public AudioFormat[] getTargetFormats(
AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat) {
if ((AudioFormat.Encoding.PCM_SIGNED.equals(targetEncoding)
&& AudioFormat.Encoding.ULAW.equals(sourceFormat.getEncoding()))
|| (AudioFormat.Encoding.ULAW.equals(targetEncoding)
&& AudioFormat.Encoding.PCM_SIGNED.equals(sourceFormat.getEncoding()))) {
return getOutputFormats(sourceFormat);
} else {
return new AudioFormat[0];
}
}
public AudioInputStream getAudioInputStream(
AudioFormat.Encoding targetEncoding, AudioInputStream sourceStream) {
AudioFormat sourceFormat = sourceStream.getFormat();
AudioFormat.Encoding sourceEncoding = sourceFormat.getEncoding();
if (sourceEncoding.equals(targetEncoding)) {
return sourceStream;
} else {
AudioFormat targetFormat = null;
if (!isConversionSupported(targetEncoding, sourceStream.getFormat())) {
throw new IllegalArgumentException(
"Unsupported conversion: "
+ sourceStream.getFormat().toString()
+ " to "
+ targetEncoding.toString());
}
if (AudioFormat.Encoding.ULAW.equals(sourceEncoding)
&& AudioFormat.Encoding.PCM_SIGNED.equals(targetEncoding)) {
targetFormat =
new AudioFormat(
targetEncoding,
sourceFormat.getSampleRate(),
16,
sourceFormat.getChannels(),
2 * sourceFormat.getChannels(),
sourceFormat.getSampleRate(),
sourceFormat.isBigEndian());
} else if (AudioFormat.Encoding.PCM_SIGNED.equals(sourceEncoding)
&& AudioFormat.Encoding.ULAW.equals(targetEncoding)) {
targetFormat =
new AudioFormat(
targetEncoding,
sourceFormat.getSampleRate(),
8,
sourceFormat.getChannels(),
sourceFormat.getChannels(),
sourceFormat.getSampleRate(),
false);
} else {
throw new IllegalArgumentException(
"Unsupported conversion: "
+ sourceStream.getFormat().toString()
+ " to "
+ targetEncoding.toString());
}
return getAudioInputStream(targetFormat, sourceStream);
}
}
UlawCodecStream(AudioInputStream stream, AudioFormat outputFormat) {
super(stream, outputFormat, AudioSystem.NOT_SPECIFIED);
AudioFormat inputFormat = stream.getFormat();
// throw an IllegalArgumentException if not ok
if (!(isConversionSupported(outputFormat, inputFormat))) {
throw new IllegalArgumentException(
"Unsupported conversion: " + inputFormat.toString() + " to " + outputFormat.toString());
}
// $$fb 2002-07-18: fix for 4714846: JavaSound ULAW (8-bit) encoder erroneously depends on
// endian-ness
boolean PCMIsBigEndian;
// determine whether we are encoding or decoding
if (AudioFormat.Encoding.ULAW.equals(inputFormat.getEncoding())) {
encode = false;
encodeFormat = inputFormat;
decodeFormat = outputFormat;
PCMIsBigEndian = outputFormat.isBigEndian();
} else {
encode = true;
encodeFormat = outputFormat;
decodeFormat = inputFormat;
PCMIsBigEndian = inputFormat.isBigEndian();
tempBuffer = new byte[tempBufferSize];
}
// setup tables according to byte order
if (PCMIsBigEndian) {
tabByte1 = ULAW_TABH;
tabByte2 = ULAW_TABL;
highByte = 0;
lowByte = 1;
} else {
tabByte1 = ULAW_TABL;
tabByte2 = ULAW_TABH;
highByte = 1;
lowByte = 0;
}
// set the AudioInputStream length in frames if we know it
if (stream instanceof AudioInputStream) {
frameLength = ((AudioInputStream) stream).getFrameLength();
}
// set framePos to zero
framePos = 0;
frameSize = inputFormat.getFrameSize();
if (frameSize == AudioSystem.NOT_SPECIFIED) {
frameSize = 1;
}
}
/* public AudioFormat[] getOutputFormats(AudioFormat inputFormat) { */
private AudioFormat[] getOutputFormats(AudioFormat inputFormat) {
Vector formats = new Vector();
AudioFormat format;
if ((inputFormat.getSampleSizeInBits() == 16)
&& AudioFormat.Encoding.PCM_SIGNED.equals(inputFormat.getEncoding())) {
format =
new AudioFormat(
AudioFormat.Encoding.ULAW,
inputFormat.getSampleRate(),
8,
inputFormat.getChannels(),
inputFormat.getChannels(),
inputFormat.getSampleRate(),
false);
formats.addElement(format);
}
if (AudioFormat.Encoding.ULAW.equals(inputFormat.getEncoding())) {
