1 | //convert.c: |
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2 | |
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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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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 | int format; |
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39 | |
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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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48 | format = ((from / 8) << 4) + (to / 8); |
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49 | |
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50 | switch (format) { |
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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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54 | case 0x24: return roar_conv_bits_16to32(out, in, samples); |
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55 | case 0x41: return roar_conv_bits_32to8( out, in, samples); |
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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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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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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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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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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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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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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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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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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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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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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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205 | int i, h; |
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206 | |
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207 | samples--; |
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208 | |
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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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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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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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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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231 | int i, h; |
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232 | |
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233 | samples--; |
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234 | |
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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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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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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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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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266 | int i, h; |
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267 | |
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268 | samples -= 2; |
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269 | |
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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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272 | |
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273 | return 0; |
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274 | } |
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275 | |
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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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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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299 | int i, h; |
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300 | |
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301 | samples -= 2; |
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302 | |
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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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305 | |
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306 | return 0; |
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307 | } |
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308 | |
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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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322 | |
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323 | int roar_conv_rate_16 (void * out, void * in, int samples, int from, int to, int channels) { |
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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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330 | return -1; |
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331 | } |
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332 | |
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333 | int roar_conv_signedness (void * out, void * in, int samples, int from, int to, int bits) { |
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334 | |
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335 | if ( from != to ) { |
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336 | if ( from && !to ) { |
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337 | switch (bits) { |
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338 | case 8: roar_conv_codec_s2u8( out, in, samples); break; |
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339 | case 16: roar_conv_codec_s2u16(out, in, samples); break; |
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340 | case 32: roar_conv_codec_s2u32(out, in, samples); break; |
