gstreamer-rs/gir-files/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 version="1.2"
            xmlns="http://www.gtk.org/introspection/core/1.0"
            xmlns:c="http://www.gtk.org/introspection/c/1.0"
            xmlns:glib="http://www.gtk.org/introspection/glib/1.0">
  <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"/>
  <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_SINK"
                    c:identifier="GST_APP_SINK"
                    introspectable="0">
      <source-position filename="gstappsink.h" line="30"/>
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SINK_CAST"
                    c:identifier="GST_APP_SINK_CAST"
                    introspectable="0">
      <source-position filename="gstappsink.h" line="38"/>
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SINK_CLASS"
                    c:identifier="GST_APP_SINK_CLASS"
                    introspectable="0">
      <source-position filename="gstappsink.h" line="32"/>
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SRC"
                    c:identifier="GST_APP_SRC"
                    introspectable="0">
      <source-position filename="gstappsrc.h" line="31"/>
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SRC_CAST"
                    c:identifier="GST_APP_SRC_CAST"
                    introspectable="0">
      <source-position filename="gstappsrc.h" line="39"/>
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="APP_SRC_CLASS"
                    c:identifier="GST_APP_SRC_CLASS"
                    introspectable="0">
      <source-position filename="gstappsrc.h" line="33"/>
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <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"
           filename="gstappsink.c"
           line="20">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" property can be
used to limit the queue size. The "drop" 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>
      <source-position filename="gstappsink.h" line="103"/>
      <implements name="Gst.URIHandler"/>
      <virtual-method name="eos">
        <source-position filename="gstappsink.h" line="91"/>
        <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">
        <source-position filename="gstappsink.h" line="92"/>
        <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">
        <source-position filename="gstappsink.h" line="93"/>
        <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"
             filename="gstappsink.c"
             line="1438">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>
        <source-position filename="gstappsink.h" line="96"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1461">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"
                 filename="gstappsink.c"
                 line="1440">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"
             filename="gstappsink.c"
             line="1470">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>
        <source-position filename="gstappsink.h" line="97"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1486">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"
                 filename="gstappsink.c"
                 line="1472">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="try_pull_preroll"
                      invoker="try_pull_preroll"
                      version="1.10">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1495">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>
        <source-position filename="gstappsink.h" line="98"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1520">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"
                 filename="gstappsink.c"
                 line="1497">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1498">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"
             filename="gstappsink.c"
             line="1598">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>
        <source-position filename="gstappsink.h" line="99"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1616">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"
                 filename="gstappsink.c"
                 line="1600">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1601">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"
             filename="gstappsink.c"
             line="1358">Check if @appsink supports buffer lists.</doc>
        <source-position filename="gstappsink.h" line="139"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1364">%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"
                 filename="gstappsink.c"
                 line="1360">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_caps" c:identifier="gst_app_sink_get_caps">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1103">Get the configured caps on @appsink.</doc>
        <source-position filename="gstappsink.h" line="112"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1109">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"
                 filename="gstappsink.c"
                 line="1105">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_drop" c:identifier="gst_app_sink_get_drop">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1302">Check if @appsink will drop old buffers when the maximum amount of queued
buffers is reached.</doc>
        <source-position filename="gstappsink.h" line="133"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1309">%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"
                 filename="gstappsink.c"
                 line="1304">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">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1198">Check if appsink will emit the "new-preroll" and "new-sample" signals.</doc>
        <source-position filename="gstappsink.h" line="121"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1204">%TRUE if @appsink is emiting 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"
                 filename="gstappsink.c"
                 line="1200">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">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1251">Get the maximum amount of buffers that can be queued in @appsink.</doc>
        <source-position filename="gstappsink.h" line="127"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1257">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"
                 filename="gstappsink.c"
                 line="1253">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">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1411">Check if @appsink will wait for all buffers to be consumed when an EOS is
received.</doc>
        <source-position filename="gstappsink.h" line="145"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1418">%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"
                 filename="gstappsink.c"
                 line="1413">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="is_eos" c:identifier="gst_app_sink_is_eos">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1130">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>
        <source-position filename="gstappsink.h" line="115"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1140">%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"
                 filename="gstappsink.c"
                 line="1132">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"
             filename="gstappsink.c"
             line="1438">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>
        <source-position filename="gstappsink.h" line="148"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1461">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"
                 filename="gstappsink.c"
                 line="1440">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"
             filename="gstappsink.c"
             line="1470">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>
        <source-position filename="gstappsink.h" line="151"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1486">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"
                 filename="gstappsink.c"
                 line="1472">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"
             filename="gstappsink.c"
             line="1329">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>
