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 ref->sequence = s->seq_decode;
150 ref->window = s->sps->output_window;
155 int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
159 int min_poc = INT_MAX;
162 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
163 HEVCFrame *frame = &s->DPB[i];
164 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
165 frame->sequence == s->seq_output) {
167 if (frame->poc < min_poc) {
168 min_poc = frame->poc;
174 /* wait for more frames before output */
175 if (!flush && s->seq_output == s->seq_decode && s->sps &&
176 nb_output <= s->sps->temporal_layer[s->sps->max_sub_layers - 1].num_reorder_pics)
180 HEVCFrame *frame = &s->DPB[min_idx];
182 AVFrame *src = frame->frame;
183 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
184 int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);
186 ret = av_frame_ref(out, src);
187 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
191 for (i = 0; i < 3; i++) {
192 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
193 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
194 int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
195 (frame->window.top_offset >> vshift) * dst->linesize[i];
198 av_log(s->avctx, AV_LOG_DEBUG,
199 "Output frame with POC %d.\n", frame->poc);
203 if (s->seq_output != s->seq_decode)
204 s->seq_output = (s->seq_output + 1) & 0xff;
212 static int init_slice_rpl(HEVCContext *s)
214 HEVCFrame *frame = s->ref;
215 int ctb_count = frame->ctb_count;
216 int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
219 if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
220 return AVERROR_INVALIDDATA;
222 for (i = ctb_addr_ts; i < ctb_count; i++)
223 frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
225 frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
230 int ff_hevc_slice_rpl(HEVCContext *s)
232 SliceHeader *sh = &s->sh;
234 uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
238 ret = init_slice_rpl(s);
242 if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
243 s->rps[LT_CURR].nb_refs)) {
244 av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
245 return AVERROR_INVALIDDATA;
248 for (list_idx = 0; list_idx < nb_list; list_idx++) {
249 RefPicList rpl_tmp = { { 0 } };
250 RefPicList *rpl = &s->ref->refPicList[list_idx];
252 /* The order of the elements is
253 * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
254 * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
255 int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
256 list_idx ? ST_CURR_BEF : ST_CURR_AFT,
259 /* concatenate the candidate lists for the current frame */
260 while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
261 for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
262 RefPicList *rps = &s->rps[cand_lists[i]];
263 for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
264 rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
265 rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
266 rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
272 /* reorder the references if necessary */
273 if (sh->rpl_modification_flag[list_idx]) {
274 for (i = 0; i < sh->nb_refs[list_idx]; i++) {
275 int idx = sh->list_entry_lx[list_idx][i];
277 if (idx >= rpl_tmp.nb_refs) {
278 av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
279 return AVERROR_INVALIDDATA;
282 rpl->list[i] = rpl_tmp.list[idx];
283 rpl->ref[i] = rpl_tmp.ref[idx];
284 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
288 memcpy(rpl, &rpl_tmp, sizeof(*rpl));
289 rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
292 if (sh->collocated_list == list_idx &&
293 sh->collocated_ref_idx < rpl->nb_refs)
294 s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
300 static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
303 int LtMask = (1 << s->sps->log2_max_poc_lsb) - 1;
305 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
306 HEVCFrame *ref = &s->DPB[i];
307 if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
308 if ((ref->poc & LtMask) == poc)
313 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
314 HEVCFrame *ref = &s->DPB[i];
315 if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
316 if (ref->poc == poc || (ref->poc & LtMask) == poc)
321 av_log(s->avctx, AV_LOG_ERROR,
322 "Could not find ref with POC %d\n", poc);
326 static void mark_ref(HEVCFrame *frame, int flag)
328 frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
329 frame->flags |= flag;
332 static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
337 frame = alloc_frame(s);
341 if (!s->sps->pixel_shift) {
342 for (i = 0; frame->frame->buf[i]; i++)
343 memset(frame->frame->buf[i]->data, 1 << (s->sps->bit_depth - 1),
344 frame->frame->buf[i]->size);
346 for (i = 0; frame->frame->data[i]; i++)
347 for (y = 0; y < (s->sps->height >> s->sps->vshift[i]); y++)
348 for (x = 0; x < (s->sps->width >> s->sps->hshift[i]); x++) {
349 AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
350 1 << (s->sps->bit_depth - 1));
355 frame->sequence = s->seq_decode;
358 if (s->threads_type == FF_THREAD_FRAME)
359 ff_thread_report_progress(&frame->tf, INT_MAX, 0);
364 /* add a reference with the given poc to the list and mark it as used in DPB */
365 static int add_candidate_ref(HEVCContext *s, RefPicList *list,
366 int poc, int ref_flag)
368 HEVCFrame *ref = find_ref_idx(s, poc);
371 return AVERROR_INVALIDDATA;
374 ref = generate_missing_ref(s, poc);
376 return AVERROR(ENOMEM);
379 list->list[list->nb_refs] = ref->poc;
380 list->ref[list->nb_refs] = ref;
383 mark_ref(ref, ref_flag);
387 int ff_hevc_frame_rps(HEVCContext *s)
389 const ShortTermRPS *short_rps = s->sh.short_term_rps;
390 const LongTermRPS *long_rps = &s->sh.long_term_rps;
391 RefPicList *rps = s->rps;
395 rps[0].nb_refs = rps[1].nb_refs = 0;
399 /* clear the reference flags on all frames except the current one */
400 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
401 HEVCFrame *frame = &s->DPB[i];
409 for (i = 0; i < NB_RPS_TYPE; i++)
412 /* add the short refs */
413 for (i = 0; i < short_rps->num_delta_pocs; i++) {
414 int poc = s->poc + short_rps->delta_poc[i];
417 if (!short_rps->used[i])
419 else if (i < short_rps->num_negative_pics)
424 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
429 /* add the long refs */
430 for (i = 0; i < long_rps->nb_refs; i++) {
431 int poc = long_rps->poc[i];
432 int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
434 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
439 /* release any frames that are now unused */
440 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
441 ff_hevc_unref_frame(s, &s->DPB[i], 0);
446 int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
448 int max_poc_lsb = 1 << s->sps->log2_max_poc_lsb;
449 int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
450 int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
453 if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
454 poc_msb = prev_poc_msb + max_poc_lsb;
455 else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
456 poc_msb = prev_poc_msb - max_poc_lsb;
458 poc_msb = prev_poc_msb;
460 // For BLA picture types, POCmsb is set to 0.
461 if (s->nal_unit_type == NAL_BLA_W_LP ||
462 s->nal_unit_type == NAL_BLA_W_RADL ||
463 s->nal_unit_type == NAL_BLA_N_LP)
466 return poc_msb + poc_lsb;
469 int ff_hevc_frame_nb_refs(HEVCContext *s)
473 const ShortTermRPS *rps = s->sh.short_term_rps;
474 LongTermRPS *long_rps = &s->sh.long_term_rps;
477 for (i = 0; i < rps->num_negative_pics; i++)
478 ret += !!rps->used[i];
479 for (; i < rps->num_delta_pocs; i++)
480 ret += !!rps->used[i];
484 for (i = 0; i < long_rps->nb_refs; i++)
485 ret += !!long_rps->used[i];