4 * Copyright (C) 2012 - 2013 Guillaume Martres
5 * Copyright (C) 2012 - 2013 Gildas Cocherel
7 * This file is part of Libav.
9 * Libav 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 * Libav 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 Libav; 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->ps.sps->log2_ctb_size;
59 int y_cb = y0 >> s->ps.sps->log2_ctb_size;
60 int pic_width_cb = (s->ps.sps->width + (1 << s->ps.sps->log2_ctb_size) - 1) >>
61 s->ps.sps->log2_ctb_size;
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->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 if (s->avctx->hwaccel) {
113 const AVHWAccel *hwaccel = s->avctx->hwaccel;
114 av_assert0(!frame->hwaccel_picture_private);
115 if (hwaccel->frame_priv_data_size) {
116 frame->hwaccel_priv_buf = av_buffer_allocz(hwaccel->frame_priv_data_size);
117 if (!frame->hwaccel_priv_buf)
119 frame->hwaccel_picture_private = frame->hwaccel_priv_buf->data;
126 ff_hevc_unref_frame(s, frame, ~0);
129 av_log(s->avctx, AV_LOG_ERROR, "Error allocating frame, DPB full.\n");
133 int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc)
138 /* check that this POC doesn't already exist */
139 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
140 HEVCFrame *frame = &s->DPB[i];
142 if (frame->frame->buf[0] && frame->sequence == s->seq_decode &&
144 av_log(s->avctx, AV_LOG_ERROR, "Duplicate POC in a sequence: %d.\n",
146 return AVERROR_INVALIDDATA;
150 ref = alloc_frame(s);
152 return AVERROR(ENOMEM);
157 if (s->sh.pic_output_flag)
158 ref->flags = HEVC_FRAME_FLAG_OUTPUT | HEVC_FRAME_FLAG_SHORT_REF;
160 ref->flags = HEVC_FRAME_FLAG_SHORT_REF;
163 ref->sequence = s->seq_decode;
164 ref->window = s->ps.sps->output_window;
169 int ff_hevc_output_frame(HEVCContext *s, AVFrame *out, int flush)
173 int min_poc = INT_MAX;
176 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
177 HEVCFrame *frame = &s->DPB[i];
178 if ((frame->flags & HEVC_FRAME_FLAG_OUTPUT) &&
179 frame->sequence == s->seq_output) {
181 if (frame->poc < min_poc) {
182 min_poc = frame->poc;
188 /* wait for more frames before output */
189 if (!flush && s->seq_output == s->seq_decode && s->ps.sps &&
190 nb_output <= s->ps.sps->temporal_layer[s->ps.sps->max_sub_layers - 1].num_reorder_pics)
194 HEVCFrame *frame = &s->DPB[min_idx];
195 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->frame->format);
201 pixel_shift = desc->comp[0].depth_minus1 > 7;
203 ret = av_frame_ref(out, frame->frame);
204 ff_hevc_unref_frame(s, frame, HEVC_FRAME_FLAG_OUTPUT);
208 for (i = 0; i < 3; i++) {
209 int hshift = (i > 0) ? desc->log2_chroma_w : 0;
210 int vshift = (i > 0) ? desc->log2_chroma_h : 0;
211 int off = ((frame->window.left_offset >> hshift) << pixel_shift) +
212 (frame->window.top_offset >> vshift) * out->linesize[i];
215 av_log(s->avctx, AV_LOG_DEBUG,
216 "Output frame with POC %d.\n", frame->poc);
220 if (s->seq_output != s->seq_decode)
221 s->seq_output = (s->seq_output + 1) & 0xff;
229 static int init_slice_rpl(HEVCContext *s)
231 HEVCFrame *frame = s->ref;
232 int ctb_count = frame->ctb_count;
233 int ctb_addr_ts = s->ps.pps->ctb_addr_rs_to_ts[s->sh.slice_segment_addr];
