GstApp-1.0.gir

<?xml version="1.0"?>
<!-- This file was automatically generated from C sources - DO NOT EDIT!
To affect the contents of this file, edit the original C definitions,
and/or use gtk-doc annotations.  -->
<repository xmlns="http://www.gtk.org/introspection/core/1.0" xmlns:c="http://www.gtk.org/introspection/c/1.0" xmlns:doc="http://www.gtk.org/introspection/doc/1.0" xmlns:glib="http://www.gtk.org/introspection/glib/1.0" version="1.2">
  <include name="Gst" version="1.0"/>
  <include name="GstBase" version="1.0"/>
  <package name="gstreamer-app-1.0"/>
  <c:include name="gst/app/app.h"/>
  <doc:format name="unknown"/>
  <namespace name="GstApp" version="1.0" shared-library="libgstapp-1.0.so.0" c:identifier-prefixes="Gst" c:symbol-prefixes="gst">
    <function-macro name="APP_DEPRECATED_FOR" c:identifier="GST_APP_DEPRECATED_FOR" introspectable="0">
      <parameters>
        <parameter name="f">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_DEPRECATED_TYPE_FOR" c:identifier="GST_APP_DEPRECATED_TYPE_FOR" introspectable="0">
      <parameters>
        <parameter name="f">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SINK" c:identifier="GST_APP_SINK" introspectable="0">
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SINK_CAST" c:identifier="GST_APP_SINK_CAST" introspectable="0">
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SINK_CLASS" c:identifier="GST_APP_SINK_CLASS" introspectable="0">
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SRC" c:identifier="GST_APP_SRC" introspectable="0">
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SRC_CAST" c:identifier="GST_APP_SRC_CAST" introspectable="0">
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SRC_CLASS" c:identifier="GST_APP_SRC_CLASS" introspectable="0">
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <enumeration name="AppLeakyType" version="1.20" glib:type-name="GstAppLeakyType" glib:get-type="gst_app_leaky_type_get_type" c:type="GstAppLeakyType">
      <doc xml:space="preserve">Buffer dropping scheme to avoid the element's internal queue to block when
full.</doc>
      <member name="none" value="0" c:identifier="GST_APP_LEAKY_TYPE_NONE" glib:nick="none" glib:name="GST_APP_LEAKY_TYPE_NONE">
        <doc xml:space="preserve">Not Leaky</doc>
      </member>
      <member name="upstream" value="1" c:identifier="GST_APP_LEAKY_TYPE_UPSTREAM" glib:nick="upstream" glib:name="GST_APP_LEAKY_TYPE_UPSTREAM">
        <doc xml:space="preserve">Leaky on upstream (new buffers)</doc>
      </member>
      <member name="downstream" value="2" c:identifier="GST_APP_LEAKY_TYPE_DOWNSTREAM" glib:nick="downstream" glib:name="GST_APP_LEAKY_TYPE_DOWNSTREAM">
        <doc xml:space="preserve">Leaky on downstream (old buffers)</doc>
      </member>
    </enumeration>
    <class name="AppSink" c:symbol-prefix="app_sink" c:type="GstAppSink" parent="GstBase.BaseSink" glib:type-name="GstAppSink" glib:get-type="gst_app_sink_get_type" glib:type-struct="AppSinkClass">
      <doc xml:space="preserve">Appsink is a sink plugin that supports many different methods for making
the application get a handle on the GStreamer data in a pipeline. Unlike
most GStreamer elements, Appsink provides external API functions.

appsink can be used by linking to the gstappsink.h header file to access the
methods or by using the appsink action signals and properties.

The normal way of retrieving samples from appsink is by using the
gst_app_sink_pull_sample() and gst_app_sink_pull_preroll() methods.
These methods block until a sample becomes available in the sink or when the
sink is shut down or reaches EOS. There are also timed variants of these
methods, gst_app_sink_try_pull_sample() and gst_app_sink_try_pull_preroll(),
which accept a timeout parameter to limit the amount of time to wait.

Appsink will internally use a queue to collect buffers from the streaming
thread. If the application is not pulling samples fast enough, this queue
will consume a lot of memory over time. The "max-buffers", "max-time" and "max-bytes"
properties can be used to limit the queue size. The "leaky-type" property controls whether the
streaming thread blocks or if older buffers are dropped when the maximum
queue size is reached. Note that blocking the streaming thread can negatively
affect real-time performance and should be avoided.

If a blocking behaviour is not desirable, setting the "emit-signals" property
to %TRUE will make appsink emit the "new-sample" and "new-preroll" signals
when a sample can be pulled without blocking.

The "caps" property on appsink can be used to control the formats that
appsink can receive. This property can contain non-fixed caps, the format of
the pulled samples can be obtained by getting the sample caps.

If one of the pull-preroll or pull-sample methods return %NULL, the appsink
is stopped or in the EOS state. You can check for the EOS state with the
"eos" property or with the gst_app_sink_is_eos() method.

The eos signal can also be used to be informed when the EOS state is reached
to avoid polling.</doc>
      <implements name="Gst.URIHandler"/>
      <virtual-method name="eos">
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="new_preroll">
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="new_sample">
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="pull_preroll" invoker="pull_preroll">
        <doc xml:space="preserve">Get the last preroll sample in @appsink. This was the sample that caused the
appsink to preroll in the PAUSED state.

This function is typically used when dealing with a pipeline in the PAUSED
state. Calling this function after doing a seek will give the sample right
after the seek position.

Calling this function will clear the internal reference to the preroll
buffer.

Note that the preroll sample will also be returned as the first sample
when calling gst_app_sink_pull_sample().

If an EOS event was received before any buffers, this function returns
%NULL. Use gst_app_sink_is_eos () to check for the EOS condition.

This function blocks until a preroll sample or EOS is received or the appsink
element is set to the READY/NULL state.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="pull_sample" invoker="pull_sample">
        <doc xml:space="preserve">This function blocks until a sample or EOS becomes available or the appsink
element is set to the READY/NULL state.

This function will only return samples when the appsink is in the PLAYING
state. All rendered buffers will be put in a queue so that the application
can pull samples at its own rate. Note that when the application does not
pull samples fast enough, the queued buffers could consume a lot of memory,
especially when dealing with raw video frames.

If an EOS event was received before any buffers, this function returns
%NULL. Use gst_app_sink_is_eos () to check for the EOS condition.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="try_pull_object" invoker="try_pull_object" version="1.20">
        <doc xml:space="preserve">This function blocks until a sample or an event or EOS becomes available or the appsink
element is set to the READY/NULL state or the timeout expires.

This function will only return samples when the appsink is in the PLAYING
state. All rendered buffers and events will be put in a queue so that the application
can pull them at its own rate. Note that when the application does not
pull samples fast enough, the queued buffers could consume a lot of memory,
especially when dealing with raw video frames.
Events can be pulled when the appsink is in the READY, PAUSED or PLAYING state.

This function will only pull serialized events, excluding
the EOS event for which this functions returns
%NULL. Use gst_app_sink_is_eos() to check for the EOS condition.

This method is a variant of gst_app_sink_try_pull_sample() that can be used
to handle incoming events events as well as samples.

Note that future releases may extend this API to return other object types
so make sure that your code is checking for the actual type it is handling.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample, or #GstEvent or NULL when the appsink is stopped or EOS or the timeout expires.
Call gst_mini_object_unref() after usage.</doc>
          <type name="Gst.MiniObject" c:type="GstMiniObject*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="try_pull_preroll" invoker="try_pull_preroll" version="1.10">
        <doc xml:space="preserve">Get the last preroll sample in @appsink. This was the sample that caused the
appsink to preroll in the PAUSED state.

This function is typically used when dealing with a pipeline in the PAUSED
state. Calling this function after doing a seek will give the sample right
after the seek position.

Calling this function will clear the internal reference to the preroll
buffer.

Note that the preroll sample will also be returned as the first sample
when calling gst_app_sink_pull_sample().

If an EOS event was received before any buffers or the timeout expires,
this function returns %NULL. Use gst_app_sink_is_eos () to check for the EOS
condition.

This function blocks until a preroll sample or EOS is received, the appsink
element is set to the READY/NULL state, or the timeout expires.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS or the timeout expires.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for the preroll sample</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="try_pull_sample" invoker="try_pull_sample" version="1.10">
        <doc xml:space="preserve">This function blocks until a sample or EOS becomes available or the appsink
element is set to the READY/NULL state or the timeout expires.

This function will only return samples when the appsink is in the PLAYING
state. All rendered buffers will be put in a queue so that the application
can pull samples at its own rate. Note that when the application does not
pull samples fast enough, the queued buffers could consume a lot of memory,
especially when dealing with raw video frames.

