8064800: AudioSystem/WaveFileWriter can't write PCM_FLOAT, but writes it anyway
authorserb
Thu, 07 Jan 2016 23:50:00 +0300
changeset 35686 1c21a27682a5
parent 35685 f405bbd07cc6
child 35687 78e8e8fea09b
8064800: AudioSystem/WaveFileWriter can't write PCM_FLOAT, but writes it anyway Reviewed-by: prr, amenkov
jdk/src/java.desktop/share/classes/META-INF/services/javax.sound.sampled.spi.AudioFileWriter
jdk/src/java.desktop/share/classes/com/sun/media/sound/AiffFileWriter.java
jdk/src/java.desktop/share/classes/com/sun/media/sound/AuFileWriter.java
jdk/src/java.desktop/share/classes/com/sun/media/sound/WaveFileWriter.java
jdk/src/java.desktop/share/classes/com/sun/media/sound/WaveFloatFileWriter.java
jdk/src/java.desktop/share/classes/javax/sound/sampled/AudioSystem.java
jdk/test/javax/sound/sampled/spi/AudioFileWriter/WriteUnsupportedAudioFormat.java
--- a/jdk/src/java.desktop/share/classes/META-INF/services/javax.sound.sampled.spi.AudioFileWriter	Tue Jan 12 23:33:45 2016 +0300
+++ b/jdk/src/java.desktop/share/classes/META-INF/services/javax.sound.sampled.spi.AudioFileWriter	Thu Jan 07 23:50:00 2016 +0300
@@ -2,3 +2,4 @@
 com.sun.media.sound.AuFileWriter
 com.sun.media.sound.AiffFileWriter
 com.sun.media.sound.WaveFileWriter
+com.sun.media.sound.WaveFloatFileWriter
--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/AiffFileWriter.java	Tue Jan 12 23:33:45 2016 +0300
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/AiffFileWriter.java	Thu Jan 07 23:50:00 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, 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
@@ -25,23 +25,22 @@
 
 package com.sun.media.sound;
 
+import java.io.BufferedOutputStream;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
 import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.io.IOException;
-
-import java.io.BufferedOutputStream;
-import java.io.DataOutputStream;
-import java.io.FileOutputStream;
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.RandomAccessFile;
 import java.io.SequenceInputStream;
 import java.util.Objects;
 
 import javax.sound.sampled.AudioFileFormat;
+import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioInputStream;
-import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioSystem;
 
 //$$fb this class is buggy. Should be replaced in future.
@@ -63,6 +62,7 @@
 
     // METHODS TO IMPLEMENT AudioFileWriter
 
+    @Override
     public AudioFileFormat.Type[] getAudioFileTypes(AudioInputStream stream) {
 
         AudioFileFormat.Type[] filetypes = new AudioFileFormat.Type[types.length];
@@ -84,6 +84,7 @@
     }
 
 
+    @Override
     public int write(AudioInputStream stream, AudioFileFormat.Type fileType, OutputStream out) throws IOException {
         Objects.requireNonNull(stream);
         Objects.requireNonNull(fileType);
@@ -106,6 +107,7 @@
     }
 
 
+    @Override
     public int write(AudioInputStream stream, AudioFileFormat.Type fileType, File out) throws IOException {
         Objects.requireNonNull(stream);
         Objects.requireNonNull(fileType);
@@ -160,6 +162,9 @@
      * Throws IllegalArgumentException if not supported.
      */
     private AudioFileFormat getAudioFileFormat(AudioFileFormat.Type type, AudioInputStream stream) {
+        if (!isFileTypeSupported(type, stream)) {
+            throw new IllegalArgumentException("File type " + type + " not supported.");
+        }
 
         AudioFormat format = null;
         AiffFileFormat fileFormat = null;
@@ -177,10 +182,6 @@
         int fileSize;
         boolean convert8to16 = false;
 
-        if( !types[0].equals(type) ) {
-            throw new IllegalArgumentException("File type " + type + " not supported.");
-        }
-
         if( (AudioFormat.Encoding.ALAW.equals(streamEncoding)) ||
             (AudioFormat.Encoding.ULAW.equals(streamEncoding)) ) {
 
