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

<plugin>
  <name>gsm</name>
  <description>GSM encoder/decoder</description>
  <filename>../../ext/gsm/.libs/libgstgsm.so</filename>
  <basename>libgstgsm.so</basename>
  <version>1.11.90</version>
  <license>LGPL</license>
  <source>gst-plugins-bad</source>
  <package>GStreamer Bad Plug-ins source release</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>gsmdec</name>
      <longname>GSM audio decoder</longname>
      <class>Codec/Decoder/Audio</class>
      <description>Decodes GSM encoded audio</description>
      <author>Philippe Khalaf &lt;burger@speedy.org&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>audio/x-gsm, rate=(int)8000, channels=(int)1; audio/ms-gsm, rate=(int)[ 1, 2147483647 ], channels=(int)1</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)1</details>
        </caps>
      </pads>
    </element>
    <element>
      <name>gsmenc</name>
      <longname>GSM audio encoder</longname>
      <class>Codec/Encoder/Audio</class>
      <description>Encodes GSM audio</description>
      <author>Philippe Khalaf &lt;burger@speedy.org&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string)S16LE, layout=(string)interleaved, rate=(int)8000, channels=(int)1</details>
        </caps>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-gsm, rate=(int)8000, channels=(int)1</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>