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| <a href="#gst-plugins-base-libs-gstcolorbalance.synopsis" class="shortcut">Top</a> |
| | |
| <a href="#gst-plugins-base-libs-gstcolorbalance.description" class="shortcut">Description</a> |
| | |
| <a href="#gst-plugins-base-libs-gstcolorbalance.object-hierarchy" class="shortcut">Object Hierarchy</a> |
| | |
| <a href="#gst-plugins-base-libs-gstcolorbalance.signals" class="shortcut">Signals</a> |
| </td></tr> |
| </table> |
| <div class="refentry"> |
| <a name="gst-plugins-base-libs-gstcolorbalance"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstcolorbalance.top_of_page"></a>gstcolorbalance</span></h2> |
| <p>gstcolorbalance — Interface for adjusting color balance settings</p> |
| </td> |
| <td valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsynopsisdiv"> |
| <a name="gst-plugins-base-libs-gstcolorbalance.synopsis"></a><h2>Synopsis</h2> |
| <a name="GstColorBalance"></a><pre class="synopsis"> |
| #include <gst/video/colorbalance.h> |
| |
| <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance-struct" title="GstColorBalance">GstColorBalance</a>; |
| struct <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalanceInterface" title="struct GstColorBalanceInterface">GstColorBalanceInterface</a>; |
| enum <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalanceType" title="enum GstColorBalanceType">GstColorBalanceType</a>; |
| const <a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> * <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#gst-color-balance-list-channels" title="gst_color_balance_list_channels ()">gst_color_balance_list_channels</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#gst-color-balance-get-value" title="gst_color_balance_get_value ()">gst_color_balance_get_value</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> *channel</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#gst-color-balance-set-value" title="gst_color_balance_set_value ()">gst_color_balance_set_value</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> *channel</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> value</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#gst-color-balance-value-changed" title="gst_color_balance_value_changed ()">gst_color_balance_value_changed</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> *channel</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> value</code></em>); |
| <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalanceType" title="enum GstColorBalanceType"><span class="returnvalue">GstColorBalanceType</span></a> <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#gst-color-balance-get-balance-type" title="gst_color_balance_get_balance_type ()">gst_color_balance_get_balance_type</a> (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstcolorbalance.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="synopsis"> |
| GInterface |
| +----GstColorBalance |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstcolorbalance.signals"></a><h2>Signals</h2> |
| <pre class="synopsis"> |
| "<a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance-value-changed" title='The "value-changed" signal'>value-changed</a>" : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstcolorbalance.description"></a><h2>Description</h2> |
| <p> |
| </p> |
| <div class="refsect2"> |
| <a name="idp80218080"></a><p> |
| This interface is implemented by elements which can perform some color |
| balance operation on video frames they process. For example, modifying |
| the brightness, contrast, hue or saturation. |
| </p> |
| <p> |
| Example elements are 'xvimagesink' and 'colorbalance' |
| </p> |
| </div> |
| <p> |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstcolorbalance.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="GstColorBalance-struct"></a><h3>GstColorBalance</h3> |
| <pre class="programlisting">typedef struct _GstColorBalance GstColorBalance;</pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstColorBalanceInterface"></a><h3>struct GstColorBalanceInterface</h3> |
| <pre class="programlisting">struct GstColorBalanceInterface { |
| GTypeInterface iface; |
| |
| /* virtual functions */ |
| const GList * (* list_channels) (GstColorBalance *balance); |
| |
| void (* set_value) (GstColorBalance *balance, |
| GstColorBalanceChannel *channel, |
| gint value); |
| gint (* get_value) (GstColorBalance *balance, |
| GstColorBalanceChannel *channel); |
| GstColorBalanceType (*get_balance_type) (GstColorBalance *balance); |
| |
| /* signals */ |
| void (* value_changed) (GstColorBalance *balance, |
| GstColorBalanceChannel *channel, |
| gint value); |
| }; |
| </pre> |
| <p> |
| Color-balance interface. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Type-Information.html#GTypeInterface"><span class="type">GTypeInterface</span></a> <em class="structfield"><code><a name="GstColorBalanceInterface.iface"></a>iface</code></em>;</span></p></td> |
| <td>the parent interface</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstColorBalanceInterface.list-channels"></a>list_channels</code></em> ()</span></p></td> |
| <td>list handled channels</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstColorBalanceInterface.set-value"></a>set_value</code></em> ()</span></p></td> |
| <td>set a channel value</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstColorBalanceInterface.get-value"></a>get_value</code></em> ()</span></p></td> |
| <td>get a channel value</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstColorBalanceInterface.get-balance-type"></a>get_balance_type</code></em> ()</span></p></td> |
| <td></td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstColorBalanceInterface.value-changed"></a>value_changed</code></em> ()</span></p></td> |
| <td>default handler for value changed notification</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstColorBalanceType"></a><h3>enum GstColorBalanceType</h3> |
| <pre class="programlisting">typedef enum { |
| GST_COLOR_BALANCE_HARDWARE, |
| GST_COLOR_BALANCE_SOFTWARE |
| } GstColorBalanceType; |
| </pre> |
| <p> |
| An enumeration indicating whether an element implements color balancing |
| operations in software or in dedicated hardware. In general, dedicated |
| hardware implementations (such as those provided by xvimagesink) are |
| preferred. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><a name="GST-COLOR-BALANCE-HARDWARE:CAPS"></a><span class="term"><code class="literal">GST_COLOR_BALANCE_HARDWARE</code></span></p></td> |
| <td>Color balance is implemented with dedicated |
| hardware. |
| </td> |
| </tr> |
| <tr> |
| <td><p><a name="GST-COLOR-BALANCE-SOFTWARE:CAPS"></a><span class="term"><code class="literal">GST_COLOR_BALANCE_SOFTWARE</code></span></p></td> |
| <td>Color balance is implemented via software |
| processing. |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-color-balance-list-channels"></a><h3>gst_color_balance_list_channels ()</h3> |
