[0] | 1 | //convert.c: |
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| 2 | |
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[690] | 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 libroar 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 | * libroar 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 | * NOTE for everyone want's to change something and send patches: |
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| 24 | * read README and HACKING! There a addition information on |
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| 25 | * the license of this document you need to read before you send |
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| 26 | * any patches. |
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| 27 | * |
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| 28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 29 | * or libpulse*: |
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| 30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 31 | * and are therefore GPL. Because of this it may be illigal to use |
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| 32 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 33 | */ |
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| 34 | |
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[0] | 35 | #include "libroar.h" |
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| 36 | |
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| 37 | int roar_conv_bits (void * out, void * in, int samples, int from, int to) { |
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[845] | 38 | int format; |
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| 39 | |
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[0] | 40 | if ( from == to ) { |
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| 41 | if ( in == out ) |
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| 42 | return 0; |
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| 43 | |
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| 44 | memcpy(out, in, samples * from / 8); |
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| 45 | return 0; |
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| 46 | } |
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| 47 | |
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[845] | 48 | format = ((from / 8) << 4) + (to / 8); |
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[0] | 49 | |
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[845] | 50 | switch (format) { |
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[849] | 51 | case 0x12: return roar_conv_bits_8to16( out, in, samples); |
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| 52 | case 0x14: return roar_conv_bits_8to32( out, in, samples); |
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| 53 | case 0x21: return roar_conv_bits_16to8( out, in, samples); |
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[845] | 54 | case 0x24: return roar_conv_bits_16to32(out, in, samples); |
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[849] | 55 | case 0x41: return roar_conv_bits_32to8( out, in, samples); |
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[845] | 56 | case 0x42: return roar_conv_bits_32to16(out, in, samples); |
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| 57 | default: |
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| 58 | errno = ENOSYS; |
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| 59 | return -1; |
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| 60 | } |
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[0] | 61 | |
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| 62 | return -1; |
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| 63 | } |
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| 64 | |
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| 65 | int roar_conv_bits_8to16 (void * out, void * in, int samples) { |
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| 66 | char * ip = (char *)in; |
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| 67 | int16_t * op = (int16_t*)out; |
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| 68 | int i; |
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| 69 | |
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| 70 | for (i = samples - 1; i >= 0; i--) |
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| 71 | op[i] = ip[i] << 8; |
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| 72 | |
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| 73 | return 0; |
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| 74 | } |
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| 75 | |
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[845] | 76 | int roar_conv_bits_8to32 (void * out, void * in, int samples) { |
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| 77 | char * ip = (char *)in; |
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| 78 | int32_t * op = (int32_t*)out; |
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| 79 | int i; |
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| 80 | |
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| 81 | for (i = samples - 1; i >= 0; i--) |
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| 82 | op[i] = ip[i] << 24; |
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| 83 | |
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| 84 | return 0; |
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| 85 | } |
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| 86 | |
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[0] | 87 | int roar_conv_bits_16to8 (void * out, void * in, int samples) { |
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| 88 | int16_t * ip = (int16_t*)in; |
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| 89 | char * op = (char *)out; |
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| 90 | int i; |
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| 91 | |
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[624] | 92 | ROAR_DBG("roar_conv_bits_16to8(out=%p, in=%p, samples=%i) = ?", out, in, samples); |
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| 93 | |
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[0] | 94 | for (i = 0; i < samples; i++) |
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| 95 | op[i] = ip[i] >> 8; |
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| 96 | |
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| 97 | return 0; |
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| 98 | } |
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| 99 | |
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[845] | 100 | int roar_conv_bits_16to32 (void * out, void * in, int samples) { |
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| 101 | int16_t * ip = (int16_t*)in; |
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| 102 | int32_t * op = (int32_t*)out; |
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| 103 | int i; |
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| 104 | |
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| 105 | for (i = samples - 1; i >= 0; i--) |
