| /* |
| * Copyright (C) 2011 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 androidx.media.filterpacks.base; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| |
| import androidx.media.filterfw.*; |
| |
| public final class ValueTarget extends Filter { |
| |
| public static interface ValueListener { |
| public void onReceivedValue(Object value); |
| } |
| |
| private ValueListener mListener = null; |
| private Handler mHandler = null; |
| |
| public ValueTarget(MffContext context, String name) { |
| super(context, name); |
| } |
| |
| public void setListener(ValueListener listener, boolean onCallerThread) { |
| if (isRunning()) { |
| throw new IllegalStateException("Attempting to bind filter to callback while it is " |
| + "running!"); |
| } |
| mListener = listener; |
| if (onCallerThread) { |
| if (Looper.myLooper() == null) { |
| throw new IllegalArgumentException("Attempting to set callback on thread which " |
| + "has no looper!"); |
| } |
| mHandler = new Handler(); |
| } |
| } |
| |
| @Override |
| public Signature getSignature() { |
| return new Signature() |
| .addInputPort("value", Signature.PORT_REQUIRED, FrameType.single()) |
| .disallowOtherPorts(); |
| } |
| |
| @Override |
| protected void onProcess() { |
| FrameValue valueFrame = getConnectedInputPort("value").pullFrame().asFrameValue(); |
| if (mListener != null) { |
| if (mHandler != null) { |
| postValueToUiThread(valueFrame.getValue()); |
| } else { |
| mListener.onReceivedValue(valueFrame.getValue()); |
| } |
| } |
| } |
| |
| private void postValueToUiThread(final Object value) { |
| mHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| mListener.onReceivedValue(value); |
| } |
| }); |
| } |
| |
| } |
| |