If an EOS event was received before any buffers or the timeout expires,
this function returns %NULL. Use gst_app_sink_is_eos () to check for the EOS
condition.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS or the timeout expires.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </virtual-method>
      <method name="get_buffer_list_support" c:identifier="gst_app_sink_get_buffer_list_support" version="1.12">
        <doc xml:space="preserve">Check if @appsink supports buffer lists.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if @appsink supports buffer lists.</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_caps" c:identifier="gst_app_sink_get_caps" glib:get-property="caps">
        <doc xml:space="preserve">Get the configured caps on @appsink.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">the #GstCaps accepted by the sink. gst_caps_unref() after usage.</doc>
          <type name="Gst.Caps" c:type="GstCaps*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_current_level_buffers" c:identifier="gst_app_sink_get_current_level_buffers" glib:get-property="current-level-buffers" version="1.28">
        <doc xml:space="preserve">Get the number of currently queued buffers inside @appsink.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The number of currently queued buffers.</doc>
          <type name="guint64" c:type="guint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_current_level_bytes" c:identifier="gst_app_sink_get_current_level_bytes" glib:get-property="current-level-bytes" version="1.28">
        <doc xml:space="preserve">Get the number of currently queued bytes inside @appsink.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The number of currently queued bytes.</doc>
          <type name="guint64" c:type="guint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_current_level_time" c:identifier="gst_app_sink_get_current_level_time" glib:get-property="current-level-time" version="1.28">
        <doc xml:space="preserve">Get the amount of currently queued time inside @appsink.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The amount of currently queued time.</doc>
          <type name="Gst.ClockTime" c:type="GstClockTime"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_drop" c:identifier="gst_app_sink_get_drop" glib:get-property="drop" deprecated="1" deprecated-version="1.28">
        <doc xml:space="preserve">Check if @appsink will drop old buffers when the maximum amount of queued
data is reached (meaning max buffers, time or bytes limit, whichever is hit first).</doc>
        <doc-deprecated xml:space="preserve">Use gst_app_src_get_leaky_type() instead.</doc-deprecated>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if @appsink is dropping old buffers when the queue is
filled.</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_emit_signals" c:identifier="gst_app_sink_get_emit_signals" glib:get-property="emit-signals">
        <doc xml:space="preserve">Check if appsink will emit the "new-preroll" and "new-sample" signals.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if @appsink is emitting the "new-preroll" and "new-sample"
signals.</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_leaky_type" c:identifier="gst_app_sink_get_leaky_type" glib:get-property="leaky-type" version="1.28">
        <doc xml:space="preserve">Returns the currently set #GstAppLeakyType. See gst_app_sink_set_leaky_type()
for more details.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The currently set #GstAppLeakyType.</doc>
          <type name="AppLeakyType" c:type="GstAppLeakyType"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_max_buffers" c:identifier="gst_app_sink_get_max_buffers" glib:get-property="max-buffers">
        <doc xml:space="preserve">Get the maximum amount of buffers that can be queued in @appsink.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The maximum amount of buffers that can be queued.</doc>
          <type name="guint" c:type="guint"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_max_bytes" c:identifier="gst_app_sink_get_max_bytes" glib:get-property="max-bytes" version="1.24">
        <doc xml:space="preserve">Get the maximum total size, in bytes, that can be queued in @appsink.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The maximum amount of bytes that can be queued</doc>
          <type name="guint64" c:type="guint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_max_time" c:identifier="gst_app_sink_get_max_time" glib:get-property="max-time" version="1.24">
        <doc xml:space="preserve">Get the maximum total duration that can be queued in @appsink.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The maximum total duration that can be queued.</doc>
          <type name="Gst.ClockTime" c:type="GstClockTime"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_wait_on_eos" c:identifier="gst_app_sink_get_wait_on_eos" glib:get-property="wait-on-eos">
        <doc xml:space="preserve">Check if @appsink will wait for all buffers to be consumed when an EOS is
received.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if @appsink will wait for all buffers to be consumed when an
EOS is received.</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="is_eos" c:identifier="gst_app_sink_is_eos" glib:get-property="eos">
        <doc xml:space="preserve">Check if @appsink is EOS, which is when no more samples can be pulled because
an EOS event was received.

This function also returns %TRUE when the appsink is not in the PAUSED or
PLAYING state.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if no more samples can be pulled and the appsink is EOS.</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="pull_object" c:identifier="gst_app_sink_pull_object" version="1.20">
        <doc xml:space="preserve">This function blocks until a sample or an event becomes available or the appsink
element is set to the READY/NULL state.

This function will only return samples when the appsink is in the PLAYING
state. All rendered buffers and events will be put in a queue so that the application
can pull them at its own rate. Note that when the application does not
pull samples fast enough, the queued buffers could consume a lot of memory,
especially when dealing with raw video frames.
Events can be pulled when the appsink is in the READY, PAUSED or PLAYING state.

This function will only pull serialized events, excluding
the EOS event for which this functions returns
%NULL. Use gst_app_sink_is_eos() to check for the EOS condition.

This method is a variant of gst_app_sink_pull_sample() that can be used
to handle incoming events events as well as samples.

Note that future releases may extend this API to return other object types
so make sure that your code is checking for the actual type it is handling.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample, or a #GstEvent or NULL when the appsink is stopped or EOS.
         Call gst_mini_object_unref() after usage.</doc>
          <type name="Gst.MiniObject" c:type="GstMiniObject*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="pull_preroll" c:identifier="gst_app_sink_pull_preroll">
        <doc xml:space="preserve">Get the last preroll sample in @appsink. This was the sample that caused the
appsink to preroll in the PAUSED state.

This function is typically used when dealing with a pipeline in the PAUSED
state. Calling this function after doing a seek will give the sample right
after the seek position.

Calling this function will clear the internal reference to the preroll
buffer.

Note that the preroll sample will also be returned as the first sample
when calling gst_app_sink_pull_sample().

If an EOS event was received before any buffers, this function returns
%NULL. Use gst_app_sink_is_eos () to check for the EOS condition.

This function blocks until a preroll sample or EOS is received or the appsink
element is set to the READY/NULL state.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="pull_sample" c:identifier="gst_app_sink_pull_sample">
        <doc xml:space="preserve">This function blocks until a sample or EOS becomes available or the appsink
element is set to the READY/NULL state.

This function will only return samples when the appsink is in the PLAYING
state. All rendered buffers will be put in a queue so that the application
can pull samples at its own rate. Note that when the application does not
pull samples fast enough, the queued buffers could consume a lot of memory,
especially when dealing with raw video frames.

If an EOS event was received before any buffers, this function returns
%NULL. Use gst_app_sink_is_eos () to check for the EOS condition.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="set_buffer_list_support" c:identifier="gst_app_sink_set_buffer_list_support" version="1.12">
        <doc xml:space="preserve">Instruct @appsink to enable or disable buffer list support.

For backwards-compatibility reasons applications need to opt in
to indicate that they will be able to handle buffer lists.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="enable_lists" transfer-ownership="none">
            <doc xml:space="preserve">enable or disable buffer list support</doc>
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_callbacks" c:identifier="gst_app_sink_set_callbacks" introspectable="0">
        <doc xml:space="preserve">Set callbacks which will be executed for each new preroll, new sample and eos.
This is an alternative to using the signals, it has lower overhead and is thus
less expensive, but also less flexible.

If callbacks are installed, no signals will be emitted for performance
reasons.

Before 1.16.3 it was not possible to change the callbacks in a thread-safe
way.

Since 1.28.3 it is allowed to set the @callbacks to %NULL to unset them.

Note that gst_app_sink_set_callbacks() and
gst_app_sink_set_simple_callbacks() are mutually exclusive and setting one
will unset the other.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="callbacks" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkCallbacks" c:type="GstAppSinkCallbacks*"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">a user_data argument for the callbacks</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">a destroy notify function</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_caps" c:identifier="gst_app_sink_set_caps" glib:set-property="caps">
        <doc xml:space="preserve">Set the capabilities on the appsink element.  This function takes
a copy of the caps structure. After calling this method, the sink will only
accept caps that match @caps. If @caps is non-fixed, or incomplete,
you must check the caps on the samples to get the actual used caps.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">caps to set</doc>
            <type name="Gst.Caps" c:type="const GstCaps*"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_drop" c:identifier="gst_app_sink_set_drop" glib:set-property="drop" deprecated="1" deprecated-version="1.28">
        <doc xml:space="preserve">Instruct @appsink to drop old buffers when the maximum amount of queued
data is reached, that is, when any configured limit is hit (max-buffers, max-time or max-bytes).</doc>
        <doc-deprecated xml:space="preserve">Use gst_app_src_get_leaky_type() instead.</doc-deprecated>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="drop" transfer-ownership="none">
            <doc xml:space="preserve">the new state</doc>
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_emit_signals" c:identifier="gst_app_sink_set_emit_signals" glib:set-property="emit-signals">
        <doc xml:space="preserve">Make appsink emit the "new-preroll" and "new-sample" signals. This option is
by default disabled because signal emission is expensive and unneeded when
the application prefers to operate in pull mode.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="emit" transfer-ownership="none">
            <doc xml:space="preserve">the new state</doc>
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_leaky_type" c:identifier="gst_app_sink_set_leaky_type" glib:set-property="leaky-type" version="1.28">
        <doc xml:space="preserve">When set to any other value than GST_APP_LEAKY_TYPE_NONE then the appsink
will drop any buffers that are pushed into it once its internal queue is
full. The selected type defines whether to drop the oldest or new
buffers.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="leaky" transfer-ownership="none">
            <doc xml:space="preserve">the #GstAppLeakyType</doc>
            <type name="AppLeakyType" c:type="GstAppLeakyType"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_buffers" c:identifier="gst_app_sink_set_max_buffers" glib:set-property="max-buffers">
        <doc xml:space="preserve">Set the maximum amount of buffers that can be queued in @appsink. After this
amount of buffers are queued in appsink, any more buffers will block upstream
elements until a sample is pulled from @appsink, unless 'drop' is set, in which
case new buffers will be discarded.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve">the maximum number of buffers to queue</doc>
            <type name="guint" c:type="guint"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_bytes" c:identifier="gst_app_sink_set_max_bytes" glib:set-property="max-bytes" version="1.24">
        <doc xml:space="preserve">Set the maximum total size that can be queued in @appsink. After this
amount of buffers are queued in appsink, any more buffers will block upstream
elements until a sample is pulled from @appsink, unless 'drop' is set, in which
case new buffers will be discarded.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve">the maximum total size of buffers to queue, in bytes</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_time" c:identifier="gst_app_sink_set_max_time" glib:set-property="max-time" version="1.24">
        <doc xml:space="preserve">Set the maximum total duration that can be queued in @appsink. After this
amount of buffers are queued in appsink, any more buffers will block upstream
elements until a sample is pulled from @appsink, unless 'drop' is set, in which
case new buffers will be discarded.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve">the maximum total duration to queue</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_simple_callbacks" c:identifier="gst_app_sink_set_simple_callbacks" version="1.28">
        <doc xml:space="preserve">Set callbacks which will be executed for each new preroll, new sample and eos.
This is an alternative to using the signals, it has lower overhead and is thus
less expensive, but also less flexible.

If callbacks are installed, no signals will be emitted for performance
reasons.

Once @cb is set on an #GstAppSink it is not possible anymore to change any of
the callbacks inside it.

Note that gst_app_sink_set_callbacks() and
gst_app_sink_set_simple_callbacks() are mutually exclusive and setting one
will unset the other.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="cb" transfer-ownership="full" nullable="1" allow-none="1">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_wait_on_eos" c:identifier="gst_app_sink_set_wait_on_eos" glib:set-property="wait-on-eos">
        <doc xml:space="preserve">Instruct @appsink to wait for all buffers to be consumed when an EOS is received.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="wait" transfer-ownership="none">
            <doc xml:space="preserve">the new state</doc>
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
      <method name="try_pull_object" c:identifier="gst_app_sink_try_pull_object" version="1.20">
        <doc xml:space="preserve">This function blocks until a sample or an event or EOS becomes available or the appsink
element is set to the READY/NULL state or the timeout expires.