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341 | default: |
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342 | errno = ENOSYS; |
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343 | return -1; |
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344 | } |
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345 | } else if ( !from && to ) { |
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346 | switch (bits) { |
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347 | case 8: roar_conv_codec_u2s8( out, in, samples); break; |
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348 | case 16: roar_conv_codec_u2s16(out, in, samples); break; |
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349 | case 32: roar_conv_codec_u2s32(out, in, samples); break; |
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350 | default: |
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351 | errno = ENOSYS; |
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352 | return -1; |
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353 | } |
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354 | } else { |
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355 | return -1; |
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356 | } |
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357 | } else { |
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358 | if ( out == in ) |
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359 | return 0; |
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360 | |
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361 | memcpy(out, in, samples * bits / 8); |
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362 | return 0; |
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363 | } |
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364 | |
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365 | return 0; |
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366 | } |
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367 | |
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368 | int roar_conv_codec (void * out, void * in, int samples, int from, int to, int bits) { |
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369 | int inbo = ROAR_CODEC_BYTE_ORDER(from), outbo = ROAR_CODEC_BYTE_ORDER(to); |
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370 | int ins = ROAR_CODEC_IS_SIGNED(from), outs = ROAR_CODEC_IS_SIGNED(to); |
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371 | void * nin = in; |
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372 | |
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373 | |
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374 | ROAR_DBG("roar_conv_codec(out=%p, in=%p, samples=%i, from=%i(%s), to=%i(%s), bits=%i) = ?", |
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375 | out, in, samples, from, roar_codec2str(from), to, roar_codec2str(to), bits); |
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376 | |
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377 | roar_conv_endian(out, in, samples, inbo, outbo, bits); |
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378 | nin = out; |
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379 | |
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380 | return roar_conv_signedness(out, in, samples, ins, outs, bits); |
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381 | } |
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382 | |
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383 | int roar_conv_codec_s2u8 (void * out, void * in, int samples) { |
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384 | char * ip = in; |
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385 | unsigned char * op = out; |
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386 | int i; |
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387 | |
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388 | for(i = 0; i < samples; i++) |
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389 | op[i] = ip[i] + 128; |
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390 | |
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391 | return 0; |
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392 | } |
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393 | |
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394 | int roar_conv_codec_s2u16 (void * out, void * in, int samples) { |
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395 | int16_t * ip = in; |
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396 | uint16_t * op = out; |
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397 | int i; |
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398 | |
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399 | for(i = 0; i < samples; i++) |
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400 | op[i] = ip[i] + 32768; |
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401 | |
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402 | return 0; |
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403 | } |
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404 | |
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405 | int roar_conv_codec_s2u32 (void * out, void * in, int samples) { |
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406 | int32_t * ip = in; |
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407 | uint32_t * op = out; |
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408 | int i; |
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409 | |
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410 | for(i = 0; i < samples; i++) |
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411 | op[i] = ip[i] + 2147483648U; |
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412 | |
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413 | return 0; |
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414 | } |
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415 | |
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416 | int roar_conv_codec_u2s8 (void * out, void * in, int samples) { |
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417 | unsigned char * ip = in; |
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418 | char * op = out; |
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419 | int i; |
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420 | |
