| /* |
| * Copyright (C) 2006 Smartjog S.A.S, Baptiste Coudurier <baptiste.coudurier@gmail.com> |
| * Copyright (C) 2011 Smartjog S.A.S, Clément Bœsch <clement.boesch@smartjog.com> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /** |
| * @file |
| * Timecode helpers |
| * This *private* API is deprecated, please use the one available in libavutil instead. |
| */ |
| |
| #include "version.h" |
| |
| #if FF_API_OLD_TIMECODE |
| |
| #include <stdio.h> |
| #include "timecode.h" |
| #include "libavutil/log.h" |
| |
| int avpriv_framenum_to_drop_timecode(int frame_num) |
| { |
| /* only works for NTSC 29.97 */ |
| int d = frame_num / 17982; |
| int m = frame_num % 17982; |
| //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */ |
| return frame_num + 18 * d + 2 * ((m - 2) / 1798); |
| } |
| |
| uint32_t avpriv_framenum_to_smpte_timecode(unsigned frame, int fps, int drop) |
| { |
| return (0 << 31) | // color frame flag |
| (drop << 30) | // drop frame flag |
| ( ((frame % fps) / 10) << 28) | // tens of frames |
| ( ((frame % fps) % 10) << 24) | // units of frames |
| (0 << 23) | // field phase (NTSC), b0 (PAL) |
| ((((frame / fps) % 60) / 10) << 20) | // tens of seconds |
| ((((frame / fps) % 60) % 10) << 16) | // units of seconds |
| (0 << 15) | // b0 (NTSC), b2 (PAL) |
| ((((frame / (fps * 60)) % 60) / 10) << 12) | // tens of minutes |
| ((((frame / (fps * 60)) % 60) % 10) << 8) | // units of minutes |
| (0 << 7) | // b1 |
| (0 << 6) | // b2 (NTSC), field phase (PAL) |
| ((((frame / (fps * 3600) % 24)) / 10) << 4) | // tens of hours |
| ( (frame / (fps * 3600) % 24)) % 10; // units of hours |
| } |
| |
| int avpriv_check_timecode_rate(void *avcl, AVRational rate, int drop) |
| { |
| int fps; |
| |
| if (!rate.num || !rate.den) { |
| av_log(avcl, AV_LOG_ERROR, "Timecode frame rate must be specified\n"); |
| return -1; |
| } |
| fps = (rate.num + rate.den/2) / rate.den; |
| if (drop && fps != 30) { |
| av_log(avcl, AV_LOG_ERROR, "Drop frame is only allowed with 30000/1001 FPS\n"); |
| return -2; |
| } |
| switch (fps) { |
| case 24: |
| case 25: |
| case 30: return 0; |
| |
| default: |
| av_log(avcl, AV_LOG_ERROR, "Timecode frame rate not supported\n"); |
| return -3; |
| } |
| } |
| |
| char *avpriv_timecode_to_string(char *buf, const struct ff_timecode *tc, unsigned frame) |
| { |
| int frame_num = tc->start + frame; |
| int fps = (tc->rate.num + tc->rate.den/2) / tc->rate.den; |
| int hh, mm, ss, ff, neg = 0; |
| |
| if (tc->drop) |
| frame_num = avpriv_framenum_to_drop_timecode(frame_num); |
| if (frame_num < 0) { |
| frame_num = -frame_num; |
| neg = 1; |
| } |
| ff = frame_num % fps; |
| ss = frame_num / fps % 60; |
| mm = frame_num / (fps*60) % 60; |
| hh = frame_num / (fps*3600); |
| snprintf(buf, 16, "%s%02d:%02d:%02d%c%02d", |
| neg ? "-" : "", |
| hh, mm, ss, tc->drop ? ';' : ':', ff); |
| return buf; |
| } |
| |
| int avpriv_init_smpte_timecode(void *avcl, struct ff_timecode *tc) |
| { |
| int hh, mm, ss, ff, fps, ret; |
| char c; |
| |
| if (sscanf(tc->str, "%d:%d:%d%c%d", &hh, &mm, &ss, &c, &ff) != 5) { |
| av_log(avcl, AV_LOG_ERROR, "unable to parse timecode, " |
| "syntax: hh:mm:ss[:;.]ff\n"); |
| return -1; |
| } |
| |
| tc->drop = c != ':'; // drop if ';', '.', ... |
| |
| ret = avpriv_check_timecode_rate(avcl, tc->rate, tc->drop); |
| if (ret < 0) |
| return ret; |
| |
| fps = (tc->rate.num + tc->rate.den/2) / tc->rate.den; |
| tc->start = (hh*3600 + mm*60 + ss) * fps + ff; |
| |
| if (tc->drop) { /* adjust frame number */ |
| int tmins = 60*hh + mm; |
| tc->start -= 2 * (tmins - tmins/10); |
| } |
| return 0; |
| } |
| |
| int ff_framenum_to_drop_timecode(int frame_num) |
| { |
| return avpriv_framenum_to_drop_timecode(frame_num); |
| } |
| |
| uint32_t ff_framenum_to_smtpe_timecode(unsigned frame, int fps, int drop) |
| { |
| return avpriv_framenum_to_smpte_timecode(frame, fps, drop); |
| } |
| |
| int ff_init_smtpe_timecode(void *avcl, struct ff_timecode *tc) |
| { |
| return avpriv_init_smpte_timecode(avcl, tc); |
| } |
| #endif |