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#include <android/log.h> 18#include <stdlib.h> 19#include <string.h> 20 21#define LOGI(...) __android_log_print(ANDROID_LOG_INFO, "MCA", __VA_ARGS__) 22#define LOGW(...) __android_log_print(ANDROID_LOG_WARN, "MCA", __VA_ARGS__) 23#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, "MCA", __VA_ARGS__) 24 25typedef struct { 26 float brightness; 27} BrightnessParameters; 28 29typedef union { 30 int value; 31 char rgba[4]; 32} Pixel; 33 34void brightness_init(void** user_data) { 35 (*user_data) = malloc(sizeof(BrightnessParameters)); 36} 37 38void brightness_teardown(void* user_data) { 39 free(user_data); 40} 41 42void brightness_setvalue(const char* key, const char* value, void* user_data) { 43 if (strcmp(key, "brightness") == 0) 44 ((BrightnessParameters*)user_data)->brightness = atof(value); 45 else 46 LOGE("Unknown parameter: %s!", key); 47} 48 49int brightness_process(const char** inputs, 50 const int* input_sizes, 51 int input_count, 52 char* output, 53 int output_size, 54 void* user_data) { 55 // Make sure we have exactly one input 56 if (input_count != 1) { 57 LOGE("Brightness: Incorrect input count! Expected 1 but got %d!", input_count); 58 return 0; 59 } 60 61 // Make sure sizes match up 62 if (input_sizes[0] != output_size) { 63 LOGE("Brightness: Input-output sizes do not match up. %d vs. %d!", input_sizes[0], output_size); 64 return 0; 65 } 66 67 // Get the input and output pointers 68 const int* input_ptr = (int*)inputs[0]; 69 int* output_ptr = (int*)output; 70 const int* end_ptr = input_ptr + (output_size / 4); 71 if (!input_ptr || !output_ptr) { 72 LOGE("Brightness: No input or output pointer found!"); 73 return 0; 74 } 75 76 // Get the parameters 77 BrightnessParameters* params = (BrightnessParameters*)user_data; 78 const float brightness = params->brightness; 79 80 // Run the brightness adjustment 81 const int factor = (int)(brightness * 255.0f); 82 Pixel pixel; 83 while (input_ptr < end_ptr) { 84 pixel.value = *(input_ptr++); 85 86 const short r = (pixel.rgba[0] * factor) / 255; 87 const short g = (pixel.rgba[1] * factor) / 255; 88 const short b = (pixel.rgba[2] * factor) / 255; 89 90 *(output_ptr++) = (r > 255 ? 255 : r) 91 | ((g > 255 ? 255 : g) << 8) 92 | ((b > 255 ? 255 : b) << 16) 93 | (pixel.rgba[3] << 24); 94 } 95 96 return 1; 97} 98 99