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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>GstBtPropertyMeta</title>
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                  <a href="#gst-buzztard-GstBtPropertyMeta.description" class="shortcut">Description</a>
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<div class="refentry" title="GstBtPropertyMeta">
<a name="gst-buzztard-GstBtPropertyMeta"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-buzztard-GstBtPropertyMeta.top_of_page"></a>GstBtPropertyMeta</span></h2>
<p>GstBtPropertyMeta — helper interface for extended gstreamer element meta data</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="gst-buzztard-GstBtPropertyMeta.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">enum                <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#GstBtPropertyMetaFlags" title="enum GstBtPropertyMetaFlags">GstBtPropertyMetaFlags</a>;
<span class="returnvalue">gchar</span> *             <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-describe-property" title="gstbt_property_meta_describe_property ()">gstbt_property_meta_describe_property</a>
                                                        (<em class="parameter"><code><span class="type">GstBtPropertyMeta</span> *self</code></em>,
                                                         <em class="parameter"><code><span class="type">glong</span> index</code></em>,
                                                         <em class="parameter"><code><span class="type">GValue</span> *value</code></em>);
extern              GQuark <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-quark" title="gstbt_property_meta_quark">gstbt_property_meta_quark</a>;
extern              GQuark <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-quark-min-val" title="gstbt_property_meta_quark_min_val">gstbt_property_meta_quark_min_val</a>;
extern              GQuark <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-quark-max-val" title="gstbt_property_meta_quark_max_val">gstbt_property_meta_quark_max_val</a>;
extern              GQuark <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-quark-def-val" title="gstbt_property_meta_quark_def_val">gstbt_property_meta_quark_def_val</a>;
extern              GQuark <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-quark-no-val" title="gstbt_property_meta_quark_no_val">gstbt_property_meta_quark_no_val</a>;
extern              GQuark <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-quark-flags" title="gstbt_property_meta_quark_flags">gstbt_property_meta_quark_flags</a>;
</pre>
</div>
<div class="refsect1" title="Description">
<a name="gst-buzztard-GstBtPropertyMeta.description"></a><h2>Description</h2>
<p>
This interface standardises some additional meta-data that is attached to
<span class="type">GObject</span> properties.
</p>
<p>
Furthermore it adds the <a class="link" href="gst-buzztard-GstBtPropertyMeta.html#gstbt-property-meta-describe-property" title="gstbt_property_meta_describe_property ()"><code class="function">gstbt_property_meta_describe_property()</code></a> method that
builds a string description of a property value.
</p>
</div>
<div class="refsect1" title="Details">
<a name="gst-buzztard-GstBtPropertyMeta.details"></a><h2>Details</h2>
<div class="refsect2" title="enum GstBtPropertyMetaFlags">
<a name="GstBtPropertyMetaFlags"></a><h3>enum GstBtPropertyMetaFlags</h3>
<pre class="programlisting">typedef enum {
  GSTBT_PROPERTY_META_NONE=0,
  GSTBT_PROPERTY_META_WAVE=1,		/* parameter value references a wavetable slot */
  GSTBT_PROPERTY_META_STATE=2,		/* parameter is continuously changing (not used for notes and triggers) */
  GSTBT_PROPERTY_META_TICK_ON_EDIT=4 /* causes the host to send you a Tick() message immediatly after the user enters a value in the pattern or machine editor */
} GstBtPropertyMetaFlags;
</pre>
<p>
Parameter flags to describe their behaviour.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><a name="GSTBT-PROPERTY-META-NONE:CAPS"></a><span class="term"><code class="literal">GSTBT_PROPERTY_META_NONE</code></span></p></td>
<td>no special treatment needed
</td>
</tr>
<tr>
<td><p><a name="GSTBT-PROPERTY-META-WAVE:CAPS"></a><span class="term"><code class="literal">GSTBT_PROPERTY_META_WAVE</code></span></p></td>
<td>parameter value references a wavetable slot
</td>
</tr>
<tr>
<td><p><a name="GSTBT-PROPERTY-META-STATE:CAPS"></a><span class="term"><code class="literal">GSTBT_PROPERTY_META_STATE</code></span></p></td>
<td>parameter is continuously changing (not used for notes and triggers)
</td>
</tr>
<tr>
<td><p><a name="GSTBT-PROPERTY-META-TICK-ON-EDIT:CAPS"></a><span class="term"><code class="literal">GSTBT_PROPERTY_META_TICK_ON_EDIT</code></span></p></td>
<td>need to call tick after editing it
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gstbt_property_meta_describe_property ()">
<a name="gstbt-property-meta-describe-property"></a><h3>gstbt_property_meta_describe_property ()</h3>
<pre class="programlisting"><span class="returnvalue">gchar</span> *             gstbt_property_meta_describe_property
                                                        (<em class="parameter"><code><span class="type">GstBtPropertyMeta</span> *self</code></em>,
                                                         <em class="parameter"><code><span class="type">glong</span> index</code></em>,
                                                         <em class="parameter"><code><span class="type">GValue</span> *value</code></em>);</pre>
<p>
Formats the gives value as a human readable string. The method is useful to
display a property value in a user interface.
It privides a default implementation.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>self</code></em> :</span></p></td>
<td>a <span class="type">GObject</span> that implements <span class="type">GstBtPropertyMeta</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>index</code></em> :</span></p></td>
<td>the property index
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td>
<td>the current property value
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> a string with the value in humand readable form, free memory when
done
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="gstbt_property_meta_quark">
<a name="gstbt-property-meta-quark"></a><h3>gstbt_property_meta_quark</h3>
<pre class="programlisting">extern GQuark gstbt_property_meta_quark;
</pre>
<p>
Only if this is set to TRUE, there is property meta data for this property..
</p>
</div>
<hr>
<div class="refsect2" title="gstbt_property_meta_quark_min_val">
<a name="gstbt-property-meta-quark-min-val"></a><h3>gstbt_property_meta_quark_min_val</h3>
<pre class="programlisting">extern GQuark gstbt_property_meta_quark_min_val;
</pre>
<p>
Minimum property value (excluding default and no-value).
</p>
</div>
<hr>
<div class="refsect2" title="gstbt_property_meta_quark_max_val">
<a name="gstbt-property-meta-quark-max-val"></a><h3>gstbt_property_meta_quark_max_val</h3>
<pre class="programlisting">extern GQuark gstbt_property_meta_quark_max_val;
</pre>
<p>
Maximum property value (excluding default and no-value).
</p>
</div>
<hr>
<div class="refsect2" title="gstbt_property_meta_quark_def_val">
<a name="gstbt-property-meta-quark-def-val"></a><h3>gstbt_property_meta_quark_def_val</h3>
<pre class="programlisting">extern GQuark gstbt_property_meta_quark_def_val;
</pre>
<p>
Default property value (used initialy).
</p>
</div>
<hr>
<div class="refsect2" title="gstbt_property_meta_quark_no_val">
<a name="gstbt-property-meta-quark-no-val"></a><h3>gstbt_property_meta_quark_no_val</h3>
<pre class="programlisting">extern GQuark gstbt_property_meta_quark_no_val;
</pre>
<p>
Property value (used in trigger style properties, when there is no current
value)
</p>
</div>
<hr>
<div class="refsect2" title="gstbt_property_meta_quark_flags">
<a name="gstbt-property-meta-quark-flags"></a><h3>gstbt_property_meta_quark_flags</h3>
<pre class="programlisting">extern GQuark gstbt_property_meta_quark_flags;
</pre>
<p>
Application specific flags giving more hints about the property.
</p>
</div>
</div>
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