        <source-position filename="gstappsink.h" line="136"/>
        <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"
                 filename="gstappsink.c"
                 line="1331">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="enable_lists" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1332">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"
             filename="gstappsink.c"
             line="1711">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.</doc>
        <source-position filename="gstappsink.h" line="160"/>
        <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"
                 filename="gstappsink.c"
                 line="1713">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="callbacks" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1714">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"
                 filename="gstappsink.c"
                 line="1715">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"
                 filename="gstappsink.c"
                 line="1716">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">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1070">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>
        <source-position filename="gstappsink.h" line="109"/>
        <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"
                 filename="gstappsink.c"
                 line="1072">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="caps" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1073">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">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1276">Instruct @appsink to drop old buffers when the maximum amount of queued
buffers is reached.</doc>
        <source-position filename="gstappsink.h" line="130"/>
        <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"
                 filename="gstappsink.c"
                 line="1278">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="drop" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1279">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">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1175">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>
        <source-position filename="gstappsink.h" line="118"/>
        <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"
                 filename="gstappsink.c"
                 line="1177">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="emit" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1178">the new state</doc>
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_buffers"
              c:identifier="gst_app_sink_set_max_buffers">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1224">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.</doc>
        <source-position filename="gstappsink.h" line="124"/>
        <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"
                 filename="gstappsink.c"
                 line="1226">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1227">the maximum number of buffers to queue</doc>
            <type name="guint" c:type="guint"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_wait_on_eos"
              c:identifier="gst_app_sink_set_wait_on_eos">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1385">Instruct @appsink to wait for all buffers to be consumed when an EOS is received.</doc>
        <source-position filename="gstappsink.h" line="142"/>
        <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"
                 filename="gstappsink.c"
                 line="1387">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="wait" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1388">the new state</doc>
            <type name="gboolean" c:type="gboolean"/>
          </parameter>
        </parameters>
      </method>
      <method name="try_pull_preroll"
              c:identifier="gst_app_sink_try_pull_preroll"
              version="1.10">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="1495">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>
        <source-position filename="gstappsink.h" line="154"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1520">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"
                 filename="gstappsink.c"
                 line="1497">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1498">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"
             filename="gstappsink.c"
             line="1598">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>
        <source-position filename="gstappsink.h" line="157"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="1616">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"
                 filename="gstappsink.c"
                 line="1600">a #GstAppSink</doc>
            <type name="AppSink" c:type="GstAppSink*"/>
          </instance-parameter>
          <parameter name="timeout" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1601">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">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="caps" writable="1" transfer-ownership="none">
        <type name="Gst.Caps"/>
      </property>
      <property name="drop" writable="1" transfer-ownership="none">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="emit-signals" writable="1" transfer-ownership="none">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="eos" transfer-ownership="none">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="max-buffers" writable="1" transfer-ownership="none">
        <type name="guint" c:type="guint"/>
      </property>
      <property name="wait-on-eos" writable="1" transfer-ownership="none">
        <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"
             filename="gstappsink.c"
             line="257">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"
             filename="gstappsink.c"
             line="268">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"
             filename="gstappsink.c"
             line="288">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="pull-preroll" when="last" action="1">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="309">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">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="332">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"
             filename="gstappsink.c"
             line="338">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 "drop" and "max-buffers" 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">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="357">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-preroll"
                   when="last"
                   action="1"
                   version="1.10">
        <doc xml:space="preserve"
             filename="gstappsink.c"
             line="363">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">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="388">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"
                 filename="gstappsink.c"
                 line="366">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"
             filename="gstappsink.c"
             line="397">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 "drop" and "max-buffers" 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">
          <doc xml:space="preserve"
               filename="gstappsink.c"
               line="418">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"
                 filename="gstappsink.c"
                 line="400">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"
           filename="gstappsink.h"
           line="48">A set of callbacks that can be installed on the appsink with
gst_app_sink_set_callbacks().</doc>
      <source-position filename="gstappsink.h" line="73"/>
      <field name="eos">
        <callback name="eos">
          <source-position filename="gstappsink.h" line="67"/>
          <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">
        <callback name="new_preroll">
          <source-position filename="gstappsink.h" line="68"/>
          <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">
        <callback name="new_sample">
          <source-position filename="gstappsink.h" line="69"/>
