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| <a href="#GstBaseSink.synopsis" class="shortcut">Top</a> |
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| <a href="#GstBaseSink.description" class="shortcut">Description</a> |
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| <a href="#GstBaseSink.object-hierarchy" class="shortcut">Object Hierarchy</a> |
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| <a href="#GstBaseSink.properties" class="shortcut">Properties</a> |
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| <a name="GstBaseSink"></a><div class="titlepage"></div> |
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| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="GstBaseSink.top_of_page"></a>GstBaseSink</span></h2> |
| <p>GstBaseSink</p> |
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| <div class="refsynopsisdiv"> |
| <a name="GstBaseSink.synopsis"></a><h2>Synopsis</h2> |
| <pre class="synopsis"> |
| #include <gst/base/gstbasesink.h> |
| |
| struct <a class="link" href="GstBaseSink.html#GstBaseSink-struct" title="struct GstBaseSink">GstBaseSink</a>; |
| struct <a class="link" href="GstBaseSink.html#GstBaseSinkClass" title="struct GstBaseSinkClass">GstBaseSinkClass</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="GstBaseSink.html#gst-base-sink-query-latency" title="gst_base_sink_query_latency ()">gst_base_sink_query_latency</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> *live</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> *upstream_live</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> *min_latency</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> *max_latency</code></em>); |
| <a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a> <a class="link" href="GstBaseSink.html#gst-base-sink-get-latency" title="gst_base_sink_get_latency ()">gst_base_sink_get_latency</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <a href="../gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> <a class="link" href="GstBaseSink.html#gst-base-sink-do-preroll" title="gst_base_sink_do_preroll ()">gst_base_sink_do_preroll</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/gstreamer-GstMiniObject.html#GstMiniObject"><span class="type">GstMiniObject</span></a> *obj</code></em>); |
| <a href="../gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> <a class="link" href="GstBaseSink.html#gst-base-sink-wait-preroll" title="gst_base_sink_wait_preroll ()">gst_base_sink_wait_preroll</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <a href="../gstreamer-1.0/GstClock.html#GstClockReturn"><span class="returnvalue">GstClockReturn</span></a> <a class="link" href="GstBaseSink.html#gst-base-sink-wait-clock" title="gst_base_sink_wait_clock ()">gst_base_sink_wait_clock</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTimeDiff"><span class="type">GstClockTimeDiff</span></a> *jitter</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-sync" title="gst_base_sink_set_sync ()">gst_base_sink_set_sync</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> sync</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="GstBaseSink.html#gst-base-sink-get-sync" title="gst_base_sink_get_sync ()">gst_base_sink_get_sync</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-max-lateness" title="gst_base_sink_set_max_lateness ()">gst_base_sink_set_max_lateness</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><span class="type">gint64</span> max_lateness</code></em>); |
| <span class="returnvalue">gint64</span> <a class="link" href="GstBaseSink.html#gst-base-sink-get-max-lateness" title="gst_base_sink_get_max_lateness ()">gst_base_sink_get_max_lateness</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-qos-enabled" title="gst_base_sink_set_qos_enabled ()">gst_base_sink_set_qos_enabled</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> enabled</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="GstBaseSink.html#gst-base-sink-is-qos-enabled" title="gst_base_sink_is_qos_enabled ()">gst_base_sink_is_qos_enabled</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-async-enabled" title="gst_base_sink_set_async_enabled ()">gst_base_sink_set_async_enabled</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> enabled</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="GstBaseSink.html#gst-base-sink-is-async-enabled" title="gst_base_sink_is_async_enabled ()">gst_base_sink_is_async_enabled</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-ts-offset" title="gst_base_sink_set_ts_offset ()">gst_base_sink_set_ts_offset</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTimeDiff"><span class="type">GstClockTimeDiff</span></a> offset</code></em>); |
| <a href="../gstreamer-1.0/GstClock.html#GstClockTimeDiff"><span class="returnvalue">GstClockTimeDiff</span></a> <a class="link" href="GstBaseSink.html#gst-base-sink-get-ts-offset" title="gst_base_sink_get_ts_offset ()">gst_base_sink_get_ts_offset</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-render-delay" title="gst_base_sink_set_render_delay ()">gst_base_sink_set_render_delay</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> delay</code></em>); |
