/**
* Construct a RawAudioFormat from an AudioFormat, assuming a WAV header of size WAV_HEADER_SIZE
* (44) bytes.
*
* @param af AudioFormat (e.g. from AudioSystem.getAudioFileFormat(File).
*/
public RawAudioFormat(AudioFormat af) throws IOException {
sr = (int) af.getFrameRate();
br = af.getSampleSizeInBits();
fs = br / 8;
if (af.getChannels() > 1) throw new IOException("multi-channel files are not supported");
if (af.getEncoding() == AudioFormat.Encoding.PCM_SIGNED) {
signed = true;
alaw = false;
ulaw = false;
hs = WAV_HEADER_SIZE;
}
if (af.getEncoding() == AudioFormat.Encoding.PCM_UNSIGNED) {
signed = false;
alaw = false;
ulaw = false;
hs = WAV_HEADER_SIZE;
}
if (af.getEncoding() == AudioFormat.Encoding.ALAW) {
alaw = true;
signed = true;
ulaw = false;
hs = WAV_HEADER_SIZE2;
}
if (af.getEncoding() == AudioFormat.Encoding.ULAW) {
ulaw = true;
signed = true;
alaw = false;
hs = WAV_HEADER_SIZE2;
}
}
public static Clip loadClip(URL url) {
Clip clip = null;
String fnm = "" + url;
try {
AudioInputStream stream = AudioSystem.getAudioInputStream(url);
AudioFormat format = stream.getFormat();
if ((format.getEncoding() == AudioFormat.Encoding.ULAW)
|| (format.getEncoding() == AudioFormat.Encoding.ALAW)) {
AudioFormat newFormat =
new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
format.getSampleRate(),
format.getSampleSizeInBits() * 2,
format.getChannels(),
format.getFrameSize() * 2,
format.getFrameRate(),
true); // big endian
stream = AudioSystem.getAudioInputStream(newFormat, stream);
// System.out.println("Converted Audio format: " + newFormat);
format = newFormat;
}
DataLine.Info info = new DataLine.Info(Clip.class, format);
// make sure sound system supports data line
if (!AudioSystem.isLineSupported(info)) {
System.out.println("Unsupported Clip File: " + fnm);
return null;
}
// get clip line resource
clip = (Clip) AudioSystem.getLine(info);
clip.open(stream); // open the sound file as a clip
stream.close(); // we're done with the input stream
// duration (in secs) of the clip
double duration = clip.getMicrosecondLength() / 1000000.0; // new
if (duration <= 1.0) {
System.out.println("WARNING. Duration <= 1 sec : " + duration + " secs");
System.out.println(
" The clip in " + fnm + " may not play in J2SE 1.5 -- make it longer");
}
// else
// System.out.println(fnm + ": Duration: " + duration + " secs");
} // end of try block
catch (UnsupportedAudioFileException audioException) {
System.out.println("Unsupported audio file: " + fnm);
} catch (LineUnavailableException noLineException) {
System.out.println("No audio line available for : " + fnm);
} catch (IOException ioException) {
System.out.println("Could not read: " + fnm);
} catch (Exception e) {
System.out.println("Problem with " + fnm);
}
return clip;
} // end of loadClip()
public void open(AudioInputStream stream) throws IOException, LineUnavailableException {
AudioInputStream is1;
format = stream.getFormat();
if (format.getEncoding() != AudioFormat.Encoding.PCM_SIGNED) {
is1 = AudioSystem.getAudioInputStream(AudioFormat.Encoding.PCM_SIGNED, stream);
} else {
is1 = stream;
}
format = is1.getFormat();
InputStream is2;
if (parent != null) {
ProgressMonitorInputStream pmis =
new ProgressMonitorInputStream(parent, "Loading track..", is1);
pmis.getProgressMonitor().setMillisToPopup(0);
is2 = pmis;
} else {
is2 = is1;
}
byte[] buf = new byte[2 ^ 16];
int totalRead = 0;
int numRead = 0;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
numRead = is2.read(buf);
while (numRead > -1) {
baos.write(buf, 0, numRead);
numRead = is2.read(buf, 0, buf.length);
totalRead += numRead;
}
is2.close();
audioData = baos.toByteArray();
AudioFormat afTemp;
if (format.getChannels() < 2) {
afTemp =
new AudioFormat(
format.getEncoding(),
format.getSampleRate(),
format.getSampleSizeInBits(),
2,
format.getSampleSizeInBits() * 2 / 8, // calculate
// frame
// size
format.getFrameRate(),
format.isBigEndian());
} else {
afTemp = format;
}
setLoopPoints(0, audioData.length);
dataLine = AudioSystem.getSourceDataLine(afTemp);
dataLine.open();
inputStream = new ByteArrayInputStream(audioData);
}
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];
}
}
/**
* Inits a DateLine.<br>
* We check if the line supports Gain and Pan controls.
