[2144] | 1 | //remove.c: |
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| 2 | |
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| 3 | /* |
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[3811] | 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2010 |
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[2144] | 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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[2144] | 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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[2145] | 28 | int roar_remove_init (struct roar_remove_state * state) { |
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| 29 | if ( state == NULL ) |
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| 30 | return -1; |
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| 31 | |
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| 32 | memset(state, 0, sizeof(struct roar_remove_state)); |
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| 33 | |
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| 34 | state->old = 65535; |
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| 35 | |
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| 36 | return 0; |
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| 37 | } |
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| 38 | |
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| 39 | int roar_remove (void * inout, void * subs, int samples, int bits, struct roar_remove_state * state) { |
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| 40 | if ( inout == NULL || subs == NULL || samples < 0 ) |
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| 41 | return -1; |
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| 42 | |
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| 43 | switch (bits) { |
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[2396] | 44 | case 8: return roar_remove_8 (inout, subs, samples, state); break; |
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[2145] | 45 | case 16: return roar_remove_16(inout, subs, samples, state); break; |
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| 46 | case 32: return roar_remove_32(inout, subs, samples, state); break; |
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| 47 | } |
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| 48 | |
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| 49 | return -1; |
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| 50 | } |
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| 51 | |
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| 52 | int roar_remove_8 (int8_t * inout, int8_t * subs, int samples, struct roar_remove_state * state) { |
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[2391] | 53 | int i; |
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| 54 | register int_least16_t s; |
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| 55 | register int_least16_t peak; |
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| 56 | |
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| 57 | if ( state == NULL ) { |
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| 58 | for (i = 0; i < samples; i++) { |
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| 59 | s = inout[i]; |
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| 60 | s -= subs[i]; |
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| 61 | inout[i] = s; |
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| 62 | } |
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| 63 | } else { |
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| 64 | peak = 127; |
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| 65 | for (i = 0; i < samples; i++) { |
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| 66 | s = inout[i]; |
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| 67 | s -= subs[i]; |
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| 68 | s = s < 0 ? -s : s; // we true 32 bit, not int operation here |
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| 69 | if ( s > peak ) |
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| 70 | peak = s; |
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| 71 | } |
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| 72 | |
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| 73 | for (i = 0; i < samples; i++) { |
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| 74 | s = -subs[i]; |
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| 75 | s *= 127; |
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| 76 | s /= peak; |
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| 77 | s += inout[i]; |
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| 78 | inout[i] = s; |
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| 79 | } |
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| 80 | } |
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| 81 | |
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| 82 | return 0; |
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[2145] | 83 | } |
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[2391] | 84 | |
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[2157] | 85 | int roar_remove_16 (int16_t * inout, int16_t * subs, int samples, struct roar_remove_state * state) { |
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[2145] | 86 | int i; |
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| 87 | register int32_t s; |
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| 88 | register int32_t peak; |
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| 89 | |
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| 90 | if ( state == NULL ) { |
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| 91 | for (i = 0; i < samples; i++) { |
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| 92 | s = inout[i]; |
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| 93 | s -= subs[i]; |
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| 94 | inout[i] = s; |
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| 95 | } |
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| 96 | } else { |
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| 97 | peak = 65535; |
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| 98 | for (i = 0; i < samples; i++) { |
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| 99 | s = inout[i]; |
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| 100 | s -= subs[i]; |
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| 101 | s = s < 0 ? -s : s; // we true 32 bit, not int operation here |
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| 102 | if ( s > peak ) |
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| 103 | peak = s; |
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| 104 | } |
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| 105 | |
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| 106 | for (i = 0; i < samples; i++) { |
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| 107 | s = -subs[i]; |
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| 108 | s *= 65535; |
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| 109 | s /= peak; |
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| 110 | s += inout[i]; |
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| 111 | inout[i] = s; |
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| 112 | } |
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| 113 | } |
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| 114 | |
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| 115 | return 0; |
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| 116 | } |
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[2391] | 117 | |
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[2157] | 118 | int roar_remove_32 (int32_t * inout, int32_t * subs, int samples, struct roar_remove_state * state) { |
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[2391] | 119 | int i; |
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| 120 | register int64_t s; |
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| 121 | register int64_t peak; |
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| 122 | |
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| 123 | if ( state == NULL ) { |
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| 124 | for (i = 0; i < samples; i++) { |
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| 125 | s = inout[i]; |
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| 126 | s -= subs[i]; |
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| 127 | inout[i] = s; |
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| 128 | } |
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| 129 | } else { |
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| 130 | peak = 4294967295UL; |
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| 131 | for (i = 0; i < samples; i++) { |
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| 132 | s = inout[i]; |
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| 133 | s -= subs[i]; |
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| 134 | s = s < 0 ? -s : s; // we true 32 bit, not int operation here |
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| 135 | if ( s > peak ) |
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| 136 | peak = s; |
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| 137 | } |
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| 138 | |
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| 139 | for (i = 0; i < samples; i++) { |
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| 140 | s = -subs[i]; |
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| 141 | s *= 4294967295UL; |
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| 142 | s /= peak; |
