diff options
Diffstat (limited to 'libavcodec/avfft.c')
-rw-r--r-- | libavcodec/avfft.c | 44 |
1 files changed, 39 insertions, 5 deletions
diff --git a/libavcodec/avfft.c b/libavcodec/avfft.c index 513f57e..675d2b9 100644 --- a/libavcodec/avfft.c +++ b/libavcodec/avfft.c @@ -1,18 +1,18 @@ /* - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -27,7 +27,7 @@ FFTContext *av_fft_init(int nbits, int inverse) { - FFTContext *s = av_malloc(sizeof(*s)); + FFTContext *s = av_mallocz(sizeof(*s)); if (s && ff_fft_init(s, nbits, inverse)) av_freep(&s); @@ -142,4 +142,38 @@ av_cold void av_dct_end(DCTContext *s) } } +#ifdef TEST +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; +} +#endif + #endif /* CONFIG_DCT */ |