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53 lines
1.7 KiB
53 lines
1.7 KiB
/* |
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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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