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/pixdesc.h"
30 void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags)
32 /* frame->frame can be NULL if context init failed */
33 if (!frame->frame || !frame->frame->buf[0])
36 frame->flags &= ~flags;
38 ff_thread_release_buffer(s->avctx, &frame->tf);
40 av_buffer_unref(&frame->tab_mvf_buf);
41 frame->tab_mvf = NULL;
43 av_buffer_unref(&frame->rpl_buf);
44 av_buffer_unref(&frame->rpl_tab_buf);
45 frame->rpl_tab = NULL;
46 frame->refPicList = NULL;
48 frame->collocated_ref = NULL;
52 RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *ref, int x0, int y0)
54 if (x0 < 0 || y0 < 0) {
55 return s->ref->refPicList;
57 int x_cb = x0 >> s->sps->log2_ctb_size;
58 int y_cb = y0 >> s->sps->log2_ctb_size;
59 int pic_width_cb = (s->sps->width + (1 << s->sps->log2_ctb_size) - 1) >>
60 s->sps->log2_ctb_size;
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];
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->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->sps->ctb_width * s->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->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
113 frame->frame->interlaced_frame = (s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) || (s->picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
116 ff_hevc_unref_frame(s, frame, ~0);
119 av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
123 int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
128 /* check that this POC doesn't already exist */
129 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
130 HEVCFrame *frame = &s->DPB[i];
132 if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
134 av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
136 return AVERROR_INVALIDDATA;
140 ref = alloc_frame(s);
142 return AVERROR(ENOMEM);
148 ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
149 if (s->sh.pic_output_flag == 0)
150 ref->flags &= ~(HEVC_FRAME_FLAG_OUTPUT);
151 ref->sequence = s->seq_decode;
152 ref->window = s->sps->output_window;
157 int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
161 int min_poc = INT_MAX;
164 if (s->sh.no_output_of_prior_pics_flag == 1) {
165 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
166 HEVCFrame *frame = &s->DPB[i];
167 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) && frame->poc != s->poc &&
168 frame->sequence == s->seq_output) {
169 frame->flags &= ~(HEVC_FRAME_FLAG_OUTPUT);
174 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
175 HEVCFrame *frame = &s->DPB[i];
176 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
177 frame->sequence == s->seq_output) {
179 if (frame->poc < min_poc) {
180 min_poc = frame->poc;
186 /* wait for more frames before output */
187 if (!flush && s->seq_output == s->seq_decode && s->sps &&
188 nb_output <= s->sps->temporal_layer[s->sps->max_sub_layers - 1].num_reorder_pics)
192 HEVCFrame *frame = &s->DPB[min_idx];
194 AVFrame *src = frame->frame;
195 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
196 int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);
198 ret = av_frame_ref(out, src);
199 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
203 for (i = 0; i < 3; i++) {
204 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
205 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
206 int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
207 (frame->window.top_offset >> vshift) * dst->linesize[i];
210 av_log(s->avctx, AV_LOG_DEBUG,
211 "Output frame with POC %d.\n", frame->poc);
215 if (s->seq_output != s->seq_decode)
216 s->seq_output = (s->seq_output + 1) & 0xff;
224 static int init_slice_rpl(HEVCContext *s)
226 HEVCFrame *frame = s->ref;
227 int ctb_count = frame->ctb_count;
228 int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
231 if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
232 return AVERROR_INVALIDDATA;
234 for (i = ctb_addr_ts; i < ctb_count; i++)
235 frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
237 frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
242 int ff_hevc_slice_rpl(HEVCContext *s)
244 SliceHeader *sh = &s->sh;
246 uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
250 ret = init_slice_rpl(s);
254 if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
255 s->rps[LT_CURR].nb_refs)) {
256 av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
257 return AVERROR_INVALIDDATA;
260 for (list_idx = 0; list_idx < nb_list; list_idx++) {
261 RefPicList rpl_tmp = { { 0 } };
262 RefPicList *rpl = &s->ref->refPicList[list_idx];
264 /* The order of the elements is
265 * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
266 * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
267 int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
268 list_idx ? ST_CURR_BEF : ST_CURR_AFT,
271 /* concatenate the candidate lists for the current frame */
272 while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
