| 1 | /* |
| 2 | * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2.1 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with FFmpeg; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * @file |
| 23 | * VP5 and VP6 compatible video decoder (common features) |
| 24 | */ |
| 25 | |
| 26 | #include "avcodec.h" |
| 27 | #include "bytestream.h" |
| 28 | #include "internal.h" |
| 29 | #include "h264chroma.h" |
| 30 | #include "vp56.h" |
| 31 | #include "vp56data.h" |
| 32 | |
| 33 | |
| 34 | void ff_vp56_init_dequant(VP56Context *s, int quantizer) |
| 35 | { |
| 36 | s->quantizer = quantizer; |
| 37 | s->dequant_dc = ff_vp56_dc_dequant[quantizer] << 2; |
| 38 | s->dequant_ac = ff_vp56_ac_dequant[quantizer] << 2; |
| 39 | } |
| 40 | |
| 41 | static int vp56_get_vectors_predictors(VP56Context *s, int row, int col, |
| 42 | VP56Frame ref_frame) |
| 43 | { |
| 44 | int nb_pred = 0; |
| 45 | VP56mv vect[2] = {{0,0}, {0,0}}; |
| 46 | int pos, offset; |
| 47 | VP56mv mvp; |
| 48 | |
| 49 | for (pos=0; pos<12; pos++) { |
| 50 | mvp.x = col + ff_vp56_candidate_predictor_pos[pos][0]; |
| 51 | mvp.y = row + ff_vp56_candidate_predictor_pos[pos][1]; |
| 52 | if (mvp.x < 0 || mvp.x >= s->mb_width || |
| 53 | mvp.y < 0 || mvp.y >= s->mb_height) |
| 54 | continue; |
| 55 | offset = mvp.x + s->mb_width*mvp.y; |
| 56 | |
| 57 | if (ff_vp56_reference_frame[s->macroblocks[offset].type] != ref_frame) |
| 58 | continue; |
| 59 | if ((s->macroblocks[offset].mv.x == vect[0].x && |
| 60 | s->macroblocks[offset].mv.y == vect[0].y) || |
| 61 | (s->macroblocks[offset].mv.x == 0 && |
| 62 | s->macroblocks[offset].mv.y == 0)) |
| 63 | continue; |
| 64 | |
| 65 | vect[nb_pred++] = s->macroblocks[offset].mv; |
| 66 | if (nb_pred > 1) { |
| 67 | nb_pred = -1; |
| 68 | break; |
| 69 | } |
| 70 | s->vector_candidate_pos = pos; |
| 71 | } |
| 72 | |
| 73 | s->vector_candidate[0] = vect[0]; |
| 74 | s->vector_candidate[1] = vect[1]; |
| 75 | |
| 76 | return nb_pred+1; |
| 77 | } |
| 78 | |
| 79 | static void vp56_parse_mb_type_models(VP56Context *s) |
| 80 | { |
| 81 | VP56RangeCoder *c = &s->c; |
| 82 | VP56Model *model = s->modelp; |
| 83 | int i, ctx, type; |
| 84 | |
| 85 | for (ctx=0; ctx<3; ctx++) { |
| 86 | if (vp56_rac_get_prob_branchy(c, 174)) { |
| 87 | int idx = vp56_rac_gets(c, 4); |
| 88 | memcpy(model->mb_types_stats[ctx], |
| 89 | ff_vp56_pre_def_mb_type_stats[idx][ctx], |
| 90 | sizeof(model->mb_types_stats[ctx])); |
| 91 | } |
| 92 | if (vp56_rac_get_prob_branchy(c, 254)) { |
| 93 | for (type=0; type<10; type++) { |
| 94 | for(i=0; i<2; i++) { |
| 95 | if (vp56_rac_get_prob_branchy(c, 205)) { |
| 96 | int delta, sign = vp56_rac_get(c); |
| 97 | |
| 98 | delta = vp56_rac_get_tree(c, ff_vp56_pmbtm_tree, |
| 99 | ff_vp56_mb_type_model_model); |
| 100 | if (!delta) |
| 101 | delta = 4 * vp56_rac_gets(c, 7); |
| 102 | model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign; |
| 103 | } |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | /* compute MB type probability tables based on previous MB type */ |
| 110 | for (ctx=0; ctx<3; ctx++) { |
| 111 | int p[10]; |
| 112 | |
| 113 | for (type=0; type<10; type++) |
