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<title>ZVBI Library: Extended Data Service (XDS) demultiplexer</title>
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<h1>Extended Data Service (XDS) demultiplexer<br>
<small>
[<a class="el" href="group__LowDec.html">Low Level Decoding</a>]</small>
</h1>Separating XDS data from a Closed Caption stream (EIA 608).
<a href="#_details">More...</a>
<p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Data Structures</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">struct </td><td class="memItemRight" valign="bottom"><a class="el" href="structvbi__xds__packet.html">vbi_xds_packet</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">XDS Packet. A pointer to this structure is passed to the XDS demux callback. <a href="structvbi__xds__packet.html#_details">More...</a><br></td></tr>
<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="g43073bd2163c668997eae6672e6c70f5"></a><!-- doxytag: member="XDSDemux::VBI_XDS_MAX_CLASSES" ref="g43073bd2163c668997eae6672e6c70f5" args="" -->
#define </td><td class="memItemRight" valign="bottom"><b>VBI_XDS_MAX_CLASSES</b> (VBI_XDS_CLASS_UNDEFINED + 1)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="g59644e3bfc416752ee1087525306804b"></a><!-- doxytag: member="XDSDemux::VBI_XDS_MAX_SUBCLASSES" ref="g59644e3bfc416752ee1087525306804b" args="" -->
#define </td><td class="memItemRight" valign="bottom"><b>VBI_XDS_MAX_SUBCLASSES</b> (0x18)</td></tr>
<tr><td colspan="2"><br><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="anchor" name="gf80f7d4ac1f11029e8c6cc353ec09098"></a><!-- doxytag: member="XDSDemux::vbi_xds_subclass" ref="gf80f7d4ac1f11029e8c6cc353ec09098" args="" -->
typedef unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#gf80f7d4ac1f11029e8c6cc353ec09098">vbi_xds_subclass</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Generic XDS subclass. You must cast to the appropriate subclass type depending on the XDS class. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef struct _vbi_xds_demux </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">XDS demultiplexer. <a href="#gccdbd208cea6c673ec3fa133d2e3f70e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef vbi_bool </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#ga0dd8918645dc421d162de2f6cfb96fd">vbi_xds_demux_cb</a> (<a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> *xd, const <a class="el" href="structvbi__xds__packet.html">vbi_xds_packet</a> *xp, void *user_data)</td></tr>
<tr><td colspan="2"><br><h2>Enumerations</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#gbcd0a93a9fdda213b25e118bce82bc7c">vbi_xds_class</a> { <br>
<b>VBI_XDS_CLASS_CURRENT</b> = 0x00,
<br>
<b>VBI_XDS_CLASS_FUTURE</b>,
<br>
<b>VBI_XDS_CLASS_CHANNEL</b>,
<br>
<b>VBI_XDS_CLASS_MISC</b>,
<br>
<b>VBI_XDS_CLASS_PUBLIC_SERVICE</b>,
<br>
<b>VBI_XDS_CLASS_RESERVED</b>,
<br>
<b>VBI_XDS_CLASS_UNDEFINED</b>
<br>
}</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">XDS packet class. XDS data is transmitted in packets. Each packet belongs to one of seven classes. <br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#g764e42b5ff94755be0eec8f009b5ce1d">vbi_xds_subclass_program</a> { <br>
<b>VBI_XDS_PROGRAM_ID</b> = 0x01,
<br>
<b>VBI_XDS_PROGRAM_LENGTH</b>,
<br>
<b>VBI_XDS_PROGRAM_NAME</b>,
<br>
<b>VBI_XDS_PROGRAM_TYPE</b>,
<br>
<b>VBI_XDS_PROGRAM_RATING</b>,
<br>
<b>VBI_XDS_PROGRAM_AUDIO_SERVICES</b>,
<br>
<b>VBI_XDS_PROGRAM_CAPTION_SERVICES</b>,
<br>
<b>VBI_XDS_PROGRAM_CGMS</b>,
<br>
<b>VBI_XDS_PROGRAM_ASPECT_RATIO</b>,
<br>
<a class="el" href="group__XDSDemux.html#gg764e42b5ff94755be0eec8f009b5ce1d978fdffe96ff347f1a7de41ca3274043">VBI_XDS_PROGRAM_DATA</a> = 0x0C,
<br>
<a class="el" href="group__XDSDemux.html#gg764e42b5ff94755be0eec8f009b5ce1dbcc6aab74fdea4f263b07d6fcfcc6c04">VBI_XDS_PROGRAM_MISC_DATA</a>,
<br>
<b>VBI_XDS_PROGRAM_DESCRIPTION_BEGIN</b> = 0x10,
<br>
<b>VBI_XDS_PROGRAM_DESCRIPTION_END</b> = 0x18
<br>
