[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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| 38 | if ( from == to ) { |
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| 39 | if ( in == out ) |
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| 40 | return 0; |
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| 41 | |
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| 42 | memcpy(out, in, samples * from / 8); |
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| 43 | return 0; |
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| 44 | } |
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| 45 | |
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| 46 | if ( from == 8 && to == 16 ) |
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| 47 | return roar_conv_bits_8to16(out, in, samples); |
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| 48 | |
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| 49 | if ( from == 16 && to == 8 ) |
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| 50 | return roar_conv_bits_16to8(out, in, samples); |
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| 51 | |
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| 52 | return -1; |
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| 53 | } |
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| 54 | |
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| 55 | int roar_conv_bits_8to16 (void * out, void * in, int samples) { |
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| 56 | char * ip = (char *)in; |
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| 57 | int16_t * op = (int16_t*)out; |
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| 58 | int i; |
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| 59 | |
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| 60 | for (i = samples - 1; i >= 0; i--) |
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| 61 | op[i] = ip[i] << 8; |
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| 62 | |
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| 63 | return 0; |
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| 64 | } |
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| 65 | |
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| 66 | int roar_conv_bits_16to8 (void * out, void * in, int samples) { |
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| 67 | int16_t * ip = (int16_t*)in; |
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| 68 | char * op = (char *)out; |
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| 69 | int i; |
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| 70 | |
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[624] | 71 | ROAR_DBG("roar_conv_bits_16to8(out=%p, in=%p, samples=%i) = ?", out, in, samples); |
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| 72 | |
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[0] | 73 | for (i = 0; i < samples; i++) |
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| 74 | op[i] = ip[i] >> 8; |
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| 75 | |
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| 76 | return 0; |
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| 77 | } |
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| 78 | |
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| 79 | |
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| 80 | int roar_conv_chans (void * out, void * in, int samples, int from, int to, int bits) { |
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| 81 | if ( from == 1 ) { |
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| 82 | if ( bits == 8 ) { |
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| 83 | return roar_conv_chans_1ton8(out, in, samples, to); |
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| 84 | } else if ( bits == 16 ) { |
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| 85 | return roar_conv_chans_1ton16(out, in, samples, to); |
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| 86 | } else { |
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| 87 | return -1; |
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| 88 | } |
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[624] | 89 | } else if ( to == 1 ) { |
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| 90 | if ( bits == 8 ) { |
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[626] | 91 | return roar_conv_chans_nto18(out, in, samples, from); |
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[624] | 92 | } else if ( bits == 16 ) { |
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| 93 | return roar_conv_chans_nto116(out, in, samples, from); |
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| 94 | } else { |
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| 95 | return -1; |
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| 96 | } |
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[0] | 97 | } |
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| 98 | |
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| 99 | return -1; |
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| 100 | } |
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| 101 | |
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| 102 | int roar_conv_chans_1ton8 (void * out, void * in, int samples, int to) { |
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| 103 | char * ip = (char*) in, * op = (char*) out; |
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| 104 | int i; |
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| 105 | int c; |
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| 106 | |
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| 107 | for (i = samples - 1; i >= 0; i--) |
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| 108 | for (c = to - 1; c >= 0; c--) |
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| 109 | op[i*to + c] = ip[i]; |
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| 110 | |
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| 111 | return 0; |
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| 112 | } |
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| 113 | |
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| 114 | int roar_conv_chans_1ton16 (void * out, void * in, int samples, int to) { |
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| 115 | int16_t * ip = (int16_t*) in, * op = (int16_t*) out; |
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| 116 | int i; |
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| 117 | int c; |
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| 118 | |
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| 119 | for (i = samples - 1; i >= 0; i--) |
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| 120 | for (c = to - 1; c >= 0; c--) |
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| 121 | op[i*to + c] = ip[i]; |
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| 122 | |
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| 123 | return 0; |
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| 124 | } |
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| 125 | |
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[626] | 126 | int roar_conv_chans_nto18 (void * out, void * in, int samples, int from) { |
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| 127 | int8_t * ip = (int8_t*) in, * op = (int8_t*) out; |
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| 128 | int i; |
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| 129 | int c; |
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| 130 | register int s; |
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| 131 | |
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| 132 | samples /= from; |
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| 133 | |
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| 134 | for (i = samples - 1; i >= 0; i--) { |
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| 135 | s = 0; |
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| 136 | |
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| 137 | for (c = 0; c < from; c++) |
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| 138 | s += ip[i*from + c]; |
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| 139 | |
