[android-developers] How to sense the amplitude of mic while recording with audiorecord in android ?
i am recording the sound with audiorecord in
android and at the same time i want to get notified about the amplitude of
the input voice I want to send peak values at interval of times as input
to my service . Is it possible .
Also wanted to know how to get notified when audio
file is finished while playing the media file with audiotrack.
I
Here is my code
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.media.MediaRecorder;
import android.util.Log;
import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
*
* @author Dany
*/
public class RecordSystem {
private boolean isRecording;
private String fileLocation;
public RecordSystem(String fileLocation) {
this.fileLocation = fileLocation;
}
public void stopRecord() {
isRecording = false;
}
public void startRecord() {
isRecording = true;
int frequency = 11025;
int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_STEREO;
int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
File file = new File(fileLocation);
// delete any previous recording
if (file.exists()) {
file.delete();
}
// create the new file on SD
try {
file.createNewFile();
} catch (IOException e) {
throw new IllegalStateException(Failed to create
+ file.toString());
}
try {
// create a DataOuputStream to write the audio data into the
saved
// file
OutputStream os = new FileOutputStream(file);
BufferedOutputStream bos = new BufferedOutputStream(os);
DataOutputStream dos = new DataOutputStream(bos);
int bufferSize = AudioRecord.getMinBufferSize(frequency,
channelConfiguration, audioEncoding);
// create a new AudioRecord object to record the audio
// uses the permission 'android.permission.RECORD_AUDIO' in the
// manifest
AudioRecord audioRecord = new AudioRecord(
MediaRecorder.AudioSource.MIC, frequency,
channelConfiguration, audioEncoding, bufferSize);
short[] buffer = new short[bufferSize];
audioRecord.startRecording();
while (isRecording) {
// grab the buffered input (mic) and write it to a file on
the
// SD
int bufferReadResult = audioRecord.read(buffer, 0,
bufferSize);
for (int i = 0; i bufferReadResult; i++) {
dos.writeShort(buffer[i]);
Log.i(result,+bufferReadResult);
}
}
audioRecord.stop();
audioRecord.release();
dos.flush();
dos.close();
} catch (Throwable t) {
Log.e(AudioRecord, Recording Failed);
}
}
}
/
package com.news.sample;
import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import android.media.AudioFormat;
import android.media.AudioManager;
import android.media.AudioRecord;
import android.media.AudioTrack;
import android.util.Log;
public class PlaySystem {
private boolean isPlaying;
private String fileLocation;
public PlaySystem(String fileLocation) {
this.fileLocation = fileLocation;
}
public void stopPlay() {
isPlaying = false;
}
public void startPlay(int playFrequency) {
isPlaying = true;
int frequency = 11025;
int channelConfiguration = AudioFormat.CHANNEL_CONFIGURATION_MONO;
int audioEncoding = AudioFormat.ENCODING_PCM_16BIT;
File file = new File(fileLocation);
try {
InputStream is = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(is);
DataInputStream dis = new DataInputStream(bis);
int bufferSize = AudioRecord.getMinBufferSize(frequency,
channelConfiguration, audioEncoding);
// initialize an audiotrack with a different frequency then
// originally used for the recording
// this wil automatically manipulate the 'pitch' of the sound
AudioTrack audioTrack = new
AudioTrack(AudioManager.STREAM_MUSIC,
playFrequency, channelConfiguration, audioEncoding,
bufferSize, AudioTrack.MODE_STREAM);
// start playback
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