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 17package androidx.media.filterpacks.text; 18 19import androidx.media.filterfw.Filter; 20import androidx.media.filterfw.FrameType; 21import androidx.media.filterfw.FrameValue; 22import androidx.media.filterfw.MffContext; 23import androidx.media.filterfw.OutputPort; 24import androidx.media.filterfw.Signature; 25 26public class ToStringFilter extends Filter { 27 28 public ToStringFilter(MffContext context, String name) { 29 super(context, name); 30 } 31 32 @Override 33 public Signature getSignature() { 34 return new Signature() 35 .addInputPort("object", Signature.PORT_REQUIRED, FrameType.single()) 36 .addOutputPort("string", Signature.PORT_REQUIRED, FrameType.single(String.class)) 37 .disallowOtherPorts(); 38 } 39 40 @Override 41 protected void onProcess() { 42 FrameValue objectFrame = getConnectedInputPort("object").pullFrame().asFrameValue(); 43 String outStr = objectFrame.getValue().toString(); 44 OutputPort outPort = getConnectedOutputPort("string"); 45 FrameValue stringFrame = outPort.fetchAvailableFrame(null).asFrameValue(); 46 stringFrame.setValue(outStr); 47 outPort.pushFrame(stringFrame); 48 } 49 50} 51 52