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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * H.26L/H.264/AVC/JVT/14496-10/... parameter set decoding |
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| 3 | * Copyright (c) 2003 Michael Niedermayer |
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| 4 | * |
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| 5 | * This file is part of FFmpeg. |
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| 6 | * |
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| 7 | * FFmpeg is free software; you can redistribute it and/or |
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| 8 | * modify it under the terms of the GNU Lesser General Public |
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| 9 | * License as published by the Free Software Foundation; either |
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| 10 | * version 2.1 of the License, or (at your option) any later version. |
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| 11 | * |
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| 12 | * FFmpeg is distributed in the hope that it will be useful, |
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | * Lesser General Public License for more details. |
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| 16 | * |
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| 17 | * You should have received a copy of the GNU Lesser General Public |
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| 18 | * License along with FFmpeg; if not, write to the Free Software |
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| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 20 | */ |
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| 21 | |||
| 22 | /** |
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| 23 | * @file |
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| 24 | * H.264 / AVC / MPEG4 part10 parameter set decoding. |
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| 25 | * @author Michael Niedermayer |
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| 26 | */ |
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| 27 | |||
| 28 | #include "libavutil/imgutils.h" |
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| 29 | #include "internal.h" |
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| 30 | #include "avcodec.h" |
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| 31 | #include "h264.h" |
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| 32 | #include "h264data.h" //FIXME FIXME FIXME (just for zigzag_scan) |
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| 33 | #include "golomb.h" |
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| 34 | |||
| 35 | #define MAX_LOG2_MAX_FRAME_NUM (12 + 4) |
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| 36 | #define MIN_LOG2_MAX_FRAME_NUM 4 |
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| 37 | |||
| 38 | static const AVRational pixel_aspect[17] = { |
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| 39 | { 0, 1 }, |
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| 40 | { 1, 1 }, |
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| 41 | { 12, 11 }, |
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| 42 | { 10, 11 }, |
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| 43 | { 16, 11 }, |
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| 44 | { 40, 33 }, |
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| 45 | { 24, 11 }, |
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| 46 | { 20, 11 }, |
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| 47 | { 32, 11 }, |
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| 48 | { 80, 33 }, |
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| 49 | { 18, 11 }, |
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| 50 | { 15, 11 }, |
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| 51 | { 64, 33 }, |
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| 52 | { 160, 99 }, |
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| 53 | { 4, 3 }, |
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| 54 | { 3, 2 }, |
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| 55 | { 2, 1 }, |
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| 56 | }; |
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| 57 | |||
| 58 | #define QP(qP, depth) ((qP) + 6 * ((depth) - 8)) |
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| 59 | |||
| 60 | #define CHROMA_QP_TABLE_END(d) \ |
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| 61 | QP(0, d), QP(1, d), QP(2, d), QP(3, d), QP(4, d), QP(5, d), \ |
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| 62 | QP(6, d), QP(7, d), QP(8, d), QP(9, d), QP(10, d), QP(11, d), \ |
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| 63 | QP(12, d), QP(13, d), QP(14, d), QP(15, d), QP(16, d), QP(17, d), \ |
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| 64 | QP(18, d), QP(19, d), QP(20, d), QP(21, d), QP(22, d), QP(23, d), \ |
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| 65 | QP(24, d), QP(25, d), QP(26, d), QP(27, d), QP(28, d), QP(29, d), \ |
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| 66 | QP(29, d), QP(30, d), QP(31, d), QP(32, d), QP(32, d), QP(33, d), \ |
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| 67 | QP(34, d), QP(34, d), QP(35, d), QP(35, d), QP(36, d), QP(36, d), \ |
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| 68 | QP(37, d), QP(37, d), QP(37, d), QP(38, d), QP(38, d), QP(38, d), \ |
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| 69 | QP(39, d), QP(39, d), QP(39, d), QP(39, d) |
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| 70 | |||
| 71 | const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM + 1] = { |
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| 72 | { CHROMA_QP_TABLE_END(8) }, |
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| 73 | { 0, 1, 2, 3, 4, 5, |
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| 74 | CHROMA_QP_TABLE_END(9) }, |