--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/AuFileWriter.java	Tue Jan 12 23:33:45 2016 +0300
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/AuFileWriter.java	Thu Jan 07 23:50:00 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, 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
@@ -142,6 +142,9 @@
      * Throws IllegalArgumentException if not supported.
      */
     private AudioFileFormat getAudioFileFormat(AudioFileFormat.Type type, AudioInputStream stream) {
+        if (!isFileTypeSupported(type, stream)) {
+            throw new IllegalArgumentException("File type " + type + " not supported.");
+        }
 
         AudioFormat format = null;
         AuFileFormat fileFormat = null;
@@ -154,10 +157,6 @@
         int sampleSizeInBits;
         int fileSize;
 
-        if( !types[0].equals(type) ) {
-            throw new IllegalArgumentException("File type " + type + " not supported.");
-        }
-
         if( (AudioFormat.Encoding.ALAW.equals(streamEncoding)) ||
             (AudioFormat.Encoding.ULAW.equals(streamEncoding)) ) {
 
--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/WaveFileWriter.java	Tue Jan 12 23:33:45 2016 +0300
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/WaveFileWriter.java	Thu Jan 07 23:50:00 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, 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
@@ -25,23 +25,22 @@
 
 package com.sun.media.sound;
 
+import java.io.BufferedOutputStream;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
 import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.io.IOException;
-
-import java.io.BufferedOutputStream;
-import java.io.DataOutputStream;
-import java.io.FileOutputStream;
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
 import java.io.RandomAccessFile;
 import java.io.SequenceInputStream;
 import java.util.Objects;
 
 import javax.sound.sampled.AudioFileFormat;
+import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioInputStream;
-import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioSystem;
 
 //$$fb this class is buggy. Should be replaced in future.
@@ -85,6 +84,7 @@
     // METHODS TO IMPLEMENT AudioFileWriter
 
 
+    @Override
     public AudioFileFormat.Type[] getAudioFileTypes(AudioInputStream stream) {
 
         AudioFileFormat.Type[] filetypes = new AudioFileFormat.Type[types.length];
@@ -106,6 +106,7 @@
     }
 
 
+    @Override
     public int write(AudioInputStream stream, AudioFileFormat.Type fileType, OutputStream out) throws IOException {
         Objects.requireNonNull(stream);
         Objects.requireNonNull(fileType);
@@ -130,6 +131,7 @@
     }
 
 
+    @Override
     public int write(AudioInputStream stream, AudioFileFormat.Type fileType, File out) throws IOException {
         Objects.requireNonNull(stream);
         Objects.requireNonNull(fileType);
@@ -173,6 +175,9 @@
      * Throws IllegalArgumentException if not supported.
      */
     private AudioFileFormat getAudioFileFormat(AudioFileFormat.Type type, AudioInputStream stream) {
+        if (!isFileTypeSupported(type, stream)) {
+            throw new IllegalArgumentException("File type " + type + " not supported.");
+        }
         AudioFormat format = null;
         WaveFileFormat fileFormat = null;
         AudioFormat.Encoding encoding = AudioFormat.Encoding.PCM_SIGNED;
@@ -187,9 +192,6 @@
         float frameRate;
         int fileSize;
 
-        if (!types[0].equals(type)) {
-            throw new IllegalArgumentException("File type " + type + " not supported.");
-        }
         int waveType = WaveFileFormat.WAVE_FORMAT_PCM;
 
         if( AudioFormat.Encoding.ALAW.equals(streamEncoding) ||
--- a/jdk/src/java.desktop/share/classes/com/sun/media/sound/WaveFloatFileWriter.java	Tue Jan 12 23:33:45 2016 +0300
+++ b/jdk/src/java.desktop/share/classes/com/sun/media/sound/WaveFloatFileWriter.java	Thu Jan 07 23:50:00 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2016, 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
@@ -22,18 +22,20 @@
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
+
 package com.sun.media.sound;
 
 import java.io.File;
 import java.io.IOException;
 import java.io.OutputStream;
+import java.util.Objects;
 
 import javax.sound.sampled.AudioFileFormat;
+import javax.sound.sampled.AudioFileFormat.Type;
 import javax.sound.sampled.AudioFormat;
 import javax.sound.sampled.AudioFormat.Encoding;
 import javax.sound.sampled.AudioInputStream;
 import javax.sound.sampled.AudioSystem;
-import javax.sound.sampled.AudioFileFormat.Type;
 import javax.sound.sampled.spi.AudioFileWriter;
 
