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 ) >> s->sps->log2_ctb_size;
60 int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[y_cb * pic_width_cb + x_cb];
61 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 | HEVC_FRAME_FLAG_LONG_REF);
73 void ff_hevc_flush_dpb(HEVCContext *s)
76 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
77 ff_hevc_unref_frame(s, &s->DPB[i], ~0);
80 static HEVCFrame *alloc_frame(HEVCContext *s)
83 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
84 HEVCFrame *frame = &s->DPB[i];
85 if (frame->frame->buf[0])
88 ret = ff_thread_get_buffer(s->avctx, &frame->tf, AV_GET_BUFFER_FLAG_REF);
92 frame->rpl_buf = av_buffer_allocz(s->nb_nals * sizeof(RefPicListTab));
96 frame->tab_mvf_buf = av_buffer_pool_get(s->tab_mvf_pool);
97 if (!frame->tab_mvf_buf)
99 frame->tab_mvf = (MvField*)frame->tab_mvf_buf->data;
101 frame->rpl_tab_buf = av_buffer_pool_get(s->rpl_tab_pool);
102 if (!frame->rpl_tab_buf)
104 frame->rpl_tab = (RefPicListTab**)frame->rpl_tab_buf->data;
105 frame->ctb_count = s->sps->ctb_width * s->sps->ctb_height;
106 for (j = 0; j < frame->ctb_count; j++)
107 frame->rpl_tab[j] = (RefPicListTab*)frame->rpl_buf->data;
109 frame->frame->top_field_first = s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD;
110 frame->frame->interlaced_frame = (s->picture_struct == AV_PICTURE_STRUCTURE_TOP_FIELD) || (s->picture_struct == AV_PICTURE_STRUCTURE_BOTTOM_FIELD);
113 ff_hevc_unref_frame(s, frame, ~0);
116 av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
120 int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
125 /* check that this POC doesn't already exist */
126 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
127 HEVCFrame *frame = &s->DPB[i];
129 if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
131 av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
133 return AVERROR_INVALIDDATA;
137 ref = alloc_frame(s);
139 return AVERROR(ENOMEM);
145 ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
146 ref->sequence = s->seq_decode;
147 ref->window = s->sps->output_window;
152 int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
156 int min_poc = INT_MAX;
157 int i, j, min_idx, ret;
159 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
160 HEVCFrame *frame = &s->DPB[i];
161 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
162 frame->sequence == s->seq_output) {
164 if (frame->poc < min_poc) {
165 min_poc = frame->poc;
171 /* wait for more frames before output */
172 if (!flush && s->seq_output == s->seq_decode && s->sps &&
173 nb_output <= s->sps->temporal_layer[s->sps->max_sub_layers - 1].num_reorder_pics)
177 HEVCFrame *frame = &s->DPB[min_idx];
179 AVFrame *src = frame->frame;
180 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(src->format);
181 int pixel_shift = !!(desc->comp[0].depth_minus1 > 7);
183 ret = av_frame_ref(out, src);
184 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
188 for (j = 0; j < 3; j++) {
189 int hshift = (j > 0) ? desc->log2_chroma_w : 0;
190 int vshift = (j > 0) ? desc->log2_chroma_h : 0;
191 int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
192 (frame->window.top_offset >> vshift) * dst->linesize[j];
195 av_log(s->avctx, AV_LOG_DEBUG, "Output frame with POC %d.\n", frame->poc);
199 if (s->seq_output != s->seq_decode)
200 s->seq_output = (s->seq_output + 1) & 0xff;
208 static int init_slice_rpl(HEVCContext *s)
210 HEVCFrame *frame = s->ref;
211 int ctb_count = frame->ctb_count;
212 int ctb_addr_ts = s->pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
215 if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
216 return AVERROR_INVALIDDATA;
218 for (i = ctb_addr_ts; i < ctb_count; i++)
219 frame->rpl_tab[i] = (RefPicListTab*)frame->rpl_buf->data + s->slice_idx;
221 frame->refPicList = (RefPicList*)frame->rpl_tab[ctb_addr_ts];
226 int ff_hevc_slice_rpl(HEVCContext *s)
228 SliceHeader *sh = &s->sh;
230 uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
234 ret = init_slice_rpl(s);
238 if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
239 s->rps[LT_CURR].nb_refs)) {
240 av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
241 return AVERROR_INVALIDDATA;
244 for (list_idx = 0; list_idx < nb_list; list_idx++) {
245 RefPicList rpl_tmp = { { 0 } };
246 RefPicList *rpl = &s->ref->refPicList[list_idx];
248 /* The order of the elements is
249 * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
250 * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1
252 int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
253 list_idx ? ST_CURR_BEF : ST_CURR_AFT,
256 /* concatenate the candidate lists for the current frame */
257 while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
258 for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
259 RefPicList *rps = &s->rps[cand_lists[i]];
260 for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
