| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <title>GstBaseSink: GStreamer 1.0 Library Reference Manual</title> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.78.1"> |
| <link rel="home" href="index.html" title="GStreamer 1.0 Library Reference Manual"> |
| <link rel="up" href="gstreamer-base.html" title="GStreamer Base and Utillity Classes"> |
| <link rel="prev" href="GstBaseSrc.html" title="GstBaseSrc"> |
| <link rel="next" href="GstBaseTransform.html" title="GstBaseTransform"> |
| <meta name="generator" content="GTK-Doc V1.24 (XML mode)"> |
| <link rel="stylesheet" href="style.css" type="text/css"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> |
| <td width="100%" align="left" class="shortcuts"> |
| <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> |
| <a href="#GstBaseSink.description" class="shortcut">Description</a></span><span id="nav_hierarchy"> <span class="dim">|</span> |
| <a href="#GstBaseSink.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties"> <span class="dim">|</span> |
| <a href="#GstBaseSink.properties" class="shortcut">Properties</a></span> |
| </td> |
| <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> |
| <td><a accesskey="u" href="gstreamer-base.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> |
| <td><a accesskey="p" href="GstBaseSrc.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> |
| <td><a accesskey="n" href="GstBaseTransform.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> |
| </tr></table> |
| <div class="refentry"> |
| <a name="GstBaseSink"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="GstBaseSink.top_of_page"></a>GstBaseSink</span></h2> |
| <p>GstBaseSink — Base class for sink elements</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.functions"></a><h2>Functions</h2> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="functions_return"> |
| <col class="functions_name"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="function_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-query-latency" title="gst_base_sink_query_latency ()">gst_base_sink_query_latency</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-get-latency" title="gst_base_sink_get_latency ()">gst_base_sink_get_latency</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-do-preroll" title="gst_base_sink_do_preroll ()">gst_base_sink_do_preroll</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-wait" title="gst_base_sink_wait ()">gst_base_sink_wait</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-wait-preroll" title="gst_base_sink_wait_preroll ()">gst_base_sink_wait_preroll</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockReturn"><span class="returnvalue">GstClockReturn</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-wait-clock" title="gst_base_sink_wait_clock ()">gst_base_sink_wait_clock</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-set-sync" title="gst_base_sink_set_sync ()">gst_base_sink_set_sync</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-get-sync" title="gst_base_sink_get_sync ()">gst_base_sink_get_sync</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">gint64</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTimeDiff"><span class="returnvalue">GstClockTimeDiff</span></a> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="returnvalue">GstClockTime</span></a> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSample.html"><span class="returnvalue">GstSample</span></a> * |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-set-blocksize" title="gst_base_sink_set_blocksize ()">gst_base_sink_set_blocksize</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-get-blocksize" title="gst_base_sink_get_blocksize ()">gst_base_sink_get_blocksize</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">guint64</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <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> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-set-max-bitrate" title="gst_base_sink_set_max_bitrate ()">gst_base_sink_set_max_bitrate</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">guint64</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-get-max-bitrate" title="gst_base_sink_get_max_bitrate ()">gst_base_sink_get_max_bitrate</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-set-last-sample-enabled" title="gst_base_sink_set_last_sample_enabled ()">gst_base_sink_set_last_sample_enabled</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#gst-base-sink-is-last-sample-enabled" title="gst_base_sink_is_last_sample_enabled ()">gst_base_sink_is_last_sample_enabled</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PAD:CAPS" title="GST_BASE_SINK_PAD()">GST_BASE_SINK_PAD</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <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><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <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><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-BROADCAST:CAPS" title="GST_BASE_SINK_PREROLL_BROADCAST()">GST_BASE_SINK_PREROLL_BROADCAST</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-LOCK:CAPS" title="GST_BASE_SINK_PREROLL_LOCK()">GST_BASE_SINK_PREROLL_LOCK</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-SIGNAL:CAPS" title="GST_BASE_SINK_PREROLL_SIGNAL()">GST_BASE_SINK_PREROLL_SIGNAL</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-TRYLOCK:CAPS" title="GST_BASE_SINK_PREROLL_TRYLOCK()">GST_BASE_SINK_PREROLL_TRYLOCK</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-UNLOCK:CAPS" title="GST_BASE_SINK_PREROLL_UNLOCK()">GST_BASE_SINK_PREROLL_UNLOCK</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-WAIT:CAPS" title="GST_BASE_SINK_PREROLL_WAIT()">GST_BASE_SINK_PREROLL_WAIT</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="GstBaseSink.html#GST-BASE-SINK-PREROLL-WAIT-UNTIL:CAPS" title="GST_BASE_SINK_PREROLL_WAIT_UNTIL()">GST_BASE_SINK_PREROLL_WAIT_UNTIL</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.properties"></a><h2>Properties</h2> |
