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.transform; 18 19// TODO: scale filter needs to be able to specify output width and height 20import androidx.media.filterfw.FrameType; 21import androidx.media.filterfw.InputPort; 22import androidx.media.filterfw.MffContext; 23import androidx.media.filterfw.Signature; 24 25public class ScaleFilter extends ResizeFilter { 26 27 private float mScale = 1.0f; 28 29 public ScaleFilter(MffContext context, String name) { 30 super(context, name); 31 } 32 33 @Override 34 public Signature getSignature() { 35 FrameType imageIn = FrameType.image2D(FrameType.ELEMENT_RGBA8888, FrameType.READ_GPU); 36 FrameType imageOut = FrameType.image2D(FrameType.ELEMENT_RGBA8888, FrameType.WRITE_GPU); 37 return new Signature() 38 .addInputPort("image", Signature.PORT_REQUIRED, imageIn) 39 .addInputPort("scale", Signature.PORT_OPTIONAL, FrameType.single(float.class)) 40 .addInputPort("useMipmaps", Signature.PORT_OPTIONAL, FrameType.single(boolean.class)) 41 .addOutputPort("image", Signature.PORT_REQUIRED, imageOut) 42 .disallowOtherPorts(); 43 } 44 45 @Override 46 public void onInputPortOpen(InputPort port) { 47 if (port.getName().equals("scale")) { 48 port.bindToFieldNamed("mScale"); 49 port.setAutoPullEnabled(true); 50 } else if (port.getName().equals("useMipmaps")) { 51 port.bindToFieldNamed("mUseMipmaps"); 52 port.setAutoPullEnabled(true); 53 } 54 } 55 56 @Override 57 protected int getOutputWidth(int inWidth, int inHeight) { 58 return (int)(inWidth * mScale); 59 } 60 61 @Override 62 protected int getOutputHeight(int inWidth, int inHeight) { 63 return (int)(inHeight * mScale); 64 } 65 66} 67