261 rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
262 rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
263 rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = (i == 2);
269 /* reorder the references if necessary */
270 if (sh->rpl_modification_flag[list_idx]) {
271 for (i = 0; i < sh->nb_refs[list_idx]; i++) {
272 int idx = sh->list_entry_lx[list_idx][i];
274 if (idx >= rpl_tmp.nb_refs) {
275 av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
276 return AVERROR_INVALIDDATA;
279 rpl->list[i] = rpl_tmp.list[idx];
280 rpl->ref[i] = rpl_tmp.ref[idx];
281 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
285 memcpy(rpl, &rpl_tmp, sizeof(*rpl));
286 rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
289 if (sh->collocated_list == list_idx &&
290 sh->collocated_ref_idx < rpl->nb_refs)
291 s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
297 static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
300 int LtMask = (1 << s->sps->log2_max_poc_lsb) - 1;
302 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
303 HEVCFrame *ref = &s->DPB[i];
304 if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
305 if ((ref->poc & LtMask) == poc)
310 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
311 HEVCFrame *ref = &s->DPB[i];
312 if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
313 if (ref->poc == poc || (ref->poc & LtMask) == poc)
318 av_log(s->avctx, AV_LOG_ERROR,
319 "Could not find ref with POC %d\n", poc);
323 static void mark_ref(HEVCFrame *frame, int flag)
325 frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
326 frame->flags |= flag;
329 static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
335 frame = alloc_frame(s);
339 if (!s->sps->pixel_shift) {
340 for (i = 0; frame->frame->buf[i]; i++)
341 memset(frame->frame->buf[i]->data, 1 << (s->sps->bit_depth - 1),
342 frame->frame->buf[i]->size);
344 for (i = 0; frame->frame->data[i]; i++)
345 for (y = 0; y < (s->sps->height >> s->sps->vshift[i]); y++)
346 for (x = 0; x < (s->sps->width >> s->sps->hshift[i]); x++) {
347 AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
348 1 << (s->sps->bit_depth - 1));
353 frame->sequence = s->seq_decode;
356 if (s->threads_type == FF_THREAD_FRAME)
357 ff_thread_report_progress(&frame->tf, INT_MAX, 0);
362 /* add a reference with the given poc to the list and mark it as used in DPB */
363 static int add_candidate_ref(HEVCContext *s, RefPicList *list,
364 int poc, int ref_flag)
366 HEVCFrame *ref = find_ref_idx(s, poc);
369 return AVERROR_INVALIDDATA;
372 ref = generate_missing_ref(s, poc);
374 return AVERROR(ENOMEM);
377 list->list[list->nb_refs] = ref->poc;
378 list->ref[list->nb_refs] = ref;
381 mark_ref(ref, ref_flag);
385 int ff_hevc_frame_rps(HEVCContext *s)
387 const ShortTermRPS *short_rps = s->sh.short_term_rps;
388 const LongTermRPS *long_rps = &s->sh.long_term_rps;
389 RefPicList *rps = s->rps;
393 rps[0].nb_refs = rps[1].nb_refs = 0;
397 /* clear the reference flags on all frames except the current one */
398 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
399 HEVCFrame *frame = &s->DPB[i];
407 for (i = 0; i < NB_RPS_TYPE; i++)
410 /* add the short refs */
411 for (i = 0; i < short_rps->num_delta_pocs; i++) {
412 int poc = s->poc + short_rps->delta_poc[i];
415 if (!short_rps->used[i])
417 else if (i < short_rps->num_negative_pics)
422 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
427 /* add the long refs */
428 for (i = 0; i < long_rps->nb_refs; i++) {
429 int poc = long_rps->poc[i];
430 int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
432 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
437 /* release any frames that are now unused */
438 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
439 ff_hevc_unref_frame(s, &s->DPB[i], 0);
444 int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
446 int max_poc_lsb = 1 << s->sps->log2_max_poc_lsb;
447 int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
448 int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
451 if ((poc_lsb < prev_poc_lsb) && ((prev_poc_lsb - poc_lsb) >= max_poc_lsb / 2))
452 poc_msb = prev_poc_msb + max_poc_lsb;
453 else if ((poc_lsb > prev_poc_lsb) && ((poc_lsb - prev_poc_lsb) > (max_poc_lsb / 2)))
454 poc_msb = prev_poc_msb - max_poc_lsb;
456 poc_msb = prev_poc_msb;
458 // For BLA picture types, POCmsb is set to 0.
459 if (s->nal_unit_type == NAL_BLA_W_LP ||
460 s->nal_unit_type == NAL_BLA_W_RADL ||
461 s->nal_unit_type == NAL_BLA_N_LP)
464 return poc_msb + poc_lsb;
467 int ff_hevc_frame_nb_refs(HEVCContext *s)
471 const ShortTermRPS *rps = s->sh.short_term_rps;
472 LongTermRPS *long_rps = &s->sh.long_term_rps;
475 for (i = 0; i < rps->num_negative_pics; i++)
476 ret += !!rps->used[i];
477 for (; i < rps->num_delta_pocs; i++)
478 ret += !!rps->used[i];
482 for (i = 0; i < long_rps->nb_refs; i++)
483 ret += !!long_rps->used[i];