1/** 2 * @file 3 * VP5 and VP6 compatible video decoder (common features) 4 * 5 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> 6 * 7 * This file is part of FFmpeg. 8 * 9 * FFmpeg is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2.1 of the License, or (at your option) any later version. 13 * 14 * FFmpeg is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with FFmpeg; if not, write to the Free Software 21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24#include "avcodec.h" 25#include "bytestream.h" 26 27#include "vp56.h" 28#include "vp56data.h" 29 30 31void vp56_init_dequant(VP56Context *s, int quantizer) 32{ 33 s->quantizer = quantizer; 34 s->dequant_dc = vp56_dc_dequant[quantizer] << 2; 35 s->dequant_ac = vp56_ac_dequant[quantizer] << 2; 36 memset(s->qscale_table, quantizer, s->mb_width); 37} 38 39static int vp56_get_vectors_predictors(VP56Context *s, int row, int col, 40 VP56Frame ref_frame) 41{ 42 int nb_pred = 0; 43 VP56mv vect[2] = {{0,0}, {0,0}}; 44 int pos, offset; 45 VP56mv mvp; 46 47 for (pos=0; pos<12; pos++) { 48 mvp.x = col + vp56_candidate_predictor_pos[pos][0]; 49 mvp.y = row + vp56_candidate_predictor_pos[pos][1]; 50 if (mvp.x < 0 || mvp.x >= s->mb_width || 51 mvp.y < 0 || mvp.y >= s->mb_height) 52 continue; 53 offset = mvp.x + s->mb_width*mvp.y; 54 55 if (vp56_reference_frame[s->macroblocks[offset].type] != ref_frame) 56 continue; 57 if ((s->macroblocks[offset].mv.x == vect[0].x && 58 s->macroblocks[offset].mv.y == vect[0].y) || 59 (s->macroblocks[offset].mv.x == 0 && 60 s->macroblocks[offset].mv.y == 0)) 61 continue; 62 63 vect[nb_pred++] = s->macroblocks[offset].mv; 64 if (nb_pred > 1) { 65 nb_pred = -1; 66 break; 67 } 68 s->vector_candidate_pos = pos; 69 } 70 71 s->vector_candidate[0] = vect[0]; 72 s->vector_candidate[1] = vect[1]; 73 74 return nb_pred+1; 75} 76 77static void vp56_parse_mb_type_models(VP56Context *s) 78{ 79 VP56RangeCoder *c = &s->c; 80 VP56Model *model = s->modelp; 81 int i, ctx, type; 82 83 for (ctx=0; ctx<3; ctx++) { 84 if (vp56_rac_get_prob(c, 174)) { 85 int idx = vp56_rac_gets(c, 4); 86 memcpy(model->mb_types_stats[ctx], 87 vp56_pre_def_mb_type_stats[idx][ctx], 88 sizeof(model->mb_types_stats[ctx])); 89 } 90 if (vp56_rac_get_prob(c, 254)) { 91 for (type=0; type<10; type++) { 92 for(i=0; i<2; i++) { 93 if (vp56_rac_get_prob(c, 205)) { 94 int delta, sign = vp56_rac_get(c); 95 96 delta = vp56_rac_get_tree(c, vp56_pmbtm_tree, 97 vp56_mb_type_model_model); 98 if (!delta) 99 delta = 4 * vp56_rac_gets(c, 7); 100 model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign; 101 } 102 } 103 } 104 } 105 } 106 107 /* compute MB type probability tables based on previous MB type */ 108 for (ctx=0; ctx<3; ctx++) { 109 int p[10]; 110 111 for (type=0; type<10; type++) 112 p[type] = 100 * model->mb_types_stats[ctx][type][1]; 113 114 for (type=0; type<10; type++) { 115 int p02, p34, p0234, p17, p56, p89, p5689, p156789; 116 117 /* conservative MB type probability */ 118 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]); 119 120 p[type] = 0; /* same MB type => weight is null */ 121 122 /* binary tree parsing probabilities */ 123 p02 = p[0] + p[2]; 124 p34 = p[3] + p[4]; 125 p0234 = p02 + p34; 126 p17 = p[1] + p[7]; 127 p56 = p[5] + p[6]; 128 p89 = p[8] + p[9]; 129 p5689 = p56 + p89; 130 p156789 = p17 + p5689; 131 132 model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789); 133 model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234); 134 model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789); 135 model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02); 136 model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34); 137 model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17); 138 