| 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 | /** | ||
| 20 | * @file | ||
| 21 | * replaygain tags parsing | ||
| 22 | */ | ||
| 23 | |||
| 24 | #include <stdint.h> | ||
| 25 | #include <stdlib.h> | ||
| 26 | #include <string.h> | ||
| 27 | |||
| 28 | #include "libavutil/avstring.h" | ||
| 29 | #include "libavutil/dict.h" | ||
| 30 | #include "libavutil/intreadwrite.h" | ||
| 31 | #include "libavutil/mathematics.h" | ||
| 32 | #include "libavutil/replaygain.h" | ||
| 33 | |||
| 34 | #include "avformat.h" | ||
| 35 | #include "internal.h" | ||
| 36 | #include "replaygain.h" | ||
| 37 | |||
| 38 | 1468 | static int32_t parse_value(const char *value, int32_t min) | |
| 39 | { | ||
| 40 | char *fraction; | ||
| 41 | 1468 | int scale = 10000; | |
| 42 | 1468 | int32_t mb = 0; | |
| 43 | 1468 | int sign = 1; | |
| 44 | int db; | ||
| 45 | |||
| 46 |
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1468 | if (!value) |
| 47 | 1468 | return min; | |
| 48 | |||
| 49 | ✗ | value += strspn(value, " \t"); | |
| 50 | |||
| 51 | ✗ | if (*value == '-') | |
| 52 | ✗ | sign = -1; | |
| 53 | |||
| 54 | ✗ | db = strtol(value, &fraction, 0); | |
| 55 | ✗ | if (*fraction++ == '.') { | |
| 56 | ✗ | while (av_isdigit(*fraction) && scale) { | |
| 57 | ✗ | mb += scale * (*fraction - '0'); | |
| 58 | ✗ | scale /= 10; | |
| 59 | ✗ | fraction++; | |
| 60 | } | ||
| 61 | } | ||
| 62 | |||
| 63 | ✗ | if (llabs(db) > (INT32_MAX - mb) / 100000) | |
| 64 | ✗ | return min; | |
| 65 | |||
| 66 | ✗ | return db * 100000 + sign * mb; | |
| 67 | } | ||
| 68 | |||
| 69 | 379 | int ff_replaygain_export_raw(AVStream *st, int32_t tg, uint32_t tp, | |
| 70 | int32_t ag, uint32_t ap) | ||
| 71 | { | ||
| 72 | AVPacketSideData *sd; | ||
| 73 | AVReplayGain *replaygain; | ||
| 74 | |||
| 75 |
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379 | if (tg == INT32_MIN && ag == INT32_MIN) |
| 76 | 379 | return 0; | |
| 77 | |||
| 78 | ✗ | sd = av_packet_side_data_new(&st->codecpar->coded_side_data, | |
| 79 | ✗ | &st->codecpar->nb_coded_side_data, | |
| 80 | AV_PKT_DATA_REPLAYGAIN, | ||
| 81 | sizeof(*replaygain), 0); | ||
| 82 | ✗ | if (!sd) | |
| 83 | ✗ | return AVERROR(ENOMEM); | |
| 84 | |||
| 85 | ✗ | replaygain = (AVReplayGain*)sd->data; | |
| 86 | ✗ | replaygain->track_gain = tg; | |
| 87 | ✗ | replaygain->track_peak = tp; | |
| 88 | ✗ | replaygain->album_gain = ag; | |
| 89 | ✗ | replaygain->album_peak = ap; | |
| 90 | |||
| 91 | ✗ | return 0; | |
| 92 | } | ||
| 93 | |||
| 94 | 367 | int ff_replaygain_export(AVStream *st, AVDictionary *metadata) | |
| 95 | { | ||
| 96 | const AVDictionaryEntry *tg, *tp, *ag, *ap; | ||
| 97 | |||
| 98 | 367 | tg = av_dict_get(metadata, "REPLAYGAIN_TRACK_GAIN", NULL, 0); | |
| 99 | 367 | tp = av_dict_get(metadata, "REPLAYGAIN_TRACK_PEAK", NULL, 0); | |
| 100 | 367 | ag = av_dict_get(metadata, "REPLAYGAIN_ALBUM_GAIN", NULL, 0); | |
| 101 | 367 | ap = av_dict_get(metadata, "REPLAYGAIN_ALBUM_PEAK", NULL, 0); | |
| 102 | |||
| 103 |
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734 | return ff_replaygain_export_raw(st, |
| 104 | parse_value(tg ? tg->value : NULL, INT32_MIN), | ||
| 105 |
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367 | parse_value(tp ? tp->value : NULL, 0), |
| 106 | parse_value(ag ? ag->value : NULL, INT32_MIN), | ||
| 107 |
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367 | parse_value(ap ? ap->value : NULL, 0)); |
| 108 | } | ||
| 109 |