| 114 | p[type] = 100 * model->mb_types_stats[ctx][type][1]; |
| 115 | |
| 116 | for (type=0; type<10; type++) { |
| 117 | int p02, p34, p0234, p17, p56, p89, p5689, p156789; |
| 118 | |
| 119 | /* conservative MB type probability */ |
| 120 | model->mb_type[ctx][type][0] = 255 - (255 * model->mb_types_stats[ctx][type][0]) / (1 + model->mb_types_stats[ctx][type][0] + model->mb_types_stats[ctx][type][1]); |
| 121 | |
| 122 | p[type] = 0; /* same MB type => weight is null */ |
| 123 | |
| 124 | /* binary tree parsing probabilities */ |
| 125 | p02 = p[0] + p[2]; |
| 126 | p34 = p[3] + p[4]; |
| 127 | p0234 = p02 + p34; |
| 128 | p17 = p[1] + p[7]; |
| 129 | p56 = p[5] + p[6]; |
| 130 | p89 = p[8] + p[9]; |
| 131 | p5689 = p56 + p89; |
| 132 | p156789 = p17 + p5689; |
| 133 | |
| 134 | model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789); |
| 135 | model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234); |
| 136 | model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789); |
| 137 | model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02); |
| 138 | model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34); |
| 139 | model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17); |
| 140 | model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689); |
| 141 | model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56); |
| 142 | model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89); |
| 143 | |
| 144 | /* restore initial value */ |
| 145 | p[type] = 100 * model->mb_types_stats[ctx][type][1]; |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | static VP56mb vp56_parse_mb_type(VP56Context *s, |
| 151 | VP56mb prev_type, int ctx) |
| 152 | { |
| 153 | uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type]; |
| 154 | VP56RangeCoder *c = &s->c; |
| 155 | |
| 156 | if (vp56_rac_get_prob_branchy(c, mb_type_model[0])) |
| 157 | return prev_type; |
| 158 | else |
| 159 | return vp56_rac_get_tree(c, ff_vp56_pmbt_tree, mb_type_model); |
| 160 | } |
| 161 | |
| 162 | static void vp56_decode_4mv(VP56Context *s, int row, int col) |
| 163 | { |
| 164 | VP56mv mv = {0,0}; |
| 165 | int type[4]; |
| 166 | int b; |
| 167 | |
| 168 | /* parse each block type */ |
| 169 | for (b=0; b<4; b++) { |
| 170 | type[b] = vp56_rac_gets(&s->c, 2); |
| 171 | if (type[b]) |
| 172 | type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */ |
| 173 | } |
| 174 | |
| 175 | /* get vectors */ |
| 176 | for (b=0; b<4; b++) { |
| 177 | switch (type[b]) { |
| 178 | case VP56_MB_INTER_NOVEC_PF: |
| 179 | s->mv[b] = (VP56mv) {0,0}; |
| 180 | break; |
| 181 | case VP56_MB_INTER_DELTA_PF: |
| 182 | s->parse_vector_adjustment(s, &s->mv[b]); |
| 183 | break; |
| 184 | case VP56_MB_INTER_V1_PF: |
| 185 | s->mv[b] = s->vector_candidate[0]; |
| 186 | break; |
| 187 | case VP56_MB_INTER_V2_PF: |
| 188 | s->mv[b] = s->vector_candidate[1]; |
| 189 | break; |
| 190 | } |
| 191 | mv.x += s->mv[b].x; |
| 192 | mv.y += s->mv[b].y; |
| 193 | } |
| 194 | |
| 195 | /* this is the one selected for the whole MB for prediction */ |
| 196 | s->macroblocks[row * s->mb_width + col].mv = s->mv[3]; |
| 197 | |
| 198 | /* chroma vectors are average luma vectors */ |