This function will only return samples when the appsink is in the PLAYING
state. All rendered buffers and events will be put in a queue so that the application
can pull them at its own rate. Note that when the application does not
pull samples fast enough, the queued buffers could consume a lot of memory,
especially when dealing with raw video frames.
Events can be pulled when the appsink is in the READY, PAUSED or PLAYING state.

This function will only pull serialized events, excluding
the EOS event for which this functions returns
%NULL. Use gst_app_sink_is_eos() to check for the EOS condition.

This method is a variant of gst_app_sink_try_pull_sample() that can be used
to handle incoming events events as well as samples.

Note that future releases may extend this API to return other object types
so make sure that your code is checking for the actual type it is handling.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample, or #GstEvent or NULL when the appsink is stopped or EOS or the timeout expires.
Call gst_mini_object_unref() after usage.</doc>
          <type name="Gst.MiniObject" c:type="GstMiniObject*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </method>
      <method name="try_pull_preroll" c:identifier="gst_app_sink_try_pull_preroll" version="1.10">
        <doc xml:space="preserve">Get the last preroll sample in @appsink. This was the sample that caused the
appsink to preroll in the PAUSED state.

This function is typically used when dealing with a pipeline in the PAUSED
state. Calling this function after doing a seek will give the sample right
after the seek position.

Calling this function will clear the internal reference to the preroll
buffer.

Note that the preroll sample will also be returned as the first sample
when calling gst_app_sink_pull_sample().

If an EOS event was received before any buffers or the timeout expires,
this function returns %NULL. Use gst_app_sink_is_eos () to check for the EOS
condition.

This function blocks until a preroll sample or EOS is received, the appsink
element is set to the READY/NULL state, or the timeout expires.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS or the timeout expires.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for the preroll sample</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </method>
      <method name="try_pull_sample" c:identifier="gst_app_sink_try_pull_sample" version="1.10">
        <doc xml:space="preserve">This function blocks until a sample or EOS becomes available or the appsink
element is set to the READY/NULL state or the timeout expires.

This function will only return samples when the appsink is in the PLAYING
state. All rendered buffers will be put in a queue so that the application
can pull samples at its own rate. Note that when the application does not
pull samples fast enough, the queued buffers could consume a lot of memory,
especially when dealing with raw video frames.

If an EOS event was received before any buffers or the timeout expires,
this function returns %NULL. Use gst_app_sink_is_eos () to check for the EOS
condition.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS or the timeout expires.
         Call gst_sample_unref() after usage.</doc>
          <type name="Gst.Sample" c:type="GstSample*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsink" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </method>
      <property name="buffer-list" writable="1" transfer-ownership="none" default-value="FALSE">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="caps" writable="1" transfer-ownership="none" setter="set_caps" getter="get_caps">
        <type name="Gst.Caps"/>
      </property>
      <property name="current-level-buffers" version="1.28" transfer-ownership="none" getter="get_current_level_buffers" default-value="0">
        <doc xml:space="preserve">The number of currently queued buffers inside appsink.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="current-level-bytes" version="1.28" transfer-ownership="none" getter="get_current_level_bytes" default-value="0">
        <doc xml:space="preserve">The number of currently queued bytes inside appsink.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="current-level-time" version="1.28" transfer-ownership="none" getter="get_current_level_time" default-value="0">
        <doc xml:space="preserve">The amount of currently queued time inside appsink.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="drop" deprecated="1" deprecated-version="1.28" writable="1" transfer-ownership="none" setter="set_drop" getter="get_drop" default-value="FALSE">
        <doc xml:space="preserve">Drop old buffers when the buffer queue is filled.</doc>
        <doc-deprecated xml:space="preserve">Use "leaky-type" property instead.</doc-deprecated>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="dropped" version="1.28" transfer-ownership="none" default-value="0">
        <doc xml:space="preserve">Number of buffers that were dropped.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="emit-signals" writable="1" transfer-ownership="none" setter="set_emit_signals" getter="get_emit_signals" default-value="FALSE">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="eos" transfer-ownership="none" getter="is_eos" default-value="TRUE">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="in" version="1.28" transfer-ownership="none" default-value="0">
        <doc xml:space="preserve">Number of input buffers that were queued.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="leaky-type" version="1.28" writable="1" transfer-ownership="none" setter="set_leaky_type" getter="get_leaky_type" default-value="GST_APP_LEAKY_TYPE_NONE">
        <doc xml:space="preserve">When set to any other value than GST_APP_LEAKY_TYPE_NONE then the appsink
will drop any buffers that are pushed into it once its internal queue is
full. The selected type defines whether to drop the oldest or new
buffers.</doc>
        <type name="AppLeakyType"/>
      </property>
      <property name="max-buffers" writable="1" transfer-ownership="none" setter="set_max_buffers" getter="get_max_buffers" default-value="0">
        <doc xml:space="preserve">Maximum amount of buffers in the queue (0 = unlimited).</doc>
        <type name="guint" c:type="guint"/>
      </property>
      <property name="max-bytes" version="1.24" writable="1" transfer-ownership="none" setter="set_max_bytes" getter="get_max_bytes" default-value="0">
        <doc xml:space="preserve">Maximum amount of bytes in the queue (0 = unlimited)</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="max-time" version="1.24" writable="1" transfer-ownership="none" setter="set_max_time" getter="get_max_time" default-value="0">
        <doc xml:space="preserve">Maximum total duration of data in the queue (0 = unlimited)</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="out" version="1.28" transfer-ownership="none" default-value="0">
        <doc xml:space="preserve">Number of output buffers that were dequeued.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="silent" version="1.28" writable="1" transfer-ownership="none" default-value="TRUE">
        <doc xml:space="preserve">Don't emit notify for input, output and dropped buffers.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="wait-on-eos" version="1.8" writable="1" transfer-ownership="none" setter="set_wait_on_eos" getter="get_wait_on_eos" default-value="TRUE">
        <doc xml:space="preserve">Wait for all buffers to be processed after receiving an EOS.

In cases where it is uncertain if an @appsink will have a consumer for its buffers
when it receives an EOS, set to %FALSE to ensure that the @appsink will not hang.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <field name="basesink">
        <type name="GstBase.BaseSink" c:type="GstBaseSink"/>
      </field>
      <field name="priv" readable="0" private="1">
        <type name="AppSinkPrivate" c:type="GstAppSinkPrivate*"/>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
      <glib:signal name="eos" when="last">
        <doc xml:space="preserve">Signal that the end-of-stream has been reached. This signal is emitted from
the streaming thread.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
      </glib:signal>
      <glib:signal name="new-preroll" when="last">
        <doc xml:space="preserve">Signal that a new preroll sample is available.

This signal is emitted from the streaming thread and only when the
"emit-signals" property is %TRUE.

The new preroll sample can be retrieved with the "pull-preroll" action
signal or gst_app_sink_pull_preroll() either from this signal callback
or from any other thread.

Note that this signal is only emitted when the "emit-signals" property is
set to %TRUE, which it is not by default for performance reasons.</doc>
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn"/>
        </return-value>
      </glib:signal>
      <glib:signal name="new-sample" when="last">
        <doc xml:space="preserve">Signal that a new sample is available.

This signal is emitted from the streaming thread and only when the
"emit-signals" property is %TRUE.

The new sample can be retrieved with the "pull-sample" action
signal or gst_app_sink_pull_sample() either from this signal callback
or from any other thread.

Note that this signal is only emitted when the "emit-signals" property is
set to %TRUE, which it is not by default for performance reasons.</doc>
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn"/>
        </return-value>
      </glib:signal>
      <glib:signal name="new-serialized-event" when="last" version="1.20">
        <doc xml:space="preserve">Signal that a new downstream serialized event is available.

This signal is emitted from the streaming thread and only when the
"emit-signals" property is %TRUE.

The new event can be retrieved with the "try-pull-object" action
signal or gst_app_sink_pull_object() either from this signal callback
or from any other thread.

EOS will not be notified using this signal, use #GstAppSink::eos instead.
EOS cannot be pulled either, use gst_app_sink_is_eos() to check for it.

Note that this signal is only emitted when the "emit-signals" property is
set to %TRUE, which it is not by default for performance reasons.

The callback should return %TRUE if the event has been handled, which will
skip basesink handling of the event, %FALSE otherwise.</doc>
        <return-value transfer-ownership="none">
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
      </glib:signal>
      <glib:signal name="propose-allocation" when="last" version="1.24">
        <doc xml:space="preserve">Signal that a new propose_allocation query is available.

This signal is emitted from the streaming thread and only when the
"emit-signals" property is %TRUE.</doc>
        <return-value transfer-ownership="none">
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <parameter name="query" transfer-ownership="none">
            <doc xml:space="preserve">the allocation query</doc>
            <type name="Gst.Query"/>
          </parameter>
        </parameters>
      </glib:signal>
      <glib:signal name="pull-preroll" when="last" action="1">
        <doc xml:space="preserve">Get the last preroll sample in @appsink. This was the sample that caused the
appsink to preroll in the PAUSED state.

This function is typically used when dealing with a pipeline in the PAUSED
state. Calling this function after doing a seek will give the sample right
after the seek position.

Calling this function will clear the internal reference to the preroll
buffer.

Note that the preroll sample will also be returned as the first sample
when calling gst_app_sink_pull_sample() or the "pull-sample" action signal.

If an EOS event was received before any buffers, this function returns
%NULL. Use gst_app_sink_is_eos () to check for the EOS condition.

This function blocks until a preroll sample or EOS is received or the appsink
element is set to the READY/NULL state.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or %NULL when the appsink is stopped or EOS.</doc>
          <type name="Gst.Sample"/>
        </return-value>
      </glib:signal>
      <glib:signal name="pull-sample" when="last" action="1">
        <doc xml:space="preserve">This function blocks until a sample or EOS becomes available or the appsink
element is set to the READY/NULL state.

This function will only return samples when the appsink is in the PLAYING
state. All rendered samples will be put in a queue so that the application
can pull samples at its own rate.

