我想检测黑哨的声音。对于我已实施 HTTP：//$c$c.google.com/p/musicg /

I want to detect 'Whistle' sound. For that I have implemented http://code.google.com/p/musicg/

来源$ C ​​$ C本身有问题。当你启动应用程序，它已经准备好倾听，但是当你回过头去再重新启动检测器线程不会引发啸叫检测。

Source code itself having issue. When you start app it is ready for listen but when you go back and again restart detector thread it does not trigger whistle detection.

DetectorThread.java

DetectorThread.java

package weetech.wallpaper.services;

import java.util.LinkedList;

import weetech.wallpaper.utils.Debug;
import android.media.AudioFormat;
import android.media.AudioRecord;

import com.musicg.api.WhistleApi;
import com.musicg.wave.WaveHeader;

public class DetectorThread extends Thread {

private RecorderThread recorder;
private WaveHeader waveHeader;
private WhistleApi whistleApi;
private Thread _thread;

private LinkedList<Boolean> whistleResultList = new LinkedList<Boolean>();
private int numWhistles;
private int totalWhistlesDetected = 0;
private int whistleCheckLength = 3;
private int whistlePassScore = 3;

public DetectorThread(RecorderThread recorder) {
    this.recorder = recorder;
    AudioRecord audioRecord = recorder.getAudioRecord();

    int bitsPerSample = 0;
    if (audioRecord.getAudioFormat() == AudioFormat.ENCODING_PCM_16BIT) {
        bitsPerSample = 16;
    } else if (audioRecord.getAudioFormat() == AudioFormat.ENCODING_PCM_8BIT) {
        bitsPerSample = 8;
    }

    int channel = 0;
    // whistle detection only supports mono channel
    if (audioRecord.getChannelConfiguration() == AudioFormat.CHANNEL_IN_MONO) {
        channel = 1;
    }

    waveHeader = new WaveHeader();
    waveHeader.setChannels(channel);
    waveHeader.setBitsPerSample(bitsPerSample);
    waveHeader.setSampleRate(audioRecord.getSampleRate());
    whistleApi = new WhistleApi(waveHeader);
}

private void initBuffer() {
    numWhistles = 0;
    whistleResultList.clear();

    // init the first frames
    for (int i = 0; i < whistleCheckLength; i++) {
        whistleResultList.add(false);
    }
    // end init the first frames
}

public void start() {
    _thread = new Thread(this);
    _thread.start();
}

public void stopDetection() {
    _thread = null;
}

@Override
public void run() {
    Debug.e("", "DetectorThread started...");

    try {
        byte[] buffer;
        initBuffer();

        Thread thisThread = Thread.currentThread();
        while (_thread == thisThread) {
            // detect sound
            buffer = recorder.getFrameBytes();

            // audio analyst
            if (buffer != null) {
                // sound detected
                // MainActivity.whistleValue = numWhistles;

                // whistle detection
                // System.out.println("*Whistle:");

                try {
                    boolean isWhistle = whistleApi.isWhistle(buffer);
                    Debug.e("", "isWhistle : " + isWhistle + " "
                            + buffer.length);

                    if (whistleResultList.getFirst()) {
                        numWhistles--;
                    }

                    whistleResultList.removeFirst();
                    whistleResultList.add(isWhistle);

                    if (isWhistle) {
                        numWhistles++;
                    }

                    // Debug.e("", "numWhistles : " + numWhistles);

                    if (numWhistles >= whistlePassScore) {
                        // clear buffer
                        initBuffer();
                        totalWhistlesDetected++;

                        Debug.e("", "totalWhistlesDetected : "
                                + totalWhistlesDetected);

                        if (onWhistleListener != null) {
                            onWhistleListener.onWhistle();
                        }
                    }
                } catch (Exception e) {
                    Debug.w("", "" + e.getCause());
                }
                // end whistle detection
            } else {
                // Debug.e("", "no sound detected");
                // no sound detected
                if (whistleResultList.getFirst()) {
                    numWhistles--;
                }
                whistleResultList.removeFirst();
                whistleResultList.add(false);

                // MainActivity.whistleValue = numWhistles;
            }
            // end audio analyst
        }

        Debug.e("", "Terminating detector thread...");

