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"
31 void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
33 /* frame->frame can be NULL if context init failed */
34 if (!frame->frame || !frame->frame->buf[0])
37 frame->flags &= ~flags;
39 ff_thread_release_buffer(s->avctx, &frame->tf);
41 av_buffer_unref(&frame->tab_mvf_buf);
42 frame->tab_mvf = NULL;
44 av_buffer_unref(&frame->rpl_buf);
45 av_buffer_unref(&frame->rpl_tab_buf);
46 frame->rpl_tab = NULL;
47 frame->refPicList = NULL;
49 frame->collocated_ref = NULL;
51 av_buffer_unref(&frame->hwaccel_priv_buf);
52 frame->hwaccel_picture_private = NULL;
56 RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *ref, int x0, int y0)
58 int x_cb = x0 >> s->sps->log2_ctb_size;
59 int y_cb = y0 >> s->sps->log2_ctb_size;
60 int pic_width_cb = s->sps->ctb_width;
61 int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
62 return (RefPicList *)ref->rpl_tab[ctb_addr_ts];
65 void ff_hevc_clear_refs(HEVCContext *s)
68 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
69 ff_hevc_unref_frame(s, &s->DPB[i],
70 HEVC_FRAME_FLAG_SHORT_REF |
71 HEVC_FRAME_FLAG_LONG_REF);
74 void ff_hevc_flush_dpb(HEVCContext *s)
77 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
78 ff_hevc_unref_frame(s, &s->DPB[i], ~0);
81 static HEVCFrame *alloc_frame(HEVCContext *s)
84 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
85 HEVCFrame *frame = &s->DPB[i];
86 if (frame->frame->buf[0])
89 ret = ff_thread_get_buffer(s->avctx, &frame->tf,
90 AV_GET_BUFFER_FLAG_REF);
94 frame->rpl_buf = av_buffer_allocz(s->nb_nals * sizeof(RefPicListTab));
98 frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
99 if (!frame->tab_mvf_buf)
101 frame->tab_mvf = (MvField *)frame->tab_mvf_buf->data;
103 frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
104 if (!frame->rpl_tab_buf)
106 frame->rpl_tab = (RefPicListTab **)frame->rpl_tab_buf->data;
107 frame->ctb_count = s->sps->ctb_width * s->sps->ctb_height;
108 for (j = 0; j < frame->ctb_count; j++)
109 frame->rpl_tab[j] = (RefPicListTab *)frame->rpl_buf->data;
111 frame->frame->top_field_first = s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
112 frame->frame->interlaced_frame = (s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) || (s->picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
114 if (s->avctx->hwaccel) {
115 const AVHWAccel *hwaccel = s->avctx->hwaccel;
116 av_assert0(!frame->hwaccel_picture_private);
117 if (hwaccel->frame_priv_data_size) {
118 frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
119 if (!frame->hwaccel_priv_buf)
121 frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data;
127 ff_hevc_unref_frame(s, frame, ~0);
130 av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
134 int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
139 /* check that this POC doesn't already exist */
140 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
141 HEVCFrame *frame = &s->DPB[i];
143 if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
145 av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
147 return AVERROR_INVALIDDATA;
151 ref = alloc_frame(s);
153 return AVERROR(ENOMEM);
158 if (s->sh.pic_output_flag)
159 ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
161 ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
164 ref->sequence = s->seq_decode;
165 ref->window = s->sps->output_window;
170 int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
174 int min_poc = INT_MAX;
177 if (s->sh.no_output_of_prior_pics_flag == 1) {
178 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
179 HEVCFrame *frame = &s->DPB[i];
180 if (!(frame->flags & HEVC_FRAME_FLAG_BUMPING) && frame->poc != s->poc &&
181 frame->sequence == s->seq_output) {
182 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
187 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
188 HEVCFrame *frame = &s->DPB[i];
189 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
190 frame->sequence == s->seq_output) {
192 if (frame->poc < min_poc || nb_output == 1) {
193 min_poc = frame->poc;
199 /* wait for more frames before output */