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| 106 | op[i] = ip[i] << 16; |
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| 107 | |
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| 108 | return 0; |
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| 109 | } |
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| 110 | |
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| 111 | int roar_conv_bits_32to8 (void * out, void * in, int samples) { |
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| 112 | int32_t * ip = (int32_t*)in; |
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| 113 | char * op = (char *)out; |
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| 114 | int i; |
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| 115 | |
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| 116 | for (i = 0; i < samples; i++) |
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| 117 | op[i] = ip[i] >> 24; |
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| 118 | |
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| 119 | return 0; |
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| 120 | } |
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| 121 | |
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| 122 | int roar_conv_bits_32to16 (void * out, void * in, int samples) { |
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| 123 | int32_t * ip = (int32_t*)in; |
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| 124 | int16_t * op = (int16_t*)out; |
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| 125 | int i; |
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| 126 | |
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| 127 | for (i = 0; i < samples; i++) |
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| 128 | op[i] = ip[i] >> 16; |
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| 129 | |
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| 130 | return 0; |
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| 131 | } |
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[0] | 132 | |
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| 133 | int roar_conv_chans (void * out, void * in, int samples, int from, int to, int bits) { |
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[850] | 134 | if ( from == to ) { |
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| 135 | if ( in == out ) |
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| 136 | return 0; |
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| 137 | |
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| 138 | memcpy(out, in, samples * from * bits / 8); |
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| 139 | return 0; |
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| 140 | } |
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| 141 | |
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| 142 | switch (bits) { |
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| 143 | case 8: |
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| 144 | switch (from) { |
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| 145 | case 1: |
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| 146 | switch (to) { |
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| 147 | case 2: return roar_conv_chans_1to28(out, in, samples); |
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| 148 | default: return roar_conv_chans_1ton8(out, in, samples, to); |
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| 149 | } |
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| 150 | break; |
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| 151 | case 2: |
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| 152 | switch (to) { |
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| 153 | case 1: return roar_conv_chans_2to18(out, in, samples); |
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| 154 | default: return -1; |
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| 155 | } |
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| 156 | break; |
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| 157 | default: |
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| 158 | switch (to) { |
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| 159 | case 1: return roar_conv_chans_nto18(out, in, samples, from); |
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| 160 | default: return -1; |
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| 161 | } |
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| 162 | } |
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| 163 | break; |
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| 164 | case 16: |
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| 165 | switch (from) { |
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| 166 | case 1: |
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| 167 | switch (to) { |
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| 168 | case 2: return roar_conv_chans_1to216(out, in, samples); |
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| 169 | default: return roar_conv_chans_1ton16(out, in, samples, to); |
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| 170 | } |
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| 171 | break; |
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| 172 | case 2: |
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| 173 | switch (to) { |
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| 174 | case 1: return roar_conv_chans_2to116(out, in, samples); |
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| 175 | default: return -1; |
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| 176 | } |
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| 177 | break; |
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| 178 | default: |
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| 179 | switch (to) { |
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| 180 | case 1: return roar_conv_chans_nto116(out, in, samples, from); |
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| 181 | default: return -1; |
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| 182 | } |
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| 183 | } |
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| 184 | break; |
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| 185 | default: return -1; |
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[0] | 186 | } |
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| 187 | |
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| 188 | return -1; |
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| 189 | } |
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| 190 | |
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| 191 | int roar_conv_chans_1ton8 (void * out, void * in, int samples, int to) { |
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| 192 | char * ip = (char*) in, * op = (char*) out; |
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| 193 | int i; |
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| 194 | int c; |
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| 195 | |