| <div class="informaltable"><table border="0"> |
| <colgroup> |
| <col width="150px" class="properties_type"> |
| <col width="300px" class="properties_name"> |
| <col width="200px" class="properties_flags"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--async" title="The “async” property">async</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--blocksize" title="The “blocksize” property">blocksize</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--enable-last-sample" title="The “enable-last-sample” property">enable-last-sample</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"> |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSample.html"><span class="type">GstSample</span></a> *</td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--last-sample" title="The “last-sample” property">last-sample</a></td> |
| <td class="property_flags">Read</td> |
| </tr> |
| <tr> |
| <td class="property_type"><span class="type">guint64</span></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--max-bitrate" title="The “max-bitrate” property">max-bitrate</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><span class="type">gint64</span></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--max-lateness" title="The “max-lateness” property">max-lateness</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--qos" title="The “qos” property">qos</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><span class="type">guint64</span></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--render-delay" title="The “render-delay” property">render-delay</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--sync" title="The “sync” property">sync</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><span class="type">guint64</span></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--throttle-time" title="The “throttle-time” property">throttle-time</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| <tr> |
| <td class="property_type"><span class="type">gint64</span></td> |
| <td class="property_name"><a class="link" href="GstBaseSink.html#GstBaseSink--ts-offset" title="The “ts-offset” property">ts-offset</a></td> |
| <td class="property_flags">Read / Write</td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.other"></a><h2>Types and Values</h2> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="name"> |
| <col class="description"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="datatype_keyword">struct</td> |
| <td class="function_name"><a class="link" href="GstBaseSink.html#GstBaseSink-struct" title="struct GstBaseSink">GstBaseSink</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword">struct</td> |
| <td class="function_name"><a class="link" href="GstBaseSink.html#GstBaseSinkClass" title="struct GstBaseSinkClass">GstBaseSinkClass</a></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.object-hierarchy"></a><h2>Object Hierarchy</h2> |
| <pre class="screen"> <a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a> |
| <span class="lineart">╰──</span> <a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a> |
| <span class="lineart">╰──</span> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html">GstObject</a> |
| <span class="lineart">╰──</span> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html">GstElement</a> |
| <span class="lineart">╰──</span> GstBaseSink |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.includes"></a><h2>Includes</h2> |
| <pre class="synopsis">#include <gst/base/gstbasesink.h> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.description"></a><h2>Description</h2> |
| <p><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> is the base class for sink elements in GStreamer, such as |
| xvimagesink or filesink. It is a layer on top of <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html"><span class="type">GstElement</span></a> that provides a |
| simplified interface to plugin writers. <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> handles many details |
| for you, for example: preroll, clock synchronization, state changes, |
| activation in push or pull mode, and queries.</p> |
| <p>In most cases, when writing sink elements, there is no need to implement |
| class methods from <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html"><span class="type">GstElement</span></a> or to set functions on pads, because the |
| <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> infrastructure should be sufficient.</p> |
| <p><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> provides support for exactly one sink pad, which should be |
| named "sink". A sink implementation (subclass of <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a>) should |
| install a pad template in its class_init function, like so:</p> |
| <div class="informalexample"> |
| <table class="listing_frame" border="0" cellpadding="0" cellspacing="0"> |
| <tbody> |
| <tr> |
| <td class="listing_lines" align="right"><pre>1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
| 11 |
| 12 |
| 13 |
| 14 |
| 15 |
| 16</pre></td> |
| <td class="listing_code"><pre class="programlisting"><span class="gtkdoc kwb">static void</span> |
| <span class="function">my_element_class_init</span> <span class="gtkdoc opt">(</span>GstMyElementClass <span class="gtkdoc opt">*</span>klass<span class="gtkdoc opt">)</span> |
| <span class="gtkdoc opt">{</span> |
