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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * Copyright (C) 2006 Smartjog S.A.S, Baptiste Coudurier |
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| 3 | * Copyright (C) 2011 Smartjog S.A.S, Clément Bœsch |
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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 | * Timecode helpers |
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| 25 | * This *private* API is deprecated, please use the one available in libavutil instead. |
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| 26 | */ |
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| 27 | |||
| 28 | #include "version.h" |
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| 29 | |||
| 30 | #if FF_API_OLD_TIMECODE |
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| 31 | |||
| 32 | #include |
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| 33 | #include "timecode.h" |
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| 34 | #include "libavutil/log.h" |
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| 35 | |||
| 36 | int avpriv_framenum_to_drop_timecode(int frame_num) |
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| 37 | { |
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| 38 | /* only works for NTSC 29.97 */ |
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| 39 | int d = frame_num / 17982; |
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| 40 | int m = frame_num % 17982; |
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| 41 | //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */ |
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| 42 | return frame_num + 18 * d + 2 * ((m - 2) / 1798); |
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| 43 | } |
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| 44 | |||
| 45 | uint32_t avpriv_framenum_to_smpte_timecode(unsigned frame, int fps, int drop) |
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| 46 | { |
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| 47 | return (0 << 31) | // color frame flag |
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| 48 | (drop << 30) | // drop frame flag |
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| 49 | ( ((frame % fps) / 10) << 28) | // tens of frames |
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| 50 | ( ((frame % fps) % 10) << 24) | // units of frames |
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| 51 | (0 << 23) | // field phase (NTSC), b0 (PAL) |
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| 52 | ((((frame / fps) % 60) / 10) << 20) | // tens of seconds |
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| 53 | ((((frame / fps) % 60) % 10) << 16) | // units of seconds |
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| 54 | (0 << 15) | // b0 (NTSC), b2 (PAL) |
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| 55 | ((((frame / (fps * 60)) % 60) / 10) << 12) | // tens of minutes |
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| 56 | ((((frame / (fps * 60)) % 60) % 10) << 8) | // units of minutes |
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| 57 | (0 << 7) | // b1 |
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| 58 | (0 << 6) | // b2 (NTSC), field phase (PAL) |
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| 59 | ((((frame / (fps * 3600) % 24)) / 10) << 4) | // tens of hours |
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| 60 | ( (frame / (fps * 3600) % 24)) % 10; // units of hours |
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| 61 | } |
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| 62 | |||
| 63 | int avpriv_check_timecode_rate(void *avcl, AVRational rate, int drop) |
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| 64 | { |
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| 65 | int fps; |
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| 66 | |||
| 67 | if (!rate.num || !rate.den) { |
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| 68 | av_log(avcl, AV_LOG_ERROR, "Timecode frame rate must be specified\n"); |
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| 69 | return -1; |
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| 70 | } |
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| 71 | fps = (rate.num + rate.den/2) / rate.den; |
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| 72 | if (drop && fps != 30) { |
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| 73 | av_log(avcl, AV_LOG_ERROR, "Drop frame is only allowed with 30000/1001 FPS\n"); |
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| 74 | return -2; |
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| 75 | } |
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| 76 | switch (fps) { |
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| 77 | case 24: |
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| 78 | case 25: |
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| 79 | case 30: return 0; |
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| 80 | |||
| 81 | default: |
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| 82 | av_log(avcl, AV_LOG_ERROR, "Timecode frame rate not supported\n"); |
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| 83 | return -3; |
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| 84 | } |
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| 85 | } |
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| 86 | |||
| 87 | char *avpriv_timecode_to_string(char *buf, const struct ff_timecode *tc, unsigned frame) |
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| 88 | { |
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| 89 | int frame_num = tc->start + frame; |
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| 90 | int fps = (tc->rate.num + tc->rate.den/2) / tc->rate.den; |
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| 91 | int hh, mm, ss, ff, neg = 0; |
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| 92 | |||
| 93 | if (tc->drop) |
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| 94 | frame_num = avpriv_framenum_to_drop_timecode(frame_num); |
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| 95 | if (frame_num < 0) { |
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| 96 | frame_num = -frame_num; |
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| 97 | neg = 1; |
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| 98 | } |
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| 99 | ff = frame_num % fps; |
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| 100 | ss = frame_num / fps % 60; |
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| 101 | mm = frame_num / (fps*60) % 60; |
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| 102 | hh = frame_num / (fps*3600); |
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| 103 | snprintf(buf, 16, "%s%02d:%02d:%02d%c%02d", |
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| 104 | neg ? "-" : "", |
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| 105 | hh, mm, ss, tc->drop ? ';' : ':', ff); |
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| 106 | return buf; |
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| 107 | } |
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| 108 | |||
| 109 | int avpriv_init_smpte_timecode(void *avcl, struct ff_timecode *tc) |
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| 110 | { |
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| 111 | int hh, mm, ss, ff, fps, ret; |
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| 112 | char c; |
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| 113 | |||
| 114 | if (sscanf(tc->str, "%d:%d:%d%c%d", &hh, &mm, &ss, &c, &ff) != 5) { |
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| 115 | av_log(avcl, AV_LOG_ERROR, "unable to parse timecode, " |
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| 116 | "syntax: hh:mm:ss[:;.]ff\n"); |
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| 117 | return -1; |
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| 118 | } |
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| 119 | |||
| 120 | tc->drop = c != ':'; // drop if ';', '.', ... |
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| 121 | |||
| 122 | ret = avpriv_check_timecode_rate(avcl, tc->rate, tc->drop); |
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| 123 | if (ret < 0) |
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| 124 | return ret; |
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| 125 | |||
| 126 | fps = (tc->rate.num + tc->rate.den/2) / tc->rate.den; |
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| 127 | tc->start = (hh*3600 + mm*60 + ss) * fps + ff; |
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| 128 | |||
| 129 | if (tc->drop) { /* adjust frame number */ |
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| 130 | int tmins = 60*hh + mm; |
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| 131 | tc->start -= 2 * (tmins - tmins/10); |
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| 132 | } |
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| 133 | return 0; |
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| 134 | } |
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| 135 | |||
| 136 | int ff_framenum_to_drop_timecode(int frame_num) |
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| 137 | { |
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| 138 | return avpriv_framenum_to_drop_timecode(frame_num); |
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| 139 | } |
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| 140 | |||
| 141 | uint32_t ff_framenum_to_smtpe_timecode(unsigned frame, int fps, int drop) |
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| 142 | { |
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| 143 | return avpriv_framenum_to_smpte_timecode(frame, fps, drop); |
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| 144 | } |
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| 145 | |||
| 146 | int ff_init_smtpe_timecode(void *avcl, struct ff_timecode *tc) |
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| 147 | { |
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| 148 | return avpriv_init_smpte_timecode(avcl, tc); |
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| 149 | } |
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| 150 | #endif |