| 199 | if (s->avctx->codec->id == AV_CODEC_ID_VP5) { |
| 200 | s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2); |
| 201 | s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2); |
| 202 | } else { |
| 203 | s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4}; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | static VP56mb vp56_decode_mv(VP56Context *s, int row, int col) |
| 208 | { |
| 209 | VP56mv *mv, vect = {0,0}; |
| 210 | int ctx, b; |
| 211 | |
| 212 | ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS); |
| 213 | s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx); |
| 214 | s->macroblocks[row * s->mb_width + col].type = s->mb_type; |
| 215 | |
| 216 | switch (s->mb_type) { |
| 217 | case VP56_MB_INTER_V1_PF: |
| 218 | mv = &s->vector_candidate[0]; |
| 219 | break; |
| 220 | |
| 221 | case VP56_MB_INTER_V2_PF: |
| 222 | mv = &s->vector_candidate[1]; |
| 223 | break; |
| 224 | |
| 225 | case VP56_MB_INTER_V1_GF: |
| 226 | vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); |
| 227 | mv = &s->vector_candidate[0]; |
| 228 | break; |
| 229 | |
| 230 | case VP56_MB_INTER_V2_GF: |
| 231 | vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); |
| 232 | mv = &s->vector_candidate[1]; |
| 233 | break; |
| 234 | |
| 235 | case VP56_MB_INTER_DELTA_PF: |
| 236 | s->parse_vector_adjustment(s, &vect); |
| 237 | mv = &vect; |
| 238 | break; |
| 239 | |
| 240 | case VP56_MB_INTER_DELTA_GF: |
| 241 | vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); |
| 242 | s->parse_vector_adjustment(s, &vect); |
| 243 | mv = &vect; |
| 244 | break; |
| 245 | |
| 246 | case VP56_MB_INTER_4V: |
| 247 | vp56_decode_4mv(s, row, col); |
| 248 | return s->mb_type; |
| 249 | |
| 250 | default: |
| 251 | mv = &vect; |
| 252 | break; |
| 253 | } |
| 254 | |
| 255 | s->macroblocks[row*s->mb_width + col].mv = *mv; |
| 256 | |
| 257 | /* same vector for all blocks */ |
| 258 | for (b=0; b<6; b++) |
| 259 | s->mv[b] = *mv; |
| 260 | |
| 261 | return s->mb_type; |
| 262 | } |
| 263 | |
| 264 | static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame) |
| 265 | { |
| 266 | int idx = s->idct_scantable[0]; |
| 267 | int b; |
| 268 | |
| 269 | for (b=0; b<6; b++) { |
| 270 | VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]]; |
| 271 | VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]]; |
| 272 | int count = 0; |
| 273 | int dc = 0; |
| 274 | int i; |
| 275 | |
| 276 | if (ref_frame == lb->ref_frame) { |
| 277 | dc += lb->dc_coeff; |
| 278 | count++; |
| 279 | } |
| 280 | if (ref_frame == ab->ref_frame) { |
| 281 | dc += ab->dc_coeff; |
| 282 | count++; |
| 283 | } |
| 284 | if (s->avctx->codec->id == AV_CODEC_ID_VP5) |
| 285 | for (i=0; i<2; i++) |
| 286 | if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) { |
| 287 | dc += ab[-1+2*i].dc_coeff; |
| 288 | count++; |
| 289 | } |
| 290 | if (count == 0) |
| 291 | dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame]; |
| 292 | else if (count == 2) |
| 293 | dc /= 2; |
| 294 | |
| 295 | s->block_coeff[b][idx] += dc; |
| 296 | s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx]; |
| 297 | ab->dc_coeff = s->block_coeff[b][idx]; |
| 298 | ab->ref_frame = ref_frame; |
