package net.sf.fmj.media.codec.audio.ulaw;
import java.util.logging.Logger;
import javax.media.Buffer;
import javax.media.Format;
import javax.media.format.AudioFormat;
import net.sf.fmj.media.AbstractCodec;
import net.sf.fmj.media.AudioFormatCompleter;
import net.sf.fmj.utility.LoggerSingleton;
import net.sf.fmj.utility.LoggingStringUtils;
/**
* ULAW decoder Codec.
* @author Ken Larson
*
*/
public class Decoder extends AbstractCodec
{
private static final Logger logger = LoggerSingleton.logger;
@Override
public String getName()
{
return "ULAW Decoder";
}
public Decoder()
{
super();
this.inputFormats = new Format[] {
new AudioFormat(AudioFormat.ULAW, -1.0, 8, 1, -1, AudioFormat.SIGNED, 8, -1.0, Format.byteArray)
};
}
// TODO: move to base class?
protected Format[] outputFormats = new Format[] {
new AudioFormat(AudioFormat.LINEAR, -1.0, 16, 1, -1, AudioFormat.SIGNED, 16, -1.0, Format.byteArray)
};
@Override
public Format setOutputFormat(Format format)
{
if (!(format instanceof AudioFormat))
return null;
final AudioFormat audioFormat = (AudioFormat) format;
return super.setOutputFormat(AudioFormatCompleter.complete(audioFormat));
}
@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.ULAW) ||
(inputCast.getSampleSizeInBits() != 8 && inputCast.getSampleSizeInBits() != Format.NOT_SPECIFIED) ||
(inputCast.getChannels() != 1 && inputCast.getChannels() != Format.NOT_SPECIFIED) ||
(inputCast.getSigned() != AudioFormat.SIGNED && inputCast.getSigned() != Format.NOT_SPECIFIED) ||
(inputCast.getFrameSizeInBits() != 8 && inputCast.getFrameSizeInBits() != Format.NOT_SPECIFIED) ||
(inputCast.getDataType() != null && inputCast.getDataType() != Format.byteArray)
)
{ 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};
}
// mgodehardt if input is 8Bit, it has no endian, this causes problems with other codecs when you give them 16bit with no endian
// TODO: it would be nice to have it based on target platform ( is mac big endian ? )
int endian = inputCast.getEndian();
if ( inputCast.getSampleSizeInBits() == 8 )
{
endian = AudioFormat.LITTLE_ENDIAN;
}
final AudioFormat result = new AudioFormat(AudioFormat.LINEAR, inputCast.getSampleRate(), 16,
1, endian, AudioFormat.SIGNED, 16,
inputCast.getFrameRate(), Format.byteArray);
return new Format[] {result};
}
}
@Override
public void open()
{
}
@Override
public void close()
{
}
private static final boolean TRACE = false;
@Override
public int process(Buffer inputBuffer, Buffer outputBuffer)
{
if (TRACE) dump("input ", inputBuffer);
if (!checkInputBuffer(inputBuffer))
{
return BUFFER_PROCESSED_FAILED;
}
if (isEOM(inputBuffer))
{
propagateEOM(outputBuffer); // TODO: what about data? can there be any?
return BUFFER_PROCESSED_OK;
}
byte[] outputBufferData = (byte []) outputBuffer.getData();
if (outputBufferData == null || outputBufferData.length < inputBuffer.getLength() * 2)
{ outputBufferData = new byte[inputBuffer.getLength() * 2];
outputBuffer.setData(outputBufferData);
}
final boolean bigEndian = ((AudioFormat) outputFormat).getEndian() == AudioFormat.BIG_ENDIAN; // TODO: check for undefined
MuLawDecoderUtil.muLawDecode(bigEndian, (byte []) inputBuffer.getData(), inputBuffer.getOffset(), inputBuffer.getLength(), outputBufferData);
outputBuffer.setLength(inputBuffer.getLength() * 2);
outputBuffer.setOffset(0);
outputBuffer.setFormat(outputFormat);
final int result = BUFFER_PROCESSED_OK;
if (TRACE)
{ dump("input ", inputBuffer);
dump("output", outputBuffer);
System.out.println("Result=" + LoggingStringUtils.plugInResultToStr(result));
}
return result;
}
@Override
public Format setInputFormat(Format arg0)
{
// TODO: force sample size, etc
return super.setInputFormat(arg0);
}
}