| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * EVC helper functions for muxers | ||
| 3 | * Copyright (c) 2022 Dawid Kozinski <d.kozinski@samsung.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 | #ifndef AVFORMAT_EVC_H | ||
| 23 | #define AVFORMAT_EVC_H | ||
| 24 | |||
| 25 | #include <stdint.h> | ||
| 26 | |||
| 27 | #include "libavutil/intreadwrite.h" | ||
| 28 | #include "libavutil/rational.h" | ||
| 29 | #include "libavcodec/evc.h" | ||
| 30 | #include "avio.h" | ||
| 31 | |||
| 32 | 1375 | static inline int evc_get_nalu_type(const uint8_t *p, int bits_size) | |
| 33 | { | ||
| 34 | 1375 | int unit_type_plus1 = 0; | |
| 35 | |||
| 36 |
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1375 | if (bits_size >= EVC_NALU_HEADER_SIZE) { |
| 37 | // forbidden_zero_bit | ||
| 38 |
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1375 | if ((p[0] & 0x80) != 0) // Cannot get bitstream information. Malformed bitstream. |
| 39 | 37 | return -1; | |
| 40 | |||
| 41 | // nal_unit_type | ||
| 42 | 1338 | unit_type_plus1 = (p[0] >> 1) & 0x3F; | |
| 43 | } | ||
| 44 | |||
| 45 | 1338 | return unit_type_plus1 - 1; | |
| 46 | } | ||
| 47 | |||
| 48 | 8864 | static inline uint32_t evc_read_nal_unit_length(const uint8_t *bits, int bits_size) | |
| 49 | { | ||
| 50 |
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8864 | if (bits_size >= EVC_NALU_LENGTH_PREFIX_SIZE) |
| 51 | 8864 | return AV_RB32(bits); | |
| 52 | |||
| 53 | ✗ | return 0; | |
| 54 | } | ||
| 55 | |||
| 56 | /** | ||
| 57 | * Writes EVC sample metadata to the provided AVIOContext. | ||
| 58 | * | ||
| 59 | * @param pb pointer to the AVIOContext where the evc sample metadata shall be written | ||
| 60 | * @param buf input data buffer | ||
| 61 | * @param size size in bytes of the input data buffer | ||
| 62 | * @param ps_array_completeness @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.3 | ||
| 63 | * | ||
| 64 | * @return 0 in case of success, a negative error code in case of failure | ||
| 65 | */ | ||
| 66 | int ff_isom_write_evcc(AVIOContext *pb, const uint8_t *data, | ||
| 67 | int size, int ps_array_completeness); | ||
| 68 | |||
| 69 | #endif // AVFORMAT_EVC_H | ||
| 70 |