| 299 | lb->dc_coeff = s->block_coeff[b][idx]; |
| 300 | lb->ref_frame = ref_frame; |
| 301 | s->block_coeff[b][idx] *= s->dequant_dc; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv, |
| 306 | ptrdiff_t stride, int dx, int dy) |
| 307 | { |
| 308 | int t = ff_vp56_filter_threshold[s->quantizer]; |
| 309 | if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t); |
| 310 | if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t); |
| 311 | } |
| 312 | |
| 313 | static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src, |
| 314 | ptrdiff_t stride, int x, int y) |
| 315 | { |
| 316 | uint8_t *dst = s->frames[VP56_FRAME_CURRENT]->data[plane] + s->block_offset[b]; |
| 317 | uint8_t *src_block; |
| 318 | int src_offset; |
| 319 | int overlap_offset = 0; |
| 320 | int mask = s->vp56_coord_div[b] - 1; |
| 321 | int deblock_filtering = s->deblock_filtering; |
| 322 | int dx; |
| 323 | int dy; |
| 324 | |
| 325 | if (s->avctx->skip_loop_filter >= AVDISCARD_ALL || |
| 326 | (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY |
| 327 | && !s->frames[VP56_FRAME_CURRENT]->key_frame)) |
| 328 | deblock_filtering = 0; |
| 329 | |
| 330 | dx = s->mv[b].x / s->vp56_coord_div[b]; |
| 331 | dy = s->mv[b].y / s->vp56_coord_div[b]; |
| 332 | |
| 333 | if (b >= 4) { |
| 334 | x /= 2; |
| 335 | y /= 2; |
| 336 | } |
| 337 | x += dx - 2; |
| 338 | y += dy - 2; |
| 339 | |
| 340 | if (x<0 || x+12>=s->plane_width[plane] || |
| 341 | y<0 || y+12>=s->plane_height[plane]) { |
| 342 | s->vdsp.emulated_edge_mc(s->edge_emu_buffer, |
| 343 | src + s->block_offset[b] + (dy-2)*stride + (dx-2), |
| 344 | stride, stride, |
| 345 | 12, 12, x, y, |
| 346 | s->plane_width[plane], |
| 347 | s->plane_height[plane]); |
| 348 | src_block = s->edge_emu_buffer; |
| 349 | src_offset = 2 + 2*stride; |
| 350 | } else if (deblock_filtering) { |
| 351 | /* only need a 12x12 block, but there is no such dsp function, */ |
| 352 | /* so copy a 16x12 block */ |
| 353 | s->hdsp.put_pixels_tab[0][0](s->edge_emu_buffer, |
| 354 | src + s->block_offset[b] + (dy-2)*stride + (dx-2), |
| 355 | stride, 12); |
| 356 | src_block = s->edge_emu_buffer; |
| 357 | src_offset = 2 + 2*stride; |
| 358 | } else { |
| 359 | src_block = src; |
| 360 | src_offset = s->block_offset[b] + dy*stride + dx; |
| 361 | } |
| 362 | |
| 363 | if (deblock_filtering) |
| 364 | vp56_deblock_filter(s, src_block, stride, dx&7, dy&7); |
| 365 | |
| 366 | if (s->mv[b].x & mask) |
| 367 | overlap_offset += (s->mv[b].x > 0) ? 1 : -1; |
| 368 | if (s->mv[b].y & mask) |
| 369 | overlap_offset += (s->mv[b].y > 0) ? stride : -stride; |
| 370 | |
| 371 | if (overlap_offset) { |
| 372 | if (s->filter) |
| 373 | s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset, |
| 374 | stride, s->mv[b], mask, s->filter_selection, b<4); |
| 375 | else |
| 376 | s->vp3dsp.put_no_rnd_pixels_l2(dst, src_block+src_offset, |
| 377 | src_block+src_offset+overlap_offset, |
| 378 | stride, 8); |
| 379 | } else { |
| 380 | s->hdsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha) |
| 385 | { |
| 386 | AVFrame *frame_current, *frame_ref; |
| 387 | VP56mb mb_type; |
| 388 | VP56Frame ref_frame; |