 /**
@@ -43,10 +45,12 @@
  */
 public final class WaveFloatFileWriter extends AudioFileWriter {
 
+    @Override
     public Type[] getAudioFileTypes() {
-        return new Type[] { Type.WAVE };
+        return new Type[]{Type.WAVE};
     }
 
+    @Override
     public Type[] getAudioFileTypes(AudioInputStream stream) {
 
         if (!stream.getFormat().getEncoding().equals(Encoding.PCM_FLOAT))
@@ -92,18 +96,22 @@
             this.out = out;
         }
 
+        @Override
         public void write(int b) throws IOException {
             out.write(b);
         }
 
+        @Override
         public void flush() throws IOException {
             out.flush();
         }
 
+        @Override
         public void write(byte[] b, int off, int len) throws IOException {
             out.write(b, off, len);
         }
 
+        @Override
         public void write(byte[] b) throws IOException {
             out.write(b);
         }
@@ -118,8 +126,12 @@
         return AudioSystem.getAudioInputStream(targetFormat, ais);
     }
 
+    @Override
     public int write(AudioInputStream stream, Type fileType, OutputStream out)
             throws IOException {
+        Objects.requireNonNull(stream);
+        Objects.requireNonNull(fileType);
+        Objects.requireNonNull(out);
 
         checkFormat(fileType, stream);
         if (stream.getFormat().isBigEndian())
@@ -131,8 +143,13 @@
         return fpointer;
     }
 
+    @Override
     public int write(AudioInputStream stream, Type fileType, File out)
             throws IOException {
+        Objects.requireNonNull(stream);
+        Objects.requireNonNull(fileType);
+        Objects.requireNonNull(out);
+
         checkFormat(fileType, stream);
         if (stream.getFormat().isBigEndian())
             stream = toLittleEndian(stream);
@@ -142,5 +159,4 @@
         writer.close();
         return fpointer;
     }
-
 }
--- a/jdk/src/java.desktop/share/classes/javax/sound/sampled/AudioSystem.java	Tue Jan 12 23:33:45 2016 +0300
+++ b/jdk/src/java.desktop/share/classes/javax/sound/sampled/AudioSystem.java	Thu Jan 07 23:50:00 2016 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2016, 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
@@ -1187,32 +1187,24 @@
      * @see #isFileTypeSupported
      * @see #getAudioFileTypes
      */
-    public static int write(AudioInputStream stream, AudioFileFormat.Type fileType,
-                            OutputStream out) throws IOException {
+    public static int write(final AudioInputStream stream,
+                            final AudioFileFormat.Type fileType,
+                            final OutputStream out) throws IOException {
         Objects.requireNonNull(stream);
         Objects.requireNonNull(fileType);
         Objects.requireNonNull(out);
 
-        List<AudioFileWriter> providers = getAudioFileWriters();
-        int bytesWritten = 0;
-        boolean flag = false;
-
-        for(int i=0; i < providers.size(); i++) {
-            AudioFileWriter writer = providers.get(i);
+        for (final AudioFileWriter writer : getAudioFileWriters()) {
             try {
-                bytesWritten = writer.write( stream, fileType, out ); // throws IOException
-                flag = true;
-                break;
-            } catch (IllegalArgumentException e) {
-                // thrown if this provider cannot write the sequence, try the next
-                continue;
+                return writer.write(stream, fileType, out);
+            } catch (final IllegalArgumentException ignored) {
+                // thrown if this provider cannot write the stream, try next
             }
         }
-        if(!flag) {
-            throw new IllegalArgumentException("could not write audio file: file type not supported: " + fileType);
-        } else {
-            return bytesWritten;
-        }
+        // "File type " + type + " not supported."
+        throw new IllegalArgumentException(
+                "could not write audio file: file type not supported: "
+                        + fileType);
     }
 
