76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
/*
|
|
* 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 General Public
|
|
* License as published by the Free Software Foundation;
|
|
* version 2 of the License.
|
|
*
|
|
* 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
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU 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 header
|
|
*/
|
|
|
|
#ifndef AVCODEC_TIMECODE_H
|
|
#define AVCODEC_TIMECODE_H
|
|
|
|
#include <stdint.h>
|
|
#include "libavutil/rational.h"
|
|
|
|
#define TIMECODE_OPT(ctx, flags) \
|
|
"timecode", "set timecode value following hh:mm:ss[:;.]ff format, " \
|
|
"use ';' or '.' before frame number for drop frame", \
|
|
offsetof(ctx, tc.str), \
|
|
FF_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, flags
|
|
|
|
struct ff_timecode {
|
|
char *str; ///< string following the hh:mm:ss[:;.]ff format
|
|
int start; ///< timecode frame start
|
|
int drop; ///< drop flag (1 if drop, else 0)
|
|
AVRational rate; ///< Frame rate in rationnal form
|
|
};
|
|
|
|
/**
|
|
* @brief Adjust frame number for NTSC drop frame time code
|
|
* @param frame_num Actual frame number to adjust
|
|
* @return Adjusted frame number
|
|
* @warning Adjustment is only valid in NTSC 29.97
|
|
*/
|
|
int ff_framenum_to_drop_timecode(int frame_num);
|
|
|
|
/**
|
|
* @brief Convert frame id (timecode) to SMPTE 12M binary representation
|
|
* @param frame Frame number
|
|
* @param fps Frame rate
|
|
* @param drop Drop flag
|
|
* @return The actual binary representation
|
|
*/
|
|
uint32_t ff_framenum_to_smtpe_timecode(unsigned frame, int fps, int drop);
|
|
|
|
/**
|
|
* Parse SMTPE 12M time representation (hh:mm:ss[:;.]ff). str and rate fields
|
|
* from tc struct must be set.
|
|
*
|
|
* @param avcl A pointer to an arbitrary struct of which the first field is a
|
|
* pointer to an AVClass struct (used for av_log).
|
|
* @param tc Timecode struct pointer
|
|
* @return 0 on success, negative value on failure
|
|
* @warning Adjustement is only valid in NTSC 29.97
|
|
*/
|
|
int ff_init_smtpe_timecode(void *avcl, struct ff_timecode *tc);
|
|
|
|
#endif /* AVCODEC_TIMECODE_H */
|