model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689); 139 model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56); 140 model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89); 141 142 /* restore initial value */ 143 p[type] = 100 * model->mb_types_stats[ctx][type][1]; 144 } 145 } 146} 147 148static VP56mb vp56_parse_mb_type(VP56Context *s, 149 VP56mb prev_type, int ctx) 150{ 151 uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type]; 152 VP56RangeCoder *c = &s->c; 153 154 if (vp56_rac_get_prob(c, mb_type_model[0])) 155 return prev_type; 156 else 157 return vp56_rac_get_tree(c, vp56_pmbt_tree, mb_type_model); 158} 159 160static void vp56_decode_4mv(VP56Context *s, int row, int col) 161{ 162 VP56mv mv = {0,0}; 163 int type[4]; 164 int b; 165 166 /* parse each block type */ 167 for (b=0; b<4; b++) { 168 type[b] = vp56_rac_gets(&s->c, 2); 169 if (type[b]) 170 type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */ 171 } 172 173 /* get vectors */ 174 for (b=0; b<4; b++) { 175 switch (type[b]) { 176 case VP56_MB_INTER_NOVEC_PF: 177 s->mv[b] = (VP56mv) {0,0}; 178 break; 179 case VP56_MB_INTER_DELTA_PF: 180 s->parse_vector_adjustment(s, &s->mv[b]); 181 break; 182 case VP56_MB_INTER_V1_PF: 183 s->mv[b] = s->vector_candidate[0]; 184 break; 185 case VP56_MB_INTER_V2_PF: 186 s->mv[b] = s->vector_candidate[1]; 187 break; 188 } 189 mv.x += s->mv[b].x; 190 mv.y += s->mv[b].y; 191 } 192 193 /* this is the one selected for the whole MB for prediction */ 194 s->macroblocks[row * s->mb_width + col].mv = s->mv[3]; 195 196 /* chroma vectors are average luma vectors */ 197 if (s->avctx->codec->id == CODEC_ID_VP5) { 198 s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2); 199 s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2); 200 } else { 201 s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4}; 202 } 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 void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame) 263{ 264 int idx = s->scantable.permutated[0]; 265 int b; 266 267 for (b=0; b<6; b++) { 268 VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]]; 269 VP56RefDc *lb = &s->left_block[vp56_b6to4[b]]; 270 int count = 0; 271 int dc = 0; 272 int i; 273 274 if (ref_frame == lb->ref_frame) { 275 dc += lb->dc_coeff; 276 count++; 277 } 278 if (ref_frame == ab->ref_frame) { 279 dc += ab->dc_coeff; 280 count++; 281 } 282 if (s->avctx->codec->id == CODEC_ID_VP5) 283 for (i=0; i<2; i++) 284 if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) { 285 dc += ab[-1+2*i].dc_coeff; 286 count++; 287 } 288 if (count == 0) 289 dc = s->prev_dc[vp56_b2p[b]][ref_frame]; 290 else if (count == 2) 291 dc /= 2; 292 293 s->block_coeff[b][idx] += dc; 294 s->prev_dc[vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx]; 295 ab->dc_coeff = s->block_coeff[b][idx]; 296 ab->ref_frame = ref_frame; 297 lb->dc_coeff = s->block_coeff[b][idx]; 298 lb->ref_frame = ref_frame; 299 s->block_coeff[b][idx] *= s->dequant_dc; 300 } 301} 302 303static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv, 304 int stride, int dx, int dy) 305{ 306 int t = vp56_filter_threshold[s->quantizer]; 307 if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t); 308 if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t); 309} 310 311static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src, 312 int stride, int x, int y) 313{ 314 uint8_t *dst=s->framep[VP56_FRAME_CURRENT]->data[plane]+s->block_offset[b]; 315 uint8_t *src_block; 316 int src_offset; 317 int overlap_offset = 0; 318 int mask = s->vp56_coord_div[b] - 1; 319 int deblock_filtering = s->deblock_filtering; 320 int dx; 321 int dy; 322 323 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL || 324 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY 