101 lines
3.3 KiB
HTML
101 lines
3.3 KiB
HTML
<html>
|
|
|
|
<head>
|
|
<title>Vorbisfile - function - ov_crosslap</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_crosslap()</h1>
|
|
|
|
<p><i>declared in "vorbis/vorbisfile.h";</i></p>
|
|
|
|
<p>ov_crosslap overlaps and blends the boundary at a transition
|
|
between two separate streams represented by separate <a
|
|
href="OggVorbis_File.html">OggVorbis_File</a> structures. For lapping
|
|
transitions due to seeking within a single stream represented by a
|
|
single <a href="OggVorbis_File.html">OggVorbis_File</a> structure,
|
|
consider using the lapping versions of the <a
|
|
href="seeking.html">vorbisfile seeking functions</a> instead.
|
|
|
|
<p>ov_crosslap is used between the last (usually ov_read) call on
|
|
the old stream and the first ov_read from the new stream. Any
|
|
desired positioning of the new stream must occur before the call to
|
|
ov_crosslap() as a seek dumps all prior lapping information from a
|
|
stream's decode state. Crosslapping does not introduce or remove any
|
|
extraneous samples; positioning works exactly as if ov_crosslap was not
|
|
called.
|
|
|
|
<p>ov_crosslap will lap between streams of differing numbers of
|
|
channels. Any extra channels from the old stream are ignored; playback
|
|
of these channels simply ends. Extra channels in the new stream are
|
|
lapped from silence. ov_crosslap will also lap between streams links
|
|
of differing sample rates. In this case, the sample rates are ignored
|
|
(no implicit resampling is done to match playback). It is up to the
|
|
application developer to decide if this behavior makes any sense in a
|
|
given context; in practical use, these default behaviors perform
|
|
sensibly.
|
|
|
|
<br><br>
|
|
<table border=0 color=black cellspacing=0 cellpadding=7>
|
|
<tr bgcolor=#cccccc>
|
|
<td>
|
|
<pre><b>
|
|
long ov_crosslap(<a href="OggVorbis_File.html">OggVorbis_File</a> *old, <a href="OggVorbis_File.html">OggVorbis_File</a> *new);
|
|
|
|
</b></pre>
|
|
</td>
|
|
</tr>
|
|
</table>
|
|
|
|
<h3>Parameters</h3>
|
|
<dl>
|
|
<dt><i>old</i></dt>
|
|
<dd>A pointer to the OggVorbis_File structure representing the origin stream from which to transition playback.</dd>
|
|
|
|
<dt><i>new</i></dt>
|
|
<dd>A pointer to the OggVorbis_File structure representing the stream with which playback continues.</dd>
|
|
</dl>
|
|
|
|
|
|
<h3>Return Values</h3>
|
|
<blockquote>
|
|
<dl>
|
|
<dt>OV_EINVAL</dt>
|
|
<dd>crosslap called with an OggVorbis_File structure that isn't open.</dd>
|
|
<dt>OV_EFAULT</dt>
|
|
<dd>internal error; implies a library bug or external heap corruption.</dd>
|
|
<dt>OV_EREAD</dt>
|
|
<dd> A read from media returned an error.</dd>
|
|
<dt>OV_EOF</dt>
|
|
<dd>indicates stream <tt>vf2</tt> is at end of file, or that <tt>vf1</tt> is at end of file immediately after a seek (making crosslap impossible as there's no preceding decode state to crosslap).</dd>
|
|
<dt><i>0</i></dt>
|
|
<dd>success.</dd>
|
|
</dl>
|
|
</blockquote>
|
|
|
|
|
|
|
|
<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>
|