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| 75 | { 0, 1, 2, 3, 4, 5, |
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| 76 | 6, 7, 8, 9, 10, 11, |
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| 77 | CHROMA_QP_TABLE_END(10) }, |
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| 78 | { 0, 1, 2, 3, 4, 5, |
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| 79 | 6, 7, 8, 9, 10, 11, |
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| 80 | 12,13,14,15, 16, 17, |
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| 81 | CHROMA_QP_TABLE_END(11) }, |
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| 82 | { 0, 1, 2, 3, 4, 5, |
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| 83 | 6, 7, 8, 9, 10, 11, |
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| 84 | 12,13,14,15, 16, 17, |
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| 85 | 18,19,20,21, 22, 23, |
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| 86 | CHROMA_QP_TABLE_END(12) }, |
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| 87 | { 0, 1, 2, 3, 4, 5, |
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| 88 | 6, 7, 8, 9, 10, 11, |
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| 89 | 12,13,14,15, 16, 17, |
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| 90 | 18,19,20,21, 22, 23, |
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| 91 | 24,25,26,27, 28, 29, |
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| 92 | CHROMA_QP_TABLE_END(13) }, |
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| 93 | { 0, 1, 2, 3, 4, 5, |
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| 94 | 6, 7, 8, 9, 10, 11, |
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| 95 | 12,13,14,15, 16, 17, |
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| 96 | 18,19,20,21, 22, 23, |
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| 97 | 24,25,26,27, 28, 29, |
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| 98 | 30,31,32,33, 34, 35, |
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| 99 | CHROMA_QP_TABLE_END(14) }, |
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| 100 | }; |
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| 101 | |||
| 102 | static const uint8_t default_scaling4[2][16] = { |
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| 103 | { 6, 13, 20, 28, 13, 20, 28, 32, |
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| 104 | 20, 28, 32, 37, 28, 32, 37, 42 }, |
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| 105 | { 10, 14, 20, 24, 14, 20, 24, 27, |
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| 106 | 20, 24, 27, 30, 24, 27, 30, 34 } |
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| 107 | }; |
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| 108 | |||
| 109 | static const uint8_t default_scaling8[2][64] = { |
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| 110 | { 6, 10, 13, 16, 18, 23, 25, 27, |
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| 111 | 10, 11, 16, 18, 23, 25, 27, 29, |
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| 112 | 13, 16, 18, 23, 25, 27, 29, 31, |
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| 113 | 16, 18, 23, 25, 27, 29, 31, 33, |
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| 114 | 18, 23, 25, 27, 29, 31, 33, 36, |
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| 115 | 23, 25, 27, 29, 31, 33, 36, 38, |
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| 116 | 25, 27, 29, 31, 33, 36, 38, 40, |
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| 117 | 27, 29, 31, 33, 36, 38, 40, 42 }, |
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| 118 | { 9, 13, 15, 17, 19, 21, 22, 24, |
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| 119 | 13, 13, 17, 19, 21, 22, 24, 25, |
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| 120 | 15, 17, 19, 21, 22, 24, 25, 27, |
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| 121 | 17, 19, 21, 22, 24, 25, 27, 28, |
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| 122 | 19, 21, 22, 24, 25, 27, 28, 30, |
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| 123 | 21, 22, 24, 25, 27, 28, 30, 32, |
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| 124 | 22, 24, 25, 27, 28, 30, 32, 33, |
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| 125 | 24, 25, 27, 28, 30, 32, 33, 35 } |
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| 126 | }; |
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| 127 | |||
| 128 | static inline int decode_hrd_parameters(H264Context *h, SPS *sps) |
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| 129 | { |
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| 130 | int cpb_count, i; |
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| 131 | cpb_count = get_ue_golomb_31(&h->gb) + 1; |
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| 132 | |||
| 133 | if (cpb_count > 32U) { |
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| 134 | av_log(h->avctx, AV_LOG_ERROR, "cpb_count %d invalid\n", cpb_count); |
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| 135 | return AVERROR_INVALIDDATA; |
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| 136 | } |
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| 137 | |||
| 138 | get_bits(&h->gb, 4); /* bit_rate_scale */ |
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| 139 | get_bits(&h->gb, 4); /* cpb_size_scale */ |
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| 140 | for (i = 0; i < cpb_count; i++) { |
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| 141 | get_ue_golomb_long(&h->gb); /* bit_rate_value_minus1 */ |
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| 142 | get_ue_golomb_long(&h->gb); /* cpb_size_value_minus1 */ |
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| 143 | get_bits1(&h->gb); /* cbr_flag */ |
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| 144 | } |
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| 145 | sps->initial_cpb_removal_delay_length = get_bits(&h->gb, 5) + 1; |