325 && !s->framep[VP56_FRAME_CURRENT]->key_frame)) 326 deblock_filtering = 0; 327 328 dx = s->mv[b].x / s->vp56_coord_div[b]; 329 dy = s->mv[b].y / s->vp56_coord_div[b]; 330 331 if (b >= 4) { 332 x /= 2; 333 y /= 2; 334 } 335 x += dx - 2; 336 y += dy - 2; 337 338 if (x<0 || x+12>=s->plane_width[plane] || 339 y<0 || y+12>=s->plane_height[plane]) { 340 ff_emulated_edge_mc(s->edge_emu_buffer, 341 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 342 stride, 12, 12, x, y, 343 s->plane_width[plane], 344 s->plane_height[plane]); 345 src_block = s->edge_emu_buffer; 346 src_offset = 2 + 2*stride; 347 } else if (deblock_filtering) { 348 /* only need a 12x12 block, but there is no such dsp function, */ 349 /* so copy a 16x12 block */ 350 s->dsp.put_pixels_tab[0][0](s->edge_emu_buffer, 351 src + s->block_offset[b] + (dy-2)*stride + (dx-2), 352 stride, 12); 353 src_block = s->edge_emu_buffer; 354 src_offset = 2 + 2*stride; 355 } else { 356 src_block = src; 357 src_offset = s->block_offset[b] + dy*stride + dx; 358 } 359 360 if (deblock_filtering) 361 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7); 362 363 if (s->mv[b].x & mask) 364 overlap_offset += (s->mv[b].x > 0) ? 1 : -1; 365 if (s->mv[b].y & mask) 366 overlap_offset += (s->mv[b].y > 0) ? stride : -stride; 367 368 if (overlap_offset) { 369 if (s->filter) 370 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset, 371 stride, s->mv[b], mask, s->filter_selection, b<4); 372 else 373 s->dsp.put_no_rnd_pixels_l2[1](dst, src_block+src_offset, 374 src_block+src_offset+overlap_offset, 375 stride, 8); 376 } else { 377 s->dsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8); 378 } 379} 380 381static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha) 382{ 383 AVFrame *frame_current, *frame_ref; 384 VP56mb mb_type; 385 VP56Frame ref_frame; 386 int b, ab, b_max, plane, off; 387 388 if (s->framep[VP56_FRAME_CURRENT]->key_frame) 389 mb_type = VP56_MB_INTRA; 390 else 391 mb_type = vp56_decode_mv(s, row, col); 392 ref_frame = vp56_reference_frame[mb_type]; 393 394 s->dsp.clear_blocks(*s->block_coeff); 395 396 s->parse_coeff(s); 397 398 vp56_add_predictors_dc(s, ref_frame); 399 400 frame_current = s->framep[VP56_FRAME_CURRENT]; 401 frame_ref = s->framep[ref_frame]; 402 403 ab = 6*is_alpha; 404 b_max = 6 - 2*is_alpha; 405 406 switch (mb_type) { 407 case VP56_MB_INTRA: 408 for (b=0; b<b_max; b++) { 409 plane = vp56_b2p[b+ab]; 410 s->dsp.idct_put(frame_current->data[plane] + s->block_offset[b], 411 s->stride[plane], s->block_coeff[b]); 412 } 413 break; 414 415 case VP56_MB_INTER_NOVEC_PF: 416 case VP56_MB_INTER_NOVEC_GF: 417 for (b=0; b<b_max; b++) { 418 plane = vp56_b2p[b+ab]; 419 off = s->block_offset[b]; 420 s->dsp.put_pixels_tab[1][0](frame_current->data[plane] + off, 421 frame_ref->data[plane] + off, 422 s->stride[plane], 8); 423 s->dsp.idct_add(frame_current->data[plane] + off, 424 s->stride[plane], s->block_coeff[b]); 425 } 426 break; 427 428 case VP56_MB_INTER_DELTA_PF: 429 case VP56_MB_INTER_V1_PF: 430 case VP56_MB_INTER_V2_PF: 431 case VP56_MB_INTER_DELTA_GF: 432 case VP56_MB_INTER_4V: 433 case VP56_MB_INTER_V1_GF: 434 case VP56_MB_INTER_V2_GF: 435 for (b=0; b<b_max; b++) { 436 int x_off = b==1 || b==3 ? 8 : 0; 437 int y_off = b==2 || b==3 ? 