1/* 2 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> 3 * 4 * This file is part of Libav. 5 * 6 * Libav 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 * Libav 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 Libav; 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 29#include "vp56.h" 30#include "vp56data.h" 31 32 33void ff_vp56_init_dequant(VP56Context *s, int quantizer) 34{ 35 s->quantizer = quantizer; 36 s->dequant_dc = vp56_dc_dequant[quantizer] << 2; 37 s->dequant_ac = vp56_ac_dequant[quantizer] << 2; 38 memset(s->qscale_table, quantizer, s->mb_width); 39} 40 41static 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 + vp56_candidate_predictor_pos[pos][0]; 51 mvp.y = row + 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 (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 79static 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(c, 174)) { 87 int idx = vp56_rac_gets(c, 4); 88 memcpy(model->mb_types_stats[ctx], 89 vp56_pre_def_mb_type_stats[idx][ctx], 90 sizeof(model->mb_types_stats[ctx])); 91 } 92 if (vp56_rac_get_prob(c, 254)) { 93 for (type=0; type<10; type++) { 94 for(i=0; i<2; i++) { 95 if (vp56_rac_get_prob(c, 205)) { 96 int delta, sign = vp56_rac_get(c); 97 98 delta = vp56_rac_get_tree(c, vp56_pmbtm_tree, 99 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 150static 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(c, mb_type_model[0])) 157 return prev_type; 158 else 159 return vp56_rac_get_tree(c, vp56_pmbt_tree, mb_type_model); 160} 161 162static 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 == 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 207static 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 264static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame) 265{ 266 int idx = s->scantable.permutated[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[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 == 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[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[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 305static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv, 306 int stride, int dx, int dy) 307{ 308 int t = 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 313static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src, 314 int stride, int x, int y) 315{ 316 uint8_t *dst=s->framep[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->framep[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->dsp.emulated_edge_mc(s->edge_emu_buffer, 343 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 344 stride, 12, 12, x, y, 345 s->plane_width[plane], 346 s->plane_height[plane]); 347 src_block = s->edge_emu_buffer; 348 src_offset = 2 + 2*stride; 349 } else if (deblock_filtering) { 350 /* only need a 12x12 block, but there is no such dsp function, */ 351 /* so copy a 16x12 block */ 352 s->dsp.put_pixels_tab[0][0](s->edge_emu_buffer, 353 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 354 stride, 12); 355 src_block = s->edge_emu_buffer; 356 src_offset = 2 + 2*stride; 357 } else { 358 src_block = src; 359 src_offset = s->block_offset[b] + dy*stride + dx; 360 } 361 362 if (deblock_filtering) 363 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7); 364 365 if (s->mv[b].x & mask) 366 overlap_offset += (s->mv[b].x > 0) ? 