| <a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a> <a class="link" href="GstBaseSink.html#gst-base-sink-get-render-delay" title="gst_base_sink_get_render_delay ()">gst_base_sink_get_render_delay</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <a href="../gstreamer-1.0/gstreamer-GstSample.html#GstSample"><span class="returnvalue">GstSample</span></a> * <a class="link" href="GstBaseSink.html#gst-base-sink-get-last-sample" title="gst_base_sink_get_last_sample ()">gst_base_sink_get_last_sample</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-blocksize" title="gst_base_sink_set_blocksize ()">gst_base_sink_set_blocksize</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> blocksize</code></em>); |
| <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="GstBaseSink.html#gst-base-sink-get-blocksize" title="gst_base_sink_get_blocksize ()">gst_base_sink_get_blocksize</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">guint64</span> <a class="link" href="GstBaseSink.html#gst-base-sink-get-throttle-time" title="gst_base_sink_get_throttle_time ()">gst_base_sink_get_throttle_time</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>); |
| <span class="returnvalue">void</span> <a class="link" href="GstBaseSink.html#gst-base-sink-set-throttle-time" title="gst_base_sink_set_throttle_time ()">gst_base_sink_set_throttle_time</a> (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> throttle</code></em>); |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PAD:CAPS" title="GST_BASE_SINK_PAD()">GST_BASE_SINK_PAD</a> (obj) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-GET-PREROLL-COND:CAPS" title="GST_BASE_SINK_GET_PREROLL_COND()">GST_BASE_SINK_GET_PREROLL_COND</a> (pad) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-GET-PREROLL-LOCK:CAPS" title="GST_BASE_SINK_GET_PREROLL_LOCK()">GST_BASE_SINK_GET_PREROLL_LOCK</a> (pad) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-BROADCAST:CAPS" title="GST_BASE_SINK_PREROLL_BROADCAST()">GST_BASE_SINK_PREROLL_BROADCAST</a> (pad) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-LOCK:CAPS" title="GST_BASE_SINK_PREROLL_LOCK()">GST_BASE_SINK_PREROLL_LOCK</a> (pad) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-SIGNAL:CAPS" title="GST_BASE_SINK_PREROLL_SIGNAL()">GST_BASE_SINK_PREROLL_SIGNAL</a> (pad) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-TRYLOCK:CAPS" title="GST_BASE_SINK_PREROLL_TRYLOCK()">GST_BASE_SINK_PREROLL_TRYLOCK</a> (pad) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-UNLOCK:CAPS" title="GST_BASE_SINK_PREROLL_UNLOCK()">GST_BASE_SINK_PREROLL_UNLOCK</a> (pad) |
| #define <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-WAIT:CAPS" title="GST_BASE_SINK_PREROLL_WAIT()">GST_BASE_SINK_PREROLL_WAIT</a> (pad) |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="synopsis"> |
| <a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a> |
| +----<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> |
| +----<a href="../gstreamer-1.0/GstObject.html">GstObject</a> |
| +----<a href="../gstreamer-1.0/GstElement.html">GstElement</a> |
| +----GstBaseSink |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.properties"></a><h2>Properties</h2> |
| <pre class="synopsis"> |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--async" title='The "async" property'>async</a>" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--blocksize" title='The "blocksize" property'>blocksize</a>" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--enable-last-sample" title='The "enable-last-sample" property'>enable-last-sample</a>" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--last-sample" title='The "last-sample" property'>last-sample</a>" <a href="../gstreamer-1.0/gstreamer-GstSample.html#GstSample"><span class="type">GstSample</span></a>* : Read |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--max-lateness" title='The "max-lateness" property'>max-lateness</a>" <span class="type">gint64</span> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--qos" title='The "qos" property'>qos</a>" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--render-delay" title='The "render-delay" property'>render-delay</a>" <span class="type">guint64</span> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--sync" title='The "sync" property'>sync</a>" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--throttle-time" title='The "throttle-time" property'>throttle-time</a>" <span class="type">guint64</span> : Read / Write |
| "<a class="link" href="GstBaseSink.html#GstBaseSink--ts-offset" title='The "ts-offset" property'>ts-offset</a>" <span class="type">gint64</span> : Read / Write |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.description"></a><h2>Description</h2> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.details"></a><h2>Details</h2> |
| <div class="refsect2"> |
| <a name="GstBaseSink-struct"></a><h3>struct GstBaseSink</h3> |
| <pre class="programlisting">struct GstBaseSink;</pre> |
| <p> |
| The opaque <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> data structure. |
| </p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSinkClass"></a><h3>struct GstBaseSinkClass</h3> |
| <pre class="programlisting">struct GstBaseSinkClass { |
| GstElementClass parent_class; |
| |
| /* get caps from subclass */ |
| GstCaps* (*get_caps) (GstBaseSink *sink, GstCaps *filter); |
| /* notify subclass of new caps */ |
| gboolean (*set_caps) (GstBaseSink *sink, GstCaps *caps); |
| |
| /* fixate sink caps during pull-mode negotiation */ |
