diff options
Diffstat (limited to 'libavcodec/tests/avfft.c')
-rw-r--r-- | libavcodec/tests/avfft.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libavcodec/tests/avfft.c b/libavcodec/tests/avfft.c new file mode 100644 index 0000000000..6bc48ea870 --- /dev/null +++ b/libavcodec/tests/avfft.c @@ -0,0 +1,53 @@ +/* + * 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; +} |