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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/initialization.html | |
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Squashed 'vorbis/' content from commit d22c3ab5f
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git-subtree-split: d22c3ab5f633460abc2532feee60ca0892134cbf
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diff --git a/doc/vorbisfile/initialization.html b/doc/vorbisfile/initialization.html new file mode 100644 index 0000000..da83957 --- /dev/null +++ b/doc/vorbisfile/initialization.html @@ -0,0 +1,118 @@ +<html> + +<head> +<title>Vorbisfile - Setup/Teardown</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>Setup/Teardown</h1> <p>In order to decode audio using +libvorbisfile, a bitstream containing Vorbis audio must be properly +initialized before decoding and cleared when decoding is finished. +The simplest possible case is to use <a +href="ov_fopen.html">ov_fopen()</a> to open the file for access, check +it for Vorbis content, and prepare it for playback. A successful <a +href="../libvorbis/return.html">return code</a> from <a +href="ov_fopen.html">ov_fopen()</a> indicates the file is ready for use. +Once the file is no longer needed, <a +href="ov_clear.html">ov_clear()</a> is used to close the file and +deallocate decoding resources.<p> + +On systems other than Windows<a href="ov_open.html#winfoot">[a]</a>, an +application may also open a file itself using <tt>fopen()</tt>, then pass the +<tt>FILE *</tt> to libvorbisfile using <a +href="ov_open.html">ov_open()</a>. </b>Do not</b> call +<tt>fclose()</tt> on a file handle successfully submitted to <a +href="ov_open.html">ov_open()</a>; libvorbisfile does this in the <a +href="ov_clear.html">ov_clear()</a> call.<p> + +An application that requires more setup flexibility may open a data +stream using <a href="ov_open_callbacks.html">ov_open_callbacks()</a> +to change default libvorbis behavior or specify non-stdio data access +mechanisms.<p> + +<p> +All libvorbisfile initialization and deallocation routines are declared in "vorbis/vorbisfile.h". +<p> + +<table border=1 color=black width=50% cellspacing=0 cellpadding=7> +<tr bgcolor=#cccccc> + <td><b>function</b></td> + <td><b>purpose</b></td> +</tr> +<tr valign=top> + <td><a href="ov_fopen.html">ov_fopen</a></td> + <td>Opens a file and initializes the Ogg Vorbis bitstream with default values. This must be called before other functions in the library may be + used.</td> +</tr> +<tr valign=top> + <td><a href="ov_open.html">ov_open</a></td> + <td>Initializes the Ogg Vorbis bitstream with default values from a passed in file handle. This must be called before other functions in the library may be + used. <a href="#winfoot"><em>Do not use this call under Windows [a];</em></a> Use <a href="ov_fopen.html">ov_fopen()</a> or <a href="ov_open_callbacks.html">ov_open_callbacks()</a> instead.</td> +</tr> +<tr valign=top> + <td><a href="ov_open_callbacks.html">ov_open_callbacks</a></td> + <td>Initializes the Ogg Vorbis bitstream from a file handle and custom file/bitstream manipulation routines. Used instead of <a href="ov_open.html">ov_open()</a> or <a href="ov_fopen.html">ov_fopen()</a> when altering or replacing libvorbis's default stdio I/O behavior, or when a bitstream must be initialized from a <tt>FILE *</tt> under Windows.</td> +</tr> + +<tr valign=top> +<td><a href="ov_test.html">ov_test</a></td> + +<td>Partially opens a file just far enough to determine if the file +is an Ogg Vorbis file or not. A successful return indicates that the +file appears to be an Ogg Vorbis file, but the <a +href="OggVorbis_File.html">OggVorbis_File</a> struct is not yet fully +initialized for actual decoding. After a <a href="../libvorbis/return.html">successful return</a>, the file +may be closed using <a href="ov_clear.html">ov_clear()</a> or fully +opened for decoding using <a +href="ov_test_open.html">ov_test_open()</a>.<p> This call is intended to +be used as a less expensive file open test than a full <a +href="ov_open.html">ov_open()</a>.<p> +Note that libvorbisfile owns the passed in file resource is it returns success; do not <tt>fclose()</tt> files owned by libvorbisfile.</td> + +</tr> +<tr valign=top> +<td><a href="ov_test_callbacks.html">ov_test_callbacks</a></td> +<td>As above but allowing application-define I/O callbacks.<p> +Note that libvorbisfile owns the passed in file resource is it returns success; do not <tt>fclose()</tt> files owned by libvorbisfile.</td> + +</tr> +<tr valign=top> +<td><a href="ov_test_open.html">ov_test_open</a><td> +Finish opening a file after a successful call to <a href="ov_test.html">ov_test()</a> or <a href="ov_test_callbacks.html">ov_test_callbacks()</a>.</td> +</tr> +<tr valign=top> + <td><a href="ov_clear.html">ov_clear</a></td> <td>Closes the + bitstream and cleans up loose ends. Must be called when + finished with the bitstream. After return, the <a + href="OggVorbis_File.html">OggVorbis_File</a> struct is + invalid and may not be used before being initialized again + before begin reinitialized. + +</td> +</tr> +</table> + +<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> |