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 34void ff_vp56_init_dequant(VP56Context *s, int quantizer) 35{ 36 if (s->quantizer != quantizer) 37 ff_vp3dsp_set_bounding_values(s->bounding_values_array, ff_vp56_filter_threshold[quantizer]); 38 s->quantizer = quantizer; 39 s->dequant_dc = ff_vp56_dc_dequant[quantizer] << 2; 40 s->dequant_ac = ff_vp56_ac_dequant[quantizer] << 2; 41} 42 43static int vp56_get_vectors_predictors(VP56Context *s, int row, int col, 44 VP56Frame ref_frame) 45{ 46 int nb_pred = 0; 47 VP56mv vect[2] = {{0,0}, {0,0}}; 48 int pos, offset; 49 VP56mv mvp; 50 51 for (pos=0; pos<12; pos++) { 52 mvp.x = col + ff_vp56_candidate_predictor_pos[pos][0]; 53 mvp.y = row + ff_vp56_candidate_predictor_pos[pos][1]; 54 if (mvp.x < 0 || mvp.x >= s->mb_width || 55 mvp.y < 0 || mvp.y >= s->mb_height) 56 continue; 57 offset = mvp.x + s->mb_width*mvp.y; 58 59 if (ff_vp56_reference_frame[s->macroblocks[offset].type] != ref_frame) 60 continue; 61 if ((s->macroblocks[offset].mv.x == vect[0].x && 62 s->macroblocks[offset].mv.y == vect[0].y) || 63 (s->macroblocks[offset].mv.x == 0 && 64 s->macroblocks[offset].mv.y == 0)) 65 continue; 66 67 vect[nb_pred++] = s->macroblocks[offset].mv; 68 if (nb_pred > 1) { 69 nb_pred = -1; 70 break; 71 } 72 s->vector_candidate_pos = pos; 73 } 74 75 s->vector_candidate[0] = vect[0]; 76 s->vector_candidate[1] = vect[1]; 77 78 return nb_pred+1; 79} 80 81static void vp56_parse_mb_type_models(VP56Context *s) 82{ 83 VP56RangeCoder *c = &s->c; 84 VP56Model *model = s->modelp; 85 int i, ctx, type; 86 87 for (ctx=0; ctx<3; ctx++) { 88 if (vp56_rac_get_prob_branchy(c, 174)) { 89 int idx = vp56_rac_gets(c, 4); 90 memcpy(model->mb_types_stats[ctx], 91 ff_vp56_pre_def_mb_type_stats[idx][ctx], 92 sizeof(model->mb_types_stats[ctx])); 93 } 94 if (vp56_rac_get_prob_branchy(c, 254)) { 95 for (type=0; type<10; type++) { 96 for(i=0; i<2; i++) { 97 if (vp56_rac_get_prob_branchy(c, 205)) { 98 int delta, sign = vp56_rac_get(c); 99 100 delta = vp56_rac_get_tree(c, ff_vp56_pmbtm_tree, 101 ff_vp56_mb_type_model_model); 102 if (!delta) 103 delta = 4 * vp56_rac_gets(c, 7); 104 model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign; 105 } 106 } 107 } 108 } 109 } 110 111 /* compute MB type probability tables based on previous MB type */ 112 for (ctx=0; ctx<3; ctx++) { 113 int p[10]; 114 115 for (type=0; type<10; type++) 116 p[type] = 100 * model->mb_types_stats[ctx][type][1]; 117 118 for (type=0; type<10; type++) { 119 int p02, p34, p0234, p17, p56, p89, p5689, p156789; 120 121 /* conservative MB type probability */ 122 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]); 123 124 p[type] = 0; /* same MB type => weight is null */ 125 126 /* binary tree parsing probabilities */ 127 p02 = p[0] + p[2]; 128 p34 = p[3] + p[4]; 129 p0234 = p02 + p34; 130 p17 = p[1] + p[7]; 131 p56 = p[5] + p[6]; 132 p89 = p[8] + p[9]; 133 p5689 = p56 + p89; 134 p156789 = p17 + p5689; 135 136 model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789); 137 model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234); 138 model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789); 139 model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02); 140 model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34); 141 