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75 lines
2.5 KiB
75 lines
2.5 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVCODEC_FFT_INTERNAL_H |
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#define AVCODEC_FFT_INTERNAL_H |
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#if CONFIG_FFT_FLOAT |
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#define FIX15(v) (v) |
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#define sqrthalf (float)M_SQRT1_2 |
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#define BF(x, y, a, b) do { \ |
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x = a - b; \ |
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y = a + b; \ |
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} while (0) |
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#define CMUL(dre, dim, are, aim, bre, bim) do { \ |
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(dre) = (are) * (bre) - (aim) * (bim); \ |
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(dim) = (are) * (bim) + (aim) * (bre); \ |
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} while (0) |
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#else |
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#include "fft.h" |
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#include "mathops.h" |
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void ff_mdct_calcw_c(FFTContext *s, FFTDouble *output, const FFTSample *input); |
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#define SCALE_FLOAT(a, bits) lrint((a) * (double)(1 << (bits))) |
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#define FIX15(a) av_clip(SCALE_FLOAT(a, 15), -32767, 32767) |
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#define sqrthalf ((int16_t)((1<<15)*M_SQRT1_2)) |
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#define BF(x, y, a, b) do { \ |
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x = (a - b) >> 1; \ |
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y = (a + b) >> 1; \ |
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} while (0) |
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#define CMULS(dre, dim, are, aim, bre, bim, sh) do { \ |
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(dre) = (MUL16(are, bre) - MUL16(aim, bim)) >> sh; \ |
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(dim) = (MUL16(are, bim) + MUL16(aim, bre)) >> sh; \ |
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} while (0) |
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#define CMUL(dre, dim, are, aim, bre, bim) \ |
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CMULS(dre, dim, are, aim, bre, bim, 15) |
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#define CMULL(dre, dim, are, aim, bre, bim) \ |
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CMULS(dre, dim, are, aim, bre, bim, 0) |
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#endif /* CONFIG_FFT_FLOAT */ |
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#define ff_imdct_calc_c FFT_NAME(ff_imdct_calc_c) |
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#define ff_imdct_half_c FFT_NAME(ff_imdct_half_c) |
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#define ff_mdct_calc_c FFT_NAME(ff_mdct_calc_c) |
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void ff_imdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); |
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void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input); |
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void ff_mdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); |
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#endif /* AVCODEC_FFT_INTERNAL_H */
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