| GstElementClass <span class="gtkdoc opt">*</span>gstelement_class <span class="gtkdoc opt">=</span> <span class="function">GST_ELEMENT_CLASS</span> <span class="gtkdoc opt">(</span>klass<span class="gtkdoc opt">);</span> |
| |
| <span class="gtkdoc slc">// sinktemplate should be a #GstStaticPadTemplate with direction</span> |
| <span class="gtkdoc slc">// %GST_PAD_SINK and name "sink"</span> |
| <span class="function"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html#gst-element-class-add-pad-template">gst_element_class_add_pad_template</a></span> <span class="gtkdoc opt">(</span>gstelement_class<span class="gtkdoc opt">,</span> |
| <span class="function"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPadTemplate.html#gst-static-pad-template-get">gst_static_pad_template_get</a></span> <span class="gtkdoc opt">(&</span>sinktemplate<span class="gtkdoc opt">));</span> |
| |
| <span class="function"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html#gst-element-class-set-static-metadata">gst_element_class_set_static_metadata</a></span> <span class="gtkdoc opt">(</span>gstelement_class<span class="gtkdoc opt">,</span> |
| <span class="string">"Sink name"</span><span class="gtkdoc opt">,</span> |
| <span class="string">"Sink"</span><span class="gtkdoc opt">,</span> |
| <span class="string">"My Sink element"</span><span class="gtkdoc opt">,</span> |
| <span class="string">"The author <my.sink@my.email>"</span><span class="gtkdoc opt">);</span> |
| <span class="gtkdoc opt">}</span></pre></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| |
| <p></p> |
| <p><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> will handle the prerolling correctly. This means that it will |
| return <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html#GST-STATE-CHANGE-ASYNC:CAPS"><code class="literal">GST_STATE_CHANGE_ASYNC</code></a> from a state change to PAUSED until the first |
| buffer arrives in this element. The base class will call the |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.preroll"><code class="function">GstBaseSinkClass.preroll()</code></a> vmethod with this preroll buffer and will then |
| commit the state change to the next asynchronously pending state.</p> |
| <p>When the element is set to PLAYING, <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> will synchronise on the |
| clock using the times returned from <a class="link" href="GstBaseSink.html#GstBaseSinkClass.get-times"><code class="function">GstBaseSinkClass.get_times()</code></a>. If this |
| function returns <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-TIME-NONE:CAPS"><code class="literal">GST_CLOCK_TIME_NONE</code></a> for the start time, no synchronisation |
| will be done. Synchronisation can be disabled entirely by setting the object |
| <a class="link" href="GstBaseSink.html#GstBaseSink--sync" title="The “sync” property"><span class="type">“sync”</span></a> property to <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>.</p> |
| <p>After synchronisation the virtual method <a class="link" href="GstBaseSink.html#GstBaseSinkClass.render"><code class="function">GstBaseSinkClass.render()</code></a> will be |
| called. Subclasses should minimally implement this method.</p> |
| <p>Subclasses that synchronise on the clock in the <a class="link" href="GstBaseSink.html#GstBaseSinkClass.render"><code class="function">GstBaseSinkClass.render()</code></a> |
| method are supported as well. These classes typically receive a buffer in |
| the render method and can then potentially block on the clock while |
| rendering. A typical example is an audiosink. |
| These subclasses can use <a class="link" href="GstBaseSink.html#gst-base-sink-wait-preroll" title="gst_base_sink_wait_preroll ()"><code class="function">gst_base_sink_wait_preroll()</code></a> to perform the |
| blocking wait.</p> |
| <p>Upon receiving the EOS event in the PLAYING state, <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> will wait |
| for the clock to reach the time indicated by the stop time of the last |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.get-times"><code class="function">GstBaseSinkClass.get_times()</code></a> call before posting an EOS message. When the |
| element receives EOS in PAUSED, preroll completes, the event is queued and an |
| EOS message is posted when going to PLAYING.</p> |
| <p><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> will internally use the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstEvent.html#GST-EVENT-SEGMENT:CAPS"><code class="literal">GST_EVENT_SEGMENT</code></a> events to schedule |
| synchronisation and clipping of buffers. Buffers that fall completely outside |
| of the current segment are dropped. Buffers that fall partially in the |
| segment are rendered (and prerolled). Subclasses should do any subbuffer |
| clipping themselves when needed.</p> |
| <p><a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a> will by default report the current playback position in |
| <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstFormat.html#GST-FORMAT-TIME:CAPS"><code class="literal">GST_FORMAT_TIME</code></a> based on the current clock time and segment information. |
| If no clock has been set on the element, the query will be forwarded |
| upstream.</p> |
| <p>The <a class="link" href="GstBaseSink.html#GstBaseSinkClass.set-caps"><code class="function">GstBaseSinkClass.set_caps()</code></a> function will be called when the subclass |
| should configure itself to process a specific media type.</p> |
| <p>The <a class="link" href="GstBaseSink.html#GstBaseSinkClass.start"><code class="function">GstBaseSinkClass.start()</code></a> and <a class="link" href="GstBaseSink.html#GstBaseSinkClass.stop"><code class="function">GstBaseSinkClass.stop()</code></a> virtual methods |
