1/* 2 * HEVC video decoder 3 * 4 * Copyright (C) 2012 - 2013 Guillaume Martres 5 * Copyright (C) 2012 - 2013 Gildas Cocherel 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 "libavutil/avassert.h" 25 26#include "thread.h" 27#include "hevc.h" 28#include "hevcdec.h" 29#include "threadframe.h" 30 31void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags) 32{ 33 /* frame->frame can be NULL if context init failed */ 34 if (!frame->frame || !frame->frame->buf[0]) 35 return; 36 37 frame->flags &= ~flags; 38 if (!frame->flags) { 39 ff_thread_release_ext_buffer(s->avctx, &frame->tf); 40 ff_thread_release_buffer(s->avctx, frame->frame_grain); 41 frame->needs_fg = 0; 42 43 av_buffer_unref(&frame->tab_mvf_buf); 44 frame->tab_mvf = NULL; 45 46 av_buffer_unref(&frame->rpl_buf); 47 av_buffer_unref(&frame->rpl_tab_buf); 48 frame->rpl_tab = NULL; 49 frame->refPicList = NULL; 50 51 frame->collocated_ref = NULL; 52 53 av_buffer_unref(&frame->hwaccel_priv_buf); 54 frame->hwaccel_picture_private = NULL; 55 } 56} 57 58const RefPicList *ff_hevc_get_ref_list(const HEVCContext *s, 59 const HEVCFrame *ref, int x0, int y0) 60{ 61 int x_cb = x0 >> s->ps.sps->log2_ctb_size; 62 int y_cb = y0 >> s->ps.sps->log2_ctb_size; 63 int pic_width_cb = s->ps.sps->ctb_width; 64 int ctb_addr_ts = s->ps.pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb]; 65 return &ref->rpl_tab[ctb_addr_ts]->refPicList[0]; 66} 67 68void ff_hevc_clear_refs(HEVCContext *s) 69{ 70 int i; 71 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) 72 ff_hevc_unref_frame(s, &s->DPB[i], 73 HEVC_FRAME_FLAG_SHORT_REF | 74 HEVC_FRAME_FLAG_LONG_REF); 75} 76 77void ff_hevc_flush_dpb(HEVCContext *s) 78{ 79 int i; 80 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) 81 ff_hevc_unref_frame(s, &s->DPB[i], ~0); 82} 83 84static HEVCFrame *alloc_frame(HEVCContext *s) 85{ 86 int i, j, ret; 87 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 88 HEVCFrame *frame = &s->DPB[i]; 89 if (frame->frame->buf[0]) 90 continue; 91 92 ret = ff_thread_get_ext_buffer(s->avctx, &frame->tf, 93 AV_GET_BUFFER_FLAG_REF); 94 if (ret < 0) 95 return NULL; 96 97 frame->rpl_buf = av_buffer_allocz(s->pkt.nb_nals * sizeof(RefPicListTab)); 98 if (!frame->rpl_buf) 99 goto fail; 100 101 frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool); 102 if (!frame->tab_mvf_buf) 103 goto fail; 104 frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data; 105 106 frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool); 107 if (!frame->rpl_tab_buf) 108 goto fail; 109 frame->rpl_tab = (RefPicListTab **)frame->rpl_tab_buf->data; 110 frame->ctb_count = s->ps.sps->ctb_width * s->ps.sps->ctb_height; 111 for (j = 0; j < frame->ctb_count; j++) 112 frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data; 113 114 frame->frame->top_field_first = s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD; 115 frame->frame->interlaced_frame = (s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) || (s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD); 116 117 if (s->avctx->hwaccel) { 118 const AVHWAccel *hwaccel = s->avctx->hwaccel; 119 av_assert0(!frame->hwaccel_picture_private); 120 if (hwaccel->frame_priv_data_size) { 121 frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size); 122 if (!frame->hwaccel_priv_buf) 123 goto fail; 124 frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data; 125 } 126 } 127 128 return frame; 129fail: 130 ff_hevc_unref_frame(s, frame, ~0); 131 return NULL; 132 } 133 av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n"); 134 return NULL; 135} 136 137int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc) 138{ 139 HEVCFrame *ref; 140 int i; 141 142 /* check