repositories / deb_ffmpeg.git / blame
| 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 */ |