com.sun.media.sound.PCMtoPCMCodec Maven / Gradle / Ivy
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.sun.media.sound;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import java.io.IOException;
import java.util.Vector;
/**
* Converts among signed/unsigned and little/big endianness of sampled.
*
* @author Jan Borgersen
*/
public final class PCMtoPCMCodec extends SunCodec {
private static final AudioFormat.Encoding[] inputEncodings = {
AudioFormat.Encoding.PCM_SIGNED,
AudioFormat.Encoding.PCM_UNSIGNED,
};
private static final AudioFormat.Encoding[] outputEncodings = {
AudioFormat.Encoding.PCM_SIGNED,
AudioFormat.Encoding.PCM_UNSIGNED,
};
private static final int tempBufferSize = 64;
private byte tempBuffer [] = null;
/**
* Constructs a new PCMtoPCM codec object.
*/
public PCMtoPCMCodec() {
super( inputEncodings, outputEncodings);
}
// NEW CODE
/**
*/
public AudioFormat.Encoding[] getTargetEncodings(AudioFormat sourceFormat){
if( sourceFormat.getEncoding().equals( AudioFormat.Encoding.PCM_SIGNED ) ||
sourceFormat.getEncoding().equals( AudioFormat.Encoding.PCM_UNSIGNED ) ) {
AudioFormat.Encoding encs[] = new AudioFormat.Encoding[2];
encs[0] = AudioFormat.Encoding.PCM_SIGNED;
encs[1] = AudioFormat.Encoding.PCM_UNSIGNED;
return encs;
} else {
return new AudioFormat.Encoding[0];
}
}
/**
*/
public AudioFormat[] getTargetFormats(AudioFormat.Encoding targetEncoding, AudioFormat sourceFormat){
// filter out targetEncoding from the old getOutputFormats( sourceFormat ) method
AudioFormat[] formats = getOutputFormats( sourceFormat );
Vector newFormats = new Vector();
for(int i=0; i= 0) ? (byte)(0x80 | tempbyte) : (byte)(0x7F & tempbyte);
temp = (int) tempbyte & 0xf;
return temp;
} else {
// $$jb: what to return here?
throw new IOException("cannot read a single byte if frame size > 1");
}
} else {
throw new IOException("cannot read a single byte if frame size > 1");
}
}
public int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
public int read(byte[] b, int off, int len) throws IOException {
int i;
// don't read fractional frames
if ( len%frameSize != 0 ) {
len -= (len%frameSize);
}
// don't read past our own set length
if( (frameLength!=AudioSystem.NOT_SPECIFIED) && ( (len/frameSize) >(frameLength-framePos)) ) {
len = (int)(frameLength-framePos) * frameSize;
}
int readCount = super.read(b, off, len);
byte tempByte;
if(readCount<0) { // EOF or error
return readCount;
}
// now do the conversions
switch( conversionType ) {
case PCM_SWITCH_SIGNED_8BIT:
switchSigned8bit(b,off,len,readCount);
break;
case PCM_SWITCH_ENDIAN:
switchEndian(b,off,len,readCount);
break;
case PCM_SWITCH_SIGNED_LE:
switchSignedLE(b,off,len,readCount);
break;
case PCM_SWITCH_SIGNED_BE:
switchSignedBE(b,off,len,readCount);
break;
case PCM_UNSIGNED_LE2SIGNED_BE:
case PCM_SIGNED_LE2UNSIGNED_BE:
switchSignedLE(b,off,len,readCount);
switchEndian(b,off,len,readCount);
break;
case PCM_UNSIGNED_BE2SIGNED_LE:
case PCM_SIGNED_BE2UNSIGNED_LE:
switchSignedBE(b,off,len,readCount);
switchEndian(b,off,len,readCount);
break;
default:
// do nothing
}
// we've done the conversion, just return the readCount
return readCount;
}
private void switchSigned8bit(byte[] b, int off, int len, int readCount) {
for(int i=off; i < (off+readCount); i++) {
b[i] = (b[i] >= 0) ? (byte)(0x80 | b[i]) : (byte)(0x7F & b[i]);
}
}
private void switchSignedBE(byte[] b, int off, int len, int readCount) {
for(int i=off; i < (off+readCount); i+= sampleSizeInBytes ) {
b[i] = (b[i] >= 0) ? (byte)(0x80 | b[i]) : (byte)(0x7F & b[i]);
}
}
private void switchSignedLE(byte[] b, int off, int len, int readCount) {
for(int i=(off+sampleSizeInBytes-1); i < (off+readCount); i+= sampleSizeInBytes ) {
b[i] = (b[i] >= 0) ? (byte)(0x80 | b[i]) : (byte)(0x7F & b[i]);
}
}
private void switchEndian(byte[] b, int off, int len, int readCount) {
if(sampleSizeInBytes == 2) {
for(int i=off; i < (off+readCount); i += sampleSizeInBytes ) {
byte temp;
temp = b[i];
b[i] = b[i+1];
b[i+1] = temp;
}
}
}
} // end class PCMtoPCMCodecStream
} // end class PCMtoPCMCodec
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