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Diffstat (limited to '')
| -rw-r--r-- | media/ffvpx/libavcodec/fft-internal.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/fft-internal.h b/media/ffvpx/libavcodec/fft-internal.h new file mode 100644 index 0000000000..d89a3e38ca --- /dev/null +++ b/media/ffvpx/libavcodec/fft-internal.h @@ -0,0 +1,62 @@ +/* + * 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 + */ + +#ifndef AVCODEC_FFT_INTERNAL_H +#define AVCODEC_FFT_INTERNAL_H + +#include "libavutil/mathematics.h" +#include "fft.h" + +#if FFT_FLOAT + +#define FIX15(v) (v) +#define sqrthalf (float)M_SQRT1_2 + +#define BF(x, y, a, b) do { \ + x = a - b; \ + y = a + b; \ + } while (0) + +#define CMUL(dre, dim, are, aim, bre, bim) do { \ + (dre) = (are) * (bre) - (aim) * (bim); \ + (dim) = (are) * (bim) + (aim) * (bre); \ + } while (0) + +#else /* FFT_FLOAT */ + +#define CMUL(dre, dim, are, aim, bre, bim) do { \ + int64_t accu; \ + (accu) = (int64_t)(bre) * (are); \ + (accu) -= (int64_t)(bim) * (aim); \ + (dre) = (int)(((accu) + 0x40000000) >> 31); \ + (accu) = (int64_t)(bre) * (aim); \ + (accu) += (int64_t)(bim) * (are); \ + (dim) = (int)(((accu) + 0x40000000) >> 31); \ + } while (0) + +#endif /* FFT_FLOAT */ + +#define ff_imdct_calc_c FFT_NAME(ff_imdct_calc_c) +#define ff_imdct_half_c FFT_NAME(ff_imdct_half_c) +#define ff_mdct_calc_c FFT_NAME(ff_mdct_calc_c) + +void ff_imdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); +void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input); +void ff_mdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); + +#endif /* AVCODEC_FFT_INTERNAL_H */ |