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42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
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Copyright 2015 Ahmet Inan <xdsopl@googlemail.com>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <math.h>
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#include <complex.h>
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#include <stdio.h>
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double gauss(double n, double N, double o)
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{
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return exp(- 1.0/2.0 * pow((n - (N - 1.0) / 2.0) / (o * (N - 1.0) / 2.0), 2.0));
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}
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int main()
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{
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const int N = 2048;
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const double o = 0.2;
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printf("/* code generated by 'utils/stft.c' */\n");
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printf("static const int stft_N = %d;\n", N);
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printf("static const float stft_w[%d] = {\n", N);
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double sum = 0.0;
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for (int n = 0; n < N; n++)
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sum += gauss(n, N|1, o);
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for (int n = 0; n < N; n++) {
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printf("\t%a%s\n", gauss(n, N|1, o) / sum, n < (N-1) ? "," : "");
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}
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printf("};\n");
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return 0;
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}
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