NativeEncoderpublic class NativeEncoder extends AudioCodec
| Fields Summary |
|---|
| private int | nativeData | | protected int | INSIZE | | protected int | OUTSIZE | | byte[] | encData | | int | encDataLen | | BitRateControl | bra | | Control[] | controls | | boolean | settingsChanged | | private int | numFramesPerOutputBuffer | | private int | numFramesInBuffer | | private int | outOffset | | static Hashtable | bitRateTable |
| Constructors Summary |
|---|
public NativeEncoder()
bitRateTable.put(new Integer(32000), new Integer(48000));
bitRateTable.put(new Integer(44100), new Integer(64000));
bitRateTable.put(new Integer(48000), new Integer(64000));
bitRateTable.put(new Integer(16000), new Integer(24000));
bitRateTable.put(new Integer(22050), new Integer(32000));
bitRateTable.put(new Integer(24000), new Integer(32000));
inputFormats = new Format[] {
/*
- crashes the VM. Disables for 2.1.1 beta.
new AudioFormat(AudioFormat.LINEAR,
16000.,
16,
Format.NOT_SPECIFIED,
Arch.isBigEndian()?
AudioFormat.BIG_ENDIAN :
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED),
*/
new AudioFormat(AudioFormat.LINEAR,
22050.,
16,
Format.NOT_SPECIFIED,
Arch.isBigEndian()?
AudioFormat.BIG_ENDIAN :
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED),
new AudioFormat(AudioFormat.LINEAR,
24000.,
16,
Format.NOT_SPECIFIED,
Arch.isBigEndian()?
AudioFormat.BIG_ENDIAN :
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED),
/*
- The decoder weren't able to handle the data generated.
Probably buggy data. Disables for 2.1.1 beta.
new AudioFormat(AudioFormat.LINEAR,
32000.,
16,
Format.NOT_SPECIFIED,
Arch.isBigEndian()?
AudioFormat.BIG_ENDIAN :
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED),
*/
new AudioFormat(AudioFormat.LINEAR,
44100.,
16,
Format.NOT_SPECIFIED,
Arch.isBigEndian()?
AudioFormat.BIG_ENDIAN :
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED),
new AudioFormat(AudioFormat.LINEAR,
48000.,
16,
Format.NOT_SPECIFIED,
Arch.isBigEndian()?
AudioFormat.BIG_ENDIAN :
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED),
};
outputFormats = new Format[] {
/* Disabling MP3 encoding
new AudioFormat(AudioFormat.MPEGLAYER3,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
AudioFormat.BIG_ENDIAN,
Format.NOT_SPECIFIED),
*/
new AudioFormat(AudioFormat.MPEG,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
AudioFormat.BIG_ENDIAN,
Format.NOT_SPECIFIED),
};
bra = new BitRateControl(this, 64000, 24000, 128000);
|
| Methods Summary |
|---|
| public synchronized void | close()
if (nativeData != 0) {
nClose(nativeData);
nativeData = 0;
}
| | private int | computeBitRate(int sampleRate, int channels)
Object o = bitRateTable.get(new Integer(sampleRate));
int bitRate;
if (o != null) {
bitRate = ((Integer)o).intValue();
bitRate *= channels;
} else {
bitRate = 64000; // Default bitrate
}
return bitRate;
| | public int | getBitRate()
return bra.getBitRate();
| | public java.lang.Object[] | getControls()
if (controls == null) {
controls = new Control[1];
controls[0] = bra;
}
return (Object[])controls;
| | public java.lang.String | getName()
return "MPEG Layer 2 Encoder";
| | public javax.media.Format[] | getSupportedOutputFormats(javax.media.Format input)
if (input == null) {
return outputFormats;
} else if (input instanceof AudioFormat) {
AudioFormat af = (AudioFormat) input;
Format outputs[] = new Format[] {
/* Disabling MP3 encoding
new AudioFormat (AudioFormat.MPEGLAYER3,
af.getSampleRate(),
af.getSampleSizeInBits(),
af.getChannels(),
AudioFormat.BIG_ENDIAN,
AudioFormat.SIGNED),
*/
new AudioFormat (AudioFormat.MPEG,
af.getSampleRate(),
af.getSampleSizeInBits(),
af.getChannels(),
AudioFormat.BIG_ENDIAN,
AudioFormat.SIGNED),
};
return outputs;
}
return new Format[0];
| | public int | isLayer3()
/* Disabling MP3
