4 * Copyright (C) 2012 - 2013 Guillaume Martres
5 * Copyright (C) 2012 - 2013 Gildas Cocherel
7 * This file is part of FFmpeg.
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.
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.
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
24 #include "libavutil/avassert.h"
25 #include "libavutil/pixdesc.h"
32 void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
34 /* frame->frame can be NULL if context init failed */
35 if (!frame->frame || !frame->frame->buf[0])
38 frame->flags &= ~flags;
40 ff_thread_release_buffer(s->avctx, &frame->tf);
42 av_buffer_unref(&frame->tab_mvf_buf);
43 frame->tab_mvf = NULL;
45 av_buffer_unref(&frame->rpl_buf);
46 av_buffer_unref(&frame->rpl_tab_buf);
47 frame->rpl_tab = NULL;
48 frame->refPicList = NULL;
50 frame->collocated_ref = NULL;
52 av_buffer_unref(&frame->hwaccel_priv_buf);
53 frame->hwaccel_picture_private = NULL;
57 RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *ref, int x0, int y0)
59 int x_cb = x0 >> s->ps.sps->log2_ctb_size;
60 int y_cb = y0 >> s->ps.sps->log2_ctb_size;
61 int pic_width_cb = s->ps.sps->ctb_width;
62 int ctb_addr_ts = s->ps.pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
63 return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
66 void ff_hevc_clear_refs(HEVCContext *s)
69 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
70 ff_hevc_unref_frame(s, &s->DPB[i],
71 HEVC_FRAME_FLAG_SHORT_REF |
72 HEVC_FRAME_FLAG_LONG_REF);
75 void ff_hevc_flush_dpb(HEVCContext *s)
78 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
79 ff_hevc_unref_frame(s, &s->DPB[i], ~0);
82 static HEVCFrame *alloc_frame(HEVCContext *s)
85 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
86 HEVCFrame *frame = &s->DPB[i];
87 if (frame->frame->buf[0])
90 ret = ff_thread_get_buffer(s->avctx, &frame->tf,
91 AV_GET_BUFFER_FLAG_REF);
95 frame->rpl_buf = av_buffer_allocz(s->pkt.nb_nals * sizeof(RefPicListTab));
99 frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
100 if (!frame->tab_mvf_buf)
102 frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
104 frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
105 if (!frame->rpl_tab_buf)
107 frame->rpl_tab = (RefPicListTab **)frame->rpl_tab_buf->data;
108 frame->ctb_count = s->ps.sps->ctb_width * s->ps.sps->ctb_height;
109 for (j = 0; j < frame->ctb_count; j++)
110 frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
112 frame->frame->top_field_first = s->sei.picture_timing.picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
113 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);
115 if (s->avctx->hwaccel) {
116 const AVHWAccel *hwaccel = s->avctx->hwaccel;
117 av_assert0(!frame->hwaccel_picture_private);
118 if (hwaccel->frame_priv_data_size) {
119 frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
120 if (!frame->hwaccel_priv_buf)
122 frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data;
128 ff_hevc_unref_frame(s, frame, ~0);
131 av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
135 int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
140 /* check that this POC doesn't already exist */
141 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
142 HEVCFrame *frame = &s->DPB[i];
144 if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
146 av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
148 return AVERROR_INVALIDDATA;
152 ref = alloc_frame(s);
154 return AVERROR(ENOMEM);
159 if (s->sh.pic_output_flag)
160 ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
162 ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
165 ref->sequence = s->seq_decode;
166 ref->window = s->ps.sps->output_window;
171 int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
175 int min_poc = INT_MAX;
178 if (s->sh.no_output_of_prior_pics_flag == 1 && s->no_rasl_output_flag == 1) {
179 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
180 HEVCFrame *frame = &s->DPB[i];
181 if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc &&
182 frame->sequence == s->seq_output) {
183 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
188 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
189 HEVCFrame *frame = &s->DPB[i];
190 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
191 frame->sequence == s->seq_output) {
193 if (frame->poc < min_poc || nb_output == 1) {
194 min_poc = frame->poc;
200 /* wait for more frames before output */
201 if (!flush && s->seq_output == s->seq_decode && s->ps.sps &&
202 nb_output <= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].num_reorder_pics)
206 HEVCFrame *frame = &s->DPB[min_idx];
208 AVFrame *src = frame->frame;
209 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
210 int pixel_shift = !!(desc->comp[0].depth > 8);
212 ret = av_frame_ref(out, src);
213 if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
214 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_BUMPING);
216 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
220 for (i = 0; i < 3; i++) {
221 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
222 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