| will be called when resources should be allocated. Any |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.preroll"><code class="function">GstBaseSinkClass.preroll()</code></a>, <a class="link" href="GstBaseSink.html#GstBaseSinkClass.render"><code class="function">GstBaseSinkClass.render()</code></a> and |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.set-caps"><code class="function">GstBaseSinkClass.set_caps()</code></a> function will be called between the |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.start"><code class="function">GstBaseSinkClass.start()</code></a> and <a class="link" href="GstBaseSink.html#GstBaseSinkClass.stop"><code class="function">GstBaseSinkClass.stop()</code></a> calls.</p> |
| <p>The <a class="link" href="GstBaseSink.html#GstBaseSinkClass.event"><code class="function">GstBaseSinkClass.event()</code></a> virtual method will be called when an event is |
| received by <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a>. Normally this method should only be overridden by |
| very specific elements (such as file sinks) which need to handle the |
| newsegment event specially.</p> |
| <p>The <a class="link" href="GstBaseSink.html#GstBaseSinkClass.unlock"><code class="function">GstBaseSinkClass.unlock()</code></a> method is called when the elements should |
| unblock any blocking operations they perform in the |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.render"><code class="function">GstBaseSinkClass.render()</code></a> method. This is mostly useful when the |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.render"><code class="function">GstBaseSinkClass.render()</code></a> method performs a blocking write on a file |
| descriptor, for example.</p> |
| <p>The <a class="link" href="GstBaseSink.html#GstBaseSink--max-lateness" title="The “max-lateness” property"><span class="type">“max-lateness”</span></a> property affects how the sink deals with |
| buffers that arrive too late in the sink. A buffer arrives too late in the |
| sink when the presentation time (as a combination of the last segment, buffer |
| timestamp and element base_time) plus the duration is before the current |
| time of the clock. |
| If the frame is later than max-lateness, the sink will drop the buffer |
| without calling the render method. |
| This feature is disabled if sync is disabled, the |
| <a class="link" href="GstBaseSink.html#GstBaseSinkClass.get-times"><code class="function">GstBaseSinkClass.get_times()</code></a> method does not return a valid start time or |
| max-lateness is set to -1 (the default). |
| Subclasses can use <a class="link" href="GstBaseSink.html#gst-base-sink-set-max-lateness" title="gst_base_sink_set_max_lateness ()"><code class="function">gst_base_sink_set_max_lateness()</code></a> to configure the |
| max-lateness value.</p> |
| <p>The <a class="link" href="GstBaseSink.html#GstBaseSink--qos" title="The “qos” property"><span class="type">“qos”</span></a> property will enable the quality-of-service features of |
| the basesink which gather statistics about the real-time performance of the |
| clock synchronisation. For each buffer received in the sink, statistics are |
| gathered and a QOS event is sent upstream with these numbers. This |
| information can then be used by upstream elements to reduce their processing |
| rate, for example.</p> |
| <p>The <a class="link" href="GstBaseSink.html#GstBaseSink--async" title="The “async” property"><span class="type">“async”</span></a> property can be used to instruct the sink to never |
| perform an ASYNC state change. This feature is mostly usable when dealing |
| with non-synchronized streams or sparse streams.</p> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.functions_details"></a><h2>Functions</h2> |
| <div class="refsect2"> |
| <a name="gst-base-sink-query-latency"></a><h3>gst_base_sink_query_latency ()</h3> |
| <pre class="programlisting"><a href="https://developer.gnome.org/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="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *live</code></em>, |
| <em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *upstream_live</code></em>, |
| <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> *min_latency</code></em>, |
| <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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 <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> 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 <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> 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 <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, 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 positive value.</p> |
| <p>This function is mostly used by subclasses.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.2.7"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>live</p></td> |
| <td class="parameter_description"><p> if the sink is live. </p></td> |
| <td class="parameter_annotations"><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 class="parameter_name"><p>upstream_live</p></td> |
| <td class="parameter_description"><p> if an upstream element is live. </p></td> |
| <td class="parameter_annotations"><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 class="parameter_name"><p>min_latency</p></td> |
| <td class="parameter_description"><p> the min latency of the upstream elements. </p></td> |
| <td class="parameter_annotations"><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 class="parameter_name"><p>max_latency</p></td> |
| <td class="parameter_description"><p> the max latency of the upstream elements. </p></td> |
| <td class="parameter_annotations"><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> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.2.8"></a><h4>Returns</h4> |