Note that when the application does not pull samples fast enough, the
queued samples could consume a lot of memory, especially when dealing with
raw video frames. It's possible to control the behaviour of the queue with
the "leaky-type" and "max-buffers" / "max-bytes" / "max-time" set of properties.

If an EOS event was received before any buffers, this function returns
%NULL. Use gst_app_sink_is_eos () to check for the EOS condition.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or %NULL when the appsink is stopped or EOS.</doc>
          <type name="Gst.Sample"/>
        </return-value>
      </glib:signal>
      <glib:signal name="try-pull-object" when="last" action="1" version="1.20">
        <doc xml:space="preserve">This function blocks until a sample or an event becomes available or the appsink
element is set to the READY/NULL state or the timeout expires.

This function will only return samples when the appsink is in the PLAYING
state. All rendered samples and events will be put in a queue so that the application
can pull them at its own rate.
Events can be pulled when the appsink is in the READY, PAUSED or PLAYING state.

Note that when the application does not pull samples fast enough, the
queued samples could consume a lot of memory, especially when dealing with
raw video frames. It's possible to control the behaviour of the queue with
the "leaky-type" and "max-buffers" / "max-bytes" / "max-time" set of properties.

This function will only pull serialized events, excluding
the EOS event for which this functions returns
%NULL. Use gst_app_sink_is_eos() to check for the EOS condition.

This signal is a variant of #GstAppSink::try-pull-sample: that can be used
to handle incoming events as well as samples.

Note that future releases may extend this API to return other object types
so make sure that your code is checking for the actual type it is handling.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or a #GstEvent or NULL when the appsink is stopped or EOS or the timeout expires.</doc>
          <type name="Gst.MiniObject"/>
        </return-value>
        <parameters>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </glib:signal>
      <glib:signal name="try-pull-preroll" when="last" action="1" version="1.10">
        <doc xml:space="preserve">Get the last preroll sample in @appsink. This was the sample that caused the
appsink to preroll in the PAUSED state.

This function is typically used when dealing with a pipeline in the PAUSED
state. Calling this function after doing a seek will give the sample right
after the seek position.

Calling this function will clear the internal reference to the preroll
buffer.

Note that the preroll sample will also be returned as the first sample
when calling gst_app_sink_pull_sample() or the "pull-sample" action signal.

If an EOS event was received before any buffers or the timeout expires,
this function returns %NULL. Use gst_app_sink_is_eos () to check for the EOS
condition.

This function blocks until a preroll sample or EOS is received, the appsink
element is set to the READY/NULL state, or the timeout expires.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or %NULL when the appsink
is stopped or EOS or the timeout expires.</doc>
          <type name="Gst.Sample"/>
        </return-value>
        <parameters>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for the preroll sample</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </glib:signal>
      <glib:signal name="try-pull-sample" when="last" action="1" version="1.10">
        <doc xml:space="preserve">This function blocks until a sample or EOS becomes available or the appsink
element is set to the READY/NULL state or the timeout expires.

This function will only return samples when the appsink is in the PLAYING
state. All rendered samples will be put in a queue so that the application
can pull samples at its own rate.

Note that when the application does not pull samples fast enough, the
queued samples could consume a lot of memory, especially when dealing with
raw video frames. It's possible to control the behaviour of the queue with
the "leaky-type" and "max-buffers" / "max-bytes" / "max-time" set of properties.

If an EOS event was received before any buffers or the timeout expires,
this function returns %NULL. Use gst_app_sink_is_eos () to check
for the EOS condition.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS or the timeout expires.</doc>
          <type name="Gst.Sample"/>
        </return-value>
        <parameters>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </glib:signal>
    </class>
    <record name="AppSinkCallbacks" c:type="GstAppSinkCallbacks" introspectable="0">
      <doc xml:space="preserve">A set of callbacks that can be installed on the appsink with
gst_app_sink_set_callbacks().</doc>
      <field name="eos">
        <doc xml:space="preserve">Called when the end-of-stream has been reached. This callback
      is called from the streaming thread.</doc>
        <callback name="eos">
          <return-value transfer-ownership="none">
            <type name="none" c:type="void"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="new_preroll">
        <doc xml:space="preserve">Called when a new preroll sample is available.
      This callback is called from the streaming thread.
      The new preroll sample can be retrieved with
      gst_app_sink_pull_preroll() either from this callback
      or from any other thread.</doc>
        <callback name="new_preroll">
          <return-value transfer-ownership="none">
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="new_sample">
        <doc xml:space="preserve">Called when a new sample is available.
      This callback is called from the streaming thread.
      The new sample can be retrieved with
      gst_app_sink_pull_sample() either from this callback
      or from any other thread.</doc>
        <callback name="new_sample">
          <return-value transfer-ownership="none">
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="new_event">
        <doc xml:space="preserve">Called when a new event is available.
      This callback is called from the streaming thread.
      The new event can be retrieved with
      gst_app_sink_pull_object() either from this callback
      or from any other thread.
      The callback should return %TRUE if the event has been handled,
      %FALSE otherwise.
      Since: 1.20</doc>
        <callback name="new_event">
          <return-value transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="propose_allocation">
        <doc xml:space="preserve">Called when the propose_allocation query is available.
      This callback is called from the streaming thread.
      Since: 1.24</doc>
        <callback name="propose_allocation">
          <return-value transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="query" transfer-ownership="none">
              <type name="Gst.Query" c:type="GstQuery*"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="2">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <record name="AppSinkClass" c:type="GstAppSinkClass" glib:is-gtype-struct-for="AppSink">
      <field name="basesink_class">
        <type name="GstBase.BaseSinkClass" c:type="GstBaseSinkClass"/>
      </field>
      <field name="eos">
        <callback name="eos">
          <return-value transfer-ownership="none">
            <type name="none" c:type="void"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="new_preroll">
        <callback name="new_preroll">
          <return-value transfer-ownership="none">
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="new_sample">
        <callback name="new_sample">
          <return-value transfer-ownership="none">
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="pull_preroll">
        <callback name="pull_preroll">
          <return-value transfer-ownership="full" nullable="1">
            <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS.
         Call gst_sample_unref() after usage.</doc>
            <type name="Gst.Sample" c:type="GstSample*"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="pull_sample">
        <callback name="pull_sample">
          <return-value transfer-ownership="full" nullable="1">
            <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS.
         Call gst_sample_unref() after usage.</doc>
            <type name="Gst.Sample" c:type="GstSample*"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="try_pull_preroll">
        <callback name="try_pull_preroll">
          <return-value transfer-ownership="full" nullable="1">
            <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS or the timeout expires.
         Call gst_sample_unref() after usage.</doc>
            <type name="Gst.Sample" c:type="GstSample*"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="timeout" transfer-ownership="none">
              <doc xml:space="preserve">the maximum amount of time to wait for the preroll sample</doc>
              <type name="Gst.ClockTime" c:type="GstClockTime"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="try_pull_sample">
        <callback name="try_pull_sample">
          <return-value transfer-ownership="full" nullable="1">
            <doc xml:space="preserve">a #GstSample or NULL when the appsink is stopped or EOS or the timeout expires.
         Call gst_sample_unref() after usage.</doc>
            <type name="Gst.Sample" c:type="GstSample*"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="timeout" transfer-ownership="none">
              <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
              <type name="Gst.ClockTime" c:type="GstClockTime"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="try_pull_object">
        <callback name="try_pull_object">
          <return-value transfer-ownership="full" nullable="1">
            <doc xml:space="preserve">a #GstSample, or #GstEvent or NULL when the appsink is stopped or EOS or the timeout expires.
Call gst_mini_object_unref() after usage.</doc>
            <type name="Gst.MiniObject" c:type="GstMiniObject*"/>
          </return-value>
          <parameters>
            <parameter name="appsink" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="timeout" transfer-ownership="none">
              <doc xml:space="preserve">the maximum amount of time to wait for a sample</doc>
              <type name="Gst.ClockTime" c:type="GstClockTime"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="1">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <callback name="AppSinkEosCallback" c:type="GstAppSinkEosCallback" version="1.28">
      <doc xml:space="preserve">Called when the end-of-stream has been reached. This callback
is called from the streaming thread.</doc>
      <return-value transfer-ownership="none">
        <type name="none" c:type="void"/>
      </return-value>
      <parameters>
        <parameter name="appsink" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSink</doc>
          <type name="AppSink" c:type="GstAppSink*"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <callback name="AppSinkNewEventCallback" c:type="GstAppSinkNewEventCallback" version="1.28">
      <doc xml:space="preserve">Called when a new event is available. This callback is called from the
streaming thread. The new event can be retrieved with
gst_app_sink_pull_object() either from this callback or from any other thread.

The callback should return %TRUE if the event has been handled, %FALSE
otherwise.</doc>
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">%TRUE when the event has been handled.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </return-value>
      <parameters>
        <parameter name="appsink" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSink</doc>
          <type name="AppSink" c:type="GstAppSink*"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <callback name="AppSinkNewPrerollCallback" c:type="GstAppSinkNewPrerollCallback" version="1.28">
      <doc xml:space="preserve">Called when a new preroll sample is available. This callback is called from
the streaming thread. The new preroll sample can be retrieved with
gst_app_sink_pull_preroll() either from this callback or from any other
thread.</doc>
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">%GST_FLOW_OK on success.</doc>
        <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
      </return-value>
      <parameters>
        <parameter name="appsink" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSink</doc>
          <type name="AppSink" c:type="GstAppSink*"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <callback name="AppSinkNewSampleCallback" c:type="GstAppSinkNewSampleCallback" version="1.28">
      <doc xml:space="preserve">Called when a new sample is available. This callback is called from the
streaming thread. The new sample can be retrieved with
gst_app_sink_pull_sample() either from this callback or from any other
thread.</doc>
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">%GST_FLOW_OK on success.</doc>
        <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
      </return-value>
      <parameters>
        <parameter name="appsink" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSink</doc>
          <type name="AppSink" c:type="GstAppSink*"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <record name="AppSinkPrivate" c:type="GstAppSinkPrivate" disguised="1" opaque="1"/>
    <callback name="AppSinkProposeAllocationCallback" c:type="GstAppSinkProposeAllocationCallback" version="1.28">
      <doc xml:space="preserve">Called when the propose_allocation query is available. This callback is
called from the streaming thread.</doc>
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">%TRUE when the query has been handled.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </return-value>
      <parameters>
        <parameter name="appsink" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSink</doc>
          <type name="AppSink" c:type="GstAppSink*"/>
        </parameter>
        <parameter name="query" transfer-ownership="none">
          <doc xml:space="preserve">An ALLOCATION query</doc>
          <type name="Gst.Query" c:type="GstQuery*"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <record name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks" opaque="1" version="1.28" glib:type-name="GstAppSinkSimpleCallbacks" glib:get-type="gst_app_sink_simple_callbacks_get_type" c:symbol-prefix="app_sink_simple_callbacks">
      <doc xml:space="preserve">A set of callbacks that can be installed on the appsink with
gst_app_sink_set_simple_callbacks().