format =
new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
inputFormat.getSampleRate(),
16,
inputFormat.getChannels(),
inputFormat.getChannels() * 2,
inputFormat.getSampleRate(),
false);
formats.addElement(format);
format =
new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
inputFormat.getSampleRate(),
16,
inputFormat.getChannels(),
inputFormat.getChannels() * 2,
inputFormat.getSampleRate(),
true);
formats.addElement(format);
}
AudioFormat[] formatArray = new AudioFormat[formats.size()];
for (int i = 0; i < formatArray.length; i++) {
formatArray[i] = (AudioFormat) (formats.elementAt(i));
}
return formatArray;
}
@Override
public AudioFileFormat.Type[] getAudioFileTypes(AudioInputStream stream) {
AudioFileFormat.Type[] filetypes = new AudioFileFormat.Type[types.length];
System.arraycopy(types, 0, filetypes, 0, types.length);
// make sure we can write this stream
AudioFormat format = stream.getFormat();
AudioFormat.Encoding encoding = format.getEncoding();
if (AudioFormat.Encoding.ALAW.equals(encoding)
|| AudioFormat.Encoding.ULAW.equals(encoding)
|| AudioFormat.Encoding.PCM_SIGNED.equals(encoding)
|| AudioFormat.Encoding.PCM_UNSIGNED.equals(encoding)) {
return filetypes;
}
return new AudioFileFormat.Type[0];
}
public AudioFormat.Encoding[] getTargetEncodings(AudioFormat sourceFormat) {
if (AudioFormat.Encoding.PCM_SIGNED.equals(sourceFormat.getEncoding())) {
if (sourceFormat.getSampleSizeInBits() == 16) {
AudioFormat.Encoding enc[] = new AudioFormat.Encoding[1];
enc[0] = AudioFormat.Encoding.ULAW;
return enc;
} else {
return new AudioFormat.Encoding[0];
}
} else if (AudioFormat.Encoding.ULAW.equals(sourceFormat.getEncoding())) {
if (sourceFormat.getSampleSizeInBits() == 8) {
AudioFormat.Encoding enc[] = new AudioFormat.Encoding[1];
enc[0] = AudioFormat.Encoding.PCM_SIGNED;
return enc;
} else {
return new AudioFormat.Encoding[0];
}
} else {
return new AudioFormat.Encoding[0];
}
}
/**
* Returns the AudioFileFormat describing the file that will be written from this
* AudioInputStream. Throws IllegalArgumentException if not supported.
*/
private AudioFileFormat getAudioFileFormat(AudioFileFormat.Type type, AudioInputStream stream) {
if (!isFileTypeSupported(type, stream)) {
throw new IllegalArgumentException("File type " + type + " not supported.");
}
AudioFormat format = null;
WaveFileFormat fileFormat = null;
AudioFormat.Encoding encoding = AudioFormat.Encoding.PCM_SIGNED;
AudioFormat streamFormat = stream.getFormat();
AudioFormat.Encoding streamEncoding = streamFormat.getEncoding();
float sampleRate;
int sampleSizeInBits;
int channels;
int frameSize;
float frameRate;
int fileSize;
int waveType = WaveFileFormat.WAVE_FORMAT_PCM;
if (AudioFormat.Encoding.ALAW.equals(streamEncoding)
|| AudioFormat.Encoding.ULAW.equals(streamEncoding)) {
encoding = streamEncoding;
sampleSizeInBits = streamFormat.getSampleSizeInBits();
if (streamEncoding.equals(AudioFormat.Encoding.ALAW)) {
waveType = WaveFileFormat.WAVE_FORMAT_ALAW;
} else {
waveType = WaveFileFormat.WAVE_FORMAT_MULAW;
}
} else if (streamFormat.getSampleSizeInBits() == 8) {
encoding = AudioFormat.Encoding.PCM_UNSIGNED;
sampleSizeInBits = 8;
} else {
encoding = AudioFormat.Encoding.PCM_SIGNED;
sampleSizeInBits = streamFormat.getSampleSizeInBits();
}
format =
new AudioFormat(
encoding,
streamFormat.getSampleRate(),
sampleSizeInBits,
streamFormat.getChannels(),
streamFormat.getFrameSize(),
streamFormat.getFrameRate(),
false); // WAVE is little endian
if (stream.getFrameLength() != AudioSystem.NOT_SPECIFIED) {
fileSize =
(int) stream.getFrameLength() * streamFormat.getFrameSize()
+ WaveFileFormat.getHeaderSize(waveType);
} else {
fileSize = AudioSystem.NOT_SPECIFIED;
}
fileFormat =
new WaveFileFormat(
AudioFileFormat.Type.WAVE, fileSize, format, (int) stream.getFrameLength());
return fileFormat;
}