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119 lines
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<title>libtheora: th_comment Struct Reference</title>
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<h1>th_comment Struct Reference</h1><!-- doxytag: class="th_comment" -->
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<p>The comment information.
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<a href="#_details">More...</a></p>
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<p><code>#include <<a class="el" href="codec_8h_source.html">codec.h</a>></code></p>
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<table border="0" cellpadding="0" cellspacing="0">
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<tr><td colspan="2"><h2>Data Fields</h2></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">char ** </td><td class="memItemRight" valign="bottom"><a class="el" href="structth__comment.html#ad72830e183e707bb0df423eb73b00de4">user_comments</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">The array of comment string vectors. <a href="#ad72830e183e707bb0df423eb73b00de4"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">int * </td><td class="memItemRight" valign="bottom"><a class="el" href="structth__comment.html#a723dc6fdf75757e70e28eea864b10898">comment_lengths</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">An array of the corresponding length of each vector, in bytes. <a href="#a723dc6fdf75757e70e28eea864b10898"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="structth__comment.html#a5990c34932376f070ad0fc314daaeb78">comments</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">The total number of comment strings. <a href="#a5990c34932376f070ad0fc314daaeb78"></a><br/></td></tr>
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<tr><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="structth__comment.html#a93fbe894d23603f56843be15b0cbdba0">vendor</a></td></tr>
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<tr><td class="mdescLeft"> </td><td class="mdescRight">The null-terminated vendor string. <a href="#a93fbe894d23603f56843be15b0cbdba0"></a><br/></td></tr>
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<hr/><a name="_details"></a><h2>Detailed Description</h2>
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<p>The comment information. </p>
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<p>This structure holds the in-stream metadata corresponding to the 'comment' header packet. The comment header is meant to be used much like someone jotting a quick note on the label of a video. It should be a short, to the point text note that can be more than a couple words, but not more than a short paragraph.</p>
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<p>The metadata is stored as a series of (tag, value) pairs, in length-encoded string vectors. The first occurrence of the '=' character delimits the tag and value. A particular tag may occur more than once, and order is significant. The character set encoding for the strings is always UTF-8, but the tag names are limited to ASCII, and treated as case-insensitive. See <a href="http://www.theora.org/doc/Theora.pdf">the Theora specification</a>, Section 6.3.3 for details.</p>
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<p>In filling in this structure, <a class="el" href="group__decfuncs.html#ga006d01d36fbe64768c571e6a12b7fc50" title="Decodes the header packets of a Theora stream.">th_decode_headerin()</a> will null-terminate the user_comment strings for safety. However, the bitstream format itself treats them as 8-bit clean vectors, possibly containing null characters, and so the length array should be treated as their authoritative length. </p>
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<hr/><h2>Field Documentation</h2>
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<a class="anchor" id="a723dc6fdf75757e70e28eea864b10898"></a><!-- doxytag: member="th_comment::comment_lengths" ref="a723dc6fdf75757e70e28eea864b10898" args="" -->
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<td class="memname">int* <a class="el" href="structth__comment.html#a723dc6fdf75757e70e28eea864b10898">th_comment::comment_lengths</a></td>
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<p>An array of the corresponding length of each vector, in bytes. </p>
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<a class="anchor" id="a5990c34932376f070ad0fc314daaeb78"></a><!-- doxytag: member="th_comment::comments" ref="a5990c34932376f070ad0fc314daaeb78" args="" -->
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<td class="memname">int <a class="el" href="structth__comment.html#a5990c34932376f070ad0fc314daaeb78">th_comment::comments</a></td>
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<p>The total number of comment strings. </p>
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<a class="anchor" id="ad72830e183e707bb0df423eb73b00de4"></a><!-- doxytag: member="th_comment::user_comments" ref="ad72830e183e707bb0df423eb73b00de4" args="" -->
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<td class="memname">char** <a class="el" href="structth__comment.html#ad72830e183e707bb0df423eb73b00de4">th_comment::user_comments</a></td>
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<p>The array of comment string vectors. </p>
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<a class="anchor" id="a93fbe894d23603f56843be15b0cbdba0"></a><!-- doxytag: member="th_comment::vendor" ref="a93fbe894d23603f56843be15b0cbdba0" args="" -->
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<td class="memname">char* <a class="el" href="structth__comment.html#a93fbe894d23603f56843be15b0cbdba0">th_comment::vendor</a></td>
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</tr>
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<p>The null-terminated vendor string. </p>
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<p>This identifies the software used to encode the stream. </p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
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<li><a class="el" href="codec_8h_source.html">codec.h</a></li>
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</ul>
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</div>
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<hr size="1"/><address style="text-align: right;"><small>Generated on 28 Sep 2009 for libtheora by
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.1 </small></address>
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