[2318] | 1 | //rms.c: |
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| 2 | |
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| 3 | /* |
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[3633] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2010 |
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[2318] | 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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[3517] | 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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[2318] | 23 | * |
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| 24 | */ |
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| 25 | |
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| 26 | #include "libroardsp.h" |
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| 27 | |
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[2319] | 28 | int64_t roar_rms2_1_8 (int8_t * data, size_t samples) { |
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| 29 | register int64_t s = 0; |
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| 30 | register size_t i; |
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| 31 | |
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| 32 | for (i = 0; i < samples; i++) |
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| 33 | s += data[i] * data[i]; |
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| 34 | |
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| 35 | s /= samples; |
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| 36 | |
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| 37 | return s; |
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| 38 | } |
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| 39 | |
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| 40 | int64_t roar_rms2_1_16 (int16_t * data, size_t samples) { |
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| 41 | register int64_t s = 0; |
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| 42 | register size_t i; |
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| 43 | |
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| 44 | for (i = 0; i < samples; i++) |
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| 45 | s += data[i] * data[i]; |
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| 46 | |
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| 47 | s /= samples; |
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| 48 | |
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| 49 | return s; |
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| 50 | } |
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| 51 | |
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| 52 | int64_t roar_rms2_1_32 (int32_t * data, size_t samples) { |
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| 53 | register int64_t s = 0; |
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| 54 | register size_t i; |
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| 55 | |
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| 56 | for (i = 0; i < samples; i++) |
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| 57 | s += data[i] * data[i]; |
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| 58 | |
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| 59 | s /= samples; |
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| 60 | |
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| 61 | return s; |
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| 62 | } |
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| 63 | |
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[2318] | 64 | |
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[3633] | 65 | int roar_rms2_1_8_2 (int8_t * data, size_t samples, int64_t * rms) { |
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| 66 | register int64_t a0 = 0, a1 = 0; |
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| 67 | register size_t i; |
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| 68 | |
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| 69 | if ( samples == 0 ) |
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| 70 | return 0; |
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| 71 | |
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| 72 | if ( data == NULL ) |
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| 73 | return -1; |
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| 74 | |
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| 75 | if ( samples & 0x1 ) /* odd */ |
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| 76 | return -1; |
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| 77 | |
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| 78 | for (i = 0; i < samples; i += 2) { |
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| 79 | a0 += data[i+0] * data[i+0]; |
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| 80 | a1 += data[i+1] * data[i+1]; |
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| 81 | } |
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| 82 | |
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| 83 | samples /= 2; |
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| 84 | |
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| 85 | a0 /= samples; |
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| 86 | a1 /= samples; |
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| 87 | |
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| 88 | rms[0] = a0; |
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| 89 | rms[1] = a1; |
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| 90 | |
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| 91 | return 0; |
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| 92 | } |
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| 93 | |
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| 94 | int roar_rms2_1_16_2 (int16_t * data, size_t samples, int64_t * rms) { |
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| 95 | register int64_t a0 = 0, a1 = 0; |
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| 96 | register size_t i; |
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| 97 | |
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| 98 | if ( samples == 0 ) |
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| 99 | return 0; |
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| 100 | |
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| 101 | if ( data == NULL ) |
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| 102 | return -1; |
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| 103 | |
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| 104 | if ( samples & 0x1 ) /* odd */ |
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| 105 | return -1; |
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| 106 | |
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| 107 | for (i = 0; i < samples; i += 2) { |
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| 108 | a0 += data[i+0] * data[i+0]; |
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| 109 | a1 += data[i+1] * data[i+1]; |
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| 110 | } |
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| 111 | |
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| 112 | samples /= 2; |
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| 113 | |
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| 114 | a0 /= samples; |
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| 115 | a1 /= samples; |
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| 116 | |
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| 117 | rms[0] = a0; |
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| 118 | rms[1] = a1; |
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| 119 | |
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| 120 | return 0; |
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| 121 | } |
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| 122 | |
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| 123 | int roar_rms2_1_32_2 (int32_t * data, size_t samples, int64_t * rms) { |
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| 124 | register int64_t a0 = 0, a1 = 0; |
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| 125 | register size_t i; |
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| 126 | |
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| 127 | if ( samples == 0 ) |
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| 128 | return 0; |
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| 129 | |
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| 130 | if ( data == NULL ) |
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| 131 | return -1; |
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| 132 | |
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| 133 | if ( samples & 0x1 ) /* odd */ |
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| 134 | return -1; |
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| 135 | |
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| 136 | for (i = 0; i < samples; i += 2) { |
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| 137 | a0 += data[i+0] * data[i+0]; |
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| 138 | a1 += data[i+1] * data[i+1]; |
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| 139 | } |
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| 140 | |
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| 141 | samples /= 2; |
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| 142 | |
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| 143 | a0 /= samples; |
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| 144 | a1 /= samples; |
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| 145 | |
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| 146 | rms[0] = a0; |
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| 147 | rms[1] = a1; |
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| 148 | |
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| 149 | return 0; |
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| 150 | } |
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| 151 | |
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| 152 | |
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| 153 | int roar_rms2_1_8_n (int8_t * data, size_t samples, int64_t * rms, size_t n) { |
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| 154 | if ( n == 0 ) |
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| 155 | return 0; |
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| 156 | |
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| 157 | if ( rms == NULL ) |
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| 158 | return -1; |
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| 159 | |
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| 160 | switch (n) { |
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| 161 | case 1: return *rms = roar_rms2_1_8(data, samples); return *rms == -1 ? -1 : 0; break; |
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| 162 | default: |
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| 163 | return -1; |
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| 164 | } |
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| 165 | } |
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| 166 | |
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| 167 | int roar_rms2_1_16_n (int16_t * data, size_t samples, int64_t * rms, size_t n) { |
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| 168 | if ( n == 0 ) |
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| 169 | return 0; |
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| 170 | |
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| 171 | if ( rms == NULL ) |
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| 172 | return -1; |
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| 173 | |
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| 174 | switch (n) { |
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| 175 | case 1: return *rms = roar_rms2_1_16(data, samples); return *rms == -1 ? -1 : 0; break; |
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| 176 | default: |
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| 177 | return -1; |
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| 178 | } |
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| 179 | } |
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| 180 | |
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| 181 | int roar_rms2_1_32_n (int32_t * data, size_t samples, int64_t * rms, size_t n) { |
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| 182 | if ( n == 0 ) |
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| 183 | return 0; |
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| 184 | |
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| 185 | if ( rms == NULL ) |
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| 186 | return -1; |
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| 187 | |
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| 188 | switch (n) { |
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| 189 | case 1: return *rms = roar_rms2_1_32(data, samples); return *rms == -1 ? -1 : 0; break; |
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| 190 | default: |
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| 191 | return -1; |
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| 192 | } |
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| 193 | } |
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| 194 | |
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[2318] | 195 | //ll |
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