| 389 | int b, ab, b_max, plane, off; |
| 390 | |
| 391 | if (s->frames[VP56_FRAME_CURRENT]->key_frame) |
| 392 | mb_type = VP56_MB_INTRA; |
| 393 | else |
| 394 | mb_type = vp56_decode_mv(s, row, col); |
| 395 | ref_frame = ff_vp56_reference_frame[mb_type]; |
| 396 | |
| 397 | s->parse_coeff(s); |
| 398 | |
| 399 | vp56_add_predictors_dc(s, ref_frame); |
| 400 | |
| 401 | frame_current = s->frames[VP56_FRAME_CURRENT]; |
| 402 | frame_ref = s->frames[ref_frame]; |
| 403 | if (mb_type != VP56_MB_INTRA && !frame_ref->data[0]) |
| 404 | return; |
| 405 | |
| 406 | ab = 6*is_alpha; |
| 407 | b_max = 6 - 2*is_alpha; |
| 408 | |
| 409 | switch (mb_type) { |
| 410 | case VP56_MB_INTRA: |
| 411 | for (b=0; b<b_max; b++) { |
| 412 | plane = ff_vp56_b2p[b+ab]; |
| 413 | s->vp3dsp.idct_put(frame_current->data[plane] + s->block_offset[b], |
| 414 | s->stride[plane], s->block_coeff[b]); |
| 415 | } |
| 416 | break; |
| 417 | |
| 418 | case VP56_MB_INTER_NOVEC_PF: |
| 419 | case VP56_MB_INTER_NOVEC_GF: |
| 420 | for (b=0; b<b_max; b++) { |
| 421 | plane = ff_vp56_b2p[b+ab]; |
| 422 | off = s->block_offset[b]; |
| 423 | s->hdsp.put_pixels_tab[1][0](frame_current->data[plane] + off, |
| 424 | frame_ref->data[plane] + off, |
| 425 | s->stride[plane], 8); |
| 426 | s->vp3dsp.idct_add(frame_current->data[plane] + off, |
| 427 | s->stride[plane], s->block_coeff[b]); |
| 428 | } |
| 429 | break; |
| 430 | |
| 431 | case VP56_MB_INTER_DELTA_PF: |
| 432 | case VP56_MB_INTER_V1_PF: |
| 433 | case VP56_MB_INTER_V2_PF: |
| 434 | case VP56_MB_INTER_DELTA_GF: |
| 435 | case VP56_MB_INTER_4V: |
| 436 | case VP56_MB_INTER_V1_GF: |
| 437 | case VP56_MB_INTER_V2_GF: |
| 438 | for (b=0; b<b_max; b++) { |
| 439 | int x_off = b==1 || b==3 ? 8 : 0; |
| 440 | int y_off = b==2 || b==3 ? 8 : 0; |
| 441 | plane = ff_vp56_b2p[b+ab]; |
| 442 | vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane], |
| 443 | 16*col+x_off, 16*row+y_off); |
| 444 | s->vp3dsp.idct_add(frame_current->data[plane] + s->block_offset[b], |
| 445 | s->stride[plane], s->block_coeff[b]); |
| 446 | } |
| 447 | break; |
| 448 | } |
| 449 | |
| 450 | if (is_alpha) { |
| 451 | s->block_coeff[4][0] = 0; |
| 452 | s->block_coeff[5][0] = 0; |
| 453 | } |
| 454 | } |
| 455 | |
| 456 | static int vp56_size_changed(VP56Context *s) |
| 457 | { |
| 458 | AVCodecContext *avctx = s->avctx; |
| 459 | int stride = s->frames[VP56_FRAME_CURRENT]->linesize[0]; |
| 460 | int i; |
| 461 | |
| 462 | s->plane_width[0] = s->plane_width[3] = avctx->coded_width; |
| 463 | s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2; |
| 464 | s->plane_height[0] = s->plane_height[3] = avctx->coded_height; |
| 465 | s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2; |
| 466 | |
| 467 | for (i=0; i<4; i++) |
| 468 | s->stride[i] = s->flip * s->frames[VP56_FRAME_CURRENT]->linesize[i]; |
| 469 | |
| 470 | s->mb_width = (avctx->coded_width +15) / 16; |
| 471 | s->mb_height = (avctx->coded_height+15) / 16; |
| 472 | |
| 473 | if (s->mb_width > 1000 || s->mb_height > 1000) { |
| 474 | ff_set_dimensions(avctx, 0, 0); |
| 475 | av_log(avctx, AV_LOG_ERROR, "picture too big\n"); |
| 476 | return -1; |
| 477 | } |
| 478 | |