*
* <p>From the AudioInputStream, i.e. from the sound file, we fetch information about the format
* of the audio data. These information include the sampling frequency, the number of channels and
* the size of the samples. There information are needed to ask JavaSound for a suitable output
* line for this audio file. Furthermore, we have to give JavaSound a hint about how big the
* internal buffer for the line should be. Here, we say AudioSystem.NOT_SPECIFIED, signaling that
* we don't care about the exact size. JavaSound will use some default value for the buffer size.
*/
protected void createLine() throws LineUnavailableException {
log.info("Create Line");
if (m_line == null) {
AudioFormat sourceFormat = m_audioInputStream.getFormat();
log.info("Create Line : Source format : " + sourceFormat.toString());
int nSampleSizeInBits = sourceFormat.getSampleSizeInBits();
if (nSampleSizeInBits <= 0) {
nSampleSizeInBits = 16;
}
if ((sourceFormat.getEncoding() == AudioFormat.Encoding.ULAW)
|| (sourceFormat.getEncoding() == AudioFormat.Encoding.ALAW)) {
nSampleSizeInBits = 16;
}
if (nSampleSizeInBits != 8) {
nSampleSizeInBits = 16;
}
AudioFormat targetFormat =
new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
sourceFormat.getSampleRate(),
nSampleSizeInBits,
sourceFormat.getChannels(),
sourceFormat.getChannels() * (nSampleSizeInBits / 8),
sourceFormat.getSampleRate(),
false);
log.info("Create Line : Target format: " + targetFormat);
// Keep a reference on encoded stream to progress notification.
m_encodedaudioInputStream = m_audioInputStream;
try {
// Get total length in bytes of the encoded stream.
encodedLength = m_encodedaudioInputStream.available();
} catch (IOException e) {
log.log(Level.SEVERE, "Cannot get m_encodedaudioInputStream.available()", e);
}
// Create decoded stream.
m_audioInputStream = AudioSystem.getAudioInputStream(targetFormat, m_audioInputStream);
AudioFormat audioFormat = m_audioInputStream.getFormat();
DataLine.Info info = new DataLine.Info(SourceDataLine.class, audioFormat, -1);
Mixer mixer = getMixer(m_mixerName);
if (mixer != null) {
log.info("Mixer : " + mixer.getMixerInfo().toString());
m_line = (SourceDataLine) mixer.getLine(info);
} else {
m_line = (SourceDataLine) AudioSystem.getLine(info);
m_mixerName = null;
}
log.info("Line : " + m_line.toString());
log.info("Line Info : " + m_line.getLineInfo().toString());
log.info("Line AudioFormat: " + m_line.getFormat().toString());
}
}
/* 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;
}
/**
* Numbers used here are verbatim from Javazoom
*
* @param baseFormat
* @return
*/
private AudioFormat getDecodedFormat(AudioFormat baseFormat) {
// Do we need to "decode" the base format?
if (AudioFormat.Encoding.PCM_SIGNED.equals(baseFormat.getEncoding())
|| AudioFormat.Encoding.PCM_UNSIGNED.equals(baseFormat.getEncoding())) {
return baseFormat;
}
return new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
baseFormat.getSampleRate(),
16,
baseFormat.getChannels(),
baseFormat.getChannels() * 2,
baseFormat.getSampleRate(),
false);
}
/**
* Sets the InputStream from which this StreamDataSource reads.