200 if (!flush && s->seq_output == s->seq_decode && s->sps &&
201 nb_output <= s->sps->temporal_layer[s->sps->max_sub_layers - 1].num_reorder_pics)
205 HEVCFrame *frame = &s->DPB[min_idx];
207 AVFrame *src = frame->frame;
208 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
209 int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);
211 ret = av_frame_ref(out, src);
212 if (frame->flags & HEVC_FRAME_FLAG_BUMPING)
213 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_BUMPING);
215 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
219 for (i = 0; i < 3; i++) {
220 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
221 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
222 int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
223 (frame->window.top_offset >> vshift) * dst->linesize[i];
226 av_log(s->avctx, AV_LOG_DEBUG,
227 "Output frame with POC %d.\n", frame->poc);
231 if (s->seq_output != s->seq_decode)
232 s->seq_output = (s->seq_output + 1) & 0xff;
240 void ff_hevc_bump_frame(HEVCContext *s)
243 int min_poc = INT_MAX;
246 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
247 HEVCFrame *frame = &s->DPB[i];
248 if ((frame->flags) &&
249 frame->sequence == s->seq_output &&
250 frame->poc != s->poc) {
255 if (s->sps && dpb >= s->sps->temporal_layer[s->sps->max_sub_layers - 1].max_dec_pic_buffering) {
256 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
257 HEVCFrame *frame = &s->DPB[i];
258 if ((frame->flags) &&
259 frame->sequence == s->seq_output &&
260 frame->poc != s->poc) {
261 if (frame->flags == HEVC_FRAME_FLAG_OUTPUT && frame->poc < min_poc) {
262 min_poc = frame->poc;
267 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
268 HEVCFrame *frame = &s->DPB[i];
269 if (frame->flags & HEVC_FRAME_FLAG_OUTPUT &&
270 frame->sequence == s->seq_output &&
271 frame->poc <= min_poc) {
272 frame->flags |= HEVC_FRAME_FLAG_BUMPING;
280 static int init_slice_rpl(HEVCContext *s)
282 HEVCFrame *frame = s->ref;
283 int ctb_count = frame->ctb_count;
284 int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
287 if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
288 return AVERROR_INVALIDDATA;
290 for (i = ctb_addr_ts; i < ctb_count; i++)
291 frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
293 frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
298 int ff_hevc_slice_rpl(HEVCContext *s)
300 SliceHeader *sh = &s->sh;
302 uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
306 ret = init_slice_rpl(s);
310 if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
311 s->rps[LT_CURR].nb_refs)) {
312 av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
313 return AVERROR_INVALIDDATA;
316 for (list_idx = 0; list_idx < nb_list; list_idx++) {
317 RefPicList rpl_tmp = { { 0 } };
318 RefPicList *rpl = &s->ref->refPicList[list_idx];
320 /* The order of the elements is
321 * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
322 * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
323 int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
324 list_idx ? ST_CURR_BEF : ST_CURR_AFT,
327 /* concatenate the candidate lists for the current frame */
328 while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
329 for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
330 RefPicList *rps = &s->rps[cand_lists[i]];
331 for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
332 rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
333 rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
334 rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
340 /* reorder the references if necessary */
341 if (sh->rpl_modification_flag[list_idx]) {
342 for (i = 0; i < sh->nb_refs[list_idx]; i++) {
343 int idx = sh->list_entry_lx[list_idx][i];
345 if (idx >= rpl_tmp.nb_refs) {
346 av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
347 return AVERROR_INVALIDDATA;
350 rpl->list[i] = rpl_tmp.list[idx];
351 rpl->ref[i] = rpl_tmp.ref[idx];
352 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
356 memcpy(rpl, &rpl_tmp, sizeof(*rpl));
357 rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
360 if (sh->collocated_list == list_idx &&
