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<a href="parseutils_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * This file is part of FFmpeg.</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span>
<a name="l00005"></a>00005 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00006"></a>00006 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00007"></a>00007 <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00008"></a>00008 <span class="comment"> *</span>
<a name="l00009"></a>00009 <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span>
<a name="l00010"></a>00010 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00011"></a>00011 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00012"></a>00012 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00013"></a>00013 <span class="comment"> *</span>
<a name="l00014"></a>00014 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
<a name="l00015"></a>00015 <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span>
<a name="l00016"></a>00016 <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00017"></a>00017 <span class="comment"> */</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#ifndef AVUTIL_PARSEUTILS_H</span>
<a name="l00020"></a>00020 <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_PARSEUTILS_H</span>
<a name="l00021"></a>00021 <span class="preprocessor"></span>
<a name="l00022"></a>00022 <span class="preprocessor">#include <<a class="code" href="time_8h.html">time.h</a>></span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="rational_8h.html" title="rational numbers">rational.h</a>"</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">/**</span>
<a name="l00027"></a>00027 <span class="comment"> * @file</span>
<a name="l00028"></a>00028 <span class="comment"> * misc parsing utilities</span>
<a name="l00029"></a>00029 <span class="comment"> */</span>
<a name="l00030"></a>00030 <span class="comment"></span>
<a name="l00031"></a>00031 <span class="comment">/**</span>
<a name="l00032"></a>00032 <span class="comment"> * Parse str and store the parsed ratio in q.</span>
<a name="l00033"></a>00033 <span class="comment"> *</span>
<a name="l00034"></a>00034 <span class="comment"> * Note that a ratio with infinite (1/0) or negative value is</span>
<a name="l00035"></a>00035 <span class="comment"> * considered valid, so you should check on the returned value if you</span>
<a name="l00036"></a>00036 <span class="comment"> * want to exclude those values.</span>
<a name="l00037"></a>00037 <span class="comment"> *</span>
<a name="l00038"></a>00038 <span class="comment"> * The undefined value can be expressed using the "0:0" string.</span>
<a name="l00039"></a>00039 <span class="comment"> *</span>
<a name="l00040"></a>00040 <span class="comment"> * @param[in,out] q pointer to the AVRational which will contain the ratio</span>
<a name="l00041"></a>00041 <span class="comment"> * @param[in] str the string to parse: it has to be a string in the format</span>
<a name="l00042"></a>00042 <span class="comment"> * num:den, a float number or an expression</span>
<a name="l00043"></a>00043 <span class="comment"> * @param[in] max the maximum allowed numerator and denominator</span>
<a name="l00044"></a>00044 <span class="comment"> * @param[in] log_offset log level offset which is applied to the log</span>
<a name="l00045"></a>00045 <span class="comment"> * level of log_ctx</span>
<a name="l00046"></a>00046 <span class="comment"> * @param[in] log_ctx parent logging context</span>
<a name="l00047"></a>00047 <span class="comment"> * @return >= 0 on success, a negative error code otherwise</span>
<a name="l00048"></a>00048 <span class="comment"> */</span>
<a name="l00049"></a>00049 <span class="keywordtype">int</span> <a class="code" href="parseutils_8h.html#a8535b8693aa5a188cfb1356133c0e94e" title="Parse str and store the parsed ratio in q.">av_parse_ratio</a>(<a class="code" href="structAVRational.html" title="rational number numerator/denominator">AVRational</a> *q, <span class="keyword">const</span> <span class="keywordtype">char</span> *str, <span class="keywordtype">int</span> max,
