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627067118c
This is useful, since the normal timegm function isn't a standard function (requiring _BSD_SOURCE or _SVID_SOURCE on glibc to be visible, and not available on e.g. windows). The widely available function mktime uses the local time zone, which requires ugly workarounds to handle UTC time. Signed-off-by: Martin Storsjö <martin@martin.st>
125 lines
4.5 KiB
C
125 lines
4.5 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; 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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#ifndef AVUTIL_PARSEUTILS_H
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#define AVUTIL_PARSEUTILS_H
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#include <time.h>
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#include "rational.h"
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/**
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* @file
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* misc parsing utilities
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*/
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/**
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* Parse str and put in width_ptr and height_ptr the detected values.
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*
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* @param[in,out] width_ptr pointer to the variable which will contain the detected
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* width value
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* @param[in,out] height_ptr pointer to the variable which will contain the detected
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* height value
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* @param[in] str the string to parse: it has to be a string in the format
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* width x height or a valid video size abbreviation.
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* @return >= 0 on success, a negative error code otherwise
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*/
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int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str);
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/**
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* Parse str and store the detected values in *rate.
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*
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* @param[in,out] rate pointer to the AVRational which will contain the detected
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* frame rate
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* @param[in] str the string to parse: it has to be a string in the format
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* rate_num / rate_den, a float number or a valid video rate abbreviation
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* @return >= 0 on success, a negative error code otherwise
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*/
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int av_parse_video_rate(AVRational *rate, const char *str);
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/**
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* Put the RGBA values that correspond to color_string in rgba_color.
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*
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* @param color_string a string specifying a color. It can be the name of
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* a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
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* possibly followed by "@" and a string representing the alpha
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* component.
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* The alpha component may be a string composed by "0x" followed by an
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* hexadecimal number or a decimal number between 0.0 and 1.0, which
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* represents the opacity value (0x00/0.0 means completely transparent,
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* 0xff/1.0 completely opaque).
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* If the alpha component is not specified then 0xff is assumed.
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* The string "random" will result in a random color.
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* @param slen length of the initial part of color_string containing the
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* color. It can be set to -1 if color_string is a null terminated string
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* containing nothing else than the color.
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* @return >= 0 in case of success, a negative value in case of
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* failure (for example if color_string cannot be parsed).
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*/
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int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
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void *log_ctx);
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/**
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* Parses timestr and returns in *time a corresponding number of
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* microseconds.
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*
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* @param timeval puts here the number of microseconds corresponding
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* to the string in timestr. If the string represents a duration, it
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* is the number of microseconds contained in the time interval. If
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* the string is a date, is the number of microseconds since 1st of
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* January, 1970 up to the time of the parsed date. If timestr cannot
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* be successfully parsed, set *time to INT64_MIN.
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* @param timestr a string representing a date or a duration.
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* - If a date the syntax is:
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* @code
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* [{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH[:MM[:SS[.m...]]]}|{HH[MM[SS[.m...]]]}}[Z]
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* now
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* @endcode
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* If the value is "now" it takes the current time.
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* Time is local time unless Z is appended, in which case it is
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* interpreted as UTC.
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* If the year-month-day part is not specified it takes the current
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* year-month-day.
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* - If a duration the syntax is:
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* @code
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* [-]HH[:MM[:SS[.m...]]]
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* [-]S+[.m...]
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* @endcode
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* @param duration flag which tells how to interpret timestr, if not
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* zero timestr is interpreted as a duration, otherwise as a date
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* @return 0 in case of success, a negative value corresponding to an
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* AVERROR code otherwise
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*/
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int av_parse_time(int64_t *timeval, const char *timestr, int duration);
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/**
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* Attempt to find a specific tag in a URL.
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*
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* syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
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* Return 1 if found.
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*/
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int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
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/**
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* Convert the decomposed UTC time in tm to a time_t value.
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*/
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time_t av_timegm(struct tm *tm);
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#endif /* AVUTIL_PARSEUTILS_H */
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