blob: 4c71cf41ca30431c04adebc44e65e86724a13ebd
| 1 | /* |
| 2 | * HEVC Parameter Set encoding |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 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. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 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. |
| 15 | * |
| 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 |
| 19 | */ |
| 20 | |
| 21 | #include "golomb.h" |
| 22 | #include "hevc_ps.h" |
| 23 | #include "put_bits.h" |
| 24 | |
| 25 | static void write_ptl_layer(PutBitContext *pb, PTLCommon *ptl) |
| 26 | { |
| 27 | int i; |
| 28 | |
| 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 |
| 40 | } |
| 41 | |
| 42 | static void write_ptl(PutBitContext *pb, PTL *ptl, int max_num_sub_layers) |
| 43 | { |
| 44 | int i; |
| 45 | |
| 46 | write_ptl_layer(pb, &ptl->general_ptl); |
| 47 | put_bits(pb, 8, ptl->general_ptl.level_idc); |
| 48 | |
| 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]); |
| 52 | } |
| 53 | |
| 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 |
| 57 | |
| 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); |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id, |
| 67 | uint8_t *buf, int buf_size) |
| 68 | { |
| 69 | PutBitContext pb; |
| 70 | int i; |
| 71 | |
| 72 | init_put_bits(&pb, buf, buf_size); |
| 73 | put_bits(&pb, 4, id); |
| 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 |
| 79 | |
| 80 | write_ptl(&pb, &vps->ptl, vps->vps_max_sub_layers); |
| 81 | |
| 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); |
| 88 | } |
| 89 | |
| 90 | put_bits(&pb, 6, vps->vps_max_layer_id); |
| 91 | set_ue_golomb(&pb, vps->vps_num_layer_sets - 1); |
| 92 | |
| 93 | if (vps->vps_num_layer_sets > 1) { |
| 94 | avpriv_report_missing_feature(NULL, "Writing layer_id_included_flag"); |
| 95 | return AVERROR_PATCHWELCOME; |
| 96 | } |
| 97 | |
| 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); |
| 105 | |
| 106 | if (vps->vps_num_hrd_parameters) { |
| 107 | avpriv_report_missing_feature(NULL, "Writing HRD parameters"); |
| 108 | return AVERROR_PATCHWELCOME; |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | put_bits(&pb, 1, 0); // extension flag |
| 113 | |
| 114 | put_bits(&pb, 1, 1); // stop bit |
| 115 | avpriv_align_put_bits(&pb); |
| 116 | |
| 117 | return put_bits_count(&pb) / 8; |
| 118 | } |
| 119 |