*
* @param inputStream the InputStream from which audio data comes
* @param streamName the name of the InputStream
*/
public void setInputStream(AudioInputStream inputStream, String streamName) {
dataStream = inputStream;
streamEndReached = false;
utteranceEndSent = false;
utteranceStarted = false;
AudioFormat format = inputStream.getFormat();
sampleRate = (int) format.getSampleRate();
bigEndian = format.isBigEndian();
String s = format.toString();
logger.finer("input format is " + s);
if (format.getSampleSizeInBits() % 8 != 0)
throw new Error("StreamDataSource: bits per sample must be a multiple of 8.");
bytesPerValue = format.getSampleSizeInBits() / 8;
// test whether all files in the stream have the same format
AudioFormat.Encoding encoding = format.getEncoding();
if (encoding.equals(AudioFormat.Encoding.PCM_SIGNED)) signedData = true;
else if (encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED)) signedData = false;
else throw new RuntimeException("used file encoding is not supported");
totalValuesRead = 0;
}
private void doPlay(File file) {
AudioInputStream actualAudioIn = null;
this.file = file;
try (AudioInputStream audioIn = AudioSystem.getAudioInputStream(file)) {
AudioFormat baseFormat = audioIn.getFormat();
System.out.println(baseFormat.getEncoding());
AudioFormat decodedFormat = getDecodedFormat(baseFormat);
// make new audio in stream based on decoded format
actualAudioIn = AudioSystem.getAudioInputStream(decodedFormat, audioIn);
// get data from audio system
line = getLine(decodedFormat);
line.addLineListener(this);
doPlay(decodedFormat, actualAudioIn);
audioIn.close();
} catch (Exception e) {
logger.log(Level.WARNING, "Exception playing file '" + file.getName() + "'", e);
} finally {
if (actualAudioIn != null) {
try {
actualAudioIn.close();
} catch (IOException e) {
}
}
if (line != null) line.close();
}
}
/**
* Test method for {@link net.sourceforge.gjtapi.protocols.JavaSoundParser#parse(java.net.URL)} .
*
* @exception Exception test failed.
*/
@Test
public void testParse() throws Exception {
final URL url = new URL("playback://audio?rate=8000&channels=2&encoding=pcm");
AudioFormat format = JavaSoundParser.parse(url);
Assert.assertEquals(new Float(8000.0), new Float(format.getSampleRate()));
Assert.assertEquals(2, format.getChannels());
Assert.assertEquals(AudioFormat.Encoding.PCM_SIGNED, format.getEncoding());
}
/**
* Store an AudioFormat
*
* @param audioFormat
*/
public AudioFormatTransport(AudioFormat audioFormat) {
_channels = audioFormat.getChannels();
_encoding = audioFormat.getEncoding().toString();
_frameRate = audioFormat.getFrameRate();
_frameSize = audioFormat.getFrameSize();
_sampleRate = audioFormat.getSampleRate();
_sampleSizeInBits = audioFormat.getSampleSizeInBits();
_isBigEndian = audioFormat.isBigEndian();
_properties = audioFormat.properties();
}
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];
}
}
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;
}
}
private AudioInputStream toLittleEndian(AudioInputStream ais) {
AudioFormat format = ais.getFormat();
AudioFormat targetFormat =
new AudioFormat(
format.getEncoding(),
format.getSampleRate(),
format.getSampleSizeInBits(),
format.getChannels(),
format.getFrameSize(),
format.getFrameRate(),
false);
return AudioSystem.getAudioInputStream(targetFormat, ais);
}
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);
}
}
WaveFileFormat(
AudioFileFormat.Type type, int lengthInBytes, AudioFormat format, int lengthInFrames) {
super(type, lengthInBytes, format, lengthInFrames);
AudioFormat.Encoding encoding = format.getEncoding();
if (encoding.equals(AudioFormat.Encoding.ALAW)) {
waveType = WAVE_FORMAT_ALAW;
} else if (encoding.equals(AudioFormat.Encoding.ULAW)) {
waveType = WAVE_FORMAT_MULAW;
} else if (encoding.equals(AudioFormat.Encoding.PCM_SIGNED)