model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17); 142 model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689); 143 model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56); 144 model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89); 145 146 /* restore initial value */ 147 p[type] = 100 * model->mb_types_stats[ctx][type][1]; 148 } 149 } 150} 151 152static VP56mb vp56_parse_mb_type(VP56Context *s, 153 VP56mb prev_type, int ctx) 154{ 155 uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type]; 156 VP56RangeCoder *c = &s->c; 157 158 if (vp56_rac_get_prob_branchy(c, mb_type_model[0])) 159 return prev_type; 160 else 161 return vp56_rac_get_tree(c, ff_vp56_pmbt_tree, mb_type_model); 162} 163 164static void vp56_decode_4mv(VP56Context *s, int row, int col) 165{ 166 VP56mv mv = {0,0}; 167 int type[4]; 168 int b; 169 170 /* parse each block type */ 171 for (b=0; b<4; b++) { 172 type[b] = vp56_rac_gets(&s->c, 2); 173 if (type[b]) 174 type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */ 175 } 176 177 /* get vectors */ 178 for (b=0; b<4; b++) { 179 switch (type[b]) { 180 case VP56_MB_INTER_NOVEC_PF: 181 s->mv[b] = (VP56mv) {0,0}; 182 break; 183 case VP56_MB_INTER_DELTA_PF: 184 s->parse_vector_adjustment(s, &s->mv[b]); 185 break; 186 case VP56_MB_INTER_V1_PF: 187 s->mv[b] = s->vector_candidate[0]; 188 break; 189 case VP56_MB_INTER_V2_PF: 190 s->mv[b] = s->vector_candidate[1]; 191 break; 192 } 193 mv.x += s->mv[b].x; 194 mv.y += s->mv[b].y; 195 } 196 197 /* this is the one selected for the whole MB for prediction */ 198 s->macroblocks[row * s->mb_width + col].mv = s->mv[3]; 199 200 /* chroma vectors are average luma vectors */ 201 s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2); 202 s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2); 203} 204 205static VP56mb vp56_decode_mv(VP56Context *s, int row, int col) 206{ 207 VP56mv *mv, vect = {0,0}; 208 int ctx, b; 209 210 ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS); 211 s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx); 212 s->macroblocks[row * s->mb_width + col].type = s->mb_type; 213 214 switch (s->mb_type) { 215 case VP56_MB_INTER_V1_PF: 216 mv = &s->vector_candidate[0]; 217 break; 218 219 case VP56_MB_INTER_V2_PF: 220 mv = &s->vector_candidate[1]; 221 break; 222 223 case VP56_MB_INTER_V1_GF: 224 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); 225 mv = &s->vector_candidate[0]; 226 break; 227 228 case VP56_MB_INTER_V2_GF: 229 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); 230 mv = &s->vector_candidate[1]; 231 break; 232 233 case VP56_MB_INTER_DELTA_PF: 234 s->parse_vector_adjustment(s, &vect); 235 mv = &vect; 236 break; 237 238 case VP56_MB_INTER_DELTA_GF: 239 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); 240 s->parse_vector_adjustment(s, &vect); 241 mv = &vect; 242 break; 243 244 case VP56_MB_INTER_4V: 245 vp56_decode_4mv(s, row, col); 246 return s->mb_type; 247 248 default: 249 mv = &vect; 250 break; 251 } 252 253 s->macroblocks[row*s->mb_width + col].mv = *mv; 254 255 /* same vector for all blocks */ 256 for (b=0; b<6; b++) 257 s->mv[b] = *mv; 258 259 return s->mb_type; 260} 261 262static VP56mb vp56_conceal_mv(VP56Context *s, int row, int col) 263{ 264 VP56mv *mv, vect = {0,0}; 265 int b; 266 267 