Java 类android.media.audiofx.LoudnessEnhancer 实例源码

@Override
public AudioEffect create(int audioSession) {
    try {
        return new LoudnessEnhancer(audioSession);
    } catch (RuntimeException e) {
        // NOTE: some devices doesn't support LoudnessEnhancer class and may throw an exception
        // (ME176C throws IllegalArgumentException)
        Log.w(TAG, "Failed to instantiate loudness enhancer class", e);
    }
    return null;
}

public static void initLoudnessEnhancer(int audioID) {
    EndLoudnessEnhancer();
    try {
        loudnessEnhancer = new LoudnessEnhancer(audioID);
        int loud = Extras.getInstance().saveEq().getInt(LOUD_BOOST, 0);
        if (loud > 0) {
            setLoudnessEnhancerGain(loud);
        }else {
            setLoudnessEnhancerGain(0);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
}

public LoudnessEnhancerController(Context context, int audioSessionId) {
    this.context = context;
    try {
        this.audioSessionId = audioSessionId;
        enhancer = new LoudnessEnhancer(audioSessionId);
    } catch (Throwable x) {
        Log.w(TAG, "Failed to create enhancer", x);
    }
}

public LoudnessEnhancerController(Context context, int audioSessionId) {
    this.context = context;
    try {
        this.audioSessionId = audioSessionId;
        enhancer = new LoudnessEnhancer(audioSessionId);
    } catch (Throwable x) {
        Log.w(TAG, "Failed to create enhancer", x);
    }
}

@Override
public float getTargetGain(AudioEffect effect) {
    return ((LoudnessEnhancer) effect).getTargetGain();
}

@Override
public void setTargetGain(AudioEffect effect, int gainmB) {
    ((LoudnessEnhancer) effect).setTargetGain(gainmB);
}

@TargetApi(Build.VERSION_CODES.KITKAT)
public musicHandler(musicPlayer Gh) {
    mEvent = new Event("PLayer");
    this.Gh = Gh;
    loadStartup();
    mediaplayer = new MediaPlayer();
    mediaplayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
        @Override
        public void onPrepared(MediaPlayer mp) {
            if(needPlay){
                isPrepared = true;
                play(needId);
            }else{
                isPrepared = true;
                if(needStop){
                    needStop = false;
                }else{
                    mediaplayer.start();
                }
                mediaplayer.setOnCompletionListener(OC);
                mEvent.trigger(playerEvents.SONG_CHANGED);
            }
        }
    });

    needStop = true;
    playByNumber(0);

    EQs = new EqlizerSettings(Gh.getBaseContext());

    bass = new BassBoost(0, mediaplayer.getAudioSessionId());
    bass.setEnabled(true);


    equlizer = new Equalizer(0, mediaplayer.getAudioSessionId());
    equlizer.setEnabled(true);

    virtualizer = new Virtualizer(0, mediaplayer.getAudioSessionId());
    virtualizer.setEnabled(true);

    if(android.os.Build.VERSION.SDK_INT >= 19){
        loudness = new LoudnessEnhancer(  mediaplayer.getAudioSessionId());
        loudness.setEnabled(true);
    }else{
        loudness = null;
    }


    setEQs(EQs.isOn);


    setBass(EQs.BASS);
    setTrable(EQs.TRABLE);
    setVoice(EQs.VOICE);
    setVirtualizer(EQs.VIRCHULIZER);
    setLoudnessEnhancer(EQs.LOUDNESS);
    mEvent.trigger(playerEvents.EQ_CHANGED);
    mEvent.trigger(playerEvents.PLAYER_COMPLETE);

}

@SuppressLint("NewApi")
    @Override
    public void onCreate() {
        t0 = System.currentTimeMillis();
        SpeakerBoost.log("Creating service at "+t0);
        options = PreferenceManager.getDefaultSharedPreferences(this);

        settings = new Settings(this, true);
        settings.load(options);
        if (!settings.haveEqualizer()) {
            settings.boostValue = 0;
            settings.save(options);

            if (19 <= Build.VERSION.SDK_INT) {
                Boolean have = false;
                for (AudioEffect.Descriptor d : AudioEffect.queryEffects()) {
                    if (d.uuid.equals(LoudnessEnhancer.EFFECT_TYPE_LOUDNESS_ENHANCER)) {
                        have = true;
                        break;
                    }
                }
                if (!have) {
                    Toast.makeText(this,  "Your device doesn't support the LoudnessEnhancer effect that SpeakerBoost needs.", Toast.LENGTH_LONG).show();
                }
                else {
                    Toast.makeText(this, "Error: Try later or reboot", Toast.LENGTH_LONG).show();
                }
            }
            else {
                Toast.makeText(this, "Error: Try later or reboot", Toast.LENGTH_LONG).show();
            }
            SpeakerBoost.log("Error setting up equalizer");
        }
        else {
//          Toast.makeText(this, "Equalizer activated", 5000).show();
            SpeakerBoost.log("Success setting up equalizer");
        }

        if (Options.getNotify(options) != Options.NOTIFY_NEVER) {
            Notification n = new Notification(
                    R.drawable.equalizeron,
                    "SpeakerBoost", 
                    System.currentTimeMillis());
            Intent i = new Intent(this, SpeakerBoost.class);
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            n.flags = Notification.FLAG_NO_CLEAR | Notification.FLAG_ONGOING_EVENT; 
            n.setLatestEventInfo(this, "SpeakerBoost", 
                    settings.describe(), 
                    PendingIntent.getActivity(this, 0, i, 0));
            SpeakerBoost.log("notify from service "+n.toString());

            startForeground(SpeakerBoost.NOTIFICATION_ID, n);
        }
        else {          
        }

        if (settings.isEqualizerActive())
            settings.setEqualizer();
        else
            settings.disableEqualizer();

//      if (settings.override) {
//          Runnable logRunnable = new Runnable(){
//              @Override
//              public void run() {
//                  interruptReader = false;
//                  monitorLog();
//              }};  
//          logThread = new Thread(logRunnable);
//          
//          logThread.start();
//      }
    }