/* * 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