          <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="_gst_reserved" readable="0" private="1">
        <array zero-terminated="0" fixed-size="4">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <record name="AppSinkClass"
            c:type="GstAppSinkClass"
            glib:is-gtype-struct-for="AppSink">
      <source-position filename="gstappsink.h" line="103"/>
      <field name="basesink_class">
        <type name="GstBase.BaseSinkClass" c:type="GstBaseSinkClass"/>
      </field>
      <field name="eos">
        <callback name="eos">
          <source-position filename="gstappsink.h" line="91"/>
          <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">
          <source-position filename="gstappsink.h" line="92"/>
          <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">
          <source-position filename="gstappsink.h" line="93"/>
          <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">
          <source-position filename="gstappsink.h" line="96"/>
          <return-value transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1461">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"
                   filename="gstappsink.c"
                   line="1440">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="pull_sample">
        <callback name="pull_sample">
          <source-position filename="gstappsink.h" line="97"/>
          <return-value transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1486">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"
                   filename="gstappsink.c"
                   line="1472">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="try_pull_preroll">
        <callback name="try_pull_preroll">
          <source-position filename="gstappsink.h" line="98"/>
          <return-value transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1520">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"
                   filename="gstappsink.c"
                   line="1497">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="timeout" transfer-ownership="none">
              <doc xml:space="preserve"
                   filename="gstappsink.c"
                   line="1498">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">
          <source-position filename="gstappsink.h" line="99"/>
          <return-value transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsink.c"
                 line="1616">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"
                   filename="gstappsink.c"
                   line="1600">a #GstAppSink</doc>
              <type name="AppSink" c:type="GstAppSink*"/>
            </parameter>
            <parameter name="timeout" transfer-ownership="none">
              <doc xml:space="preserve"
                   filename="gstappsink.c"
                   line="1601">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="2">
          <type name="gpointer" c:type="gpointer"/>
        </array>
      </field>
    </record>
    <record name="AppSinkPrivate" c:type="GstAppSinkPrivate" disguised="1">
      <source-position filename="gstappsink.h" line="44"/>
    </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"
           filename="gstappsrc.c"
           line="20">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" property controls 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 accessable 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>
      <source-position filename="gstappsrc.h" line="119"/>
      <implements name="Gst.URIHandler"/>
      <virtual-method name="end_of_stream" invoker="end_of_stream">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="2029">Indicates to the appsrc element that the last buffer queued in the
element is the last buffer of the stream.</doc>
        <source-position filename="gstappsrc.h" line="113"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="2036">#GST_FLOW_OK when the EOS was successfuly 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"
                 filename="gstappsrc.c"
                 line="2031">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </virtual-method>
      <virtual-method name="enough_data">
        <source-position filename="gstappsrc.h" line="108"/>
        <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">
        <source-position filename="gstappsrc.h" line="107"/>
        <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"
             filename="gstappsrc.c"
             line="1929">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>
        <source-position filename="gstappsrc.h" line="112"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1940">#GST_FLOW_OK when the buffer was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1931">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer" transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1932">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"
             filename="gstappsrc.c"
             line="1950">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>
        <source-position filename="gstappsrc.h" line="115"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1962">#GST_FLOW_OK when the buffer list was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1952">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer_list" transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1953">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"
             filename="gstappsrc.c"
             line="1974">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>
        <source-position filename="gstappsrc.h" line="114"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1991">#GST_FLOW_OK when the buffer was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1976">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="sample" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1977">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">
        <source-position filename="gstappsrc.h" line="109"/>
        <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"
             filename="gstappsrc.c"
             line="2029">Indicates to the appsrc element that the last buffer queued in the
element is the last buffer of the stream.</doc>
        <source-position filename="gstappsrc.h" line="176"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="2036">#GST_FLOW_OK when the EOS was successfuly 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"
                 filename="gstappsrc.c"
                 line="2031">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_caps" c:identifier="gst_app_src_get_caps">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1356">Get the configured caps on @appsrc.</doc>
        <source-position filename="gstappsrc.h" line="128"/>
        <return-value transfer-ownership="full">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1362">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"
                 filename="gstappsrc.c"
                 line="1358">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"
              version="1.2">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1593">Get the number of currently queued bytes inside @appsrc.</doc>
        <source-position filename="gstappsrc.h" line="155"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1599">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"
                 filename="gstappsrc.c"
                 line="1595">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_duration"
              c:identifier="gst_app_src_get_duration"
              version="1.10">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1457">Get the duration of the stream in nanoseconds. A value of GST_CLOCK_TIME_NONE means that the duration is
not known.</doc>
        <source-position filename="gstappsrc.h" line="140"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1464">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"
                 filename="gstappsrc.c"
                 line="1459">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">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1710">Check if appsrc will emit the "new-preroll" and "new-buffer" signals.</doc>
        <source-position filename="gstappsrc.h" line="167"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1716">%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"
                 filename="gstappsrc.c"
