grc/decoding/gsm_tch_f_decoder.xml

<?xml version="1.0"?>
<block>
  <name>TCH/F decoder</name>
  <key>gsm_tch_f_decoder</key>
  <import>import grgsm</import>
  <make>grgsm.tch_f_decoder($mode, $file)</make>

  <param>
    <name>TCH coding mode</name>
    <key>mode</key>
    <type>enum</type>
    <option>
      <name>GSM-FR</name>
      <key>grgsm.MODE_SPEECH_FR</key>
    </option>
    <option>
      <name>GSM-EFR</name>
      <key>grgsm.MODE_SPEECH_EFR</key>
    </option>
  </param>
  <param>
    <name>destination file</name>
    <key>file</key>
    <value>/tmp/speech.gsm</value>
    <type>file_open</type>
  </param>

  <sink>
    <name>bursts</name>
    <type>message</type>
  </sink>
  <source>
    <name>msgs</name>
    <type>message</type>
    <optional>1</optional>
  </source>
</block>