2 * HEVC Parameter Set encoding
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 static void write_ptl_layer(PutBitContext *pb, PTLCommon *ptl)
29 put_bits(pb, 2, ptl->profile_space);
30 put_bits(pb, 1, ptl->tier_flag);
31 put_bits(pb, 5, ptl->profile_idc);
32 for (i = 0; i < 32; i++)
33 put_bits(pb, 1, ptl->profile_compatibility_flag[i]);
34 put_bits(pb, 1, ptl->progressive_source_flag);
35 put_bits(pb, 1, ptl->interlaced_source_flag);
36 put_bits(pb, 1, ptl->non_packed_constraint_flag);
37 put_bits(pb, 1, ptl->frame_only_constraint_flag);
38 put_bits32(pb, 0); // reserved
39 put_bits(pb, 12, 0); // reserved
42 static void write_ptl(PutBitContext *pb, PTL *ptl, int max_num_sub_layers)
46 write_ptl_layer(pb, &ptl->general_ptl);
47 put_bits(pb, 8, ptl->general_ptl.level_idc);
49 for (i = 0; i < max_num_sub_layers - 1; i++) {
50 put_bits(pb, 1, ptl->sub_layer_profile_present_flag[i]);
51 put_bits(pb, 1, ptl->sub_layer_level_present_flag[i]);
54 if (max_num_sub_layers > 1)
55 for (i = max_num_sub_layers - 1; i < 8; i++)
56 put_bits(pb, 2, 0); // reserved
58 for (i = 0; i < max_num_sub_layers - 1; i++) {
59 if (ptl->sub_layer_profile_present_flag[i])
60 write_ptl_layer(pb, &ptl->sub_layer_ptl[i]);
61 if (ptl->sub_layer_level_present_flag[i])
62 put_bits(pb, 8, ptl->sub_layer_ptl[i].level_idc);
66 int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id,
67 uint8_t *buf, int buf_size)
72 init_put_bits(&pb, buf, buf_size);
74 put_bits(&pb, 2, 3); // reserved
75 put_bits(&pb, 6, vps->vps_max_layers - 1);
76 put_bits(&pb, 3, vps->vps_max_sub_layers - 1);
77 put_bits(&pb, 1, vps->vps_temporal_id_nesting_flag);
78 put_bits(&pb, 16, 0xffff); // reserved
80 write_ptl(&pb, &vps->ptl, vps->vps_max_sub_layers);
82 put_bits(&pb, 1, vps->vps_sub_layer_ordering_info_present_flag);
83 for (i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_layers - 1;
84 i < vps->vps_max_sub_layers; i++) {
85 set_ue_golomb(&pb, vps->vps_max_dec_pic_buffering[i] - 1);
86 set_ue_golomb(&pb, vps->vps_num_reorder_pics[i]);
87 set_ue_golomb(&pb, vps->vps_max_latency_increase[i] + 1);
90 put_bits(&pb, 6, vps->vps_max_layer_id);
91 set_ue_golomb(&pb, vps->vps_num_layer_sets - 1);
93 if (vps->vps_num_layer_sets > 1) {
94 avpriv_report_missing_feature(NULL, "Writing layer_id_included_flag");
95 return AVERROR_PATCHWELCOME;
98 put_bits(&pb, 1, vps->vps_timing_info_present_flag);
99 if (vps->vps_timing_info_present_flag) {
100 put_bits32(&pb, vps->vps_num_units_in_tick);
101 put_bits32(&pb, vps->vps_time_scale);
102 put_bits(&pb, 1, vps->vps_poc_proportional_to_timing_flag);
103 if (vps->vps_poc_proportional_to_timing_flag)
104 set_ue_golomb(&pb, vps->vps_num_ticks_poc_diff_one - 1);
106 if (vps->vps_num_hrd_parameters) {
107 avpriv_report_missing_feature(NULL, "Writing HRD parameters");
108 return AVERROR_PATCHWELCOME;
112 put_bits(&pb, 1, 0); // extension flag
114 put_bits(&pb, 1, 1); // stop bit
115 avpriv_align_put_bits(&pb);
117 return put_bits_count(&pb) / 8;