|| encoding.equals(AudioFormat.Encoding.PCM_UNSIGNED)) {
waveType = WAVE_FORMAT_PCM;
} else {
waveType = WAVE_FORMAT_UNKNOWN;
}
}
/** Convert javax.sound.sampled.AudioFormat to javax.media.format.AudioFormat. */
public static AudioFormat convertFormat(javax.sound.sampled.AudioFormat format) {
Encoding encoding = format.getEncoding();
int channels = format.getChannels();
float frameRate = format.getFrameRate();
int frameSize = format.getFrameSize() < 0 ? format.getFrameSize() : (format.getFrameSize() * 8);
float sampleRate = format.getSampleRate();
int sampleSize = format.getSampleSizeInBits();
int endian = format.isBigEndian() ? AudioFormat.BIG_ENDIAN : AudioFormat.LITTLE_ENDIAN;
int signed = AudioFormat.NOT_SPECIFIED;
String encodingString = AudioFormat.LINEAR;
if (encoding == Encoding.PCM_SIGNED) {
signed = AudioFormat.SIGNED;
encodingString = AudioFormat.LINEAR;
} else if (encoding == Encoding.PCM_UNSIGNED) {
signed = AudioFormat.UNSIGNED;
encodingString = AudioFormat.LINEAR;
} else if (encoding == Encoding.ALAW) {
encodingString = AudioFormat.ALAW;
} else if (encoding == Encoding.ULAW) {
encodingString = AudioFormat.ULAW;
} else {
encodingString = encoding.toString();
}
AudioFormat jmfFormat =
new AudioFormat(
encodingString,
(double) sampleRate,
sampleSize,
channels,
endian,
signed,
frameSize,
frameRate,
AudioFormat.byteArray);
return jmfFormat;
}
@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 float[] extractFloatDataFromAmplitudeByteArray(AudioFormat format, byte[] audioBytes) {
// convert
audioData = null;
if (format.getSampleSizeInBits() == 16) {
int nlengthInSamples = audioBytes.length / 2;
audioData = new float[nlengthInSamples];
if (format.isBigEndian()) {
for (int i = 0; i < nlengthInSamples; i++) {
/* First byte is MSB (high order) */
int MSB = audioBytes[2 * i];
/* Second byte is LSB (low order) */
int LSB = audioBytes[2 * i + 1];
audioData[i] = MSB << 8 | (255 & LSB);
}
} else {
for (int i = 0; i < nlengthInSamples; i++) {
/* First byte is LSB (low order) */
int LSB = audioBytes[2 * i];
/* Second byte is MSB (high order) */
int MSB = audioBytes[2 * i + 1];
audioData[i] = MSB << 8 | (255 & LSB);
}
}
} else if (format.getSampleSizeInBits() == 8) {
int nlengthInSamples = audioBytes.length;
audioData = new float[nlengthInSamples];
if (format.getEncoding().toString().startsWith("PCM_SIGN")) {
for (int i = 0; i < audioBytes.length; i++) {
audioData[i] = audioBytes[i];
}
} else {
for (int i = 0; i < audioBytes.length; i++) {
audioData[i] = audioBytes[i] - 128;
}
}
} // end of if..else
// System.out.println("PCM Returned===============" +
// audioData.length);
return audioData;
}
private void getAudioData() {
if (format.getSampleSizeInBits() == 16) {
nlengthInSamples = audioBytes.length / 2;
audioData = new int[nlengthInSamples];
if (format.isBigEndian()) {
for (int i = 0; i < nlengthInSamples; i++) {
// First byte is MSB (high order)
int MSB = (int) audioBytes[2 * i];
// Second byte is LSB (low order)
int LSB = (int) audioBytes[2 * i + 1];
audioData[i] = MSB << 8 | (255 & LSB);
}
} else {
for (int i = 0; i < nlengthInSamples; i++) {
// First byte is LSB (low order)
int LSB = (int) audioBytes[2 * i];
// Second byte is MSB (high order)
int MSB = (int) audioBytes[2 * i + 1];
audioData[i] = MSB << 8 | (255 & LSB);
}
}
} else {
if (format.getSampleSizeInBits() == 8) {
nlengthInSamples = audioBytes.length;
audioData = new int[nlengthInSamples];
if (format.getEncoding().toString().startsWith("PCM_SIGN")) {
for (int i = 0; i < audioBytes.length; i++) {
audioData[i] = audioBytes[i];
}
} else {
for (int i = 0; i < audioBytes.length; i++) {
audioData[i] = audioBytes[i] - 128;
}
}
}
}
}
/**
* Determines the single largest sample size of all channels of the current clip. This can be
* handy for determining a fraction to scal visual representations.
