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/**
*
* Copyright 2016-2020 Netflix, Inc.
*
* Licensed under the BSD+Patent License (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://opensource.org/licenses/BSDplusPatent
*
* 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <math.h>
#include "mem.h"
#include "moment_options.h"
int compute_1st_moment(const float *pic, int w, int h, int stride, double *score)
{
double cum = 0;
float pic_;
int stride_ = stride / sizeof(float);
for (int i = 0; i < h; ++i)
{
for (int j = 0; j < w; ++j)
{
pic_ = pic[i * stride_ + j];
cum += pic_;
}
}
cum /= (w * h);
*score = cum;
return 0;
}
int compute_2nd_moment(const float *pic, int w, int h, int stride, double *score)
{
double cum = 0;
float pic_;
int stride_ = stride / sizeof(float);
for (int i = 0; i < h; ++i)
{
for (int j = 0; j < w; ++j)
{
pic_ = pic[i * stride_ + j];
cum += pic_ * pic_;
}
}
cum /= (w * h);
*score = cum;
return 0;
}