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| 146 | sps->cpb_removal_delay_length = get_bits(&h->gb, 5) + 1; |
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| 147 | sps->dpb_output_delay_length = get_bits(&h->gb, 5) + 1; |
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| 148 | sps->time_offset_length = get_bits(&h->gb, 5); |
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| 149 | sps->cpb_cnt = cpb_count; |
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| 150 | return 0; |
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| 151 | } |
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| 152 | |||
| 153 | static inline int decode_vui_parameters(H264Context *h, SPS *sps) |
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| 154 | { |
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| 155 | int aspect_ratio_info_present_flag; |
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| 156 | unsigned int aspect_ratio_idc; |
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| 157 | |||
| 158 | aspect_ratio_info_present_flag = get_bits1(&h->gb); |
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| 159 | |||
| 160 | if (aspect_ratio_info_present_flag) { |
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| 161 | aspect_ratio_idc = get_bits(&h->gb, 8); |
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| 162 | if (aspect_ratio_idc == EXTENDED_SAR) { |
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| 163 | sps->sar.num = get_bits(&h->gb, 16); |
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| 164 | sps->sar.den = get_bits(&h->gb, 16); |
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| 165 | } else if (aspect_ratio_idc < FF_ARRAY_ELEMS(pixel_aspect)) { |
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| 166 | sps->sar = pixel_aspect[aspect_ratio_idc]; |
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| 167 | } else { |
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| 168 | av_log(h->avctx, AV_LOG_ERROR, "illegal aspect ratio\n"); |
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| 169 | return AVERROR_INVALIDDATA; |
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| 170 | } |
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| 171 | } else { |
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| 172 | sps->sar.num = |
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| 173 | sps->sar.den = 0; |
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| 174 | } |
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| 175 | |||
| 176 | if (get_bits1(&h->gb)) /* overscan_info_present_flag */ |
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| 177 | get_bits1(&h->gb); /* overscan_appropriate_flag */ |
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| 178 | |||
| 179 | sps->video_signal_type_present_flag = get_bits1(&h->gb); |
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| 180 | if (sps->video_signal_type_present_flag) { |
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| 181 | get_bits(&h->gb, 3); /* video_format */ |
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| 182 | sps->full_range = get_bits1(&h->gb); /* video_full_range_flag */ |
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| 183 | |||
| 184 | sps->colour_description_present_flag = get_bits1(&h->gb); |
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| 185 | if (sps->colour_description_present_flag) { |
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| 186 | sps->color_primaries = get_bits(&h->gb, 8); /* colour_primaries */ |
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| 187 | sps->color_trc = get_bits(&h->gb, 8); /* transfer_characteristics */ |
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| 188 | sps->colorspace = get_bits(&h->gb, 8); /* matrix_coefficients */ |
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| 189 | if (sps->color_primaries >= AVCOL_PRI_NB) |
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| 190 | sps->color_primaries = AVCOL_PRI_UNSPECIFIED; |
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| 191 | if (sps->color_trc >= AVCOL_TRC_NB) |
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| 192 | sps->color_trc = AVCOL_TRC_UNSPECIFIED; |
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| 193 | if (sps->colorspace >= AVCOL_SPC_NB) |
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| 194 | sps->colorspace = AVCOL_SPC_UNSPECIFIED; |
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| 195 | } |
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| 196 | } |
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| 197 | |||
| 198 | /* chroma_location_info_present_flag */ |
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| 199 | if (get_bits1(&h->gb)) { |
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| 200 | /* chroma_sample_location_type_top_field */ |
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| 201 | h->avctx->chroma_sample_location = get_ue_golomb(&h->gb) + 1; |
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| 202 | get_ue_golomb(&h->gb); /* chroma_sample_location_type_bottom_field */ |
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| 203 | } |
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| 204 | |||
| 205 | if (show_bits1(&h->gb) && get_bits_left(&h->gb) < 10) { |
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| 206 | av_log(h->avctx, AV_LOG_WARNING, "Truncated VUI\n"); |
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| 207 | return 0; |
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| 208 | } |
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| 209 | |||
| 210 | sps->timing_info_present_flag = get_bits1(&h->gb); |
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| 211 | if (sps->timing_info_present_flag) { |
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| 212 | sps->num_units_in_tick = get_bits_long(&h->gb, 32); |
