| /* |
| * 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 android.filterpacks.imageproc; |
| |
| import android.filterfw.core.Filter; |
| import android.filterfw.core.FilterContext; |
| import android.filterfw.core.Frame; |
| import android.filterfw.core.FrameFormat; |
| import android.filterfw.core.Program; |
| import android.filterfw.format.ImageFormat; |
| |
| import java.lang.reflect.Field; |
| |
| /** |
| * @hide |
| */ |
| public abstract class SimpleImageFilter extends Filter { |
| |
| protected int mCurrentTarget = FrameFormat.TARGET_UNSPECIFIED; |
| protected Program mProgram; |
| protected String mParameterName; |
| |
| public SimpleImageFilter(String name, String parameterName) { |
| super(name); |
| mParameterName = parameterName; |
| } |
| |
| @Override |
| public void setupPorts() { |
| if (mParameterName != null) { |
| try { |
| Field programField = SimpleImageFilter.class.getDeclaredField("mProgram"); |
| addProgramPort(mParameterName, mParameterName, programField, float.class, false); |
| } catch (NoSuchFieldException e) { |
| throw new RuntimeException("Internal Error: mProgram field not found!"); |
| } |
| } |
| addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); |
| addOutputBasedOnInput("image", "image"); |
| } |
| |
| @Override |
| public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { |
| return inputFormat; |
| } |
| |
| @Override |
| public void process(FilterContext context) { |
| // Get input frame |
| Frame input = pullInput("image"); |
| FrameFormat inputFormat = input.getFormat(); |
| |
| // Create output frame |
| Frame output = context.getFrameManager().newFrame(inputFormat); |
| |
| // Create program if not created already |
| updateProgramWithTarget(inputFormat.getTarget(), context); |
| |
| // Process |
| mProgram.process(input, output); |
| |
| // Push output |
| pushOutput("image", output); |
| |
| // Release pushed frame |
| output.release(); |
| } |
| |
| protected void updateProgramWithTarget(int target, FilterContext context) { |
| if (target != mCurrentTarget) { |
| switch (target) { |
| case FrameFormat.TARGET_NATIVE: |
| mProgram = getNativeProgram(context); |
| break; |
| |
| case FrameFormat.TARGET_GPU: |
| mProgram = getShaderProgram(context); |
| break; |
| |
| default: |
| mProgram = null; |
| break; |
| } |
| if (mProgram == null) { |
| throw new RuntimeException("Could not create a program for image filter " + this + "!"); |
| } |
| initProgramInputs(mProgram, context); |
| mCurrentTarget = target; |
| } |
| } |
| |
| protected abstract Program getNativeProgram(FilterContext context); |
| |
| protected abstract Program getShaderProgram(FilterContext context); |
| } |