/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
******************************************************************************/
package com.badlogic.gdx.backends.openal;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFormat.Encoding;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.TargetDataLine;
import com.badlogic.gdx.audio.AudioRecorder;
import com.badlogic.gdx.utils.GdxRuntimeException;
/** @author mzechner */
public class JavaSoundAudioRecorder implements AudioRecorder {
private TargetDataLine line;
private byte[] buffer = new byte[1024 * 4];
public JavaSoundAudioRecorder(int samplingRate, boolean isMono) {
try {
AudioFormat format = new AudioFormat(Encoding.PCM_SIGNED, samplingRate, 16, isMono ? 1 : 2, isMono ? 2 : 4,
samplingRate, false);
line = AudioSystem.getTargetDataLine(format);
line.open(format, buffer.length);
line.start();
} catch (Exception ex) {
throw new GdxRuntimeException("Error creating JavaSoundAudioRecorder.", ex);
}
}
public void read(short[] samples, int offset, int numSamples) {
if (buffer.length < numSamples * 2)
buffer = new byte[numSamples * 2];
int toRead = numSamples * 2;
int read = 0;
while (read != toRead)
read += line.read(buffer, read, toRead - read);
for (int i = 0, j = 0; i < numSamples * 2; i += 2, j++)
samples[offset + j] = (short) ((buffer[i + 1] << 8) | (buffer[i] & 0xff));
}
public void dispose() {
line.close();
}
}