| GstCaps * (*fixate) (GstBaseSink *sink, GstCaps *caps); |
| /* start or stop a pulling thread */ |
| gboolean (*activate_pull)(GstBaseSink *sink, gboolean active); |
| |
| /* get the start and end times for syncing on this buffer */ |
| void (*get_times) (GstBaseSink *sink, GstBuffer *buffer, |
| GstClockTime *start, GstClockTime *end); |
| |
| /* propose allocation parameters for upstream */ |
| gboolean (*propose_allocation) (GstBaseSink *sink, GstQuery *query); |
| |
| /* start and stop processing, ideal for opening/closing the resource */ |
| gboolean (*start) (GstBaseSink *sink); |
| gboolean (*stop) (GstBaseSink *sink); |
| |
| /* unlock any pending access to the resource. subclasses should unlock |
| * any function ASAP. */ |
| gboolean (*unlock) (GstBaseSink *sink); |
| /* Clear a previously indicated unlock request not that unlocking is |
| * complete. Sub-classes should clear any command queue or indicator they |
| * set during unlock */ |
| gboolean (*unlock_stop) (GstBaseSink *sink); |
| |
| /* notify subclass of query */ |
| gboolean (*query) (GstBaseSink *sink, GstQuery *query); |
| |
| /* notify subclass of event */ |
| gboolean (*event) (GstBaseSink *sink, GstEvent *event); |
| /* wait for eos or gap, subclasses should chain up to parent first */ |
| GstFlowReturn (*wait_event) (GstBaseSink *sink, GstEvent *event); |
| |
| /* notify subclass of buffer or list before doing sync */ |
| GstFlowReturn (*prepare) (GstBaseSink *sink, GstBuffer *buffer); |
| GstFlowReturn (*prepare_list) (GstBaseSink *sink, GstBufferList *buffer_list); |
| |
| /* notify subclass of preroll buffer or real buffer */ |
| GstFlowReturn (*preroll) (GstBaseSink *sink, GstBuffer *buffer); |
| GstFlowReturn (*render) (GstBaseSink *sink, GstBuffer *buffer); |
| /* Render a BufferList */ |
| GstFlowReturn (*render_list) (GstBaseSink *sink, GstBufferList *buffer_list); |
| }; |
| </pre> |
| <p> |
| Subclasses can override any of the available virtual methods or not, as |
| needed. At the minimum, the <em class="parameter"><code>render</code></em> method should be overridden to |
| output/present buffers. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><a href="../gstreamer-1.0/GstElement.html#GstElementClass"><span class="type">GstElementClass</span></a> <em class="structfield"><code><a name="GstBaseSinkClass.parent-class"></a>parent_class</code></em>;</span></p></td> |
| <td>Element parent class</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.get-caps"></a>get_caps</code></em> ()</span></p></td> |
| <td>Called to get sink pad caps from the subclass</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.set-caps"></a>set_caps</code></em> ()</span></p></td> |
| <td>Notify subclass of changed caps</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.fixate"></a>fixate</code></em> ()</span></p></td> |
| <td>Only useful in pull mode. Implement if you have |
| ideas about what should be the default values for the caps you support.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.activate-pull"></a>activate_pull</code></em> ()</span></p></td> |
| <td>Subclasses should override this when they can provide an |
| alternate method of spawning a thread to drive the pipeline in pull mode. |
| Should start or stop the pulling thread, depending on the value of the |
| "active" argument. Called after actually activating the sink pad in pull |
| mode. The default implementation starts a task on the sink pad.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.get-times"></a>get_times</code></em> ()</span></p></td> |
| <td>Called to get the start and end times for synchronising |
| the passed buffer to the clock</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.propose-allocation"></a>propose_allocation</code></em> ()</span></p></td> |
| <td>configure the allocation query</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.start"></a>start</code></em> ()</span></p></td> |
| <td>Start processing. Ideal for opening resources in the subclass</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.stop"></a>stop</code></em> ()</span></p></td> |
| <td>Stop processing. Subclasses should use this to close resources.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.unlock"></a>unlock</code></em> ()</span></p></td> |
| <td>Unlock any pending access to the resource. Subclasses should |
| unblock any blocked function ASAP</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.unlock-stop"></a>unlock_stop</code></em> ()</span></p></td> |
| <td>Clear the previous unlock request. Subclasses should clear |
| any state they set during <code class="function">unlock()</code>, such as clearing command queues.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.query"></a>query</code></em> ()</span></p></td> |
| <td>perform a <a href="../gstreamer-1.0/gstreamer-GstQuery.html#GstQuery"><span class="type">GstQuery</span></a> on the element.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.event"></a>event</code></em> ()</span></p></td> |
| <td>Override this to handle events arriving on the sink pad</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.wait-event"></a>wait_event</code></em> ()</span></p></td> |
| <td>Override this to implement custom logic to wait for the event |
| time (for events like EOS and GAP). Subclasses should always first |
