165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn/* 265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Copyright (C) 2011 The Android Open Source Project 365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Licensed under the Apache License, Version 2.0 (the "License"); 565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * you may not use this file except in compliance with the License. 665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * You may obtain a copy of the License at 765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * http://www.apache.org/licenses/LICENSE-2.0 965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * 1065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * Unless required by applicable law or agreed to in writing, software 1165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * distributed under the License is distributed on an "AS IS" BASIS, 1265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * See the License for the specific language governing permissions and 1465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn * limitations under the License. 1565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn */ 1665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennpackage android.filterpacks.imageproc; 1865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 1965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.Filter; 2065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.FilterContext; 2165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.Frame; 2265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.FrameFormat; 2365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.GenerateFieldPort; 2465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.Program; 2565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.core.ShaderProgram; 2665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport android.filterfw.format.ImageFormat; 2765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 28a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Linimport java.util.Date; 2965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennimport java.util.Random; 3065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennpublic class BlackWhiteFilter extends Filter { 3265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @GenerateFieldPort(name = "black", hasDefault = true) 3465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private float mBlack = 0f; 3565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @GenerateFieldPort(name = "white", hasDefault = true) 3765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private float mWhite = 1f; 3865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @GenerateFieldPort(name = "tile_size", hasDefault = true) 4065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private int mTileSize = 640; 4165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private Program mProgram; 43a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Lin private Random mRandom; 4465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private int mTarget = FrameFormat.TARGET_UNSPECIFIED; 4665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private final String mBlackWhiteShader = 4865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "precision mediump float;\n" + 4965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "uniform sampler2D tex_sampler_0;\n" + 50a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Lin "uniform vec2 seed;\n" + 5165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "uniform float black;\n" + 5265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "uniform float scale;\n" + 5365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "uniform float stepsize;\n" + 5465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "varying vec2 v_texcoord;\n" + 55f4b403159f8a89eb2158bbb6c314de3bc90fee73Ruei-sung Lin "float rand(vec2 loc) {\n" + 560a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // Compute sin(theta), theta = 12.9898 x + 78.233y 570a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // because floating point has limited range, make theta = theta1 + theta2 580a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // where theta1 = 12x + 78y and theta2 = 0.9898x + 0.233y) 590a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // Note that theta1 and theta2 cover diffent range of theta. 600a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " float theta1 = dot(loc, vec2(0.9898, 0.233));\n" + 610a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " float theta2 = dot(loc, vec2(12.0, 78.0));\n" + 620a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // Use the property sin(theta) = cos(theta1)*sin(theta2)+sin(theta1)*cos(theta2) 630a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // this approach also increases the precisions of sin(theta) 640a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " float value = cos(theta1) * sin(theta2) + sin(theta1) * cos(theta2);\n" + 650a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // fract(43758.5453 * x) = fract(43758 * x + 0.5453 * x) 660a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // keep value of part1 in range: (2^-14 to 2^14). Since 43758 = 117 * 374 670a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // fract(43758 * sin(theta)) = mod(221 * mod(198*sin(theta), 1.0), 1.0) 680a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // also to keep as much decimal digits, use the property 690a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin // mod(mod(198*sin(theta)) = mod(mod(197*sin(theta) + sin(theta)) 700a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " float temp = mod(197.0 * value, 1.0) + value;\n" + 710a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " float part1 = mod(220.0 * temp, 1.0) + temp;\n" + 720a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " float part2 = value * 0.5453;\n" + 730a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " float part3 = cos(theta1 + theta2) * 0.43758;\n" + 740a1013229254cdc146d4ce2f4b4aef301b018f09Ruei-sung Lin " return fract(part1 + part2 + part3);\n" + 75f4b403159f8a89eb2158bbb6c314de3bc90fee73Ruei-sung Lin "}\n" + 7665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "void main() {\n" + 7765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn " vec4 color = texture2D(tex_sampler_0, v_texcoord);\n" + 78a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Lin " float dither = rand(v_texcoord + seed);\n" + 7965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn " vec3 xform = clamp((color.rgb - black) * scale, 0.0, 1.0);\n" + 8065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn " vec3 temp = clamp((color.rgb + stepsize - black) * scale, 0.0, 1.0);\n" + 8165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn " vec3 new_color = clamp(xform + (temp - xform) * (dither - 0.5), 0.0, 1.0);\n" + 8265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn " gl_FragColor = vec4(new_color, color.a);\n" + 8365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "}\n"; 8465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 8565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public BlackWhiteFilter(String name) { 8665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn super(name); 87a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Lin mRandom = new Random(new Date().getTime()); 8865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 8965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 9165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public void setupPorts() { 9265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn addMaskedInputPort("image", ImageFormat.create(ImageFormat.COLORSPACE_RGBA)); 9365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn addOutputBasedOnInput("image", "image"); 9465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 9565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 9665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 9765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public FrameFormat getOutputFormat(String portName, FrameFormat inputFormat) { 9865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return inputFormat; 9965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 10065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 10165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public void initProgram(FilterContext context, int target) { 10265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn switch (target) { 10365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn case FrameFormat.TARGET_GPU: 10465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn ShaderProgram shaderProgram = new ShaderProgram(context, mBlackWhiteShader); 10565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn shaderProgram.setMaximumTileSize(mTileSize); 10665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mProgram = shaderProgram; 10765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn updateParameters(); 10865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn break; 10965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 11065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn default: 11165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn throw new RuntimeException("Filter Sharpen does not support frames of " + 11265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn "target " + target + "!"); 11365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mTarget = target; 11565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 11665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 11765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn private void updateParameters() { 11865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn float scale = (mBlack != mWhite) ? 1.0f / (mWhite - mBlack) : 2000f; 11965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn float stepsize = 1.0f / 255.0f; 12065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mProgram.setHostValue("black", mBlack); 12165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mProgram.setHostValue("scale", scale); 12265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn mProgram.setHostValue("stepsize", stepsize); 123a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Lin 124a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Lin float seed[] = { mRandom.nextFloat(), mRandom.nextFloat() }; 125a75c7bbc633a6ebd35a0651be5c7a79b83d0c5c0Ruei-sung Lin mProgram.setHostValue("seed", seed); 12665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 12765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 12865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 12965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public void fieldPortValueUpdated(String name, FilterContext context) { 13065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (mProgram != null) { 13165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn updateParameters(); 13265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 13365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 13465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 13565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn @Override 13665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn public void process(FilterContext context) { 13765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Get input frame 13865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Frame input = pullInput("image"); 13965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn FrameFormat inputFormat = input.getFormat(); 14065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 14165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Create program if not created already 14265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (mProgram == null || inputFormat.getTarget() != mTarget) { 14365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn initProgram(context, inputFormat.getTarget()); 14465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 14565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 14665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Create output frame 14765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn Frame output = context.getFrameManager().newFrame(inputFormat); 14865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 14965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Process 150f4b403159f8a89eb2158bbb6c314de3bc90fee73Ruei-sung Lin mProgram.process(input, output); 15165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 15265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Push output 15365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn pushOutput("image", output); 15465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 15565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Release pushed frame 15665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn output.release(); 15765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 15865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 159