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| 196 | for (i = samples - 1; i >= 0; i--) |
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| 197 | for (c = to - 1; c >= 0; c--) |
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| 198 | op[i*to + c] = ip[i]; |
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| 199 | |
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| 200 | return 0; |
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| 201 | } |
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| 202 | |
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[850] | 203 | int roar_conv_chans_1to28 (void * out, void * in, int samples) { |
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| 204 | char * ip = (char*) in, * op = (char*) out; |
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[852] | 205 | int i, h; |
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[850] | 206 | |
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[852] | 207 | samples--; |
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[850] | 208 | |
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[852] | 209 | for (i = (h = samples) * 2; i >= 0; i -= 2, h--) { |
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| 210 | op[i + 0] = ip[h]; |
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| 211 | op[i + 1] = ip[h]; |
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[850] | 212 | } |
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| 213 | |
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| 214 | return 0; |
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| 215 | } |
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| 216 | |
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[0] | 217 | int roar_conv_chans_1ton16 (void * out, void * in, int samples, int to) { |
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| 218 | int16_t * ip = (int16_t*) in, * op = (int16_t*) out; |
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| 219 | int i; |
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| 220 | int c; |
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| 221 | |
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| 222 | for (i = samples - 1; i >= 0; i--) |
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| 223 | for (c = to - 1; c >= 0; c--) |
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| 224 | op[i*to + c] = ip[i]; |
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| 225 | |
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| 226 | return 0; |
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| 227 | } |
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| 228 | |
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[850] | 229 | int roar_conv_chans_1to216 (void * out, void * in, int samples) { |
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| 230 | int16_t * ip = (int16_t*) in, * op = (int16_t*) out; |
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[852] | 231 | int i, h; |
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[850] | 232 | |
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[852] | 233 | samples--; |
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[850] | 234 | |
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[852] | 235 | for (i = (h = samples) * 2; i >= 0; i -= 2, h--) { |
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| 236 | op[i + 0] = ip[h]; |
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| 237 | op[i + 1] = ip[h]; |
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[850] | 238 | } |
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| 239 | |
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| 240 | return 0; |
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| 241 | } |
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| 242 | |
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[626] | 243 | int roar_conv_chans_nto18 (void * out, void * in, int samples, int from) { |
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| 244 | int8_t * ip = (int8_t*) in, * op = (int8_t*) out; |
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| 245 | int i; |
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| 246 | int c; |
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| 247 | register int s; |
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| 248 | |
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| 249 | samples /= from; |
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| 250 | |
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| 251 | for (i = samples - 1; i >= 0; i--) { |
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| 252 | s = 0; |
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| 253 | |
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| 254 | for (c = 0; c < from; c++) |
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| 255 | s += ip[i*from + c]; |
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| 256 | |
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| 257 | s /= from; |
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| 258 | op[i] = s; |
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| 259 | } |
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| 260 | |
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| 261 | return 0; |
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| 262 | } |
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| 263 | |
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[850] | 264 | int roar_conv_chans_2to18 (void * out, void * in, int samples) { |
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| 265 | int8_t * ip = (int8_t*) in, * op = (int8_t*) out; |
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[852] | 266 | int i, h; |
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[850] | 267 | |
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| 268 | samples -= 2; |
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| 269 | |
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[852] | 270 | for (h = (i = samples) / 2; i >= 0; i -= 2, h--) |
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| 271 | op[h] = ((int)ip[i + 0] + (int)ip[i + 1]) / 2; |
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[850] | 272 | |
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| 273 | return 0; |
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| 274 | } |
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| 275 | |
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[624] | 276 | int roar_conv_chans_nto116 (void * out, void * in, int samples, int from) { |
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| 277 | int16_t * ip = (int16_t*) in, * op = (int16_t*) out; |
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| 278 | int i; |
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| 279 | int c; |
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| 280 | register int s; |
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| 281 | |
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| 282 | samples /= from; |
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| 283 | |