s->mb_type = VP56_MB_INTER_NOVEC_PF; 268 s->macroblocks[row * s->mb_width + col].type = s->mb_type; 269 270 mv = &vect; 271 272 s->macroblocks[row*s->mb_width + col].mv = *mv; 273 274 /* same vector for all blocks */ 275 for (b=0; b<6; b++) 276 s->mv[b] = *mv; 277 278 return s->mb_type; 279} 280 281static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame) 282{ 283 int idx = s->idct_scantable[0]; 284 int b; 285 286 for (b=0; b<6; b++) { 287 VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]]; 288 VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]]; 289 int count = 0; 290 int dc = 0; 291 int i; 292 293 if (ref_frame == lb->ref_frame) { 294 dc += lb->dc_coeff; 295 count++; 296 } 297 if (ref_frame == ab->ref_frame) { 298 dc += ab->dc_coeff; 299 count++; 300 } 301 if (s->avctx->codec->id == AV_CODEC_ID_VP5) 302 for (i=0; i<2; i++) 303 if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) { 304 dc += ab[-1+2*i].dc_coeff; 305 count++; 306 } 307 if (count == 0) 308 dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame]; 309 else if (count == 2) 310 dc /= 2; 311 312 s->block_coeff[b][idx] += dc; 313 s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx]; 314 ab->dc_coeff = s->block_coeff[b][idx]; 315 ab->ref_frame = ref_frame; 316 lb->dc_coeff = s->block_coeff[b][idx]; 317 lb->ref_frame = ref_frame; 318 s->block_coeff[b][idx] *= s->dequant_dc; 319 } 320} 321 322static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv, 323 ptrdiff_t stride, int dx, int dy) 324{ 325 if (s->avctx->codec->id == AV_CODEC_ID_VP5) { 326 int t = ff_vp56_filter_threshold[s->quantizer]; 327 if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t); 328 if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t); 329 } else { 330 int * bounding_values = s->bounding_values_array + 127; 331 if (dx) 332 ff_vp3dsp_h_loop_filter_12(yuv + 10-dx, stride, bounding_values); 333 if (dy) 334 ff_vp3dsp_v_loop_filter_12(yuv + stride*(10-dy), stride, bounding_values); 335 } 336} 337 338static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src, 339 ptrdiff_t stride, int x, int y) 340{ 341 uint8_t *dst = s->frames[VP56_FRAME_CURRENT]->data[plane] + s->block_offset[b]; 342 uint8_t *src_block; 343 int src_offset; 344 int overlap_offset = 0; 345 int mask = s->vp56_coord_div[b] - 1; 346 int deblock_filtering = s->deblock_filtering; 347 int dx; 348 int dy; 349 350 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL || 351 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY 352 && !s->frames[VP56_FRAME_CURRENT]->key_frame)) 353 deblock_filtering = 0; 354 355 dx = s->mv[b].x / s->vp56_coord_div[b]; 356 dy = s->mv[b].y / s->vp56_coord_div[b]; 357 358 if (b >= 4) { 359 x /= 2; 360 y /= 2; 361 } 362 x += dx - 2; 363 y += dy - 2; 364 365 if (x<0 || x+12>=s->plane_width[plane] || 366 y<0 || y+12>=s->plane_height[plane]) { 367 s->vdsp.emulated_edge_mc(s->edge_emu_buffer, 368 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 369 stride, stride, 370 12, 12, x, y, 371 s->plane_width[plane], 372 s->plane_height[plane]); 373 src_block = s->edge_emu_buffer; 374 src_offset = 2 + 2*stride; 375 } else if (deblock_filtering) { 376 /* only need a 12x12 block, but there is no such dsp function, */ 377 /* so copy a 16x12 block */ 378 s->hdsp.put_pixels_tab[0][0](s->edge_emu_buffer, 379 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 380 stride, 12); 381 src_block = s->edge_emu_buffer; 382 src_offset = 2 + 2*stride; 383 } else { 384 src_block = src; 385 src_offset = s->block_offset[b] + dy*stride + dx; 386 } 387 388 if (deblock_filtering) 389 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7); 390 391 if (s->mv[b].x & mask) 392 overlap_offset += (s->mv[b].x > 0) ? 