that this POC doesn't already exist */ 143 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 144 HEVCFrame *frame = &s->DPB[i]; 145 146 if (frame->frame->buf[0] && frame->sequence == s->seq_decode && 147 frame->poc == poc) { 148 av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n", 149 poc); 150 return AVERROR_INVALIDDATA; 151 } 152 } 153 154 ref = alloc_frame(s); 155 if (!ref) 156 return AVERROR(ENOMEM); 157 158 *frame = ref->frame; 159 s->ref = ref; 160 161 if (s->sh.pic_output_flag) 162 ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF; 163 else 164 ref->flags = HEVC_FRAME_FLAG_SHORT_REF; 165 166 ref->poc = poc; 167 ref->sequence = s->seq_decode; 168 ref->frame->crop_left = s->ps.sps->output_window.left_offset; 169 ref->frame->crop_right = s->ps.sps->output_window.right_offset; 170 ref->frame->crop_top = s->ps.sps->output_window.top_offset; 171 ref->frame->crop_bottom = s->ps.sps->output_window.bottom_offset; 172 173 return 0; 174} 175 176int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush) 177{ 178 do { 179 int nb_output = 0; 180 int min_poc = INT_MAX; 181 int i, min_idx, ret; 182 183 if (s->sh.no_output_of_prior_pics_flag == 1 && s->no_rasl_output_flag == 1) { 184 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 185 HEVCFrame *frame = &s->DPB[i]; 186 if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc && 187 frame->sequence == s->seq_output) { 188 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT); 189 } 190 } 191 } 192 193 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 194 HEVCFrame *frame = &s->DPB[i]; 195 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) && 196 frame->sequence == s->seq_output) { 197 nb_output++; 198 if (frame->poc < min_poc || nb_output == 1) { 199 min_poc = frame->poc; 200 min_idx = i; 201 } 202 } 203 } 204 205 /* wait for more frames before output */ 206 if (!flush && s->seq_output == s->seq_decode && s->ps.sps && 207 nb_output <= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].num_reorder_pics) 208 return 0; 209 210 if (nb_output) { 211 HEVCFrame *frame = &s->DPB[min_idx]; 212 213 ret = av_frame_ref(out, frame->needs_fg ? frame->frame_grain : frame->frame); 214 if (frame->flags & HEVC_FRAME_FLAG_BUMPING) 215 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_BUMPING); 216 else 217 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT); 218 if (ret < 0) 219 return ret; 220 221 if (frame->needs_fg && (ret = av_frame_copy_props(out, frame->frame)) < 0) 222 return ret; 223 224 if (!(s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN)) 225 av_frame_remove_side_data(out, AV_FRAME_DATA_FILM_GRAIN_PARAMS); 226 227 av_log(s->avctx, AV_LOG_DEBUG, 228 "Output frame with POC %d.\n", frame->poc); 229 return 1; 230 } 231 232 if (s->seq_output != s->seq_decode) 233 s->seq_output = (s->seq_output + 1) & 0xff; 234 else 235 break; 236 } while (1); 237 238 return 0; 239} 240 241void ff_hevc_bump_frame(HEVCContext *s) 242{ 243 int dpb = 0; 244 int min_poc = INT_MAX; 245 int i; 246 247 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 248 HEVCFrame *frame = &s->DPB[i]; 249 if ((frame->flags) && 250 frame->sequence == s->seq_output && 251 frame->poc != s->poc) { 252 dpb++; 253 } 254 } 255 256 if (s->ps.sps && dpb >= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].max_dec_pic_buffering) { 257 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 258 HEVCFrame *frame = &s->DPB[i]; 259 if ((frame->flags) && 260 frame->sequence == s->seq_output && 261 frame->poc != s->poc) { 262 if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) { 263 min_poc = frame->poc; 264 } 265 } 266 } 267 268 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 