FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/tests/iirfilter.c
Date: 2021-09-22 05:58:22
Exec Total Coverage
Lines: 14 14 100.0%
Branches: 4 4 100.0%

Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include <math.h>
20 #include <stdint.h>
21 #include <stdio.h>
22
23 #include "libavutil/libm.h"
24
25 #include "libavcodec/iirfilter.h"
26
27 #define FILT_ORDER 4
28 #define SIZE 1024
29
30 1 int main(void)
31 {
32 1 struct FFIIRFilterCoeffs *fcoeffs = NULL;
33 1 struct FFIIRFilterState *fstate = NULL;
34 1 float cutoff_coeff = 0.4;
35 int16_t x[SIZE], y[SIZE];
36 int i;
37
38 1 fcoeffs = ff_iir_filter_init_coeffs(NULL, FF_FILTER_TYPE_BUTTERWORTH,
39 FF_FILTER_MODE_LOWPASS, FILT_ORDER,
40 cutoff_coeff, 0.0, 0.0);
41 1 fstate = ff_iir_filter_init_state(FILT_ORDER);
42
43
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1025 for (i = 0; i < SIZE; i++)
44 1024 x[i] = lrint(0.75 * INT16_MAX * sin(0.5 * M_PI * i * i / SIZE));
45
46 1 ff_iir_filter(fcoeffs, fstate, SIZE, x, 1, y, 1);
47
48
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1025 for (i = 0; i < SIZE; i++)
49 1024 printf("%6d %6d\n", x[i], y[i]);
50
51 1 ff_iir_filter_free_coeffsp(&fcoeffs);
52 1 ff_iir_filter_free_statep(&fstate);
53 1 return 0;
54 }
55