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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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
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package com.sun.media.sound;

import java.util.Vector;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;
import java.lang.IllegalArgumentException;

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 javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;


AU file writer.
Author:Jan Borgersen
/** * AU file writer. * * @author Jan Borgersen */
public final class AuFileWriter extends SunFileWriter { //$$fb value for length field if length is not known public final static int UNKNOWN_SIZE=-1;
Constructs a new AuFileWriter object.
/** * Constructs a new AuFileWriter object. */
public AuFileWriter() { super(new AudioFileFormat.Type[]{AudioFileFormat.Type.AU}); } public AudioFileFormat.Type[] getAudioFileTypes(AudioInputStream stream) { AudioFileFormat.Type[] filetypes = new AudioFileFormat.Type[types.length]; System.arraycopy(types, 0, filetypes, 0, types.length); // make sure we can write this stream AudioFormat format = stream.getFormat(); AudioFormat.Encoding encoding = format.getEncoding(); if( (AudioFormat.Encoding.ALAW.equals(encoding)) || (AudioFormat.Encoding.ULAW.equals(encoding)) || (AudioFormat.Encoding.PCM_SIGNED.equals(encoding)) || (AudioFormat.Encoding.PCM_UNSIGNED.equals(encoding)) ) { return filetypes; } return new AudioFileFormat.Type[0]; } public int write(AudioInputStream stream, AudioFileFormat.Type fileType, OutputStream out) throws IOException { // we must know the total data length to calculate the file length //$$fb 2001-07-13: fix for bug 4351296: do not throw an exception //if( stream.getFrameLength() == AudioSystem.NOT_SPECIFIED ) { // throw new IOException("stream length not specified"); //} // throws IllegalArgumentException if not supported AuFileFormat auFileFormat = (AuFileFormat)getAudioFileFormat(fileType, stream); int bytesWritten = writeAuFile(stream, auFileFormat, out); return bytesWritten; } public int write(AudioInputStream stream, AudioFileFormat.Type fileType, File out) throws IOException { // throws IllegalArgumentException if not supported AuFileFormat auFileFormat = (AuFileFormat)getAudioFileFormat(fileType, stream); // first write the file without worrying about length fields FileOutputStream fos = new FileOutputStream( out ); // throws IOException BufferedOutputStream bos = new BufferedOutputStream( fos, bisBufferSize ); int bytesWritten = writeAuFile(stream, auFileFormat, bos ); bos.close(); // now, if length fields were not specified, calculate them, // open as a random access file, write the appropriate fields, // close again.... if( auFileFormat.getByteLength()== AudioSystem.NOT_SPECIFIED ) { // $$kk: 10.22.99: jan: please either implement this or throw an exception! // $$fb: 2001-07-13: done. Fixes Bug 4479981 RandomAccessFile raf=new RandomAccessFile(out, "rw"); if (raf.length()<=0x7FFFFFFFl) { // skip AU magic and data offset field raf.skipBytes(8); raf.writeInt(bytesWritten-AuFileFormat.AU_HEADERSIZE); // that's all } raf.close(); } return bytesWritten; } // -------------------------------------------------------------
Returns the AudioFileFormat describing the file that will be written from this AudioInputStream. Throws IllegalArgumentException if not supported.
/** * Returns the AudioFileFormat describing the file that will be written from this AudioInputStream. * Throws IllegalArgumentException if not supported. */
private AudioFileFormat getAudioFileFormat(AudioFileFormat.Type type, AudioInputStream stream) { AudioFormat format = null; AuFileFormat fileFormat = null; AudioFormat.Encoding encoding = AudioFormat.Encoding.PCM_SIGNED; AudioFormat streamFormat = stream.getFormat(); AudioFormat.Encoding streamEncoding = streamFormat.getEncoding(); float sampleRate; int sampleSizeInBits; int channels; int frameSize; float frameRate; 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)) ) { encoding = streamEncoding; sampleSizeInBits = streamFormat.getSampleSizeInBits(); } else if ( streamFormat.getSampleSizeInBits()==8 ) { encoding = AudioFormat.Encoding.PCM_SIGNED; sampleSizeInBits=8; } else { encoding = AudioFormat.Encoding.PCM_SIGNED; sampleSizeInBits=streamFormat.getSampleSizeInBits(); } format = new AudioFormat( encoding, streamFormat.getSampleRate(), sampleSizeInBits, streamFormat.getChannels(), streamFormat.getFrameSize(), streamFormat.getFrameRate(), true); // AU is always big endian if( stream.getFrameLength()!