1 : -1; 393 if (s->mv[b].y & mask) 394 overlap_offset += (s->mv[b].y > 0) ? stride : -stride; 395 396 if (overlap_offset) { 397 if (s->filter) 398 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset, 399 stride, s->mv[b], mask, s->filter_selection, b<4); 400 else 401 s->vp3dsp.put_no_rnd_pixels_l2(dst, src_block+src_offset, 402 src_block+src_offset+overlap_offset, 403 stride, 8); 404 } else { 405 s->hdsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8); 406 } 407} 408 409static void vp56_idct_put(VP56Context *s, uint8_t * dest, ptrdiff_t stride, int16_t *block, int selector) 410{ 411 if (selector > 10 || selector == 1) 412 s->vp3dsp.idct_put(dest, stride, block); 413 else 414 ff_vp3dsp_idct10_put(dest, stride, block); 415} 416 417static void vp56_idct_add(VP56Context *s, uint8_t * dest, ptrdiff_t stride, int16_t *block, int selector) 418{ 419 if (selector > 10) 420 s->vp3dsp.idct_add(dest, stride, block); 421 else if (selector > 1) 422 ff_vp3dsp_idct10_add(dest, stride, block); 423 else 424 s->vp3dsp.idct_dc_add(dest, stride, block); 425} 426 427static av_always_inline void vp56_render_mb(VP56Context *s, int row, int col, int is_alpha, VP56mb mb_type) 428{ 429 int b, ab, b_max, plane, off; 430 AVFrame *frame_current, *frame_ref; 431 VP56Frame ref_frame = ff_vp56_reference_frame[mb_type]; 432 433 vp56_add_predictors_dc(s, ref_frame); 434 435 frame_current = s->frames[VP56_FRAME_CURRENT]; 436 frame_ref = s->frames[ref_frame]; 437 if (mb_type != VP56_MB_INTRA && !frame_ref->data[0]) 438 return; 439 440 ab = 6*is_alpha; 441 b_max = 6 - 2*is_alpha; 442 443 switch (mb_type) { 444 case VP56_MB_INTRA: 445 for (b=0; b<b_max; b++) { 446 plane = ff_vp56_b2p[b+ab]; 447 vp56_idct_put(s, frame_current->data[plane] + s->block_offset[b], 448 s->stride[plane], s->block_coeff[b], s->idct_selector[b]); 449 } 450 break; 451 452 case VP56_MB_INTER_NOVEC_PF: 453 case VP56_MB_INTER_NOVEC_GF: 454 for (b=0; b<b_max; b++) { 455 plane = ff_vp56_b2p[b+ab]; 456 off = s->block_offset[b]; 457 s->hdsp.put_pixels_tab[1][0](frame_current->data[plane] + off, 458 frame_ref->data[plane] + off, 459 s->stride[plane], 8); 460 vp56_idct_add(s, frame_current->data[plane] + off, 461 s->stride[plane], s->block_coeff[b], s->idct_selector[b]); 462 } 463 break; 464 465 case VP56_MB_INTER_DELTA_PF: 466 case VP56_MB_INTER_V1_PF: 467 case VP56_MB_INTER_V2_PF: 468 case VP56_MB_INTER_DELTA_GF: 469 case VP56_MB_INTER_4V: 470 case VP56_MB_INTER_V1_GF: 471 case VP56_MB_INTER_V2_GF: 472 for (b=0; b<b_max; b++) { 473 int x_off = b==1 || b==3 ? 8 : 0; 474 int y_off = b==2 || b==3 ? 