content: /*
   * 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 android.filterpacks.base;
  
  import android.filterfw.core.Filter;
  import android.filterfw.core.FilterContext;
  import android.filterfw.core.Frame;
  import android.filterfw.core.FrameFormat;
  import android.filterfw.core.GenerateFieldPort;
  import android.filterfw.core.GenerateFinalPort;
  
  /**
   * @hide
   */
  public class FrameFetch extends Filter {
  
      @GenerateFinalPort(name = "format", hasDefault = true)
      private FrameFormat mFormat;
  
      @GenerateFieldPort(name = "key")
      private String mKey;
  
      @GenerateFieldPort(name = "repeatFrame", hasDefault = true)
      private boolean mRepeatFrame = false;
  
      public FrameFetch(String name) {
          super(name);
      }
  
      @Override
      public void setupPorts() {
          addOutputPort("frame", mFormat == null ? FrameFormat.unspecified() : mFormat);
      }
  
      public void process(FilterContext context) {
          Frame output = context.fetchFrame(mKey);
          if (output != null) {
              pushOutput("frame", output);
              if (!mRepeatFrame) {
                  closeOutputPort("frame");
              }
          } else {
              delayNextProcess(250);
          }
      }
  
  }
  