if (outputFormat != null &&
outputFormat.getEncoding().equalsIgnoreCase(AudioFormat.MPEGLAYER3)) {
return 1;
} else {
return 0;
}
*/
return 0;
| | public native boolean | nClose(int instance)
| | public native int | nConvert(int instance, byte[] inBuf, int inOffset, int inLen, byte[] outBuf, int outOffset)
| | public native int | nFlush(int instance, byte[] outBuf)
| | public native int | nOpen(javax.media.format.AudioFormat format)
| | public synchronized void | open()
if (nativeData != 0)
close();
try {
JMFSecurityManager.loadLibrary("jmutil");
JMFSecurityManager.loadLibrary("jmmpa");
nativeData = nOpen((AudioFormat)outputFormat);
if (nativeData == 0) {
throw new ResourceUnavailableException("could not open " + getName());
}
encData = new byte[INSIZE*numFramesPerOutputBuffer];
return;
} catch (Throwable e) {
}
throw new ResourceUnavailableException("could not open " + getName());
| | public synchronized int | process(javax.media.Buffer in, javax.media.Buffer out)
if (isEOM(in)) {
int len = nFlush(nativeData, (byte [])out.getData());
if (len > 0) {
out.setOffset(0);
out.setLength(len);
} else
out.setLength(0);
out.setFormat(outputFormat);
out.setEOM(true);
if (settingsChanged) {
reset();
settingsChanged = false;
}
return BUFFER_PROCESSED_OK;
}
if (!(in.getData() instanceof byte[])) {
return BUFFER_PROCESSED_FAILED;
}
int inOffset = in.getOffset();
int inLength = in.getLength();
byte inData[] = (byte[])in.getData();
byte outData[] = (byte[])out.getData();
// Check the output buffer size.
if (outData == null || outData.length < (OUTSIZE*numFramesPerOutputBuffer)) {
outData = new byte[OUTSIZE*numFramesPerOutputBuffer];
out.setData(outData);
}
int rtn = 0;
if (nativeData != 0) {
//System.err.println("inOffset = " + inOffset);
while ((encDataLen < INSIZE*numFramesPerOutputBuffer) &&
(inOffset < inLength)) {
encData[encDataLen] = inData[inOffset];
inOffset++;
encDataLen++;
}
//System.err.println("inOffset = " + inOffset + " encDataLen = " + encDataLen + " inLength = " + inLength);
if (encDataLen >= INSIZE*numFramesPerOutputBuffer) {
// We have enough samples to encode.
for (int i = 0; i < numFramesPerOutputBuffer; i++) {
int returnVal =
nConvert(nativeData, (byte[])encData,
(INSIZE*i), ////// inOffset,
INSIZE, (byte[])out.getData(), outOffset);
if (returnVal < 0) {
return BUFFER_PROCESSED_FAILED;
}
numFramesInBuffer++;
outOffset += returnVal;
}
encDataLen = 0;
numFramesInBuffer = 0;
if (outOffset == 0) {
rtn |= OUTPUT_BUFFER_NOT_FILLED;
} else {
out.setOffset(0);
out.setLength(outOffset);
out.setFormat(outputFormat);
outOffset = 0;
}
} else {
// We are not done with the output buffer.
rtn |= OUTPUT_BUFFER_NOT_FILLED;
}
}
if (inOffset < inLength) {
// We are not done with the input buffer.
in.setOffset(inOffset);
rtn |= INPUT_BUFFER_NOT_CONSUMED;
}
if (rtn == BUFFER_PROCESSED_OK && settingsChanged) {
reset();
settingsChanged = false;
}
return rtn;
| | public synchronized void | reset()
if (nativeData != 0) {
close();
try {
open();
} catch (ResourceUnavailableException rue) {
System.err.println("MP2 Encoder: " + rue);
}
}
| | public javax.media.Format | setOutputFormat(javax.media.Format format)
if (matches(format, getSupportedOutputFormats(inputFormat)) == null)
return null;
if (!(format instanceof AudioFormat))
return null;
AudioFormat in = (AudioFormat) format;
double sampleRate = in.getSampleRate();
int channels = in.getChannels();
int bitRate = computeBitRate((int) sampleRate, channels);
bra.setBitRate(bitRate);
outputFormat = new AudioFormat(
in.getEncoding(),
sampleRate,
in.getSampleSizeInBits(),
channels,
in.getEndian(),
in.getSigned(),
8, // in.getFrameSizeInBits(),
getBitRate() / 8,// in.getFrameRate(),
in.getDataType()
);
return outputFormat;
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