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| 213 | sps->time_scale = get_bits_long(&h->gb, 32); |
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| 214 | if (!sps->num_units_in_tick || !sps->time_scale) { |
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| 215 | av_log(h->avctx, AV_LOG_ERROR, |
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| 216 | "time_scale/num_units_in_tick invalid or unsupported (%d/%d)\n", |
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| 217 | sps->time_scale, sps->num_units_in_tick); |
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| 218 | return AVERROR_INVALIDDATA; |
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| 219 | } |
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| 220 | sps->fixed_frame_rate_flag = get_bits1(&h->gb); |
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| 221 | } |
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| 222 | |||
| 223 | sps->nal_hrd_parameters_present_flag = get_bits1(&h->gb); |
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| 224 | if (sps->nal_hrd_parameters_present_flag) |
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| 225 | if (decode_hrd_parameters(h, sps) < 0) |
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| 226 | return AVERROR_INVALIDDATA; |
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| 227 | sps->vcl_hrd_parameters_present_flag = get_bits1(&h->gb); |
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| 228 | if (sps->vcl_hrd_parameters_present_flag) |
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| 229 | if (decode_hrd_parameters(h, sps) < 0) |
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| 230 | return AVERROR_INVALIDDATA; |
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| 231 | if (sps->nal_hrd_parameters_present_flag || |
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| 232 | sps->vcl_hrd_parameters_present_flag) |
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| 233 | get_bits1(&h->gb); /* low_delay_hrd_flag */ |
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| 234 | sps->pic_struct_present_flag = get_bits1(&h->gb); |
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| 235 | if (!get_bits_left(&h->gb)) |
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| 236 | return 0; |
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| 237 | sps->bitstream_restriction_flag = get_bits1(&h->gb); |
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| 238 | if (sps->bitstream_restriction_flag) { |
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| 239 | get_bits1(&h->gb); /* motion_vectors_over_pic_boundaries_flag */ |
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| 240 | get_ue_golomb(&h->gb); /* max_bytes_per_pic_denom */ |
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| 241 | get_ue_golomb(&h->gb); /* max_bits_per_mb_denom */ |
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| 242 | get_ue_golomb(&h->gb); /* log2_max_mv_length_horizontal */ |
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| 243 | get_ue_golomb(&h->gb); /* log2_max_mv_length_vertical */ |
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| 244 | sps->num_reorder_frames = get_ue_golomb(&h->gb); |
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| 245 | get_ue_golomb(&h->gb); /*max_dec_frame_buffering*/ |
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| 246 | |||
| 247 | if (get_bits_left(&h->gb) < 0) { |
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| 248 | sps->num_reorder_frames = 0; |
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| 249 | sps->bitstream_restriction_flag = 0; |
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| 250 | } |
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| 251 | |||
| 252 | if (sps->num_reorder_frames > 16U |
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| 253 | /* max_dec_frame_buffering || max_dec_frame_buffering > 16 */) { |
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| 254 | av_log(h->avctx, AV_LOG_ERROR, |
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| 255 | "illegal num_reorder_frames %d\n", sps->num_reorder_frames); |
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| 256 | return AVERROR_INVALIDDATA; |
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| 257 | } |
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| 258 | } |
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| 259 | |||
| 260 | if (get_bits_left(&h->gb) < 0) { |
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| 261 | av_log(h->avctx, AV_LOG_ERROR, |
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| 262 | "Overread VUI by %d bits\n", -get_bits_left(&h->gb)); |
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| 263 | return AVERROR_INVALIDDATA; |
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| 264 | } |
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| 265 | |||
| 266 | return 0; |
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| 267 | } |
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| 268 | |||
| 269 | static void decode_scaling_list(H264Context *h, uint8_t *factors, int size, |
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| 270 | const uint8_t *jvt_list, |
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| 271 | const uint8_t *fallback_list) |
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| 272 | { |
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| 273 | int i, last = 8, next = 8; |
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| 274 | const uint8_t *scan = size == 16 ? zigzag_scan : ff_zigzag_direct; |
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| 275 | if (!get_bits1(&h->gb)) /* matrix not written, we use the predicted one */ |
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| 276 | memcpy(factors, fallback_list, size * sizeof(uint8_t)); |
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| 277 | else |
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| 278 | for (i = 0; i < size; i++) { |