| <p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the query succeeded.</p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="refsect3"> |
| <a name="id-1.2.4.5.9.3.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.3.6"></a><h4>Returns</h4> |
| <p> The configured latency.</p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="refsect3"> |
| <a name="id-1.2.4.5.9.4.6"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>obj</p></td> |
| <td class="parameter_description"><p> the mini object that caused the preroll. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.4.7"></a><h4>Returns</h4> |
| <p> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GST-FLOW-OK:CAPS"><code class="literal">GST_FLOW_OK</code></a> if the preroll completed and processing can |
| continue. Any other return value should be returned from the render vmethod.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-wait"></a><h3>gst_base_sink_wait ()</h3> |
| <pre class="programlisting"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstFlowReturn"><span class="returnvalue">GstFlowReturn</span></a> |
| gst_base_sink_wait (<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://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>, |
| <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTimeDiff"><span class="type">GstClockTimeDiff</span></a> *jitter</code></em>);</pre> |
| <p>This function will wait for preroll to complete and will then block until <em class="parameter"><code>time</code></em> |
| |
| is reached. It is usually called by subclasses that use their own internal |
| synchronisation but want to let some synchronization (like EOS) be handled |
| by the base class.</p> |
| <p>This function should only be called with the PREROLL_LOCK held (like when |
| receiving an EOS event in the ::event vmethod or when handling buffers in |
| ::render).</p> |
| <p>The <em class="parameter"><code>time</code></em> |
| argument should be the running_time of when the timeout should happen |
| and will be adjusted with any latency and offset configured in the sink.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.5.7"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>time</p></td> |
| <td class="parameter_description"><p>the running_time to be reached</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>jitter</p></td> |
| <td class="parameter_description"><p> the jitter to be filled with time diff, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td> |
| <td class="parameter_annotations"><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> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.5.8"></a><h4>Returns</h4> |
| <p> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GstFlowReturn"><span class="type">GstFlowReturn</span></a></p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GST-FLOW-OK:CAPS"><code class="literal">GST_FLOW_OK</code></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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GST-FLOW-FLUSHING:CAPS"><code class="literal">GST_FLOW_FLUSHING</code></a>).</p> |
| <p>This function should only be called with the PREROLL_LOCK held, like in the |
| render function.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.6.7"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.6.8"></a><h4>Returns</h4> |
| <p> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#GST-FLOW-OK:CAPS"><code class="literal">GST_FLOW_OK</code></a> if the preroll completed and processing can |
| continue. Any other return value should be returned from the render vmethod.</p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockTime"><span class="type">GstClockTime</span></a> time</code></em>, |
| <em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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 synchronisation is done and <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-BADTIME:CAPS"><code class="literal">GST_CLOCK_BADTIME</code></a> is |
| returned. Likewise, if synchronisation is disabled in the element or there |
| is no clock, no synchronisation is done and <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GST-CLOCK-BADTIME:CAPS"><code class="literal">GST_CLOCK_BADTIME</code></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="refsect3"> |
| <a name="id-1.2.4.5.9.7.8"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>time</p></td> |
| <td class="parameter_description"><p>the running_time to be reached</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>jitter</p></td> |
| <td class="parameter_description"><p> the jitter to be filled with time diff, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td> |
| <td class="parameter_annotations"><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> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.7.9"></a><h4>Returns</h4> |
| <p> <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstClock.html#GstClockReturn"><span class="type">GstClockReturn</span></a></p> |
| </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="https://developer.gnome.org/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 <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, incoming samples will be played as fast as |
| possible. If <em class="parameter"><code>sync</code></em> |
| is <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, the timestamps of the incoming |
| buffers will be used to schedule the exact render time of its |
| contents.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.8.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>sync</p></td> |
| <td class="parameter_description"><p>the new sync value.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </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="https://developer.gnome.org/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="refsect3"> |
