mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
64fbf2f03e
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "libavutil/mem.h"
|
|
#include "avfft.h"
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int i;
|
|
#define LEN 1024
|
|
FFTSample *ref = av_malloc_array(LEN, sizeof(*ref));
|
|
FFTSample *data = av_malloc_array(LEN, sizeof(*data));
|
|
RDFTContext *rdft_context = av_rdft_init(10, DFT_R2C);
|
|
RDFTContext *irdft_context = av_rdft_init(10, IDFT_C2R);
|
|
|
|
if (!ref || !data || !rdft_context || !irdft_context)
|
|
return 2;
|
|
for (i=0; i<LEN; i++) {
|
|
ref[i] = data[i] = i*456 + 123 + i*i;
|
|
}
|
|
av_rdft_calc(rdft_context, data);
|
|
av_rdft_calc(irdft_context, data);
|
|
|
|
for (i=0; i<LEN; i++) {
|
|
if (fabs(ref[i] - data[i]/LEN*2) > 1) {
|
|
fprintf(stderr, "Failed at %d (%f %f)\n", i, ref[i], data[i]/LEN*2);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
av_rdft_end(rdft_context);
|
|
av_rdft_end(irdft_context);
|
|
av_free(data);
|
|
av_free(ref);
|
|
|
|
return 0;
|
|
}
|