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| 279 | if (next) |
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| 280 | next = (last + get_se_golomb(&h->gb)) & 0xff; |
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| 281 | if (!i && !next) { /* matrix not written, we use the preset one */ |
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| 282 | memcpy(factors, jvt_list, size * sizeof(uint8_t)); |
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| 283 | break; |
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| 284 | } |
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| 285 | last = factors[scan[i]] = next ? next : last; |
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| 286 | } |
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| 287 | } |
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| 288 | |||
| 289 | static void decode_scaling_matrices(H264Context *h, SPS *sps, |
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| 290 | PPS *pps, int is_sps, |
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| 291 | uint8_t(*scaling_matrix4)[16], |
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| 292 | uint8_t(*scaling_matrix8)[64]) |
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| 293 | { |
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| 294 | int fallback_sps = !is_sps && sps->scaling_matrix_present; |
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| 295 | const uint8_t *fallback[4] = { |
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| 296 | fallback_sps ? sps->scaling_matrix4[0] : default_scaling4[0], |
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| 297 | fallback_sps ? sps->scaling_matrix4[3] : default_scaling4[1], |
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| 298 | fallback_sps ? sps->scaling_matrix8[0] : default_scaling8[0], |
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| 299 | fallback_sps ? sps->scaling_matrix8[3] : default_scaling8[1] |
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| 300 | }; |
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| 301 | if (get_bits1(&h->gb)) { |
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| 302 | sps->scaling_matrix_present |= is_sps; |
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| 303 | decode_scaling_list(h, scaling_matrix4[0], 16, default_scaling4[0], fallback[0]); // Intra, Y |
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| 304 | decode_scaling_list(h, scaling_matrix4[1], 16, default_scaling4[0], scaling_matrix4[0]); // Intra, Cr |
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| 305 | decode_scaling_list(h, scaling_matrix4[2], 16, default_scaling4[0], scaling_matrix4[1]); // Intra, Cb |
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| 306 | decode_scaling_list(h, scaling_matrix4[3], 16, default_scaling4[1], fallback[1]); // Inter, Y |
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| 307 | decode_scaling_list(h, scaling_matrix4[4], 16, default_scaling4[1], scaling_matrix4[3]); // Inter, Cr |
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| 308 | decode_scaling_list(h, scaling_matrix4[5], 16, default_scaling4[1], scaling_matrix4[4]); // Inter, Cb |
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| 309 | if (is_sps || pps->transform_8x8_mode) { |
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| 310 | decode_scaling_list(h, scaling_matrix8[0], 64, default_scaling8[0], fallback[2]); // Intra, Y |
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| 311 | decode_scaling_list(h, scaling_matrix8[3], 64, default_scaling8[1], fallback[3]); // Inter, Y |
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| 312 | if (sps->chroma_format_idc == 3) { |
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| 313 | decode_scaling_list(h, scaling_matrix8[1], 64, default_scaling8[0], scaling_matrix8[0]); // Intra, Cr |
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| 314 | decode_scaling_list(h, scaling_matrix8[4], 64, default_scaling8[1], scaling_matrix8[3]); // Inter, Cr |
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| 315 | decode_scaling_list(h, scaling_matrix8[2], 64, default_scaling8[0], scaling_matrix8[1]); // Intra, Cb |
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| 316 | decode_scaling_list(h, scaling_matrix8[5], 64, default_scaling8[1], scaling_matrix8[4]); // Inter, Cb |
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| 317 | } |
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| 318 | } |
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| 319 | } |
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| 320 | } |
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| 321 | |||
| 322 | int ff_h264_decode_seq_parameter_set(H264Context *h) |
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| 323 | { |
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| 324 | int profile_idc, level_idc, constraint_set_flags = 0; |
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| 325 | unsigned int sps_id; |
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| 326 | int i, log2_max_frame_num_minus4; |
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| 327 | SPS *sps; |
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| 328 | |||
| 329 | profile_idc = get_bits(&h->gb, 8); |
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| 330 | constraint_set_flags |= get_bits1(&h->gb) << 0; // constraint_set0_flag |
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| 331 | constraint_set_flags |= get_bits1(&h->gb) << 1; // constraint_set1_flag |
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| 332 | constraint_set_flags |= get_bits1(&h->gb) << 2; // constraint_set2_flag |
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| 333 | constraint_set_flags |= get_bits1(&h->gb) << 3; // constraint_set3_flag |
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| 334 | constraint_set_flags |= get_bits1(&h->gb) << 4; // constraint_set4_flag |
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| 335 | constraint_set_flags |= get_bits1(&h->gb) << 5; // constraint_set5_flag |