    } catch (Exception e) {
        e.printStackTrace();
    }
}

private OnWhistleListener onWhistleListener;

public void setOnWhistleListener(OnWhistleListener onWhistleListener) {
    this.onWhistleListener = onWhistleListener;
}

public interface OnWhistleListener {
    void onWhistle();
}

public int getTotalWhistlesDetected() {
    return totalWhistlesDetected;
}
}

RecorderThread.java

RecorderThread.java

public class RecorderThread {

private AudioRecord audioRecord;
private int channelConfiguration;
private int audioEncoding;
private int sampleRate;
private int frameByteSize; // for 1024 fft size (16bit sample size)
byte[] buffer;

public RecorderThread() {
    sampleRate = 44100;
    frameByteSize = 1024 * 2;

    channelConfiguration = AudioFormat.CHANNEL_IN_MONO;
    audioEncoding = AudioFormat.ENCODING_PCM_16BIT;

    int recBufSize = AudioRecord.getMinBufferSize(sampleRate,
            channelConfiguration, audioEncoding); // need to be larger than
                                                    // size of a frame
    audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
            sampleRate, channelConfiguration, audioEncoding, recBufSize);
    buffer = new byte[frameByteSize];
}

public AudioRecord getAudioRecord() {
    return audioRecord;
}

public boolean isRecording() {
    if (audioRecord.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) {
        return true;
    }

    return false;
}

public void startRecording() {
    try {
        audioRecord.startRecording();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public void stopRecording() {
    try {
        audioRecord.stop();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public byte[] getFrameBytes() {
    audioRecord.read(buffer, 0, frameByteSize);

    // analyze sound
    int totalAbsValue = 0;
    short sample = 0;
    float averageAbsValue = 0.0f;

    for (int i = 0; i < frameByteSize; i += 2) {
        sample = (short) ((buffer[i]) | buffer[i + 1] << 8);
        totalAbsValue += Math.abs(sample);
    }
    averageAbsValue = totalAbsValue / frameByteSize / 2;

    Debug.e("", "averageAbsValue : " + averageAbsValue);

    // no input
    if (averageAbsValue < 30) {
       return null;
    }

    return buffer;
}

}

用法

   public class DetectionService extends Service implements
    OnWhistleListener {

Handler handler;
private DetectorThread detectorThread;
private RecorderThread recorderThread;

@Override
public void onCreate() {
    super.onCreate();
    handler = new Handler();

}

@Override
public IBinder onBind(Intent intent) {
    return null;
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    try {
        if (intent != null && intent.getExtras() != null) {

            if (intent.getExtras().containsKey("action")) {
                Debug.e("", "action : " + intent.getStringExtra("action"));

                if (intent.getStringExtra("action").equals("start")) {
                    startWhistleDetection();
                }

                if (intent.getStringExtra("action").equals("stop")) {
                    stopWhistleDetection();
                    stopSelf();
                }
            }
        } else {

            startWhistleDetection();
            Debug.e("", "intent is null OR intent.getExtras() is null");
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return super.onStartCommand(intent, flags, startId);
}

private void startWhistleDetection() {

    try {
        stopWhistleDetection();
    } catch (Exception e) {
        e.printStackTrace();
    }

    recorderThread = new RecorderThread();
    recorderThread.startRecording();
    detectorThread = new DetectorThread(recorderThread);
    detectorThread.setOnWhistleListener(this);
    detectorThread.start();

}

private void stopWhistleDetection() {
    if (detectorThread != null) {
        detectorThread.stopDetection();
        detectorThread.setOnWhistleListener(null);
        detectorThread = null;
    }

    if (recorderThread != null) {
        recorderThread.stopRecording();
        recorderThread = null;
    }

}

@Override
public void onDestroy() {
    super.onDestroy();
}

@Override
public void onWhistle() {
    Debug.e("", "onWhistle()");
}

据检测哨第一次，直到你不停止服务。但是，停止和重新开始它不会检测后（不调用监听器）。我只是没能跟踪，什么都可以的问题。

It detects whistle first time untill you don't stop service. But after stopping and again starting It does not detect (Does not call listener). I just failed to trace, what can be issue.

是否与记录任何问题？ 任何人都可以试图？是否有任何其他的API是吗？

Is there any issue with recording?? Can anyone has tried? Is there any other API is there?

帮助！谢谢

推荐答案

我投资6小时：当它停止ð难以置信，录音机不会被释放。我刚刚发布停药后记录。

I invested 6 hours, :D Unbelievable, audio recorder is not released when it is stopped. I just released recorder after stopping.

来源$ C ​​$ C是有轻微的愚蠢的错误。它不释放记录。

Source code is having minor silly mistake. It is not releasing recorder.

public void stopRecording() {
    try {
        audioRecord.stop();
        audioRecord.release();

    } catch (Exception e) {
        e.printStackTrace();
    }
}