1 : -1; 367 if (s->mv[b].y & mask) 368 overlap_offset += (s->mv[b].y > 0) ? stride : -stride; 369 370 if (overlap_offset) { 371 if (s->filter) 372 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset, 373 stride, s->mv[b], mask, s->filter_selection, b<4); 374 else 375 s->dsp.put_no_rnd_pixels_l2[1](dst, src_block+src_offset, 376 src_block+src_offset+overlap_offset, 377 stride, 8); 378 } else { 379 s->dsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8); 380 } 381} 382 383static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha) 384{ 385 AVFrame *frame_current, *frame_ref; 386 VP56mb mb_type; 387 VP56Frame ref_frame; 388 int b, ab, b_max, plane, off; 389 390 if (s->framep[VP56_FRAME_CURRENT]->key_frame) 391 mb_type = VP56_MB_INTRA; 392 else 393 mb_type = vp56_decode_mv(s, row, col); 394 ref_frame = vp56_reference_frame[mb_type]; 395 396 s->dsp.clear_blocks(*s->block_coeff); 397 398 s->parse_coeff(s); 399 400 vp56_add_predictors_dc(s, ref_frame); 401 402 frame_current = s->framep[VP56_FRAME_CURRENT]; 403 frame_ref = s->framep[ref_frame]; 404 if (mb_type != VP56_MB_INTRA && !frame_ref->data[0]) 405 return; 406 407 ab = 6*is_alpha; 408 b_max = 6 - 2*is_alpha; 409 410 switch (mb_type) { 411 case VP56_MB_INTRA: 412 for (b=0; b<b_max; b++) { 413 plane = vp56_b2p[b+ab]; 414 s->dsp.idct_put(frame_current->data[plane] + s->block_offset[b], 415 s->stride[plane], s->block_coeff[b]); 416 } 417 break; 418 419 case VP56_MB_INTER_NOVEC_PF: 420 case VP56_MB_INTER_NOVEC_GF: 421 for (b=0; b<b_max; b++) { 422 plane = vp56_b2p[b+ab]; 423 off = s->block_offset[b]; 424 s->dsp.put_pixels_tab[1][0](frame_current->data[plane] + off, 425 frame_ref->data[plane] + off, 426 s->stride[plane], 8); 427 s->dsp.idct_add(frame_current->data[plane] + off, 428 s->stride[plane], s->block_coeff[b]); 429 } 430 break; 431 432 case VP56_MB_INTER_DELTA_PF: 433 case VP56_MB_INTER_V1_PF: 434 case VP56_MB_INTER_V2_PF: 435 case VP56_MB_INTER_DELTA_GF: 436 case VP56_MB_INTER_4V: 437 case VP56_MB_INTER_V1_GF: 438 case VP56_MB_INTER_V2_GF: 439 for (b=0; b<b_max; b++) { 440 int x_off = b==1 || b==3 ? 8 : 0; 441 int y_off = b==2 || b==3 ? 8 : 0; 442 plane = vp56_b2p[b+ab]; 443 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane], 444 16*col+x_off, 16*row+y_off); 445 s->dsp.idct_add(frame_current->data[plane] + s->block_offset[b], 446 s->stride[plane], s->block_coeff[b]); 447 } 448 break; 449 } 450} 451 452static int vp56_size_changed(AVCodecContext *avctx) 453{ 454 VP56Context *s = avctx->priv_data; 455 int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0]; 456 int i; 457 458 s->plane_width[0] = s->plane_width[3] = avctx->coded_width; 459 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2; 460 s->plane_height[0] = s->plane_height[3] = avctx->coded_height; 461 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2; 462 463 for (i=0; i<4; i++) 464 s->stride[i] = s->flip * s->framep[VP56_FRAME_CURRENT]->linesize[i]; 465 466 s->mb_width = (avctx->coded_width +15) / 16; 467 s->mb_height = (avctx->coded_height+15) / 16; 468 469 if (s->mb_width > 1000 || s->mb_height > 1000) { 470 avcodec_set_dimensions(avctx, 0, 0); 471 av_log(avctx, AV_LOG_ERROR, "picture too big\n"); 472 return -1; 473 } 474 475 s->qscale_table = av_realloc(s->qscale_table, s->mb_width); 476 s->above_blocks = av_realloc(s->above_blocks, 477 (4*s->mb_width+6) * sizeof(*s->above_blocks)); 478 s->macroblocks = av_realloc(s->macroblocks, 479 s->mb_width*s->mb_height*sizeof(*s->macroblocks)); 480 av_free(s->edge_emu_buffer_alloc); 481 s->edge_emu_buffer_alloc = av_malloc(16*stride); 482 s->edge_emu_buffer = s->edge_emu_buffer_alloc; 