Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * This file is part of FFmpeg. | |
3 | * | |
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. | |
8 | * | |
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. | |
13 | * | |
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 | |
17 | */ | |
18 | ||
19 | #ifndef AVCODEC_FFT_INTERNAL_H | |
20 | #define AVCODEC_FFT_INTERNAL_H | |
21 | ||
22 | #if FFT_FLOAT | |
23 | ||
24 | #define FIX15(v) (v) | |
25 | #define sqrthalf (float)M_SQRT1_2 | |
26 | ||
27 | #define BF(x, y, a, b) do { \ | |
28 | x = a - b; \ | |
29 | y = a + b; \ | |
30 | } while (0) | |
31 | ||
32 | #define CMUL(dre, dim, are, aim, bre, bim) do { \ | |
33 | (dre) = (are) * (bre) - (aim) * (bim); \ | |
34 | (dim) = (are) * (bim) + (aim) * (bre); \ | |
35 | } while (0) | |
36 | ||
37 | #else | |
38 | ||
39 | #define SCALE_FLOAT(a, bits) lrint((a) * (double)(1 << (bits))) | |
40 | ||
41 | #if FFT_FIXED_32 | |
42 | ||
43 | #define CMUL(dre, dim, are, aim, bre, bim) do { \ | |
44 | int64_t accu; \ | |
45 | (accu) = (int64_t)(bre) * (are); \ | |
46 | (accu) -= (int64_t)(bim) * (aim); \ | |
47 | (dre) = (int)(((accu) + 0x40000000) >> 31); \ | |
48 | (accu) = (int64_t)(bre) * (aim); \ | |
49 | (accu) += (int64_t)(bim) * (are); \ | |
50 | (dim) = (int)(((accu) + 0x40000000) >> 31); \ | |
51 | } while (0) | |
52 | ||
53 | #define FIX15(a) av_clip(SCALE_FLOAT(a, 31), -2147483647, 2147483647) | |
54 | ||
55 | #else /* FFT_FIXED_32 */ | |
56 | ||
57 | #include "fft.h" | |
58 | #include "mathops.h" | |
59 | ||
60 | void ff_mdct_calcw_c(FFTContext *s, FFTDouble *output, const FFTSample *input); | |
61 | ||
62 | #define FIX15(a) av_clip(SCALE_FLOAT(a, 15), -32767, 32767) | |
63 | ||
64 | #define sqrthalf ((int16_t)((1<<15)*M_SQRT1_2)) | |
65 | ||
66 | #define BF(x, y, a, b) do { \ | |
67 | x = (a - b) >> 1; \ | |
68 | y = (a + b) >> 1; \ | |
69 | } while (0) | |
70 | ||
71 | #define CMULS(dre, dim, are, aim, bre, bim, sh) do { \ | |
72 | (dre) = (MUL16(are, bre) - MUL16(aim, bim)) >> sh; \ | |
73 | (dim) = (MUL16(are, bim) + MUL16(aim, bre)) >> sh; \ | |
74 | } while (0) | |
75 | ||
76 | #define CMUL(dre, dim, are, aim, bre, bim) \ | |
77 | CMULS(dre, dim, are, aim, bre, bim, 15) | |
78 | ||
79 | #define CMULL(dre, dim, are, aim, bre, bim) \ | |
80 | CMULS(dre, dim, are, aim, bre, bim, 0) | |
81 | ||
82 | #endif /* FFT_FIXED_32 */ | |
83 | ||
84 | #endif /* FFT_FLOAT */ | |
85 | ||
86 | #define ff_imdct_calc_c FFT_NAME(ff_imdct_calc_c) | |
87 | #define ff_imdct_half_c FFT_NAME(ff_imdct_half_c) | |
88 | #define ff_mdct_calc_c FFT_NAME(ff_mdct_calc_c) | |
89 | ||
90 | void ff_imdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); | |
91 | void ff_imdct_half_c(FFTContext *s, FFTSample *output, const FFTSample *input); | |
92 | void ff_mdct_calc_c(FFTContext *s, FFTSample *output, const FFTSample *input); | |
93 | ||
94 | #endif /* AVCODEC_FFT_INTERNAL_H */ |