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 17package androidx.media.filterfw.samples.simplecamera; 18 19import android.util.Log; 20import androidx.media.filterfw.Filter; 21import androidx.media.filterfw.Frame; 22import androidx.media.filterfw.FrameImage2D; 23import androidx.media.filterfw.FrameType; 24import androidx.media.filterfw.FrameValue; 25import androidx.media.filterfw.MffContext; 26import androidx.media.filterfw.OutputPort; 27import androidx.media.filterfw.Signature; 28 29import java.nio.ByteBuffer; 30 31public class ExposureFilter extends Filter { 32 33 private FrameType mImageType; 34 private static final String TAG = "ExposureFilter"; 35 private static boolean mLogVerbose = Log.isLoggable(TAG, Log.VERBOSE); 36 private static int OVER_EXPOSURE_TOLERANCE = 5; 37 38 public ExposureFilter(MffContext context, String name) { 39 super(context, name); 40 } 41 42 @Override 43 public Signature getSignature() { 44 FrameType imageIn = FrameType.image2D(FrameType.ELEMENT_RGBA8888, FrameType.READ_GPU); 45 FrameType floatT = FrameType.single(float.class); 46 return new Signature().addInputPort("image", Signature.PORT_REQUIRED, imageIn) 47 .addOutputPort("overExposedNum", Signature.PORT_OPTIONAL, floatT) 48 .addOutputPort("overExposureRating", Signature.PORT_REQUIRED, floatT) 49 .addOutputPort("underExposedNum", Signature.PORT_OPTIONAL, floatT) 50 .addOutputPort("underExposureRating", Signature.PORT_REQUIRED, floatT) 51 .disallowOtherPorts(); 52 53 } 54 55 @Override 56 protected void onProcess() { 57 FrameImage2D inputImage = getConnectedInputPort("image").pullFrame().asFrameImage2D(); 58 59 float overExposedPixels, underExposedPixels; 60 ByteBuffer inputBuffer = inputImage.lockBytes(Frame.MODE_READ); 61 62 overExposedPixels = overExposureOperator(inputImage.getWidth(), 63 inputImage.getHeight(), 64 inputBuffer); 65 underExposedPixels = underExposureOperator(inputImage.getWidth(), 66 inputImage.getHeight(), 67 inputBuffer); 68 inputImage.unlock(); 69 70 71 if (mLogVerbose) Log.v(TAG, "underExposedPixelCount: " + underExposedPixels); 72 73 OutputPort underPort = getConnectedOutputPort("underExposedNum"); 74 if (underPort != null) { 75 FrameValue underOutFrame = underPort.fetchAvailableFrame(null).asFrameValue(); 76 underOutFrame.setValue(underExposedPixels*inputImage.getWidth()*inputImage.getHeight()); 77 underPort.pushFrame(underOutFrame); 78 } 79 80 81 OutputPort underPort2 = getConnectedOutputPort("underExposureRating"); 82 FrameValue underOutFrame2 = underPort2.fetchAvailableFrame(null).asFrameValue(); 83 underOutFrame2.setValue(underExposedPixels); 84 underPort2.pushFrame(underOutFrame2); 85 86 if (mLogVerbose) Log.v(TAG, "overExposedPixelCount: " + overExposedPixels); 87 88 OutputPort overPort = getConnectedOutputPort("overExposedNum"); 89 if (overPort != null) { 90 FrameValue overOutFrame = overPort.fetchAvailableFrame(null).asFrameValue(); 91 overOutFrame.setValue(overExposedPixels*inputImage.getWidth()*inputImage.getHeight()); 92 overPort.pushFrame(overOutFrame); 93 } 94 95 96 OutputPort overPort2 = getConnectedOutputPort("overExposureRating"); 97 FrameValue overOutFrame2 = overPort2.fetchAvailableFrame(null).asFrameValue(); 98 overOutFrame2.setValue(overExposedPixels); 99 overPort2.pushFrame(overOutFrame2); 100 101 } 102 103 private static native float overExposureOperator(int width, int height, 104 ByteBuffer imageBuffer); 105 private static native float underExposureOperator(int width, int height, 106 ByteBuffer imageBuffer); 107 108 static { 109 System.loadLibrary("smartcamera_jni"); 110 } 111} 112