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| 336 | get_bits(&h->gb, 2); // reserved |
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| 337 | level_idc = get_bits(&h->gb, 8); |
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| 338 | sps_id = get_ue_golomb_31(&h->gb); |
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| 339 | |||
| 340 | if (sps_id >= MAX_SPS_COUNT) { |
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| 341 | av_log(h->avctx, AV_LOG_ERROR, "sps_id (%d) out of range\n", sps_id); |
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| 342 | return AVERROR_INVALIDDATA; |
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| 343 | } |
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| 344 | sps = av_mallocz(sizeof(SPS)); |
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| 345 | if (!sps) |
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| 346 | return AVERROR(ENOMEM); |
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| 347 | |||
| 348 | sps->time_offset_length = 24; |
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| 349 | sps->profile_idc = profile_idc; |
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| 350 | sps->constraint_set_flags = constraint_set_flags; |
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| 351 | sps->level_idc = level_idc; |
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| 352 | sps->full_range = -1; |
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| 353 | |||
| 354 | memset(sps->scaling_matrix4, 16, sizeof(sps->scaling_matrix4)); |
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| 355 | memset(sps->scaling_matrix8, 16, sizeof(sps->scaling_matrix8)); |
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| 356 | sps->scaling_matrix_present = 0; |
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| 357 | sps->colorspace = 2; //AVCOL_SPC_UNSPECIFIED |
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| 358 | |||
| 359 | if (sps->profile_idc == 100 || sps->profile_idc == 110 || |
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| 360 | sps->profile_idc == 122 || sps->profile_idc == 244 || |
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| 361 | sps->profile_idc == 44 || sps->profile_idc == 83 || |
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| 362 | sps->profile_idc == 86 || sps->profile_idc == 118 || |
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| 363 | sps->profile_idc == 128 || sps->profile_idc == 144) { |
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| 364 | sps->chroma_format_idc = get_ue_golomb_31(&h->gb); |
||
| 365 | if (sps->chroma_format_idc > 3U) { |
||
| 366 | av_log(h->avctx, AV_LOG_ERROR, |
||
| 367 | "chroma_format_idc %d is illegal\n", |
||
| 368 | sps->chroma_format_idc); |
||
| 369 | goto fail; |
||
| 370 | } else if (sps->chroma_format_idc == 3) { |
||
| 371 | sps->residual_color_transform_flag = get_bits1(&h->gb); |
||
| 372 | if (sps->residual_color_transform_flag) { |
||
| 373 | av_log(h->avctx, AV_LOG_ERROR, "separate color planes are not supported\n"); |
||
| 374 | goto fail; |
||
| 375 | } |
||
| 376 | } |
||
| 377 | sps->bit_depth_luma = get_ue_golomb(&h->gb) + 8; |
||
| 378 | sps->bit_depth_chroma = get_ue_golomb(&h->gb) + 8; |
||
| 379 | if (sps->bit_depth_luma > 14U || sps->bit_depth_chroma > 14U || sps->bit_depth_luma != sps->bit_depth_chroma) { |
||
| 380 | av_log(h->avctx, AV_LOG_ERROR, "illegal bit depth value (%d, %d)\n", |
||
| 381 | sps->bit_depth_luma, sps->bit_depth_chroma); |
||
| 382 | goto fail; |
||
| 383 | } |
||
| 384 | sps->transform_bypass = get_bits1(&h->gb); |
||
| 385 | decode_scaling_matrices(h, sps, NULL, 1, |
||
| 386 | sps->scaling_matrix4, sps->scaling_matrix8); |
||
| 387 | } else { |
||
| 388 | sps->chroma_format_idc = 1; |
||
| 389 | sps->bit_depth_luma = 8; |
||
| 390 | sps->bit_depth_chroma = 8; |
||
| 391 | } |
||
| 392 | |||
| 393 | log2_max_frame_num_minus4 = get_ue_golomb(&h->gb); |
||
| 394 | if (log2_max_frame_num_minus4 < MIN_LOG2_MAX_FRAME_NUM - 4 || |
||
| 395 | log2_max_frame_num_minus4 > MAX_LOG2_MAX_FRAME_NUM - 4) { |
||
| 396 | av_log(h->avctx, AV_LOG_ERROR, |
||
| 397 | "log2_max_frame_num_minus4 out of range (0-12): %d\n", |
||
| 398 | log2_max_frame_num_minus4); |
||
| 399 | goto fail; |
||
| 400 | } |
||
| 401 | sps->log2_max_frame_num = log2_max_frame_num_minus4 + 4; |
||
| 402 | |||
| 403 | sps->poc_type = get_ue_golomb_31(&h->gb); |
||
| 404 | |||
| 405 | if (sps->poc_type == 0) { // FIXME #define |
||
| 406 | unsigned t = get_ue_golomb(&h->gb); |
||
| 407 | if (t>12) { |
||
| 408 | av_log(h->avctx, AV_LOG_ERROR, "log2_max_poc_lsb (%d) is out of range\n", t); |
||
| 409 | goto fail; |
||
| 410 | } |
||
| 411 | sps->log2_max_poc_lsb = t + 4; |
||
| 412 | } else if (sps->poc_type == 1) { // FIXME #define |
||
| 413 | sps->delta_pic_order_always_zero_flag = get_bits1(&h->gb); |
||
| 414 | sps->offset_for_non_ref_pic = get_se_golomb(&h->gb); |
||
| 415 | sps->offset_for_top_to_bottom_field = get_se_golomb(&h->gb); |
||
| 416 | sps->poc_cycle_length = get_ue_golomb(&h->gb); |
||
| 417 | |||
| 418 | if ((unsigned)sps->poc_cycle_length >= |
||
| 419 | FF_ARRAY_ELEMS(sps->offset_for_ref_frame)) { |
||
| 420 | av_log(h->avctx, AV_LOG_ERROR, |
||
| 421 | "poc_cycle_length overflow %u\n", sps->poc_cycle_length); |
||
| 422 | goto fail; |
||
| 423 | } |
||
| 424 | |||
| 425 | for (i = 0; i < sps->poc_cycle_length; i++) |
||
| 426 | sps->offset_for_ref_frame[i] = get_se_golomb(&h->gb); |
||
| 427 | } else if (sps->poc_type != 2) { |
||
| 428 | av_log(h->avctx, AV_LOG_ERROR, "illegal POC type %d\n", sps->poc_type); |
||
| 429 | goto fail; |
||
| 430 | } |
||
| 431 | |||
| 432 | sps->ref_frame_count = get_ue_golomb_31(&h->gb); |
||
| 433 | if (h->avctx->codec_tag == MKTAG('S', 'M', 'V', '2')) |
||
| 434 | sps->ref_frame_count = FFMAX(2, sps->ref_frame_count); |
||
| 435 | if (sps->ref_frame_count > MAX_PICTURE_COUNT - 2 || |
||
| 436 | sps->ref_frame_count > 16U) { |
||