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421 | for(i = 0; i < samples; i++) |
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422 | op[i] = ip[i] - 128; |
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423 | |
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424 | return 0; |
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425 | } |
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426 | |
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427 | int roar_conv_codec_u2s16 (void * out, void * in, int samples) { |
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428 | uint16_t * ip = in; |
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429 | int16_t * op = out; |
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430 | int i; |
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431 | |
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432 | for(i = 0; i < samples; i++) |
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433 | op[i] = ip[i] - 32768; |
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434 | |
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435 | return 0; |
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436 | } |
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437 | |
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438 | int roar_conv_codec_u2s32 (void * out, void * in, int samples) { |
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439 | uint32_t * ip = in; |
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440 | int32_t * op = out; |
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441 | int i; |
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442 | |
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443 | for(i = 0; i < samples; i++) |
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444 | op[i] = ip[i] - 2147483648U; |
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445 | |
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446 | return 0; |
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447 | } |
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448 | |
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449 | |
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450 | int roar_conv_endian (void * out, void * in, int samples, int from, int to, int bits) { |
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451 | |
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452 | if ( bits == 8 ) { |
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453 | from = to = ROAR_CODEC_NATIVE_ENDIAN; |
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454 | |
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455 | } else if ( bits == 16 ) { |
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456 | if ( from == ROAR_CODEC_PDP ) |
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457 | from = ROAR_CODEC_LE; |
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458 | if ( to == ROAR_CODEC_PDP ) |
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459 | to = ROAR_CODEC_LE; |
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460 | } |
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461 | |
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462 | ROAR_DBG("roar_conv_endian(out=%p, in=%p, samples=%i, from=%i, to=%i, bits=%i) = ?", out, in, samples, from, to, bits); |
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463 | |
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464 | if ( from == to ) { |
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465 | if ( in != out ) { |
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466 | memcpy(out, in, samples * bits / 8); |
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467 | } |
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468 | return 0; |
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469 | } else { |
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470 | if ( bits == 16 ) { |
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471 | // in this case we can only have LE vs. BE, so, only need to swap: |
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472 | ROAR_DBG("roar_conv_endian(*): Doing 16 bit byteswap"); |
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473 | return roar_conv_endian_16(out, in, samples); |
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474 | } else if ( bits == 24 ) { |
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475 | if ( (from == ROAR_CODEC_LE || from == ROAR_CODEC_BE) && (to == ROAR_CODEC_LE || to == ROAR_CODEC_BE) ) { |
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476 | return roar_conv_endian_24(out, in, samples); |
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477 | } else { // what the hell is PDP eddines in 24 bit mode? |
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478 | return -1; |
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479 | } |
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480 | } else if ( bits == 32 ) { |
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481 | if ( (from == ROAR_CODEC_LE || from == ROAR_CODEC_BE) && (to == ROAR_CODEC_LE || to == ROAR_CODEC_BE) ) { |
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482 | return roar_conv_endian_32(out, in, samples); |
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483 | } else { // need to handle 32 PDP eddines here? |
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484 | return -1; |
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485 | } |
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486 | } else { |
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487 | return -1; |
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488 | } |
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489 | } |
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490 | |
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491 | return -1; |
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492 | } |
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493 | |
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494 | |
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495 | int roar_conv_endian_16 (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 *= 2; |
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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 += 2) { |
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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+1]; |