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| 284 | for (i = samples - 1; i >= 0; i--) { |
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| 285 | s = 0; |
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| 286 | |
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| 287 | for (c = 0; c < from; c++) |
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| 288 | s += ip[i*from + c]; |
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| 289 | |
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| 290 | s /= from; |
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| 291 | op[i] = s; |
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| 292 | } |
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| 293 | |
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| 294 | return 0; |
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| 295 | } |
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| 296 | |
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[850] | 297 | int roar_conv_chans_2to116 (void * out, void * in, int samples) { |
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| 298 | int16_t * ip = (int16_t*) in, * op = (int16_t*) out; |
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[852] | 299 | int i, h; |
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[850] | 300 | |
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| 301 | samples -= 2; |
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| 302 | |
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[852] | 303 | for (h = (i = samples) / 2; i >= 0; i -= 2, h--) |
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| 304 | op[h] = ((int)ip[i + 0] + (int)ip[i + 1]) / 2; |
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[850] | 305 | |
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| 306 | return 0; |
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| 307 | } |
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| 308 | |
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[0] | 309 | int roar_conv_rate (void * out, void * in, int samples, int from, int to, int bits, int channels) { |
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| 310 | if ( bits == 8 ) |
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| 311 | return roar_conv_rate_8(out, in, samples, from, to, channels); |
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| 312 | |
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| 313 | if ( bits == 16 ) |
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| 314 | return roar_conv_rate_16(out, in, samples, from, to, channels); |
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| 315 | |
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| 316 | return -1; |
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| 317 | } |
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| 318 | |
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| 319 | int roar_conv_rate_8 (void * out, void * in, int samples, int from, int to, int channels) { |
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| 320 | return -1; |
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| 321 | } |
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[33] | 322 | |
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[0] | 323 | int roar_conv_rate_16 (void * out, void * in, int samples, int from, int to, int channels) { |
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[386] | 324 | if ( channels == 1 ) { |
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| 325 | printf("roar_conv_rate_16(): samples=%i -> %i, rate=%i -> %i\n", samples*from/to, samples, from, to); |
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| 326 | return roar_conv_poly4_16s((int16_t*) out, (int16_t*) in, samples, samples*from/to, (float)from/to); |
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| 327 | // return roar_conv_poly4_16((int16_t*) out, (int16_t*) in, samples*to/from, samples); |
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| 328 | } |
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| 329 | |
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[0] | 330 | return -1; |
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| 331 | } |
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| 332 | |
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| 333 | int raor_conv_codec (void * out, void * in, int samples, int from, int to, int bits) { |
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| 334 | int inbo = ROAR_CODEC_BYTE_ORDER(from), outbo = ROAR_CODEC_BYTE_ORDER(to); |
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| 335 | int ins = ROAR_CODEC_IS_SIGNED(from), outs = ROAR_CODEC_IS_SIGNED(to); |
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[858] | 336 | void * nin = in; |
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[0] | 337 | |
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[871] | 338 | if ( bits == 8 ) { |
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| 339 | inbo = outbo = ROAR_CODEC_NATIVE_ENDIAN; |
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| 340 | |
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| 341 | } else if ( bits == 16 ) { |
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[858] | 342 | if ( inbo == ROAR_CODEC_PDP ) |
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| 343 | inbo = ROAR_CODEC_LE; |
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| 344 | if ( outbo == ROAR_CODEC_PDP ) |
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| 345 | outbo = ROAR_CODEC_LE; |
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| 346 | } |
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| 347 | |
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[869] | 348 | ROAR_DBG("raor_conv_codec(out=%p, in=%p, samples=%i, from=%i(%s), to=%i(%s), bits=%i) = ?", |
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| 349 | out, in, samples, from, roar_codec2str(from), to, roar_codec2str(to), bits); |
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| 350 | |
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[858] | 351 | if ( inbo != outbo ) { |
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| 352 | if ( bits == 16 ) { |
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| 353 | // in this case we can only have LE vs. BE, so, only need to swap: |
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| 354 | roar_conv_endian_16(out, nin, samples); |
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| 355 | nin = out; |
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[868] | 356 | } else if ( bits == 24 ) { |
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| 357 | if ( (inbo == ROAR_CODEC_LE || inbo == ROAR_CODEC_BE) && (outbo == ROAR_CODEC_LE || outbo == ROAR_CODEC_BE) ) { |
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| 358 | roar_conv_endian_24(out, nin, samples); |
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| 359 | nin = out; |
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| 360 | } else { // what the hell is PDP eddines in 24 bit mode? |
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| 361 | return -1; |
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| 362 | } |