*
* @return Double between 0 & 1 representing the maximum signal level of any channel.
*/
public double getLargestSampleSize() {
int largest = 0;
int current;
boolean signed = (format.getEncoding() == AudioFormat.Encoding.PCM_SIGNED);
int bitDepth = format.getSampleSizeInBits();
boolean bigEndian = format.isBigEndian();
int samples = audioData.length * 8 / bitDepth;
if (signed) {
if (bitDepth / 8 == 2) {
if (bigEndian) {
for (int cc = 0; cc < samples; cc++) {
current = (audioData[cc * 2] * 256 + (audioData[cc * 2 + 1] & 0xFF));
if (Math.abs(current) > largest) {
largest = Math.abs(current);
}
}
} else {
for (int cc = 0; cc < samples; cc++) {
current = (audioData[cc * 2 + 1] * 256 + (audioData[cc * 2] & 0xFF));
if (Math.abs(current) > largest) {
largest = Math.abs(current);
}
}
}
} else {
for (int cc = 0; cc < samples; cc++) {
current = (audioData[cc] & 0xFF);
if (Math.abs(current) > largest) {
largest = Math.abs(current);
}
}
}
} else {
if (bitDepth / 8 == 2) {
if (bigEndian) {
for (int cc = 0; cc < samples; cc++) {
current = (audioData[cc * 2] * 256 + (audioData[cc * 2 + 1] - 0x80));
if (Math.abs(current) > largest) {
largest = Math.abs(current);
}
}
} else {
for (int cc = 0; cc < samples; cc++) {
current = (audioData[cc * 2 + 1] * 256 + (audioData[cc * 2] - 0x80));
if (Math.abs(current) > largest) {
largest = Math.abs(current);
}
}
}
} else {
for (int cc = 0; cc < samples; cc++) {
if (audioData[cc] > 0) {
current = (audioData[cc] - 0x80);
if (Math.abs(current) > largest) {
largest = Math.abs(current);
}
} else {
current = (audioData[cc] + 0x80);
if (Math.abs(current) > largest) {
largest = Math.abs(current);
}
}
}
}
}
// audioData
logger.log(Level.FINEST, "Max signal level: " + (double) largest / (Math.pow(2, bitDepth - 1)));
return (double) largest / (Math.pow(2, bitDepth - 1));
}
/**
* 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;
}
private InputStream getFileStream(WaveFileFormat waveFileFormat, InputStream audioStream)
throws IOException {
// private method ... assumes audioFileFormat is a supported file type
// WAVE header fields
AudioFormat audioFormat = waveFileFormat.getFormat();
int headerLength = waveFileFormat.getHeaderSize();
int riffMagic = WaveFileFormat.RIFF_MAGIC;
int waveMagic = WaveFileFormat.WAVE_MAGIC;
int fmtMagic = WaveFileFormat.FMT_MAGIC;
int fmtLength = WaveFileFormat.getFmtChunkSize(waveFileFormat.getWaveType());
short wav_type = (short) waveFileFormat.getWaveType();
short channels = (short) audioFormat.getChannels();
short sampleSizeInBits = (short) audioFormat.getSampleSizeInBits();
int sampleRate = (int) audioFormat.getSampleRate();
int frameSizeInBytes = audioFormat.getFrameSize();
int frameRate = (int) audioFormat.getFrameRate();
int avgBytesPerSec = channels * sampleSizeInBits * sampleRate / 8;
short blockAlign = (short) ((sampleSizeInBits / 8) * channels);
int dataMagic = WaveFileFormat.DATA_MAGIC;
int dataLength = waveFileFormat.getFrameLength() * frameSizeInBytes;
int length = waveFileFormat.getByteLength();
int riffLength = dataLength + headerLength - 8;
byte header[] = null;
ByteArrayInputStream headerStream = null;
ByteArrayOutputStream baos = null;
DataOutputStream dos = null;
SequenceInputStream waveStream = null;
AudioFormat audioStreamFormat = null;
AudioFormat.Encoding encoding = null;
InputStream codedAudioStream = audioStream;
// if audioStream is an AudioInputStream and we need to convert, do it here...
