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