<a name="l00050"></a>00050 <span class="keywordtype">int</span> log_offset, <span class="keywordtype">void</span> *log_ctx);
<a name="l00051"></a>00051
<a name="l00052"></a><a class="code" href="parseutils_8h.html#a8ac8244d56fd4eeb9557038f80d60560">00052</a> <span class="preprocessor">#define av_parse_ratio_quiet(rate, str, max) \</span>
<a name="l00053"></a>00053 <span class="preprocessor"> av_parse_ratio(rate, str, max, AV_LOG_MAX_OFFSET, NULL)</span>
<a name="l00054"></a>00054 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00055"></a>00055 <span class="comment">/**</span>
<a name="l00056"></a>00056 <span class="comment"> * Parse str and put in width_ptr and height_ptr the detected values.</span>
<a name="l00057"></a>00057 <span class="comment"> *</span>
<a name="l00058"></a>00058 <span class="comment"> * @param[in,out] width_ptr pointer to the variable which will contain the detected</span>
<a name="l00059"></a>00059 <span class="comment"> * width value</span>
<a name="l00060"></a>00060 <span class="comment"> * @param[in,out] height_ptr pointer to the variable which will contain the detected</span>
<a name="l00061"></a>00061 <span class="comment"> * height value</span>
<a name="l00062"></a>00062 <span class="comment"> * @param[in] str the string to parse: it has to be a string in the format</span>
<a name="l00063"></a>00063 <span class="comment"> * width x height or a valid video size abbreviation.</span>
<a name="l00064"></a>00064 <span class="comment"> * @return >= 0 on success, a negative error code otherwise</span>
<a name="l00065"></a>00065 <span class="comment"> */</span>
<a name="l00066"></a>00066 <span class="keywordtype">int</span> <a class="code" href="parseutils_8h.html#a4dcdb8a2792f2074ca4a1e1f4ddce2bf" title="Parse str and put in width_ptr and height_ptr the detected values.">av_parse_video_size</a>(<span class="keywordtype">int</span> *width_ptr, <span class="keywordtype">int</span> *height_ptr, <span class="keyword">const</span> <span class="keywordtype">char</span> *str);
<a name="l00067"></a>00067 <span class="comment"></span>
<a name="l00068"></a>00068 <span class="comment">/**</span>
<a name="l00069"></a>00069 <span class="comment"> * Parse str and store the detected values in *rate.</span>
<a name="l00070"></a>00070 <span class="comment"> *</span>
<a name="l00071"></a>00071 <span class="comment"> * @param[in,out] rate pointer to the AVRational which will contain the detected</span>
<a name="l00072"></a>00072 <span class="comment"> * frame rate</span>
<a name="l00073"></a>00073 <span class="comment"> * @param[in] str the string to parse: it has to be a string in the format</span>
<a name="l00074"></a>00074 <span class="comment"> * rate_num / rate_den, a float number or a valid video rate abbreviation</span>
<a name="l00075"></a>00075 <span class="comment"> * @return >= 0 on success, a negative error code otherwise</span>
<a name="l00076"></a>00076 <span class="comment"> */</span>
<a name="l00077"></a>00077 <span class="keywordtype">int</span> <a class="code" href="parseutils_8h.html#abbc4de8c071538f5bbde8e5b7466b676" title="Parse str and store the detected values in *rate.">av_parse_video_rate</a>(<a class="code" href="structAVRational.html" title="rational number numerator/denominator">AVRational</a> *rate, <span class="keyword">const</span> <span class="keywordtype">char</span> *str);
<a name="l00078"></a>00078 <span class="comment"></span>
<a name="l00079"></a>00079 <span class="comment">/**</span>
<a name="l00080"></a>00080 <span class="comment"> * Put the RGBA values that correspond to color_string in rgba_color.</span>
<a name="l00081"></a>00081 <span class="comment"> *</span>
<a name="l00082"></a>00082 <span class="comment"> * @param color_string a string specifying a color. It can be the name of</span>
<a name="l00083"></a>00083 <span class="comment"> * a color (case insensitive match) or a [0x|#]RRGGBB[AA] sequence,</span>