                 line="1712">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"
             filename="gstappsrc.c"
             line="1662">Retrieve the min and max latencies in @min and @max respectively.</doc>
        <source-position filename="gstappsrc.h" line="161"/>
        <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"
                 filename="gstappsrc.c"
                 line="1664">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"
                 filename="gstappsrc.c"
                 line="1665">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"
                 filename="gstappsrc.c"
                 line="1666">the max latency</doc>
            <type name="guint64" c:type="guint64*"/>
          </parameter>
        </parameters>
      </method>
      <method name="get_max_bytes" c:identifier="gst_app_src_get_max_bytes">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1567">Get the maximum amount of bytes that can be queued in @appsrc.</doc>
        <source-position filename="gstappsrc.h" line="152"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1573">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"
                 filename="gstappsrc.c"
                 line="1569">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
        </parameters>
      </method>
      <method name="get_size" c:identifier="gst_app_src_get_size">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1404">Get the size of the stream in bytes. A value of -1 means that the size is
not known.</doc>
        <source-position filename="gstappsrc.h" line="134"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1411">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"
                 filename="gstappsrc.c"
                 line="1406">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">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1512">Get the stream type. Control the stream type of @appsrc
with gst_app_src_set_stream_type().</doc>
        <source-position filename="gstappsrc.h" line="146"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1519">the stream type.</doc>
          <type name="AppStreamType" c:type="GstAppStreamType"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1514">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"
             filename="gstappsrc.c"
             line="1929">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>
        <source-position filename="gstappsrc.h" line="170"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1940">#GST_FLOW_OK when the buffer was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1931">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer" transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1932">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"
             filename="gstappsrc.c"
             line="1950">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>
        <source-position filename="gstappsrc.h" line="173"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1962">#GST_FLOW_OK when the buffer list was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1952">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="buffer_list" transfer-ownership="full">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1953">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"
             filename="gstappsrc.c"
             line="1974">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>
        <source-position filename="gstappsrc.h" line="179"/>
        <return-value transfer-ownership="none">
          <doc xml:space="preserve"
               filename="gstappsrc.c"
               line="1991">#GST_FLOW_OK when the buffer was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
          <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
        </return-value>
        <parameters>
          <instance-parameter name="appsrc" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1976">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="sample" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1977">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"
             filename="gstappsrc.c"
             line="2070">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.</doc>
        <source-position filename="gstappsrc.h" line="182"/>
        <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"
                 filename="gstappsrc.c"
                 line="2072">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="callbacks" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="2073">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"
                 filename="gstappsrc.c"
                 line="2074">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"
                 filename="gstappsrc.c"
                 line="2075">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">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1309">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>
        <source-position filename="gstappsrc.h" line="125"/>
        <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"
                 filename="gstappsrc.c"
                 line="1311">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="caps" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1312">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"
              version="1.10">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1431">Set the duration of the stream in nanoseconds. A value of GST_CLOCK_TIME_NONE means that the duration is
not known.</doc>
        <source-position filename="gstappsrc.h" line="137"/>
        <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"
                 filename="gstappsrc.c"
                 line="1433">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="duration" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1434">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">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1687">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>
        <source-position filename="gstappsrc.h" line="164"/>
        <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"
                 filename="gstappsrc.c"
                 line="1689">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="emit" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1690">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"
             filename="gstappsrc.c"
             line="1647">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>
        <source-position filename="gstappsrc.h" line="158"/>
        <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"
                 filename="gstappsrc.c"
                 line="1649">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="min" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1650">the min latency</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1651">the max latency</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_max_bytes" c:identifier="gst_app_src_set_max_bytes">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1539">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>
        <source-position filename="gstappsrc.h" line="149"/>
        <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"
                 filename="gstappsrc.c"
                 line="1541">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="max" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1542">the maximum number of bytes to queue</doc>
            <type name="guint64" c:type="guint64"/>
          </parameter>
        </parameters>
      </method>
      <method name="set_size" c:identifier="gst_app_src_set_size">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1381">Set the size of the stream in bytes. A value of -1 means that the size is
not known.</doc>
        <source-position filename="gstappsrc.h" line="131"/>
        <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"
                 filename="gstappsrc.c"
                 line="1383">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="size" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1384">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">
        <doc xml:space="preserve"
             filename="gstappsrc.c"
             line="1487">Set the stream type on @appsrc. For seekable streams, the "seek" signal must
be connected to.