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| 140 | s /= from; |
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| 141 | op[i] = s; |
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| 142 | } |
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| 143 | |
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| 144 | return 0; |
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| 145 | } |
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| 146 | |
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[624] | 147 | int roar_conv_chans_nto116 (void * out, void * in, int samples, int from) { |
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| 148 | int16_t * ip = (int16_t*) in, * op = (int16_t*) out; |
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| 149 | int i; |
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| 150 | int c; |
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| 151 | register int s; |
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| 152 | |
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| 153 | samples /= from; |
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| 154 | |
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| 155 | for (i = samples - 1; i >= 0; i--) { |
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| 156 | s = 0; |
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| 157 | |
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| 158 | for (c = 0; c < from; c++) |
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| 159 | s += ip[i*from + c]; |
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| 160 | |
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| 161 | s /= from; |
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| 162 | op[i] = s; |
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| 163 | } |
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| 164 | |
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| 165 | return 0; |
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| 166 | } |
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| 167 | |
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[0] | 168 | int roar_conv_rate (void * out, void * in, int samples, int from, int to, int bits, int channels) { |
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| 169 | if ( bits == 8 ) |
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| 170 | return roar_conv_rate_8(out, in, samples, from, to, channels); |
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| 171 | |
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| 172 | if ( bits == 16 ) |
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| 173 | return roar_conv_rate_16(out, in, samples, from, to, channels); |
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| 174 | |
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| 175 | return -1; |
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| 176 | } |
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| 177 | |
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| 178 | int roar_conv_rate_8 (void * out, void * in, int samples, int from, int to, int channels) { |
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| 179 | return -1; |
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| 180 | } |
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[33] | 181 | |
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[0] | 182 | int roar_conv_rate_16 (void * out, void * in, int samples, int from, int to, int channels) { |
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[386] | 183 | if ( channels == 1 ) { |
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| 184 | printf("roar_conv_rate_16(): samples=%i -> %i, rate=%i -> %i\n", samples*from/to, samples, from, to); |
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| 185 | return roar_conv_poly4_16s((int16_t*) out, (int16_t*) in, samples, samples*from/to, (float)from/to); |
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| 186 | // return roar_conv_poly4_16((int16_t*) out, (int16_t*) in, samples*to/from, samples); |
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| 187 | } |
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| 188 | |
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[0] | 189 | return -1; |
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| 190 | } |
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| 191 | |
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| 192 | int raor_conv_codec (void * out, void * in, int samples, int from, int to, int bits) { |
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| 193 | int inbo = ROAR_CODEC_BYTE_ORDER(from), outbo = ROAR_CODEC_BYTE_ORDER(to); |
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| 194 | int ins = ROAR_CODEC_IS_SIGNED(from), outs = ROAR_CODEC_IS_SIGNED(to); |
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| 195 | |
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| 196 | if ( inbo != outbo ) |
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| 197 | return -1; |
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| 198 | |
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| 199 | if ( ins != outs ) { |
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| 200 | if ( ins && !outs ) { |
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| 201 | if ( bits == 8 ) { |
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| 202 | roar_conv_codec_s2u8(out, in, samples); |
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[633] | 203 | } else if ( bits == 16 ) { |
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| 204 | roar_conv_codec_s2u16(out, in, samples); |
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[0] | 205 | } else { |
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| 206 | return -1; |
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| 207 | } |
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| 208 | } else { |
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| 209 | return -1; |
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| 210 | } |
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| 211 | } |
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| 212 | |
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| 213 | return 0; |
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| 214 | } |
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| 215 | |
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| 216 | int roar_conv_codec_s2u8 (void * out, void * in, int samples) { |
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| 217 | char * ip = in; |
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| 218 | unsigned char * op = out; |
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| 219 | int i; |
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| 220 | |
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| 221 | for(i = 0; i < samples; i++) |
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| 222 | op[i] = ip[i] + 128; |
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| 223 | |
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| 224 | return 0; |
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| 225 | } |
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| 226 | |
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[633] | 227 | int roar_conv_codec_s2u16 (void * out, void * in, int samples) { |
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| 228 | int16_t * ip = in; |
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| 229 | uint16_t * op = out; |
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| 230 | int i; |
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| 231 | |
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| 232 | for(i = 0; i < samples; i++) |
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| 233 | op[i] = ip[i] + 32768; |
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| 234 | |
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| 235 | return 0; |
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| 236 | } |
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[0] | 237 | |
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| 238 | int roar_conv (void * out, void * in, int samples, struct roar_audio_info * from, struct roar_audio_info * to) { |
