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| <a href="#gstreamer-libs-GstDataQueue.description" class="shortcut">Description</a> |
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| <a name="gstreamer-libs-GstDataQueue"></a><div class="titlepage"></div> |
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| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gstreamer-libs-GstDataQueue.top_of_page"></a>GstDataQueue</span></h2> |
| <p>GstDataQueue — Threadsafe queueing object</p> |
| </td> |
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| <div class="refsynopsisdiv"> |
| <a name="gstreamer-libs-GstDataQueue.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> |
| #include <gst/base/gstdataqueue.h> |
| |
| struct <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue">GstDataQueue</a>; |
| struct <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueSize" title="struct GstDataQueueSize">GstDataQueueSize</a>; |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (<a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueCheckFullFunction" title="GstDataQueueCheckFullFunction ()">*GstDataQueueCheckFullFunction</a>) (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> visible</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> bytes</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> time</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>); |
| struct <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem">GstDataQueueItem</a>; |
| <span class="returnvalue">void</span> (<a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueEmptyCallback" title="GstDataQueueEmptyCallback ()">*GstDataQueueEmptyCallback</a>) (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>); |
| <span class="returnvalue">void</span> (<a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueFullCallback" title="GstDataQueueFullCallback ()">*GstDataQueueFullCallback</a>) (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>); |
| <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="returnvalue">GstDataQueue</span></a> * <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-new" title="gst_data_queue_new ()">gst_data_queue_new</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueCheckFullFunction" title="GstDataQueueCheckFullFunction ()"><span class="type">GstDataQueueCheckFullFunction</span></a> checkfull</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueFullCallback" title="GstDataQueueFullCallback ()"><span class="type">GstDataQueueFullCallback</span></a> fullcallback</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueEmptyCallback" title="GstDataQueueEmptyCallback ()"><span class="type">GstDataQueueEmptyCallback</span></a> emptycallback</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-push" title="gst_data_queue_push ()">gst_data_queue_push</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> *item</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-push-force" title="gst_data_queue_push_force ()">gst_data_queue_push_force</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> *item</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-pop" title="gst_data_queue_pop ()">gst_data_queue_pop</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> **item</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-flush" title="gst_data_queue_flush ()">gst_data_queue_flush</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-set-flushing" title="gst_data_queue_set_flushing ()">gst_data_queue_set_flushing</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> flushing</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-drop-head" title="gst_data_queue_drop_head ()">gst_data_queue_drop_head</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Type-Information.html#GType"><span class="type">GType</span></a> type</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-is-full" title="gst_data_queue_is_full ()">gst_data_queue_is_full</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-is-empty" title="gst_data_queue_is_empty ()">gst_data_queue_is_empty</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-get-level" title="gst_data_queue_get_level ()">gst_data_queue_get_level</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueSize" title="struct GstDataQueueSize"><span class="type">GstDataQueueSize</span></a> *level</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-limits-changed" title="gst_data_queue_limits_changed ()">gst_data_queue_limits_changed</a> (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>); |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-libs-GstDataQueue.description"></a><h2>Description</h2> |
| <p> |
| <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> is an object that handles threadsafe queueing of objects. It |
| also provides size-related functionality. This object should be used for |
| any <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html"><span class="type">GstElement</span></a> that wishes to provide some sort of queueing functionality. |
| </p> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-libs-GstDataQueue.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="GstDataQueue"></a><h3>struct GstDataQueue</h3> |
| <pre class="programlisting">struct GstDataQueue { |
| GObject object; |
| }; |
| </pre> |
| <p> |
| Opaque <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> structure. |
| </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-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> <em class="structfield"><code><a name="GstDataQueue.object"></a>object</code></em>;</span></p></td> |
| <td>the parent structure</td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstDataQueueSize"></a><h3>struct GstDataQueueSize</h3> |
| <pre class="programlisting">struct GstDataQueueSize { |
