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<a href="#nested-classes">Data Structures</a> |
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<div class="title">libavutil/timecode.h File Reference</div> </div>
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<p>Timecode helpers header.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include <stdint.h></code><br/>
<code>#include "<a class="el" href="rational_8h_source.html">rational.h</a>"</code><br/>
</div>
<p><a href="timecode_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVTimecode.html">AVTimecode</a></td></tr>
<tr><td colspan="2"><h2><a name="define-members"></a>
Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#a60186b13997e64a4aca71ff641634f9d">AV_TIMECODE_STR_SIZE</a>   16</td></tr>
<tr><td colspan="2"><h2><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#ad0e6464512b7849a2d14593708079219">AVTimecodeFlag</a> { <a class="el" href="timecode_8h.html#ad0e6464512b7849a2d14593708079219a4cacf5e87e2f19987c5e931be20a5c33">AV_TIMECODE_FLAG_DROPFRAME</a> = 1<<0,
<a class="el" href="timecode_8h.html#ad0e6464512b7849a2d14593708079219abf78793ae8e9e28a4f85bb1a76992f1b">AV_TIMECODE_FLAG_24HOURSMAX</a> = 1<<1,
<a class="el" href="timecode_8h.html#ad0e6464512b7849a2d14593708079219a373f53f5f7544e479b6c6b36b254fc8d">AV_TIMECODE_FLAG_ALLOWNEGATIVE</a> = 1<<2
}</td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#aef6b950d708ea805b970c16e71a97869">av_timecode_adjust_ntsc_framenum2</a> (int framenum, int fps)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Adjust frame number for NTSC drop frame time code. <a href="#aef6b950d708ea805b970c16e71a97869"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#ae3045b65cc54f72e9d53d3c97a5f4da5">av_timecode_get_smpte_from_framenum</a> (const <a class="el" href="structAVTimecode.html">AVTimecode</a> *tc, int framenum)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Convert frame number to SMPTE 12M binary representation. <a href="#ae3045b65cc54f72e9d53d3c97a5f4da5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#a8cadcdf7e38091651068f70adb94f867">av_timecode_make_string</a> (const <a class="el" href="structAVTimecode.html">AVTimecode</a> *tc, char *buf, int framenum)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Load timecode string in buf. <a href="#a8cadcdf7e38091651068f70adb94f867"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#a24963ec8df5712caa8c30b046804d866">av_timecode_make_smpte_tc_string</a> (char *buf, uint32_t tcsmpte, int prevent_df)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the timecode string from the SMPTE timecode format. <a href="#a24963ec8df5712caa8c30b046804d866"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#a671b3f88e40043bb521550f911cd6b16">av_timecode_make_mpeg_tc_string</a> (char *buf, uint32_t tc25bit)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the timecode string from the 25-bit timecode format (MPEG GOP format). <a href="#a671b3f88e40043bb521550f911cd6b16"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#ad279cd982964a2f8cc7adfa01533b412">av_timecode_init</a> (<a class="el" href="structAVTimecode.html">AVTimecode</a> *tc, <a class="el" href="structAVRational.html">AVRational</a> rate, int flags, int frame_start, void *log_ctx)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Init a timecode struct with the passed parameters. <a href="#ad279cd982964a2f8cc7adfa01533b412"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#a02596c9d431329a3acc646c943b1c800">av_timecode_init_from_string</a> (<a class="el" href="structAVTimecode.html">AVTimecode</a> *tc, <a class="el" href="structAVRational.html">AVRational</a> rate, const char *str, void *log_ctx)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Parse timecode representation (hh:mm:ss[:;. <a href="#a02596c9d431329a3acc646c943b1c800"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="timecode_8h.html#ae181c7f842ad64c2e75c320e46f4edfc">av_timecode_check_frame_rate</a> (<a class="el" href="structAVRational.html">AVRational</a> rate)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check if the timecode feature is available for the given frame rate. <a href="#ae181c7f842ad64c2e75c320e46f4edfc"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Timecode helpers header. </p>