}</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><code>VBI_XDS_CLASS_CURRENT</code> and <code>VBI_XDS_CLASS_FUTURE</code> subclass. <a href="group__XDSDemux.html#g764e42b5ff94755be0eec8f009b5ce1d">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#gb9db43be83b075b0d321cdb0b70ade9b">vbi_xds_subclass_channel</a> { <br>
<b>VBI_XDS_CHANNEL_NAME</b> = 0x01,
<br>
<b>VBI_XDS_CHANNEL_CALL_LETTERS</b>,
<br>
<b>VBI_XDS_CHANNEL_TAPE_DELAY</b>,
<br>
<a class="el" href="group__XDSDemux.html#ggb9db43be83b075b0d321cdb0b70ade9beb0c7390eaecb759488dbe63f1bc3be8">VBI_XDS_CHANNEL_TSID</a>
<br>
}</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><code>VBI_XDS_CLASS_CHANNEL</code> subclass. <a href="group__XDSDemux.html#gb9db43be83b075b0d321cdb0b70ade9b">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#g13c3033e14fcddc005218a1df2f2c60e">vbi_xds_subclass_misc</a> { <br>
<b>VBI_XDS_TIME_OF_DAY</b> = 0x01,
<br>
<b>VBI_XDS_IMPULSE_CAPTURE_ID</b>,
<br>
<b>VBI_XDS_SUPPLEMENTAL_DATA_LOCATION</b>,
<br>
<b>VBI_XDS_LOCAL_TIME_ZONE</b>,
<br>
<a class="el" href="group__XDSDemux.html#gg13c3033e14fcddc005218a1df2f2c60ebd9abc69bc4042c7b7d82d292361e73f">VBI_XDS_OUT_OF_BAND_CHANNEL</a> = 0x40,
<br>
<a class="el" href="group__XDSDemux.html#gg13c3033e14fcddc005218a1df2f2c60ee42f9efd102d24a4dbcb12b6b90737ed">VBI_XDS_CHANNEL_MAP_POINTER</a>,
<br>
<a class="el" href="group__XDSDemux.html#gg13c3033e14fcddc005218a1df2f2c60e2eeb0755a9406e2cc64c7d7b81cb2148">VBI_XDS_CHANNEL_MAP_HEADER</a>,
<br>
<a class="el" href="group__XDSDemux.html#gg13c3033e14fcddc005218a1df2f2c60eb5c02b6e751b4f2ffdd1c901c17b46a5">VBI_XDS_CHANNEL_MAP</a>
<br>
}</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><code>VBI_XDS_CLASS_MISC</code> subclass. <a href="group__XDSDemux.html#g13c3033e14fcddc005218a1df2f2c60e">More...</a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">enum </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#g36afd77b60d2282e584a261cdb3bef12">vbi_xds_subclass_public_service</a> { <br>
<b>VBI_XDS_WEATHER_BULLETIN</b> = 0x01,
<br>
<b>VBI_XDS_WEATHER_MESSAGE</b>
<br>
}</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight"><code>VBI_XDS_CLASS_PUBLIC_SERVICE</code> subclass. <a href="group__XDSDemux.html#g36afd77b60d2282e584a261cdb3bef12">More...</a><br></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#g599eebd6387c558c642134517284ceac">vbi_xds_demux_reset</a> (<a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> *xd)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">vbi_bool </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#gb46df46f3dfcc51c605a618ecbdac01f">vbi_xds_demux_feed</a> (<a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> *xd, const uint8_t buffer[2])</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">vbi_bool </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#g99411493fff962747c0ac1d3951cfdd4">vbi_xds_demux_feed_frame</a> (<a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> *xd, const <a class="el" href="structvbi__sliced.html">vbi_sliced</a> *sliced, unsigned int n_lines)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#gbcc365131c37b0c31a8865d3e056fe29">vbi_xds_demux_delete</a> (<a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> *xd)</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"><a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new</a> (<a class="el" href="group__XDSDemux.html#ga0dd8918645dc421d162de2f6cfb96fd">vbi_xds_demux_cb</a> *callback, void *user_data) _vbi_alloc</td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Separating XDS data from a Closed Caption stream (EIA 608). <hr><h2>Typedef Documentation</h2>
<a class="anchor" name="gccdbd208cea6c673ec3fa133d2e3f70e"></a><!-- doxytag: member="xds_demux.h::vbi_xds_demux" ref="gccdbd208cea6c673ec3fa133d2e3f70e" args="" -->
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<td class="memname">typedef struct _vbi_xds_demux <a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> </td>
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<div class="memdoc">
<p>
XDS demultiplexer.