| guint visible; |
| guint bytes; |
| guint64 time; |
| }; |
| </pre> |
| <p> |
| Structure describing the size of a queue. |
| </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/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GstDataQueueSize.visible"></a>visible</code></em>;</span></p></td> |
| <td>number of buffers</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GstDataQueueSize.bytes"></a>bytes</code></em>;</span></p></td> |
| <td>number of bytes</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="type">guint64</span> <em class="structfield"><code><a name="GstDataQueueSize.time"></a>time</code></em>;</span></p></td> |
| <td>amount of time</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstDataQueueCheckFullFunction"></a><h3>GstDataQueueCheckFullFunction ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (*GstDataQueueCheckFullFunction) (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> visible</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> bytes</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> time</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>);</pre> |
| <p> |
| The prototype of the function used to inform the queue that it should be |
| considered as full. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>visible</code></em> :</span></p></td> |
| <td>The number of visible items currently in the queue.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>bytes</code></em> :</span></p></td> |
| <td>The amount of bytes currently in the queue.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>time</code></em> :</span></p></td> |
| <td>The accumulated duration of the items currently in the queue.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>checkdata</code></em> :</span></p></td> |
| <td>The <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> registered when the <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> was created.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if the queue should be considered full.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstDataQueueItem"></a><h3>struct GstDataQueueItem</h3> |
| <pre class="programlisting">struct GstDataQueueItem { |
| GstMiniObject *object; |
| guint size; |
| guint64 duration; |
| gboolean visible; |
| |
| /* user supplied destroy function */ |
| GDestroyNotify destroy; |
| }; |
| </pre> |
| <p> |
| Structure used by <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>. You can supply a different structure, as |
| long as the top of the structure is identical to this structure. |
| </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://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMiniObject.html#GstMiniObject"><span class="type">GstMiniObject</span></a> *<em class="structfield"><code><a name="GstDataQueueItem.object"></a>object</code></em>;</span></p></td> |
| <td>the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMiniObject.html#GstMiniObject"><span class="type">GstMiniObject</span></a> to queue.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GstDataQueueItem.size"></a>size</code></em>;</span></p></td> |
| <td>the size in bytes of the miniobject.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="type">guint64</span> <em class="structfield"><code><a name="GstDataQueueItem.duration"></a>duration</code></em>;</span></p></td> |
| <td>the duration in <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> of the miniobject. Can not be |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-TIME-NONE:CAPS"><span class="type">GST_CLOCK_TIME_NONE</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GstDataQueueItem.visible"></a>visible</code></em>;</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if <em class="parameter"><code>object</code></em> should be considered as a visible object.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> <em class="structfield"><code><a name="GstDataQueueItem.destroy"></a>destroy</code></em>;</span></p></td> |
| <td>The <a href="http://library.gnome.org/devel/glib/unstable/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> function to use to free the <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a>. |
| This function should also drop the reference to <em class="parameter"><code>object</code></em> the owner of the |
| <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> is assumed to hold.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstDataQueueEmptyCallback"></a><h3>GstDataQueueEmptyCallback ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> (*GstDataQueueEmptyCallback) (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstDataQueueFullCallback"></a><h3>GstDataQueueFullCallback ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> (*GstDataQueueFullCallback) (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>);</pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-new"></a><h3>gst_data_queue_new ()</h3> |
| <pre class="programlisting"><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="returnvalue">GstDataQueue</span></a> * gst_data_queue_new (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueCheckFullFunction" title="GstDataQueueCheckFullFunction ()"><span class="type">GstDataQueueCheckFullFunction</span></a> checkfull</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueFullCallback" title="GstDataQueueFullCallback ()"><span class="type">GstDataQueueFullCallback</span></a> fullcallback</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueEmptyCallback" title="GstDataQueueEmptyCallback ()"><span class="type">GstDataQueueEmptyCallback</span></a> emptycallback</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> checkdata</code></em>);</pre> |
| <p> |