| 479 | av_reallocp_array(&s->above_blocks, 4*s->mb_width+6, |
| 480 | sizeof(*s->above_blocks)); |
| 481 | av_reallocp_array(&s->macroblocks, s->mb_width*s->mb_height, |
| 482 | sizeof(*s->macroblocks)); |
| 483 | av_free(s->edge_emu_buffer_alloc); |
| 484 | s->edge_emu_buffer_alloc = av_malloc(16*stride); |
| 485 | s->edge_emu_buffer = s->edge_emu_buffer_alloc; |
| 486 | if (!s->above_blocks || !s->macroblocks || !s->edge_emu_buffer_alloc) |
| 487 | return AVERROR(ENOMEM); |
| 488 | if (s->flip < 0) |
| 489 | s->edge_emu_buffer += 15 * stride; |
| 490 | |
| 491 | if (s->alpha_context) |
| 492 | return vp56_size_changed(s->alpha_context); |
| 493 | |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int); |
| 498 | |
| 499 | int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| 500 | AVPacket *avpkt) |
| 501 | { |
| 502 | const uint8_t *buf = avpkt->data; |
| 503 | VP56Context *s = avctx->priv_data; |
| 504 | AVFrame *const p = s->frames[VP56_FRAME_CURRENT]; |
| 505 | int remaining_buf_size = avpkt->size; |
| 506 | int av_uninit(alpha_offset); |
| 507 | int i, res; |
| 508 | int ret; |
| 509 | |
| 510 | if (s->has_alpha) { |
| 511 | if (remaining_buf_size < 3) |
| 512 | return -1; |
| 513 | alpha_offset = bytestream_get_be24(&buf); |
| 514 | remaining_buf_size -= 3; |
| 515 | if (remaining_buf_size < alpha_offset) |
| 516 | return -1; |
| 517 | } |
| 518 | |
| 519 | res = s->parse_header(s, buf, remaining_buf_size); |
| 520 | if (res < 0) |
| 521 | return res; |
| 522 | |
| 523 | if (res == VP56_SIZE_CHANGE) { |
| 524 | for (i = 0; i < 4; i++) { |
| 525 | av_frame_unref(s->frames[i]); |
| 526 | if (s->alpha_context) |
| 527 | av_frame_unref(s->alpha_context->frames[i]); |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | if (ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF) < 0) |
| 532 | return -1; |
| 533 | |
| 534 | if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) { |
| 535 | av_frame_unref(s->alpha_context->frames[VP56_FRAME_CURRENT]); |
| 536 | if ((ret = av_frame_ref(s->alpha_context->frames[VP56_FRAME_CURRENT], p)) < 0) { |
| 537 | av_frame_unref(p); |
| 538 | return ret; |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | if (res == VP56_SIZE_CHANGE) { |
| 543 | if (vp56_size_changed(s)) { |
| 544 | av_frame_unref(p); |
| 545 | return -1; |
| 546 | } |
| 547 | } |
| 548 | |
| 549 | if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) { |
| 550 | int bak_w = avctx->width; |
| 551 | int bak_h = avctx->height; |
| 552 | int bak_cw = avctx->coded_width; |
| 553 | int bak_ch = avctx->coded_height; |
| 554 | buf += alpha_offset; |
| 555 | remaining_buf_size -= alpha_offset; |
| 556 | |
| 557 | res = s->alpha_context->parse_header(s->alpha_context, buf, remaining_buf_size); |
| 558 | if (res != 0) { |
| 559 | if(res==VP56_SIZE_CHANGE) { |
| 560 | av_log(avctx, AV_LOG_ERROR, "Alpha reconfiguration\n"); |
| 561 | avctx->width = bak_w; |
| 562 | avctx->height = bak_h; |
| 563 | avctx->coded_width = bak_cw; |
| 564 | avctx->coded_height = bak_ch; |
| 565 | } |
| 566 | av_frame_unref(p); |
| 567 | return -1; |
| 568 | } |
| 569 | } |
| 570 | |
| 571 | avctx->execute2(avctx, ff_vp56_decode_mbs, 0, 0, (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) + 1); |
