mirror of
https://github.com/FFmpeg/FFmpeg.git
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b88da98b34
Add comments to describe the sources of the constraint values expressed here, and add some more related values which will be used in following patches. Fix the incorrect values for SPS and PPS count (they are not the same as those used for H.264), and remove HEVC_MAX_CU_SIZE because it is not used anywhere.
134 lines
4.4 KiB
C
134 lines
4.4 KiB
C
/*
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* HEVC shared code
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#ifndef AVCODEC_HEVC_H
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#define AVCODEC_HEVC_H
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/**
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* Table 7-3: NAL unit type codes
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*/
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enum HEVCNALUnitType {
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HEVC_NAL_TRAIL_N = 0,
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HEVC_NAL_TRAIL_R = 1,
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HEVC_NAL_TSA_N = 2,
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HEVC_NAL_TSA_R = 3,
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HEVC_NAL_STSA_N = 4,
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HEVC_NAL_STSA_R = 5,
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HEVC_NAL_RADL_N = 6,
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HEVC_NAL_RADL_R = 7,
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HEVC_NAL_RASL_N = 8,
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HEVC_NAL_RASL_R = 9,
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HEVC_NAL_VCL_N10 = 10,
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HEVC_NAL_VCL_R11 = 11,
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HEVC_NAL_VCL_N12 = 12,
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HEVC_NAL_VCL_R13 = 13,
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HEVC_NAL_VCL_N14 = 14,
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HEVC_NAL_VCL_R15 = 15,
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HEVC_NAL_BLA_W_LP = 16,
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HEVC_NAL_BLA_W_RADL = 17,
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HEVC_NAL_BLA_N_LP = 18,
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HEVC_NAL_IDR_W_RADL = 19,
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HEVC_NAL_IDR_N_LP = 20,
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HEVC_NAL_CRA_NUT = 21,
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HEVC_NAL_IRAP_VCL22 = 22,
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HEVC_NAL_IRAP_VCL23 = 23,
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HEVC_NAL_RSV_VCL24 = 24,
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HEVC_NAL_RSV_VCL25 = 25,
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HEVC_NAL_RSV_VCL26 = 26,
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HEVC_NAL_RSV_VCL27 = 27,
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HEVC_NAL_RSV_VCL28 = 28,
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HEVC_NAL_RSV_VCL29 = 29,
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HEVC_NAL_RSV_VCL30 = 30,
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HEVC_NAL_RSV_VCL31 = 31,
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HEVC_NAL_VPS = 32,
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HEVC_NAL_SPS = 33,
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HEVC_NAL_PPS = 34,
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HEVC_NAL_AUD = 35,
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HEVC_NAL_EOS_NUT = 36,
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HEVC_NAL_EOB_NUT = 37,
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HEVC_NAL_FD_NUT = 38,
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HEVC_NAL_SEI_PREFIX = 39,
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HEVC_NAL_SEI_SUFFIX = 40,
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};
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enum HEVCSliceType {
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HEVC_SLICE_B = 0,
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HEVC_SLICE_P = 1,
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HEVC_SLICE_I = 2,
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};
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enum {
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// 7.4.3.1: vps_max_layers_minus1 is in [0, 62].
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HEVC_MAX_LAYERS = 63,
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// 7.4.3.1: vps_max_sub_layers_minus1 is in [0, 6].
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HEVC_MAX_SUB_LAYERS = 7,
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// 7.4.3.1: vps_num_layer_sets_minus1 is in [0, 1023].
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HEVC_MAX_LAYER_SETS = 1024,
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// 7.4.2.1: vps_video_parameter_set_id is u(4).
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HEVC_MAX_VPS_COUNT = 16,
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// 7.4.3.2.1: sps_seq_parameter_set_id is in [0, 15].
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HEVC_MAX_SPS_COUNT = 16,
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// 7.4.3.3.1: pps_pic_parameter_set_id is in [0, 63].
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HEVC_MAX_PPS_COUNT = 64,
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// A.4.2: MaxDpbSize is bounded above by 16.
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HEVC_MAX_DPB_SIZE = 16,
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// 7.4.3.1: vps_max_dec_pic_buffering_minus1[i] is in [0, MaxDpbSize - 1].
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HEVC_MAX_REFS = HEVC_MAX_DPB_SIZE,
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// 7.4.3.2.1: num_short_term_ref_pic_sets is in [0, 64].
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HEVC_MAX_SHORT_TERM_REF_PIC_SETS = 64,
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// 7.4.3.2.1: num_long_term_ref_pics_sps is in [0, 32].
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HEVC_MAX_LONG_TERM_REF_PICS = 32,
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// A.3: all profiles require that CtbLog2SizeY is in [4, 6].
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HEVC_MIN_LOG2_CTB_SIZE = 4,
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HEVC_MAX_LOG2_CTB_SIZE = 6,
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// E.3.2: cpb_cnt_minus1[i] is in [0, 31].
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HEVC_MAX_CPB_CNT = 32,
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// A.4.1: in table A.6 the highest level allows a MaxLumaPs of 35 651 584.
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HEVC_MAX_LUMA_PS = 35651584,
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// A.4.1: pic_width_in_luma_samples and pic_height_in_luma_samples are
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// constrained to be not greater than sqrt(MaxLumaPs * 8). Hence height/
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// width are bounded above by sqrt(8 * 35651584) = 16888.2 samples.
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HEVC_MAX_WIDTH = 16888,
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HEVC_MAX_HEIGHT = 16888,
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// A.4.1: table A.6 allows at most 22 tile rows for any level.
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HEVC_MAX_TILE_ROWS = 22,
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// A.4.1: table A.6 allows at most 20 tile columns for any level.
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HEVC_MAX_TILE_COLUMNS = 20,
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// 7.4.7.1: in the worst case (tiles_enabled_flag and
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// entropy_coding_sync_enabled_flag are both set), entry points can be
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// placed at the beginning of every Ctb row in every tile, giving an
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// upper bound of (num_tile_columns_minus1 + 1) * PicHeightInCtbsY - 1.
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// Only a stream with very high resolution and perverse parameters could
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// get near that, though, so set a lower limit here with the maximum
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// possible value for 4K video (at most 135 16x16 Ctb rows).
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HEVC_MAX_ENTRY_POINT_OFFSETS = HEVC_MAX_TILE_COLUMNS * 135,
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};
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#endif /* AVCODEC_HEVC_H */
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