| chain up to the default implementation.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.prepare"></a>prepare</code></em> ()</span></p></td> |
| <td>Called to prepare the buffer for <em class="parameter"><code>render</code></em> and <em class="parameter"><code>preroll</code></em>. This |
| function is called before synchronisation is performed.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.prepare-list"></a>prepare_list</code></em> ()</span></p></td> |
| <td>Called to prepare the buffer list for <em class="parameter"><code>render_list</code></em>. This |
| function is called before synchronisation is performed.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.preroll"></a>preroll</code></em> ()</span></p></td> |
| <td>Called to present the preroll buffer if desired.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.render"></a>render</code></em> ()</span></p></td> |
| <td>Called when a buffer should be presented or output, at the |
| correct moment if the <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> has been set to sync to the clock.</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="structfield"><code><a name="GstBaseSinkClass.render-list"></a>render_list</code></em> ()</span></p></td> |
| <td>Same as <em class="parameter"><code>render</code></em> but used whith buffer lists instead of |
| buffers.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-query-latency"></a><h3>gst_base_sink_query_latency ()</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_base_sink_query_latency (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> *live</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> *upstream_live</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> *min_latency</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> *max_latency</code></em>);</pre> |
| <p> |
| Query the sink for the latency parameters. The latency will be queried from |
| the upstream elements. <em class="parameter"><code>live</code></em> will be TRUE if <em class="parameter"><code>sink</code></em> is configured to |
| synchronize against the clock. <em class="parameter"><code>upstream_live</code></em> will be TRUE if an upstream |
| element is live. |
| </p> |
| <p> |
| If both <em class="parameter"><code>live</code></em> and <em class="parameter"><code>upstream_live</code></em> are TRUE, the sink will want to compensate |
| for the latency introduced by the upstream elements by setting the |
| <em class="parameter"><code>min_latency</code></em> to a strictly possitive value. |
| </p> |
| <p> |
| This function is mostly used by subclasses. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>live</code></em> :</span></p></td> |
| <td>if the sink is live. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>upstream_live</code></em> :</span></p></td> |
| <td>if an upstream element is live. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>min_latency</code></em> :</span></p></td> |
| <td>the min latency of the upstream elements. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>max_latency</code></em> :</span></p></td> |
| <td>the max latency of the upstream elements. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>TRUE if the query succeeded.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-latency"></a><h3>gst_base_sink_get_latency ()</h3> |
| <pre class="programlisting"><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a> gst_base_sink_get_latency (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Get the currently configured latency. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>The configured latency.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-do-preroll"></a><h3>gst_base_sink_do_preroll ()</h3> |
| <pre class="programlisting"><a href="../gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> gst_base_sink_do_preroll (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/gstreamer-GstMiniObject.html#GstMiniObject"><span class="type">GstMiniObject</span></a> *obj</code></em>);</pre> |
| <p> |
| If the <em class="parameter"><code>sink</code></em> spawns its own thread for pulling buffers from upstream it |
| should call this method after it has pulled a buffer. If the element needed |
| to preroll, this function will perform the preroll and will then block |
| until the element state is changed. |
| </p> |
| <p> |
| This function should be called with the PREROLL_LOCK held. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td> |
| <td>the mini object that caused the preroll. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="../gstreamer-1.0/GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> if the preroll completed and processing can |
| continue. Any other return value should be returned from the render vmethod.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-wait-preroll"></a><h3>gst_base_sink_wait_preroll ()</h3> |
| <pre class="programlisting"><a href="../gstreamer-1.0/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> gst_base_sink_wait_preroll (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| If the <a class="link" href="GstBaseSink.html#GstBaseSinkClass.render"><code class="function">GstBaseSinkClass.render()</code></a> method performs its own synchronisation |
| against the clock it must unblock when going from PLAYING to the PAUSED state |
| and call this method before continuing to render the remaining data. |
