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cf9cd35aa9
Fixes: out of array write Fixes: 60798/clusterfuzz-testcase-minimized-ffmpeg_BSF_EVC_FRAME_MERGE_fuzzer-4633529766772736 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: James Almer <jamrial@gmail.com> Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
156 lines
5.5 KiB
C
156 lines
5.5 KiB
C
/*
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* EVC definitions and enums
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* Copyright (c) 2022 Dawid Kozinski <d.kozinski@samsung.com>
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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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#ifndef AVCODEC_EVC_H
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#define AVCODEC_EVC_H
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// The length field that indicates the length in bytes of the following NAL unit is configured to be of 4 bytes
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#define EVC_NALU_LENGTH_PREFIX_SIZE (4) /* byte */
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#define EVC_NALU_HEADER_SIZE (2) /* byte */
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/**
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* @see ISO_IEC_23094-1_2020, 7.4.2.2 NAL unit header semantic
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* Table 4 - NAL unit type codes and NAL unit type classes
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*/
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enum EVCNALUnitType {
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EVC_NOIDR_NUT = 0, /* Coded slice of a non-IDR picture */
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EVC_IDR_NUT = 1, /* Coded slice of an IDR picture */
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EVC_RSV_VCL_NUT02 = 2,
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EVC_RSV_VCL_NUT03 = 3,
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EVC_RSV_VCL_NUT04 = 4,
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EVC_RSV_VCL_NUT05 = 5,
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EVC_RSV_VCL_NUT06 = 6,
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EVC_RSV_VCL_NUT07 = 7,
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EVC_RSV_VCL_NUT08 = 8,
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EVC_RSV_VCL_NUT09 = 9,
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EVC_RSV_VCL_NUT10 = 10,
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EVC_RSV_VCL_NUT11 = 11,
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EVC_RSV_VCL_NUT12 = 12,
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EVC_RSV_VCL_NUT13 = 13,
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EVC_RSV_VCL_NUT14 = 14,
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EVC_RSV_VCL_NUT15 = 15,
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EVC_RSV_VCL_NUT16 = 16,
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EVC_RSV_VCL_NUT17 = 17,
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EVC_RSV_VCL_NUT18 = 18,
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EVC_RSV_VCL_NUT19 = 19,
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EVC_RSV_VCL_NUT20 = 20,
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EVC_RSV_VCL_NUT21 = 21,
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EVC_RSV_VCL_NUT22 = 22,
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EVC_RSV_VCL_NUT23 = 23,
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EVC_SPS_NUT = 24, /* Sequence parameter set */
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EVC_PPS_NUT = 25, /* Picture paremeter set */
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EVC_APS_NUT = 26, /* Adaptation parameter set */
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EVC_FD_NUT = 27, /* Filler data */
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EVC_SEI_NUT = 28, /* Supplemental enhancement information */
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EVC_RSV_NONVCL29 = 29,
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EVC_RSV_NONVCL30 = 30,
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EVC_RSV_NONVCL31 = 31,
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EVC_RSV_NONVCL32 = 32,
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EVC_RSV_NONVCL33 = 33,
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EVC_RSV_NONVCL34 = 34,
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EVC_RSV_NONVCL35 = 35,
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EVC_RSV_NONVCL36 = 36,
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EVC_RSV_NONVCL37 = 37,
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EVC_RSV_NONVCL38 = 38,
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EVC_RSV_NONVCL39 = 39,
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EVC_RSV_NONVCL40 = 40,
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EVC_RSV_NONVCL41 = 41,
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EVC_RSV_NONVCL42 = 42,
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EVC_RSV_NONVCL43 = 43,
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EVC_RSV_NONVCL44 = 44,
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EVC_RSV_NONVCL45 = 45,
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EVC_RSV_NONVCL46 = 46,
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EVC_RSV_NONVCL47 = 47,
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EVC_RSV_NONVCL48 = 48,
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EVC_RSV_NONVCL49 = 49,
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EVC_RSV_NONVCL50 = 50,
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EVC_RSV_NONVCL51 = 51,
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EVC_RSV_NONVCL52 = 52,
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EVC_RSV_NONVCL53 = 53,
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EVC_RSV_NONVCL54 = 54,
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EVC_RSV_NONVCL55 = 55,
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EVC_UNSPEC_NUT56 = 56,
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EVC_UNSPEC_NUT57 = 57,
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EVC_UNSPEC_NUT58 = 58,
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EVC_UNSPEC_NUT59 = 59,
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EVC_UNSPEC_NUT60 = 60,
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EVC_UNSPEC_NUT61 = 61,
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EVC_UNSPEC_NUT62 = 62
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};
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// slice type
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// @see ISO_IEC_23094-1_2020 7.4.5 Slice header semantics
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//
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enum EVCSliceType {
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EVC_SLICE_TYPE_B = 0,
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EVC_SLICE_TYPE_P = 1,
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EVC_SLICE_TYPE_I = 2
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};
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enum {
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// 7.4.3.2: aps_video_parameter_set_id is u(4).
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EVC_MAX_APS_COUNT = 32,
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// 7.4.3.1: sps_seq_parameter_set_id is in [0, 15].
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EVC_MAX_SPS_COUNT = 16,
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// 7.4.3.2: pps_pic_parameter_set_id is in [0, 63].
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EVC_MAX_PPS_COUNT = 64,
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// 7.4.5: slice header slice_pic_parameter_set_id in [0, 63]
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EVC_MAX_SH_COUNT = 64,
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// E.3.2: cpb_cnt_minus1[i] is in [0, 31].
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EVC_MAX_CPB_CNT = 32,
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// A.4.1: in table A.1 the highest level allows a MaxLumaPs of 35 651 584.
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EVC_MAX_LUMA_PS = 35651584,
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EVC_MAX_NUM_REF_PICS = 21,
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EVC_MAX_NUM_RPLS = 64,
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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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EVC_MAX_WIDTH = 16888,
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EVC_MAX_HEIGHT = 16888,
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// A.4.1: table A.1 allows at most 22 tile rows for any level.
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EVC_MAX_TILE_ROWS = 22,
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// A.4.1: table A.1 allows at most 20 tile columns for any level.
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EVC_MAX_TILE_COLUMNS = 20,
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// A.4.1: table A.1 allows at most 600 slice segments for any level.
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EVC_MAX_SLICE_SEGMENTS = 600,
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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 = EVC_MAX_TILE_COLUMNS * 135,
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};
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#endif // AVCODEC_EVC_H
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