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 17 18package android.filterpacks.imageproc; 19 20import android.filterfw.core.Filter; 21import android.filterfw.core.FilterContext; 22import android.filterfw.core.Frame; 23import android.filterfw.core.FrameFormat; 24import android.filterfw.core.Program; 25import android.filterfw.format.ImageFormat; 26 27import java.lang.reflect.Field; 28 29/** 30 * @hide 31 */ 32public abstract class ImageCombineFilter extends Filter { 33 34 protected Program mProgram; 35 protected String[] mInputNames; 36 protected String mOutputName; 37 protected String mParameterName; 38 protected int mCurrentTarget = FrameFormat.TARGET_UNSPECIFIED; 39 40 public ImageCombineFilter(String name, 41 String[] inputNames, 42 String outputName, 43 String parameterName) { 44 super(name); 45 mInputNames = inputNames; 46 mOutputName = outputName; 47 mParameterName = parameterName; 48 } 49 50 @Override 51 public void setupPorts() { 52 if (mParameterName != null) { 53 try { 54 Field programField = ImageCombineFilter.class.getDeclaredField("mProgram"); 55 addProgramPort(mParameterName, mParameterName, programField, float.class, false); 56 } catch (NoSuchFieldException e) { 57 throw new RuntimeException("Internal Error: mProgram field not found!"); 58 } 59 } 60 for (String inputName : mInputNames) { 61 addMaskedInputPort(inputName, ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 62 } 63 addOutputBasedOnInput(mOutputName, mInputNames[0]); 64 } 65 66 @Override 67 public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 68 return inputFormat; 69 } 70 71 private void assertAllInputTargetsMatch() { 72 int target = getInputFormat(mInputNames[0]).getTarget(); 73 for (String inputName : mInputNames) { 74 if (target != getInputFormat(inputName).getTarget()) { 75 throw new RuntimeException("Type mismatch of input formats in filter " + this 76 + ". All input frames must have the same target!"); 77 } 78 } 79 } 80 81 @Override 82 public void process(FilterContext context) { 83 // Pull input frames 84 int i = 0; 85 Frame[] inputs = new Frame[mInputNames.length]; 86 for (String inputName : mInputNames) { 87 inputs[i++] = pullInput(inputName); 88 } 89 90 // Create output frame 91 Frame output = context.getFrameManager().newFrame(inputs[0].getFormat()); 92 93 // Make sure we have a program 94 updateProgramWithTarget(inputs[0].getFormat().getTarget(), context); 95 96 // Process 97 mProgram.process(inputs, output); 98 99 // Push output 100 pushOutput(mOutputName, output); 101 102 // Release pushed frame 103 output.release(); 104 } 105 106 protected void updateProgramWithTarget(int target, FilterContext context) { 107 if (target != mCurrentTarget) { 108 switch (target) { 109 case FrameFormat.TARGET_NATIVE: 110 mProgram = getNativeProgram(context); 111 break; 112 113 case FrameFormat.TARGET_GPU: 114 mProgram = getShaderProgram(context); 115 break; 116 117 default: 118 mProgram = null; 119 break; 120 } 121 if (mProgram == null) { 122 throw new RuntimeException("Could not create a program for image filter " 123 + this + "!"); 124 } 125 initProgramInputs(mProgram, context); 126 mCurrentTarget = target; 127 } 128 } 129 130 protected abstract Program getNativeProgram(FilterContext context); 131 132 protected abstract Program getShaderProgram(FilterContext context); 133} 134