223 int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
224 (frame->window.top_offset >> vshift) * dst->linesize[i];
227 av_log(s->avctx, AV_LOG_DEBUG,
228 "Output frame with POC %d.\n", frame->poc);
232 if (s->seq_output != s->seq_decode)
233 s->seq_output = (s->seq_output + 1) & 0xff;
241 void ff_hevc_bump_frame(HEVCContext *s)
244 int min_poc = INT_MAX;
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) {
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;
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;
281 static int init_slice_rpl(HEVCContext *s)
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];
288 if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
289 return AVERROR_INVALIDDATA;
291 for (i = ctb_addr_ts; i < ctb_count; i++)
292 frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
294 frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
299 int ff_hevc_slice_rpl(HEVCContext *s)
301 SliceHeader *sh = &s->sh;
303 uint8_t nb_list = sh->slice_type == HEVC_SLICE_B ? 2 : 1;
307 ret = init_slice_rpl(s);
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;
317 for (list_idx = 0; list_idx < nb_list; list_idx++) {
318 RefPicList rpl_tmp = { { 0 } };
319 RefPicList *rpl = &s->ref->refPicList[list_idx];
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,
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;
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];
346 if (idx >= rpl_tmp.nb_refs) {
347 av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
348 return AVERROR_INVALIDDATA;
351 rpl->list[i] = rpl_tmp.list[idx];
352 rpl->ref[i] = rpl_tmp.ref[idx];
353 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
357 memcpy(rpl, &rpl_tmp, sizeof(*rpl));
358 rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
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];
369 static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
372 int LtMask = (1 << s->ps.sps->log2_max_poc_lsb) - 1;
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 & LtMask) == poc)
382 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
383 HEVCFrame *ref = &s->DPB[i];
384 if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
385 if (ref->poc == poc || (ref->poc & LtMask) == poc)
390 if (s->nal_unit_type != HEVC_NAL_CRA_NUT && !IS_BLA(s))
391 av_log(s->avctx, AV_LOG_ERROR,
392 "Could not find ref with POC %d\n", poc);
396 static void mark_ref(HEVCFrame *frame, int flag)
398 frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
399 frame->flags |= flag;
402 static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
407 frame = alloc_frame(s);
411 if (!s->avctx->hwaccel) {
412 if (!s->ps.sps->pixel_shift) {
413 for (i = 0; frame->frame->buf[i]; i++)
414 memset(frame->frame->buf[i]->data, 1 << (s->ps.sps->bit_depth - 1),
415 frame->frame->buf[i]->size);
417 for (i = 0; frame->frame->data[i]; i++)
418 for (y = 0; y < (s->ps.sps->height >> s->ps.sps->vshift[i]); y++)
419 for (x = 0; x < (s->ps.sps->width >> s->ps.sps->hshift[i]); x++) {
420 AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
421 1 << (s->ps.sps->bit_depth - 1));
427 frame->sequence = s->seq_decode;
430 if (s->threads_type == FF_THREAD_FRAME)
431 ff_thread_report_progress(&frame->tf, INT_MAX, 0);
436 /* add a reference with the given poc to the list and mark it as used in DPB */
437 static int add_candidate_ref(HEVCContext *s, RefPicList *list,
438 int poc, int ref_flag)
440 HEVCFrame *ref = find_ref_idx(s, poc);
443 return AVERROR_INVALIDDATA;
446 ref = generate_missing_ref(s, poc);
448 return AVERROR(ENOMEM);
451 list->list[list->nb_refs] = ref->poc;
452 list->ref[list->nb_refs] = ref;
455 mark_ref(ref, ref_flag);
459 int ff_hevc_frame_rps(HEVCContext *s)
461 const ShortTermRPS *short_rps = s->sh.short_term_rps;
462 const LongTermRPS *long_rps = &s->sh.long_term_rps;
463 RefPicList *rps = s->rps;
467 rps[0].nb_refs = rps[1].nb_refs = 0;
471 /* clear the reference flags on all frames except the current one */
472 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
473 HEVCFrame *frame = &s->DPB[i];
481 for (i = 0; i < NB_RPS_TYPE; i++)
484 /* add the short refs */
485 for (i = 0; i < short_rps->num_delta_pocs; i++) {
486 int poc = s->poc + short_rps->delta_poc[i];
489 if (!short_rps->used[i])
491 else if (i < short_rps->num_negative_pics)
496 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
501 /* add the long refs */
502 for (i = 0; i < long_rps->nb_refs; i++) {
503 int poc = long_rps->poc[i];
504 int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
506 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
512 /* release any frames that are now unused */
513 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
514 ff_hevc_unref_frame(s, &s->DPB[i], 0);
519 int ff_hevc_frame_nb_refs(HEVCContext *s)
523 const ShortTermRPS *rps = s->sh.short_term_rps;
524 LongTermRPS *long_rps = &s->sh.long_term_rps;
527 for (i = 0; i < rps->num_negative_pics; i++)
528 ret += !!rps->used[i];
529 for (; i < rps->num_delta_pocs; i++)
530 ret += !!rps->used[i];
534 for (i = 0; i < long_rps->nb_refs; i++)
535 ret += !!long_rps->used[i];