8 : 0; 438 plane = vp56_b2p[b+ab]; 439 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane], 440 16*col+x_off, 16*row+y_off); 441 s->dsp.idct_add(frame_current->data[plane] + s->block_offset[b], 442 s->stride[plane], s->block_coeff[b]); 443 } 444 break; 445 } 446} 447 448static int vp56_size_changed(AVCodecContext *avctx) 449{ 450 VP56Context *s = avctx->priv_data; 451 int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0]; 452 int i; 453 454 s->plane_width[0] = s->plane_width[3] = avctx->coded_width; 455 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2; 456 s->plane_height[0] = s->plane_height[3] = avctx->coded_height; 457 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2; 458 459 for (i=0; i<4; i++) 460 s->stride[i] = s->flip * s->framep[VP56_FRAME_CURRENT]->linesize[i]; 461 462 s->mb_width = (avctx->coded_width +15) / 16; 463 s->mb_height = (avctx->coded_height+15) / 16; 464 465 if (s->mb_width > 1000 || s->mb_height > 1000) { 466 av_log(avctx, AV_LOG_ERROR, "picture too big\n"); 467 return -1; 468 } 469 470 s->qscale_table = av_realloc(s->qscale_table, s->mb_width); 471 s->above_blocks = av_realloc(s->above_blocks, 472 (4*s->mb_width+6) * sizeof(*s->above_blocks)); 473 s->macroblocks = av_realloc(s->macroblocks, 474 s->mb_width*s->mb_height*sizeof(*s->macroblocks)); 475 av_free(s->edge_emu_buffer_alloc); 476 s->edge_emu_buffer_alloc = av_malloc(16*stride); 477 s->edge_emu_buffer = s->edge_emu_buffer_alloc; 478 if (s->flip < 0) 479 s->edge_emu_buffer += 15 * stride; 480 481 return 0; 482} 483 484int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size, 485 AVPacket *avpkt) 486{ 487 const uint8_t *buf = avpkt->data; 488 VP56Context *s = avctx->priv_data; 489 AVFrame *const p = s->framep[VP56_FRAME_CURRENT]; 490 int remaining_buf_size = avpkt->size; 491 int is_alpha, av_uninit(alpha_offset); 492 493 if (s->has_alpha) { 494 if (remaining_buf_size < 3) 495 return -1; 496 alpha_offset = bytestream_get_be24(&buf); 497 remaining_buf_size -= 3; 498 if (remaining_buf_size < alpha_offset) 499 return -1; 500 } 501 502 for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) { 503 int mb_row, mb_col, mb_row_flip, mb_offset = 0; 504 int block, y, uv, stride_y, stride_uv; 505 int golden_frame = 0; 506 int res; 507 508 s->modelp = &s->models[is_alpha]; 509 510 res = s->parse_header(s, buf, remaining_buf_size, &golden_frame); 511 if (!res) 512 return -1; 513 514 if (!is_alpha) { 515 p->reference = 1; 516 if (avctx->get_buffer(avctx, p) < 0) { 517 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n"); 518 return -1; 519 } 520 521 if (res == 2) 522 if (vp56_size_changed(avctx)) { 523 avctx->release_buffer(avctx, p); 524 return -1; 525 } 526 } 527 528 if (p->key_frame) { 529 p->pict_type = FF_I_TYPE; 530 s->default_models_init(s); 531 for (block=0; block<s->mb_height*s->mb_width; block++) 532 s->macroblocks[block].type = VP56_MB_INTRA; 533 } else { 534 p->pict_type = FF_P_TYPE; 535 vp56_parse_mb_type_models(s); 536 s->parse_vector_models(s); 537 s->mb_type = VP56_MB_INTER_NOVEC_PF; 538 } 539 540 s->parse_coeff_models(s); 541 542 memset(s->prev_dc, 0, sizeof(s->prev_dc)); 543 s->prev_dc[1][VP56_FRAME_CURRENT] = 128; 544 s->prev_dc[2][VP56_FRAME_CURRENT] = 128; 545 546 for (block=0; block < 4*s->mb_width+6; block++) { 547 s->above_blocks[block].ref_frame = VP56_FRAME_NONE; 548 s->above_blocks[block].dc_coeff = 0; 549 s->above_blocks[block].not_null_dc = 0; 550 } 551 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT; 552 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT; 553 554 stride_y = p->linesize[0]; 555 stride_uv = p->linesize[1]; 556 557 if (s->flip < 0) 558 mb_offset = 7; 559 560 /* main macroblocks loop */ 561 for (mb_row=0; mb_row<s->mb_height; mb_row++) { 562 if (s->flip < 0) 563 mb_row_flip = s->mb_height - mb_row - 1; 564 else 565 mb_row_flip = mb_row; 566 567 for (block=0; block<4; block++) { 568 s->left_block[block].ref_frame = VP56_FRAME_NONE; 569 s->left_block[block].dc_coeff = 0; 570 s->left_block[block].not_null_dc = 0; 571 } 572 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx)); 573 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last)); 574 575 s->above_block_idx[0] = 1; 576 s->above_block_idx[1] = 2; 