| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #include <stddef.h> | ||
| 20 | #include <stdint.h> | ||
| 21 | |||
| 22 | #include "libavutil/intreadwrite.h" | ||
| 23 | #include "libavutil/mem.h" | ||
| 24 | #include "atsc_a53.h" | ||
| 25 | |||
| 26 | ✗ | int ff_alloc_a53_sei(const AVFrame *frame, size_t prefix_len, | |
| 27 | void **data, size_t *sei_size) | ||
| 28 | { | ||
| 29 | ✗ | AVFrameSideData *side_data = NULL; | |
| 30 | uint8_t *sei_data; | ||
| 31 | |||
| 32 | ✗ | if (frame) | |
| 33 | ✗ | side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_A53_CC); | |
| 34 | |||
| 35 | ✗ | if (!side_data) { | |
| 36 | ✗ | *data = NULL; | |
| 37 | ✗ | return 0; | |
| 38 | } | ||
| 39 | |||
| 40 | ✗ | *sei_size = side_data->size + 11; | |
| 41 | ✗ | *data = av_mallocz(*sei_size + prefix_len); | |
| 42 | ✗ | if (!*data) | |
| 43 | ✗ | return AVERROR(ENOMEM); | |
| 44 | ✗ | sei_data = (uint8_t*)*data + prefix_len; | |
| 45 | |||
| 46 | // country code | ||
| 47 | ✗ | sei_data[0] = 181; | |
| 48 | ✗ | sei_data[1] = 0; | |
| 49 | ✗ | sei_data[2] = 49; | |
| 50 | |||
| 51 | /** | ||
| 52 | * 'GA94' is standard in North America for ATSC, but hard coding | ||
| 53 | * this style may not be the right thing to do -- other formats | ||
| 54 | * do exist. This information is not available in the side_data | ||
| 55 | * so we are going with this right now. | ||
| 56 | */ | ||
| 57 | ✗ | AV_WL32(sei_data + 3, MKTAG('G', 'A', '9', '4')); | |
| 58 | ✗ | sei_data[7] = 3; | |
| 59 | ✗ | sei_data[8] = ((side_data->size/3) & 0x1f) | 0x40; | |
| 60 | ✗ | sei_data[9] = 0; | |
| 61 | |||
| 62 | ✗ | memcpy(sei_data + 10, side_data->data, side_data->size); | |
| 63 | |||
| 64 | ✗ | sei_data[side_data->size+10] = 255; | |
| 65 | |||
| 66 | ✗ | return 0; | |
| 67 | } | ||
| 68 | |||
| 69 | 6 | int ff_parse_a53_cc(AVBufferRef **pbuf, const uint8_t *data, int size) | |
| 70 | { | ||
| 71 | 6 | AVBufferRef *buf = *pbuf; | |
| 72 |
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6 | size_t new_size, old_size = buf ? buf->size : 0; |
| 73 | int ret, cc_count; | ||
| 74 | |||
| 75 |
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6 | if (size < 3) |
| 76 | ✗ | return AVERROR_INVALIDDATA; | |
| 77 | |||
| 78 |
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6 | if (data[0] != 0x3) // user_data_type_code |
| 79 | ✗ | return 0; | |
| 80 | |||
| 81 |
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6 | if (!(data[1] & 0x40)) // process_cc_data_flag |
| 82 | ✗ | return 0; | |
| 83 | |||
| 84 | 6 | cc_count = data[1] & 0x1F; | |
| 85 |
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6 | if (!cc_count) |
| 86 | ✗ | return 0; | |
| 87 | |||
| 88 | // content of data[2] is reserved | ||
| 89 | /* 3 bytes per CC plus one byte marker_bits at the end */ | ||
| 90 |
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6 | if (cc_count * 3 >= size - 3) |
| 91 | ✗ | return AVERROR_INVALIDDATA; | |
| 92 | |||
| 93 | 6 | new_size = (old_size + cc_count * 3); | |
| 94 | |||
| 95 |
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6 | if (new_size > INT_MAX) |
| 96 | ✗ | return AVERROR_INVALIDDATA; | |
| 97 | |||
| 98 | /* Allow merging of the cc data from two fields. */ | ||
| 99 | 6 | ret = av_buffer_realloc(pbuf, new_size); | |
| 100 |
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6 | if (ret < 0) |
| 101 | ✗ | return ret; | |
| 102 | |||
| 103 | 6 | buf = *pbuf; | |
| 104 | /* Use of av_buffer_realloc assumes buffer is writeable */ | ||
| 105 | 6 | memcpy(buf->data + old_size, data + 3, cc_count * 3); | |
| 106 | |||
| 107 | 6 | return cc_count; | |
| 108 | } | ||
| 109 |