RCModulepublic class RCModule extends AudioCodec
(Omit source code)
| Fields Summary |
|---|
| private RateConversion | rateConversion | | private Format | lastInputFormat | | private Format | lastOutputFormat | | private static boolean | DEBUG |
| Constructors Summary |
|---|
public RCModule()
supportedInputFormats = new AudioFormat[] {
new AudioFormat(
AudioFormat.LINEAR,
Format.NOT_SPECIFIED,
16,
2,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
Format.NOT_SPECIFIED,
16,
1,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
Format.NOT_SPECIFIED,
8,
2,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
Format.NOT_SPECIFIED,
8,
1,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
) };
/*
supportedInputFormats = new AudioFormat[] {
new AudioFormat(
AudioFormat.LINEAR,
11025,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
11127,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
16000,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
22050,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
22254,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
22255,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
32000,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
44100,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
),
new AudioFormat(
AudioFormat.LINEAR,
48000,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED
) };
*/
defaultOutputFormats = new AudioFormat[] {
// new AudioFormat(
// AudioFormat.ULAW,
// 8000,
// 8,
// 1,
// Format.NOT_SPECIFIED,
// Format.NOT_SPECIFIED
// ),
new AudioFormat(
AudioFormat.LINEAR,
8000,
16,
2,
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED
),
new AudioFormat(
AudioFormat.LINEAR,
8000,
16,
1,
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED
)
};
PLUGIN_NAME="Rate Conversion";
|
| Methods Summary |
|---|
| public void | close()
if (null != rateConversion) {
rateConversion.close();
}
rateConversion = null;
| | protected javax.media.Format[] | getMatchingOutputFormats(javax.media.Format in)
if (!isSampleRateSupported(in)) return new Format[0];
supportedOutputFormats = new AudioFormat[] {
// new AudioFormat(
// AudioFormat.ULAW,
// 8000,
// 8,
// 1,
// Format.NOT_SPECIFIED,
// Format.NOT_SPECIFIED
// ),
new AudioFormat(
AudioFormat.LINEAR,
8000,
16,
1,
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED
),
new AudioFormat(
AudioFormat.LINEAR,
8000,
16,
2,
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED
)
};
return supportedOutputFormats;
| | private boolean | initConverter(javax.media.format.AudioFormat inFormat, javax.media.format.AudioFormat outFormat, int inputLength)
lastInputFormat=inFormat;
lastOutputFormat=outFormat;
boolean isSigned=false;
int numberOfInputChannels=inFormat.getChannels();
int numberOfOutputChannels=outFormat.getChannels();
int inputSampleSize=inFormat.getSampleSizeInBits();
int sampleRate=(int)inFormat.getSampleRate();
boolean ulawOutput=false;
if (sampleRate == 8000) {
return false;
}
int pcmType = RateConversion.RATE_CONVERSION_LITTLE_ENDIAN_FORMAT;
if (inFormat.getEndian() == AudioFormat.BIG_ENDIAN) {
pcmType = RateConversion.RATE_CONVERSION_BIG_ENDIAN_FORMAT;
}
if (8 == inputSampleSize) {
pcmType = RateConversion.RATE_CONVERSION_BYTE_FORMAT;
}
if (inFormat.getSigned()==AudioFormat.SIGNED) {
isSigned=true;
}
if (rateConversion != null) {
close();
}
if (outFormat.getEncoding()==AudioFormat.ULAW) {
ulawOutput=true;
}
rateConversion = new RateConversion();
if (RateConversion.RATE_CONVERSION_OK != rateConversion.init(inputLength,
sampleRate,
8000,
numberOfInputChannels,
numberOfOutputChannels,
pcmType,
isSigned,
ulawOutput) ) {
rateConversion = null;
return false;
}
return true;
| | private boolean | isSampleRateSupported(javax.media.Format format)
try {
int sampleRate = (int) (((AudioFormat)format).getSampleRate());
// these are the only supported rates
if ( !( (sampleRate == 11025) || (sampleRate == 11127) ||
(sampleRate == 16000) || (sampleRate == 22050) ||
(sampleRate == 22254) || (sampleRate == 22255) ||
(sampleRate == 32000) || (sampleRate == 44100) ||
(sampleRate == 48000) ) ) {
if (DEBUG) {
System.out.println("RCModule - input format sampling rate isn't supported");
}
return false; // input sampling rate doesn't match
}
}
catch (Throwable t) { // in case that the format isn't instance of AudioFormat
return false;
}
/*
int numberOfInputChannels=((AudioFormat)format).getChannels();
int inputSampleSize=((AudioFormat)format).getSampleSizeInBits();
if ( ( (numberOfInputChannels != 1) && (numberOfInputChannels != 2) ) || ( (inputSampleSize != 16) && (inputSampleSize != 8) ) ) {
System.out.println("input format doesn't match");
false; // input format doesn't match
}
*/
return true;
| | public void | open()
//System.err.println("RCModule output is " + outputFormat);
| | public int | process(javax.media.Buffer inputBuffer, javax.media.Buffer outputBuffer)
if (!checkInputBuffer(inputBuffer) ) {
return BUFFER_PROCESSED_FAILED;
}
if (isEOM(inputBuffer) ) {
propagateEOM(outputBuffer);
return BUFFER_PROCESSED_OK;
}
int inputLength = inputBuffer.getLength();
if ( (lastInputFormat != inputFormat) || (lastOutputFormat != outputFormat) ||
(rateConversion == null) ) {
if (false == initConverter((AudioFormat)inputFormat,
(AudioFormat)outputFormat,inputLength)) {
return BUFFER_PROCESSED_FAILED;
}
}
int maxOutLength = rateConversion.getMaxOutputLength(inputLength);
byte[] inputData = (byte[]) inputBuffer.getData();
byte[] outData = validateByteArraySize(outputBuffer, maxOutLength);
int outLength = rateConversion.process(inputData,inputBuffer.getOffset(),
inputLength,outData,outputBuffer.getOffset());
updateOutput(outputBuffer, outputFormat, outLength, outputBuffer.getOffset());
//System.err.println(outputBuffer.getFormat());
return BUFFER_PROCESSED_OK;
| | public void | reset()
if (null != rateConversion) {
rateConversion.reset();
}
| | public javax.media.Format | setInputFormat(javax.media.Format format)
if (!isSampleRateSupported(format)) return null;
//System.err.println("INput format is " + format);
return super.setInputFormat(format);
|
|