<p>Definition in file <a class="el" href="timecode_8h_source.html">timecode.h</a>.</p>
</div><hr/><h2>Define Documentation</h2>
<a class="anchor" id="a60186b13997e64a4aca71ff641634f9d"></a><!-- doxytag: member="timecode.h::AV_TIMECODE_STR_SIZE" ref="a60186b13997e64a4aca71ff641634f9d" args="" -->
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<td class="memname">#define <a class="el" href="timecode_8h.html#a60186b13997e64a4aca71ff641634f9d">AV_TIMECODE_STR_SIZE</a>   16</td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Definition at line <a class="el" href="timecode_8h_source.html#l00033">33</a> of file <a class="el" href="timecode_8h_source.html">timecode.h</a>.</p>
</div>
</div>
<hr/><h2>Enumeration Type Documentation</h2>
<a class="anchor" id="ad0e6464512b7849a2d14593708079219"></a><!-- doxytag: member="timecode.h::AVTimecodeFlag" ref="ad0e6464512b7849a2d14593708079219" args="" -->
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<td class="memname">enum <a class="el" href="timecode_8h.html#ad0e6464512b7849a2d14593708079219">AVTimecodeFlag</a></td>
</tr>
</table>
</div>
<div class="memdoc">
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="ad0e6464512b7849a2d14593708079219a4cacf5e87e2f19987c5e931be20a5c33"></a><!-- doxytag: member="AV_TIMECODE_FLAG_DROPFRAME" ref="ad0e6464512b7849a2d14593708079219a4cacf5e87e2f19987c5e931be20a5c33" args="" -->AV_TIMECODE_FLAG_DROPFRAME</em> </td><td>
<p>timecode is drop frame </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ad0e6464512b7849a2d14593708079219abf78793ae8e9e28a4f85bb1a76992f1b"></a><!-- doxytag: member="AV_TIMECODE_FLAG_24HOURSMAX" ref="ad0e6464512b7849a2d14593708079219abf78793ae8e9e28a4f85bb1a76992f1b" args="" -->AV_TIMECODE_FLAG_24HOURSMAX</em> </td><td>
<p>timecode wraps after 24 hours </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="ad0e6464512b7849a2d14593708079219a373f53f5f7544e479b6c6b36b254fc8d"></a><!-- doxytag: member="AV_TIMECODE_FLAG_ALLOWNEGATIVE" ref="ad0e6464512b7849a2d14593708079219a373f53f5f7544e479b6c6b36b254fc8d" args="" -->AV_TIMECODE_FLAG_ALLOWNEGATIVE</em> </td><td>
<p>negative time values are allowed </p>
</td></tr>
</table>
</dd>
</dl>
<p>Definition at line <a class="el" href="timecode_8h_source.html#l00035">35</a> of file <a class="el" href="timecode_8h_source.html">timecode.h</a>.</p>
</div>
</div>
<hr/><h2>Function Documentation</h2>
<a class="anchor" id="aef6b950d708ea805b970c16e71a97869"></a><!-- doxytag: member="timecode.h::av_timecode_adjust_ntsc_framenum2" ref="aef6b950d708ea805b970c16e71a97869" args="(int framenum, int fps)" -->
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<td class="memname">int <a class="el" href="timecode_8h.html#aef6b950d708ea805b970c16e71a97869">av_timecode_adjust_ntsc_framenum2</a> </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>framenum</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>fps</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Adjust frame number for NTSC drop frame time code. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">framenum</td><td>frame number to adjust </td></tr>
<tr><td class="paramname">fps</td><td>frame per second, 30 or 60 </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>adjusted frame number </dd></dl>
<dl class="warning"><dt><b>Warning:</b></dt><dd>adjustment is only valid in NTSC 29.97 and 59.94 </dd></dl>
</div>
</div>
<a class="anchor" id="ae3045b65cc54f72e9d53d3c97a5f4da5"></a><!-- doxytag: member="timecode.h::av_timecode_get_smpte_from_framenum" ref="ae3045b65cc54f72e9d53d3c97a5f4da5" args="(const AVTimecode *tc, int framenum)" -->
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<td class="memname">uint32_t <a class="el" href="timecode_8h.html#ae3045b65cc54f72e9d53d3c97a5f4da5">av_timecode_get_smpte_from_framenum</a> </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="structAVTimecode.html">AVTimecode</a> * </td>
<td class="paramname"><em>tc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>framenum</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Convert frame number to SMPTE 12M binary representation. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">tc</td><td>timecode data correctly initialized </td></tr>