8 : 0; 475 plane = ff_vp56_b2p[b+ab]; 476 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane], 477 16*col+x_off, 16*row+y_off); 478 vp56_idct_add(s, frame_current->data[plane] + s->block_offset[b], 479 s->stride[plane], s->block_coeff[b], s->idct_selector[b]); 480 } 481 break; 482 } 483 484 if (is_alpha) { 485 s->block_coeff[4][0] = 0; 486 s->block_coeff[5][0] = 0; 487 } 488} 489 490static int vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha) 491{ 492 VP56mb mb_type; 493 int ret; 494 495 if (s->frames[VP56_FRAME_CURRENT]->key_frame) 496 mb_type = VP56_MB_INTRA; 497 else 498 mb_type = vp56_decode_mv(s, row, col); 499 500 ret = s->parse_coeff(s); 501 if (ret < 0) 502 return ret; 503 504 vp56_render_mb(s, row, col, is_alpha, mb_type); 505 506 return 0; 507} 508 509static int vp56_conceal_mb(VP56Context *s, int row, int col, int is_alpha) 510{ 511 VP56mb mb_type; 512 513 if (s->frames[VP56_FRAME_CURRENT]->key_frame) 514 mb_type = VP56_MB_INTRA; 515 else 516 mb_type = vp56_conceal_mv(s, row, col); 517 518 vp56_render_mb(s, row, col, is_alpha, mb_type); 519 520 return 0; 521} 522 523static int vp56_size_changed(VP56Context *s) 524{ 525 AVCodecContext *avctx = s->avctx; 526 int stride = s->frames[VP56_FRAME_CURRENT]->linesize[0]; 527 int i; 528 529 s->plane_width[0] = s->plane_width[3] = avctx->coded_width; 530 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2; 531 s->plane_height[0] = s->plane_height[3] = avctx->coded_height; 532 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2; 533 534 s->have_undamaged_frame = 0; 535 536 for (i=0; i<4; i++) 537 s->stride[i] = s->flip * s->frames[VP56_FRAME_CURRENT]->linesize[i]; 538 539 s->mb_width = (avctx->coded_width +15) / 16; 540 s->mb_height = (avctx->coded_height+15) / 16; 541 542 if (s->mb_width > 1000 || s->mb_height > 1000) { 543 ff_set_dimensions(avctx, 0, 0); 544 av_log(avctx, AV_LOG_ERROR, "picture too big\n"); 545 return AVERROR_INVALIDDATA; 546 } 547 548 av_reallocp_array(&s->above_blocks, 4*s->mb_width+6, 549 sizeof(*s->above_blocks)); 550 av_reallocp_array(&s->macroblocks, s->mb_width*s->mb_height, 551 sizeof(*s->macroblocks)); 552 av_free(s->edge_emu_buffer_alloc); 553 s->edge_emu_buffer_alloc = av_malloc(16*stride); 554 s->edge_emu_buffer = s->edge_emu_buffer_alloc; 555 if (!s->above_blocks || !s->macroblocks || !s->edge_emu_buffer_alloc) 556 return AVERROR(ENOMEM); 557 if (s->flip < 0) 558 s->edge_emu_buffer += 15 * stride; 559 560 if (s->alpha_context) 561 return vp56_size_changed(s->alpha_context); 562 563 return 0; 564} 565 566static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int); 567 568int ff_vp56_decode_frame(AVCodecContext *avctx, AVFrame *rframe, 569 int *got_frame, AVPacket *avpkt) 570{ 571 const uint8_t *buf = avpkt->data; 572 VP56Context *s = avctx->priv_data; 573 AVFrame *const p = s->frames[VP56_FRAME_CURRENT]; 574 int remaining_buf_size = avpkt->size; 575 int alpha_offset = remaining_buf_size; 576 int i, res; 577 int ret; 578 579 if (s->has_alpha) { 580 if (remaining_buf_size < 3) 581 return AVERROR_INVALIDDATA; 582 alpha_offset = bytestream_get_be24(&buf); 583 remaining_buf_size -= 3; 584 if (remaining_buf_size < alpha_offset) 585 return AVERROR_INVALIDDATA; 586 } 587 588 res = s->parse_header(s, buf, alpha_offset); 589 if (res < 0) 590 return res; 591 592 if (res == VP56_SIZE_CHANGE) { 593 for (i = 0; i < 4; i++) { 594 av_frame_unref(s->frames[i]); 595 if (s->alpha_context) 596 av_frame_unref(s->alpha_context->frames[i]); 597 } 598 } 599 600 ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF); 601 