/* * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * 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). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.media.sound; import java.io.IOException; import java.util.Vector; import javax.sound.sampled.AudioFormat; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; /** * 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