| </p> |
| <p> |
| This function will block until a state change to PLAYING happens (in which |
| case this function returns <a href="../gstreamer-1.0/GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a>) or the processing must be stopped due |
| to a state change to READY or a FLUSH event (in which case this function |
| returns <a href="../gstreamer-1.0/GstPad.html#GST-FLOW-FLUSHING:CAPS"><span class="type">GST_FLOW_FLUSHING</span></a>). |
| </p> |
| <p> |
| This function should only be called with the PREROLL_LOCK held, like in the |
| render function. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td> |
| <a href="../gstreamer-1.0/GstPad.html#GST-FLOW-OK:CAPS"><span class="type">GST_FLOW_OK</span></a> if the preroll completed and processing can |
| continue. Any other return value should be returned from the render vmethod.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-wait-clock"></a><h3>gst_base_sink_wait_clock ()</h3> |
| <pre class="programlisting"><a href="../gstreamer-1.0/GstClock.html#GstClockReturn"><span class="returnvalue">GstClockReturn</span></a> gst_base_sink_wait_clock (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTimeDiff"><span class="type">GstClockTimeDiff</span></a> *jitter</code></em>);</pre> |
| <p> |
| This function will block until <em class="parameter"><code>time</code></em> is reached. It is usually called by |
| subclasses that use their own internal synchronisation. |
| </p> |
| <p> |
| If <em class="parameter"><code>time</code></em> is not valid, no sycnhronisation is done and <a href="../gstreamer-1.0/GstClock.html#GST-CLOCK-BADTIME:CAPS"><span class="type">GST_CLOCK_BADTIME</span></a> is |
| returned. Likewise, if synchronisation is disabled in the element or there |
| is no clock, no synchronisation is done and <a href="../gstreamer-1.0/GstClock.html#GST-CLOCK-BADTIME:CAPS"><span class="type">GST_CLOCK_BADTIME</span></a> is returned. |
| </p> |
| <p> |
| This function should only be called with the PREROLL_LOCK held, like when |
| receiving an EOS event in the <a class="link" href="GstBaseSink.html#GstBaseSinkClass.event"><code class="function">GstBaseSinkClass.event()</code></a> vmethod or when |
| receiving a buffer in |
| the <a class="link" href="GstBaseSink.html#GstBaseSinkClass.render"><code class="function">GstBaseSinkClass.render()</code></a> vmethod. |
| </p> |
| <p> |
| The <em class="parameter"><code>time</code></em> argument should be the running_time of when this method should |
| return and is not adjusted with any latency or offset configured in the |
| sink. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>time</code></em> :</span></p></td> |
| <td>the running_time to be reached</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>jitter</code></em> :</span></p></td> |
| <td>the jitter to be filled with time diff, or NULL. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td><a href="../gstreamer-1.0/GstClock.html#GstClockReturn"><span class="type">GstClockReturn</span></a></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-sync"></a><h3>gst_base_sink_set_sync ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_sync (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> sync</code></em>);</pre> |
| <p> |
| Configures <em class="parameter"><code>sink</code></em> to synchronize on the clock or not. When |
| <em class="parameter"><code>sync</code></em> is FALSE, incoming samples will be played as fast as |
| possible. If <em class="parameter"><code>sync</code></em> is TRUE, the timestamps of the incomming |
| buffers will be used to schedule the exact render time of its |
| contents. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sync</code></em> :</span></p></td> |
| <td>the new sync value.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-sync"></a><h3>gst_base_sink_get_sync ()</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_base_sink_get_sync (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Checks if <em class="parameter"><code>sink</code></em> is currently configured to synchronize against the |
| clock. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>TRUE if the sink is configured to synchronize against the clock.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-max-lateness"></a><h3>gst_base_sink_set_max_lateness ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_max_lateness (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><span class="type">gint64</span> max_lateness</code></em>);</pre> |
| <p> |
| Sets the new max lateness value to <em class="parameter"><code>max_lateness</code></em>. This value is |
| used to decide if a buffer should be dropped or not based on the |
| buffer timestamp and the current clock time. A value of -1 means |
| an unlimited time. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>max_lateness</code></em> :</span></p></td> |
| <td>the new max lateness value.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-max-lateness"></a><h3>gst_base_sink_get_max_lateness ()</h3> |
| <pre class="programlisting"><span class="returnvalue">gint64</span> gst_base_sink_get_max_lateness (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Gets the max lateness value. See gst_base_sink_set_max_lateness for |
| more details. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>The maximum time in nanoseconds that a buffer can be late |
