| /* |
| * 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 "libavcodec/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; |
| } |