[3327] | 1 | //channels.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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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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[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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[3327] | 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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[3328] | 28 | static struct { |
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| 29 | int id; |
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| 30 | char * name; |
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| 31 | char * sn; |
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| 32 | } _g_chans[] = { |
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| 33 | {ROARDSP_CHAN_NONE, "NONE", "NONE" }, |
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| 34 | {ROARDSP_CHAN_FRONT_LEFT, "FRONT_LEFT", "FL" }, |
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| 35 | {ROARDSP_CHAN_FRONT_RIGHT, "FRONT_RIGHT", "FR" }, |
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| 36 | {ROARDSP_CHAN_SIDE_LEFT, "SIDE_LEFT", "SL" }, |
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| 37 | {ROARDSP_CHAN_SIDE_RIGHT, "SIDE_RIGHT", "SR" }, |
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| 38 | {ROARDSP_CHAN_BACK_LEFT, "BACK_LEFT", "BL" }, |
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| 39 | {ROARDSP_CHAN_BACK_RIGHT, "BACK_RIGHT", "BR" }, |
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| 40 | {ROARDSP_CHAN_FRONT_CENTER, "FRONT_CENTER", "FC" }, |
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| 41 | {ROARDSP_CHAN_SIDE_CENTER, "SIDE_CENTER", "SC" }, |
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| 42 | {ROARDSP_CHAN_BACK_CENTER, "BACK_CENTER", "BC" }, |
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| 43 | {ROARDSP_CHAN_LEFT, "LEFT", "L" }, // alias |
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| 44 | {ROARDSP_CHAN_RIGHT, "RIGHT", "R" }, // alias |
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| 45 | {ROARDSP_CHAN_CENTER, "CENTER", "C" }, // alias |
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| 46 | {ROARDSP_CHAN_MONO, "MONO", "M" }, // alias |
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| 47 | {ROARDSP_CHAN_MS_MID, "MS_MID", "MID" }, |
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| 48 | {ROARDSP_CHAN_MS_SIDE, "MS_SIDE", "SIDE" }, |
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| 49 | {ROARDSP_CHAN_LFE, "LFE", "LFE" }, |
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| 50 | {ROARDSP_CHAN_EOL, NULL, NULL} |
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| 51 | }; |
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| 52 | |
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| 53 | char * roardsp_chan2str (int chan) { |
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| 54 | int i; |
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| 55 | |
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| 56 | for (i = 0; _g_chans[i].id != ROARDSP_CHAN_EOL; i++) |
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| 57 | if ( _g_chans[i].id == chan ) |
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| 58 | return _g_chans[i].name; |
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| 59 | |
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| 60 | return NULL; |
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| 61 | } |
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| 62 | |
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| 63 | int roardsp_str2chan(char * str) { |
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| 64 | int i; |
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| 65 | |
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| 66 | for (i = 0; _g_chans[i].id != ROARDSP_CHAN_EOL; i++) |
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| 67 | if ( !strcasecmp(_g_chans[i].name, str) || !strcasecmp(_g_chans[i].sn, str) ) |
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| 68 | return _g_chans[i].id; |
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| 69 | |
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| 70 | return -1; |
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| 71 | } |
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[3327] | 72 | |
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[3331] | 73 | int roardsp_chanlist2str(char * list, size_t len, char * str, size_t strlen) { |
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[3330] | 74 | int i; |
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| 75 | |
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| 76 | if ( list == NULL && len > 0 ) |
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| 77 | return -1; |
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| 78 | |
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| 79 | if ( (str == NULL || strlen == 0) && len > 0 ) |
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| 80 | return -1; |
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| 81 | |
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| 82 | if ( len == 0 ) { |
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| 83 | if ( str != NULL && strlen > 0 ) |
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| 84 | *str = 0; |
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| 85 | |
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| 86 | return 0; |
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| 87 | } |
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| 88 | |
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| 89 | // TODO: FIXME: do not ignore strlen from here |
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| 90 | *str = 0; |
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| 91 | |
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| 92 | for (i = 0; i < len; i++) { |
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| 93 | if ( i != 0 ) |
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| 94 | strcat(str, ","); |
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| 95 | |
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| 96 | strcat(str, roardsp_chan2str(list[i])); |
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| 97 | } |
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| 98 | |