| 437 | av_log(h->avctx, AV_LOG_ERROR, "too many reference frames\n"); |
||
| 438 | goto fail; |
||
| 439 | } |
||
| 440 | sps->gaps_in_frame_num_allowed_flag = get_bits1(&h->gb); |
||
| 441 | sps->mb_width = get_ue_golomb(&h->gb) + 1; |
||
| 442 | sps->mb_height = get_ue_golomb(&h->gb) + 1; |
||
| 443 | if ((unsigned)sps->mb_width >= INT_MAX / 16 || |
||
| 444 | (unsigned)sps->mb_height >= INT_MAX / 16 || |
||
| 445 | av_image_check_size(16 * sps->mb_width, |
||
| 446 | 16 * sps->mb_height, 0, h->avctx)) { |
||
| 447 | av_log(h->avctx, AV_LOG_ERROR, "mb_width/height overflow\n"); |
||
| 448 | goto fail; |
||
| 449 | } |
||
| 450 | |||
| 451 | sps->frame_mbs_only_flag = get_bits1(&h->gb); |
||
| 452 | if (!sps->frame_mbs_only_flag) |
||
| 453 | sps->mb_aff = get_bits1(&h->gb); |
||
| 454 | else |
||
| 455 | sps->mb_aff = 0; |
||
| 456 | |||
| 457 | sps->direct_8x8_inference_flag = get_bits1(&h->gb); |
||
| 458 | |||
| 459 | #ifndef ALLOW_INTERLACE |
||
| 460 | if (sps->mb_aff) |
||
| 461 | av_log(h->avctx, AV_LOG_ERROR, |
||
| 462 | "MBAFF support not included; enable it at compile-time.\n"); |
||
| 463 | #endif |
||
| 464 | sps->crop = get_bits1(&h->gb); |
||
| 465 | if (sps->crop) { |
||
| 466 | int crop_left = get_ue_golomb(&h->gb); |
||
| 467 | int crop_right = get_ue_golomb(&h->gb); |
||
| 468 | int crop_top = get_ue_golomb(&h->gb); |
||
| 469 | int crop_bottom = get_ue_golomb(&h->gb); |
||
| 470 | int width = 16 * sps->mb_width; |
||
| 471 | int height = 16 * sps->mb_height * (2 - sps->frame_mbs_only_flag); |
||
| 472 | |||
| 473 | if (h->avctx->flags2 & CODEC_FLAG2_IGNORE_CROP) { |
||
| 474 | av_log(h->avctx, AV_LOG_DEBUG, "discarding sps cropping, original " |
||
| 475 | "values are l:%u r:%u t:%u b:%u\n", |
||
| 476 | crop_left, crop_right, crop_top, crop_bottom); |
||
| 477 | |||
| 478 | sps->crop_left = |
||
| 479 | sps->crop_right = |
||
| 480 | sps->crop_top = |
||
| 481 | sps->crop_bottom = 0; |
||
| 482 | } else { |
||
| 483 | int vsub = (sps->chroma_format_idc == 1) ? 1 : 0; |
||
| 484 | int hsub = (sps->chroma_format_idc == 1 || |
||
| 485 | sps->chroma_format_idc == 2) ? 1 : 0; |
||
| 486 | int step_x = 1 << hsub; |
||
| 487 | int step_y = (2 - sps->frame_mbs_only_flag) << vsub; |
||
| 488 | |||
| 489 | if (crop_left & (0x1F >> (sps->bit_depth_luma > 8)) && |
||
| 490 | !(h->avctx->flags & CODEC_FLAG_UNALIGNED)) { |
||
| 491 | crop_left &= ~(0x1F >> (sps->bit_depth_luma > 8)); |
||
| 492 | av_log(h->avctx, AV_LOG_WARNING, |
||
| 493 | "Reducing left cropping to %d " |
||
| 494 | "chroma samples to preserve alignment.\n", |
||
| 495 | crop_left); |
||
| 496 | } |
||
| 497 | |||
| 498 | if (crop_left > (unsigned)INT_MAX / 4 / step_x || |
||
| 499 | crop_right > (unsigned)INT_MAX / 4 / step_x || |
||
| 500 | crop_top > (unsigned)INT_MAX / 4 / step_y || |
||
| 501 | crop_bottom> (unsigned)INT_MAX / 4 / step_y || |
||
| 502 | (crop_left + crop_right ) * step_x >= width || |
||
| 503 | (crop_top + crop_bottom) * step_y >= height |
||
| 504 | ) { |
||
| 505 | av_log(h->avctx, AV_LOG_ERROR, "crop values invalid %d %d %d %d / %d %d\n", crop_left, crop_right, crop_top, crop_bottom, width, height); |
||
| 506 | goto fail; |
||
| 507 | } |
||
| 508 | |||
| 509 | sps->crop_left = crop_left * step_x; |
||
| 510 | sps->crop_right = crop_right * step_x; |
||
| 511 | sps->crop_top = crop_top * step_y; |
||
| 512 | sps->crop_bottom = crop_bottom * step_y; |
||
| 513 | } |
||
| 514 | } else { |
||
| 515 | sps->crop_left = |
||
| 516 | sps->crop_right = |
||
| 517 | sps->crop_top = |
||
| 518 | sps->crop_bottom = |
||
| 519 | sps->crop = 0; |
||
| 520 | } |
||
| 521 | |||
| 522 | sps->vui_parameters_present_flag = get_bits1(&h->gb); |
||
| 523 | if (sps->vui_parameters_present_flag) |
||
| 524 | if (decode_vui_parameters(h, sps) < 0) |
||
| 525 | goto fail; |
||
| 526 | |||
| 527 | if (!sps->sar.den) |
||
| 528 | sps->sar.den = 1; |
||
| 529 | |||
| 530 | if (h->avctx->debug & FF_DEBUG_PICT_INFO) { |
||
| 531 | static const char csp[4][5] = { "Gray", "420", "422", "444" }; |
||
| 532 | av_log(h->avctx, AV_LOG_DEBUG, |
||
| 533 | "sps:%u profile:%d/%d poc:%d ref:%d %dx%d %s %s crop:%d/%d/%d/%d %s %s %d/%d b%d reo:%d\n", |
||
| 534 | sps_id, sps->profile_idc, sps->level_idc, |
||
| 535 | sps->poc_type, |
||
| 536 | sps->ref_frame_count, |
||
| 537 | sps->mb_width, sps->mb_height, |
||
| 538 | sps->frame_mbs_only_flag ? "FRM" : (sps->mb_aff ? "MB-AFF" : "PIC-AFF"), |
||
| 539 | sps->direct_8x8_inference_flag ? "8B8" : "", |
||
| 540 | sps->crop_left, sps->crop_right, |
||
| 541 | sps->crop_top, sps->crop_bottom, |
||
| 542 | sps->vui_parameters_present_flag ? "VUI" : "", |
||
| 543 | csp[sps->chroma_format_idc], |
||
| 544 | sps->timing_info_present_flag ? sps->num_units_in_tick : 0, |
||
| 545 | sps->timing_info_present_flag ? sps->time_scale : 0, |
||
| 546 | sps->bit_depth_luma, |
||
| 547 | h->sps.bitstream_restriction_flag ? sps->num_reorder_frames : -1 |
||
| 548 | ); |
||
| 549 | } |
||
| 550 | sps->new = 1; |
||
| 551 | |||
| 552 | av_free(h->sps_buffers[sps_id]); |
||
| 553 | h->sps_buffers[sps_id] = sps; |
||
| 554 | |||
| 555 | return 0; |
||
| 556 | |||
| 557 | fail: |
||
| 558 | av_free(sps); |
||
| 559 | return -1; |
||
| 560 | } |
||
| 561 | |||
| 562 | static void build_qp_table(PPS *pps, int t, int index, const int depth) |
||
| 563 | { |
||
| 564 | int i; |
||
| 565 | const int max_qp = 51 + 6 * (depth - 8); |
||
| 566 | for (i = 0; i < max_qp + 1; i++) |
||
| 567 | pps->chroma_qp_table[t][i] = |
||
| 568 | ff_h264_chroma_qp[depth - 8][av_clip(i + index, 0, max_qp)]; |
||
| 569 | } |
||
| 570 | |||
| 571 | static int more_rbsp_data_in_pps(H264Context *h, PPS *pps) |
||
| 572 | { |
||
| 573 | const SPS *sps = h->sps_buffers[pps->sps_id]; |
||
| 574 | int profile_idc = sps->profile_idc; |
||
| 575 | |||
| 576 | if ((profile_idc == 66 || profile_idc == 77 || |
||
| 577 | profile_idc == 88) && (sps->constraint_set_flags & 7)) { |
||
| 578 | av_log(h->avctx, AV_LOG_VERBOSE, |
||
| 579 | "Current profile doesn't provide more RBSP data in PPS, skipping\n"); |
