| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * RAW H.266 / VVC video demuxer | ||
| 3 | * Copyright (c) 2020 Nuo Mi <nuomi2021@gmail.com> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "libavcodec/vvc.h" | ||
| 23 | |||
| 24 | #include "avformat.h" | ||
| 25 | #include "rawdec.h" | ||
| 26 | |||
| 27 | 5515 | static int check_temporal_id(uint8_t nuh_temporal_id_plus1, int type) | |
| 28 | { | ||
| 29 |
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5515 | if (nuh_temporal_id_plus1 == 0) |
| 30 | 1489 | return 0; | |
| 31 | |||
| 32 |
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4026 | if (nuh_temporal_id_plus1 != 1) { |
| 33 |
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1731 | if (type >= VVC_IDR_W_RADL && type <= VVC_RSV_IRAP_11 |
| 34 |
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1551 | || type == VVC_DCI_NUT || type == VVC_OPI_NUT |
| 35 |
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1470 | || type == VVC_VPS_NUT || type == VVC_SPS_NUT |
| 36 |
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1438 | || type == VVC_EOS_NUT || type == VVC_EOB_NUT) |
| 37 | 320 | return 0; | |
| 38 | } | ||
| 39 | |||
| 40 | 3706 | return 1; | |
| 41 | } | ||
| 42 | |||
| 43 | 7957 | static int vvc_probe(const AVProbeData *p) | |
| 44 | { | ||
| 45 | 7957 | uint32_t code = -1; | |
| 46 | 7957 | int sps = 0, pps = 0, irap = 0; | |
| 47 | 7957 | int valid_pps = 0, valid_irap = 0; | |
| 48 | int i; | ||
| 49 | |||
| 50 |
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408119557 | for (i = 0; i < p->buf_size - 1; i++) { |
| 51 | 408114534 | code = (code << 8) + p->buf[i]; | |
| 52 |
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408114534 | if ((code & 0xffffff00) == 0x100) { |
| 53 | 6640 | uint8_t nal2 = p->buf[i + 1]; | |
| 54 | 6640 | int type = (nal2 & 0xF8) >> 3; | |
| 55 | |||
| 56 |
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6640 | if (code & 0x80) // forbidden_zero_bit |
| 57 | 1094 | return 0; | |
| 58 | |||
| 59 |
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5546 | if ((code & 0x3F) > 55) // nuh_layer_id must be in [0, 55] |
| 60 | 31 | return 0; | |
| 61 | |||
| 62 |
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5515 | if (!check_temporal_id(nal2 & 0x7, type)) |
| 63 | 1809 | return 0; | |
| 64 | |||
| 65 |
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3706 | switch (type) { |
| 66 | 69 | case VVC_SPS_NUT: sps++; break; | |
| 67 | 252 | case VVC_PPS_NUT: | |
| 68 | 252 | pps++; | |
| 69 |
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252 | if (sps) |
| 70 | 235 | valid_pps++; | |
| 71 | 252 | break; | |
| 72 | 74 | case VVC_IDR_N_LP: | |
| 73 | case VVC_IDR_W_RADL: | ||
| 74 | case VVC_CRA_NUT: | ||
| 75 | case VVC_GDR_NUT: | ||
| 76 | 74 | irap++; | |
| 77 |
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74 | if (valid_pps) |
| 78 | 70 | valid_irap++; | |
| 79 | 74 | break; | |
| 80 | } | ||
| 81 | } | ||
| 82 | } | ||
| 83 | |||
| 84 |
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5023 | if (valid_irap) |
| 85 | 60 | return AVPROBE_SCORE_EXTENSION + 1; // 1 more than .mpg | |
| 86 |
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4963 | if (sps && pps && irap) |
| 87 | ✗ | return AVPROBE_SCORE_EXTENSION / 2; | |
| 88 |
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4963 | if (sps || pps || irap) |
| 89 | 6 | return AVPROBE_SCORE_EXTENSION / 4; | |
| 90 | 4957 | return 0; | |
| 91 | } | ||
| 92 | |||
| 93 | FF_DEF_RAWVIDEO_DEMUXER(vvc, "raw H.266/VVC video", vvc_probe, "h266,266,vvc", AV_CODEC_ID_VVC) | ||
| 94 |