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| 99 | return 0; |
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| 100 | } |
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| 101 | |
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[3538] | 102 | int roardsp_chanlist_init(char * list, int channels, int map) { |
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| 103 | if ( channels == 0 ) |
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| 104 | return 0; |
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| 105 | |
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| 106 | if ( list == NULL ) |
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| 107 | return -1; |
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| 108 | |
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| 109 | if ( channels > ROAR_MAX_CHANNELS ) |
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| 110 | return -1; |
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| 111 | |
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| 112 | // test for common maps: |
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| 113 | if ( channels == 1 ) { |
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| 114 | list[0] = ROARDSP_CHAN_MONO; |
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| 115 | return 0; |
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| 116 | } |
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| 117 | |
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| 118 | if ( channels == 2 ) { |
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| 119 | list[0] = ROARDSP_CHAN_LEFT; |
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| 120 | list[1] = ROARDSP_CHAN_RIGHT; |
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| 121 | return 0; |
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| 122 | } |
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| 123 | |
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| 124 | // test for specific maps: |
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| 125 | switch (map) { |
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| 126 | case ROARDSP_CHANLIST_MAP_ROARAUDIO: |
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| 127 | case ROARDSP_CHANLIST_MAP_FLAC: |
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| 128 | if ( map == ROARDSP_CHANLIST_MAP_FLAC && channels > 6 ) { |
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| 129 | // FLAC only has a fixed mapping for up to 6 channels. |
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| 130 | return -1; |
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| 131 | } |
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| 132 | |
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| 133 | switch (channels) { |
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| 134 | // FLAC or RoarAudio: |
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| 135 | case 3: |
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| 136 | list[0] = ROARDSP_CHAN_LEFT; |
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| 137 | list[1] = ROARDSP_CHAN_RIGHT; |
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| 138 | list[2] = ROARDSP_CHAN_CENTER; |
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| 139 | break; |
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| 140 | case 4: |
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| 141 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 142 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 143 | list[2] = ROARDSP_CHAN_BACK_LEFT; |
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| 144 | list[3] = ROARDSP_CHAN_BACK_RIGHT; |
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| 145 | break; |
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| 146 | case 5: |
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| 147 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 148 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 149 | list[2] = ROARDSP_CHAN_CENTER; |
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| 150 | list[3] = ROARDSP_CHAN_BACK_LEFT; |
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| 151 | list[4] = ROARDSP_CHAN_BACK_RIGHT; |
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| 152 | break; |
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| 153 | case 6: |
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| 154 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 155 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 156 | list[2] = ROARDSP_CHAN_CENTER; |
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| 157 | list[3] = ROARDSP_CHAN_LFE; |
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| 158 | list[4] = ROARDSP_CHAN_BACK_LEFT; |
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| 159 | list[5] = ROARDSP_CHAN_BACK_RIGHT; |
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| 160 | break; |
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| 161 | // RoarAudio: |
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| 162 | case 7: |
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| 163 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 164 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 165 | list[2] = ROARDSP_CHAN_CENTER; |
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| 166 | list[3] = ROARDSP_CHAN_LFE; |
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| 167 | list[4] = ROARDSP_CHAN_SIDE_LEFT; |
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| 168 | list[5] = ROARDSP_CHAN_SIDE_RIGHT; |
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| 169 | list[6] = ROARDSP_CHAN_BACK_CENTER; |
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| 170 | break; |
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| 171 | case 8: |
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| 172 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 173 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 174 | list[2] = ROARDSP_CHAN_CENTER; |
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| 175 | list[3] = ROARDSP_CHAN_LFE; |
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| 176 | list[4] = ROARDSP_CHAN_SIDE_LEFT; |
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| 177 | list[5] = ROARDSP_CHAN_SIDE_RIGHT; |
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| 178 | list[6] = ROARDSP_CHAN_BACK_LEFT; |
