| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Header file for hardcoded AAC cube-root table | ||
| 3 | * | ||
| 4 | * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de> | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #ifndef AVCODEC_CBRT_TABLEGEN_H | ||
| 24 | #define AVCODEC_CBRT_TABLEGEN_H | ||
| 25 | |||
| 26 | #include <stdint.h> | ||
| 27 | #include <math.h> | ||
| 28 | #include "libavutil/attributes.h" | ||
| 29 | #include "libavutil/intfloat.h" | ||
| 30 | #include "libavcodec/aac_defines.h" | ||
| 31 | |||
| 32 | #if USE_FIXED | ||
| 33 | #define CBRT(x) lrint((x) * 8192) | ||
| 34 | #else | ||
| 35 | #define CBRT(x) av_float2int((float)(x)) | ||
| 36 | #endif | ||
| 37 | |||
| 38 | uint32_t AAC_RENAME(ff_cbrt_tab)[1 << 13]; | ||
| 39 | |||
| 40 | 185 | av_cold void AAC_RENAME(ff_cbrt_tableinit)(void) | |
| 41 | { | ||
| 42 | static double cbrt_tab_dbl[1 << 13]; | ||
| 43 |
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185 | if (!AAC_RENAME(ff_cbrt_tab)[(1<<13) - 1]) { |
| 44 | int i, j, k; | ||
| 45 | double cbrt_val; | ||
| 46 | |||
| 47 |
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1515520 | for (i = 1; i < 1<<13; i++) |
| 48 | 1515335 | cbrt_tab_dbl[i] = 1; | |
| 49 | |||
| 50 | /* have to take care of non-squarefree numbers */ | ||
| 51 |
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| 52 |
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16280 | if (cbrt_tab_dbl[i] == 1) { |
| 53 | 4440 | cbrt_val = i * cbrt(i); | |
| 54 |
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17945 | for (k = i; k < 1<<13; k *= i) |
| 55 |
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3889995 | for (j = k; j < 1<<13; j += k) |
| 56 | 3876490 | cbrt_tab_dbl[j] *= cbrt_val; | |
| 57 | } | ||
| 58 | } | ||
| 59 | |||
| 60 |
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| 61 |
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749435 | if (cbrt_tab_dbl[i] == 1) { |
| 62 | 185740 | cbrt_val = i * cbrt(i); | |
| 63 |
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1118880 | for (j = i; j < 1<<13; j += i) |
| 64 | 933140 | cbrt_tab_dbl[j] *= cbrt_val; | |
| 65 | } | ||
| 66 | } | ||
| 67 | |||
| 68 |
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1515705 | for (i = 0; i < 1<<13; i++) |
| 69 | 1515520 | AAC_RENAME(ff_cbrt_tab)[i] = CBRT(cbrt_tab_dbl[i]); | |
| 70 | } | ||
| 71 | 185 | } | |
| 72 | |||
| 73 | #endif /* AVCODEC_CBRT_TABLEGEN_H */ | ||
| 74 |