<p>
The contents of this structure are private. Call <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a> to allocate a XDS demultiplexer.
</div>
</div><p>
<a class="anchor" name="ga0dd8918645dc421d162de2f6cfb96fd"></a><!-- doxytag: member="xds_demux.h::vbi_xds_demux_cb" ref="ga0dd8918645dc421d162de2f6cfb96fd" args="(vbi_xds_demux *xd, const vbi_xds_packet *xp, void *user_data)" -->
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<td class="memname">typedef vbi_bool <a class="el" href="group__XDSDemux.html#ga0dd8918645dc421d162de2f6cfb96fd">vbi_xds_demux_cb</a>(<a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> *xd, const <a class="el" href="structvbi__xds__packet.html">vbi_xds_packet</a> *xp, void *user_data) </td>
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<div class="memdoc">
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>xd</em> </td><td>XDS demultiplexer context allocated with <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a>. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>user_data</em> </td><td>User data pointer given to <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a>. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>xp</em> </td><td>Pointer to the received XDS data packet.</td></tr>
</table>
</dl>
The XDS demux calls a function of this type when an XDS packet has been completely received, all bytes have correct parity and the packet checksum is correct. Other packets are discarded.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>FALSE on error, will be returned by <a class="el" href="group__XDSDemux.html#gb46df46f3dfcc51c605a618ecbdac01f">vbi_xds_demux_feed()</a>. </dd></dl>
</div>
</div><p>
<hr><h2>Enumeration Type Documentation</h2>
<a class="anchor" name="g764e42b5ff94755be0eec8f009b5ce1d"></a><!-- doxytag: member="xds_demux.h::vbi_xds_subclass_program" ref="g764e42b5ff94755be0eec8f009b5ce1d" args="" -->
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<td class="memname">enum <a class="el" href="group__XDSDemux.html#g764e42b5ff94755be0eec8f009b5ce1d">vbi_xds_subclass_program</a> </td>
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<p>
<code>VBI_XDS_CLASS_CURRENT</code> and <code>VBI_XDS_CLASS_FUTURE</code> subclass.
<p>
<dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" name="gg764e42b5ff94755be0eec8f009b5ce1d978fdffe96ff347f1a7de41ca3274043"></a><!-- doxytag: member="VBI_XDS_PROGRAM_DATA" ref="gg764e42b5ff94755be0eec8f009b5ce1d978fdffe96ff347f1a7de41ca3274043" args="" -->VBI_XDS_PROGRAM_DATA</em> </td><td>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
</td></tr>
<tr><td valign="top"><em><a class="anchor" name="gg764e42b5ff94755be0eec8f009b5ce1dbcc6aab74fdea4f263b07d6fcfcc6c04"></a><!-- doxytag: member="VBI_XDS_PROGRAM_MISC_DATA" ref="gg764e42b5ff94755be0eec8f009b5ce1dbcc6aab74fdea4f263b07d6fcfcc6c04" args="" -->VBI_XDS_PROGRAM_MISC_DATA</em> </td><td>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
</td></tr>
</table>
</dl>
</div>
</div><p>
<a class="anchor" name="gb9db43be83b075b0d321cdb0b70ade9b"></a><!-- doxytag: member="xds_demux.h::vbi_xds_subclass_channel" ref="gb9db43be83b075b0d321cdb0b70ade9b" args="" -->
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<td class="memname">enum <a class="el" href="group__XDSDemux.html#gb9db43be83b075b0d321cdb0b70ade9b">vbi_xds_subclass_channel</a> </td>
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<p>
<code>VBI_XDS_CLASS_CHANNEL</code> subclass.
