1 <html> 2 3 <head> 4 <title>Vorbisfile - function - ov_time_seek_lap</title> 5 <link rel=stylesheet href="style.css" type="text/css"> 6 </head> 7 8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff"> 9 <table border=0 width=100%> 10 <tr> 11 <td><p class=tiny>Vorbisfile documentation</p></td> 12 <td align=right><p class=tiny>vorbisfile version 1.2.0 - 20070723</p></td> 13 </tr> 14 </table> 15 16 <h1>ov_time_seek_lap</h1> 17 18 <p><i>declared in "vorbis/vorbisfile.h";</i></p> 19 20 <p>For seekable 21 streams, ov_time_seek_lap seeks to the given time. This variant of <a 22 href="ov_time_seek.html">ov_time_seek</a> also automatically 23 crosslaps the transition from the previous playback position into the 24 new playback position in order to eliminate clicking and boundary 25 discontinuities. Otherwise, usage and behavior is identical to <a 26 href="ov_time_seek.html">ov_time_seek</a>. 27 28 <p>ov_time_seek_lap also updates everything needed within the decoder, 29 so you can immediately call <a href="ov_read.html">ov_read()</a> and 30 get data from the newly seeked to position. 31 32 <p>ov_time_seek_lap will lap between logical stream links of differing 33 numbers of channels. Any extra channels from the origin of the seek 34 are ignored; playback of these channels simply ends. Extra channels at 35 the destination are lapped from silence. ov_time_seek_lap will also 36 lap between logical stream links of differing sample rates. In this 37 case, the sample rates are ignored (no implicit resampling is done to 38 match playback). It is up to the application developer to decide if 39 this behavior makes any sense in a given context; in practical use, 40 these default behaviors perform sensibly. 41 42 <p> This function does not work for unseekable streams. 43 44 45 <br><br> 46 <table border=0 color=black cellspacing=0 cellpadding=7> 47 <tr bgcolor=#cccccc> 48 <td> 49 <pre><b> 50 int ov_time_seek_lap(<a href="OggVorbis_File.html">OggVorbis_File</a> *vf, double s); 51 </b></pre> 52 </td> 53 </tr> 54 </table> 55 56 <h3>Parameters</h3> 57 <dl> 58 <dt><i>vf</i></dt> 59 <dd>Pointer to our already opened and initialized OggVorbis_File structure.</dd> 60 <dt><i>ms</i></dt> 61 <dd>Location to seek to within the file, specified in seconds.</dd> 62 </dl> 63 64 65 <h3>Return Values</h3> 66 <blockquote> 67 <ul> 68 <li>0 for success</li> 69 70 <li> 71 nonzero indicates failure, described by several error codes: 72 <ul> 73 <li>OV_ENOSEEK - Bitstream is not seekable. 74 </li> 75 <li>OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open. 76 </li> 77 <li>OV_EREAD - A read from media returned an error. 78 </li> 79 <li>OV_EFAULT - Internal logic fault; indicates a bug or heap/stack 80 corruption. 81 </li> 82 <li>OV_EOF - Indicates stream is at end of file immediately after a seek 83 (making crosslap impossible as there's no preceeding decode state to crosslap). 84 </li> 85 <li>OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt. 86 </li> 87 </ul></li> 88 </ul></blockquote> 89 90 91 <br><br> 92 <hr noshade> 93 <table border=0 width=100%> 94 <tr valign=top> 95 <td><p class=tiny>copyright © 2007 Xiph.org</p></td> 96 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a></p></td> 97 </tr><tr> 98 <td><p class=tiny>Vorbisfile documentation</p></td> 99 <td align=right><p class=tiny>vorbisfile version 1.2.0 - 20070723</p></td> 100 </tr> 101 </table> 102 103 </body> 104 105 </html> 106