Unlike GstAppSinkCallbacks this can also be used from bindings.</doc>
      <constructor name="new" c:identifier="gst_app_sink_simple_callbacks_new" version="1.28">
        <doc xml:space="preserve">Creates a new instance of callbacks.</doc>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve">New empty GstAppSinkSimpleCallbacks</doc>
          <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
        </return-value>
      </constructor>
      <method name="ref" c:identifier="gst_app_sink_simple_callbacks_ref" version="1.28">
        <doc xml:space="preserve">Increases the reference count of @cb.</doc>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve">the callbacks</doc>
          <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="set_eos" c:identifier="gst_app_sink_simple_callbacks_set_eos" version="1.28">
        <doc xml:space="preserve">Sets the EOS callback on @cb.

Once @cb is set on an #GstAppSink it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="eos_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">EOS callback</doc>
            <type name="AppSinkEosCallback" c:type="GstAppSinkEosCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_new_event" c:identifier="gst_app_sink_simple_callbacks_set_new_event" version="1.28">
        <doc xml:space="preserve">Sets the new event callback on @cb.

Once @cb is set on an #GstAppSink it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="new_event_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">new event callback</doc>
            <type name="AppSinkNewEventCallback" c:type="GstAppSinkNewEventCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_new_preroll" c:identifier="gst_app_sink_simple_callbacks_set_new_preroll" version="1.28">
        <doc xml:space="preserve">Sets the new preroll callback on @cb.

Once @cb is set on an #GstAppSink it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="new_preroll_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">new preroll callback</doc>
            <type name="AppSinkNewPrerollCallback" c:type="GstAppSinkNewPrerollCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_new_sample" c:identifier="gst_app_sink_simple_callbacks_set_new_sample" version="1.28">
        <doc xml:space="preserve">Sets the new sample callback on @cb.

Once @cb is set on an #GstAppSink it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="new_sample_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">new sample callback</doc>
            <type name="AppSinkNewSampleCallback" c:type="GstAppSinkNewSampleCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_propose_allocation" c:identifier="gst_app_sink_simple_callbacks_set_propose_allocation" version="1.28">
        <doc xml:space="preserve">Sets the new event callback on @cb.

Once @cb is set on an #GstAppSink it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="propose_allocation_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">propose allocation callback</doc>
            <type name="AppSinkProposeAllocationCallback" c:type="GstAppSinkProposeAllocationCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="unref" c:identifier="gst_app_sink_simple_callbacks_unref" version="1.28">
        <doc xml:space="preserve">Decreases the reference count of @cb and frees it after the
last reference is dropped.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSinkSimpleCallbacks" c:type="GstAppSinkSimpleCallbacks*"/>
          </instance-parameter>
        </parameters>
      </method>
    </record>
    <class name="AppSrc" c:symbol-prefix="app_src" c:type="GstAppSrc" parent="GstBase.BaseSrc" glib:type-name="GstAppSrc" glib:get-type="gst_app_src_get_type" glib:type-struct="AppSrcClass">
      <doc xml:space="preserve">The appsrc element can be used by applications to insert data into a
GStreamer pipeline. Unlike most GStreamer elements, appsrc provides
external API functions.

appsrc can be used by linking with the libgstapp library to access the
methods directly or by using the appsrc action signals.

Before operating appsrc, the caps property must be set to fixed caps
describing the format of the data that will be pushed with appsrc. An
exception to this is when pushing buffers with unknown caps, in which case no
caps should be set. This is typically true of file-like sources that push raw
byte buffers. If you don't want to explicitly set the caps, you can use
gst_app_src_push_sample. This method gets the caps associated with the
sample and sets them on the appsrc replacing any previously set caps (if
different from sample's caps).

The main way of handing data to the appsrc element is by calling the
gst_app_src_push_buffer() method or by emitting the push-buffer action signal.
This will put the buffer onto a queue from which appsrc will read from in its
streaming thread. It is important to note that data transport will not happen
from the thread that performed the push-buffer call.

The "max-bytes", "max-buffers" and "max-time" properties control how much
data can be queued in appsrc before appsrc considers the queue full. A
filled internal queue will always signal the "enough-data" signal, which
signals the application that it should stop pushing data into appsrc. The
"block" property will cause appsrc to block the push-buffer method until
free data becomes available again.

When the internal queue is running out of data, the "need-data" signal is
emitted, which signals the application that it should start pushing more data
into appsrc.

In addition to the "need-data" and "enough-data" signals, appsrc can emit the
"seek-data" signal when the "stream-mode" property is set to "seekable" or
"random-access". The signal argument will contain the new desired position in
the stream expressed in the unit set with the "format" property. After
receiving the seek-data signal, the application should push-buffers from the
new position.

These signals allow the application to operate the appsrc in two different
ways:

The push mode, in which the application repeatedly calls the push-buffer/push-sample
method with a new buffer/sample. Optionally, the queue size in the appsrc
can be controlled with the enough-data and need-data signals by respectively
stopping/starting the push-buffer/push-sample calls. This is a typical
mode of operation for the stream-type "stream" and "seekable". Use this
mode when implementing various network protocols or hardware devices.

The pull mode, in which the need-data signal triggers the next push-buffer call.
This mode is typically used in the "random-access" stream-type. Use this
mode for file access or other randomly accessible sources. In this mode, a
buffer of exactly the amount of bytes given by the need-data signal should be
pushed into appsrc.

In all modes, the size property on appsrc should contain the total stream
size in bytes. Setting this property is mandatory in the random-access mode.
For the stream and seekable modes, setting this property is optional but
recommended.

When the application has finished pushing data into appsrc, it should call
gst_app_src_end_of_stream() or emit the end-of-stream action signal. After
this call, no more buffers can be pushed into appsrc until a flushing seek
occurs or the state of the appsrc has gone through READY.</doc>
      <implements name="Gst.URIHandler"/>
      <virtual-method name="end_of_stream" invoker="end_of_stream">
        <doc xml:space="preserve">Indicates to the appsrc element that the last buffer queued in the
element is the last buffer of the stream.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the EOS was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="enough_data">
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="need_data">
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="length" transfer-ownership="none">
            <type name="guint" c:type="guint"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="push_buffer" invoker="push_buffer">
        <doc xml:space="preserve">Adds a buffer to the queue of buffers that the appsrc element will
push to its source pad.  This function takes ownership of the buffer.

When the block property is TRUE, this function can block until free
space becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the buffer was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer" transfer-ownership="full">
            <doc xml:space="preserve">a #GstBuffer to push</doc>
            <type name="Gst.Buffer" c:type="GstBuffer*"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="push_buffer_list" invoker="push_buffer_list" version="1.14">
        <doc xml:space="preserve">Adds a buffer list to the queue of buffers and buffer lists that the
appsrc element will push to its source pad.  This function takes ownership
of @buffer_list.

When the block property is TRUE, this function can block until free
space becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the buffer list was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer_list" transfer-ownership="full">
            <doc xml:space="preserve">a #GstBufferList to push</doc>
            <type name="Gst.BufferList" c:type="GstBufferList*"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="push_sample" invoker="push_sample" version="1.6">
        <doc xml:space="preserve">Extract a buffer from the provided sample and adds it to the queue of
buffers that the appsrc element will push to its source pad. Any
previous caps that were set on appsrc will be replaced by the caps
associated with the sample if not equal.

This function does not take ownership of the
sample so the sample needs to be unreffed after calling this function.