if (ret < 0) { 602 if (res == VP56_SIZE_CHANGE) 603 ff_set_dimensions(avctx, 0, 0); 604 return ret; 605 } 606 607 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) { 608 av_frame_unref(s->alpha_context->frames[VP56_FRAME_CURRENT]); 609 if ((ret = av_frame_ref(s->alpha_context->frames[VP56_FRAME_CURRENT], p)) < 0) { 610 av_frame_unref(p); 611 if (res == VP56_SIZE_CHANGE) 612 ff_set_dimensions(avctx, 0, 0); 613 return ret; 614 } 615 } 616 617 if (res == VP56_SIZE_CHANGE) { 618 if (vp56_size_changed(s)) { 619 av_frame_unref(p); 620 return AVERROR_INVALIDDATA; 621 } 622 } 623 624 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) { 625 int bak_w = avctx->width; 626 int bak_h = avctx->height; 627 int bak_cw = avctx->coded_width; 628 int bak_ch = avctx->coded_height; 629 buf += alpha_offset; 630 remaining_buf_size -= alpha_offset; 631 632 res = s->alpha_context->parse_header(s->alpha_context, buf, remaining_buf_size); 633 if (res != 0) { 634 if(res==VP56_SIZE_CHANGE) { 635 av_log(avctx, AV_LOG_ERROR, "Alpha reconfiguration\n"); 636 avctx->width = bak_w; 637 avctx->height = bak_h; 638 avctx->coded_width = bak_cw; 639 avctx->coded_height = bak_ch; 640 } 641 av_frame_unref(p); 642 return AVERROR_INVALIDDATA; 643 } 644 } 645 646 s->discard_frame = 0; 647 avctx->execute2(avctx, ff_vp56_decode_mbs, 0, 0, (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) + 1); 648 649 if (s->discard_frame) 650 return AVERROR_INVALIDDATA; 651 652 if ((res = av_frame_ref(rframe, p)) < 0) 653 return res; 654 *got_frame = 1; 655 656 return avpkt->size; 657} 658 659static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *data, 660 int jobnr, int threadnr) 661{ 662 VP56Context *s0 = avctx->priv_data; 663 int is_alpha = (jobnr == 1); 664 VP56Context *s = is_alpha ? s0->alpha_context : s0; 665 AVFrame *const p = s->frames[VP56_FRAME_CURRENT]; 666 int mb_row, mb_col, mb_row_flip, mb_offset = 0; 667 int block, y, uv; 668 ptrdiff_t stride_y, stride_uv; 669 int res; 670 int damaged = 0; 671 672 if (p->key_frame) { 673 p->pict_type = AV_PICTURE_TYPE_I; 674 s->default_models_init(s); 675 for (block=0; block<s->mb_height*s->mb_width; block++) 676 s->macroblocks[block].type = VP56_MB_INTRA; 677 } else { 678 p->pict_type = AV_PICTURE_TYPE_P; 679 vp56_parse_mb_type_models(s); 680 s->parse_vector_models(s); 681 s->mb_type = VP56_MB_INTER_NOVEC_PF; 682 } 683 684 if (s->parse_coeff_models(s)) 685 goto next; 686 687 memset(s->prev_dc, 0, sizeof(s->prev_dc)); 688 s->prev_dc[1][VP56_FRAME_CURRENT] = 128; 689 s->prev_dc[2][VP56_FRAME_CURRENT] = 128; 690 691 for (block=0; block < 4*s->mb_width+6; block++) { 692 s->above_blocks[block].ref_frame = VP56_FRAME_NONE; 693 s->above_blocks[block].dc_coeff = 0; 694 s->above_blocks[block].not_null_dc = 0; 695 } 696 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT; 697 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT; 698 699 stride_y = p->linesize[0]; 700 stride_uv = p->linesize[1]; 701 702 if (s->flip < 0) 703 mb_offset = 7; 704 705 /* main macroblocks loop */ 706 for (mb_row=0; mb_row<s->mb_height; mb_row++) { 707 if (s->flip < 0) 708 mb_row_flip = s->mb_height - mb_row - 1; 709 else 710 mb_row_flip = mb_row; 711 712 for (block=0; block<4; block++) { 713 s->left_block[block].ref_frame = VP56_FRAME_NONE; 714 