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105 lines
3.5 KiB
105 lines
3.5 KiB
/* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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 AVUTIL_TX_PRIV_H |
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#define AVUTIL_TX_PRIV_H |
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#include "tx.h" |
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#include <stddef.h> |
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#include "thread.h" |
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#include "mem.h" |
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#include "avassert.h" |
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#include "attributes.h" |
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#ifdef TX_FLOAT |
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#define TX_NAME(x) x ## _float |
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typedef float FFTSample; |
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typedef AVComplexFloat FFTComplex; |
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#elif defined(TX_DOUBLE) |
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#define TX_NAME(x) x ## _double |
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typedef double FFTSample; |
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typedef AVComplexDouble FFTComplex; |
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#else |
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typedef void FFTComplex; |
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#endif |
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#if defined(TX_FLOAT) || defined(TX_DOUBLE) |
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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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#endif |
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#define CMUL3(c, a, b) \ |
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CMUL((c).re, (c).im, (a).re, (a).im, (b).re, (b).im) |
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#define COSTABLE(size) \ |
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DECLARE_ALIGNED(32, FFTSample, TX_NAME(ff_cos_##size))[size/2] |
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/* Used by asm, reorder with care */ |
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struct AVTXContext { |
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int n; /* Nptwo part */ |
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int m; /* Ptwo part */ |
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int inv; /* Is inverted */ |
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int type; /* Type */ |
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FFTComplex *exptab; /* MDCT exptab */ |
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FFTComplex *tmp; /* Temporary buffer needed for all compound transforms */ |
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int *pfatab; /* Input/Output mapping for compound transforms */ |
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int *revtab; /* Input mapping for power of two transforms */ |
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}; |
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/* Shared functions */ |
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int ff_tx_gen_compound_mapping(AVTXContext *s); |
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int ff_tx_gen_ptwo_revtab(AVTXContext *s); |
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/* Also used by SIMD init */ |
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static inline int split_radix_permutation(int i, int n, int inverse) |
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{ |
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int m; |
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if (n <= 2) |
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return i & 1; |
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m = n >> 1; |
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if (!(i & m)) |
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return split_radix_permutation(i, m, inverse)*2; |
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m >>= 1; |
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if (inverse == !(i & m)) |
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return split_radix_permutation(i, m, inverse)*4 + 1; |
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else |
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return split_radix_permutation(i, m, inverse)*4 - 1; |
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} |
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/* Templated functions */ |
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int ff_tx_init_mdct_fft_float(AVTXContext *s, av_tx_fn *tx, |
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enum AVTXType type, int inv, int len, |
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const void *scale, uint64_t flags); |
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int ff_tx_init_mdct_fft_double(AVTXContext *s, av_tx_fn *tx, |
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enum AVTXType type, int inv, int len, |
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const void *scale, uint64_t flags); |
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typedef struct CosTabsInitOnce { |
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void (*func)(void); |
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AVOnce control; |
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} CosTabsInitOnce; |
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#endif /* AVUTIL_TX_PRIV_H */
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