Save This Page
Home » openjdk-7 » com.sun.media » sound » [javadoc | source]
    1   /*
    2    * Copyright (c) 2007, 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   package com.sun.media.sound;
   26   
   27   import java.io.ByteArrayInputStream;
   28   import java.io.File;
   29   import java.io.IOException;
   30   import java.io.InputStream;
   31   import java.net.URL;
   32   
   33   import javax.sound.sampled.AudioFormat;
   34   import javax.sound.sampled.AudioInputStream;
   35   import javax.sound.sampled.AudioSystem;
   36   import javax.sound.sampled.UnsupportedAudioFileException;
   37   
   38   /**
   39    * This class is used to create AudioFloatInputStream from AudioInputStream and
   40    * byte buffers.
   41    *
   42    * @author Karl Helgason
   43    */
   44   public abstract class AudioFloatInputStream {
   45   
   46       private static class BytaArrayAudioFloatInputStream
   47               extends AudioFloatInputStream {
   48   
   49           private int pos = 0;
   50           private int markpos = 0;
   51           private AudioFloatConverter converter;
   52           private AudioFormat format;
   53           private byte[] buffer;
   54           private int buffer_offset;
   55           private int buffer_len;
   56           private int framesize_pc;
   57   
   58           public BytaArrayAudioFloatInputStream(AudioFloatConverter converter,
   59                   byte[] buffer, int offset, int len) {
   60               this.converter = converter;
   61               this.format = converter.getFormat();
   62               this.buffer = buffer;
   63               this.buffer_offset = offset;
   64               framesize_pc = format.getFrameSize() / format.getChannels();
   65               this.buffer_len = len / framesize_pc;
   66   
   67           }
   68   
   69           public AudioFormat getFormat() {
   70               return format;
   71           }
   72   
   73           public long getFrameLength() {
   74               return buffer_len;// / format.getFrameSize();
   75           }
   76   
   77           public int read(float[] b, int off, int len) throws IOException {
   78               if (b == null)
   79                   throw new NullPointerException();
   80               if (off < 0 || len < 0 || len > b.length - off)
   81                   throw new IndexOutOfBoundsException();
   82               if (pos >= buffer_len)
   83                   return -1;
   84               if (len == 0)
   85                   return 0;
   86               if (pos + len > buffer_len)
   87                   len = buffer_len - pos;
   88               converter.toFloatArray(buffer, buffer_offset + pos * framesize_pc,
   89                       b, off, len);
   90               pos += len;
   91               return len;
   92           }
   93   
   94           public long skip(long len) throws IOException {
   95               if (pos >= buffer_len)
   96                   return -1;
   97               if (len <= 0)
   98                   return 0;
   99               if (pos + len > buffer_len)
  100                   len = buffer_len - pos;
  101               pos += len;
  102               return len;
  103           }
  104   
  105           public int available() throws IOException {
  106               return buffer_len - pos;
  107           }
  108   
  109           public void close() throws IOException {
  110           }
  111   
  112           public void mark(int readlimit) {
  113               markpos = pos;
  114           }
  115   
  116           public boolean markSupported() {
  117               return true;
  118           }
  119   
  120           public void reset() throws IOException {
  121               pos = markpos;
  122           }
  123       }
  124   
  125       private static class DirectAudioFloatInputStream
  126               extends AudioFloatInputStream {
  127   
  128           private AudioInputStream stream;
  129           private AudioFloatConverter converter;
  130           private int framesize_pc; // framesize / channels
  131           private byte[] buffer;
  132   
  133           public DirectAudioFloatInputStream(AudioInputStream stream) {
  134               converter = AudioFloatConverter.getConverter(stream.getFormat());
  135               if (converter == null) {
  136                   AudioFormat format = stream.getFormat();
  137                   AudioFormat newformat;
  138   
  139                   AudioFormat[] formats = AudioSystem.getTargetFormats(
  140                           AudioFormat.Encoding.PCM_SIGNED, format);
  141                   if (formats.length != 0) {
  142                       newformat = formats[0];
  143                   } else {
  144                       float samplerate = format.getSampleRate();
  145                       int samplesizeinbits = format.getSampleSizeInBits();
  146                       int framesize = format.getFrameSize();
  147                       float framerate = format.getFrameRate();
  148                       samplesizeinbits = 16;
  149                       framesize = format.getChannels() * (samplesizeinbits / 8);
  150                       framerate = samplerate;
  151   
  152                       newformat = new AudioFormat(