When the block property is TRUE, this function can block until free
space becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the buffer was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="sample" transfer-ownership="none">
            <doc xml:space="preserve">a #GstSample from which buffer and caps may be
extracted</doc>
            <type name="Gst.Sample" c:type="GstSample*"/>
          </parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="seek_data">
        <return-value transfer-ownership="none">
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="offset" transfer-ownership="none">
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </virtual-method>
      <method name="end_of_stream" c:identifier="gst_app_src_end_of_stream">
        <doc xml:space="preserve">Indicates to the appsrc element that the last buffer queued in the
element is the last buffer of the stream.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the EOS was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_caps" c:identifier="gst_app_src_get_caps" glib:get-property="caps">
        <doc xml:space="preserve">Get the configured caps on @appsrc.</doc>
        <return-value transfer-ownership="full" nullable="1">
          <doc xml:space="preserve">the #GstCaps produced by the source. gst_caps_unref() after usage.</doc>
          <type name="Gst.Caps" c:type="GstCaps*"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_current_level_buffers" c:identifier="gst_app_src_get_current_level_buffers" glib:get-property="current-level-buffers" version="1.20">
        <doc xml:space="preserve">Get the number of currently queued buffers inside @appsrc.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The number of currently queued buffers.</doc>
          <type name="guint64" c:type="guint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_current_level_bytes" c:identifier="gst_app_src_get_current_level_bytes" glib:get-property="current-level-bytes" version="1.2">
        <doc xml:space="preserve">Get the number of currently queued bytes inside @appsrc.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The number of currently queued bytes.</doc>
          <type name="guint64" c:type="guint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_current_level_time" c:identifier="gst_app_src_get_current_level_time" glib:get-property="current-level-time" version="1.20">
        <doc xml:space="preserve">Get the amount of currently queued time inside @appsrc.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The amount of currently queued time.</doc>
          <type name="Gst.ClockTime" c:type="GstClockTime"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_duration" c:identifier="gst_app_src_get_duration" glib:get-property="duration" version="1.10">
        <doc xml:space="preserve">Get the duration of the stream in nanoseconds. A value of GST_CLOCK_TIME_NONE means that the duration is
not known.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">the duration of the stream previously set with gst_app_src_set_duration();</doc>
          <type name="Gst.ClockTime" c:type="GstClockTime"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_emit_signals" c:identifier="gst_app_src_get_emit_signals" glib:get-property="emit-signals">
        <doc xml:space="preserve">Check if appsrc will emit the "new-preroll" and "new-buffer" signals.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if @appsrc is emitting the "new-preroll" and "new-buffer"
signals.</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_latency" c:identifier="gst_app_src_get_latency">
        <doc xml:space="preserve">Retrieve the min and max latencies in @min and @max respectively.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="min" direction="out" caller-allocates="0" transfer-ownership="full">
            <doc xml:space="preserve">the min latency</doc>
            <type name="guint64" c:type="guint64*"/>
          </parameter>
          <parameter name="max" direction="out" caller-allocates="0" transfer-ownership="full">
            <doc xml:space="preserve">the max latency</doc>
            <type name="guint64" c:type="guint64*"/>
          </parameter>
        </parameters>
      </method>
      <method name="get_leaky_type" c:identifier="gst_app_src_get_leaky_type" glib:get-property="leaky-type" version="1.20">
        <doc xml:space="preserve">Returns the currently set #GstAppLeakyType. See gst_app_src_set_leaky_type()
for more details.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The currently set #GstAppLeakyType.</doc>
          <type name="AppLeakyType" c:type="GstAppLeakyType"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_max_buffers" c:identifier="gst_app_src_get_max_buffers" glib:get-property="max-buffers" version="1.20">
        <doc xml:space="preserve">Get the maximum amount of buffers that can be queued in @appsrc.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The maximum amount of buffers that can be queued.</doc>
          <type name="guint64" c:type="guint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_max_bytes" c:identifier="gst_app_src_get_max_bytes" glib:get-property="max-bytes">
        <doc xml:space="preserve">Get the maximum amount of bytes that can be queued in @appsrc.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The maximum amount of bytes that can be queued.</doc>
          <type name="guint64" c:type="guint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_max_time" c:identifier="gst_app_src_get_max_time" glib:get-property="max-time" version="1.20">
        <doc xml:space="preserve">Get the maximum amount of time that can be queued in @appsrc.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">The maximum amount of time that can be queued.</doc>
          <type name="Gst.ClockTime" c:type="GstClockTime"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_size" c:identifier="gst_app_src_get_size" glib:get-property="size">
        <doc xml:space="preserve">Get the size of the stream in bytes. A value of -1 means that the size is
not known.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">the size of the stream previously set with gst_app_src_set_size();</doc>
          <type name="gint64" c:type="gint64"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_stream_type" c:identifier="gst_app_src_get_stream_type" glib:get-property="stream-type">
        <doc xml:space="preserve">Get the stream type. Control the stream type of @appsrc
with gst_app_src_set_stream_type().</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">the stream type.</doc>
          <type name="AppStreamType" c:type="GstAppStreamType"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="push_buffer" c:identifier="gst_app_src_push_buffer">
        <doc xml:space="preserve">Adds a buffer to the queue of buffers that the appsrc element will
push to its source pad.  This function takes ownership of the buffer.

When the block property is TRUE, this function can block until free
space becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the buffer was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer" transfer-ownership="full">
            <doc xml:space="preserve">a #GstBuffer to push</doc>
            <type name="Gst.Buffer" c:type="GstBuffer*"/>
          </parameter>
        </parameters>
      </method>
      <method name="push_buffer_list" c:identifier="gst_app_src_push_buffer_list" version="1.14">
        <doc xml:space="preserve">Adds a buffer list to the queue of buffers and buffer lists that the
appsrc element will push to its source pad.  This function takes ownership
of @buffer_list.

When the block property is TRUE, this function can block until free
space becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the buffer list was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer_list" transfer-ownership="full">
            <doc xml:space="preserve">a #GstBufferList to push</doc>
            <type name="Gst.BufferList" c:type="GstBufferList*"/>
          </parameter>
        </parameters>
      </method>
      <method name="push_sample" c:identifier="gst_app_src_push_sample" version="1.6">
        <doc xml:space="preserve">Extract a buffer from the provided sample and adds it to the queue of
buffers that the appsrc element will push to its source pad. Any
previous caps that were set on appsrc will be replaced by the caps
associated with the sample if not equal.

This function does not take ownership of the
sample so the sample needs to be unreffed after calling this function.

When the block property is TRUE, this function can block until free
space becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">#GST_FLOW_OK when the buffer was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="sample" transfer-ownership="none">
            <doc xml:space="preserve">a #GstSample from which buffer and caps may be
extracted</doc>
            <type name="Gst.Sample" c:type="GstSample*"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_callbacks" c:identifier="gst_app_src_set_callbacks" introspectable="0">
        <doc xml:space="preserve">Set callbacks which will be executed when data is needed, enough data has
been collected or when a seek should be performed.
This is an alternative to using the signals, it has lower overhead and is thus
less expensive, but also less flexible.

If callbacks are installed, no signals will be emitted for performance
reasons.

Before 1.16.3 it was not possible to change the callbacks in a thread-safe
way.

Since 1.28.3 it is allowed to set the @callbacks to %NULL to unset them.

Note that gst_app_src_set_callbacks() and
gst_app_src_set_simple_callbacks() are mutually exclusive and setting one
will unset the other.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="callbacks" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSrcCallbacks" c:type="GstAppSrcCallbacks*"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">a user_data argument for the callbacks</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">a destroy notify function</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_caps" c:identifier="gst_app_src_set_caps" glib:set-property="caps">
        <doc xml:space="preserve">Set the capabilities on the appsrc element.  This function takes
a copy of the caps structure. After calling this method, the source will
only produce caps that match @caps. @caps must be fixed and the caps on the
buffers must match the caps or left NULL.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">caps to set</doc>
            <type name="Gst.Caps" c:type="const GstCaps*"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_duration" c:identifier="gst_app_src_set_duration" glib:set-property="duration" version="1.10">
        <doc xml:space="preserve">Set the duration of the stream in nanoseconds. A value of GST_CLOCK_TIME_NONE means that the duration is
not known.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="duration" transfer-ownership="none">
            <doc xml:space="preserve">the duration to set</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_emit_signals" c:identifier="gst_app_src_set_emit_signals" glib:set-property="emit-signals">
        <doc xml:space="preserve">Make appsrc emit the "new-preroll" and "new-buffer" signals. This option is
by default disabled because signal emission is expensive and unneeded when
the application prefers to operate in pull mode.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="emit" transfer-ownership="none">
            <doc xml:space="preserve">the new state</doc>
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_latency" c:identifier="gst_app_src_set_latency">
        <doc xml:space="preserve">Configure the @min and @max latency in @src. If @min is set to -1, the
default latency calculations for pseudo-live sources will be used.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="min" transfer-ownership="none">
            <doc xml:space="preserve">the min latency</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve">the max latency</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_leaky_type" c:identifier="gst_app_src_set_leaky_type" glib:set-property="leaky-type" version="1.20">
        <doc xml:space="preserve">When set to any other value than GST_APP_LEAKY_TYPE_NONE then the appsrc
will drop any buffers that are pushed into it once its internal queue is
full. The selected type defines whether to drop the oldest or new
buffers.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="leaky" transfer-ownership="none">
            <doc xml:space="preserve">the #GstAppLeakyType</doc>
            <type name="AppLeakyType" c:type="GstAppLeakyType"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_buffers" c:identifier="gst_app_src_set_max_buffers" glib:set-property="max-buffers" version="1.20">
        <doc xml:space="preserve">Set the maximum amount of buffers that can be queued in @appsrc.
After the maximum amount of buffers are queued, @appsrc will emit the
"enough-data" signal.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve">the maximum number of buffers to queue</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_bytes" c:identifier="gst_app_src_set_max_bytes" glib:set-property="max-bytes">
        <doc xml:space="preserve">Set the maximum amount of bytes that can be queued in @appsrc.
After the maximum amount of bytes are queued, @appsrc will emit the
"enough-data" signal.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve">the maximum number of bytes to queue</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_time" c:identifier="gst_app_src_set_max_time" glib:set-property="max-time" version="1.20">
        <doc xml:space="preserve">Set the maximum amount of time that can be queued in @appsrc.
After the maximum amount of time are queued, @appsrc will emit the
"enough-data" signal.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve">the maximum amonut of time to queue</doc>
            <type name="Gst.ClockTime" c:type="GstClockTime"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_simple_callbacks" c:identifier="gst_app_src_set_simple_callbacks" version="1.28">
        <doc xml:space="preserve">Set callbacks which will be executed when data is needed, enough data has
been collected or when a seek should be performed.
This is an alternative to using the signals, it has lower overhead and is thus
less expensive, but also less flexible.

If callbacks are installed, no signals will be emitted for performance
reasons.

Once @cb is set on an #GstAppSrc it is not possible anymore to change any of
the callbacks inside it.

Note that gst_app_src_set_callbacks() and
gst_app_src_set_simple_callbacks() are mutually exclusive and setting one
will unset the other.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="cb" transfer-ownership="full" nullable="1" allow-none="1">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_size" c:identifier="gst_app_src_set_size" glib:set-property="size">
        <doc xml:space="preserve">Set the size of the stream in bytes. A value of -1 means that the size is
not known.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="size" transfer-ownership="none">
            <doc xml:space="preserve">the size to set</doc>
            <type name="gint64" c:type="gint64"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_stream_type" c:identifier="gst_app_src_set_stream_type" glib:set-property="stream-type">
        <doc xml:space="preserve">Set the stream type on @appsrc. For seekable streams, the "seek" signal must
be connected to.

