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66 lines
2.4 KiB
66 lines
2.4 KiB
/* |
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* Copyright (C) 2006 Smartjog S.A.S, Baptiste Coudurier <baptiste.coudurier@gmail.com> |
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* Copyright (C) 2011 Smartjog S.A.S, Clément Bœsch <clement.boesch@smartjog.com> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public |
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* License as published by the Free Software Foundation; |
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* version 2 of the License. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* Timecode helpers header |
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*/ |
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#ifndef AVCODEC_TIMECODE_H |
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#define AVCODEC_TIMECODE_H |
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#include <stdint.h> |
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#include "libavutil/rational.h" |
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#define TIMECODE_OPT(ctx, flags) \ |
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"timecode", "set timecode value following hh:mm:ss[:;.]ff format, " \ |
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"use ';' or '.' before frame number for drop frame", \ |
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offsetof(ctx, tc.str), \ |
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FF_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, flags |
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struct ff_timecode { |
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char *str; ///< string following the hh:mm:ss[:;.]ff format |
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int start; ///< timecode frame start |
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int drop; ///< drop flag (1 if drop, else 0) |
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AVRational rate; ///< Frame rate in rationnal form |
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}; |
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/** |
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* @brief Adjust frame number for NTSC drop frame time code |
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* @param frame_num Actual frame number to adjust |
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* @return Adjusted frame number |
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* @warning Adjustment is only valid in NTSC 29.97 |
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*/ |
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int ff_framenum_to_drop_timecode(int frame_num); |
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/** |
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* Parse SMTPE 12M time representation (hh:mm:ss[:;.]ff). str and rate fields |
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* from tc struct must be set. |
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* |
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* @param avcl A pointer to an arbitrary struct of which the first field is a |
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* pointer to an AVClass struct (used for av_log). |
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* @param tc Timecode struct pointer |
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* @return 0 on success, negative value on failure |
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* @warning Adjustement is only valid in NTSC 29.97 |
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*/ |
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int ff_init_smtpe_timecode(void *avcl, struct ff_timecode *tc); |
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#endif /* AVCODEC_TIMECODE_H */
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