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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package androidx.media.filterpacks.base;
     18 
     19 import androidx.media.filterfw.Filter;
     20 import androidx.media.filterfw.Frame;
     21 import androidx.media.filterfw.FrameType;
     22 import androidx.media.filterfw.InputPort;
     23 import androidx.media.filterfw.MffContext;
     24 import androidx.media.filterfw.OutputPort;
     25 import androidx.media.filterfw.Signature;
     26 
     27 public final class BranchFilter extends Filter {
     28 
     29     private boolean mSynchronized = true;
     30 
     31     public BranchFilter(MffContext context, String name) {
     32         super(context, name);
     33     }
     34 
     35     public BranchFilter(MffContext context, String name, boolean synced) {
     36         super(context, name);
     37         mSynchronized = synced;
     38     }
     39 
     40     @Override
     41     public Signature getSignature() {
     42         return new Signature()
     43             .addInputPort("input", Signature.PORT_REQUIRED, FrameType.any())
     44             .addInputPort("synchronized", Signature.PORT_OPTIONAL,FrameType.single(boolean.class))
     45             .disallowOtherInputs();
     46     }
     47 
     48     @Override
     49     public void onInputPortOpen(InputPort port) {
     50         if (port.getName().equals("input")) {
     51             for (OutputPort outputPort : getConnectedOutputPorts()) {
     52                 port.attachToOutputPort(outputPort);
     53             }
     54         } else if (port.getName().equals("synchronized")) {
     55             port.bindToFieldNamed("mSynchronized");
     56             port.setAutoPullEnabled(true);
     57         }
     58     }
     59 
     60     @Override
     61     protected void onOpen() {
     62         updateSynchronization();
     63     }
     64 
     65     @Override
     66     protected void onProcess() {
     67         Frame inputFrame = getConnectedInputPort("input").pullFrame();
     68         for (OutputPort outputPort : getConnectedOutputPorts()) {
     69             if (outputPort.isAvailable()) {
     70                 outputPort.pushFrame(inputFrame);
     71             }
     72         }
     73     }
     74 
     75     private void updateSynchronization() {
     76         if (mSynchronized) {
     77             for (OutputPort port : getConnectedOutputPorts()) {
     78                 port.setWaitsUntilAvailable(true);
     79             }
     80         } else {
     81             for (OutputPort port : getConnectedOutputPorts()) {
     82                 port.setWaitsUntilAvailable(false);
     83             }
     84         }
     85     }
     86 
     87 }
     88 
     89