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Built SDL2_image and _mixer static

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Alan Youngblood
2022-09-30 15:49:16 -04:00
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<title>Vorbisfile - function - ov_crosslap</title>
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<td><p class=tiny>Vorbisfile documentation</p></td>
<td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
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<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.
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<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>
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<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 &copy; 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>