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| 143 | s += inout[i]; |
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| 144 | inout[i] = s; |
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| 145 | } |
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| 146 | } |
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| 147 | |
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| 148 | return 0; |
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[2145] | 149 | } |
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[2144] | 150 | |
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[2156] | 151 | int roar_remove_so (void * subout, void * in, int samples, int bits, struct roar_remove_state * state) { |
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| 152 | if ( subout == NULL || in == NULL || samples < 0 ) |
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| 153 | return -1; |
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| 154 | |
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| 155 | switch (bits) { |
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[2396] | 156 | case 8: return roar_remove_so8 (subout, in, samples, state); break; |
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[2156] | 157 | case 16: return roar_remove_so16(subout, in, samples, state); break; |
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[2396] | 158 | case 32: return roar_remove_so32(subout, in, samples, state); break; |
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[2156] | 159 | } |
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| 160 | |
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| 161 | return -1; |
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| 162 | } |
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| 163 | |
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[2395] | 164 | int roar_remove_so8 (int8_t * subout, int8_t * in, int samples, struct roar_remove_state * state) { |
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| 165 | int i; |
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| 166 | register int_least16_t s; |
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| 167 | register int_least16_t peak; |
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| 168 | |
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| 169 | if ( state == NULL ) { |
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| 170 | for (i = 0; i < samples; i++) { |
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| 171 | s = -subout[i]; |
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| 172 | s += in[i]; |
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| 173 | subout[i] = s; |
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| 174 | } |
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| 175 | } else { |
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| 176 | peak = 127; |
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| 177 | for (i = 0; i < samples; i++) { |
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| 178 | s = -subout[i]; |
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| 179 | s += in[i]; |
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| 180 | s = s < 0 ? -s : s; // we true 32 bit, not int operation here |
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| 181 | if ( s > peak ) |
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| 182 | peak = s; |
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| 183 | } |
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| 184 | |
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| 185 | for (i = 0; i < samples; i++) { |
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| 186 | s = -subout[i]; |
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| 187 | s *= 127; |
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| 188 | s /= peak; |
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| 189 | s += in[i]; |
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| 190 | subout[i] = s; |
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| 191 | } |
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| 192 | } |
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| 193 | |
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| 194 | return 0; |
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| 195 | } |
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| 196 | |
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[2156] | 197 | int roar_remove_so16 (int16_t * subout, int16_t * in, int samples, struct roar_remove_state * state) { |
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| 198 | int i; |
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| 199 | register int32_t s; |
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| 200 | register int32_t peak; |
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| 201 | |
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| 202 | if ( state == NULL ) { |
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| 203 | for (i = 0; i < samples; i++) { |
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| 204 | s = -subout[i]; |
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| 205 | s += in[i]; |
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| 206 | subout[i] = s; |
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| 207 | } |
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| 208 | } else { |
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| 209 | peak = 65535; |
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| 210 | for (i = 0; i < samples; i++) { |
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| 211 | s = -subout[i]; |
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| 212 | s += in[i]; |
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| 213 | s = s < 0 ? -s : s; // we true 32 bit, not int operation here |
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| 214 | if ( s > peak ) |
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| 215 | peak = s; |
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| 216 | } |
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| 217 | |
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| 218 | for (i = 0; i < samples; i++) { |
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| 219 | s = -subout[i]; |
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| 220 | s *= 65535; |
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| 221 | s /= peak; |
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| 222 | s += in[i]; |
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| 223 | subout[i] = s; |
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| 224 | } |
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| 225 | } |
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| 226 | |
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| 227 | return 0; |
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| 228 | } |
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| 229 | |
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[2394] | 230 | int roar_remove_so32 (int32_t * subout, int32_t * in, int samples, struct roar_remove_state * state) { |
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| 231 | int i; |
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| 232 | register int64_t s; |
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| 233 | register int64_t peak; |
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| 234 | |
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| 235 | if ( state == NULL ) { |
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| 236 | for (i = 0; i < samples; i++) { |
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| 237 | s = -subout[i]; |
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| 238 | s += in[i]; |
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| 239 | subout[i] = s; |
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| 240 | } |
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| 241 | } else { |
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[2423] | 242 | peak = 2147483647UL; |
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[2394] | 243 | for (i = 0; i < samples; i++) { |
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| 244 | s = -subout[i]; |
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| 245 | s += in[i]; |
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| 246 | s = s < 0 ? -s : s; // we true 32 bit, not int operation here |
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| 247 | if ( s > peak ) |
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| 248 | peak = s; |
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| 249 | } |
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| 250 | |
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| 251 | for (i = 0; i < samples; i++) { |
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| 252 | s = -subout[i]; |
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[2423] | 253 | s *= 2147483647UL; |
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[2394] | 254 | s /= peak; |
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| 255 | s += in[i]; |
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| 256 | subout[i] = s; |
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| 257 | } |
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| 258 | } |
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| 259 | |
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| 260 | return 0; |
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| 261 | } |
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| 262 | |
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[2144] | 263 | //ll |
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