236 if (s->slice_idx >= frame->rpl_buf->size / sizeof(RefPicListTab))
237 return AVERROR_INVALIDDATA;
239 for (i = ctb_addr_ts; i < ctb_count; i++)
240 frame->rpl_tab[i] = (RefPicListTab *)frame->rpl_buf->data + s->slice_idx;
242 frame->refPicList = (RefPicList *)frame->rpl_tab[ctb_addr_ts];
247 int ff_hevc_slice_rpl(HEVCContext *s)
249 SliceHeader *sh = &s->sh;
251 uint8_t nb_list = sh->slice_type == B_SLICE ? 2 : 1;
255 ret = init_slice_rpl(s);
259 if (!(s->rps[ST_CURR_BEF].nb_refs + s->rps[ST_CURR_AFT].nb_refs +
260 s->rps[LT_CURR].nb_refs)) {
261 av_log(s->avctx, AV_LOG_ERROR, "Zero refs in the frame RPS.\n");
262 return AVERROR_INVALIDDATA;
265 for (list_idx = 0; list_idx < nb_list; list_idx++) {
266 RefPicList rpl_tmp = { { 0 } };
267 RefPicList *rpl = &s->ref->refPicList[list_idx];
269 /* The order of the elements is
270 * ST_CURR_BEF - ST_CURR_AFT - LT_CURR for the L0 and
271 * ST_CURR_AFT - ST_CURR_BEF - LT_CURR for the L1 */
272 int cand_lists[3] = { list_idx ? ST_CURR_AFT : ST_CURR_BEF,
273 list_idx ? ST_CURR_BEF : ST_CURR_AFT,
276 /* concatenate the candidate lists for the current frame */
277 while (rpl_tmp.nb_refs < sh->nb_refs[list_idx]) {
278 for (i = 0; i < FF_ARRAY_ELEMS(cand_lists); i++) {
279 RefPicList *rps = &s->rps[cand_lists[i]];
280 for (j = 0; j < rps->nb_refs && rpl_tmp.nb_refs < MAX_REFS; j++) {
281 rpl_tmp.list[rpl_tmp.nb_refs] = rps->list[j];
282 rpl_tmp.ref[rpl_tmp.nb_refs] = rps->ref[j];
283 rpl_tmp.isLongTerm[rpl_tmp.nb_refs] = i == 2;
289 /* reorder the references if necessary */
290 if (sh->rpl_modification_flag[list_idx]) {
291 for (i = 0; i < sh->nb_refs[list_idx]; i++) {
292 int idx = sh->list_entry_lx[list_idx][i];
294 if (idx >= rpl_tmp.nb_refs) {
295 av_log(s->avctx, AV_LOG_ERROR, "Invalid reference index.\n");
296 return AVERROR_INVALIDDATA;
299 rpl->list[i] = rpl_tmp.list[idx];
300 rpl->ref[i] = rpl_tmp.ref[idx];
301 rpl->isLongTerm[i] = rpl_tmp.isLongTerm[idx];
305 memcpy(rpl, &rpl_tmp, sizeof(*rpl));
306 rpl->nb_refs = FFMIN(rpl->nb_refs, sh->nb_refs[list_idx]);
309 if (sh->collocated_list == list_idx &&
310 sh->collocated_ref_idx < rpl->nb_refs)
311 s->ref->collocated_ref = rpl->ref[sh->collocated_ref_idx];
317 static HEVCFrame *find_ref_idx(HEVCContext *s, int poc)
320 int LtMask = (1 << s->ps.sps->log2_max_poc_lsb) - 1;
322 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
323 HEVCFrame *ref = &s->DPB[i];
324 if (ref->frame->buf[0] && (ref->sequence == s->seq_decode)) {
325 if ((ref->poc & LtMask) == poc)
330 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
331 HEVCFrame *ref = &s->DPB[i];
332 if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
333 if (ref->poc == poc || (ref->poc & LtMask) == poc)
338 av_log(s->avctx, AV_LOG_ERROR,
339 "Could not find ref with POC %d\n", poc);
343 static void mark_ref(HEVCFrame *frame, int flag)
345 frame->flags &= ~(HEVC_FRAME_FLAG_LONG_REF | HEVC_FRAME_FLAG_SHORT_REF);
346 frame->flags |= flag;
349 static HEVCFrame *generate_missing_ref(HEVCContext *s, int poc)
354 frame = alloc_frame(s);
358 if (!s->avctx->hwaccel) {
359 if (!s->ps.sps->pixel_shift) {