| <a name="id-1.2.4.5.9.9.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.9.6"></a><h4>Returns</h4> |
| <p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the sink is configured to synchronize against the clock.</p> |
| </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="refsect3"> |
| <a name="id-1.2.4.5.9.10.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>max_lateness</p></td> |
| <td class="parameter_description"><p>the new max lateness value.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </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="refsect3"> |
| <a name="id-1.2.4.5.9.11.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.11.6"></a><h4>Returns</h4> |
| <p> 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.</p> |
| </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="https://developer.gnome.org/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="refsect3"> |
| <a name="id-1.2.4.5.9.12.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>enabled</p></td> |
| <td class="parameter_description"><p>the new qos value.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </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="https://developer.gnome.org/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="refsect3"> |
| <a name="id-1.2.4.5.9.13.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.13.6"></a><h4>Returns</h4> |
| <p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the sink is configured to perform Quality-of-Service.</p> |
| </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="https://developer.gnome.org/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 asynchronously. 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="refsect3"> |
| <a name="id-1.2.4.5.9.14.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>enabled</p></td> |
| <td class="parameter_description"><p>the new async value.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </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="https://developer.gnome.org/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="refsect3"> |
| <a name="id-1.2.4.5.9.15.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.15.6"></a><h4>Returns</h4> |
| <p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the sink is configured to perform asynchronous state |
| changes.</p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="refsect3"> |
| <a name="id-1.2.4.5.9.16.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>offset</p></td> |
| <td class="parameter_description"><p>the new offset</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="refsect3"> |
| <a name="id-1.2.4.5.9.17.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.17.6"></a><h4>Returns</h4> |
| <p> The synchronisation offset.</p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="refsect3"> |
| <a name="id-1.2.4.5.9.18.7"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>delay</p></td> |
| <td class="parameter_description"><p>the new delay</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/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="refsect3"> |
| <a name="id-1.2.4.5.9.19.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.19.6"></a><h4>Returns</h4> |
| <p> the render delay of <em class="parameter"><code>sink</code></em> |
| .</p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSample.html"><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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstCaps.html"><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="refsect3"> |
| <a name="id-1.2.4.5.9.20.7"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.20.8"></a><h4>Returns</h4> |
| <p> a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSample.html"><span class="type">GstSample</span></a>. <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSample.html#gst-sample-unref"><code class="function">gst_sample_unref()</code></a> after |
| usage. This function returns <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when no buffer has arrived in the |
| sink yet or when the sink is not in PAUSED or PLAYING. </p> |
| <p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p> |
| </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="https://developer.gnome.org/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="refsect3"> |
| <a name="id-1.2.4.5.9.21.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>blocksize</p></td> |
| <td class="parameter_description"><p>the blocksize in bytes</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </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="https://developer.gnome.org/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="refsect3"> |
| <a name="id-1.2.4.5.9.22.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.22.6"></a><h4>Returns</h4> |
| <p> the number of bytes <em class="parameter"><code>sink</code></em> |
| will pull in pull mode.</p> |
| </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="refsect3"> |
| <a name="id-1.2.4.5.9.23.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.23.6"></a><h4>Returns</h4> |
| <p> the number of nanoseconds <em class="parameter"><code>sink</code></em> |
| will put between frames.</p> |
| </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="refsect3"> |
| <a name="id-1.2.4.5.9.24.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>throttle</p></td> |
| <td class="parameter_description"><p>the throttle time in nanoseconds</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-max-bitrate"></a><h3>gst_base_sink_set_max_bitrate ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_base_sink_set_max_bitrate (<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> max_bitrate</code></em>);</pre> |