A stream_type stream</doc>
        <source-position filename="gstappsrc.h" line="143"/>
        <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"
                 filename="gstappsrc.c"
                 line="1489">a #GstAppSrc</doc>
            <type name="AppSrc" c:type="GstAppSrc*"/>
          </instance-parameter>
          <parameter name="type" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1490">the new state</doc>
            <type name="AppStreamType" c:type="GstAppStreamType"/>
          </parameter>
        </parameters>
      </method>
      <property name="block" writable="1" transfer-ownership="none">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="caps" writable="1" transfer-ownership="none">
        <type name="Gst.Caps"/>
      </property>
      <property name="current-level-bytes" transfer-ownership="none">
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="duration" writable="1" transfer-ownership="none">
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="emit-signals" writable="1" transfer-ownership="none">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="format" writable="1" transfer-ownership="none">
        <type name="Gst.Format"/>
      </property>
      <property name="is-live" writable="1" transfer-ownership="none">
        <type name="gboolean" c:type="gboolean"/>
      </property>
      <property name="max-bytes" writable="1" transfer-ownership="none">
        <type name="guint64" c:type="guint64"/>
      </property>
      <property name="max-latency" writable="1" transfer-ownership="none">
        <type name="gint64" c:type="gint64"/>
      </property>
      <property name="min-latency" writable="1" transfer-ownership="none">
        <type name="gint64" c:type="gint64"/>
      </property>
      <property name="min-percent" writable="1" transfer-ownership="none">
        <type name="guint" c:type="guint"/>
      </property>
      <property name="size" writable="1" transfer-ownership="none">
        <type name="gint64" c:type="gint64"/>
      </property>
      <property name="stream-type" writable="1" transfer-ownership="none">
        <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"
             filename="gstappsrc.c"
             line="528">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"
             filename="gstappsrc.c"
             line="433">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"
             filename="gstappsrc.c"
             line="414">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"
                 filename="gstappsrc.c"
                 line="417">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"
             filename="gstappsrc.c"
             line="462">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 so the buffer 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">
          <type name="Gst.FlowReturn"/>
        </return-value>
        <parameters>
          <parameter name="buffer" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="465">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"
             filename="gstappsrc.c"
             line="480">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 so the buffer list 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">
          <type name="Gst.FlowReturn"/>
        </return-value>
        <parameters>
          <parameter name="buffer_list" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="483">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"
             filename="gstappsrc.c"
             line="501">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 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">
          <type name="Gst.FlowReturn"/>
        </return-value>
        <parameters>
          <parameter name="sample" transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="504">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"
             filename="gstappsrc.c"
             line="446">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"
               filename="gstappsrc.c"
               line="455">%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"
                 filename="gstappsrc.c"
                 line="449">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"
           filename="gstappsrc.h"
           line="49">A set of callbacks that can be installed on the appsrc with
gst_app_src_set_callbacks().</doc>
      <source-position filename="gstappsrc.h" line="71"/>
      <field name="need_data">
        <callback name="need_data">
          <source-position filename="gstappsrc.h" line="65"/>
          <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">
        <callback name="enough_data">
          <source-position filename="gstappsrc.h" line="66"/>
          <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">
        <callback name="seek_data">
          <source-position filename="gstappsrc.h" line="67"/>
          <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">
      <source-position filename="gstappsrc.h" line="119"/>
      <field name="basesrc_class">
        <type name="GstBase.BaseSrcClass" c:type="GstBaseSrcClass"/>
