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 18package android.filterpacks.base; 19 20import android.filterfw.core.Filter; 21import android.filterfw.core.FilterContext; 22import android.filterfw.core.Frame; 23import android.filterfw.core.FrameFormat; 24import android.filterfw.core.GenerateFieldPort; 25import android.filterfw.core.GenerateFinalPort; 26 27import android.util.Log; 28 29/** 30 * @hide 31 */ 32public class FrameFetch extends Filter { 33 34 @GenerateFinalPort(name = "format", hasDefault = true) 35 private FrameFormat mFormat; 36 37 @GenerateFieldPort(name = "key") 38 private String mKey; 39 40 @GenerateFieldPort(name = "repeatFrame", hasDefault = true) 41 private boolean mRepeatFrame = false; 42 43 public FrameFetch(String name) { 44 super(name); 45 } 46 47 @Override 48 public void setupPorts() { 49 addOutputPort("frame", mFormat == null ? FrameFormat.unspecified() : mFormat); 50 } 51 52 public void process(FilterContext context) { 53 Frame output = context.fetchFrame(mKey); 54 if (output != null) { 55 pushOutput("frame", output); 56 if (!mRepeatFrame) { 57 closeOutputPort("frame"); 58 } 59 } else { 60 delayNextProcess(250); 61 } 62 } 63 64} 65