483 if (s->flip < 0) 484 s->edge_emu_buffer += 15 * stride; 485 486 return 0; 487} 488 489int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size, 490 AVPacket *avpkt) 491{ 492 const uint8_t *buf = avpkt->data; 493 VP56Context *s = avctx->priv_data; 494 AVFrame *const p = s->framep[VP56_FRAME_CURRENT]; 495 int remaining_buf_size = avpkt->size; 496 int is_alpha, av_uninit(alpha_offset); 497 498 if (s->has_alpha) { 499 if (remaining_buf_size < 3) 500 return -1; 501 alpha_offset = bytestream_get_be24(&buf); 502 remaining_buf_size -= 3; 503 if (remaining_buf_size < alpha_offset) 504 return -1; 505 } 506 507 for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) { 508 int mb_row, mb_col, mb_row_flip, mb_offset = 0; 509 int block, y, uv, stride_y, stride_uv; 510 int golden_frame = 0; 511 int res; 512 513 s->modelp = &s->models[is_alpha]; 514 515 res = s->parse_header(s, buf, remaining_buf_size, &golden_frame); 516 if (res < 0) { 517 int i; 518 for (i = 0; i < 4; i++) { 519 if (s->frames[i].data[0]) 520 avctx->release_buffer(avctx, &s->frames[i]); 521 } 522 return res; 523 } 524 525 if (res == VP56_SIZE_CHANGE) { 526 int i; 527 for (i = 0; i < 4; i++) { 528 if (s->frames[i].data[0]) 529 avctx->release_buffer(avctx, &s->frames[i]); 530 } 531 if (is_alpha) { 532 avcodec_set_dimensions(avctx, 0, 0); 533 return -1; 534 } 535 } 536 537 if (!is_alpha) { 538 p->reference = 1; 539 if (avctx->get_buffer(avctx, p) < 0) { 540 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 541 return -1; 542 } 543 544 if (res == VP56_SIZE_CHANGE) 545 if (vp56_size_changed(avctx)) { 546 avctx->release_buffer(avctx, p); 547 return -1; 548 } 549 } 550 551 if (p->key_frame) { 552 p->pict_type = AV_PICTURE_TYPE_I; 553 s->default_models_init(s); 554 for (block=0; block<s->mb_height*s->mb_width; block++) 555 s->macroblocks[block].type = VP56_MB_INTRA; 556 } else { 557 p->pict_type = AV_PICTURE_TYPE_P; 558 vp56_parse_mb_type_models(s); 559 s->parse_vector_models(s); 560 s->mb_type = VP56_MB_INTER_NOVEC_PF; 561 } 562 563 if (s->parse_coeff_models(s)) 564 goto next; 565 566 memset(s->prev_dc, 0, sizeof(s->prev_dc)); 567 s->prev_dc[1][VP56_FRAME_CURRENT] = 128; 568 s->prev_dc[2][VP56_FRAME_CURRENT] = 128; 569 570 for (block=0; block < 4*s->mb_width+6; block++) { 571 s->above_blocks[block].ref_frame = VP56_FRAME_NONE; 572 s->above_blocks[block].dc_coeff = 0; 573 s->above_blocks[block].not_null_dc = 0; 574 } 575 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT; 576 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT; 577 578 stride_y = p->linesize[0]; 579 stride_uv = p->linesize[1]; 580 581 if (s->flip < 0) 582 mb_offset = 7; 583 584 /* main macroblocks loop */ 585 for (mb_row=0; mb_row<s->mb_height; mb_row++) { 586 if (s->flip < 0) 587 mb_row_flip = s->mb_height - mb_row - 1; 588 else 589 mb_row_flip = mb_row; 590 591 for (block=0; block<4; block++) { 592 s->left_block[block].ref_frame = VP56_FRAME_NONE; 593 s->left_block[block].dc_coeff = 0; 594 s->left_block[block].not_null_dc = 0; 595 } 596 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx)); 597 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last)); 598 599 s->above_block_idx[0] = 1; 600 s->above_block_idx[1] = 2; 601 s->above_block_idx[2] = 1; 602 s->above_block_idx[3] = 2; 603 s->above_block_idx[4] = 2*s->mb_width + 2 + 1; 604 s->above_block_idx[5] = 3*s->mb_width + 4 + 1; 605 606 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y; 607 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y; 