/**
* 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;
}
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;
}
}
/**
* 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;
}
