Mercurial > hg > sv-dependency-builds
comparison src/libvorbis-1.3.3/doc/libvorbis/vorbis_comment.html @ 1:05aa0afa9217
Bring in flac, ogg, vorbis
| author | Chris Cannam |
|---|---|
| date | Tue, 19 Mar 2013 17:37:49 +0000 |
| parents | |
| children |
comparison
equal
deleted
inserted
replaced
| 0:c7265573341e | 1:05aa0afa9217 |
|---|---|
| 1 <html> | |
| 2 | |
| 3 <head> | |
| 4 <title>libvorbis - datatype - vorbis_comment</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>libvorbis documentation</p></td> | |
| 12 <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td> | |
| 13 </tr> | |
| 14 </table> | |
| 15 | |
| 16 <h1>vorbis_comment</h1> | |
| 17 | |
| 18 <p><i>declared in "vorbis/codec.h"</i></p> | |
| 19 | |
| 20 <p> | |
| 21 The vorbis_comment structure defines an Ogg Vorbis comment. | |
| 22 <p> | |
| 23 Only the fields the program needs must be defined. If a field isn't | |
| 24 defined by the application, it will either be blank (if it's a string value) | |
| 25 or set to some reasonable default (usually 0). | |
| 26 <p> | |
| 27 <i>Note:</i> When encoding, while it <i>is</i> supported to modify a | |
| 28 vorbis_comment structure directly, be sure to read the notes on the | |
| 29 <a href="vorbis_comment_init.html">vorbis_comment_init</a> and | |
| 30 <a href="vorbis_comment_clear.html">vorbis_comment_clear</a> pages for | |
| 31 considerations on memory allocation and freeing before you do so. Rule of | |
| 32 thumb: call vorbis_comment_init, then <i>either</i> do all allocation, | |
| 33 freeing, and modification yourself and <i>do not</i> call | |
| 34 vorbis_comment_clear, <i>or</i> do all modification using libvorbis | |
| 35 functions and <i>do</i> call vorbis_comment_clear. | |
| 36 <p> | |
| 37 | |
| 38 <table border=0 width=100% color=black cellspacing=0 cellpadding=7> | |
| 39 <tr bgcolor=#cccccc> | |
| 40 <td> | |
| 41 <pre><b>typedef struct vorbis_comment{ | |
| 42 /* unlimited user comment fields. */ | |
| 43 char **user_comments; | |
| 44 int *comment_lengths; | |
| 45 int comments; | |
| 46 char *vendor; | |
| 47 | |
| 48 } vorbis_comment;</b></pre> | |
| 49 </td> | |
| 50 </tr> | |
| 51 </table> | |
| 52 | |
| 53 <h3>Parameters</h3> | |
| 54 <dl> | |
| 55 <dt><i>user_comments</i></dt> | |
| 56 <dd>Unlimited user comment array. The individual strings in the array are 8 bit clean, by the Vorbis specification, and as such the <tt>comment_lengths</tt> array should be consulted to determine string length. For convenience, each string is also NULL-terminated by the decode library (although Vorbis comments are not NULL terminated within the bitstream itself).</dd> | |
| 57 <dt><i>comment_lengths</i></dt> | |
| 58 <dd>An int array that stores the length of each comment string</dd> | |
| 59 <dt><i>comments</i></dt> | |
| 60 <dd>Int signifying number of user comments in user_comments field.</dd> | |
| 61 <dt><i>vendor</i></dt> | |
| 62 <dd>Information about the Vorbis implementation that encoded the file. Stored in a standard C 0-terminated string. Libvorbis will fill this in itself when encoding a comment packet from this structure; when decoding, this contains the vendor string that was in the comment packet.</dd> | |
| 63 </dl> | |
| 64 | |
| 65 | |
| 66 <br><br> | |
| 67 <hr noshade> | |
| 68 <table border=0 width=100%> | |
| 69 <tr valign=top> | |
| 70 <td><p class=tiny>copyright © 2000-2010 Xiph.Org</p></td> | |
| 71 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a></p></td> | |
| 72 </tr><tr> | |
| 73 <td><p class=tiny>libvorbis documentation</p></td> | |
| 74 <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td> | |
| 75 </tr> | |
| 76 </table> | |
| 77 | |
| 78 </body> | |
| 79 | |
| 80 </html> |