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 Renn#include <android/log.h> 1865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn#include <stdlib.h> 1965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, "MCA", __VA_ARGS__) 2165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn#define LOGW(...) __android_log_print(ANDROID_LOG_WARN, "MCA", __VA_ARGS__) 2265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, "MCA", __VA_ARGS__) 2365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renntypedef struct { 2565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn float contrast; 2665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} ContrastParameters; 2765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 2865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennvoid contrast_init(void** user_data) { 2965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn (*user_data) = malloc(sizeof(ContrastParameters)); 3065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 3165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennvoid contrast_teardown(void* user_data) { 3365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn free(user_data); 3465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 3565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 3665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennvoid contrast_setvalue(const char* key, const char* value, void* user_data) { 3765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (strcmp(key, "contrast") == 0) 3865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn ((ContrastParameters*)user_data)->contrast = atof(value); 3965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn else 4065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn LOGE("Unknown parameter: %s!", key); 4165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 4265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 4365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Rennint contrast_process(const char** inputs, 4465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const int* input_sizes, 4565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn int input_count, 4665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn char* output, 4765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn int output_size, 4865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn void* user_data) { 4965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Make sure we have exactly one input 5065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (input_count != 1) { 5165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn LOGE("Contrast: Incorrect input count! Expected 1 but got %d!", input_count); 5265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return 0; 5365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 5465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 5565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Make sure sizes match up 5665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (input_sizes[0] != output_size) { 5765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn LOGE("Contrast: Input-output sizes do not match up. %d vs. %d!", input_sizes[0], output_size); 5865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return 0; 5965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 6065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 6165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Get the input and output pointers 6265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const char* input_ptr = inputs[0]; 6365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn char* output_ptr = output; 6465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn if (!input_ptr || !output_ptr) { 6565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn LOGE("Contrast: No input or output pointer found!"); 6665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return 0; 6765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 6865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 6965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Get the parameters 7065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn ContrastParameters* params = (ContrastParameters*)user_data; 7165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn const float contrast = params->contrast; 7265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 7365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn // Run the contrast adjustment 7465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn int i; 7565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn for (i = 0; i < output_size; ++i) { 7665953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn float px = *(input_ptr++) / 255.0; 7765953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn px -= 0.5; 7865953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn px *= contrast; 7965953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn px += 0.5; 8065953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn *(output_ptr++) = (char)(px > 1.0 ? 255.0 : (px < 0.0 ? 0.0 : px * 255.0)); 8165953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn } 8265953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 8365953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn return 1; 8465953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn} 8565953da4636fbf5f0a24b8f5f2b5fa7d76ff13d9Marius Renn 86