<p>
<dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" name="ggb9db43be83b075b0d321cdb0b70ade9beb0c7390eaecb759488dbe63f1bc3be8"></a><!-- doxytag: member="VBI_XDS_CHANNEL_TSID" ref="ggb9db43be83b075b0d321cdb0b70ade9beb0c7390eaecb759488dbe63f1bc3be8" args="" -->VBI_XDS_CHANNEL_TSID</em> </td><td>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
</td></tr>
</table>
</dl>
</div>
</div><p>
<a class="anchor" name="g13c3033e14fcddc005218a1df2f2c60e"></a><!-- doxytag: member="xds_demux.h::vbi_xds_subclass_misc" ref="g13c3033e14fcddc005218a1df2f2c60e" args="" -->
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<td class="memname">enum <a class="el" href="group__XDSDemux.html#g13c3033e14fcddc005218a1df2f2c60e">vbi_xds_subclass_misc</a> </td>
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<p>
<code>VBI_XDS_CLASS_MISC</code> subclass.
<p>
<dl compact><dt><b>Enumerator: </b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" name="gg13c3033e14fcddc005218a1df2f2c60ebd9abc69bc4042c7b7d82d292361e73f"></a><!-- doxytag: member="VBI_XDS_OUT_OF_BAND_CHANNEL" ref="gg13c3033e14fcddc005218a1df2f2c60ebd9abc69bc4042c7b7d82d292361e73f" args="" -->VBI_XDS_OUT_OF_BAND_CHANNEL</em> </td><td>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
</td></tr>
<tr><td valign="top"><em><a class="anchor" name="gg13c3033e14fcddc005218a1df2f2c60ee42f9efd102d24a4dbcb12b6b90737ed"></a><!-- doxytag: member="VBI_XDS_CHANNEL_MAP_POINTER" ref="gg13c3033e14fcddc005218a1df2f2c60ee42f9efd102d24a4dbcb12b6b90737ed" args="" -->VBI_XDS_CHANNEL_MAP_POINTER</em> </td><td>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
</td></tr>
<tr><td valign="top"><em><a class="anchor" name="gg13c3033e14fcddc005218a1df2f2c60e2eeb0755a9406e2cc64c7d7b81cb2148"></a><!-- doxytag: member="VBI_XDS_CHANNEL_MAP_HEADER" ref="gg13c3033e14fcddc005218a1df2f2c60e2eeb0755a9406e2cc64c7d7b81cb2148" args="" -->VBI_XDS_CHANNEL_MAP_HEADER</em> </td><td>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
</td></tr>
<tr><td valign="top"><em><a class="anchor" name="gg13c3033e14fcddc005218a1df2f2c60eb5c02b6e751b4f2ffdd1c901c17b46a5"></a><!-- doxytag: member="VBI_XDS_CHANNEL_MAP" ref="gg13c3033e14fcddc005218a1df2f2c60eb5c02b6e751b4f2ffdd1c901c17b46a5" args="" -->VBI_XDS_CHANNEL_MAP</em> </td><td>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
</td></tr>
</table>
</dl>
</div>
</div><p>
<a class="anchor" name="g36afd77b60d2282e584a261cdb3bef12"></a><!-- doxytag: member="xds_demux.h::vbi_xds_subclass_public_service" ref="g36afd77b60d2282e584a261cdb3bef12" args="" -->
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<td class="memname">enum <a class="el" href="group__XDSDemux.html#g36afd77b60d2282e584a261cdb3bef12">vbi_xds_subclass_public_service</a> </td>
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<code>VBI_XDS_CLASS_PUBLIC_SERVICE</code> subclass.
