mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-11 09:35:22 +00:00
ae68bb779c
Fixes the following warning: libavutil/timecode.c:103:60: warning: '%02d' directive output may be truncated writing between 2 and 10 bytes into a region of size between 0 and 7
141 lines
5.2 KiB
C
141 lines
5.2 KiB
C
/*
|
|
* Copyright (c) 2006 Smartjog S.A.S, Baptiste Coudurier <baptiste.coudurier@gmail.com>
|
|
* Copyright (c) 2011-2012 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 header
|
|
*/
|
|
|
|
#ifndef AVUTIL_TIMECODE_H
|
|
#define AVUTIL_TIMECODE_H
|
|
|
|
#include <stdint.h>
|
|
#include "rational.h"
|
|
|
|
#define AV_TIMECODE_STR_SIZE 23
|
|
|
|
enum AVTimecodeFlag {
|
|
AV_TIMECODE_FLAG_DROPFRAME = 1<<0, ///< timecode is drop frame
|
|
AV_TIMECODE_FLAG_24HOURSMAX = 1<<1, ///< timecode wraps after 24 hours
|
|
AV_TIMECODE_FLAG_ALLOWNEGATIVE = 1<<2, ///< negative time values are allowed
|
|
};
|
|
|
|
typedef struct {
|
|
int start; ///< timecode frame start (first base frame number)
|
|
uint32_t flags; ///< flags such as drop frame, +24 hours support, ...
|
|
AVRational rate; ///< frame rate in rational form
|
|
unsigned fps; ///< frame per second; must be consistent with the rate field
|
|
} AVTimecode;
|
|
|
|
/**
|
|
* Adjust frame number for NTSC drop frame time code.
|
|
*
|
|
* @param framenum frame number to adjust
|
|
* @param fps frame per second, 30 or 60
|
|
* @return adjusted frame number
|
|
* @warning adjustment is only valid in NTSC 29.97 and 59.94
|
|
*/
|
|
int av_timecode_adjust_ntsc_framenum2(int framenum, int fps);
|
|
|
|
/**
|
|
* Convert frame number to SMPTE 12M binary representation.
|
|
*
|
|
* @param tc timecode data correctly initialized
|
|
* @param framenum frame number
|
|
* @return the SMPTE binary representation
|
|
*
|
|
* @note Frame number adjustment is automatically done in case of drop timecode,
|
|
* you do NOT have to call av_timecode_adjust_ntsc_framenum2().
|
|
* @note The frame number is relative to tc->start.
|
|
* @note Color frame (CF), binary group flags (BGF) and biphase mark polarity
|
|
* correction (PC) bits are set to zero.
|
|
*/
|
|
uint32_t av_timecode_get_smpte_from_framenum(const AVTimecode *tc, int framenum);
|
|
|
|
/**
|
|
* Load timecode string in buf.
|
|
*
|
|
* @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long
|
|
* @param tc timecode data correctly initialized
|
|
* @param framenum frame number
|
|
* @return the buf parameter
|
|
*
|
|
* @note Timecode representation can be a negative timecode and have more than
|
|
* 24 hours, but will only be honored if the flags are correctly set.
|
|
* @note The frame number is relative to tc->start.
|
|
*/
|
|
char *av_timecode_make_string(const AVTimecode *tc, char *buf, int framenum);
|
|
|
|
/**
|
|
* Get the timecode string from the SMPTE timecode format.
|
|
*
|
|
* @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long
|
|
* @param tcsmpte the 32-bit SMPTE timecode
|
|
* @param prevent_df prevent the use of a drop flag when it is known the DF bit
|
|
* is arbitrary
|
|
* @return the buf parameter
|
|
*/
|
|
char *av_timecode_make_smpte_tc_string(char *buf, uint32_t tcsmpte, int prevent_df);
|
|
|
|
/**
|
|
* Get the timecode string from the 25-bit timecode format (MPEG GOP format).
|
|
*
|
|
* @param buf destination buffer, must be at least AV_TIMECODE_STR_SIZE long
|
|
* @param tc25bit the 25-bits timecode
|
|
* @return the buf parameter
|
|
*/
|
|
char *av_timecode_make_mpeg_tc_string(char *buf, uint32_t tc25bit);
|
|
|
|
/**
|
|
* Init a timecode struct with the passed parameters.
|
|
*
|
|
* @param log_ctx a pointer to an arbitrary struct of which the first field
|
|
* is a pointer to an AVClass struct (used for av_log)
|
|
* @param tc pointer to an allocated AVTimecode
|
|
* @param rate frame rate in rational form
|
|
* @param flags miscellaneous flags such as drop frame, +24 hours, ...
|
|
* (see AVTimecodeFlag)
|
|
* @param frame_start the first frame number
|
|
* @return 0 on success, AVERROR otherwise
|
|
*/
|
|
int av_timecode_init(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx);
|
|
|
|
/**
|
|
* Parse timecode representation (hh:mm:ss[:;.]ff).
|
|
*
|
|
* @param log_ctx a pointer to an arbitrary struct of which the first field is a
|
|
* pointer to an AVClass struct (used for av_log).
|
|
* @param tc pointer to an allocated AVTimecode
|
|
* @param rate frame rate in rational form
|
|
* @param str timecode string which will determine the frame start
|
|
* @return 0 on success, AVERROR otherwise
|
|
*/
|
|
int av_timecode_init_from_string(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx);
|
|
|
|
/**
|
|
* Check if the timecode feature is available for the given frame rate
|
|
*
|
|
* @return 0 if supported, <0 otherwise
|
|
*/
|
|
int av_timecode_check_frame_rate(AVRational rate);
|
|
|
|
#endif /* AVUTIL_TIMECODE_H */
|