||
| 580 | return 0; |
||
| 581 | } |
||
| 582 | |||
| 583 | return 1; |
||
| 584 | } |
||
| 585 | |||
| 586 | int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length) |
||
| 587 | { |
||
| 588 | unsigned int pps_id = get_ue_golomb(&h->gb); |
||
| 589 | PPS *pps; |
||
| 590 | SPS *sps; |
||
| 591 | int qp_bd_offset; |
||
| 592 | int bits_left; |
||
| 593 | |||
| 594 | if (pps_id >= MAX_PPS_COUNT) { |
||
| 595 | av_log(h->avctx, AV_LOG_ERROR, "pps_id (%d) out of range\n", pps_id); |
||
| 596 | return AVERROR_INVALIDDATA; |
||
| 597 | } |
||
| 598 | |||
| 599 | pps = av_mallocz(sizeof(PPS)); |
||
| 600 | if (!pps) |
||
| 601 | return AVERROR(ENOMEM); |
||
| 602 | pps->sps_id = get_ue_golomb_31(&h->gb); |
||
| 603 | if ((unsigned)pps->sps_id >= MAX_SPS_COUNT || |
||
| 604 | h->sps_buffers[pps->sps_id] == NULL) { |
||
| 605 | av_log(h->avctx, AV_LOG_ERROR, "sps_id out of range\n"); |
||
| 606 | goto fail; |
||
| 607 | } |
||
| 608 | sps = h->sps_buffers[pps->sps_id]; |
||
| 609 | qp_bd_offset = 6 * (sps->bit_depth_luma - 8); |
||
| 610 | if (sps->bit_depth_luma > 14) { |
||
| 611 | av_log(h->avctx, AV_LOG_ERROR, |
||
| 612 | "Invalid luma bit depth=%d\n", |
||
| 613 | sps->bit_depth_luma); |
||
| 614 | goto fail; |
||
| 615 | } else if (sps->bit_depth_luma == 11 || sps->bit_depth_luma == 13) { |
||
| 616 | av_log(h->avctx, AV_LOG_ERROR, |
||
| 617 | "Unimplemented luma bit depth=%d\n", |
||
| 618 | sps->bit_depth_luma); |
||
| 619 | goto fail; |
||
| 620 | } |
||
| 621 | |||
| 622 | pps->cabac = get_bits1(&h->gb); |
||
| 623 | pps->pic_order_present = get_bits1(&h->gb); |
||
| 624 | pps->slice_group_count = get_ue_golomb(&h->gb) + 1; |
||
| 625 | if (pps->slice_group_count > 1) { |
||
| 626 | pps->mb_slice_group_map_type = get_ue_golomb(&h->gb); |
||
| 627 | av_log(h->avctx, AV_LOG_ERROR, "FMO not supported\n"); |
||
| 628 | switch (pps->mb_slice_group_map_type) { |
||
| 629 | case 0: |
||
| 630 | #if 0 |
||
| 631 | | for (i = 0; i <= num_slice_groups_minus1; i++) | | | |
||
| 632 | | run_length[i] |1 |ue(v) | |
||
| 633 | #endif |
||
| 634 | break; |
||
| 635 | case 2: |
||
| 636 | #if 0 |
||
| 637 | | for (i = 0; i < num_slice_groups_minus1; i++) { | | | |
||
| 638 | | top_left_mb[i] |1 |ue(v) | |
||
| 639 | | bottom_right_mb[i] |1 |ue(v) | |
||
| 640 | | } | | | |
||
| 641 | #endif |
||
| 642 | break; |
||
| 643 | case 3: |
||
| 644 | case 4: |
||
| 645 | case 5: |
||
| 646 | #if 0 |
||
| 647 | | slice_group_change_direction_flag |1 |u(1) | |
||
| 648 | | slice_group_change_rate_minus1 |1 |ue(v) | |
||
| 649 | #endif |
||
| 650 | break; |
||
| 651 | case 6: |
||
| 652 | #if 0 |
||
| 653 | | slice_group_id_cnt_minus1 |1 |ue(v) | |
||
| 654 | | for (i = 0; i <= slice_group_id_cnt_minus1; i++)| | | |
||
| 655 | | slice_group_id[i] |1 |u(v) | |
||
| 656 | #endif |
||
| 657 | break; |
||
| 658 | } |
||
| 659 | } |
||
| 660 | pps->ref_count[0] = get_ue_golomb(&h->gb) + 1; |
||
| 661 | pps->ref_count[1] = get_ue_golomb(&h->gb) + 1; |
||
| 662 | if (pps->ref_count[0] - 1 > 32 - 1 || pps->ref_count[1] - 1 > 32 - 1) { |
||
| 663 | av_log(h->avctx, AV_LOG_ERROR, "reference overflow (pps)\n"); |
||
| 664 | goto fail; |
||
| 665 | } |
||
| 666 | |||
| 667 | pps->weighted_pred = get_bits1(&h->gb); |
||
| 668 | pps->weighted_bipred_idc = get_bits(&h->gb, 2); |
||
| 669 | pps->init_qp = get_se_golomb(&h->gb) + 26 + qp_bd_offset; |
||
| 670 | pps->init_qs = get_se_golomb(&h->gb) + 26 + qp_bd_offset; |
||
| 671 | pps->chroma_qp_index_offset[0] = get_se_golomb(&h->gb); |
||
| 672 | pps->deblocking_filter_parameters_present = get_bits1(&h->gb); |
||
| 673 | pps->constrained_intra_pred = get_bits1(&h->gb); |
||
| 674 | pps->redundant_pic_cnt_present = get_bits1(&h->gb); |
||
| 675 | |||
| 676 | pps->transform_8x8_mode = 0; |
||
| 677 | // contents of sps/pps can change even if id doesn't, so reinit |
||
| 678 | h->dequant_coeff_pps = -1; |
||
| 679 | memcpy(pps->scaling_matrix4, h->sps_buffers[pps->sps_id]->scaling_matrix4, |
||
| 680 | sizeof(pps->scaling_matrix4)); |
||
| 681 | memcpy(pps->scaling_matrix8, h->sps_buffers[pps->sps_id]->scaling_matrix8, |
||
| 682 | sizeof(pps->scaling_matrix8)); |
||
| 683 | |||
| 684 | bits_left = bit_length - get_bits_count(&h->gb); |
||
| 685 | if (bits_left > 0 && more_rbsp_data_in_pps(h, pps)) { |
||
| 686 | pps->transform_8x8_mode = get_bits1(&h->gb); |
||
| 687 | decode_scaling_matrices(h, h->sps_buffers[pps->sps_id], pps, 0, |
||
| 688 | pps->scaling_matrix4, pps->scaling_matrix8); |
||
| 689 | // second_chroma_qp_index_offset |
||
| 690 | pps->chroma_qp_index_offset[1] = get_se_golomb(&h->gb); |
||
| 691 | } else { |
||
| 692 | pps->chroma_qp_index_offset[1] = pps->chroma_qp_index_offset[0]; |
||
| 693 | } |
||
| 694 | |||
| 695 | build_qp_table(pps, 0, pps->chroma_qp_index_offset[0], sps->bit_depth_luma); |
||
| 696 | build_qp_table(pps, 1, pps->chroma_qp_index_offset[1], sps->bit_depth_luma); |
||
| 697 | if (pps->chroma_qp_index_offset[0] != pps->chroma_qp_index_offset[1]) |
||
| 698 | pps->chroma_qp_diff = 1; |
||
| 699 | |||
| 700 | if (h->avctx->debug & FF_DEBUG_PICT_INFO) { |
||
| 701 | av_log(h->avctx, AV_LOG_DEBUG, |
||
| 702 | "pps:%u sps:%u %s slice_groups:%d ref:%d/%d %s qp:%d/%d/%d/%d %s %s %s %s\n", |
||
| 703 | pps_id, pps->sps_id, |
||
| 704 | pps->cabac ? "CABAC" : "CAVLC", |
||
| 705 | pps->slice_group_count, |
||
| 706 | pps->ref_count[0], pps->ref_count[1], |
||
| 707 | pps->weighted_pred ? "weighted" : "", |
||
| 708 | pps->init_qp, pps->init_qs, pps->chroma_qp_index_offset[0], pps->chroma_qp_index_offset[1], |
||
| 709 | pps->deblocking_filter_parameters_present ? "LPAR" : "", |
||
| 710 | pps->constrained_intra_pred ? "CONSTR" : "", |
||
| 711 | pps->redundant_pic_cnt_present ? "REDU" : "", |
||
| 712 | pps->transform_8x8_mode ? "8x8DCT" : ""); |
||
| 713 | } |
||
| 714 | |||
| 715 | av_free(h->pps_buffers[pps_id]); |
||
| 716 | h->pps_buffers[pps_id] = pps; |
||
| 717 | return 0; |
||
| 718 | |||
| 719 | fail: |
||
| 720 | av_free(pps); |
||
| 721 | return -1; |
||
| 722 | } |