| Creates a new <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>. The difference with <em class="parameter"><code>gst_data_queue_new</code></em> is that it will |
| not emit the 'full' and 'empty' signals, but instead calling directly <em class="parameter"><code>fullcallback</code></em> |
| or <em class="parameter"><code>emptycallback</code></em>. |
| </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>checkfull</code></em> :</span></p></td> |
| <td>the callback used to tell if the element considers the queue full |
| or not.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>fullcallback</code></em> :</span></p></td> |
| <td>the callback which will be called when the queue is considered full.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>emptycallback</code></em> :</span></p></td> |
| <td>the callback which will be called when the queue is considered empty.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>checkdata</code></em> :</span></p></td> |
| <td>a <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> that will be given in the <em class="parameter"><code>checkfull</code></em> callback.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>a new <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-push"></a><h3>gst_data_queue_push ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_data_queue_push (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> *item</code></em>);</pre> |
| <p> |
| Pushes a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> (or a structure that begins with the same fields) |
| on the <em class="parameter"><code>queue</code></em>. If the <em class="parameter"><code>queue</code></em> is full, the call will block until space is |
| available, OR the <em class="parameter"><code>queue</code></em> is set to flushing state. |
| MT safe. |
| </p> |
| <p> |
| Note that this function has slightly different semantics than <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#gst-pad-push"><code class="function">gst_pad_push()</code></a> |
| and <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#gst-pad-push-event"><code class="function">gst_pad_push_event()</code></a>: this function only takes ownership of <em class="parameter"><code>item</code></em> and |
| the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMiniObject.html#GstMiniObject"><span class="type">GstMiniObject</span></a> contained in <em class="parameter"><code>item</code></em> if the push was successful. If FALSE |
| is returned, the caller is responsible for freeing <em class="parameter"><code>item</code></em> and its contents. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if the <em class="parameter"><code>item</code></em> was successfully pushed on the <em class="parameter"><code>queue</code></em>.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-push-force"></a><h3>gst_data_queue_push_force ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_data_queue_push_force (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> *item</code></em>);</pre> |
| <p> |
| Pushes a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> (or a structure that begins with the same fields) |
| on the <em class="parameter"><code>queue</code></em>. It ignores if the <em class="parameter"><code>queue</code></em> is full or not and forces the <em class="parameter"><code>item</code></em> |
| to be pushed anyway. |
| MT safe. |
| </p> |
| <p> |
| Note that this function has slightly different semantics than <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#gst-pad-push"><code class="function">gst_pad_push()</code></a> |
| and <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#gst-pad-push-event"><code class="function">gst_pad_push_event()</code></a>: this function only takes ownership of <em class="parameter"><code>item</code></em> and |
| the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMiniObject.html#GstMiniObject"><span class="type">GstMiniObject</span></a> contained in <em class="parameter"><code>item</code></em> if the push was successful. If FALSE |
| is returned, the caller is responsible for freeing <em class="parameter"><code>item</code></em> and its contents. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if the <em class="parameter"><code>item</code></em> was successfully pushed on the <em class="parameter"><code>queue</code></em>.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-pop"></a><h3>gst_data_queue_pop ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_data_queue_pop (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a> **item</code></em>);</pre> |
| <p> |
| Retrieves the first <em class="parameter"><code>item</code></em> available on the <em class="parameter"><code>queue</code></em>. If the queue is currently |
| empty, the call will block until at least one item is available, OR the |
| <em class="parameter"><code>queue</code></em> is set to the flushing state. |
| MT safe. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td> |
| <td>pointer to store the returned <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueItem" title="struct GstDataQueueItem"><span class="type">GstDataQueueItem</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if an <em class="parameter"><code>item</code></em> was successfully retrieved from the <em class="parameter"><code>queue</code></em>.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-flush"></a><h3>gst_data_queue_flush ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_data_queue_flush (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>);</pre> |
| <p> |
| Flushes all the contents of the <em class="parameter"><code>queue</code></em>. Any call to <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-push" title="gst_data_queue_push ()"><span class="type">gst_data_queue_push</span></a> and |