269 HEVCFrame *frame = &s->DPB[i]; 270 if (frame->flags & HEVC_FRAME_FLAG_OUTPUT && 271 frame->sequence == s->seq_output && 272 frame->poc <= min_poc) { 273 frame->flags |= HEVC_FRAME_FLAG_BUMPING; 274 } 275 } 276 277 dpb--; 278 } 279} 280 281static int init_slice_rpl(HEVCContext *s) 282{ 283 HEVCFrame *frame = s->ref; 284 int ctb_count = frame->ctb_count; 285 int ctb_addr_ts = s->ps.pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr]; 286 int i; 287 288 if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab)) 289 return AVERROR_INVALIDDATA; 290 291 for (i = ctb_addr_ts; i < ctb_count; i++) 292 frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx; 293 294 frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts]; 295 296 return 0; 297} 298 299int ff_hevc_slice_rpl(HEVCContext *s) 300{ 301 SliceHeader *sh = &s->sh; 302 303 uint8_t nb_list = sh->slice_type == HEVC_SLICE_B ? 2 : 1; 304 uint8_t list_idx; 305 int i, j, ret; 306 307 ret = init_slice_rpl(s); 308 if (ret < 0) 309 return ret; 310 311 if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs + 312 s->rps[LT_CURR].nb_refs)) { 313 av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n"); 314 return AVERROR_INVALIDDATA; 315 } 316 317 for (list_idx = 0; list_idx < nb_list; list_idx++) { 318 RefPicList rpl_tmp = { { 0 } }; 319 RefPicList *rpl = &s->ref->refPicList[list_idx]; 320 321 /* The order of the elements is 322 * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and 323 * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */ 324 int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF, 325 list_idx ? ST_CURR_BEF : ST_CURR_AFT, 326 LT_CURR }; 327 328 /* concatenate the candidate lists for the current frame */ 329 while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) { 330 for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) { 331 RefPicList *rps = &s->rps[cand_lists[i]]; 332 for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < HEVC_MAX_REFS; j++) { 333 rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j]; 334 rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j]; 335 rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2; 336 rpl_tmp.nb_refs++; 337 } 338 } 339 } 340 341 /* reorder the references if necessary */ 342 if (sh->rpl_modification_flag[list_idx]) { 343 for (i = 0; i < sh->nb_refs[list_idx]; i++) { 344 int idx = sh->list_entry_lx[list_idx][i]; 345 346 if (idx >= rpl_tmp.nb_refs) { 347 av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n"); 348 return AVERROR_INVALIDDATA; 349 } 350 351 rpl->list[i] = rpl_tmp.list[idx]; 352 rpl->ref[i] = rpl_tmp.ref[idx]; 353 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx]; 354 rpl->nb_refs++; 355 } 356 } else { 357 memcpy(rpl, &rpl_tmp, sizeof(*rpl)); 358 rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]); 359 } 360 361 if (sh->collocated_list == list_idx && 362 sh->collocated_ref_idx < rpl->nb_refs) 363 s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx]; 364 } 365 366 return 0; 367} 368 369static HEVCFrame *find_ref_idx(HEVCContext *s, int poc, uint8_t use_msb) 370{ 371 int mask = use_msb ? ~0 : (1 << s->ps.sps->log2_max_poc_lsb) - 1; 372 int i; 373 374 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 375 HEVCFrame *ref = &s->DPB[i]; 376 if (ref->frame->buf[0] && ref->sequence == s->seq_decode) { 377 if ((ref->poc & mask) == poc) 378 return ref; 379 } 380 } 381 382 if (s->nal_unit_type != HEVC_NAL_CRA_NUT && !IS_BLA(s)) 383 av_log(s->avctx, AV_LOG_ERROR, 384 "Could not find ref with POC %d\n", poc); 385 return NULL; 386} 387 388static void mark_ref(HEVCFrame *frame, int flag) 389{ 390 frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF); 