577 s->above_block_idx[2] = 1; 578 s->above_block_idx[3] = 2; 579 s->above_block_idx[4] = 2*s->mb_width + 2 + 1; 580 s->above_block_idx[5] = 3*s->mb_width + 4 + 1; 581 582 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y; 583 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y; 584 s->block_offset[1] = s->block_offset[0] + 8; 585 s->block_offset[3] = s->block_offset[2] + 8; 586 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv; 587 s->block_offset[5] = s->block_offset[4]; 588 589 for (mb_col=0; mb_col<s->mb_width; mb_col++) { 590 vp56_decode_mb(s, mb_row, mb_col, is_alpha); 591 592 for (y=0; y<4; y++) { 593 s->above_block_idx[y] += 2; 594 s->block_offset[y] += 16; 595 } 596 597 for (uv=4; uv<6; uv++) { 598 s->above_block_idx[uv] += 1; 599 s->block_offset[uv] += 8; 600 } 601 } 602 } 603 604 if (p->key_frame || golden_frame) { 605 if (s->framep[VP56_FRAME_GOLDEN]->data[0] && 606 s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2]) 607 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]); 608 s->framep[VP56_FRAME_GOLDEN] = p; 609 } 610 611 if (s->has_alpha) { 612 FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN], 613 s->framep[VP56_FRAME_GOLDEN2]); 614 buf += alpha_offset; 615 remaining_buf_size -= alpha_offset; 616 } 617 } 618 619 if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN] || 620 s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN2]) { 621 if (s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN] && 622 s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN2]) 623 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS], 624 s->framep[VP56_FRAME_UNUSED]); 625 else 626 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS], 627 s->framep[VP56_FRAME_UNUSED2]); 628 } else if (s->framep[VP56_FRAME_PREVIOUS]->data[0]) 629 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]); 630 FFSWAP(AVFrame *, s->framep[VP56_FRAME_CURRENT], 631 s->framep[VP56_FRAME_PREVIOUS]); 632 633 p->qstride = 0; 634 p->qscale_table = s->qscale_table; 635 p->qscale_type = FF_QSCALE_TYPE_VP56; 636 *(AVFrame*)data = *p; 637 *data_size = sizeof(AVFrame); 638 639 return avpkt->size; 640} 641 642av_cold void vp56_init(AVCodecContext *avctx, int flip, int has_alpha) 643{ 644 VP56Context *s = avctx->priv_data; 645 int i; 646 647 s->avctx = avctx; 648 avctx->pix_fmt = has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P; 649 650 if (avctx->idct_algo == FF_IDCT_AUTO) 651 avctx->idct_algo = FF_IDCT_VP3; 652 dsputil_init(&s->dsp, avctx); 653 ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id); 654 ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct); 655 656 for (i=0; i<4; i++) 657 s->framep[i] = &s->frames[i]; 658 s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN]; 659 s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2]; 660 s->edge_emu_buffer_alloc = NULL; 661 662 s->above_blocks = NULL; 663 s->macroblocks = NULL; 664 s->quantizer = -1; 665 s->deblock_filtering = 1; 666 667 s->filter = NULL; 668 669 s->has_alpha = has_alpha; 670 if (flip) { 671 s->flip = -1; 672 s->frbi = 2; 673 s->srbi = 0; 674 } else { 675 s->flip = 1; 676 s->frbi = 0; 677 s->srbi = 2; 678 } 679} 680 681av_cold int vp56_free(AVCodecContext *avctx) 682{ 683 VP56Context *s = avctx->priv_data; 684 685 av_freep(&s->qscale_table); 686 av_freep(&s->above_blocks); 687 av_freep(&s->macroblocks); 688 av_freep(&s->edge_emu_buffer_alloc); 689 if (s->framep[VP56_FRAME_GOLDEN]->data[0]) 690 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]); 691 if (s->framep[VP56_FRAME_GOLDEN2]->data[0]) 692 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN2]); 693 if (s->framep[VP56_FRAME_PREVIOUS]->data[0]) 694 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]); 695 return 0; 696} 697