273 for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
274 RefPicList *rps = &s->rps[cand_lists[i]];
275 for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
276 rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
277 rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
278 rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
284 /* reorder the references if necessary */
285 if (sh->rpl_modification_flag[list_idx]) {
286 for (i = 0; i < sh->nb_refs[list_idx]; i++) {
287 int idx = sh->list_entry_lx[list_idx][i];
289 if (idx >= rpl_tmp.nb_refs) {
290 av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
291 return AVERROR_INVALIDDATA;
294 rpl->list[i] = rpl_tmp.list[idx];
295 rpl->ref[i] = rpl_tmp.ref[idx];
296 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
300 memcpy(rpl, &rpl_tmp, sizeof(*rpl));
301 rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
304 if (sh->collocated_list == list_idx &&
305 sh->collocated_ref_idx < rpl->nb_refs)
306 s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
312 static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
315 int LtMask = (1 << s->sps->log2_max_poc_lsb) - 1;
317 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
318 HEVCFrame *ref = &s->DPB[i];
319 if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
320 if ((ref->poc & LtMask) == poc)
325 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
326 HEVCFrame *ref = &s->DPB[i];
327 if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
328 if (ref->poc == poc || (ref->poc & LtMask) == poc)
333 av_log(s->avctx, AV_LOG_ERROR,
334 "Could not find ref with POC %d\n", poc);
338 static void mark_ref(HEVCFrame *frame, int flag)
340 frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
341 frame->flags |= flag;
344 static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
349 frame = alloc_frame(s);
353 if (!s->sps->pixel_shift) {
354 for (i = 0; frame->frame->buf[i]; i++)
355 memset(frame->frame->buf[i]->data, 1 << (s->sps->bit_depth - 1),
356 frame->frame->buf[i]->size);
358 for (i = 0; frame->frame->data[i]; i++)
359 for (y = 0; y < (s->sps->height >> s->sps->vshift[i]); y++)
360 for (x = 0; x < (s->sps->width >> s->sps->hshift[i]); x++) {
361 AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
362 1 << (s->sps->bit_depth - 1));
367 frame->sequence = s->seq_decode;
370 if (s->threads_type == FF_THREAD_FRAME)
371 ff_thread_report_progress(&frame->tf, INT_MAX, 0);
376 /* add a reference with the given poc to the list and mark it as used in DPB */
377 static int add_candidate_ref(HEVCContext *s, RefPicList *list,
378 int poc, int ref_flag)
380 HEVCFrame *ref = find_ref_idx(s, poc);
383 return AVERROR_INVALIDDATA;
386 ref = generate_missing_ref(s, poc);
388 return AVERROR(ENOMEM);
391 list->list[list->nb_refs] = ref->poc;
392 list->ref[list->nb_refs] = ref;
395 mark_ref(ref, ref_flag);
399 int ff_hevc_frame_rps(HEVCContext *s)
401 const ShortTermRPS *short_rps = s->sh.short_term_rps;
402 const LongTermRPS *long_rps = &s->sh.long_term_rps;
403 RefPicList *rps = s->rps;
407 rps[0].nb_refs = rps[1].nb_refs = 0;
411 /* clear the reference flags on all frames except the current one */
412 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
413 HEVCFrame *frame = &s->DPB[i];
421 for (i = 0; i < NB_RPS_TYPE; i++)
424 /* add the short refs */
425 for (i = 0; i < short_rps->num_delta_pocs; i++) {
426 int poc = s->poc + short_rps->delta_poc[i];
429 if (!short_rps->used[i])
431 else if (i < short_rps->num_negative_pics)
436 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
441 /* add the long refs */
442 for (i = 0; i < long_rps->nb_refs; i++) {
443 int poc = long_rps->poc[i];
444 int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
446 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
451 /* release any frames that are now unused */
452 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
453 ff_hevc_unref_frame(s, &s->DPB[i], 0);
458 int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
460 int max_poc_lsb = 1 << s->sps->log2_max_poc_lsb;
461 int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
462 int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
465 if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
466 poc_msb = prev_poc_msb + max_poc_lsb;
467 else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
468 poc_msb = prev_poc_msb - max_poc_lsb;
470 poc_msb = prev_poc_msb;
472 // For BLA picture types, POCmsb is set to 0.
473 if (s->nal_unit_type == NAL_BLA_W_LP ||
474 s->nal_unit_type == NAL_BLA_W_RADL ||
475 s->nal_unit_type == NAL_BLA_N_LP)
478 return poc_msb + poc_lsb;
481 int ff_hevc_frame_nb_refs(HEVCContext *s)
485 const ShortTermRPS *rps = s->sh.short_term_rps;
486 LongTermRPS *long_rps = &s->sh.long_term_rps;
489 for (i = 0; i < rps->num_negative_pics; i++)
490 ret += !!rps->used[i];
491 for (; i < rps->num_delta_pocs; i++)
492 ret += !!rps->used[i];
496 for (i = 0; i < long_rps->nb_refs; i++)
497 ret += !!long_rps->used[i];