diff options
Diffstat (limited to 'media/ffvpx/libavcodec/fft-internal.h')
-rw-r--r-- | media/ffvpx/libavcodec/fft-internal.h | 94 |
1 files changed, 94 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..0a8f7d05cf --- /dev/null +++ b/media/ffvpx/libavcodec/fft-internal.h @@ -0,0 +1,94 @@ +/* + * 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 + +#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 + +#define SCALE_FLOAT(a, bits) lrint((a) * (double)(1 << (bits))) + +#if FFT_FIXED_32 + +#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) + +#define FIX15(a) av_clip(SCALE_FLOAT(a, 31), -2147483647, 2147483647) + +#else /* FFT_FIXED_32 */ + +#include "fft.h" +#include "mathops.h" + +void ff_mdct_calcw_c(FFTContext *s, FFTDouble *output, const FFTSample *input); + +#define FIX15(a) av_clip(SCALE_FLOAT(a, 15), -32767, 32767) + +#define sqrthalf ((int16_t)((1<<15)*M_SQRT1_2)) + +#define BF(x, y, a, b) do { \ + x = (a - b) >> 1; \ + y = (a + b) >> 1; \ + } while (0) + +#define CMULS(dre, dim, are, aim, bre, bim, sh) do { \ + (dre) = (MUL16(are, bre) - MUL16(aim, bim)) >> sh; \ + (dim) = (MUL16(are, bim) + MUL16(aim, bre)) >> sh; \ + } while (0) + +#define CMUL(dre, dim, are, aim, bre, bim) \ + CMULS(dre, dim, are, aim, bre, bim, 15) + +#define CMULL(dre, dim, are, aim, bre, bim) \ + CMULS(dre, dim, are, aim, bre, bim, 0) + +#endif /* FFT_FIXED_32 */ + +#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 */ |