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| 179 | list[7] = ROARDSP_CHAN_BACK_RIGHT; |
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| 180 | break; |
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| 181 | default: |
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| 182 | return -1; |
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| 183 | break; |
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| 184 | } |
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| 185 | break; |
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| 186 | case ROARDSP_CHANLIST_MAP_VORBIS: |
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| 187 | switch (channels) { |
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| 188 | case 3: |
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| 189 | list[0] = ROARDSP_CHAN_LEFT; |
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| 190 | list[1] = ROARDSP_CHAN_CENTER; |
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| 191 | list[2] = ROARDSP_CHAN_RIGHT; |
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| 192 | break; |
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| 193 | case 4: |
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| 194 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 195 | list[1] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 196 | list[2] = ROARDSP_CHAN_BACK_LEFT; |
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| 197 | list[3] = ROARDSP_CHAN_BACK_RIGHT; |
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| 198 | break; |
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| 199 | case 5: |
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| 200 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 201 | list[1] = ROARDSP_CHAN_CENTER; |
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| 202 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 203 | list[3] = ROARDSP_CHAN_BACK_LEFT; |
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| 204 | list[4] = ROARDSP_CHAN_BACK_RIGHT; |
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| 205 | break; |
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| 206 | case 6: |
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| 207 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 208 | list[1] = ROARDSP_CHAN_CENTER; |
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| 209 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 210 | list[3] = ROARDSP_CHAN_BACK_LEFT; |
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| 211 | list[4] = ROARDSP_CHAN_BACK_RIGHT; |
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| 212 | list[5] = ROARDSP_CHAN_LFE; |
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| 213 | break; |
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| 214 | case 7: |
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| 215 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 216 | list[1] = ROARDSP_CHAN_CENTER; |
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| 217 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 218 | list[3] = ROARDSP_CHAN_SIDE_LEFT; |
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| 219 | list[4] = ROARDSP_CHAN_SIDE_RIGHT; |
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| 220 | list[5] = ROARDSP_CHAN_BACK_CENTER; |
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| 221 | list[6] = ROARDSP_CHAN_LFE; |
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| 222 | break; |
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| 223 | case 8: |
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| 224 | list[0] = ROARDSP_CHAN_FRONT_LEFT; |
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| 225 | list[1] = ROARDSP_CHAN_CENTER; |
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| 226 | list[2] = ROARDSP_CHAN_FRONT_RIGHT; |
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| 227 | list[3] = ROARDSP_CHAN_SIDE_LEFT; |
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| 228 | list[4] = ROARDSP_CHAN_SIDE_RIGHT; |
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| 229 | list[5] = ROARDSP_CHAN_BACK_LEFT; |
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| 230 | list[6] = ROARDSP_CHAN_BACK_RIGHT; |
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| 231 | list[7] = ROARDSP_CHAN_LFE; |
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| 232 | break; |
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| 233 | default: |
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| 234 | return -1; |
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| 235 | break; |
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| 236 | } |
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| 237 | break; |
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| 238 | case ROARDSP_CHANLIST_MAP_OSS: |
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| 239 | switch (channels) { |
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| 240 | case 8: |
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| 241 | list[7] = ROARDSP_CHAN_BACK_RIGHT; |
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| 242 | case 7: |
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| 243 | list[6] = ROARDSP_CHAN_BACK_LEFT; |
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| 244 | case 6: |
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| 245 | list[5] = ROARDSP_CHAN_SIDE_RIGHT; |
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| 246 | case 5: |
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| 247 | list[4] = ROARDSP_CHAN_SIDE_LEFT; |
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| 248 | case 4: |
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| 249 | list[3] = ROARDSP_CHAN_LFE; |
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| 250 | case 3: |
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| 251 | list[2] = ROARDSP_CHAN_CENTER; |
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| 252 | list[1] = ROARDSP_CHAN_RIGHT; |
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| 253 | list[0] = ROARDSP_CHAN_LEFT; |
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| 254 | break; |
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| 255 | default: |
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| 256 | return -1; |
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| 257 | break; |
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| 258 | } |
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| 259 | break; |