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| 239 | void * ip = in; |
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| 240 | |
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| 241 | // TODO: decide how to work around both in and out beeing to small to hold all |
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| 242 | // data between the steps. |
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| 243 | // for the moment: guess out >= in |
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| 244 | |
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| 245 | if ( from->bits != to->bits ) { |
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| 246 | if ( roar_conv_bits(out, ip, samples, from->bits, to->bits) == -1 ) |
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| 247 | return -1; |
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| 248 | else |
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| 249 | ip = out; |
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| 250 | } |
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| 251 | |
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[386] | 252 | if ( from->rate != to->rate ) { |
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| 253 | if ( roar_conv_rate(out, ip, samples, from->rate, to->rate, to->bits, from->channels) == -1 ) |
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[0] | 254 | return -1; |
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| 255 | else |
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| 256 | ip = out; |
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| 257 | } |
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| 258 | |
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[386] | 259 | if ( from->channels != to->channels ) { |
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| 260 | if ( roar_conv_chans(out, ip, samples, from->channels, to->channels, to->bits) == -1 ) |
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[0] | 261 | return -1; |
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| 262 | else |
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| 263 | ip = out; |
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| 264 | } |
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| 265 | |
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[629] | 266 | if ( from->codec != to->codec ) { |
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| 267 | if ( raor_conv_codec (out, ip, samples, from->codec, to->codec, to->bits) == -1 ) |
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| 268 | return -1; |
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| 269 | else |
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| 270 | ip = out; |
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| 271 | } |
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[0] | 272 | |
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| 273 | return 0; |
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| 274 | } |
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| 275 | |
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[383] | 276 | |
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| 277 | |
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| 278 | int roar_conv_poly4_16 (int16_t * out, int16_t * in, size_t olen, size_t ilen) { |
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[386] | 279 | return roar_conv_poly4_16s(out, in, olen, ilen, (float)ilen/olen); |
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| 280 | } |
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| 281 | |
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| 282 | int roar_conv_poly4_16s (int16_t * out, int16_t * in, size_t olen, size_t ilen, float step) { |
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[383] | 283 | float poly[4]; |
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| 284 | float data[4]; |
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| 285 | float t = 0; |
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| 286 | int16_t * ci = in; |
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| 287 | int io, ii = 0; |
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| 288 | int i; |
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| 289 | |
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[386] | 290 | printf("step=%f\n", step); |
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| 291 | |
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[383] | 292 | // we can not make a poly4 with less than 4 points ;) |
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| 293 | if ( ilen < 4 ) |
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| 294 | return -1; |
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| 295 | |
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| 296 | for (i = 0; i < 4; i++) |
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| 297 | data[i] = ci[i]; |
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| 298 | roar_math_mkpoly_4x4(poly, data); |
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| 299 | /* |
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| 300 | printf("new poly: data[4] = {%f, %f, %f, %f}, poly[4] = {%f, %f, %f, %f}\n", |
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| 301 | data[0], data[1], data[2], data[3], |
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| 302 | poly[0], poly[1], poly[2], poly[3] |
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| 303 | ); |
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| 304 | */ |
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| 305 | |
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| 306 | //0 1 2 3 |
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| 307 | |
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| 308 | for (io = 0; io < olen; io++) { |
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| 309 | // printf("t=%f\n", t); |
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| 310 | out[io] = roar_math_cvpoly_4x4(poly, t); |
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| 311 | t += step; |
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| 312 | if ( t > 2 ) { // we need a new ploynome |
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| 313 | // printf("t > 2, need new data\n"); |
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| 314 | if ( (ii + 4) < ilen ) { // else: end of block. |
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| 315 | t -= 1; |
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| 316 | // printf("new data: ii=%i\n", ii); |
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| 317 | ii++; |
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| 318 | ci++; |
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| 319 | for (i = 0; i < 4; i++) |
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| 320 | data[i] = ci[i]; |
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| 321 | roar_math_mkpoly_4x4(poly, data); |
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| 322 | /* |
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| 323 | printf("new poly: data[4] = {%f, %f, %f, %f}, poly[4] = {%f, %f, %f, %f}\n", |
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| 324 | data[0], data[1], data[2], data[3], |
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| 325 | poly[0], poly[1], poly[2], poly[3] |
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| 326 | ); |
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| 327 | */ |
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| 328 | } |
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| 329 | } |
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| 330 | } |
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| 331 | |
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[386] | 332 | printf("io=%i\n", io); |
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| 333 | |
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[383] | 334 | return 0; |
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| 335 | } |
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| 336 | |
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[0] | 337 | //ll |
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