| before it is dropped and not rendered. A value of -1 means an |
| unlimited time.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-qos-enabled"></a><h3>gst_base_sink_set_qos_enabled ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_qos_enabled (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> enabled</code></em>);</pre> |
| <p> |
| Configures <em class="parameter"><code>sink</code></em> to send Quality-of-Service events upstream. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>enabled</code></em> :</span></p></td> |
| <td>the new qos value.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-is-qos-enabled"></a><h3>gst_base_sink_is_qos_enabled ()</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_base_sink_is_qos_enabled (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Checks if <em class="parameter"><code>sink</code></em> is currently configured to send Quality-of-Service events |
| upstream. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>TRUE if the sink is configured to perform Quality-of-Service.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-async-enabled"></a><h3>gst_base_sink_set_async_enabled ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_async_enabled (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> enabled</code></em>);</pre> |
| <p> |
| Configures <em class="parameter"><code>sink</code></em> to perform all state changes asynchronusly. When async is |
| disabled, the sink will immediately go to PAUSED instead of waiting for a |
| preroll buffer. This feature is useful if the sink does not synchronize |
| against the clock or when it is dealing with sparse streams. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>enabled</code></em> :</span></p></td> |
| <td>the new async value.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-is-async-enabled"></a><h3>gst_base_sink_is_async_enabled ()</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_base_sink_is_async_enabled (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Checks if <em class="parameter"><code>sink</code></em> is currently configured to perform asynchronous state |
| changes to PAUSED. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>TRUE if the sink is configured to perform asynchronous state |
| changes.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-ts-offset"></a><h3>gst_base_sink_set_ts_offset ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_ts_offset (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTimeDiff"><span class="type">GstClockTimeDiff</span></a> offset</code></em>);</pre> |
| <p> |
| Adjust the synchronisation of <em class="parameter"><code>sink</code></em> with <em class="parameter"><code>offset</code></em>. A negative value will |
| render buffers earlier than their timestamp. A positive value will delay |
| rendering. This function can be used to fix playback of badly timestamped |
| buffers. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>offset</code></em> :</span></p></td> |
| <td>the new offset</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-ts-offset"></a><h3>gst_base_sink_get_ts_offset ()</h3> |
| <pre class="programlisting"><a href="../gstreamer-1.0/GstClock.html#GstClockTimeDiff"><span class="returnvalue">GstClockTimeDiff</span></a> gst_base_sink_get_ts_offset (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Get the synchronisation offset of <em class="parameter"><code>sink</code></em>. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>The synchronisation offset.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-render-delay"></a><h3>gst_base_sink_set_render_delay ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_render_delay (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> delay</code></em>);</pre> |
| <p> |
| Set the render delay in <em class="parameter"><code>sink</code></em> to <em class="parameter"><code>delay</code></em>. The render delay is the time |
| between actual rendering of a buffer and its synchronisation time. Some |
| devices might delay media rendering which can be compensated for with this |
| function. |
| </p> |
| <p> |
| After calling this function, this sink will report additional latency and |
| other sinks will adjust their latency to delay the rendering of their media. |
| </p> |
| <p> |
| This function is usually called by subclasses. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>delay</code></em> :</span></p></td> |
| <td>the new delay</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-render-delay"></a><h3>gst_base_sink_get_render_delay ()</h3> |
| <pre class="programlisting"><a href="../gstreamer-1.0/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a> gst_base_sink_get_render_delay (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Get the render delay of <em class="parameter"><code>sink</code></em>. see <a class="link" href="GstBaseSink.html#gst-base-sink-set-render-delay" title="gst_base_sink_set_render_delay ()"><code class="function">gst_base_sink_set_render_delay()</code></a> for more |
| information about the render delay. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>the render delay of <em class="parameter"><code>sink</code></em>.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-last-sample"></a><h3>gst_base_sink_get_last_sample ()</h3> |