     /**
@@ -1232,32 +1224,23 @@
      * @see #isFileTypeSupported
      * @see #getAudioFileTypes
      */
-    public static int write(AudioInputStream stream, AudioFileFormat.Type fileType,
-                            File out) throws IOException {
+    public static int write(final AudioInputStream stream,
+                            final AudioFileFormat.Type fileType,
+                            final File out) throws IOException {
         Objects.requireNonNull(stream);
         Objects.requireNonNull(fileType);
         Objects.requireNonNull(out);
 
-        List<AudioFileWriter> providers = getAudioFileWriters();
-        int bytesWritten = 0;
-        boolean flag = false;
-
-        for(int i=0; i < providers.size(); i++) {
-            AudioFileWriter writer = providers.get(i);
+        for (final AudioFileWriter writer : getAudioFileWriters()) {
             try {
-                bytesWritten = writer.write( stream, fileType, out ); // throws IOException
-                flag = true;
-                break;
-            } catch (IllegalArgumentException e) {
-                // thrown if this provider cannot write the sequence, try the next
-                continue;
+                return writer.write(stream, fileType, out);
+            } catch (final IllegalArgumentException ignored) {
+                // thrown if this provider cannot write the stream, try next
             }
         }
-        if (!flag) {
-            throw new IllegalArgumentException("could not write audio file: file type not supported: " + fileType);
-        } else {
-            return bytesWritten;
-        }
+        throw new IllegalArgumentException(
+                "could not write audio file: file type not supported: "
+                        + fileType);
     }
 