| <p>Set the maximum amount of bits per second that the sink will render.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.25.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>max_bitrate</p></td> |
| <td class="parameter_description"><p>the max_bitrate in bits per second</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-get-max-bitrate"></a><h3>gst_base_sink_get_max_bitrate ()</h3> |
| <pre class="programlisting"><span class="returnvalue">guint64</span> |
| gst_base_sink_get_max_bitrate (<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 maximum amount of bits per second that the sink will render.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.26.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBaseSink.html" title="GstBaseSink"><span class="type">GstBaseSink</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.26.6"></a><h4>Returns</h4> |
| <p> the maximum number of bits per second <em class="parameter"><code>sink</code></em> |
| will render.</p> |
| </div> |
| <p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-set-last-sample-enabled"></a><h3>gst_base_sink_set_last_sample_enabled ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| gst_base_sink_set_last_sample_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="https://developer.gnome.org/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 store the last received sample in the last-sample |
| property.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.27.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>enabled</p></td> |
| <td class="parameter_description"><p>the new enable-last-sample value.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-base-sink-is-last-sample-enabled"></a><h3>gst_base_sink_is_last_sample_enabled ()</h3> |
| <pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_base_sink_is_last_sample_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 store the last received sample in |
| the last-sample property.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.28.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>sink</p></td> |
| <td class="parameter_description"><p>the sink</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.28.6"></a><h4>Returns</h4> |
| <p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the sink is configured to store the last received sample.</p> |
| </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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html"><span class="type">GstPad</span></a> object of the element.</p> |
| <div class="refsect3"> |
| <a name="id-1.2.4.5.9.29.5"></a><h4>Parameters</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="150px" class="parameters_name"> |
| <col class="parameters_description"> |
| <col width="200px" class="parameters_annotations"> |
| </colgroup> |
| <tbody><tr> |
| <td class="parameter_name"><p>obj</p></td> |
| <td class="parameter_description"><p>base sink instance</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </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> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-BASE-SINK-PREROLL-WAIT-UNTIL:CAPS"></a><h3>GST_BASE_SINK_PREROLL_WAIT_UNTIL()</h3> |
| <pre class="programlisting">#define GST_BASE_SINK_PREROLL_WAIT_UNTIL(pad, end_time)</pre> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.other_details"></a><h2>Types and Values</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="refsect3"> |
| <a name="id-1.2.4.5.10.3.5"></a><h4>Members</h4> |
| <div class="informaltable"><table width="100%" border="0"> |
| <colgroup> |
| <col width="300px" class="struct_members_name"> |
| <col class="struct_members_description"> |
| <col width="200px" class="struct_members_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="struct_member_name"><p><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html#GstElementClass"><span class="type">GstElementClass</span></a> <em class="structfield"><code><a name="GstBaseSinkClass.parent-class"></a>parent_class</code></em>;</p></td> |
| <td class="struct_member_description"><p>Element parent class</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.get-caps"></a>get_caps</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Called to get sink pad caps from the subclass</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.set-caps"></a>set_caps</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Notify subclass of changed caps</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.fixate"></a>fixate</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Only useful in pull mode. Implement if you have |
| ideas about what should be the default values for the caps you support.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.activate-pull"></a>activate_pull</code></em> ()</p></td> |
| <td class="struct_member_description"><p>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.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.get-times"></a>get_times</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Called to get the start and end times for synchronising |
| the passed buffer to the clock</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.propose-allocation"></a>propose_allocation</code></em> ()</p></td> |
| <td class="struct_member_description"><p>configure the allocation query</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.start"></a>start</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Start processing. Ideal for opening resources in the subclass</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.stop"></a>stop</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Stop processing. Subclasses should use this to close resources.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.unlock"></a>unlock</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Unlock any pending access to the resource. Subclasses should |
