package net.sf.fmj.media.codec.audio.gsm;
import java.util.logging.Logger;
import javax.media.Format;
import javax.media.format.AudioFormat;
import net.sf.fmj.media.AbstractDePacketizer;
import net.sf.fmj.utility.LoggerSingleton;
/**
*
* DePacketizer for GSM/RTP. Doesn't have to do much, just copies input to output. Uses buffer-swapping observed in debugging
* and seen in other open-source DePacketizer implementations.
* @author Martin Harvan
*
*/
public class DePacketizer extends AbstractDePacketizer
{
private static final Logger logger = LoggerSingleton.logger;
@Override
public String getName()
{
return "GSM DePacketizer";
}
public DePacketizer()
{
super();
this.inputFormats = new Format[] {new AudioFormat(AudioFormat.GSM_RTP, 8000, 8, 1, -1, AudioFormat.SIGNED, 264, -1.0, Format.byteArray)};
}
// TODO: move to base class?
protected Format[] outputFormats = new Format[] {new AudioFormat(AudioFormat.GSM, 8000, 8, 1, -1, AudioFormat.SIGNED, 264, -1.0, Format.byteArray)};
@Override
public Format[] getSupportedOutputFormats(Format input)
{
if (input == null)
return outputFormats;
else
{
if (!(input instanceof AudioFormat))
{ logger.warning(this.getClass().getSimpleName() + ".getSupportedOutputFormats: input format does not match, returning format array of {null} for " + input); // this can cause an NPE in JMF if it ever happens.
return new Format[] {null};
}
final AudioFormat inputCast = (AudioFormat) input;
if (!inputCast.getEncoding().equals(AudioFormat.GSM_RTP))
{
logger.warning(this.getClass().getSimpleName() + ".getSupportedOutputFormats: input format does not match, returning format array of {null} for " + input); // this can cause an NPE in JMF if it ever happens.
return new Format[] {null};
}
final AudioFormat result = new AudioFormat(AudioFormat.GSM, inputCast.getSampleRate(), inputCast.getSampleSizeInBits(),
inputCast.getChannels(), inputCast.getEndian(), inputCast.getSigned(), inputCast.getFrameSizeInBits(),
inputCast.getFrameRate(), inputCast.getDataType());
return new Format[] {result};
}
}
@Override
public void open()
{
}
@Override
public void close()
{
}
@Override
public Format setInputFormat(Format arg0)
{
return super.setInputFormat(arg0);
}
@Override
public Format setOutputFormat(Format arg0)
{
return super.setOutputFormat(arg0);
}
}