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Copy pathAudioBuffer.java
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104 lines (89 loc) · 3.75 KB
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/*
* Copyright (c) 2017 STMicroelectronics – All rights reserved
* The STMicroelectronics corporate logo is a trademark of STMicroelectronics
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions
* and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name nor trademarks of STMicroelectronics International N.V. nor any other
* STMicroelectronics company nor the names of its contributors may be used to endorse or
* promote products derived from this software without specific prior written permission.
*
* - All of the icons, pictures, logos and other images that are provided with the source code
* in a directory whose title begins with st_images may only be used for internal purposes and
* shall not be redistributed to any third party or modified in any way.
*
* - Any redistributions in binary form shall not include the capability to display any of the
* icons, pictures, logos and other images that are provided with the source code in a directory
* whose title begins with st_images.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
package com.st.BlueMS.demos.Audio.Utils;
import android.media.AudioTrack;
import java.io.IOException;
import java.io.OutputStream;
/**
* Class containing an audio buffer
*/
public class AudioBuffer {
private int mSamplingRate;
private short mData[];
private int mLastWriteData;
public AudioBuffer(int samplingRate, int maxLengthSec){
mSamplingRate=samplingRate;
mData = new short[samplingRate*maxLengthSec];
mLastWriteData=0;
}
public AudioBuffer(short[] sampleData){
mData=sampleData;
mLastWriteData = sampleData.length;
}
public short[] getData() {
return mData;
}
public int getSamplingRate() {
return mSamplingRate;
}
public int append(short data[]){
synchronized (this) {
int size = Math.min(mData.length - mLastWriteData, data.length);
System.arraycopy(data, 0, mData, mLastWriteData, size);
mLastWriteData += size;
return mLastWriteData;
}
}
public boolean isFull() {
return mData.length==mLastWriteData;
}
public int getBufferLength() {
return mData.length;
}
public void writeLittleEndianTo(OutputStream out) throws IOException {
synchronized (this) {
for (int i = 0; i < mLastWriteData; i++) {
short temp = mData[i];
out.write(temp & 0x00FF);
out.write(temp >> 8);
}
}
}
synchronized public void writeTo(AudioTrack out){
out.write(mData,0,mLastWriteData);
}
}