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

<plugin>
  <name>alsa</name>
  <description>ALSA plugin library</description>
  <filename>../../ext/alsa/.libs/libgstalsa.so</filename>
  <basename>libgstalsa.so</basename>
  <version>1.3.3</version>
  <license>LGPL</license>
  <source>gst-plugins-base</source>
  <package>GStreamer Base Plug-ins source release</package>
  <origin>Unknown package origin</origin>
  <elements>
    <element>
      <name>alsasink</name>
      <longname>Audio sink (ALSA)</longname>
      <class>Sink/Audio</class>
      <description>Output to a sound card via ALSA</description>
      <author>Wim Taymans &lt;wim@fluendo.com&gt;</author>
      <pads>
        <caps>
          <name>sink</name>
          <direction>sink</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string){ S8, U8, S16LE, S16BE, U16LE, U16BE, S24_32LE, S24_32BE, U24_32LE, U24_32BE, S32LE, S32BE, U32LE, U32BE, S24LE, S24BE, U24LE, U24BE, S20LE, S20BE, U20LE, U20BE, S18LE, S18BE, U18LE, U18BE, F32LE, F32BE, F64LE, F64BE }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]; audio/x-ac3, framed=(boolean)true; audio/x-eac3, framed=(boolean)true; audio/x-dts, framed=(boolean)true, block-size=(int){ 512, 1024, 2048 }; audio/mpeg, mpegversion=(int)1, mpegaudioversion=(int)[ 1, 2 ], parsed=(boolean)true</details>
        </caps>
      </pads>
    </element>
    <element>
      <name>alsasrc</name>
      <longname>Audio source (ALSA)</longname>
      <class>Source/Audio</class>
      <description>Read from a sound card via ALSA</description>
      <author>Wim Taymans &lt;wim@fluendo.com&gt;</author>
      <pads>
        <caps>
          <name>src</name>
          <direction>source</direction>
          <presence>always</presence>
          <details>audio/x-raw, format=(string){ S8, U8, S16LE, S16BE, U16LE, U16BE, S24_32LE, S24_32BE, U24_32LE, U24_32BE, S32LE, S32BE, U32LE, U32BE, S24LE, S24BE, U24LE, U24BE, S20LE, S20BE, U20LE, U20BE, S18LE, S18BE, U18LE, U18BE, F32LE, F32BE, F64LE, F64BE }, layout=(string)interleaved, rate=(int)[ 1, 2147483647 ], channels=(int)[ 1, 2147483647 ]</details>
        </caps>
      </pads>
    </element>
  </elements>
</plugin>