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[869] | 363 | } else if ( bits == 32 ) { |
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| 364 | if ( (inbo == ROAR_CODEC_LE || inbo == ROAR_CODEC_BE) && (outbo == ROAR_CODEC_LE || outbo == ROAR_CODEC_BE) ) { |
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| 365 | roar_conv_endian_32(out, nin, samples); |
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| 366 | nin = out; |
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| 367 | } else { // need to handle 32 PDP eddines here? |
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| 368 | return -1; |
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| 369 | } |
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[858] | 370 | } else { |
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| 371 | return -1; |
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| 372 | } |
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| 373 | } |
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[0] | 374 | |
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| 375 | if ( ins != outs ) { |
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| 376 | if ( ins && !outs ) { |
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[846] | 377 | switch (bits) { |
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[858] | 378 | case 8: roar_conv_codec_s2u8( out, nin, samples); break; |
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| 379 | case 16: roar_conv_codec_s2u16(out, nin, samples); break; |
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| 380 | case 32: roar_conv_codec_s2u32(out, nin, samples); break; |
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[846] | 381 | default: |
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| 382 | errno = ENOSYS; |
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| 383 | return -1; |
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| 384 | } |
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| 385 | } else if ( !ins && outs ) { |
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| 386 | switch (bits) { |
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[858] | 387 | case 8: roar_conv_codec_u2s8( out, nin, samples); break; |
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| 388 | case 16: roar_conv_codec_u2s16(out, nin, samples); break; |
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| 389 | case 32: roar_conv_codec_u2s32(out, nin, samples); break; |
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[846] | 390 | default: |
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| 391 | errno = ENOSYS; |
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| 392 | return -1; |
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[0] | 393 | } |
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| 394 | } else { |
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| 395 | return -1; |
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| 396 | } |
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| 397 | } |
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| 398 | |
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| 399 | return 0; |
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| 400 | } |
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| 401 | |
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| 402 | int roar_conv_codec_s2u8 (void * out, void * in, int samples) { |
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| 403 | char * ip = in; |
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| 404 | unsigned char * op = out; |
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| 405 | int i; |
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| 406 | |
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| 407 | for(i = 0; i < samples; i++) |
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| 408 | op[i] = ip[i] + 128; |
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| 409 | |
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| 410 | return 0; |
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| 411 | } |
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| 412 | |
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[633] | 413 | int roar_conv_codec_s2u16 (void * out, void * in, int samples) { |
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| 414 | int16_t * ip = in; |
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| 415 | uint16_t * op = out; |
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| 416 | int i; |
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| 417 | |
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| 418 | for(i = 0; i < samples; i++) |
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| 419 | op[i] = ip[i] + 32768; |
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| 420 | |
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| 421 | return 0; |
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| 422 | } |
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[0] | 423 | |
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[846] | 424 | int roar_conv_codec_s2u32 (void * out, void * in, int samples) { |
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| 425 | int32_t * ip = in; |
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| 426 | uint32_t * op = out; |
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| 427 | int i; |
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| 428 | |
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| 429 | for(i = 0; i < samples; i++) |
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| 430 | op[i] = ip[i] + 2147483648U; |
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| 431 | |
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| 432 | return 0; |
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| 433 | } |
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| 434 | |
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| 435 | int roar_conv_codec_u2s8 (void * out, void * in, int samples) { |
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| 436 | unsigned char * ip = in; |
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| 437 | char * op = out; |
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| 438 | int i; |
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| 439 | |
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| 440 | for(i = 0; i < samples; i++) |
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| 441 | op[i] = ip[i] - 128; |
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| 442 | |
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| 443 | return 0; |
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| 444 | } |
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| 445 | |
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| 446 | int roar_conv_codec_u2s16 (void * out, void * in, int samples) { |
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| 447 | uint16_t * ip = in; |
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| 448 | int16_t * op = out; |
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| 449 | int i; |
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| 450 | |
