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