  153                               AudioFormat.Encoding.PCM_SIGNED, samplerate,
  154                               samplesizeinbits, format.getChannels(), framesize,
  155                               framerate, false);
  156                   }
  157   
  158                   stream = AudioSystem.getAudioInputStream(newformat, stream);
  159                   converter = AudioFloatConverter.getConverter(stream.getFormat());
  160               }
  161               framesize_pc = stream.getFormat().getFrameSize()
  162                       / stream.getFormat().getChannels();
  163               this.stream = stream;
  164           }
  165   
  166           public AudioFormat getFormat() {
  167               return stream.getFormat();
  168           }
  169   
  170           public long getFrameLength() {
  171               return stream.getFrameLength();
  172           }
  173   
  174           public int read(float[] b, int off, int len) throws IOException {
  175               int b_len = len * framesize_pc;
  176               if (buffer == null || buffer.length < b_len)
  177                   buffer = new byte[b_len];
  178               int ret = stream.read(buffer, 0, b_len);
  179               if (ret == -1)
  180                   return -1;
  181               converter.toFloatArray(buffer, b, off, ret / framesize_pc);
  182               return ret / framesize_pc;
  183           }
  184   
  185           public long skip(long len) throws IOException {
  186               long b_len = len * framesize_pc;
  187               long ret = stream.skip(b_len);
  188               if (ret == -1)
  189                   return -1;
  190               return ret / framesize_pc;
  191           }
  192   
  193           public int available() throws IOException {
  194               return stream.available() / framesize_pc;
  195           }
  196   
  197           public void close() throws IOException {
  198               stream.close();
  199           }
  200   
  201           public void mark(int readlimit) {
  202               stream.mark(readlimit * framesize_pc);
  203           }
  204   
  205           public boolean markSupported() {
  206               return stream.markSupported();
  207           }
  208   
  209           public void reset() throws IOException {
  210               stream.reset();
  211           }
  212       }
  213   
  214       public static AudioFloatInputStream getInputStream(URL url)
  215               throws UnsupportedAudioFileException, IOException {
  216           return new DirectAudioFloatInputStream(AudioSystem
  217                   .getAudioInputStream(url));
  218       }
  219   
  220       public static AudioFloatInputStream getInputStream(File file)
  221               throws UnsupportedAudioFileException, IOException {
  222           return new DirectAudioFloatInputStream(AudioSystem
  223                   .getAudioInputStream(file));
  224       }
  225   
  226       public static AudioFloatInputStream getInputStream(InputStream stream)
  227               throws UnsupportedAudioFileException, IOException {
  228           return new DirectAudioFloatInputStream(AudioSystem
  229                   .getAudioInputStream(stream));
  230       }
  231   
  232       public static AudioFloatInputStream getInputStream(
  233               AudioInputStream stream) {
  234           return new DirectAudioFloatInputStream(stream);
  235       }
  236   
  237       public static AudioFloatInputStream getInputStream(AudioFormat format,
  238               byte[] buffer, int offset, int len) {
  239           AudioFloatConverter converter = AudioFloatConverter
  240                   .getConverter(format);
  241           if (converter != null)
  242               return new BytaArrayAudioFloatInputStream(converter, buffer,
  243                       offset, len);
  244   
  245           InputStream stream = new ByteArrayInputStream(buffer, offset, len);
  246           long aLen = format.getFrameSize() == AudioSystem.NOT_SPECIFIED
  247                   ? AudioSystem.NOT_SPECIFIED : len / format.getFrameSize();
  248           AudioInputStream astream = new AudioInputStream(stream, format, aLen);
  249           return getInputStream(astream);
  250       }
  251   
  252       public abstract AudioFormat getFormat();
  253   
  254       public abstract long getFrameLength();
  255   
  256       public abstract int read(float[] b, int off, int len) throws IOException;
  257   
  258       public int read(float[] b) throws IOException {
  259           return read(b, 0, b.length);
  260       }
  261   
  262       public float read() throws IOException {
  263           float[] b = new float[1];
  264           int ret = read(b, 0, 1);
  265           if (ret == -1 || ret == 0)
  266               return 0;
  267           return b[0];
  268       }
  269   
  270       public abstract long skip(long len) throws IOException;
  271   
  272       public abstract int available() throws IOException;
  273   
  274       public abstract void close() throws IOException;
  275   
  276       public abstract void mark(int readlimit);
  277   
  278       public abstract boolean markSupported();
  279   
  280       public abstract void reset() throws IOException;
  281   }

Save This Page
Home » openjdk-7 » com.sun.media » sound » [javadoc | source]