<tr><td class="paramname">framenum</td><td>frame number </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>the SMPTE binary representation</dd></dl>
<dl class="note"><dt><b>Note:</b></dt><dd>Frame number adjustment is automatically done in case of drop timecode, you do NOT have to call <a class="el" href="timecode_8h.html#aef6b950d708ea805b970c16e71a97869" title="Adjust frame number for NTSC drop frame time code.">av_timecode_adjust_ntsc_framenum2()</a>. </dd>
<dd>
The frame number is relative to tc->start. </dd>
<dd>
Color frame (CF), binary group flags (BGF) and biphase mark polarity correction (PC) bits are set to zero. </dd></dl>
</div>
</div>
<a class="anchor" id="a8cadcdf7e38091651068f70adb94f867"></a><!-- doxytag: member="timecode.h::av_timecode_make_string" ref="a8cadcdf7e38091651068f70adb94f867" args="(const AVTimecode *tc, char *buf, int framenum)" -->
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<td class="memname">char* <a class="el" href="timecode_8h.html#a8cadcdf7e38091651068f70adb94f867">av_timecode_make_string</a> </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="structAVTimecode.html">AVTimecode</a> * </td>
<td class="paramname"><em>tc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">char * </td>
<td class="paramname"><em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>framenum</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Load timecode string in buf. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">buf</td><td>destination buffer, must be at least AV_TIMECODE_STR_SIZE long </td></tr>
<tr><td class="paramname">tc</td><td>timecode data correctly initialized </td></tr>
<tr><td class="paramname">framenum</td><td>frame number </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>the buf parameter</dd></dl>
<dl class="note"><dt><b>Note:</b></dt><dd>Timecode representation can be a negative timecode and have more than 24 hours, but will only be honored if the flags are correctly set. </dd>
<dd>
The frame number is relative to tc->start. </dd></dl>
</div>
</div>
<a class="anchor" id="a24963ec8df5712caa8c30b046804d866"></a><!-- doxytag: member="timecode.h::av_timecode_make_smpte_tc_string" ref="a24963ec8df5712caa8c30b046804d866" args="(char *buf, uint32_t tcsmpte, int prevent_df)" -->
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<td class="memname">char* <a class="el" href="timecode_8h.html#a24963ec8df5712caa8c30b046804d866">av_timecode_make_smpte_tc_string</a> </td>
<td>(</td>
<td class="paramtype">char * </td>
<td class="paramname"><em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t </td>
<td class="paramname"><em>tcsmpte</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>prevent_df</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Get the timecode string from the SMPTE timecode format. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">buf</td><td>destination buffer, must be at least AV_TIMECODE_STR_SIZE long </td></tr>
<tr><td class="paramname">tcsmpte</td><td>the 32-bit SMPTE timecode </td></tr>
<tr><td class="paramname">prevent_df</td><td>prevent the use of a drop flag when it is known the DF bit is arbitrary </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>the buf parameter </dd></dl>
</div>
</div>
<a class="anchor" id="a671b3f88e40043bb521550f911cd6b16"></a><!-- doxytag: member="timecode.h::av_timecode_make_mpeg_tc_string" ref="a671b3f88e40043bb521550f911cd6b16" args="(char *buf, uint32_t tc25bit)" -->
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<td class="memname">char* <a class="el" href="timecode_8h.html#a671b3f88e40043bb521550f911cd6b16">av_timecode_make_mpeg_tc_string</a> </td>
<td>(</td>
<td class="paramtype">char * </td>
<td class="paramname"><em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t </td>
<td class="paramname"><em>tc25bit</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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</div>
<div class="memdoc">
<p>Get the timecode string from the 25-bit timecode format (MPEG GOP format). </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">buf</td><td>destination buffer, must be at least AV_TIMECODE_STR_SIZE long </td></tr>
