mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-27 21:20:41 +00:00
118 lines
4.4 KiB
C
118 lines
4.4 KiB
C
/*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVUTIL_PARSEUTILS_H
|
|
#define AVUTIL_PARSEUTILS_H
|
|
|
|
#include "rational.h"
|
|
|
|
/**
|
|
* @file
|
|
* misc parsing utilities
|
|
*/
|
|
|
|
/**
|
|
* Parse str and put in width_ptr and height_ptr the detected values.
|
|
*
|
|
* @param[in,out] width_ptr pointer to the variable which will contain the detected
|
|
* width value
|
|
* @param[in,out] height_ptr pointer to the variable which will contain the detected
|
|
* height value
|
|
* @param[in] str the string to parse: it has to be a string in the format
|
|
* width x height or a valid video size abbreviation.
|
|
* @return >= 0 on success, a negative error code otherwise
|
|
*/
|
|
int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str);
|
|
|
|
/**
|
|
* Parse str and store the detected values in *rate.
|
|
*
|
|
* @param[in,out] rate pointer to the AVRational which will contain the detected
|
|
* frame rate
|
|
* @param[in] str the string to parse: it has to be a string in the format
|
|
* rate_num / rate_den, a float number or a valid video rate abbreviation
|
|
* @return >= 0 on success, a negative error code otherwise
|
|
*/
|
|
int av_parse_video_rate(AVRational *rate, const char *str);
|
|
|
|
/**
|
|
* Put the RGBA values that correspond to color_string in rgba_color.
|
|
*
|
|
* @param color_string a string specifying a color. It can be the name of
|
|
* a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
|
|
* possibly followed by "@" and a string representing the alpha
|
|
* component.
|
|
* The alpha component may be a string composed by "0x" followed by an
|
|
* hexadecimal number or a decimal number between 0.0 and 1.0, which
|
|
* represents the opacity value (0x00/0.0 means completely transparent,
|
|
* 0xff/1.0 completely opaque).
|
|
* If the alpha component is not specified then 0xff is assumed.
|
|
* The string "random" will result in a random color.
|
|
* @param slen length of the initial part of color_string containing the
|
|
* color. It can be set to -1 if color_string is a null terminated string
|
|
* containing nothing else than the color.
|
|
* @return >= 0 in case of success, a negative value in case of
|
|
* failure (for example if color_string cannot be parsed).
|
|
*/
|
|
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
|
|
void *log_ctx);
|
|
|
|
/**
|
|
* Parses timestr and returns in *time a corresponding number of
|
|
* microseconds.
|
|
*
|
|
* @param timeval puts here the number of microseconds corresponding
|
|
* to the string in timestr. If the string represents a duration, it
|
|
* is the number of microseconds contained in the time interval. If
|
|
* the string is a date, is the number of microseconds since 1st of
|
|
* January, 1970 up to the time of the parsed date. If timestr cannot
|
|
* be successfully parsed, set *time to INT64_MIN.
|
|
|
|
* @param timestr a string representing a date or a duration.
|
|
* - If a date the syntax is:
|
|
* @code
|
|
* [{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH[:MM[:SS[.m...]]]}|{HH[MM[SS[.m...]]]}}[Z]
|
|
* now
|
|
* @endcode
|
|
* If the value is "now" it takes the current time.
|
|
* Time is local time unless Z is appended, in which case it is
|
|
* interpreted as UTC.
|
|
* If the year-month-day part is not specified it takes the current
|
|
* year-month-day.
|
|
* - If a duration the syntax is:
|
|
* @code
|
|
* [-]HH[:MM[:SS[.m...]]]
|
|
* [-]S+[.m...]
|
|
* @endcode
|
|
* @param duration flag which tells how to interpret timestr, if not
|
|
* zero timestr is interpreted as a duration, otherwise as a date
|
|
* @return 0 in case of success, a negative value corresponding to an
|
|
* AVERROR code otherwise
|
|
*/
|
|
int av_parse_time(int64_t *timeval, const char *timestr, int duration);
|
|
|
|
/**
|
|
* Attempt to find a specific tag in a URL.
|
|
*
|
|
* syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
|
|
* Return 1 if found.
|
|
*/
|
|
int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
|
|
|
|
#endif /* AVUTIL_PARSEUTILS_H */
|