<a name="l00084"></a>00084 <span class="comment"> * possibly followed by "@" and a string representing the alpha</span>
<a name="l00085"></a>00085 <span class="comment"> * component.</span>
<a name="l00086"></a>00086 <span class="comment"> * The alpha component may be a string composed by "0x" followed by an</span>
<a name="l00087"></a>00087 <span class="comment"> * hexadecimal number or a decimal number between 0.0 and 1.0, which</span>
<a name="l00088"></a>00088 <span class="comment"> * represents the opacity value (0x00/0.0 means completely transparent,</span>
<a name="l00089"></a>00089 <span class="comment"> * 0xff/1.0 completely opaque).</span>
<a name="l00090"></a>00090 <span class="comment"> * If the alpha component is not specified then 0xff is assumed.</span>
<a name="l00091"></a>00091 <span class="comment"> * The string "random" will result in a random color.</span>
<a name="l00092"></a>00092 <span class="comment"> * @param slen length of the initial part of color_string containing the</span>
<a name="l00093"></a>00093 <span class="comment"> * color. It can be set to -1 if color_string is a null terminated string</span>
<a name="l00094"></a>00094 <span class="comment"> * containing nothing else than the color.</span>
<a name="l00095"></a>00095 <span class="comment"> * @return >= 0 in case of success, a negative value in case of</span>
<a name="l00096"></a>00096 <span class="comment"> * failure (for example if color_string cannot be parsed).</span>
<a name="l00097"></a>00097 <span class="comment"> */</span>
<a name="l00098"></a>00098 <span class="keywordtype">int</span> <a class="code" href="parseutils_8h.html#a4be8779c7c2afd9c57c8b962bea76d03" title="Put the RGBA values that correspond to color_string in rgba_color.">av_parse_color</a>(uint8_t *rgba_color, <span class="keyword">const</span> <span class="keywordtype">char</span> *color_string, <span class="keywordtype">int</span> slen,
<a name="l00099"></a>00099 <span class="keywordtype">void</span> *log_ctx);
<a name="l00100"></a>00100 <span class="comment"></span>
<a name="l00101"></a>00101 <span class="comment">/**</span>
<a name="l00102"></a>00102 <span class="comment"> * Get the name of a color from the internal table of hard-coded named</span>
<a name="l00103"></a>00103 <span class="comment"> * colors.</span>
<a name="l00104"></a>00104 <span class="comment"> *</span>
<a name="l00105"></a>00105 <span class="comment"> * This function is meant to enumerate the color names recognized by</span>
<a name="l00106"></a>00106 <span class="comment"> * av_parse_color().</span>
<a name="l00107"></a>00107 <span class="comment"> *</span>
<a name="l00108"></a>00108 <span class="comment"> * @param color_idx index of the requested color, starting from 0</span>
<a name="l00109"></a>00109 <span class="comment"> * @param rgbp if not NULL, will point to a 3-elements array with the color value in RGB</span>
<a name="l00110"></a>00110 <span class="comment"> * @return the color name string or NULL if color_idx is not in the array</span>
<a name="l00111"></a>00111 <span class="comment"> */</span>
<a name="l00112"></a>00112 <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="parseutils_8h.html#a138ca9f3643dfffbf9737b1f44ad27e3" title="Get the name of a color from the internal table of hard-coded named colors.">av_get_known_color_name</a>(<span class="keywordtype">int</span> color_idx, <span class="keyword">const</span> uint8_t **rgb);
<a name="l00113"></a>00113 <span class="comment"></span>
<a name="l00114"></a>00114 <span class="comment">/**</span>
<a name="l00115"></a>00115 <span class="comment"> * Parse timestr and return in *time a corresponding number of</span>
<a name="l00116"></a>00116 <span class="comment"> * microseconds.</span>
<a name="l00117"></a>00117 <span class="comment"> *</span>
<a name="l00118"></a>00118 <span class="comment"> * @param timeval puts here the number of microseconds corresponding</span>
<a name="l00119"></a>00119 <span class="comment"> * to the string in timestr. If the string represents a duration, it</span>
