2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef AVUTIL_PARSEUTILS_H
20 #define AVUTIL_PARSEUTILS_H
28 * misc parsing utilities
32 * Parse str and store the parsed ratio in q.
34 * Note that a ratio with infinite (1/0) or negative value is
35 * considered valid, so you should check on the returned value if you
36 * want to exclude those values.
38 * The undefined value can be expressed using the "0:0" string.
40 * @param[in,out] q pointer to the AVRational which will contain the ratio
41 * @param[in] str the string to parse: it has to be a string in the format
42 * num:den, a float number or an expression
43 * @param[in] max the maximum allowed numerator and denominator
44 * @param[in] log_offset log level offset which is applied to the log
46 * @param[in] log_ctx parent logging context
47 * @return >= 0 on success, a negative error code otherwise
49 int av_parse_ratio(AVRational *q, const char *str, int max,
50 int log_offset, void *log_ctx);
52 #define av_parse_ratio_quiet(rate, str, max) \
53 av_parse_ratio(rate, str, max, AV_LOG_MAX_OFFSET, NULL)
56 * Parse str and put in width_ptr and height_ptr the detected values.
58 * @param[in,out] width_ptr pointer to the variable which will contain the detected
60 * @param[in,out] height_ptr pointer to the variable which will contain the detected
62 * @param[in] str the string to parse: it has to be a string in the format
63 * width x height or a valid video size abbreviation.
64 * @return >= 0 on success, a negative error code otherwise
66 int av_parse_video_size(int *width_ptr, int *height_ptr, const char *str);
69 * Parse str and store the detected values in *rate.
71 * @param[in,out] rate pointer to the AVRational which will contain the detected
73 * @param[in] str the string to parse: it has to be a string in the format
74 * rate_num / rate_den, a float number or a valid video rate abbreviation
75 * @return >= 0 on success, a negative error code otherwise
77 int av_parse_video_rate(AVRational *rate, const char *str);
80 * Put the RGBA values that correspond to color_string in rgba_color.
82 * @param color_string a string specifying a color. It can be the name of
83 * a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,
84 * possibly followed by "@" and a string representing the alpha
86 * The alpha component may be a string composed by "0x" followed by an
87 * hexadecimal number or a decimal number between 0.0 and 1.0, which
88 * represents the opacity value (0x00/0.0 means completely transparent,
89 * 0xff/1.0 completely opaque).
90 * If the alpha component is not specified then 0xff is assumed.
91 * The string "random" will result in a random color.
92 * @param slen length of the initial part of color_string containing the
93 * color. It can be set to -1 if color_string is a null terminated string
94 * containing nothing else than the color.
95 * @return >= 0 in case of success, a negative value in case of
96 * failure (for example if color_string cannot be parsed).
98 int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen,
102 * Get the name of a color from the internal table of hard-coded named
105 * This function is meant to enumerate the color names recognized by
108 * @param color_idx index of the requested color, starting from 0
109 * @param rgbp if not NULL, will point to a 3-elements array with the color value in RGB
110 * @return the color name string or NULL if color_idx is not in the array
112 const char *av_get_known_color_name(int color_idx, const uint8_t **rgb);
115 * Parse timestr and return in *time a corresponding number of
118 * @param timeval puts here the number of microseconds corresponding
119 * to the string in timestr. If the string represents a duration, it
120 * is the number of microseconds contained in the time interval. If
121 * the string is a date, is the number of microseconds since 1st of
122 * January, 1970 up to the time of the parsed date. If timestr cannot
123 * be successfully parsed, set *time to INT64_MIN.
125 * @param timestr a string representing a date or a duration.
126 * - If a date the syntax is:
128 * [{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH:MM:SS[.m...]]]}|{HHMMSS[.m...]]]}}[Z]
131 * If the value is "now" it takes the current time.
132 * Time is local time unless Z is appended, in which case it is
133 * interpreted as UTC.
134 * If the year-month-day part is not specified it takes the current
136 * - If a duration the syntax is:
138 * [-][HH:]MM:SS[.m...]
141 * @param duration flag which tells how to interpret timestr, if not
142 * zero timestr is interpreted as a duration, otherwise as a date
143 * @return >= 0 in case of success, a negative value corresponding to an
144 * AVERROR code otherwise
146 int av_parse_time(int64_t *timeval, const char *timestr, int duration);
149 * Attempt to find a specific tag in a URL.
151 * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.
154 int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info);
157 * Simplified version of strptime
159 * Parse the input string p according to the format string fmt and
160 * store its results in the structure dt.
161 * This implementation supports only a subset of the formats supported
162 * by the standard strptime().
164 * The supported input field descriptors are listed below.
165 * - %H: the hour as a decimal number, using a 24-hour clock, in the
166 * range '00' through '23'
167 * - %J: hours as a decimal number, in the range '0' through INT_MAX
168 * - %M: the minute as a decimal number, using a 24-hour clock, in the
169 * range '00' through '59'
170 * - %S: the second as a decimal number, using a 24-hour clock, in the
171 * range '00' through '59'
172 * - %Y: the year as a decimal number, using the Gregorian calendar
173 * - %m: the month as a decimal number, in the range '1' through '12'
174 * - %d: the day of the month as a decimal number, in the range '1'
176 * - %T: alias for '%H:%M:%S'
177 * - %%: a literal '%'
179 * @return a pointer to the first character not processed in this function
180 * call. In case the input string contains more characters than
181 * required by the format string the return value points right after
182 * the last consumed input character. In case the whole input string
183 * is consumed the return value points to the null byte at the end of
184 * the string. On failure NULL is returned.
186 char *av_small_strptime(const char *p, const char *fmt, struct tm *dt);
189 * Convert the decomposed UTC time in tm to a time_t value.
191 time_t av_timegm(struct tm *tm);
193 #endif /* AVUTIL_PARSEUTILS_H */