|
Chris@1
|
1 <html>
|
|
Chris@1
|
2
|
|
Chris@1
|
3 <head>
|
|
Chris@1
|
4 <title>Vorbisfile - function - ov_crosslap</title>
|
|
Chris@1
|
5 <link rel=stylesheet href="style.css" type="text/css">
|
|
Chris@1
|
6 </head>
|
|
Chris@1
|
7
|
|
Chris@1
|
8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
|
|
Chris@1
|
9 <table border=0 width=100%>
|
|
Chris@1
|
10 <tr>
|
|
Chris@1
|
11 <td><p class=tiny>Vorbisfile documentation</p></td>
|
|
Chris@1
|
12 <td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
|
|
Chris@1
|
13 </tr>
|
|
Chris@1
|
14 </table>
|
|
Chris@1
|
15
|
|
Chris@1
|
16 <h1>ov_crosslap()</h1>
|
|
Chris@1
|
17
|
|
Chris@1
|
18 <p><i>declared in "vorbis/vorbisfile.h";</i></p>
|
|
Chris@1
|
19
|
|
Chris@1
|
20 <p>ov_crosslap overlaps and blends the boundary at a transition
|
|
Chris@1
|
21 between two separate streams represented by separate <a
|
|
Chris@1
|
22 href="OggVorbis_File.html">OggVorbis_File</a> structures. For lapping
|
|
Chris@1
|
23 transitions due to seeking within a single stream represented by a
|
|
Chris@1
|
24 single <a href="OggVorbis_File.html">OggVorbis_File</a> structure,
|
|
Chris@1
|
25 consider using the lapping versions of the <a
|
|
Chris@1
|
26 href="seeking.html">vorbisfile seeking functions</a> instead.
|
|
Chris@1
|
27
|
|
Chris@1
|
28 <p>ov_crosslap is used between the last (usually ov_read) call on
|
|
Chris@1
|
29 the old stream and the first ov_read from the new stream. Any
|
|
Chris@1
|
30 desired positioning of the new stream must occur before the call to
|
|
Chris@1
|
31 ov_crosslap() as a seek dumps all prior lapping information from a
|
|
Chris@1
|
32 stream's decode state. Crosslapping does not introduce or remove any
|
|
Chris@1
|
33 extraneous samples; positioning works exactly as if ov_crosslap was not
|
|
Chris@1
|
34 called.
|
|
Chris@1
|
35
|
|
Chris@1
|
36 <p>ov_crosslap will lap between streams of differing numbers of
|
|
Chris@1
|
37 channels. Any extra channels from the old stream are ignored; playback
|
|
Chris@1
|
38 of these channels simply ends. Extra channels in the new stream are
|
|
Chris@1
|
39 lapped from silence. ov_crosslap will also lap between streams links
|
|
Chris@1
|
40 of differing sample rates. In this case, the sample rates are ignored
|
|
Chris@1
|
41 (no implicit resampling is done to match playback). It is up to the
|
|
Chris@1
|
42 application developer to decide if this behavior makes any sense in a
|
|
Chris@1
|
43 given context; in practical use, these default behaviors perform
|
|
Chris@1
|
44 sensibly.
|
|
Chris@1
|
45
|
|
Chris@1
|
46 <br><br>
|
|
Chris@1
|
47 <table border=0 color=black cellspacing=0 cellpadding=7>
|
|
Chris@1
|
48 <tr bgcolor=#cccccc>
|
|
Chris@1
|
49 <td>
|
|
Chris@1
|
50 <pre><b>
|
|
Chris@1
|
51 long ov_crosslap(<a href="OggVorbis_File.html">OggVorbis_File</a> *old, <a href="OggVorbis_File.html">OggVorbis_File</a> *new);
|
|
Chris@1
|
52
|
|
Chris@1
|
53 </b></pre>
|
|
Chris@1
|
54 </td>
|
|
Chris@1
|
55 </tr>
|
|
Chris@1
|
56 </table>
|
|
Chris@1
|
57
|
|
Chris@1
|
58 <h3>Parameters</h3>
|
|
Chris@1
|
59 <dl>
|
|
Chris@1
|
60 <dt><i>old</i></dt>
|
|
Chris@1
|
61 <dd>A pointer to the OggVorbis_File structure representing the origin stream from which to transition playback.</dd>
|
|
Chris@1
|
62
|
|
Chris@1
|
63 <dt><i>new</i></dt>
|
|
Chris@1
|
64 <dd>A pointer to the OggVorbis_File structure representing the stream with which playback continues.</dd>
|
|
Chris@1
|
65 </dl>
|
|
Chris@1
|
66
|
|
Chris@1
|
67
|
|
Chris@1
|
68 <h3>Return Values</h3>
|
|
Chris@1
|
69 <blockquote>
|
|
Chris@1
|
70 <dl>
|
|
Chris@1
|
71 <dt>OV_EINVAL</dt>
|
|
Chris@1
|
72 <dd>crosslap called with an OggVorbis_File structure that isn't open.</dd>
|
|
Chris@1
|
73 <dt>OV_EFAULT</dt>
|
|
Chris@1
|
74 <dd>internal error; implies a library bug or external heap corruption.</dd>
|
|
Chris@1
|
75 <dt>OV_EREAD</dt>
|
|
Chris@1
|
76 <dd> A read from media returned an error.</dd>
|
|
Chris@1
|
77 <dt>OV_EOF</dt>
|
|
Chris@1
|
78 <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>
|
|
Chris@1
|
79 <dt><i>0</i></dt>
|
|
Chris@1
|
80 <dd>success.</dd>
|
|
Chris@1
|
81 </dl>
|
|
Chris@1
|
82 </blockquote>
|
|
Chris@1
|
83
|
|
Chris@1
|
84
|
|
Chris@1
|
85
|
|
Chris@1
|
86 <br><br>
|
|
Chris@1
|
87 <hr noshade>
|
|
Chris@1
|
88 <table border=0 width=100%>
|
|
Chris@1
|
89 <tr valign=top>
|
|
Chris@1
|
90 <td><p class=tiny>copyright © 2000-2010 Xiph.Org</p></td>
|
|
Chris@1
|
91 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a></p></td>
|
|
Chris@1
|
92 </tr><tr>
|
|
Chris@1
|
93 <td><p class=tiny>Vorbisfile documentation</p></td>
|
|
Chris@1
|
94 <td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
|
|
Chris@1
|
95 </tr>
|
|
Chris@1
|
96 </table>
|
|
Chris@1
|
97
|
|
Chris@1
|
98 </body>
|
|
Chris@1
|
99
|
|
Chris@1
|
100 </html>
|