| 572 | |
| 573 | if ((res = av_frame_ref(data, p)) < 0) |
| 574 | return res; |
| 575 | *got_frame = 1; |
| 576 | |
| 577 | return avpkt->size; |
| 578 | } |
| 579 | |
| 580 | static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *data, |
| 581 | int jobnr, int threadnr) |
| 582 | { |
| 583 | VP56Context *s0 = avctx->priv_data; |
| 584 | int is_alpha = (jobnr == 1); |
| 585 | VP56Context *s = is_alpha ? s0->alpha_context : s0; |
| 586 | AVFrame *const p = s->frames[VP56_FRAME_CURRENT]; |
| 587 | int mb_row, mb_col, mb_row_flip, mb_offset = 0; |
| 588 | int block, y, uv; |
| 589 | ptrdiff_t stride_y, stride_uv; |
| 590 | int res; |
| 591 | |
| 592 | if (p->key_frame) { |
| 593 | p->pict_type = AV_PICTURE_TYPE_I; |
| 594 | s->default_models_init(s); |
| 595 | for (block=0; block<s->mb_height*s->mb_width; block++) |
| 596 | s->macroblocks[block].type = VP56_MB_INTRA; |
| 597 | } else { |
| 598 | p->pict_type = AV_PICTURE_TYPE_P; |
| 599 | vp56_parse_mb_type_models(s); |
| 600 | s->parse_vector_models(s); |
| 601 | s->mb_type = VP56_MB_INTER_NOVEC_PF; |
| 602 | } |
| 603 | |
| 604 | if (s->parse_coeff_models(s)) |
| 605 | goto next; |
| 606 | |
| 607 | memset(s->prev_dc, 0, sizeof(s->prev_dc)); |
| 608 | s->prev_dc[1][VP56_FRAME_CURRENT] = 128; |
| 609 | s->prev_dc[2][VP56_FRAME_CURRENT] = 128; |
| 610 | |
| 611 | for (block=0; block < 4*s->mb_width+6; block++) { |
| 612 | s->above_blocks[block].ref_frame = VP56_FRAME_NONE; |
| 613 | s->above_blocks[block].dc_coeff = 0; |
| 614 | s->above_blocks[block].not_null_dc = 0; |
| 615 | } |
| 616 | s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT; |
| 617 | s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT; |
| 618 | |
| 619 | stride_y = p->linesize[0]; |
| 620 | stride_uv = p->linesize[1]; |
| 621 | |
| 622 | if (s->flip < 0) |
| 623 | mb_offset = 7; |
| 624 | |
| 625 | /* main macroblocks loop */ |
| 626 | for (mb_row=0; mb_row<s->mb_height; mb_row++) { |
| 627 | if (s->flip < 0) |
| 628 | mb_row_flip = s->mb_height - mb_row - 1; |
| 629 | else |
| 630 | mb_row_flip = mb_row; |
| 631 | |
| 632 | for (block=0; block<4; block++) { |
| 633 | s->left_block[block].ref_frame = VP56_FRAME_NONE; |
| 634 | s->left_block[block].dc_coeff = 0; |
| 635 | s->left_block[block].not_null_dc = 0; |
| 636 | } |
| 637 | memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx)); |
| 638 | memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last)); |
| 639 | |
| 640 | s->above_block_idx[0] = 1; |
| 641 | s->above_block_idx[1] = 2; |
| 642 | s->above_block_idx[2] = 1; |
| 643 | s->above_block_idx[3] = 2; |
| 644 | s->above_block_idx[4] = 2*s->mb_width + 2 + 1; |
| 645 | s->above_block_idx[5] = 3*s->mb_width + 4 + 1; |
| 646 | |
| 647 | s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y; |
| 648 | s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y; |
| 649 | s->block_offset[1] = s->block_offset[0] + 8; |
| 650 | s->block_offset[3] = s->block_offset[2] + 8; |
| 651 | s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv; |
| 652 | s->block_offset[5] = s->block_offset[4]; |
| 653 | |
| 654 | for (mb_col=0; mb_col<s->mb_width; mb_col++) { |