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508 | op[i+1] = ip[i ]; |
---|
509 | } |
---|
510 | } else { |
---|
511 | // printf("out == in\n"); |
---|
512 | for(i = 0; i < samples; i += 2) { |
---|
513 | c = ip[i+1]; |
---|
514 | op[i+1] = ip[i ]; |
---|
515 | op[i ] = c; |
---|
516 | } |
---|
517 | } |
---|
518 | |
---|
519 | return 0; |
---|
520 | } |
---|
521 | |
---|
522 | int roar_conv_endian_24 (void * out, void * in, int samples) { |
---|
523 | char * ip = in; |
---|
524 | char * op = out; |
---|
525 | register char c; |
---|
526 | int i; |
---|
527 | |
---|
528 | samples *= 3; |
---|
529 | |
---|
530 | if ( out != in ) { |
---|
531 | // printf("out != in\n"); |
---|
532 | for(i = 0; i < samples; i += 3) { |
---|
533 | // printf("op[%i] = ip[%i]\nop[%i] = ip[%i]\n", i, i+1, i+1, i); |
---|
534 | op[i ] = ip[i+2]; |
---|
535 | op[i+2] = ip[i ]; |
---|
536 | } |
---|
537 | } else { |
---|
538 | // printf("out == in\n"); |
---|
539 | for(i = 0; i < samples; i += 3) { |
---|
540 | c = ip[i+2]; |
---|
541 | op[i+2] = ip[i ]; |
---|
542 | op[i ] = c; |
---|
543 | } |
---|
544 | } |
---|
545 | |
---|
546 | return 0; |
---|
547 | } |
---|
548 | |
---|
549 | int roar_conv_endian_32 (void * out, void * in, int samples) { |
---|
550 | int32_t * ip = in; |
---|
551 | int32_t * op = out; |
---|
552 | union { |
---|
553 | int32_t val; |
---|
554 | char data[4]; |
---|
555 | } c, h; |
---|
556 | int i; |
---|
557 | |
---|
558 | // may the holly optimizer save our souls! |
---|
559 | |
---|
560 | ROAR_DBG("roar_conv_endian_32(out=%p, in=%p, samples=%i) = ?", out, in, samples); |
---|
561 | |
---|
562 | for (i = 0; i < samples; i++) { |
---|
563 | c.val = ip[i]; |
---|
564 | h.data[0] = c.data[3]; |
---|
565 | h.data[1] = c.data[2]; |
---|
566 | h.data[2] = c.data[1]; |
---|
567 | h.data[3] = c.data[0]; |
---|
568 | op[i] = h.val; |
---|
569 | } |
---|
570 | |
---|
571 | return 0; |
---|
572 | } |
---|
573 | |
---|
574 | int roar_conv (void * out, void * in, int samples, struct roar_audio_info * from, struct roar_audio_info * to) { |
---|
575 | void * ip = in; |
---|
576 | |
---|
577 | // TODO: decide how to work around both in and out beeing to small to hold all |
---|
578 | // data between the steps. |
---|
579 | // for the moment: guess out >= in |
---|
580 | |
---|
581 | ROAR_DBG("roar_conv(*): bo conv: %i->%i(native)", ROAR_CODEC_BYTE_ORDER(from->codec), ROAR_CODEC_NATIVE_ENDIAN); |
---|
582 | |
---|
583 | if ( ROAR_CODEC_BYTE_ORDER(from->codec) != ROAR_CODEC_NATIVE_ENDIAN ) { |
---|
584 | ROAR_DBG("roar_conv(*): doing bo input conv"); |
---|
585 | if ( roar_conv_endian(out, ip, samples, ROAR_CODEC_BYTE_ORDER(from->codec), ROAR_CODEC_NATIVE_ENDIAN, from->bits) == -1 ) |
---|
586 | return -1; |
---|
587 | else |
---|
588 | ip = out; |
---|
589 | } |
---|
590 | |
---|
591 | if ( from->bits != to->bits ) { |
---|
592 | if ( roar_conv_bits(out, ip, samples, from->bits, to->bits) == -1 ) |
---|
593 | return -1; |
---|
594 | else |
---|
595 | ip = out; |
---|
596 | } |
---|
597 | |
---|
598 | if ( ROAR_CODEC_IS_SIGNED(from->codec) != ROAR_CODEC_IS_SIGNED(to->codec) ) { |
---|
599 | if ( roar_conv_signedness(out, ip, samples, ROAR_CODEC_IS_SIGNED(from->codec), ROAR_CODEC_IS_SIGNED(to->codec), to->bits) == -1 ) |
---|
600 | return -1; |
---|
601 | else |
---|
602 | ip = out; |
---|
603 | } |
---|
604 | |
---|
605 | /* |
---|
606 | if ( from->codec != to->codec ) { |
---|
607 | if ( roar_conv_codec (out, ip, samples, from->codec, to->codec, to->bits) == -1 ) |
---|
608 | return -1; |
---|
609 | else |
---|
610 | ip = out; |
---|
611 | } |
---|
612 | */ |
---|
613 | |
---|
614 | if ( from->rate != to->rate ) { |
---|
615 | if ( roar_conv_rate(out, ip, samples, from->rate, to->rate, to->bits, from->channels) == -1 ) |
---|
616 | return -1; |
---|
617 | else |
---|
618 | ip = out; |
---|
619 | } |
---|
620 | |
---|
621 | if ( from->channels != to->channels ) { |
---|
622 | if ( roar_conv_chans(out, ip, samples, from->channels, to->channels, to->bits) == -1 ) |
---|
623 | return -1; |
---|
624 | else |
---|
625 | ip = out; |
---|
626 | } |
---|
627 | |
---|
628 | if ( ROAR_CODEC_BYTE_ORDER(to->codec) != ROAR_CODEC_NATIVE_ENDIAN ) { |
---|
629 | if ( roar_conv_endian(out, ip, samples, ROAR_CODEC_NATIVE_ENDIAN, ROAR_CODEC_BYTE_ORDER(to->codec), to->bits) == -1 ) |
---|
630 | return -1; |
---|
631 | else |
---|
632 | ip = out; |
---|
633 | } |
---|
634 | |
---|
635 | return 0; |
---|
636 | } |
---|
637 | |
---|
638 | |
---|
639 | |
---|
640 | int roar_conv_poly4_16 (int16_t * out, int16_t * in, size_t olen, size_t ilen) { |
---|
641 | return roar_conv_poly4_16s(out, in, olen, ilen, (float)ilen/olen); |
---|
642 | } |
---|
643 | |
---|
644 | int roar_conv_poly4_16s (int16_t * out, int16_t * in, size_t olen, size_t ilen, float step) { |
---|
645 | float poly[4]; |
---|
646 | float data[4]; |
---|
647 | float t = 0; |
---|
648 | int16_t * ci = in; |
---|
649 | int io, ii = 0; |
---|
650 | int i; |
---|
651 | |
---|
652 | printf("step=%f\n", step); |
---|
653 | |
---|
654 | // we can not make a poly4 with less than 4 points ;) |
---|
655 | if ( ilen < 4 ) |
---|
656 | return -1; |
---|
657 | |
---|
658 | for (i = 0; i < 4; i++) |
---|
659 | data[i] = ci[i]; |
---|
660 | roar_math_mkpoly_4x4(poly, data); |
---|
661 | /* |
---|
662 | printf("new poly: data[4] = {%f, %f, %f, %f}, poly[4] = {%f, %f, %f, %f}\n", |
---|
663 | data[0], data[1], data[2], data[3], |
---|
664 | poly[0], poly[1], poly[2], poly[3] |
---|
665 | ); |
---|
666 | */ |
---|
667 | |
---|
668 | //0 1 2 3 |
---|
669 | |
---|
670 | for (io = 0; io < olen; io++) { |
---|
671 | // printf("t=%f\n", t); |
---|
672 | out[io] = roar_math_cvpoly_4x4(poly, t); |
---|
673 | t += step; |
---|
674 | if ( t > 2 ) { // we need a new ploynome |
---|
675 | // printf("t > 2, need new data\n"); |
---|
676 | if ( (ii + 4) < ilen ) { // else: end of block. |
---|
677 | t -= 1; |
---|
678 | // printf("new data: ii=%i\n", ii); |
---|
679 | ii++; |
---|
680 | ci++; |
---|
681 | for (i = 0; i < 4; i++) |
---|
682 | data[i] = ci[i]; |
---|
683 | roar_math_mkpoly_4x4(poly, data); |
---|
684 | /* |
---|
685 | printf("new poly: data[4] = {%f, %f, %f, %f}, poly[4] = {%f, %f, %f, %f}\n", |
---|
686 | data[0], data[1], data[2], data[3], |
---|
687 | poly[0], poly[1], poly[2], poly[3] |
---|
688 | ); |
---|
689 | */ |
---|
690 | } |
---|
691 | } |
---|
692 | } |
---|
693 | |
---|
694 | printf("io=%i\n", io); |
---|
695 | |
---|
696 | return 0; |
---|
697 | } |
---|
698 | |
---|
699 | //ll |
---|