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<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.17 </dd></dl>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="g599eebd6387c558c642134517284ceac"></a><!-- doxytag: member="xds_demux.h::vbi_xds_demux_reset" ref="g599eebd6387c558c642134517284ceac" args="(vbi_xds_demux *xd)" -->
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<td class="memname">void vbi_xds_demux_reset </td>
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<td class="paramtype"><a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> * </td>
<td class="paramname"> <em>xd</em> </td>
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>xd</em> </td><td>XDS demultiplexer context allocated with <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a>.</td></tr>
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Resets the XDS demux, useful for example after a channel change.<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.16 </dd></dl>
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<a class="anchor" name="gb46df46f3dfcc51c605a618ecbdac01f"></a><!-- doxytag: member="xds_demux.h::vbi_xds_demux_feed" ref="gb46df46f3dfcc51c605a618ecbdac01f" args="(vbi_xds_demux *xd, const uint8_t buffer[2])" -->
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<td class="memname">vbi_bool vbi_xds_demux_feed </td>
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<td class="paramtype"><a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> * </td>
<td class="paramname"> <em>xd</em>, </td>
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<td class="paramtype">const uint8_t </td>
<td class="paramname"> <em>buffer</em>[2]</td><td> </td>
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>xd</em> </td><td>XDS demultiplexer context allocated with <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a>. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>buffer</em> </td><td>Closed Caption character pair, as in struct <a class="el" href="structvbi__sliced.html" title="This structure holds one scan line of sliced vbi data.">vbi_sliced</a>.</td></tr>
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This function takes two successive bytes of a raw Closed Caption stream, filters out XDS data and calls the output function given to <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a> when a new packet is complete.<p>
You should feed only data from NTSC line 284.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd><code>FALSE</code> if the buffer contained parity errors.</dd></dl>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.16 </dd></dl>
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<a class="anchor" name="g99411493fff962747c0ac1d3951cfdd4"></a><!-- doxytag: member="xds_demux.h::vbi_xds_demux_feed_frame" ref="g99411493fff962747c0ac1d3951cfdd4" args="(vbi_xds_demux *xd, const vbi_sliced *sliced, unsigned int n_lines)" -->
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<td class="memname">vbi_bool vbi_xds_demux_feed_frame </td>
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<td class="paramtype"><a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> * </td>
<td class="paramname"> <em>xd</em>, </td>
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<td class="paramtype">const <a class="el" href="structvbi__sliced.html">vbi_sliced</a> * </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>n_lines</em></td><td> </td>
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>xd</em> </td><td>XDS demultiplexer context allocated with <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a>. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>sliced</em> </td><td>Sliced VBI data. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>n_lines</em> </td><td>Number of lines in the <em>sliced</em> array.</td></tr>
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This function works like <a class="el" href="group__XDSDemux.html#gb46df46f3dfcc51c605a618ecbdac01f">vbi_xds_demux_feed()</a> but operates on sliced VBI data and filters out <code>VBI_SLICED_CAPTION_525</code> on NTSC line 284.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd><code>FALSE</code> if any of the Caption lines contained parity errors.</dd></dl>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.26 </dd></dl>
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<a class="anchor" name="gbcc365131c37b0c31a8865d3e056fe29"></a><!-- doxytag: member="xds_demux.h::vbi_xds_demux_delete" ref="gbcc365131c37b0c31a8865d3e056fe29" args="(vbi_xds_demux *xd)" -->
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<td class="memname">void vbi_xds_demux_delete </td>
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<td class="paramtype"><a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a> * </td>
<td class="paramname"> <em>xd</em> </td>
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<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>xd</em> </td><td>XDS demultiplexer context allocated with <a class="el" href="group__XDSDemux.html#g498a7d3ad192ada657541e58ce150a62">vbi_xds_demux_new()</a>, can be <code>NULL</code>.</td></tr>
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Frees all resources associated with <em>xd</em>.<p>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.16 </dd></dl>
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<a class="anchor" name="g498a7d3ad192ada657541e58ce150a62"></a><!-- doxytag: member="xds_demux.h::vbi_xds_demux_new" ref="g498a7d3ad192ada657541e58ce150a62" args="(vbi_xds_demux_cb *callback, void *user_data) _vbi_alloc" -->
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<td class="memname"><a class="el" href="group__XDSDemux.html#gccdbd208cea6c673ec3fa133d2e3f70e">vbi_xds_demux</a>* vbi_xds_demux_new </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__XDSDemux.html#ga0dd8918645dc421d162de2f6cfb96fd">vbi_xds_demux_cb</a> * </td>
<td class="paramname"> <em>callback</em>, </td>
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<td class="paramtype">void * </td>
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"></td><td valign="top"><em>callback</em> </td><td>Function to be called by <a class="el" href="group__XDSDemux.html#gb46df46f3dfcc51c605a618ecbdac01f">vbi_xds_demux_feed()</a> when a new packet is available. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>user_data</em> </td><td>User pointer passed through to <em>callback</em> function.</td></tr>
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Allocates a new Extended Data Service (EIA 608) demultiplexer.<p>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>Pointer to newly allocated XDS demux context which must be freed with <a class="el" href="group__XDSDemux.html#gbcc365131c37b0c31a8865d3e056fe29">vbi_xds_demux_delete()</a> when done. <code>NULL</code> on failure (out of memory).</dd></dl>
<dl class="since" compact><dt><b>Since:</b></dt><dd>0.2.16 </dd></dl>
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