| <pre class="programlisting">const <a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> * gst_color_balance_list_channels (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>);</pre> |
| <p> |
| Retrieve a list of the available channels. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>balance</code></em> :</span></p></td> |
| <td>A <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> instance</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>A GList containing pointers to <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> objects. |
| The list is owned by the <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> instance and must not |
| be freed.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-color-balance-get-value"></a><h3>gst_color_balance_get_value ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> gst_color_balance_get_value (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> *channel</code></em>);</pre> |
| <p> |
| Retrieve the current value of the indicated channel, between min_value |
| and max_value. |
| </p> |
| <p> |
| See Also: The <span class="type">GstColorBalanceChannel.min_value</span> and |
| <span class="type">GstColorBalanceChannel.max_value</span> members of the |
| <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> object. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>balance</code></em> :</span></p></td> |
| <td>A <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> instance</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channel</code></em> :</span></p></td> |
| <td>A <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> instance</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>The current value of the channel.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-color-balance-set-value"></a><h3>gst_color_balance_set_value ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_color_balance_set_value (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> *channel</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> value</code></em>);</pre> |
| <p> |
| Sets the current value of the channel to the passed value, which must |
| be between min_value and max_value. |
| </p> |
| <p> |
| See Also: The <span class="type">GstColorBalanceChannel.min_value</span> and |
| <span class="type">GstColorBalanceChannel.max_value</span> members of the |
| <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> object. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>balance</code></em> :</span></p></td> |
| <td>A <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> instance</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channel</code></em> :</span></p></td> |
| <td>A <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> instance</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td> |
| <td>The new value for the channel.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-color-balance-value-changed"></a><h3>gst_color_balance_value_changed ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_color_balance_value_changed (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>, |
| <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> *channel</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> value</code></em>);</pre> |
| <p> |
| A helper function called by implementations of the GstColorBalance |
| interface. It fires the <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance-value-changed" title='The "value-changed" signal'><span class="type">"value-changed"</span></a> signal on the |
| instance, and the <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel-value-changed" title='The "value-changed" signal'><span class="type">"value-changed"</span></a> signal on the |
| channel object. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>balance</code></em> :</span></p></td> |
| <td>A <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> instance</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channel</code></em> :</span></p></td> |
| <td>A <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> whose value has changed</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td> |
| <td>The new value of the channel</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-color-balance-get-balance-type"></a><h3>gst_color_balance_get_balance_type ()</h3> |
| <pre class="programlisting"><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalanceType" title="enum GstColorBalanceType"><span class="returnvalue">GstColorBalanceType</span></a> gst_color_balance_get_balance_type (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *balance</code></em>);</pre> |
| <p> |
| Get the <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalanceType" title="enum GstColorBalanceType"><span class="type">GstColorBalanceType</span></a> of this implementation. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>balance</code></em> :</span></p></td> |
| <td>The <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> implementation</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>A the <a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalanceType" title="enum GstColorBalanceType"><span class="type">GstColorBalanceType</span></a>.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstcolorbalance.signal-details"></a><h2>Signal Details</h2> |
| <div class="refsect2"> |
| <a name="GstColorBalance-value-changed"></a><h3>The <code class="literal">"value-changed"</code> signal</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> user_function (<a class="link" href="gst-plugins-base-libs-gstcolorbalance.html#GstColorBalance"><span class="type">GstColorBalance</span></a> *colorbalance, |
| <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> *channel, |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="type">gint</span></a> value, |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data) : <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">Run Last</code></a></pre> |
| <p> |
| Fired when the value of the indicated channel has changed. |
| </p> |
| <div class="variablelist"><table border="0" class="variablelist"> |
| <colgroup> |
| <col align="left" valign="top"> |
| <col> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>colorbalance</code></em> :</span></p></td> |
| <td>The GstColorBalance instance</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>channel</code></em> :</span></p></td> |
| <td>The <a class="link" href="gst-plugins-base-libs-gstcolorbalancechannel.html#GstColorBalanceChannel"><span class="type">GstColorBalanceChannel</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>value</code></em> :</span></p></td> |
| <td>The new value</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td> |
| <td>user data set when the signal handler was connected.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
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