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