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/*

 * 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

 */

#ifndef AVUTIL_PARSEUTILS_H

#define AVUTIL_PARSEUTILS_H

#include 

#include "rational.h"

/**

 * @file

 * misc parsing utilities

 */

/**

 * Parse str and store the parsed ratio in q.

 *

 * Note that a ratio with infinite (1/0) or negative value is

 * considered valid, so you should check on the returned value if you

 * want to exclude those values.

 *

 * The undefined value can be expressed using the "0:0" string.

 *

 * @param[in,out] q pointer to the AVRational which will contain the ratio

 * @param[in] str the string to parse: it has to be a string in the format

 * num:den, a float number or an expression

 * @param[in] max the maximum allowed numerator and denominator

 * @param[in] log_offset log level offset which is applied to the log

 * level of log_ctx

 * @param[in] log_ctx parent logging context

 * @return >= 0 on success, a negative error code otherwise

 */

int av_parse_ratio(AVRational *q, const char *str, int max,

                   int log_offset, void *log_ctx);

#define av_parse_ratio_quiet(rate, str, max) \

    av_parse_ratio(rate, str, max, AV_LOG_MAX_OFFSET, NULL)

/**

 * 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);

/**

 * Get the name of a color from the internal table of hard-coded named

 * colors.

 *

 * This function is meant to enumerate the color names recognized by

 * av_parse_color().

 *

 * @param color_idx index of the requested color, starting from 0

 * @param rgbp      if not NULL, will point to a 3-elements array with the color value in RGB

 * @return the color name string or NULL if color_idx is not in the array

 */

const char *av_get_known_color_name(int color_idx, const uint8_t **rgb);

/**

 * Parse timestr and return 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...]]]}|{HHMMSS[.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);

/**

 * Simplified version of strptime

 *

 * Parse the input string p according to the format string fmt and

 * store its results in the structure dt.

 * This implementation supports only a subset of the formats supported

 * by the standard strptime().

 *

 * The supported input field descriptors are listed below.

 * - %H: the hour as a decimal number, using a 24-hour clock, in the

 *   range '00' through '23'

 * - %J: hours as a decimal number, in the range '0' through INT_MAX

 * - %M: the minute as a decimal number, using a 24-hour clock, in the

 *   range '00' through '59'

 * - %S: the second as a decimal number, using a 24-hour clock, in the

 *   range '00' through '59'

 * - %Y: the year as a decimal number, using the Gregorian calendar

 * - %m: the month as a decimal number, in the range '1' through '12'

 * - %d: the day of the month as a decimal number, in the range '1'

 *   through '31'

 * - %T: alias for '%H:%M:%S'

 * - %%: a literal '%'

 *

 * @return a pointer to the first character not processed in this function

 *         call. In case the input string contains more characters than

 *         required by the format string the return value points right after

 *         the last consumed input character. In case the whole input string

 *         is consumed the return value points to the null byte at the end of

 *         the string. On failure NULL is returned.

 */

char *av_small_strptime(const char *p, const char *fmt, struct tm *dt);

/**

 * Convert the decomposed UTC time in tm to a time_t value.

 */

time_t av_timegm(struct tm *tm);

#endif /* AVUTIL_PARSEUTILS_H */