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| 451 | for(i = 0; i < samples; i++) |
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| 452 | op[i] = ip[i] - 32768; |
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| 453 | |
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| 454 | return 0; |
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| 455 | } |
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| 456 | |
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| 457 | int roar_conv_codec_u2s32 (void * out, void * in, int samples) { |
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| 458 | uint32_t * ip = in; |
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| 459 | int32_t * op = out; |
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| 460 | int i; |
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| 461 | |
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| 462 | for(i = 0; i < samples; i++) |
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| 463 | op[i] = ip[i] - 2147483648U; |
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| 464 | |
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| 465 | return 0; |
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| 466 | } |
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| 467 | |
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[857] | 468 | int roar_conv_endian_16 (void * out, void * in, int samples) { |
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| 469 | char * ip = in; |
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| 470 | char * op = out; |
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| 471 | register char c; |
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| 472 | int i; |
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| 473 | |
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| 474 | samples *= 2; |
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| 475 | |
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| 476 | if ( out != in ) { |
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[858] | 477 | // printf("out != in\n"); |
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[857] | 478 | for(i = 0; i < samples; i += 2) { |
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[858] | 479 | // printf("op[%i] = ip[%i]\nop[%i] = ip[%i]\n", i, i+1, i+1, i); |
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[857] | 480 | op[i ] = ip[i+1]; |
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| 481 | op[i+1] = ip[i ]; |
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| 482 | } |
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| 483 | } else { |
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[858] | 484 | // printf("out == in\n"); |
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[857] | 485 | for(i = 0; i < samples; i += 2) { |
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| 486 | c = ip[i+1]; |
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| 487 | op[i+1] = ip[i ]; |
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| 488 | op[i ] = c; |
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| 489 | } |
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| 490 | } |
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| 491 | |
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| 492 | return 0; |
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| 493 | } |
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| 494 | |
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[859] | 495 | int roar_conv_endian_24 (void * out, void * in, int samples) { |
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| 496 | char * ip = in; |
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| 497 | char * op = out; |
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| 498 | register char c; |
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| 499 | int i; |
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| 500 | |
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| 501 | samples *= 3; |
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| 502 | |
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| 503 | if ( out != in ) { |
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| 504 | // printf("out != in\n"); |
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| 505 | for(i = 0; i < samples; i += 3) { |
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| 506 | // printf("op[%i] = ip[%i]\nop[%i] = ip[%i]\n", i, i+1, i+1, i); |
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| 507 | op[i ] = ip[i+2]; |
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| 508 | op[i+2] = ip[i ]; |
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| 509 | } |
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| 510 | } else { |
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| 511 | // printf("out == in\n"); |
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| 512 | for(i = 0; i < samples; i += 3) { |
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| 513 | c = ip[i+2]; |
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| 514 | op[i+2] = ip[i ]; |
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| 515 | op[i ] = c; |
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| 516 | } |
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| 517 | } |
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| 518 | |
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| 519 | return 0; |
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| 520 | } |
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| 521 | |
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[869] | 522 | int roar_conv_endian_32 (void * out, void * in, int samples) { |
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| 523 | int32_t * ip = in; |
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| 524 | int32_t * op = out; |
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| 525 | union { |
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| 526 | int32_t val; |
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| 527 | char data[4]; |
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| 528 | } c, h; |
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| 529 | int i; |
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| 530 | |
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| 531 | // may the holly optimizer save our souls! |
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| 532 | |
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| 533 | ROAR_DBG("roar_conv_endian_32(out=%p, in=%p, samples=%i) = ?", out, in, samples); |
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| 534 | |
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| 535 | for (i = 0; i < samples; i++) { |
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| 536 | c.val = ip[i]; |
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| 537 | h.data[0] = c.data[3]; |
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| 538 | h.data[1] = c.data[2]; |
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| 539 | h.data[2] = c.data[1]; |
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| 540 | h.data[3] = c.data[0]; |
