/*
* 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 androidx.media.filterpacks.transform;
// TODO: scale filter needs to be able to specify output width and height
import androidx.media.filterfw.FrameType;
import androidx.media.filterfw.InputPort;
import androidx.media.filterfw.MffContext;
import androidx.media.filterfw.Signature;
public class ScaleFilter extends ResizeFilter {
private float mScale = 1.0f;
public ScaleFilter(MffContext context, String name) {
super(context, name);
}
@Override
public Signature getSignature() {
FrameType imageIn = FrameType.image2D(FrameType.ELEMENT_RGBA8888, FrameType.READ_GPU);
FrameType imageOut = FrameType.image2D(FrameType.ELEMENT_RGBA8888, FrameType.WRITE_GPU);
return new Signature()
.addInputPort("image", Signature.PORT_REQUIRED, imageIn)
.addInputPort("scale", Signature.PORT_OPTIONAL, FrameType.single(float.class))
.addInputPort("useMipmaps", Signature.PORT_OPTIONAL, FrameType.single(boolean.class))
.addOutputPort("image", Signature.PORT_REQUIRED, imageOut)
.disallowOtherPorts();
}
@Override
public void onInputPortOpen(InputPort port) {
if (port.getName().equals("scale")) {
port.bindToFieldNamed("mScale");
port.setAutoPullEnabled(true);
} else if (port.getName().equals("useMipmaps")) {
port.bindToFieldNamed("mUseMipmaps");
port.setAutoPullEnabled(true);
}
}
@Override
protected int getOutputWidth(int inWidth, int inHeight) {
return (int)(inWidth * mScale);
}
@Override
protected int getOutputHeight(int inWidth, int inHeight) {
return (int)(inHeight * mScale);
}
}