GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/tests/iirfilter.c Lines: 14 14 100.0 %
Date: 2020-08-14 10:39:37 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
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
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
}