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.filterfw.core; 19 20 /** 21 * @hide 22 */ 23 public abstract class InputPort extends FilterPort { 24 25 protected OutputPort mSourcePort; 26 InputPort(Filter filter, String name)27 public InputPort(Filter filter, String name) { 28 super(filter, name); 29 } 30 setSourcePort(OutputPort source)31 public void setSourcePort(OutputPort source) { 32 if (mSourcePort != null) { 33 throw new RuntimeException(this + " already connected to " + mSourcePort + "!"); 34 } 35 mSourcePort = source; 36 } 37 isConnected()38 public boolean isConnected() { 39 return mSourcePort != null; 40 } 41 open()42 public void open() { 43 super.open(); 44 if (mSourcePort != null && !mSourcePort.isOpen()) { 45 mSourcePort.open(); 46 } 47 } 48 close()49 public void close() { 50 if (mSourcePort != null && mSourcePort.isOpen()) { 51 mSourcePort.close(); 52 } 53 super.close(); 54 } 55 getSourcePort()56 public OutputPort getSourcePort() { 57 return mSourcePort; 58 } 59 getSourceFilter()60 public Filter getSourceFilter() { 61 return mSourcePort == null ? null : mSourcePort.getFilter(); 62 } 63 getSourceFormat()64 public FrameFormat getSourceFormat() { 65 return mSourcePort != null ? mSourcePort.getPortFormat() : getPortFormat(); 66 } 67 getTarget()68 public Object getTarget() { 69 return null; 70 } 71 filterMustClose()72 public boolean filterMustClose() { 73 return !isOpen() && isBlocking() && !hasFrame(); 74 } 75 isReady()76 public boolean isReady() { 77 return hasFrame() || !isBlocking(); 78 } 79 acceptsFrame()80 public boolean acceptsFrame() { 81 return !hasFrame(); 82 } 83 transfer(FilterContext context)84 public abstract void transfer(FilterContext context); 85 } 86