360 for (i = 0; frame->frame->buf[i]; i++)
361 memset(frame->frame->buf[i]->data, 1 << (s->ps.sps->bit_depth - 1),
362 frame->frame->buf[i]->size);
364 for (i = 0; frame->frame->data[i]; i++)
365 for (y = 0; y < (s->ps.sps->height >> s->ps.sps->vshift[i]); y++)
366 for (x = 0; x < (s->ps.sps->width >> s->ps.sps->hshift[i]); x++) {
367 AV_WN16(frame->frame->data[i] + y * frame->frame->linesize[i] + 2 * x,
368 1 << (s->ps.sps->bit_depth - 1));
374 frame->sequence = s->seq_decode;
377 ff_thread_report_progress(&frame->tf, INT_MAX, 0);
382 /* add a reference with the given poc to the list and mark it as used in DPB */
383 static int add_candidate_ref(HEVCContext *s, RefPicList *list,
384 int poc, int ref_flag)
386 HEVCFrame *ref = find_ref_idx(s, poc);
389 return AVERROR_INVALIDDATA;
392 ref = generate_missing_ref(s, poc);
394 return AVERROR(ENOMEM);
397 list->list[list->nb_refs] = ref->poc;
398 list->ref[list->nb_refs] = ref;
401 mark_ref(ref, ref_flag);
405 int ff_hevc_frame_rps(HEVCContext *s)
407 const ShortTermRPS *short_rps = s->sh.short_term_rps;
408 const LongTermRPS *long_rps = &s->sh.long_term_rps;
409 RefPicList *rps = s->rps;
413 rps[0].nb_refs = rps[1].nb_refs = 0;
417 /* clear the reference flags on all frames except the current one */
418 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
419 HEVCFrame *frame = &s->DPB[i];
427 for (i = 0; i < NB_RPS_TYPE; i++)
430 /* add the short refs */
431 for (i = 0; i < short_rps->num_delta_pocs; i++) {
432 int poc = s->poc + short_rps->delta_poc[i];
435 if (!short_rps->used[i])
437 else if (i < short_rps->num_negative_pics)
442 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_SHORT_REF);
447 /* add the long refs */
448 for (i = 0; i < long_rps->nb_refs; i++) {
449 int poc = long_rps->poc[i];
450 int list = long_rps->used[i] ? LT_CURR : LT_FOLL;
452 ret = add_candidate_ref(s, &rps[list], poc, HEVC_FRAME_FLAG_LONG_REF);
458 /* release any frames that are now unused */
459 for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++)
460 ff_hevc_unref_frame(s, &s->DPB[i], 0);
465 int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb)
467 int max_poc_lsb = 1 << s->ps.sps->log2_max_poc_lsb;
468 int prev_poc_lsb = s->pocTid0 % max_poc_lsb;
469 int prev_poc_msb = s->pocTid0 - prev_poc_lsb;
472 if (poc_lsb < prev_poc_lsb && prev_poc_lsb - poc_lsb >= max_poc_lsb / 2)
473 poc_msb = prev_poc_msb + max_poc_lsb;
474 else if (poc_lsb > prev_poc_lsb && poc_lsb - prev_poc_lsb > max_poc_lsb / 2)
475 poc_msb = prev_poc_msb - max_poc_lsb;
477 poc_msb = prev_poc_msb;
479 // For BLA picture types, POCmsb is set to 0.
480 if (s->nal_unit_type == NAL_BLA_W_LP ||
481 s->nal_unit_type == NAL_BLA_W_RADL ||
482 s->nal_unit_type == NAL_BLA_N_LP)
485 return poc_msb + poc_lsb;
488 int ff_hevc_frame_nb_refs(HEVCContext *s)
492 const ShortTermRPS *rps = s->sh.short_term_rps;
493 LongTermRPS *long_rps = &s->sh.long_term_rps;
496 for (i = 0; i < rps->num_negative_pics; i++)
497 ret += !!rps->used[i];
498 for (; i < rps->num_delta_pocs; i++)
499 ret += !!rps->used[i];
503 for (i = 0; i < long_rps->nb_refs; i++)
504 ret += !!long_rps->used[i];