=AudioSystem.NOT_SPECIFIED ) { fileSize = (int)stream.getFrameLength()*streamFormat.getFrameSize() + AuFileFormat.AU_HEADERSIZE; } else { fileSize = AudioSystem.NOT_SPECIFIED; } fileFormat = new AuFileFormat( AudioFileFormat.Type.AU, fileSize, format, (int)stream.getFrameLength() ); return fileFormat; } private InputStream getFileStream(AuFileFormat auFileFormat, InputStream audioStream) throws IOException { // private method ... assumes auFileFormat is a supported file type AudioFormat format = auFileFormat.getFormat(); int magic = AuFileFormat.AU_SUN_MAGIC; int headerSize = AuFileFormat.AU_HEADERSIZE; long dataSize = auFileFormat.getFrameLength(); //$$fb fix for Bug 4351296 //int dataSizeInBytes = dataSize * format.getFrameSize(); long dataSizeInBytes = (dataSize==AudioSystem.NOT_SPECIFIED)?UNKNOWN_SIZE:dataSize * format.getFrameSize(); if (dataSizeInBytes>0x7FFFFFFFl) { dataSizeInBytes=UNKNOWN_SIZE; } int encoding_local = auFileFormat.getAuType(); int sampleRate = (int)format.getSampleRate(); int channels = format.getChannels(); //$$fb below is the fix for 4297100. //boolean bigendian = format.isBigEndian(); boolean bigendian = true; // force bigendian byte header[] = null; ByteArrayInputStream headerStream = null; ByteArrayOutputStream baos = null; DataOutputStream dos = null; SequenceInputStream auStream = null; AudioFormat audioStreamFormat = null; AudioFormat.Encoding encoding = null; InputStream codedAudioStream = audioStream; // if we need to do any format conversion, do it here. codedAudioStream = audioStream; if( audioStream instanceof AudioInputStream ) { audioStreamFormat = ((AudioInputStream)audioStream).getFormat(); encoding = audioStreamFormat.getEncoding(); //$$ fb 2001-07-13: Bug 4391108 if( (AudioFormat.Encoding.PCM_UNSIGNED.equals(encoding)) || (AudioFormat.Encoding.PCM_SIGNED.equals(encoding) && bigendian != audioStreamFormat.isBigEndian()) ) { // plug in the transcoder to convert to PCM_SIGNED, bigendian // NOTE: little endian AU is not common, so we're always converting // to big endian unless the passed in audioFileFormat is little. // $$fb this NOTE is superseded. We always write big endian au files, this is by far the standard. codedAudioStream = AudioSystem.getAudioInputStream( new AudioFormat ( AudioFormat.Encoding.PCM_SIGNED, audioStreamFormat.getSampleRate(), audioStreamFormat.getSampleSizeInBits(), audioStreamFormat.getChannels(), audioStreamFormat.getFrameSize(), audioStreamFormat.getFrameRate(), bigendian), (AudioInputStream)audioStream ); } } baos = new ByteArrayOutputStream(); dos = new DataOutputStream(baos); if (bigendian) { dos.writeInt(AuFileFormat.AU_SUN_MAGIC); dos.writeInt(headerSize); dos.writeInt((int)dataSizeInBytes); dos.writeInt(encoding_local); dos.writeInt(sampleRate); dos.writeInt(channels); } else { dos.writeInt(AuFileFormat.AU_SUN_INV_MAGIC); dos.writeInt(big2little(headerSize)); dos.writeInt(big2little((int)dataSizeInBytes)); dos.writeInt(big2little(encoding_local)); dos.writeInt(big2little(sampleRate)); dos.writeInt(big2little(channels)); } // Now create a new InputStream from headerStream and the InputStream // in audioStream dos.close(); header = baos.toByteArray(); headerStream = new ByteArrayInputStream( header ); auStream = new SequenceInputStream(headerStream,codedAudioStream); return auStream; } private int writeAuFile(InputStream in, AuFileFormat auFileFormat, OutputStream out) throws IOException { int bytesRead = 0; int bytesWritten = 0; InputStream fileStream = getFileStream(auFileFormat, in); byte buffer[] = new byte[bisBufferSize]; int maxLength = auFileFormat.getByteLength(); while( (bytesRead = fileStream.read( buffer )) >= 0 ) { if (maxLength>0) { if( bytesRead < maxLength ) { out.write( buffer, 0, (int)bytesRead ); bytesWritten += bytesRead; maxLength -= bytesRead; } else { out.write( buffer, 0, (int)maxLength ); bytesWritten += maxLength; maxLength = 0; break; } } else { out.write( buffer, 0, (int)bytesRead ); bytesWritten += bytesRead; } } return bytesWritten; } }