     // METHODS FOR INTERNAL IMPLEMENTATION USE
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/javax/sound/sampled/spi/AudioFileWriter/WriteUnsupportedAudioFormat.java	Thu Jan 07 23:50:00 2016 +0300
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2016, 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.
+ *
+ * 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.
+ */
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.sound.sampled.AudioFileFormat;
+import javax.sound.sampled.AudioFileFormat.Type;
+import javax.sound.sampled.AudioFormat;
+import javax.sound.sampled.AudioInputStream;
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.spi.AudioFileWriter;
+
+import static java.util.ServiceLoader.load;
+import static javax.sound.sampled.AudioFileFormat.Type.AIFC;
+import static javax.sound.sampled.AudioFileFormat.Type.AIFF;
+import static javax.sound.sampled.AudioFileFormat.Type.AU;
+import static javax.sound.sampled.AudioFileFormat.Type.SND;
+import static javax.sound.sampled.AudioFileFormat.Type.WAVE;
+
+/**
+ * @test
+ * @bug 8064800
+ */
+public final class WriteUnsupportedAudioFormat {
+
+    /**
+     * We will try to use all formats, in this case all our providers will be
+     * covered by supported/unsupported formats.
+     */
+    private static final List<AudioFormat> formats = new ArrayList<>(23000);
+
+    private static final AudioFormat.Encoding[] encodings = {
+            AudioFormat.Encoding.ALAW, AudioFormat.Encoding.ULAW,
+            AudioFormat.Encoding.PCM_SIGNED, AudioFormat.Encoding.PCM_UNSIGNED,
+            AudioFormat.Encoding.PCM_FLOAT, new AudioFormat.Encoding("Test")
+    };
+
+    private static final int[] sampleRates = {
+            /*AudioSystem.NOT_SPECIFIED,*/ 8000, 11025, 16000, 22050, 32000,
+            37800, 44056, 44100, 47250, 48000, 50000, 50400, 88200, 96000,
+            176400, 192000, 352800, 2822400, 5644800
+    };
+
+    private static final int[] sampleBits = {
+            /*AudioSystem.NOT_SPECIFIED, 4,*/ 8,/* 11,*/ 16/*, 20*/, 24,
+            32/*, 48, 64, 128*/
+    };
+
+    public static final int BUFFER_LEN = 127;
+
+    private static final int[] channels = {
+            /*AudioSystem.NOT_SPECIFIED,*/ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
+    };
+
+    static final Type[] types = {
+            WAVE, AU, AIFF, AIFC, SND, new Type("TestName", "TestExt")
+    };
+
+    private static final File FILE;
+
+    static {
+        try {
+            FILE = File.createTempFile("sound", null);
+        } catch (final IOException e) {
+            throw new RuntimeException(e);
+        }
+        FILE.deleteOnExit();
+
+        for (final Boolean end : new boolean[]{false, true}) {
+            for (final int sampleSize : sampleBits) {
+                for (final int sampleRate : sampleRates) {
+                    for (final int channel : channels) {
+                        for (final AudioFormat.Encoding enc : encodings) {
+
+                            if (enc.equals(AudioFormat.Encoding.PCM_FLOAT)
+                                    && sampleSize != 32) {
+                                continue;
+                            }
+                            if (enc.equals(AudioFormat.Encoding.ALAW)
+                                    && sampleSize != 8) {
+                                continue;
+                            }
+                            if (enc.equals(AudioFormat.Encoding.ULAW)
+                                    && sampleSize != 8) {
+                                continue;
+                            }
+
+                            final int frameSize = ((sampleSize + 7) / 8)
+                                    * channel;
+                            formats.add(
+                                    new AudioFormat(enc, sampleRate, sampleSize,
+                                                    channel, frameSize,
+                                                    sampleRate, end));
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    public static void main(final String[] args) throws Exception {
+        for (final AudioFileFormat.Type type : types) {
+            for (final AudioFormat format : formats) {
+                testAS(type, format);
+                for (final AudioFileWriter afw : load(AudioFileWriter.class)) {
+                    testAFW(afw, type, format);
+                }
+            }
+        }
+    }
+
+    /**
+     * Tests the part of AudioSystem API, which implemented via AudioFileWriter.
+     */
+    private static void testAS(final AudioFileFormat.Type type,
+                               final AudioFormat format) throws Exception {
+        final AudioInputStream ais = getStream(format);
+        final OutputStream buffer = new ByteArrayOutputStream(BUFFER_LEN);
+
+        if (AudioSystem.isFileTypeSupported(type, ais)) {
+            if (!AudioSystem.isFileTypeSupported(type)) {
+                throw new RuntimeException(type + ", " + format);
+            }
+            try {
+                AudioSystem.write(ais, type, buffer);
+                AudioSystem.write(ais, type, FILE);
+            } catch (final IllegalArgumentException e) {
+                throw new RuntimeException(type + ", " + format, e);
+            }
+        } else {
+            try {
+                AudioSystem.write(ais, type, buffer);
+                throw new RuntimeException(type + ", " + format);
+            } catch (final IllegalArgumentException ignored) {
+            }
+            try {
+                AudioSystem.write(ais, type, FILE);
+                throw new RuntimeException(type + ", " + format);
+            } catch (final IllegalArgumentException ignored) {
+            }
+        }
+    }
+
+    /**
+     * Tests the AudioFileWriter API directly.
+     */
+    private static void testAFW(final AudioFileWriter afw,
+                                final AudioFileFormat.Type type,
+                                final AudioFormat format) throws Exception {
+        final AudioInputStream ais = getStream(format);
+        final OutputStream buffer = new ByteArrayOutputStream(BUFFER_LEN);
+
+        if (afw.isFileTypeSupported(type, ais)) {
+            if (!afw.isFileTypeSupported(type)) {
+                throw new RuntimeException(type + "," + format + ',' + afw);
+            }
+            try {
+                afw.write(ais, type, buffer);
+                afw.write(ais, type, FILE);
+            } catch (final IllegalArgumentException e) {
+                throw new RuntimeException(type + "," + format + ',' + afw, e);
+            }
+        } else {
+            try {
+                afw.write(ais, type, buffer);
+                throw new RuntimeException(type + "," + format + ',' + afw);
+            } catch (final IllegalArgumentException ignored) {
+            }
+            try {
+                afw.write(ais, type, FILE);
+                throw new RuntimeException(type + "," + format + ',' + afw);
+            } catch (final IllegalArgumentException ignored) {
+            }
+        }
+    }
+
+    private static AudioInputStream getStream(final AudioFormat format) {
+        final InputStream in = new ByteArrayInputStream(new byte[BUFFER_LEN]);
+        return new AudioInputStream(in, format, 10);
+    }
+}