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| 541 | op[i] = h.val; |
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| 542 | } |
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| 543 | |
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| 544 | return 0; |
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| 545 | } |
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| 546 | |
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[0] | 547 | int roar_conv (void * out, void * in, int samples, struct roar_audio_info * from, struct roar_audio_info * to) { |
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| 548 | void * ip = in; |
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| 549 | |
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| 550 | // TODO: decide how to work around both in and out beeing to small to hold all |
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| 551 | // data between the steps. |
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| 552 | // for the moment: guess out >= in |
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| 553 | |
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| 554 | if ( from->bits != to->bits ) { |
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| 555 | if ( roar_conv_bits(out, ip, samples, from->bits, to->bits) == -1 ) |
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| 556 | return -1; |
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| 557 | else |
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| 558 | ip = out; |
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| 559 | } |
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| 560 | |
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[852] | 561 | if ( from->codec != to->codec ) { |
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| 562 | if ( raor_conv_codec (out, ip, samples, from->codec, to->codec, to->bits) == -1 ) |
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| 563 | return -1; |
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| 564 | else |
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| 565 | ip = out; |
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| 566 | } |
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| 567 | |
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[386] | 568 | if ( from->rate != to->rate ) { |
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| 569 | if ( roar_conv_rate(out, ip, samples, from->rate, to->rate, to->bits, from->channels) == -1 ) |
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[0] | 570 | return -1; |
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| 571 | else |
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| 572 | ip = out; |
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| 573 | } |
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| 574 | |
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[386] | 575 | if ( from->channels != to->channels ) { |
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| 576 | if ( roar_conv_chans(out, ip, samples, from->channels, to->channels, to->bits) == -1 ) |
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[0] | 577 | return -1; |
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| 578 | else |
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| 579 | ip = out; |
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| 580 | } |
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| 581 | |
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| 582 | return 0; |
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| 583 | } |
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| 584 | |
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[383] | 585 | |
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| 586 | |
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| 587 | int roar_conv_poly4_16 (int16_t * out, int16_t * in, size_t olen, size_t ilen) { |
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[386] | 588 | return roar_conv_poly4_16s(out, in, olen, ilen, (float)ilen/olen); |
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| 589 | } |
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| 590 | |
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| 591 | int roar_conv_poly4_16s (int16_t * out, int16_t * in, size_t olen, size_t ilen, float step) { |
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[383] | 592 | float poly[4]; |
---|
| 593 | float data[4]; |
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| 594 | float t = 0; |
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| 595 | int16_t * ci = in; |
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| 596 | int io, ii = 0; |
---|
| 597 | int i; |
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| 598 | |
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[386] | 599 | printf("step=%f\n", step); |
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| 600 | |
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[383] | 601 | // we can not make a poly4 with less than 4 points ;) |
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| 602 | if ( ilen < 4 ) |
---|
| 603 | return -1; |
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| 604 | |
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| 605 | for (i = 0; i < 4; i++) |
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| 606 | data[i] = ci[i]; |
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| 607 | roar_math_mkpoly_4x4(poly, data); |
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| 608 | /* |
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| 609 | printf("new poly: data[4] = {%f, %f, %f, %f}, poly[4] = {%f, %f, %f, %f}\n", |
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| 610 | data[0], data[1], data[2], data[3], |
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| 611 | poly[0], poly[1], poly[2], poly[3] |
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| 612 | ); |
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| 613 | */ |
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| 614 | |
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| 615 | //0 1 2 3 |
---|
| 616 | |
---|
| 617 | for (io = 0; io < olen; io++) { |
---|
| 618 | // printf("t=%f\n", t); |
---|
| 619 | out[io] = roar_math_cvpoly_4x4(poly, t); |
---|
| 620 | t += step; |
---|
| 621 | if ( t > 2 ) { // we need a new ploynome |
---|
| 622 | // printf("t > 2, need new data\n"); |
---|
| 623 | if ( (ii + 4) < ilen ) { // else: end of block. |
---|
| 624 | t -= 1; |
---|
| 625 | // printf("new data: ii=%i\n", ii); |
---|
| 626 | ii++; |
---|
| 627 | ci++; |
---|
| 628 | for (i = 0; i < 4; i++) |
---|
| 629 | data[i] = ci[i]; |
---|
| 630 | roar_math_mkpoly_4x4(poly, data); |
---|
| 631 | /* |
---|
| 632 | printf("new poly: data[4] = {%f, %f, %f, %f}, poly[4] = {%f, %f, %f, %f}\n", |
---|
| 633 | data[0], data[1], data[2], data[3], |
---|
| 634 | poly[0], poly[1], poly[2], poly[3] |
---|
| 635 | ); |
---|
| 636 | */ |
---|
| 637 | } |
---|
| 638 | } |
---|
| 639 | } |
---|
| 640 | |
---|
[386] | 641 | printf("io=%i\n", io); |
---|
| 642 | |
---|
[383] | 643 | return 0; |
---|
| 644 | } |
---|
| 645 | |
---|
[0] | 646 | //ll |
---|