608 s->block_offset[1] = s->block_offset[0] + 8; 609 s->block_offset[3] = s->block_offset[2] + 8; 610 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv; 611 s->block_offset[5] = s->block_offset[4]; 612 613 for (mb_col=0; mb_col<s->mb_width; mb_col++) { 614 vp56_decode_mb(s, mb_row, mb_col, is_alpha); 615 616 for (y=0; y<4; y++) { 617 s->above_block_idx[y] += 2; 618 s->block_offset[y] += 16; 619 } 620 621 for (uv=4; uv<6; uv++) { 622 s->above_block_idx[uv] += 1; 623 s->block_offset[uv] += 8; 624 } 625 } 626 } 627 628 next: 629 if (p->key_frame || golden_frame) { 630 if (s->framep[VP56_FRAME_GOLDEN]->data[0] && 631 s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2]) 632 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]); 633 s->framep[VP56_FRAME_GOLDEN] = p; 634 } 635 636 if (s->has_alpha) { 637 FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN], 638 s->framep[VP56_FRAME_GOLDEN2]); 639 buf += alpha_offset; 640 remaining_buf_size -= alpha_offset; 641 } 642 } 643 644 if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN] || 645 s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN2]) { 646 if (s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN] && 647 s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN2]) 648 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS], 649 s->framep[VP56_FRAME_UNUSED]); 650 else 651 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS], 652 s->framep[VP56_FRAME_UNUSED2]); 653 } else if (s->framep[VP56_FRAME_PREVIOUS]->data[0]) 654 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]); 655 FFSWAP(AVFrame *, s->framep[VP56_FRAME_CURRENT], 656 s->framep[VP56_FRAME_PREVIOUS]); 657 658 p->qstride = 0; 659 p->qscale_table = s->qscale_table; 660 p->qscale_type = FF_QSCALE_TYPE_VP56; 661 *(AVFrame*)data = *p; 662 *data_size = sizeof(AVFrame); 663 664 return avpkt->size; 665} 666 667av_cold void ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha) 668{ 669 VP56Context *s = avctx->priv_data; 670 int i; 671 672 s->avctx = avctx; 673 avctx->pix_fmt = has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P; 674 675 if (avctx->idct_algo == FF_IDCT_AUTO) 676 avctx->idct_algo = FF_IDCT_VP3; 677 dsputil_init(&s->dsp, avctx); 678 ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id); 679 ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct); 680 681 for (i=0; i<4; i++) 682 s->framep[i] = &s->frames[i]; 683 s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN]; 684 s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2]; 685 s->edge_emu_buffer_alloc = NULL; 686 687 s->above_blocks = NULL; 688 s->macroblocks = NULL; 689 s->quantizer = -1; 690 s->deblock_filtering = 1; 691 692 s->filter = NULL; 693 694 s->has_alpha = has_alpha; 695 if (flip) { 696 s->flip = -1; 697 s->frbi = 2; 698 s->srbi = 0; 699 } else { 700 s->flip = 1; 701 s->frbi = 0; 702 s->srbi = 2; 703 } 704} 705 706av_cold int ff_vp56_free(AVCodecContext *avctx) 707{ 708 VP56Context *s = avctx->priv_data; 709 710 av_freep(&s->qscale_table); 711 av_freep(&s->above_blocks); 712 av_freep(&s->macroblocks); 713 av_freep(&s->edge_emu_buffer_alloc); 714 if (s->framep[VP56_FRAME_GOLDEN]->data[0]) 715 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]); 716 if (s->framep[VP56_FRAME_GOLDEN2]->data[0]) 717 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN2]); 718 if (s->framep[VP56_FRAME_PREVIOUS]->data[0]) 719 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]); 720 return 0; 721} 722