[0] | 1 | //mixer.c: |
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| 2 | |
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[668] | 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2008 |
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| 5 | * |
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| 6 | * This file is part of roard 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 | * RoarAudio 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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[0] | 25 | #include "roard.h" |
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| 26 | |
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[16] | 27 | int change_vol (void * output, int bits, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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[18] | 28 | |
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| 29 | ROAR_DBG("change_vol(*): mixer at %p", set->mixer); |
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| 30 | |
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[16] | 31 | if ( bits == 8 ) { |
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| 32 | return change_vol_8bit(output, input, samples, channels, set); |
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| 33 | } else if ( bits == 16 ) { |
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| 34 | return change_vol_16bit(output, input, samples, channels, set); |
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| 35 | } else if ( bits == 24 ) { |
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| 36 | return change_vol_24bit(output, input, samples, channels, set); |
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| 37 | } else if ( bits == 32 ) { |
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| 38 | return change_vol_32bit(output, input, samples, channels, set); |
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| 39 | } else { |
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| 40 | return -1; |
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| 41 | } |
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| 42 | } |
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| 43 | |
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| 44 | int change_vol_8bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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[17] | 45 | char * in = input, * out = output; |
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[16] | 46 | int i; |
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[423] | 47 | register int s; |
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[16] | 48 | |
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| 49 | if ( !(in && out) ) |
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| 50 | return -1; |
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| 51 | |
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[253] | 52 | if (set->rpg_mul == set->rpg_div) { |
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| 53 | for (i = 0; i < samples; i++) { |
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| 54 | s = in[i]; |
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| 55 | s *= set->mixer[i % channels]; |
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| 56 | s /= set->scale; |
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| 57 | out[i] = s; |
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| 58 | } |
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| 59 | } else { |
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| 60 | for (i = 0; i < samples; i++) { |
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| 61 | s = in[i]; |
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[254] | 62 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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| 63 | s /= set->scale; |
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[253] | 64 | out[i] = s; |
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| 65 | } |
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[16] | 66 | } |
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| 67 | |
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| 68 | return 0; |
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| 69 | } |
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| 70 | |
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| 71 | int change_vol_16bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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[17] | 72 | int16_t * in = input, * out = output; |
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[16] | 73 | int i; |
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[423] | 74 | register int s; |
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[16] | 75 | |
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| 76 | if ( !(in && out) ) |
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| 77 | return -1; |
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| 78 | |
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[253] | 79 | if (set->rpg_mul == set->rpg_div) { |
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| 80 | for (i = 0; i < samples; i++) { |
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| 81 | s = in[i]; |
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| 82 | s *= set->mixer[i % channels]; |
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| 83 | s /= set->scale; |
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| 84 | out[i] = s; |
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| 85 | } |
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| 86 | } else { |
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| 87 | for (i = 0; i < samples; i++) { |
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| 88 | s = in[i]; |
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[254] | 89 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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| 90 | s /= set->scale; |
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[253] | 91 | out[i] = s; |
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| 92 | } |
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[16] | 93 | } |
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| 94 | |
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| 95 | return 0; |
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| 96 | } |
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| 97 | |
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| 98 | int change_vol_24bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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| 99 | return -1; |
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| 100 | } |
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| 101 | |
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| 102 | int change_vol_32bit (void * output, void * input, int samples, int channels, struct roar_mixer_settings * set) { |
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[855] | 103 | #ifdef ROAR_NATIVE_INT64 |
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| 104 | int32_t * in = input, * out = output; |
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| 105 | int i; |
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| 106 | ROAR_NATIVE_INT64 s; |
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| 107 | |
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| 108 | if ( !(in && out) ) |
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| 109 | return -1; |
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| 110 | |
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| 111 | if (set->rpg_mul == set->rpg_div) { |
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| 112 | for (i = 0; i < samples; i++) { |
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| 113 | s = in[i]; |
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| 114 | s *= set->mixer[i % channels]; |
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| 115 | s /= set->scale; |
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| 116 | out[i] = s; |
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| 117 | } |
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| 118 | } else { |
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| 119 | for (i = 0; i < samples; i++) { |
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| 120 | s = in[i]; |
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| 121 | s *= (set->mixer[i % channels] * set->rpg_mul) / set->rpg_div; |
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| 122 | s /= set->scale; |
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| 123 | out[i] = s; |
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| 124 | } |
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| 125 | } |
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| 126 | |
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| 127 | return 0; |
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| 128 | #else |
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[16] | 129 | return -1; |
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[855] | 130 | #endif |
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[16] | 131 | } |
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| 132 | |
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[2149] | 133 | int need_vol_change (int channels, struct roar_mixer_settings * set) { |
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| 134 | int i; |
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| 135 | |
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| 136 | if ( set == NULL || channels < 1 || channels > ROAR_MAX_CHANNELS ) |
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| 137 | return -1; |
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| 138 | |
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| 139 | if ( set->rpg_mul != set->rpg_div ) |
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| 140 | return 1; |
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| 141 | |
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| 142 | for (i = 0; i < channels; i++) |
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| 143 | if ( set->mixer[i] != set->scale ) |
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| 144 | return 1; |
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| 145 | |
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| 146 | return 0; |
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| 147 | } |
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[16] | 148 | |
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[0] | 149 | //ll |
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