<a name="l00120"></a>00120 <span class="comment"> * is the number of microseconds contained in the time interval. If</span>
<a name="l00121"></a>00121 <span class="comment"> * the string is a date, is the number of microseconds since 1st of</span>
<a name="l00122"></a>00122 <span class="comment"> * January, 1970 up to the time of the parsed date. If timestr cannot</span>
<a name="l00123"></a>00123 <span class="comment"> * be successfully parsed, set *time to INT64_MIN.</span>
<a name="l00124"></a>00124 <span class="comment"></span>
<a name="l00125"></a>00125 <span class="comment"> * @param timestr a string representing a date or a duration.</span>
<a name="l00126"></a>00126 <span class="comment"> * - If a date the syntax is:</span>
<a name="l00127"></a>00127 <span class="comment"> * @code</span>
<a name="l00128"></a>00128 <span class="comment"> * [{YYYY-MM-DD|YYYYMMDD}[T|t| ]]{{HH:MM:SS[.m...]]]}|{HHMMSS[.m...]]]}}[Z]</span>
<a name="l00129"></a>00129 <span class="comment"> * now</span>
<a name="l00130"></a>00130 <span class="comment"> * @endcode</span>
<a name="l00131"></a>00131 <span class="comment"> * If the value is "now" it takes the current time.</span>
<a name="l00132"></a>00132 <span class="comment"> * Time is local time unless Z is appended, in which case it is</span>
<a name="l00133"></a>00133 <span class="comment"> * interpreted as UTC.</span>
<a name="l00134"></a>00134 <span class="comment"> * If the year-month-day part is not specified it takes the current</span>
<a name="l00135"></a>00135 <span class="comment"> * year-month-day.</span>
<a name="l00136"></a>00136 <span class="comment"> * - If a duration the syntax is:</span>
<a name="l00137"></a>00137 <span class="comment"> * @code</span>
<a name="l00138"></a>00138 <span class="comment"> * [-][HH:]MM:SS[.m...]</span>
<a name="l00139"></a>00139 <span class="comment"> * [-]S+[.m...]</span>
<a name="l00140"></a>00140 <span class="comment"> * @endcode</span>
<a name="l00141"></a>00141 <span class="comment"> * @param duration flag which tells how to interpret timestr, if not</span>
<a name="l00142"></a>00142 <span class="comment"> * zero timestr is interpreted as a duration, otherwise as a date</span>
<a name="l00143"></a>00143 <span class="comment"> * @return >= 0 in case of success, a negative value corresponding to an</span>
<a name="l00144"></a>00144 <span class="comment"> * AVERROR code otherwise</span>
<a name="l00145"></a>00145 <span class="comment"> */</span>
<a name="l00146"></a>00146 <span class="keywordtype">int</span> <a class="code" href="parseutils_8h.html#a98590feafe82e074f61f38c8faaa4cef" title="Parse timestr and return in *time a corresponding number of microseconds.">av_parse_time</a>(int64_t *timeval, <span class="keyword">const</span> <span class="keywordtype">char</span> *timestr, <span class="keywordtype">int</span> duration);
<a name="l00147"></a>00147 <span class="comment"></span>
<a name="l00148"></a>00148 <span class="comment">/**</span>
<a name="l00149"></a>00149 <span class="comment"> * Attempt to find a specific tag in a URL.</span>
<a name="l00150"></a>00150 <span class="comment"> *</span>
<a name="l00151"></a>00151 <span class="comment"> * syntax: '?tag1=val1&tag2=val2...'. Little URL decoding is done.</span>
<a name="l00152"></a>00152 <span class="comment"> * Return 1 if found.</span>
<a name="l00153"></a>00153 <span class="comment"> */</span>
<a name="l00154"></a>00154 <span class="keywordtype">int</span> <a class="code" href="parseutils_8h.html#ad97f06e907c14c253c2bf3e775f51ccb" title="Attempt to find a specific tag in a URL.">av_find_info_tag</a>(<span class="keywordtype">char</span> *arg, <span class="keywordtype">int</span> arg_size, <span class="keyword">const</span> <span class="keywordtype">char</span> *tag1, <span class="keyword">const</span> <span class="keywordtype">char</span> *info);
<a name="l00155"></a>00155 <span class="comment"></span>
<a name="l00156"></a>00156 <span class="comment">/**</span>
