public String noDataReceived() {
/*
* Create a packet of silence (linear 0)
* The dtmf detector needs to know when a dtmf key
* is released. If a phone stops sending immediately
* after the dtmf key is released, we need to append
* silence so that the dtmf detector will return
* the dtmf key.
*/
int[] silence = new int[mediaInfo.getSamplesPerPacket()];
String dtmfKeys = null;
dtmfKeys = processData(silence);
if (Logger.logLevel >= Logger.LOG_DETAIL) {
Logger.println("no data received, done processing dtmf with silence");
if (dtmfKeys != null) {
Logger.println("silence. dtmf " + dtmfKeys);
}
}
return dtmfKeys;
}
public DtmfDecoder(MemberReceiver memberReceiver, MediaInfo mediaInfo) {
this.memberReceiver = memberReceiver;
this.mediaInfo = mediaInfo;
decoder = new Decoder();
linearData = new int[mediaInfo.getSamplesPerPacket()];
decoder.setRate(mediaInfo.getSampleRate());
if (mediaInfo.getChannels() != 1) {
/*
* Must convert multi-channel to 1
*/
try {
sampleRateConverter =
new SampleRateConverter(
"DtmfDecoder",
mediaInfo.getSampleRate(),
mediaInfo.getChannels(),
mediaInfo.getSampleRate(),
1);
} catch (IOException e) {
Logger.println("Call " + memberReceiver + " DtmfDecoder: " + e.getMessage());
}
}
}
