2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef AVUTIL_TX_PRIV_H
20 #define AVUTIL_TX_PRIV_H
27 #include "attributes.h"
30 #define TX_NAME(x) x ## _float
31 typedef float FFTSample;
32 typedef AVComplexFloat FFTComplex;
33 #elif defined(TX_DOUBLE)
34 #define TX_NAME(x) x ## _double
35 typedef double FFTSample;
36 typedef AVComplexDouble FFTComplex;
38 typedef void FFTComplex;
41 #if defined(TX_FLOAT) || defined(TX_DOUBLE)
42 #define BF(x, y, a, b) do { \
47 #define CMUL(dre, dim, are, aim, bre, bim) do { \
48 (dre) = (are) * (bre) - (aim) * (bim); \
49 (dim) = (are) * (bim) + (aim) * (bre); \
53 #define CMUL3(c, a, b) \
54 CMUL((c).re, (c).im, (a).re, (a).im, (b).re, (b).im)
56 #define COSTABLE(size) \
57 DECLARE_ALIGNED(32, FFTSample, TX_NAME(ff_cos_##size))[size/2]
59 /* Used by asm, reorder with care */
61 int n; /* Nptwo part */
62 int m; /* Ptwo part */
63 int inv; /* Is inverted */
66 FFTComplex *exptab; /* MDCT exptab */
67 FFTComplex *tmp; /* Temporary buffer needed for all compound transforms */
68 int *pfatab; /* Input/Output mapping for compound transforms */
69 int *revtab; /* Input mapping for power of two transforms */
72 /* Shared functions */
73 int ff_tx_gen_compound_mapping(AVTXContext *s);
74 int ff_tx_gen_ptwo_revtab(AVTXContext *s);
76 /* Also used by SIMD init */
77 static inline int split_radix_permutation(int i, int n, int inverse)
84 return split_radix_permutation(i, m, inverse)*2;
86 if (inverse == !(i & m))
87 return split_radix_permutation(i, m, inverse)*4 + 1;
89 return split_radix_permutation(i, m, inverse)*4 - 1;
92 /* Templated functions */
93 int ff_tx_init_mdct_fft_float(AVTXContext *s, av_tx_fn *tx,
94 enum AVTXType type, int inv, int len,
95 const void *scale, uint64_t flags);
96 int ff_tx_init_mdct_fft_double(AVTXContext *s, av_tx_fn *tx,
97 enum AVTXType type, int inv, int len,
98 const void *scale, uint64_t flags);
100 typedef struct CosTabsInitOnce {
105 #endif /* AVUTIL_TX_PRIV_H */