s->left_block[block].dc_coeff = 0; 715 s->left_block[block].not_null_dc = 0; 716 } 717 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx)); 718 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last)); 719 720 s->above_block_idx[0] = 1; 721 s->above_block_idx[1] = 2; 722 s->above_block_idx[2] = 1; 723 s->above_block_idx[3] = 2; 724 s->above_block_idx[4] = 2*s->mb_width + 2 + 1; 725 s->above_block_idx[5] = 3*s->mb_width + 4 + 1; 726 727 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y; 728 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y; 729 s->block_offset[1] = s->block_offset[0] + 8; 730 s->block_offset[3] = s->block_offset[2] + 8; 731 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv; 732 s->block_offset[5] = s->block_offset[4]; 733 734 for (mb_col=0; mb_col<s->mb_width; mb_col++) { 735 if (!damaged) { 736 int ret = vp56_decode_mb(s, mb_row, mb_col, is_alpha); 737 if (ret < 0) { 738 damaged = 1; 739 if (!s->have_undamaged_frame || !avctx->error_concealment) { 740 s->discard_frame = 1; 741 return AVERROR_INVALIDDATA; 742 } 743 } 744 } 745 if (damaged) 746 vp56_conceal_mb(s, mb_row, mb_col, is_alpha); 747 748 for (y=0; y<4; y++) { 749 s->above_block_idx[y] += 2; 750 s->block_offset[y] += 16; 751 } 752 753 for (uv=4; uv<6; uv++) { 754 s->above_block_idx[uv] += 1; 755 s->block_offset[uv] += 8; 756 } 757 } 758 } 759 760 if (!damaged) 761 s->have_undamaged_frame = 1; 762 763next: 764 if (p->key_frame || s->golden_frame) { 765 av_frame_unref(s->frames[VP56_FRAME_GOLDEN]); 766 if ((res = av_frame_ref(s->frames[VP56_FRAME_GOLDEN], p)) < 0) 767 return res; 768 } 769 770 av_frame_unref(s->frames[VP56_FRAME_PREVIOUS]); 771 FFSWAP(AVFrame *, s->frames[VP56_FRAME_CURRENT], 772 s->frames[VP56_FRAME_PREVIOUS]); 773 return 0; 774} 775 776av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s, 777 int flip, int has_alpha) 778{ 779 int i; 780 781 s->avctx = avctx; 782 avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P; 783 if (avctx->skip_alpha) avctx->pix_fmt = AV_PIX_FMT_YUV420P; 784 785 ff_h264chroma_init(&s->h264chroma, 8); 786 ff_hpeldsp_init(&s->hdsp, avctx->flags); 787 ff_videodsp_init(&s->vdsp, 8); 788 ff_vp3dsp_init(&s->vp3dsp, avctx->flags); 789 for (i = 0; i < 64; i++) { 790#define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3)) 791 s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]); 792#undef TRANSPOSE 793 } 794 795 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) { 796 s->frames[i] = av_frame_alloc(); 797 if (!s->frames[i]) 798 return AVERROR(ENOMEM); 799 } 800 s->edge_emu_buffer_alloc = NULL; 801 802 s->above_blocks = NULL; 803 s->macroblocks = NULL; 804 s->quantizer = -1; 805 s->deblock_filtering = 1; 806 s->golden_frame = 0; 807 808 s->filter = NULL; 809 810 s->has_alpha = has_alpha; 811 812 s->modelp = &s->model; 813 814 if (flip) { 815 s->flip = -1; 816 s->frbi = 2; 817 s->srbi = 0; 818 } else { 819 s->flip = 1; 820 s->frbi = 0; 821 s->srbi = 2; 822 } 823 824 return 0; 825} 826 827av_cold int ff_vp56_free_context(VP56Context *s) 828{ 829 int i; 830 831 av_freep(&s->above_blocks); 832 av_freep(&s->macroblocks); 833 av_freep(&s->edge_emu_buffer_alloc); 834 835 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) 836 av_frame_free(&s->frames[i]); 837 838 return 0; 839} 840