A stream_type stream</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="type" transfer-ownership="none">
            <doc xml:space="preserve">the new state</doc>
            <type name="AppStreamType" c:type="GstAppStreamType"/>
          </parameter>
        </parameters>
      </method>
      <property name="block" writable="1" transfer-ownership="none" default-value="FALSE">
        <doc xml:space="preserve">When max-bytes are queued and after the enough-data signal has been emitted,
block any further push-buffer calls until the amount of queued bytes drops
below the max-bytes limit.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="caps" writable="1" transfer-ownership="none" setter="set_caps" getter="get_caps">
        <doc xml:space="preserve">The GstCaps that will negotiated downstream and will be put
on outgoing buffers.</doc>
        <type name="Gst.Caps"/>
      </property>
      <property name="current-level-buffers" version="1.20" transfer-ownership="none" getter="get_current_level_buffers" default-value="0">
        <doc xml:space="preserve">The number of currently queued buffers inside appsrc.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="current-level-bytes" version="1.2" transfer-ownership="none" getter="get_current_level_bytes" default-value="0">
        <doc xml:space="preserve">The number of currently queued bytes inside appsrc.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="current-level-time" version="1.20" transfer-ownership="none" getter="get_current_level_time" default-value="0">
        <doc xml:space="preserve">The amount of currently queued time inside appsrc.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="dropped" version="1.28" transfer-ownership="none" default-value="0">
        <doc xml:space="preserve">Number of buffers that were dropped.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="duration" version="1.10" writable="1" transfer-ownership="none" setter="set_duration" getter="get_duration" default-value="18446744073709551615">
        <doc xml:space="preserve">The total duration in nanoseconds of the data stream. If the total duration is known, it
is recommended to configure it with this property.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="emit-signals" writable="1" transfer-ownership="none" setter="set_emit_signals" getter="get_emit_signals" default-value="TRUE">
        <doc xml:space="preserve">Make appsrc emit the "need-data", "enough-data" and "seek-data" signals.
This option is by default enabled for backwards compatibility reasons but
can disabled when needed because signal emission is expensive.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="format" writable="1" transfer-ownership="none" default-value="GST_FORMAT_BYTES">
        <doc xml:space="preserve">The format to use for segment events. When the source is producing
timestamped buffers this property should be set to GST_FORMAT_TIME.</doc>
        <type name="Gst.Format"/>
      </property>
      <property name="handle-segment-change" version="1.18" writable="1" transfer-ownership="none" default-value="FALSE">
        <doc xml:space="preserve">When enabled, appsrc will check GstSegment in GstSample which was
pushed via gst_app_src_push_sample() or "push-sample" signal action.
If a GstSegment is changed, corresponding segment event will be followed
by next data flow.

FIXME: currently only GST_FORMAT_TIME format is supported and therefore
GstAppSrc::format should be time. However, possibly #GstAppSrc can support
other formats.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="in" version="1.28" transfer-ownership="none" default-value="0">
        <doc xml:space="preserve">Number of input buffers that were queued.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="is-live" writable="1" transfer-ownership="none" default-value="FALSE">
        <doc xml:space="preserve">Instruct the source to behave like a live source. This includes that it
will only push out buffers in the PLAYING state.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="leaky-type" version="1.20" writable="1" transfer-ownership="none" setter="set_leaky_type" getter="get_leaky_type" default-value="GST_APP_LEAKY_TYPE_NONE">
        <doc xml:space="preserve">When set to any other value than GST_APP_LEAKY_TYPE_NONE then the appsrc
will drop any buffers that are pushed into it once its internal queue is
full. The selected type defines whether to drop the oldest or new
buffers.</doc>
        <type name="AppLeakyType"/>
      </property>
      <property name="max-buffers" version="1.20" writable="1" transfer-ownership="none" setter="set_max_buffers" getter="get_max_buffers" default-value="0">
        <doc xml:space="preserve">The maximum amount of buffers that can be queued internally.
After the maximum amount of buffers are queued, appsrc will emit the
"enough-data" signal.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="max-bytes" writable="1" transfer-ownership="none" setter="set_max_bytes" getter="get_max_bytes" default-value="200000">
        <doc xml:space="preserve">The maximum amount of bytes that can be queued internally.
After the maximum amount of bytes are queued, appsrc will emit the
"enough-data" signal.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="max-latency" writable="1" transfer-ownership="none" default-value="-1">
        <type name="gint64" c:type="gint64"/>
      </property>
      <property name="max-time" version="1.20" writable="1" transfer-ownership="none" setter="set_max_time" getter="get_max_time" default-value="0">
        <doc xml:space="preserve">The maximum amount of time that can be queued internally.
After the maximum amount of time are queued, appsrc will emit the
"enough-data" signal.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="min-latency" writable="1" transfer-ownership="none" default-value="-1">
        <doc xml:space="preserve">The minimum latency of the source. A value of -1 will use the default
latency calculations of #GstBaseSrc.</doc>
        <type name="gint64" c:type="gint64"/>
      </property>
      <property name="min-percent" writable="1" transfer-ownership="none" default-value="0">
        <doc xml:space="preserve">Make appsrc emit the "need-data" signal when the amount of bytes in the
queue drops below this percentage of max-bytes.</doc>
        <type name="guint" c:type="guint"/>
      </property>
      <property name="out" version="1.28" transfer-ownership="none" default-value="0">
        <doc xml:space="preserve">Number of output buffers that were dequeued.</doc>
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="silent" version="1.28" writable="1" transfer-ownership="none" default-value="TRUE">
        <doc xml:space="preserve">Don't emit notify for input, output and dropped buffers.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="size" writable="1" transfer-ownership="none" setter="set_size" getter="get_size" default-value="-1">
        <doc xml:space="preserve">The total size in bytes of the data stream. If the total size is known, it
is recommended to configure it with this property.</doc>
        <type name="gint64" c:type="gint64"/>
      </property>
      <property name="stream-type" writable="1" transfer-ownership="none" setter="set_stream_type" getter="get_stream_type" default-value="GST_APP_STREAM_TYPE_STREAM">
        <doc xml:space="preserve">The type of stream that this source is producing.  For seekable streams the
application should connect to the seek-data signal.</doc>
        <type name="AppStreamType"/>
      </property>
      <field name="basesrc">
        <type name="GstBase.BaseSrc" c:type="GstBaseSrc"/>
      </field>
      <field name="priv" readable="0" private="1">
        <type name="AppSrcPrivate" c:type="GstAppSrcPrivate*"/>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
      <glib:signal name="end-of-stream" when="last" action="1">
        <doc xml:space="preserve">Notify @appsrc that no more buffer are available.</doc>
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn"/>
        </return-value>
      </glib:signal>
      <glib:signal name="enough-data" when="last">
        <doc xml:space="preserve">Signal that the source has enough data. It is recommended that the
application stops calling push-buffer until the need-data signal is
emitted again to avoid excessive buffer queueing.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
      </glib:signal>
      <glib:signal name="need-data" when="last">
        <doc xml:space="preserve">Signal that the source needs more data. In the callback or from another
thread you should call push-buffer or end-of-stream.

@length is just a hint and when it is set to -1, any number of bytes can be
pushed into @appsrc.

You can call push-buffer multiple times until the enough-data signal is
fired.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <parameter name="length" transfer-ownership="none">
            <doc xml:space="preserve">the amount of bytes needed.</doc>
            <type name="guint" c:type="guint"/>
          </parameter>
        </parameters>
      </glib:signal>
      <glib:signal name="push-buffer" when="last" action="1">
        <doc xml:space="preserve">Adds a buffer to the queue of buffers that the appsrc element will
push to its source pad.

This function does not take ownership of the buffer, but it takes a
reference so the buffer can be unreffed at any time after calling this
function.

When the block property is TRUE, this function can block until free space
becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn"/>
        </return-value>
        <parameters>
          <parameter name="buffer" transfer-ownership="none">
            <doc xml:space="preserve">a buffer to push</doc>
            <type name="Gst.Buffer"/>
          </parameter>
        </parameters>
      </glib:signal>
      <glib:signal name="push-buffer-list" when="last" action="1" version="1.14">
        <doc xml:space="preserve">Adds a buffer list to the queue of buffers and buffer lists that the
appsrc element will push to its source pad.

This function does not take ownership of the buffer list, but it takes a
reference so the buffer list can be unreffed at any time after calling
this function.

When the block property is TRUE, this function can block until free space
becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn"/>
        </return-value>
        <parameters>
          <parameter name="buffer_list" transfer-ownership="none">
            <doc xml:space="preserve">a buffer list to push</doc>
            <type name="Gst.BufferList"/>
          </parameter>
        </parameters>
      </glib:signal>
      <glib:signal name="push-sample" when="last" action="1" version="1.6">
        <doc xml:space="preserve">Extract a buffer from the provided sample and adds the extracted buffer
to the queue of buffers that the appsrc element will
push to its source pad. This function set the appsrc caps based on the caps
in the sample and reset the caps if they change.
Only the caps and the buffer of the provided sample are used and not
for example the segment in the sample.

This function does not take ownership of the sample, but it takes a
reference so the sample can be unreffed at any time after calling this
function.