| 655 | vp56_decode_mb(s, mb_row, mb_col, is_alpha); |
| 656 | |
| 657 | for (y=0; y<4; y++) { |
| 658 | s->above_block_idx[y] += 2; |
| 659 | s->block_offset[y] += 16; |
| 660 | } |
| 661 | |
| 662 | for (uv=4; uv<6; uv++) { |
| 663 | s->above_block_idx[uv] += 1; |
| 664 | s->block_offset[uv] += 8; |
| 665 | } |
| 666 | } |
| 667 | } |
| 668 | |
| 669 | next: |
| 670 | if (p->key_frame || s->golden_frame) { |
| 671 | av_frame_unref(s->frames[VP56_FRAME_GOLDEN]); |
| 672 | if ((res = av_frame_ref(s->frames[VP56_FRAME_GOLDEN], p)) < 0) |
| 673 | return res; |
| 674 | } |
| 675 | |
| 676 | av_frame_unref(s->frames[VP56_FRAME_PREVIOUS]); |
| 677 | FFSWAP(AVFrame *, s->frames[VP56_FRAME_CURRENT], |
| 678 | s->frames[VP56_FRAME_PREVIOUS]); |
| 679 | return 0; |
| 680 | } |
| 681 | |
| 682 | av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha) |
| 683 | { |
| 684 | VP56Context *s = avctx->priv_data; |
| 685 | return ff_vp56_init_context(avctx, s, flip, has_alpha); |
| 686 | } |
| 687 | |
| 688 | av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s, |
| 689 | int flip, int has_alpha) |
| 690 | { |
| 691 | int i; |
| 692 | |
| 693 | s->avctx = avctx; |
| 694 | avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P; |
| 695 | if (avctx->skip_alpha) avctx->pix_fmt = AV_PIX_FMT_YUV420P; |
| 696 | |
| 697 | ff_h264chroma_init(&s->h264chroma, 8); |
| 698 | ff_hpeldsp_init(&s->hdsp, avctx->flags); |
| 699 | ff_videodsp_init(&s->vdsp, 8); |
| 700 | ff_vp3dsp_init(&s->vp3dsp, avctx->flags); |
| 701 | ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id); |
| 702 | for (i = 0; i < 64; i++) { |
| 703 | #define TRANSPOSE(x) (x >> 3) | ((x & 7) << 3) |
| 704 | s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]); |
| 705 | #undef TRANSPOSE |
| 706 | } |
| 707 | |
| 708 | for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) { |
| 709 | s->frames[i] = av_frame_alloc(); |
| 710 | if (!s->frames[i]) { |
| 711 | ff_vp56_free(avctx); |
| 712 | return AVERROR(ENOMEM); |
| 713 | } |
| 714 | } |
| 715 | s->edge_emu_buffer_alloc = NULL; |
| 716 | |
| 717 | s->above_blocks = NULL; |
| 718 | s->macroblocks = NULL; |
| 719 | s->quantizer = -1; |
| 720 | s->deblock_filtering = 1; |
| 721 | s->golden_frame = 0; |
| 722 | |
| 723 | s->filter = NULL; |
| 724 | |
| 725 | s->has_alpha = has_alpha; |
| 726 | |
| 727 | s->modelp = &s->model; |
| 728 | |
| 729 | if (flip) { |
| 730 | s->flip = -1; |
| 731 | s->frbi = 2; |
| 732 | s->srbi = 0; |
| 733 | } else { |
| 734 | s->flip = 1; |
| 735 | s->frbi = 0; |
| 736 | s->srbi = 2; |
| 737 | } |
| 738 | |
| 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | av_cold int ff_vp56_free(AVCodecContext *avctx) |
| 743 | { |
| 744 | VP56Context *s = avctx->priv_data; |
| 745 | return ff_vp56_free_context(s); |
| 746 | } |
| 747 | |
| 748 | av_cold int ff_vp56_free_context(VP56Context *s) |
| 749 | { |
| 750 | int i; |
| 751 | |
| 752 | av_freep(&s->above_blocks); |
| 753 | av_freep(&s->macroblocks); |
| 754 | av_freep(&s->edge_emu_buffer_alloc); |
| 755 | |
| 756 | for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) |
| 757 | av_frame_free(&s->frames[i]); |
| 758 | |
| 759 | return 0; |
| 760 | } |