<a name="l00157"></a>00157 <span class="comment"> * Simplified version of strptime</span>
<a name="l00158"></a>00158 <span class="comment"> *</span>
<a name="l00159"></a>00159 <span class="comment"> * Parse the input string p according to the format string fmt and</span>
<a name="l00160"></a>00160 <span class="comment"> * store its results in the structure dt.</span>
<a name="l00161"></a>00161 <span class="comment"> * This implementation supports only a subset of the formats supported</span>
<a name="l00162"></a>00162 <span class="comment"> * by the standard strptime().</span>
<a name="l00163"></a>00163 <span class="comment"> *</span>
<a name="l00164"></a>00164 <span class="comment"> * The supported input field descriptors are listed below.</span>
<a name="l00165"></a>00165 <span class="comment"> * - %H: the hour as a decimal number, using a 24-hour clock, in the</span>
<a name="l00166"></a>00166 <span class="comment"> * range '00' through '23'</span>
<a name="l00167"></a>00167 <span class="comment"> * - %J: hours as a decimal number, in the range '0' through INT_MAX</span>
<a name="l00168"></a>00168 <span class="comment"> * - %M: the minute as a decimal number, using a 24-hour clock, in the</span>
<a name="l00169"></a>00169 <span class="comment"> * range '00' through '59'</span>
<a name="l00170"></a>00170 <span class="comment"> * - %S: the second as a decimal number, using a 24-hour clock, in the</span>
<a name="l00171"></a>00171 <span class="comment"> * range '00' through '59'</span>
<a name="l00172"></a>00172 <span class="comment"> * - %Y: the year as a decimal number, using the Gregorian calendar</span>
<a name="l00173"></a>00173 <span class="comment"> * - %m: the month as a decimal number, in the range '1' through '12'</span>
<a name="l00174"></a>00174 <span class="comment"> * - %d: the day of the month as a decimal number, in the range '1'</span>
<a name="l00175"></a>00175 <span class="comment"> * through '31'</span>
<a name="l00176"></a>00176 <span class="comment"> * - %T: alias for '%H:%M:%S'</span>
<a name="l00177"></a>00177 <span class="comment"> * - %%: a literal '%'</span>
<a name="l00178"></a>00178 <span class="comment"> *</span>
<a name="l00179"></a>00179 <span class="comment"> * @return a pointer to the first character not processed in this function</span>
<a name="l00180"></a>00180 <span class="comment"> * call. In case the input string contains more characters than</span>
<a name="l00181"></a>00181 <span class="comment"> * required by the format string the return value points right after</span>
<a name="l00182"></a>00182 <span class="comment"> * the last consumed input character. In case the whole input string</span>
<a name="l00183"></a>00183 <span class="comment"> * is consumed the return value points to the null byte at the end of</span>
<a name="l00184"></a>00184 <span class="comment"> * the string. On failure NULL is returned.</span>
<a name="l00185"></a>00185 <span class="comment"> */</span>
<a name="l00186"></a>00186 <span class="keywordtype">char</span> *<a class="code" href="parseutils_8h.html#acd5cd7c7ffea52ca3697864253384ffe" title="Simplified version of strptime.">av_small_strptime</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *p, <span class="keyword">const</span> <span class="keywordtype">char</span> *fmt, <span class="keyword">struct</span> tm *dt);
<a name="l00187"></a>00187 <span class="comment"></span>
<a name="l00188"></a>00188 <span class="comment">/**</span>
<a name="l00189"></a>00189 <span class="comment"> * Convert the decomposed UTC time in tm to a time_t value.</span>
<a name="l00190"></a>00190 <span class="comment"> */</span>
<a name="l00191"></a>00191 time_t <a class="code" href="parseutils_8h.html#ae9bf34b50b9762f3c733721d5210b52d" title="Convert the decomposed UTC time in tm to a time_t value.">av_timegm</a>(<span class="keyword">struct</span> tm *tm);
<a name="l00192"></a>00192
<a name="l00193"></a>00193 <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_PARSEUTILS_H */</span>
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