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| author | Aki <please@ignore.pl> | 2021-09-29 22:52:49 +0200 |
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| committer | Aki <please@ignore.pl> | 2021-09-29 22:52:49 +0200 |
| commit | 74f4b1bc3b627ba4c7e03498234d88cacdfbe97b (patch) | |
| tree | 197b5978d6e38f44069ea92583098a1da04aa635 /doc/vorbisfile/ov_test.html | |
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diff --git a/doc/vorbisfile/ov_test.html b/doc/vorbisfile/ov_test.html new file mode 100644 index 0000000..cb11d01 --- /dev/null +++ b/doc/vorbisfile/ov_test.html @@ -0,0 +1,104 @@ +<html> + +<head> +<title>Vorbisfile - function - ov_test</title> +<link rel=stylesheet href="style.css" type="text/css"> +</head> + +<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff"> +<table border=0 width=100%> +<tr> +<td><p class=tiny>Vorbisfile documentation</p></td> +<td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td> +</tr> +</table> + +<h1>ov_test</h1> + +<p><i>declared in "vorbis/vorbisfile.h";</i></p> + +<p> +This partially opens a vorbis file to test for Vorbis-ness. It loads +the headers for the first chain and tests for seekability (but does +not seek). Use <a href="ov_test_open.html">ov_test_open()</a> to +finish opening the file or <a href="ov_clear.html">ov_clear</a> to +close/free it. Note that vorbisfile does <b>not</b> take ownership of +the file if the call fails; the calling applicaiton is responsible for +closing the file if this call returns an error. +<p> + +<p><em><b> WARNING for Windows developers: </b> Do not use ov_test() +in Windows applications; Windows linking places restrictions on +passing <tt>FILE *</tt> handles successfully, and ov_test() runs afoul +of these restrictions <a href="#winfoot">[a]</a> in exactly the same +way as <a href="ov_open.html">ov_open()</a>. See the <a +href="ov_test_callbacks.html">ov_test_callbacks() page </a> for +details on using <a +href="ov_test_callbacks.html">ov_test_callbacks()</a> instead. </em> +<p> + +<table border=0 color=black cellspacing=0 cellpadding=7> +<tr bgcolor=#cccccc> + <td> +<pre><b> +int ov_test(FILE *f,<a href="OggVorbis_File.html">OggVorbis_File</a> *vf,char *initial,long ibytes); +</b></pre> + </td> +</tr> +</table> + +<h3>Parameters</h3> +<dl> +<dt><i>f</i></dt> +<dd>File pointer to an already opened file +or pipe (it need not be seekable--though this obviously restricts what +can be done with the bitstream).</dd> +<dt><i>vf</i></dt> +<dd>A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile +functions. Once this has been called, the same <tt>OggVorbis_File</tt> +struct should be passed to all the libvorbisfile functions.</dd> +<dt><i>initial</i></dt> +<dd>Typically set to NULL. This parameter is useful if some data has already been +read from the file and the stream is not seekable. It is used in conjunction with <tt>ibytes</tt>. In this case, <tt>initial</tt> +should be a pointer to a buffer containing the data read.</dd> +<dt><i>ibytes</i></dt> +<dd>Typically set to 0. This parameter is useful if some data has already been +read from the file and the stream is not seekable. In this case, <tt>ibytes</tt> +should contain the length (in bytes) of the buffer. Used together with <tt>initial</tt></dd> +</dl> + + +<h3>Return Values</h3> +<blockquote> +<li>0 for success</li> + +<li>less than zero for failure:</li> +<ul> +<li>OV_EREAD - A read from media returned an error.</li> +<li>OV_ENOTVORBIS - Bitstream contains no Vorbis data.</li> +<li>OV_EVERSION - Vorbis version mismatch.</li> +<li>OV_EBADHEADER - Invalid Vorbis bitstream header.</li> +<li>OV_EFAULT - Internal logic fault; indicates a bug or heap/stack corruption.</li> +</ul> +</blockquote> +<p> + +<h3>Notes</h3> + +All the <a href="ov_open.html#notes">notes from ov_open()</a> apply to ov_test(). + +<br><br> +<hr noshade> +<table border=0 width=100%> +<tr valign=top> +<td><p class=tiny>copyright © 2000-2010 Xiph.Org</p></td> +<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a></p></td> +</tr><tr> +<td><p class=tiny>Vorbisfile documentation</p></td> +<td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td> +</tr> +</table> + +</body> + +</html> |