      </field>
      <field name="need_data">
        <callback name="need_data">
          <source-position filename="gstappsrc.h" line="107"/>
          <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">
          <source-position filename="gstappsrc.h" line="108"/>
          <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">
          <source-position filename="gstappsrc.h" line="109"/>
          <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">
          <source-position filename="gstappsrc.h" line="112"/>
          <return-value transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1940">#GST_FLOW_OK when the buffer was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <doc xml:space="preserve"
                   filename="gstappsrc.c"
                   line="1931">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="buffer" transfer-ownership="full">
              <doc xml:space="preserve"
                   filename="gstappsrc.c"
                   line="1932">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">
          <source-position filename="gstappsrc.h" line="113"/>
          <return-value transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="2036">#GST_FLOW_OK when the EOS was successfuly 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"
                   filename="gstappsrc.c"
                   line="2031">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
          </parameters>
        </callback>
      </field>
      <field name="push_sample">
        <callback name="push_sample">
          <source-position filename="gstappsrc.h" line="114"/>
          <return-value transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1991">#GST_FLOW_OK when the buffer was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <doc xml:space="preserve"
                   filename="gstappsrc.c"
                   line="1976">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="sample" transfer-ownership="none">
              <doc xml:space="preserve"
                   filename="gstappsrc.c"
                   line="1977">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">
          <source-position filename="gstappsrc.h" line="115"/>
          <return-value transfer-ownership="none">
            <doc xml:space="preserve"
                 filename="gstappsrc.c"
                 line="1962">#GST_FLOW_OK when the buffer list was successfuly queued.
#GST_FLOW_FLUSHING when @appsrc is not PAUSED or PLAYING.
#GST_FLOW_EOS when EOS occured.</doc>
            <type name="Gst.FlowReturn" c:type="GstFlowReturn"/>
          </return-value>
          <parameters>
            <parameter name="appsrc" transfer-ownership="none">
              <doc xml:space="preserve"
                   filename="gstappsrc.c"
                   line="1952">a #GstAppSrc</doc>
              <type name="AppSrc" c:type="GstAppSrc*"/>
            </parameter>
            <parameter name="buffer_list" transfer-ownership="full">
              <doc xml:space="preserve"
                   filename="gstappsrc.c"
                   line="1953">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>
    <record name="AppSrcPrivate" c:type="GstAppSrcPrivate" disguised="1">
      <source-position filename="gstappsrc.h" line="45"/>
    </record>
    <enumeration name="AppStreamType"
                 glib:type-name="GstAppStreamType"
                 glib:get-type="gst_app_stream_type_get_type"
                 c:type="GstAppStreamType">
      <doc xml:space="preserve"
           filename="gstappsrc.h"
           line="73">The stream type.</doc>
      <member name="stream"
              value="0"
              c:identifier="GST_APP_STREAM_TYPE_STREAM"
              glib:nick="stream">
        <doc xml:space="preserve"
             filename="gstappsrc.h"
             line="75">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">
        <doc xml:space="preserve"
             filename="gstappsrc.h"
             line="77">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">
        <doc xml:space="preserve"
             filename="gstappsrc.h"
             line="79">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">
      <source-position filename="gstappsink.h" line="34"/>
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_APP_SINK_CLASS"
                    c:identifier="GST_IS_APP_SINK_CLASS"
                    introspectable="0">
      <source-position filename="gstappsink.h" line="36"/>
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_APP_SRC"
                    c:identifier="GST_IS_APP_SRC"
                    introspectable="0">
      <source-position filename="gstappsrc.h" line="35"/>
      <parameters>
        <parameter name="obj">
        </parameter>
      </parameters>
    </function-macro>
    <function-macro name="IS_APP_SRC_CLASS"
                    c:identifier="GST_IS_APP_SRC_CLASS"
                    introspectable="0">
      <source-position filename="gstappsrc.h" line="37"/>
      <parameters>
        <parameter name="klass">
        </parameter>
      </parameters>
    </function-macro>
  </namespace>
</repository>