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[2318] | 1 | //rms.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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| 5 | * |
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| 6 | * This file is part of libroardsp a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroardsp is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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| 25 | #include "libroardsp.h" |
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| 26 | |
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[2319] | 27 | int64_t roar_rms2_1_8 (int8_t * data, size_t samples) { |
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| 28 | register int64_t s = 0; |
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| 29 | register size_t i; |
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| 30 | |
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| 31 | for (i = 0; i < samples; i++) |
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| 32 | s += data[i] * data[i]; |
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| 33 | |
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| 34 | s /= samples; |
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| 35 | |
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| 36 | return s; |
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| 37 | } |
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| 38 | |
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| 39 | int64_t roar_rms2_1_16 (int16_t * data, size_t samples) { |
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| 40 | register int64_t s = 0; |
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| 41 | register size_t i; |
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| 42 | |
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| 43 | for (i = 0; i < samples; i++) |
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| 44 | s += data[i] * data[i]; |
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| 45 | |
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| 46 | s /= samples; |
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| 47 | |
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| 48 | return s; |
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| 49 | } |
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| 50 | |
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| 51 | int64_t roar_rms2_1_32 (int32_t * data, size_t samples) { |
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| 52 | register int64_t s = 0; |
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| 53 | register size_t i; |
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| 54 | |
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| 55 | for (i = 0; i < samples; i++) |
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| 56 | s += data[i] * data[i]; |
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| 57 | |
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| 58 | s /= samples; |
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| 59 | |
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| 60 | return s; |
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| 61 | } |
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| 62 | |
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[2318] | 63 | |
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| 64 | //ll |
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