<tr><td class="paramname">tc25bit</td><td>the 25-bits timecode </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>the buf parameter </dd></dl>
</div>
</div>
<a class="anchor" id="ad279cd982964a2f8cc7adfa01533b412"></a><!-- doxytag: member="timecode.h::av_timecode_init" ref="ad279cd982964a2f8cc7adfa01533b412" args="(AVTimecode *tc, AVRational rate, int flags, int frame_start, void *log_ctx)" -->
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<td>(</td>
<td class="paramtype"><a class="el" href="structAVTimecode.html">AVTimecode</a> * </td>
<td class="paramname"><em>tc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structAVRational.html">AVRational</a> </td>
<td class="paramname"><em>rate</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>flags</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>frame_start</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>log_ctx</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Init a timecode struct with the passed parameters. </p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">log_ctx</td><td>a pointer to an arbitrary struct of which the first field is a pointer to an <a class="el" href="structAVClass.html" title="Describe the class of an AVClass context structure.">AVClass</a> struct (used for av_log) </td></tr>
<tr><td class="paramname">tc</td><td>pointer to an allocated <a class="el" href="structAVTimecode.html">AVTimecode</a> </td></tr>
<tr><td class="paramname">rate</td><td>frame rate in rational form </td></tr>
<tr><td class="paramname">flags</td><td>miscellaneous flags such as drop frame, +24 hours, ... (see AVTimecodeFlag) </td></tr>
<tr><td class="paramname">frame_start</td><td>the first frame number </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success, AVERROR otherwise </dd></dl>
</div>
</div>
<a class="anchor" id="a02596c9d431329a3acc646c943b1c800"></a><!-- doxytag: member="timecode.h::av_timecode_init_from_string" ref="a02596c9d431329a3acc646c943b1c800" args="(AVTimecode *tc, AVRational rate, const char *str, void *log_ctx)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="timecode_8h.html#a02596c9d431329a3acc646c943b1c800">av_timecode_init_from_string</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVTimecode.html">AVTimecode</a> * </td>
<td class="paramname"><em>tc</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="structAVRational.html">AVRational</a> </td>
<td class="paramname"><em>rate</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>str</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">void * </td>
<td class="paramname"><em>log_ctx</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Parse timecode representation (hh:mm:ss[:;. </p>
<p>]ff).</p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
<table class="params">
<tr><td class="paramname">log_ctx</td><td>a pointer to an arbitrary struct of which the first field is a pointer to an <a class="el" href="structAVClass.html" title="Describe the class of an AVClass context structure.">AVClass</a> struct (used for av_log). </td></tr>
<tr><td class="paramname">tc</td><td>pointer to an allocated <a class="el" href="structAVTimecode.html">AVTimecode</a> </td></tr>
<tr><td class="paramname">rate</td><td>frame rate in rational form </td></tr>
<tr><td class="paramname">str</td><td>timecode string which will determine the frame start </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success, AVERROR otherwise </dd></dl>
</div>
</div>
<a class="anchor" id="ae181c7f842ad64c2e75c320e46f4edfc"></a><!-- doxytag: member="timecode.h::av_timecode_check_frame_rate" ref="ae181c7f842ad64c2e75c320e46f4edfc" args="(AVRational rate)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int <a class="el" href="timecode_8h.html#ae181c7f842ad64c2e75c320e46f4edfc">av_timecode_check_frame_rate</a> </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structAVRational.html">AVRational</a> </td>
<td class="paramname"><em>rate</em></td><td>)</td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Check if the timecode feature is available for the given frame rate. </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if supported, <0 otherwise </dd></dl>
</div>
</div>
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