When the block property is TRUE, this function can block until free space
becomes available in the queue.</doc>
        <return-value transfer-ownership="none">
          <type name="Gst.FlowReturn"/>
        </return-value>
        <parameters>
          <parameter name="sample" transfer-ownership="none">
            <doc xml:space="preserve">a sample from which extract buffer to push</doc>
            <type name="Gst.Sample"/>
          </parameter>
        </parameters>
      </glib:signal>
      <glib:signal name="seek-data" when="last">
        <doc xml:space="preserve">Seek to the given offset. The next push-buffer should produce buffers from
the new @offset.
This callback is only called for seekable stream types.</doc>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve">%TRUE if the seek succeeded.</doc>
          <type name="gboolean" c:type="gboolean"/>
        </return-value>
        <parameters>
          <parameter name="offset" transfer-ownership="none">
            <doc xml:space="preserve">the offset to seek to</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </glib:signal>
    </class>
    <record name="AppSrcCallbacks" c:type="GstAppSrcCallbacks" introspectable="0">
      <doc xml:space="preserve">A set of callbacks that can be installed on the appsrc with
gst_app_src_set_callbacks().</doc>
      <field name="need_data">
        <doc xml:space="preserve">Called when the appsrc needs more data. A buffer or EOS should be
   pushed to appsrc from this thread or another thread. @length is just a hint
   and when it is set to -1, any number of bytes can be pushed into @appsrc.</doc>
        <callback name="need_data">
          <return-value transfer-ownership="none">
            <type name="none" c:type="void"/>
          </return-value>
          <parameters>
            <parameter name="src" transfer-ownership="none">
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="length" transfer-ownership="none">
              <type name="guint" c:type="guint"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="enough_data">
        <doc xml:space="preserve">Called when appsrc has enough data. It is recommended that the
   application stops calling push-buffer until the need_data callback is
   emitted again to avoid excessive buffer queueing.</doc>
        <callback name="enough_data">
          <return-value transfer-ownership="none">
            <type name="none" c:type="void"/>
          </return-value>
          <parameters>
            <parameter name="src" transfer-ownership="none">
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="seek_data">
        <doc xml:space="preserve">Called when a seek should be performed to the offset.
   The next push-buffer should produce buffers from the new @offset.
   This callback is only called for seekable stream types.</doc>
        <callback name="seek_data">
          <return-value transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </return-value>
          <parameters>
            <parameter name="src" transfer-ownership="none">
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="offset" transfer-ownership="none">
              <type name="guint64" c:type="guint64"/>
            </parameter>
            <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
              <type name="gpointer" c:type="gpointer"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <record name="AppSrcClass" c:type="GstAppSrcClass" glib:is-gtype-struct-for="AppSrc">
      <field name="basesrc_class">
        <type name="GstBase.BaseSrcClass" c:type="GstBaseSrcClass"/>
      </field>
      <field name="need_data">
        <callback name="need_data">
          <return-value transfer-ownership="none">
            <type name="none" c:type="void"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="length" transfer-ownership="none">
              <type name="guint" c:type="guint"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="enough_data">
        <callback name="enough_data">
          <return-value transfer-ownership="none">
            <type name="none" c:type="void"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="seek_data">
        <callback name="seek_data">
          <return-value transfer-ownership="none">
            <type name="gboolean" c:type="gboolean"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="offset" transfer-ownership="none">
              <type name="guint64" c:type="guint64"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="push_buffer">
        <callback name="push_buffer">
          <return-value transfer-ownership="none">
            <doc xml:space="preserve">#GST_FLOW_OK when the buffer was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="buffer" transfer-ownership="full">
              <doc xml:space="preserve">a #GstBuffer to push</doc>
              <type name="Gst.Buffer" c:type="GstBuffer*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="end_of_stream">
        <callback name="end_of_stream">
          <return-value transfer-ownership="none">
            <doc xml:space="preserve">#GST_FLOW_OK when the EOS was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.</doc>
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="push_sample">
        <callback name="push_sample">
          <return-value transfer-ownership="none">
            <doc xml:space="preserve">#GST_FLOW_OK when the buffer was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="sample" transfer-ownership="none">
              <doc xml:space="preserve">a #GstSample from which buffer and caps may be
extracted</doc>
              <type name="Gst.Sample" c:type="GstSample*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="push_buffer_list">
        <callback name="push_buffer_list">
          <return-value transfer-ownership="none">
            <doc xml:space="preserve">#GST_FLOW_OK when the buffer list was successfully queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occurred.</doc>
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <doc xml:space="preserve">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="buffer_list" transfer-ownership="full">
              <doc xml:space="preserve">a #GstBufferList to push</doc>
              <type name="Gst.BufferList" c:type="GstBufferList*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="2">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <callback name="AppSrcEnoughDataCallback" c:type="GstAppSrcEnoughDataCallback" version="1.28">
      <doc xml:space="preserve">Called when appsrc has enough data. It is recommended that the application
stops calling push-buffer until the need_data callback is emitted again to
avoid excessive buffer queueing.</doc>
      <return-value transfer-ownership="none">
        <type name="none" c:type="void"/>
      </return-value>
      <parameters>
        <parameter name="appsrc" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSrc</doc>
          <type name="AppSrc" c:type="GstAppSrc*"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <callback name="AppSrcNeedDataCallback" c:type="GstAppSrcNeedDataCallback" version="1.28">
      <doc xml:space="preserve">Called when the appsrc needs more data. A buffer or EOS should be pushed to
appsrc from this thread or another thread. @length is just a hint and when it
is set to -1, any number of bytes can be pushed into @appsrc.</doc>
      <return-value transfer-ownership="none">
        <type name="none" c:type="void"/>
      </return-value>
      <parameters>
        <parameter name="appsrc" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSrc</doc>
          <type name="AppSrc" c:type="GstAppSrc*"/>
        </parameter>
        <parameter name="length" transfer-ownership="none">
          <doc xml:space="preserve">Length hint</doc>
          <type name="guint" c:type="guint"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <record name="AppSrcPrivate" c:type="GstAppSrcPrivate" disguised="1" opaque="1"/>
    <callback name="AppSrcSeekDataCallback" c:type="GstAppSrcSeekDataCallback" version="1.28">
      <doc xml:space="preserve">Called when a seek should be performed to the offset. The next push-buffer
should produce buffers from the new @offset. This callback is only called for
seekable stream types.</doc>
      <return-value transfer-ownership="none">
        <doc xml:space="preserve">%TRUE if the seek was successful.</doc>
        <type name="gboolean" c:type="gboolean"/>
      </return-value>
      <parameters>
        <parameter name="appsrc" transfer-ownership="none">
          <doc xml:space="preserve">a #GstAppSrc</doc>
          <type name="AppSrc" c:type="GstAppSrc*"/>
        </parameter>
        <parameter name="offset" transfer-ownership="none">
          <doc xml:space="preserve">Offset to seek to.</doc>
          <type name="guint64" c:type="guint64"/>
        </parameter>
        <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
          <doc xml:space="preserve">callback user data</doc>
          <type name="gpointer" c:type="gpointer"/>
        </parameter>
      </parameters>
    </callback>
    <record name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks" opaque="1" version="1.28" glib:type-name="GstAppSrcSimpleCallbacks" glib:get-type="gst_app_src_simple_callbacks_get_type" c:symbol-prefix="app_src_simple_callbacks">
      <doc xml:space="preserve">A set of callbacks that can be installed on the appsink with
gst_app_sink_set_simple_callbacks().

Unlike GstAppSrcCallbacks this can also be used from bindings.</doc>
      <constructor name="new" c:identifier="gst_app_src_simple_callbacks_new" version="1.28">
        <doc xml:space="preserve">Creates a new instance of callbacks.</doc>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve">New empty GstAppSrcSimpleCallbacks</doc>
          <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
        </return-value>
      </constructor>
      <method name="ref" c:identifier="gst_app_src_simple_callbacks_ref" version="1.28">
        <doc xml:space="preserve">Increases the reference count of @cb.</doc>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve">the callbacks</doc>
          <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="set_enough_data" c:identifier="gst_app_src_simple_callbacks_set_enough_data" version="1.28">
        <doc xml:space="preserve">Sets the enough data callback on @cb.

Once @cb is set on an #GstAppSrc it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="enough_data_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">EOS callback</doc>
            <type name="AppSrcEnoughDataCallback" c:type="GstAppSrcEnoughDataCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_need_data" c:identifier="gst_app_src_simple_callbacks_set_need_data" version="1.28">
        <doc xml:space="preserve">Sets the need data callback on @cb.

Once @cb is set on an #GstAppSrc it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="need_data_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">EOS callback</doc>
            <type name="AppSrcNeedDataCallback" c:type="GstAppSrcNeedDataCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_seek_data" c:identifier="gst_app_src_simple_callbacks_set_seek_data" version="1.28">
        <doc xml:space="preserve">Sets the seek data callback on @cb.

Once @cb is set on an #GstAppSrc it is not possible anymore to change any of
the callbacks inside it.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
          </instance-parameter>
          <parameter name="seek_data_cb" transfer-ownership="none" scope="notified" closure="1" destroy="2">
            <doc xml:space="preserve">EOS callback</doc>
            <type name="AppSrcSeekDataCallback" c:type="GstAppSrcSeekDataCallback"/>
          </parameter>
          <parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
            <doc xml:space="preserve">the user data</doc>
            <type name="gpointer" c:type="gpointer"/>
          </parameter>
          <parameter name="destroy_notify" transfer-ownership="none" scope="async">
            <doc xml:space="preserve">#GDestroyNotify to free the user data</doc>
            <type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
          </parameter>
        </parameters>
      </method>
      <method name="unref" c:identifier="gst_app_src_simple_callbacks_unref" version="1.28">
        <doc xml:space="preserve">Decreases the reference count of @cb and frees it after the
last reference is dropped.</doc>
        <return-value transfer-ownership="none">
          <type name="none" c:type="void"/>
        </return-value>
        <parameters>
          <instance-parameter name="cb" transfer-ownership="none">
            <doc xml:space="preserve">the callbacks</doc>
            <type name="AppSrcSimpleCallbacks" c:type="GstAppSrcSimpleCallbacks*"/>
          </instance-parameter>
        </parameters>
      </method>
    </record>
    <enumeration name="AppStreamType" glib:type-name="GstAppStreamType" glib:get-type="gst_app_stream_type_get_type" c:type="GstAppStreamType">
      <doc xml:space="preserve">The stream type.</doc>
      <member name="stream" value="0" c:identifier="GST_APP_STREAM_TYPE_STREAM" glib:nick="stream" glib:name="GST_APP_STREAM_TYPE_STREAM">
        <doc xml:space="preserve">No seeking is supported in the stream, such as a
live stream.</doc>
      </member>
      <member name="seekable" value="1" c:identifier="GST_APP_STREAM_TYPE_SEEKABLE" glib:nick="seekable" glib:name="GST_APP_STREAM_TYPE_SEEKABLE">
        <doc xml:space="preserve">The stream is seekable but seeking might not
be very fast, such as data from a webserver.</doc>
      </member>
      <member name="random_access" value="2" c:identifier="GST_APP_STREAM_TYPE_RANDOM_ACCESS" glib:nick="random-access" glib:name="GST_APP_STREAM_TYPE_RANDOM_ACCESS">
        <doc xml:space="preserve">The stream is seekable and seeking is fast,
such as in a local file.</doc>
      </member>
    </enumeration>
    <function-macro name="IS_APP_SINK" c:identifier="GST_IS_APP_SINK" introspectable="0">
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_APP_SINK_CLASS" c:identifier="GST_IS_APP_SINK_CLASS" introspectable="0">
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_APP_SRC" c:identifier="GST_IS_APP_SRC" introspectable="0">
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_APP_SRC_CLASS" c:identifier="GST_IS_APP_SRC_CLASS" introspectable="0">
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
  </namespace>
</repository>