gstreamer/docs/plugins/inspect/plugin-dtmf.xml

<plugin>
  <name>dtmf</name>
  <description>DTMF plugins</description>
  <filename>../../gst/dtmf/.libs/libgstdtmf.so</filename>
  <basename>libgstdtmf.so</basename>
  <version>1.5.1</version>
  <license>LGPL</license>
  <source>gst-plugins-good</source>
  <package>GStreamer Good Plug-ins source release</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>dtmfsrc</name>
      <longname>DTMF tone generator</longname>
      <class>Source/Audio</class>
      <description>Generates DTMF tones</description>
      <author>Youness Alaoui &lt;youness.alaoui@collabora.co.uk&gt;</author>
      <pads>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string)S16LE, rate=(int)[ 1, 2147483647 ], channels=(int)1</details>
        </caps>
      </pads>
    </element>
    <element>
      <name>rtpdtmfdepay</name>
      <longname>RTP DTMF packet depayloader</longname>
      <class>Codec/Depayloader/Network</class>
      <description>Generates DTMF Sound from telephone-event RTP packets</description>
      <author>Youness Alaoui &lt;youness.alaoui@collabora.co.uk&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>application/x-rtp, media=(string)audio, payload=(int)[ 96, 127 ], clock-rate=(int)[ 0, 2147483647 ], encoding-name=(string)TELEPHONE-EVENT</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string)S16LE, rate=(int)[ 1, 2147483647 ], channels=(int)1</details>
        </caps>
      </pads>
    </element>
    <element>
      <name>rtpdtmfsrc</name>
      <longname>RTP DTMF packet generator</longname>
      <class>Source/Network</class>
      <description>Generates RTP DTMF packets</description>
      <author>Zeeshan Ali &lt;zeeshan.ali@nokia.com&gt;</author>
      <pads>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>application/x-rtp, media=(string)audio, payload=(int)[ 96, 127 ], clock-rate=(int)[ 0, 2147483647 ], encoding-name=(string)TELEPHONE-EVENT</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>