/*
* Copyright (c) 2007 - 2008 by Damien Di Fede <ddf@compartmental.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package ddf.minim.javasound;
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.SourceDataLine;
import org.tritonus.share.sampled.AudioSystemShadow;
import org.tritonus.share.sampled.AudioUtils;
import org.tritonus.share.sampled.file.AudioOutputStream;
import ddf.minim.Minim;
import ddf.minim.spi.AudioRecordingStream;
import ddf.minim.spi.SampleRecorder;
/**
* JSStreamingSampleRecorder using the Tritonus AudioOutputStream class to stream audio
* directly to disk. The limitation of this approach is that the file format and
* the file name must be known before recording begins because the file must be
* created. The advantage is that you do not incur the overhead of an in-memory
* buffer and saving will not cause your sketch to hang because all the audio is
* already on disk and all that must be done is closing the file. Unlike
* JSBufferedSampleRecorder, specifying the file format upon saving will do nothing and
* you cannot easily save your recorded audio to multiple formats. There are
* also fewer formats available to save in, limiting you to AIFF, AU, and WAV.
*
* @author Damien Di Fede
*
*/
final class JSStreamingSampleRecorder implements SampleRecorder
{
// output stream representing the file being written to
private AudioOutputStream aos;
// float sample buffer used for converting float samples to bytes
private FloatSampleBuffer fsb;
private String name;
private AudioFileFormat.Type type;
private AudioFormat format;
private boolean recording;
private JSMinim system;
/**
*
* @param fileName
* @param fileType
* @param fileFormat
*/
JSStreamingSampleRecorder(JSMinim sys,
String fileName,
AudioFileFormat.Type fileType,
AudioFormat fileFormat,
int bufferSize)
{
name = fileName;
type = fileType;
format = fileFormat;
system = sys;
try
{
aos = AudioSystemShadow.getAudioOutputStream( type, format,
AudioSystem.NOT_SPECIFIED,
new File(name) );
}
catch (IOException e)
{
system.error("Error obtaining new output stream: " + e.getMessage());
}
catch (IllegalArgumentException badarg)
{
system.error("Error obtaining new output stream for " + fileName + " with type "
+ type.toString() + " format " + format.toString()
+ " and bufferSize " + bufferSize + ".\n"
+ "The reason is " + badarg.getMessage());
}
fsb = new FloatSampleBuffer(format.getChannels(),
bufferSize,
format.getSampleRate());
recording = false;
}
public String filePath()
{
return name;
}
public void beginRecord()
{
recording = true;
}
public void endRecord()
{
recording = false;
}
public boolean isRecording()
{
return recording;
}
/**
* Finishes the recording process by closing the file.
*/
public AudioRecordingStream save()
{
try
{
aos.close();
}
catch (IOException e)
{
Minim.error("AudioRecorder.save: An error occurred when trying to save the file:\n"
+ e.getMessage());
}
String filePath = filePath();
AudioInputStream ais = system.getAudioInputStream(filePath);
SourceDataLine sdl = system.getSourceDataLine(ais.getFormat(), 1024);
// this is fine because the recording will always be
// in a raw format (WAV, AU, etc).
long length = AudioUtils.frames2Millis(ais.getFrameLength(), format);
BasicMetaData meta = new BasicMetaData(filePath, length, ais.getFrameLength());
JSPCMAudioRecordingStream recording = new JSPCMAudioRecordingStream(system, meta, ais, sdl, 1024);
return recording;
}
public void samples(float[] samp)
{
if ( recording )
{
System.arraycopy(samp, 0, fsb.getChannel(0), 0, samp.length);
byte[] raw = fsb.convertToByteArray(format);
try
{
aos.write(raw, 0, raw.length);
}
catch (IOException e)
{
Minim.error("AudioRecorder: An error occurred while trying to write to the file:\n" +
e.getMessage() );
}
}
}
public void samples(float[] sampL, float[] sampR)
{
if ( recording )
{
System.arraycopy(sampL, 0, fsb.getChannel(0), 0, sampL.length);
System.arraycopy(sampR, 0, fsb.getChannel(1), 0, sampR.length);
byte[] raw = fsb.convertToByteArray(format);
try
{
aos.write(raw, 0, raw.length);
}
catch (IOException e)
{
Minim.error("AudioRecorder: An error occurred while trying to write to the file:\n" +
e.getMessage() );
}
}
}
}