391 frame->flags |= flag; 392} 393 394static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc) 395{ 396 HEVCFrame *frame; 397 int i, y; 398 399 frame = alloc_frame(s); 400 if (!frame) 401 return NULL; 402 403 if (!s->avctx->hwaccel) { 404 if (!s->ps.sps->pixel_shift) { 405 for (i = 0; frame->frame->data[i]; i++) 406 memset(frame->frame->data[i], 1 << (s->ps.sps->bit_depth - 1), 407 frame->frame->linesize[i] * AV_CEIL_RSHIFT(s->ps.sps->height, s->ps.sps->vshift[i])); 408 } else { 409 for (i = 0; frame->frame->data[i]; i++) 410 for (y = 0; y < (s->ps.sps->height >> s->ps.sps->vshift[i]); y++) { 411 uint8_t *dst = frame->frame->data[i] + y * frame->frame->linesize[i]; 412 AV_WN16(dst, 1 << (s->ps.sps->bit_depth - 1)); 413 av_memcpy_backptr(dst + 2, 2, 2*(s->ps.sps->width >> s->ps.sps->hshift[i]) - 2); 414 } 415 } 416 } 417 418 frame->poc = poc; 419 frame->sequence = s->seq_decode; 420 frame->flags = 0; 421 422 if (s->threads_type == FF_THREAD_FRAME) 423 ff_thread_report_progress(&frame->tf, INT_MAX, 0); 424 425 return frame; 426} 427 428/* add a reference with the given poc to the list and mark it as used in DPB */ 429static int add_candidate_ref(HEVCContext *s, RefPicList *list, 430 int poc, int ref_flag, uint8_t use_msb) 431{ 432 HEVCFrame *ref = find_ref_idx(s, poc, use_msb); 433 434 if (ref == s->ref || list->nb_refs >= HEVC_MAX_REFS) 435 return AVERROR_INVALIDDATA; 436 437 if (!ref) { 438 ref = generate_missing_ref(s, poc); 439 if (!ref) 440 return AVERROR(ENOMEM); 441 } 442 443 list->list[list->nb_refs] = ref->poc; 444 list->ref[list->nb_refs] = ref; 445 list->nb_refs++; 446 447 mark_ref(ref, ref_flag); 448 return 0; 449} 450 451int ff_hevc_frame_rps(HEVCContext *s) 452{ 453 const ShortTermRPS *short_rps = s->sh.short_term_rps; 454 const LongTermRPS *long_rps = &s->sh.long_term_rps; 455 RefPicList *rps = s->rps; 456 int i, ret = 0; 457 458 if (!short_rps) { 459 rps[0].nb_refs = rps[1].nb_refs = 0; 460 return 0; 461 } 462 463 /* clear the reference flags on all frames except the current one */ 464 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) { 465 HEVCFrame *frame = &s->DPB[i]; 466 467 if (frame == s->ref) 468 continue; 469 470 mark_ref(frame, 0); 471 } 472 473 for (i = 0; i < NB_RPS_TYPE; i++) 474 rps[i].nb_refs = 0; 475 476 /* add the short refs */ 477 for (i = 0; i < short_rps->num_delta_pocs; i++) { 478 int poc = s->poc + short_rps->delta_poc[i]; 479 int list; 480 481 if (!short_rps->used[i]) 482 list = ST_FOLL; 483 else if (i < short_rps->num_negative_pics) 484 list = ST_CURR_BEF; 485 else 486 list = ST_CURR_AFT; 487 488 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF, 1); 489 if (ret < 0) 490 goto fail; 491 } 492 493 /* add the long refs */ 494 for (i = 0; i < long_rps->nb_refs; i++) { 495 int poc = long_rps->poc[i]; 496 int list = long_rps->used[i] ? LT_CURR : LT_FOLL; 497 498 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF, long_rps->poc_msb_present[i]); 499 if (ret < 0) 500 goto fail; 501 } 502 503fail: 504 /* release any frames that are now unused */ 505 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) 506 ff_hevc_unref_frame(s, &s->DPB[i], 0); 507 508 return ret; 509} 510 511int ff_hevc_frame_nb_refs(const HEVCContext *s) 512{ 513 int ret = 0; 514 int i; 515 const ShortTermRPS *rps = s->sh.short_term_rps; 516 const LongTermRPS *long_rps = &s->sh.long_term_rps; 517 518 if (rps) { 519 for (i = 0; i < rps->num_negative_pics; i++) 520 ret += !!rps->used[i]; 521 for (; i < rps->num_delta_pocs; i++) 522 ret += !!rps->used[i]; 523 } 524 525 if (long_rps) { 526 for (i = 0; i < long_rps->nb_refs; i++) 527 ret += !!long_rps->used[i]; 528 } 529 return ret; 530} 531