74 lines
2.0 KiB
Java
74 lines
2.0 KiB
Java
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* 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.android.messaging.ui.mediapicker;
|
|
|
|
import com.google.common.base.Preconditions;
|
|
|
|
import javax.annotation.concurrent.ThreadSafe;
|
|
|
|
/**
|
|
* Keeps track of the speech level as last observed by the recognition
|
|
* engine as microphone data flows through it. Can be polled by the UI to
|
|
* animate its views.
|
|
*/
|
|
@ThreadSafe
|
|
public class AudioLevelSource {
|
|
private volatile int mSpeechLevel;
|
|
private volatile Listener mListener;
|
|
|
|
public static final int LEVEL_UNKNOWN = -1;
|
|
|
|
public interface Listener {
|
|
void onSpeechLevel(int speechLevel);
|
|
}
|
|
|
|
public void setSpeechLevel(int speechLevel) {
|
|
Preconditions.checkArgument(speechLevel >= 0 && speechLevel <= 100 ||
|
|
speechLevel == LEVEL_UNKNOWN);
|
|
mSpeechLevel = speechLevel;
|
|
maybeNotify();
|
|
}
|
|
|
|
public int getSpeechLevel() {
|
|
return mSpeechLevel;
|
|
}
|
|
|
|
public void reset() {
|
|
setSpeechLevel(LEVEL_UNKNOWN);
|
|
}
|
|
|
|
public boolean isValid() {
|
|
return mSpeechLevel > 0;
|
|
}
|
|
|
|
private void maybeNotify() {
|
|
final Listener l = mListener;
|
|
if (l != null) {
|
|
l.onSpeechLevel(mSpeechLevel);
|
|
}
|
|
}
|
|
|
|
public synchronized void setListener(Listener listener) {
|
|
mListener = listener;
|
|
}
|
|
|
|
public synchronized void clearListener(Listener listener) {
|
|
if (mListener == listener) {
|
|
mListener = null;
|
|
}
|
|
}
|
|
}
|