1 /* 2 * Copyright 2013 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 package androidx.media.filterfw.samples.simplecamera; 18 19 import android.util.Log; 20 import androidx.media.filterfw.Filter; 21 import androidx.media.filterfw.Frame; 22 import androidx.media.filterfw.FrameImage2D; 23 import androidx.media.filterfw.FrameType; 24 import androidx.media.filterfw.FrameValue; 25 import androidx.media.filterfw.MffContext; 26 import androidx.media.filterfw.OutputPort; 27 import androidx.media.filterfw.Signature; 28 29 import java.nio.ByteBuffer; 30 31 public class AvgBrightnessFilter extends Filter { 32 33 private static final String TAG = "AvgBrightnessFilter"; 34 private static boolean mLogVerbose = Log.isLoggable(TAG, Log.VERBOSE); 35 36 public AvgBrightnessFilter(MffContext context, String name) { 37 super(context, name); 38 } 39 40 @Override 41 public Signature getSignature() { 42 FrameType imageIn = FrameType.image2D(FrameType.ELEMENT_RGBA8888, FrameType.READ_CPU); 43 FrameType floatT = FrameType.single(float.class); 44 return new Signature().addInputPort("image", Signature.PORT_REQUIRED, imageIn) 45 .addOutputPort("brightnessRating", Signature.PORT_OPTIONAL, floatT) 46 .disallowOtherPorts(); 47 48 } 49 50 @Override 51 protected void onProcess() { 52 FrameImage2D inputImage = getConnectedInputPort("image").pullFrame().asFrameImage2D(); 53 54 float brightness; 55 ByteBuffer inputBuffer = inputImage.lockBytes(Frame.MODE_READ); 56 57 brightness = brightnessOperator(inputImage.getWidth(),inputImage.getHeight(), inputBuffer); 58 59 inputImage.unlock(); 60 61 if (mLogVerbose) Log.v(TAG, "contrastRatio: " + brightness); 62 63 OutputPort brightnessPort = getConnectedOutputPort("brightnessRating"); 64 FrameValue brightnessOutFrame = brightnessPort.fetchAvailableFrame(null).asFrameValue(); 65 brightnessOutFrame.setValue(brightness); 66 brightnessPort.pushFrame(brightnessOutFrame); 67 } 68 69 private static native float brightnessOperator(int width, int height, ByteBuffer imageBuffer); 70 71 static { 72 System.loadLibrary("smartcamera_jni"); 73 } 74 75 } 76