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| 260 | case ROARDSP_CHANLIST_MAP_ALSA: |
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| 261 | // we guess: L,R,BL,BR,C,LFE,SL,SR (really, just guessing, see ALSA plugin of libao) |
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| 262 | switch (channels) { |
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| 263 | case 8: |
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| 264 | list[7] = ROARDSP_CHAN_BACK_RIGHT; |
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| 265 | case 7: |
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| 266 | list[6] = ROARDSP_CHAN_BACK_LEFT; |
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| 267 | case 6: |
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| 268 | list[5] = ROARDSP_CHAN_LFE; |
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| 269 | case 5: |
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| 270 | list[4] = ROARDSP_CHAN_CENTER; |
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| 271 | case 4: |
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| 272 | list[3] = ROARDSP_CHAN_BACK_RIGHT; |
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| 273 | case 3: |
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| 274 | list[2] = ROARDSP_CHAN_BACK_LEFT; |
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| 275 | list[1] = ROARDSP_CHAN_RIGHT; |
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| 276 | list[0] = ROARDSP_CHAN_LEFT; |
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| 277 | break; |
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| 278 | default: |
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| 279 | return -1; |
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| 280 | break; |
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| 281 | } |
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| 282 | break; |
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| 283 | case ROARDSP_CHANLIST_MAP_RIFF_WAVE: |
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| 284 | // here we are again, guessing: L,R,C,LFE,BL,BR,CL,CR,BC,SL,SR |
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| 285 | // strange, C, LFE on 4 channel file? |
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| 286 | // return -1 to be sure.... |
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| 287 | switch (channels) { |
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| 288 | default: |
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| 289 | return -1; |
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| 290 | break; |
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| 291 | } |
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| 292 | break; |
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| 293 | default: |
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| 294 | return -1; |
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| 295 | break; |
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| 296 | } |
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| 297 | |
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| 298 | return 0; |
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| 299 | } |
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| 300 | |
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[3329] | 301 | int roardsp_chanmap_calc(struct roardsp_chanmap * map, int what, int err_on_none) { |
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| 302 | int a, b; |
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| 303 | |
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| 304 | if ( map == NULL ) |
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| 305 | return -1; |
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| 306 | |
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| 307 | switch (what) { |
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| 308 | case ROARDSP_CHANMAP_MAP: |
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| 309 | memset(map->map, (char)-1, sizeof(map->map)); |
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| 310 | |
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| 311 | for (a = 0; a < ROAR_MAX_CHANNELS; a++) { |
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| 312 | if ( map->in[a] == ROARDSP_CHAN_NONE ) |
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| 313 | continue; |
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| 314 | |
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| 315 | for (b = 0; b < ROAR_MAX_CHANNELS; b++) { |
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| 316 | if ( map->in[a] == map->out[b] ) { |
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| 317 | map->map[a] = b; |
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| 318 | break; |
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| 319 | } |
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| 320 | } |
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| 321 | if ( b == ROAR_MAX_CHANNELS ) { // src not found in dest |
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| 322 | if ( err_on_none ) |
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| 323 | return -1; |
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| 324 | |
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| 325 | map->map[a] = -1; |
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| 326 | } |
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| 327 | } |
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| 328 | break; |
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| 329 | case ROARDSP_CHANMAP_IN: |
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| 330 | case ROARDSP_CHANMAP_OUT: |
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| 331 | default: |
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| 332 | return -1; |
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| 333 | break; |
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| 334 | } |
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| 335 | |
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| 336 | return 0; |
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| 337 | } |
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| 338 | |
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[3327] | 339 | //ll |
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