1 /*
   2  * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.media.sound;
  27 
  28 import java.io.DataInputStream;
  29 import java.io.IOException;
  30 import java.io.InputStream;
  31 
  32 import javax.sound.sampled.AudioFileFormat;
  33 import javax.sound.sampled.spi.AudioFileWriter;
  34 
  35 /**
  36  * Abstract File Writer class.
  37  *
  38  * @author Jan Borgersen
  39  */
  40 abstract class SunFileWriter extends AudioFileWriter {
  41 
  42     // buffer size for write
  43     protected static final int bufferSize = 16384;
  44 
  45     // buffer size for temporary input streams
  46     protected static final int bisBufferSize = 4096;
  47 
  48     final AudioFileFormat.Type[] types;
  49 
  50     /**
  51      * Constructs a new SunParser object.
  52      */
  53     SunFileWriter(AudioFileFormat.Type[] types) {
  54         this.types = types;
  55     }
  56 
  57     // METHODS TO IMPLEMENT AudioFileWriter
  58 
  59     @Override
  60     public final AudioFileFormat.Type[] getAudioFileTypes(){
  61         AudioFileFormat.Type[] localArray = new AudioFileFormat.Type[types.length];
  62         System.arraycopy(types, 0, localArray, 0, types.length);
  63         return localArray;
  64     }
  65 
  66     // HELPER METHODS
  67 
  68     /**
  69      * rllong
  70      * Protected helper method to read 64 bits and changing the order of
  71      * each bytes.
  72      * @return 32 bits swapped value.
  73      * @exception IOException
  74      */
  75     final int rllong(DataInputStream dis) throws IOException {
  76 
  77         int b1, b2, b3, b4 ;
  78         int i = 0;
  79 
  80         i = dis.readInt();
  81 
  82         b1 = ( i & 0xFF ) << 24 ;
  83         b2 = ( i & 0xFF00 ) << 8;
  84         b3 = ( i & 0xFF0000 ) >> 8;
  85         b4 = ( i & 0xFF000000 ) >>> 24;
  86 
  87         i = ( b1 | b2 | b3 | b4 );
  88 
  89         return i;
  90     }
  91 
  92     /**
  93      * big2little
  94      * Protected helper method to swap the order of bytes in a 32 bit int
  95      * @return 32 bits swapped value
  96      */
  97     final int big2little(int i) {
  98 
  99         int b1, b2, b3, b4 ;
 100 
 101         b1 = ( i & 0xFF ) << 24 ;
 102         b2 = ( i & 0xFF00 ) << 8;
 103         b3 = ( i & 0xFF0000 ) >> 8;
 104         b4 = ( i & 0xFF000000 ) >>> 24;
 105 
 106         i = ( b1 | b2 | b3 | b4 );
 107 
 108         return i;
 109     }
 110 
 111     /**
 112      * rlshort
 113      * Protected helper method to read 16 bits value. Swap high with low byte.
 114      * @return the swapped value.
 115      * @exception IOException
 116      */
 117     final short rlshort(DataInputStream dis)  throws IOException {
 118 
 119         short s=0;
 120         short high, low;
 121 
 122         s = dis.readShort();
 123 
 124         high = (short)(( s & 0xFF ) << 8) ;
 125         low = (short)(( s & 0xFF00 ) >>> 8);
 126 
 127         s = (short)( high | low );
 128 
 129         return s;
 130     }
 131 
 132     /**
 133      * big2little
 134      * Protected helper method to swap the order of bytes in a 16 bit short
 135      * @return 16 bits swapped value
 136      */
 137     final short big2littleShort(short i) {
 138 
 139         short high, low;
 140 
 141         high = (short)(( i & 0xFF ) << 8) ;
 142         low = (short)(( i & 0xFF00 ) >>> 8);
 143 
 144         i = (short)( high | low );
 145 
 146         return i;
 147     }
 148 
 149     /**
 150      * InputStream wrapper class which prevent source stream from being closed.
 151      * The class is usefull for use with SequenceInputStream to prevent
 152      * closing of the source input streams.
 153      */
 154     final class NoCloseInputStream extends InputStream {
 155         private final InputStream in;
 156 
 157         NoCloseInputStream(InputStream in) {
 158             this.in = in;
 159         }
 160 
 161         @Override
 162         public int read() throws IOException {
 163             return in.read();
 164         }
 165 
 166         @Override
 167         public int read(byte[] b) throws IOException {
 168             return in.read(b);
 169         }
 170 
 171         @Override
 172         public int read(byte[] b, int off, int len) throws IOException {
 173             return in.read(b, off, len);
 174         }
 175 
 176         @Override
 177         public long skip(long n) throws IOException {
 178             return in.skip(n);
 179         }
 180 
 181         @Override
 182         public int available() throws IOException {
 183             return in.available();
 184         }
 185 
 186         @Override
 187         public void close() throws IOException {
 188             // don't propagate the call
 189         }
 190 
 191         @Override
 192         public void mark(int readlimit) {
 193             in.mark(readlimit);
 194         }
 195 
 196         @Override
 197         public void reset() throws IOException {
 198             in.reset();
 199         }
 200 
 201         @Override
 202         public boolean markSupported() {
 203             return in.markSupported();
 204         }
 205     }
 206 }