| <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-pop" title="gst_data_queue_pop ()"><span class="type">gst_data_queue_pop</span></a> will be released. |
| MT safe. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr></tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-set-flushing"></a><h3>gst_data_queue_set_flushing ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_data_queue_set_flushing (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> flushing</code></em>);</pre> |
| <p> |
| Sets the queue to flushing state if <em class="parameter"><code>flushing</code></em> is <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a>. If set to flushing |
| state, any incoming data on the <em class="parameter"><code>queue</code></em> will be discarded. Any call currently |
| blocking on <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-push" title="gst_data_queue_push ()"><span class="type">gst_data_queue_push</span></a> or <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-pop" title="gst_data_queue_pop ()"><span class="type">gst_data_queue_pop</span></a> will return straight |
| away with a return value of <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a>. While the <em class="parameter"><code>queue</code></em> is in flushing state, |
| all calls to those two functions will return <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a>. |
| </p> |
| <p> |
| MT Safe. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>flushing</code></em> :</span></p></td> |
| <td>a <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> stating if the queue will be flushing or not.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-drop-head"></a><h3>gst_data_queue_drop_head ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_data_queue_drop_head (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a href="http://library.gnome.org/devel/gobject/unstable/gobject-Type-Information.html#GType"><span class="type">GType</span></a> type</code></em>);</pre> |
| <p> |
| Pop and unref the head-most <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMiniObject.html#GstMiniObject"><span class="type">GstMiniObject</span></a> with the given <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Type-Information.html#GType"><span class="type">GType</span></a>. |
| </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>queue</code></em> :</span></p></td> |
| <td>The <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> to drop an item from.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>type</code></em> :</span></p></td> |
| <td>The <a href="http://library.gnome.org/devel/gobject/unstable/gobject-Type-Information.html#GType"><span class="type">GType</span></a> of the item to drop.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>TRUE if an element was removed.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-is-full"></a><h3>gst_data_queue_is_full ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_data_queue_is_full (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>);</pre> |
| <p> |
| Queries if <em class="parameter"><code>queue</code></em> is full. This check will be done using the |
| <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueCheckFullFunction" title="GstDataQueueCheckFullFunction ()"><span class="type">GstDataQueueCheckFullFunction</span></a> registered with <em class="parameter"><code>queue</code></em>. |
| MT safe. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if <em class="parameter"><code>queue</code></em> is full.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-is-empty"></a><h3>gst_data_queue_is_empty ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_data_queue_is_empty (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>);</pre> |
| <p> |
| Queries if there are any items in the <em class="parameter"><code>queue</code></em>. |
| MT safe. |
| </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>queue</code></em> :</span></p></td> |
| <td>a <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a>.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if <em class="parameter"><code>queue</code></em> is empty.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-get-level"></a><h3>gst_data_queue_get_level ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_data_queue_get_level (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueueSize" title="struct GstDataQueueSize"><span class="type">GstDataQueueSize</span></a> *level</code></em>);</pre> |
| <p> |
| Get the current level of the queue. |
| </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>queue</code></em> :</span></p></td> |
| <td>The <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>level</code></em> :</span></p></td> |
| <td>the location to store the result</td> |
| </tr> |
| </tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-data-queue-limits-changed"></a><h3>gst_data_queue_limits_changed ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_data_queue_limits_changed (<em class="parameter"><code><a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> *queue</code></em>);</pre> |
| <p> |
| Inform the queue that the limits for the fullness check have changed and that |
| any blocking <a class="link" href="gstreamer-libs-GstDataQueue.html#gst-data-queue-push" title="gst_data_queue_push ()"><code class="function">gst_data_queue_push()</code></a> should be unblocked to recheck the limts. |
| </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>queue</code></em> :</span></p></td> |
| <td>The <a class="link" href="gstreamer-libs-GstDataQueue.html#GstDataQueue" title="struct GstDataQueue"><span class="type">GstDataQueue</span></a> |
| </td> |
| </tr></tbody> |
| </table></div> |
| <p class="since">Since 1.2.0</p> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr> |
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