| <pre class="programlisting"><a href="../gstreamer-1.0/gstreamer-GstSample.html#GstSample"><span class="returnvalue">GstSample</span></a> * gst_base_sink_get_last_sample (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Get the last sample that arrived in the sink and was used for preroll or for |
| rendering. This property can be used to generate thumbnails. |
| </p> |
| <p> |
| The <a href="../gstreamer-1.0/gstreamer-GstCaps.html#GstCaps"><span class="type">GstCaps</span></a> on the sample can be used to determine the type of the buffer. |
| </p> |
| <p> |
| Free-function: gst_sample_unref |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>the sink</td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>a <a href="../gstreamer-1.0/gstreamer-GstSample.html#GstSample"><span class="type">GstSample</span></a>. <a href="../gstreamer-1.0/gstreamer-GstSample.html#gst-sample-unref"><code class="function">gst_sample_unref()</code></a> after usage. |
| This function returns NULL when no buffer has arrived in the sink yet |
| or when the sink is not in PAUSED or PLAYING. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-blocksize"></a><h3>gst_base_sink_set_blocksize ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_blocksize (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</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> blocksize</code></em>);</pre> |
| <p> |
| Set the number of bytes that the sink will pull when it is operating in pull |
| mode. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>blocksize</code></em> :</span></p></td> |
| <td>the blocksize in bytes</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-blocksize"></a><h3>gst_base_sink_get_blocksize ()</h3> |
| <pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_base_sink_get_blocksize (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Get the number of bytes that the sink will pull when it is operating in pull |
| mode. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>the number of bytes <em class="parameter"><code>sink</code></em> will pull in pull mode.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-throttle-time"></a><h3>gst_base_sink_get_throttle_time ()</h3> |
| <pre class="programlisting"><span class="returnvalue">guint64</span> gst_base_sink_get_throttle_time (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>);</pre> |
| <p> |
| Get the time that will be inserted between frames to control the |
| maximum buffers per second. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> |
| <td>the number of nanoseconds <em class="parameter"><code>sink</code></em> will put between frames.</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-throttle-time"></a><h3>gst_base_sink_set_throttle_time ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> gst_base_sink_set_throttle_time (<em class="parameter"><code><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> *sink</code></em>, |
| <em class="parameter"><code><span class="type">guint64</span> throttle</code></em>);</pre> |
| <p> |
| Set the time that will be inserted between rendered buffers. This |
| can be used to control the maximum buffers per second that the sink |
| will render. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>sink</code></em> :</span></p></td> |
| <td>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> |
| </td> |
| </tr> |
| <tr> |
| <td><p><span class="term"><em class="parameter"><code>throttle</code></em> :</span></p></td> |
| <td>the throttle time in nanoseconds</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PAD:CAPS"></a><h3>GST_BASE_SINK_PAD()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PAD(obj) (GST_BASE_SINK_CAST (obj)->sinkpad) |
| </pre> |
| <p> |
| Gives the pointer to the <a href="../gstreamer-1.0/GstPad.html"><span class="type">GstPad</span></a> object of the element. |
| </p> |
| <div class="variablelist"><table border="0"> |
| <col align="left" valign="top"> |
| <tbody><tr> |
| <td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td> |
| <td>base sink instance</td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-GET-PREROLL-COND:CAPS"></a><h3>GST_BASE_SINK_GET_PREROLL_COND()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_GET_PREROLL_COND(pad) (&GST_BASE_SINK_CAST(pad)->preroll_cond) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-GET-PREROLL-LOCK:CAPS"></a><h3>GST_BASE_SINK_GET_PREROLL_LOCK()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_GET_PREROLL_LOCK(pad) (&GST_BASE_SINK_CAST(pad)->preroll_lock) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PREROLL-BROADCAST:CAPS"></a><h3>GST_BASE_SINK_PREROLL_BROADCAST()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PREROLL_BROADCAST(pad) g_cond_broadcast (GST_BASE_SINK_GET_PREROLL_COND (pad)); |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PREROLL-LOCK:CAPS"></a><h3>GST_BASE_SINK_PREROLL_LOCK()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PREROLL_LOCK(pad) (g_mutex_lock(GST_BASE_SINK_GET_PREROLL_LOCK(pad))) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PREROLL-SIGNAL:CAPS"></a><h3>GST_BASE_SINK_PREROLL_SIGNAL()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PREROLL_SIGNAL(pad) g_cond_signal (GST_BASE_SINK_GET_PREROLL_COND (pad)); |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PREROLL-TRYLOCK:CAPS"></a><h3>GST_BASE_SINK_PREROLL_TRYLOCK()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PREROLL_TRYLOCK(pad) (g_mutex_trylock(GST_BASE_SINK_GET_PREROLL_LOCK(pad))) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PREROLL-UNLOCK:CAPS"></a><h3>GST_BASE_SINK_PREROLL_UNLOCK()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PREROLL_UNLOCK(pad) (g_mutex_unlock(GST_BASE_SINK_GET_PREROLL_LOCK(pad))) |
