mirror of
https://github.com/FFmpeg/FFmpeg.git
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4a5810b659
* commit 'f6e2f8a9ffda2247bffba991450990d075ea68e3': hevcdec: move parameter set parsing into a separate header Merged-by: James Almer <jamrial@gmail.com>
117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/*
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* HEVC Parameter Set encoding
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "golomb.h"
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#include "hevc_ps.h"
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#include "put_bits.h"
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static void write_ptl_layer(PutBitContext *pb, PTLCommon *ptl)
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{
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int i;
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put_bits(pb, 2, ptl->profile_space);
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put_bits(pb, 1, ptl->tier_flag);
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put_bits(pb, 5, ptl->profile_idc);
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for (i = 0; i < 32; i++)
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put_bits(pb, 1, ptl->profile_compatibility_flag[i]);
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put_bits(pb, 1, ptl->progressive_source_flag);
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put_bits(pb, 1, ptl->interlaced_source_flag);
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put_bits(pb, 1, ptl->non_packed_constraint_flag);
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put_bits(pb, 1, ptl->frame_only_constraint_flag);
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put_bits32(pb, 0); // reserved
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put_bits(pb, 12, 0); // reserved
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}
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static void write_ptl(PutBitContext *pb, PTL *ptl, int max_num_sub_layers)
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{
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int i;
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write_ptl_layer(pb, &ptl->general_ptl);
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put_bits(pb, 8, ptl->general_ptl.level_idc);
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for (i = 0; i < max_num_sub_layers - 1; i++) {
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put_bits(pb, 1, ptl->sub_layer_profile_present_flag[i]);
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put_bits(pb, 1, ptl->sub_layer_level_present_flag[i]);
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}
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if (max_num_sub_layers > 1)
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for (i = max_num_sub_layers - 1; i < 8; i++)
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put_bits(pb, 2, 0); // reserved
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for (i = 0; i < max_num_sub_layers - 1; i++) {
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if (ptl->sub_layer_profile_present_flag[i])
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write_ptl_layer(pb, &ptl->sub_layer_ptl[i]);
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if (ptl->sub_layer_level_present_flag[i])
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put_bits(pb, 8, ptl->sub_layer_ptl[i].level_idc);
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}
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}
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int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id,
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uint8_t *buf, int buf_size)
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{
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PutBitContext pb;
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int i;
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init_put_bits(&pb, buf, buf_size);
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put_bits(&pb, 4, id);
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put_bits(&pb, 2, 3); // reserved
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put_bits(&pb, 6, vps->vps_max_layers - 1);
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put_bits(&pb, 3, vps->vps_max_sub_layers - 1);
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put_bits(&pb, 1, vps->vps_temporal_id_nesting_flag);
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put_bits(&pb, 16, 0xffff); // reserved
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write_ptl(&pb, &vps->ptl, vps->vps_max_sub_layers);
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put_bits(&pb, 1, vps->vps_sub_layer_ordering_info_present_flag);
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for (i = vps->vps_sub_layer_ordering_info_present_flag ? 0 : vps->vps_max_layers - 1;
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i < vps->vps_max_sub_layers; i++) {
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set_ue_golomb(&pb, vps->vps_max_dec_pic_buffering[i] - 1);
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set_ue_golomb(&pb, vps->vps_num_reorder_pics[i]);
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set_ue_golomb(&pb, vps->vps_max_latency_increase[i] + 1);
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}
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put_bits(&pb, 6, vps->vps_max_layer_id);
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set_ue_golomb(&pb, vps->vps_num_layer_sets - 1);
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// writing layer_id_included_flag not supported
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if (vps->vps_num_layer_sets > 1)
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return AVERROR_PATCHWELCOME;
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put_bits(&pb, 1, vps->vps_timing_info_present_flag);
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if (vps->vps_timing_info_present_flag) {
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put_bits32(&pb, vps->vps_num_units_in_tick);
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put_bits32(&pb, vps->vps_time_scale);
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put_bits(&pb, 1, vps->vps_poc_proportional_to_timing_flag);
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if (vps->vps_poc_proportional_to_timing_flag)
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set_ue_golomb(&pb, vps->vps_num_ticks_poc_diff_one - 1);
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// writing HRD parameters not supported
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if (vps->vps_num_hrd_parameters)
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return AVERROR_PATCHWELCOME;
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}
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put_bits(&pb, 1, 0); // extension flag
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put_bits(&pb, 1, 1); // stop bit
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avpriv_align_put_bits(&pb);
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return put_bits_count(&pb) / 8;
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}
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