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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 
     18 package android.filterpacks.base;
     19 
     20 import android.filterfw.core.Filter;
     21 import android.filterfw.core.FilterContext;
     22 import android.filterfw.core.Frame;
     23 import android.filterfw.core.FrameFormat;
     24 import android.filterfw.core.GenerateFinalPort;
     25 import android.filterfw.core.MutableFrameFormat;
     26 
     27 /**
     28  * @hide
     29  */
     30 public class RetargetFilter extends Filter {
     31 
     32     @GenerateFinalPort(name = "target", hasDefault = false)
     33     private String mTargetString;
     34 
     35     private MutableFrameFormat mOutputFormat;
     36     private int mTarget = -1;
     37 
     38     public RetargetFilter(String name) {
     39         super(name);
     40     }
     41 
     42     @Override
     43     public void setupPorts() {
     44         // Setup target
     45         mTarget = FrameFormat.readTargetString(mTargetString);
     46 
     47         // Add ports
     48         addInputPort("frame");
     49         addOutputBasedOnInput("frame", "frame");
     50     }
     51 
     52     @Override
     53     public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) {
     54         MutableFrameFormat retargeted = inputFormat.mutableCopy();
     55         retargeted.setTarget(mTarget);
     56         return retargeted;
     57     }
     58 
     59     @Override
     60     public void process(FilterContext context) {
     61         // Get input frame
     62         Frame input = pullInput("frame");
     63 
     64         // Create output frame
     65         Frame output = context.getFrameManager().duplicateFrameToTarget(input, mTarget);
     66 
     67         // Push output
     68         pushOutput("frame", output);
     69 
     70         // Release pushed frame
     71         output.release();
     72     }
     73 
     74 }
     75