361 sh->collocated_ref_idx < rpl->nb_refs)
362 s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
368 static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
371 int LtMask = (1 << s->sps->log2_max_poc_lsb) - 1;
373 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
374 HEVCFrame *ref = &s->DPB[i];
375 if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
376 if ((ref->poc & LtMask) == poc)
381 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
382 HEVCFrame *ref = &s->DPB[i];
383 if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
384 if (ref->poc == poc || (ref->poc & LtMask) == poc)
389 if (s->nal_unit_type != NAL_CRA_NUT && !IS_BLA(s))
390 av_log(s->avctx, AV_LOG_ERROR,
391 "Could not find ref with POC %d\n", poc);
395 static void mark_ref(HEVCFrame *frame, int flag)
397 frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
398 frame->flags |= flag;
401 static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
406 frame = alloc_frame(s);
410 if (!s->avctx->hwaccel) {
411 if (!s->sps->pixel_shift) {
412 for (i = 0; frame->frame->buf[i]; i++)
413 memset(frame->frame->buf[i]->data, 1 << (s->sps->bit_depth - 1),
414 frame->frame->buf[i]->size);
416 for (i = 0; frame->frame->data[i]; i++)
417 for (y = 0; y < (s->sps->height >> s->sps->vshift[i]); y++)
418 for (x = 0; x < (s->sps->width >> s->sps->hshift[i]); x++) {
419 AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
420 1 << (s->sps->bit_depth - 1));
426 frame->sequence = s->seq_decode;
429 if (s->threads_type == FF_THREAD_FRAME)
430 ff_thread_report_progress(&frame->tf, INT_MAX, 0);
435 /* add a reference with the given poc to the list and mark it as used in DPB */
436 static int add_candidate_ref(HEVCContext *s, RefPicList *list,
437 int poc, int ref_flag)
439 HEVCFrame *ref = find_ref_idx(s, poc);
442 return AVERROR_INVALIDDATA;
445 ref = generate_missing_ref(s, poc);
447 return AVERROR(ENOMEM);
450 list->list[list->nb_refs] = ref->poc;
451 list->ref[list->nb_refs] = ref;
454 mark_ref(ref, ref_flag);
458 int ff_hevc_frame_rps(HEVCContext *s)
460 const ShortTermRPS *short_rps = s->sh.short_term_rps;
461 const LongTermRPS *long_rps = &s->sh.long_term_rps;
462 RefPicList *rps = s->rps;
466 rps[0].nb_refs = rps[1].nb_refs = 0;
470 /* clear the reference flags on all frames except the current one */
471 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
472 HEVCFrame *frame = &s->DPB[i];
480 for (i = 0; i < NB_RPS_TYPE; i++)
483 /* add the short refs */
484 for (i = 0; i < short_rps->num_delta_pocs; i++) {
485 int poc = s->poc + short_rps->delta_poc[i];
488 if (!short_rps->used[i])
490 else if (i < short_rps->num_negative_pics)
495 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
500 /* add the long refs */
501 for (i = 0; i < long_rps->nb_refs; i++) {
502 int poc = long_rps->poc[i];
503 int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
505 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
511 /* release any frames that are now unused */
512 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
513 ff_hevc_unref_frame(s, &s->DPB[i], 0);
518 int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
520 int max_poc_lsb = 1 << s->sps->log2_max_poc_lsb;
521 int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
522 int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
525 if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
526 poc_msb = prev_poc_msb + max_poc_lsb;
527 else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
528 poc_msb = prev_poc_msb - max_poc_lsb;
530 poc_msb = prev_poc_msb;
532 // For BLA picture types, POCmsb is set to 0.
533 if (s->nal_unit_type == NAL_BLA_W_LP ||
534 s->nal_unit_type == NAL_BLA_W_RADL ||
535 s->nal_unit_type == NAL_BLA_N_LP)
538 return poc_msb + poc_lsb;
541 int ff_hevc_frame_nb_refs(HEVCContext *s)
545 const ShortTermRPS *rps = s->sh.short_term_rps;
546 LongTermRPS *long_rps = &s->sh.long_term_rps;
549 for (i = 0; i < rps->num_negative_pics; i++)
550 ret += !!rps->used[i];
551 for (; i < rps->num_delta_pocs; i++)
552 ret += !!rps->used[i];
556 for (i = 0; i < long_rps->nb_refs; i++)
557 ret += !!long_rps->used[i];