| unblock any blocked function ASAP</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.unlock-stop"></a>unlock_stop</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Clear the previous unlock request. Subclasses should clear |
| any state they set during <code class="function">unlock()</code>, such as clearing command queues.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.query"></a>query</code></em> ()</p></td> |
| <td class="struct_member_description"><p>perform a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstQuery.html"><span class="type">GstQuery</span></a> on the element.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.event"></a>event</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Override this to handle events arriving on the sink pad</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.wait-event"></a>wait_event</code></em> ()</p></td> |
| <td class="struct_member_description"><p>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.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.prepare"></a>prepare</code></em> ()</p></td> |
| <td class="struct_member_description"><p>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.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.prepare-list"></a>prepare_list</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Called to prepare the buffer list for <em class="parameter"><code>render_list</code></em> |
| . This |
| function is called before synchronisation is performed.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.preroll"></a>preroll</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Called to present the preroll buffer if desired.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.render"></a>render</code></em> ()</p></td> |
| <td class="struct_member_description"><p>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.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstBaseSinkClass.render-list"></a>render_list</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Same as <em class="parameter"><code>render</code></em> |
| but used with buffer lists instead of |
| buffers.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </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="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>If set to <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, the basesink will perform asynchronous state changes. |
| When set to <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></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>Flags: Read / Write</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="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a></pre> |
| <p>The amount of bytes to pull when operating in pull mode.</p> |
| <p>Flags: Read / Write</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="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Enable the last-sample property. If <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, basesink doesn't keep a |
| reference to the last buffer arrived and the last-sample property is always |
| set to <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. 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>Flags: Read / Write</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="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstSample.html"><span class="type">GstSample</span></a> *</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 <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when the sink has not yet received a buffer.</p> |
| <p>Flags: Read</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstBaseSink--max-bitrate"></a><h3>The <code class="literal">“max-bitrate”</code> property</h3> |
| <pre class="programlisting"> “max-bitrate” <span class="type">guint64</span></pre> |
| <p>Control the maximum amount of bits that will be rendered per second. |
| Setting this property to a value bigger than 0 will make the sink delay |
| rendering of the buffers when it would exceed to max-bitrate.</p> |
| <p>Flags: Read / Write</p> |
| <p>Default value: 0</p> |
| <p class="since">Since: <a class="link" href="ix05.html#api-index-1.2">1.2</a></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></pre> |
| <p>Maximum number of nanoseconds that a buffer can be late before it is dropped (-1 unlimited).</p> |
| <p>Flags: Read / Write</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="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Generate Quality-of-Service events upstream.</p> |
| <p>Flags: Read / Write</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></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>Flags: Read / Write</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="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre> |
| <p>Sync on the clock.</p> |
| <p>Flags: Read / Write</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></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>Flags: Read / Write</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></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>Flags: Read / Write</p> |
| <p>Default value: 0</p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="GstBaseSink.see-also"></a><h2>See Also</h2> |
| <p><a class="link" href="GstBaseTransform.html" title="GstBaseTransform"><span class="type">GstBaseTransform</span></a>, <a class="link" href="GstBaseSrc.html" title="GstBaseSrc"><span class="type">GstBaseSrc</span></a></p> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr>Generated by GTK-Doc V1.24</div> |
| </body> |
| </html> |