if (audioStream instanceof AudioInputStream) {
audioStreamFormat = ((AudioInputStream) audioStream).getFormat();
encoding = audioStreamFormat.getEncoding();
if (AudioFormat.Encoding.PCM_SIGNED.equals(encoding)) {
if (sampleSizeInBits == 8) {
wav_type = WaveFileFormat.WAVE_FORMAT_PCM;
// plug in the transcoder to convert from PCM_SIGNED to PCM_UNSIGNED
codedAudioStream =
AudioSystem.getAudioInputStream(
new AudioFormat(
AudioFormat.Encoding.PCM_UNSIGNED,
audioStreamFormat.getSampleRate(),
audioStreamFormat.getSampleSizeInBits(),
audioStreamFormat.getChannels(),
audioStreamFormat.getFrameSize(),
audioStreamFormat.getFrameRate(),
false),
(AudioInputStream) audioStream);
}
}
if ((AudioFormat.Encoding.PCM_SIGNED.equals(encoding) && audioStreamFormat.isBigEndian())
|| (AudioFormat.Encoding.PCM_UNSIGNED.equals(encoding)
&& !audioStreamFormat.isBigEndian())
|| (AudioFormat.Encoding.PCM_UNSIGNED.equals(encoding)
&& audioStreamFormat.isBigEndian())) {
if (sampleSizeInBits != 8) {
wav_type = WaveFileFormat.WAVE_FORMAT_PCM;
// plug in the transcoder to convert to PCM_SIGNED_LITTLE_ENDIAN
codedAudioStream =
AudioSystem.getAudioInputStream(
new AudioFormat(
AudioFormat.Encoding.PCM_SIGNED,
audioStreamFormat.getSampleRate(),
audioStreamFormat.getSampleSizeInBits(),
audioStreamFormat.getChannels(),
audioStreamFormat.getFrameSize(),
audioStreamFormat.getFrameRate(),
false),
(AudioInputStream) audioStream);
}
}
}
// Now push the header into a stream, concat, and return the new SequenceInputStream
baos = new ByteArrayOutputStream();
dos = new DataOutputStream(baos);
// we write in littleendian...
dos.writeInt(riffMagic);
dos.writeInt(big2little(riffLength));
dos.writeInt(waveMagic);
dos.writeInt(fmtMagic);
dos.writeInt(big2little(fmtLength));
dos.writeShort(big2littleShort(wav_type));
dos.writeShort(big2littleShort(channels));
dos.writeInt(big2little(sampleRate));
dos.writeInt(big2little(avgBytesPerSec));
dos.writeShort(big2littleShort(blockAlign));
dos.writeShort(big2littleShort(sampleSizeInBits));
// $$fb 2002-04-16: Fix for 4636355: RIFF audio headers could be _more_ spec compliant
if (wav_type != WaveFileFormat.WAVE_FORMAT_PCM) {
// add length 0 for "codec specific data length"
dos.writeShort(0);
}
dos.writeInt(dataMagic);
dos.writeInt(big2little(dataLength));
dos.close();
header = baos.toByteArray();
headerStream = new ByteArrayInputStream(header);
waveStream = new SequenceInputStream(headerStream, new NoCloseInputStream(codedAudioStream));
return waveStream;
}