| /* |
| * 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. |
| */ |
| |
| #include <android/log.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #define LOGI(...) __android_log_print(ANDROID_LOG_INFO, "MCA", __VA_ARGS__) |
| #define LOGW(...) __android_log_print(ANDROID_LOG_WARN, "MCA", __VA_ARGS__) |
| #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR, "MCA", __VA_ARGS__) |
| |
| typedef struct { |
| float brightness; |
| } BrightnessParameters; |
| |
| typedef union { |
| int value; |
| char rgba[4]; |
| } Pixel; |
| |
| void brightness_init(void** user_data) { |
| (*user_data) = malloc(sizeof(BrightnessParameters)); |
| } |
| |
| void brightness_teardown(void* user_data) { |
| free(user_data); |
| } |
| |
| void brightness_setvalue(const char* key, const char* value, void* user_data) { |
| if (strcmp(key, "brightness") == 0) |
| ((BrightnessParameters*)user_data)->brightness = atof(value); |
| else |
| LOGE("Unknown parameter: %s!", key); |
| } |
| |
| int brightness_process(const char** inputs, |
| const int* input_sizes, |
| int input_count, |
| char* output, |
| int output_size, |
| void* user_data) { |
| // Make sure we have exactly one input |
| if (input_count != 1) { |
| LOGE("Brightness: Incorrect input count! Expected 1 but got %d!", input_count); |
| return 0; |
| } |
| |
| // Make sure sizes match up |
| if (input_sizes[0] != output_size) { |
| LOGE("Brightness: Input-output sizes do not match up. %d vs. %d!", input_sizes[0], output_size); |
| return 0; |
| } |
| |
| // Get the input and output pointers |
| const int* input_ptr = (int*)inputs[0]; |
| int* output_ptr = (int*)output; |
| const int* end_ptr = input_ptr + (output_size / 4); |
| if (!input_ptr || !output_ptr) { |
| LOGE("Brightness: No input or output pointer found!"); |
| return 0; |
| } |
| |
| // Get the parameters |
| BrightnessParameters* params = (BrightnessParameters*)user_data; |
| const float brightness = params->brightness; |
| |
| // Run the brightness adjustment |
| const int factor = (int)(brightness * 255.0f); |
| Pixel pixel; |
| while (input_ptr < end_ptr) { |
| pixel.value = *(input_ptr++); |
| |
| const short r = (pixel.rgba[0] * factor) / 255; |
| const short g = (pixel.rgba[1] * factor) / 255; |
| const short b = (pixel.rgba[2] * factor) / 255; |
| |
| *(output_ptr++) = (r > 255 ? 255 : r) |
| | ((g > 255 ? 255 : g) << 8) |
| | ((b > 255 ? 255 : b) << 16) |
| | (pixel.rgba[3] << 24); |
| } |
| |
| return 1; |
| } |
| |