qscale; |
| 1169 | write_back_non_zero_count(h); |
| 1170 | |
| 1171 | return 0; |
| 1172 | } |