| </pre> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PREROLL-WAIT:CAPS"></a><h3>GST_BASE_SINK_PREROLL_WAIT()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PREROLL_WAIT(pad)</pre> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.property-details"></a><h2>Property Details</h2> |
| <div class="refsect2"> |
| <a name="GstBaseSink--async"></a><h3>The <code class="literal">"async"</code> property</h3> |
| <pre class="programlisting"> "async" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre> |
| <p> |
| If set to <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a>, the basesink will perform asynchronous state changes. |
| When set to <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a>, the sink will not signal the parent when it prerolls. |
| Use this option when dealing with sparse streams or when synchronisation is |
| not required. |
| </p> |
| <p>Default value: TRUE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--blocksize"></a><h3>The <code class="literal">"blocksize"</code> property</h3> |
| <pre class="programlisting"> "blocksize" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> : Read / Write</pre> |
| <p> |
| The amount of bytes to pull when operating in pull mode. |
| </p> |
| <p>Default value: 4096</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--enable-last-sample"></a><h3>The <code class="literal">"enable-last-sample"</code> property</h3> |
| <pre class="programlisting"> "enable-last-sample" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre> |
| <p> |
| Enable the last-sample property. If FALSE, basesink doesn't keep a |
| reference to the last buffer arrived and the last-sample property is always |
| set to NULL. This can be useful if you need buffers to be released as soon |
| as possible, eg. if you're using a buffer pool. |
| </p> |
| <p>Default value: TRUE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--last-sample"></a><h3>The <code class="literal">"last-sample"</code> property</h3> |
| <pre class="programlisting"> "last-sample" <a href="../gstreamer-1.0/gstreamer-GstSample.html#GstSample"><span class="type">GstSample</span></a>* : Read</pre> |
| <p> |
| The last buffer that arrived in the sink and was used for preroll or for |
| rendering. This property can be used to generate thumbnails. This property |
| can be NULL when the sink has not yet received a bufer. |
| </p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--max-lateness"></a><h3>The <code class="literal">"max-lateness"</code> property</h3> |
| <pre class="programlisting"> "max-lateness" <span class="type">gint64</span> : Read / Write</pre> |
| <p>Maximum number of nanoseconds that a buffer can be late before it is dropped (-1 unlimited).</p> |
| <p>Allowed values: >= -1</p> |
| <p>Default value: -1</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--qos"></a><h3>The <code class="literal">"qos"</code> property</h3> |
| <pre class="programlisting"> "qos" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre> |
| <p>Generate Quality-of-Service events upstream.</p> |
| <p>Default value: FALSE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--render-delay"></a><h3>The <code class="literal">"render-delay"</code> property</h3> |
| <pre class="programlisting"> "render-delay" <span class="type">guint64</span> : Read / Write</pre> |
| <p> |
| The additional delay between synchronisation and actual rendering of the |
| media. This property will add additional latency to the device in order to |
| make other sinks compensate for the delay. |
| </p> |
| <p>Default value: 0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--sync"></a><h3>The <code class="literal">"sync"</code> property</h3> |
| <pre class="programlisting"> "sync" <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> : Read / Write</pre> |
| <p>Sync on the clock.</p> |
| <p>Default value: TRUE</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--throttle-time"></a><h3>The <code class="literal">"throttle-time"</code> property</h3> |
| <pre class="programlisting"> "throttle-time" <span class="type">guint64</span> : Read / Write</pre> |
| <p> |
| The time to insert between buffers. This property can be used to control |
| the maximum amount of buffers per second to render. Setting this property |
| to a value bigger than 0 will make the sink create THROTTLE QoS events. |
| </p> |
| <p>Default value: 0</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--ts-offset"></a><h3>The <code class="literal">"ts-offset"</code> property</h3> |
| <pre class="programlisting"> "ts-offset" <span class="type">gint64</span> : Read / Write</pre> |
| <p> |
| Controls the final synchronisation, a negative value will render the buffer |
| earlier while a positive value delays playback. This property can be |
| used to fix synchronisation in bad files. |
| </p> |
| <p>Default value: 0</p> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
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