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Open Source Computer Vision Library
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124 lines
4.5 KiB
124 lines
4.5 KiB
/* |
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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 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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* 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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* 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 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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#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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* Parse timestr and return 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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