1 | //vio_rtp.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010 |
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5 | * |
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6 | * This file is part of 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_vio_open_rtp (struct roar_vio_calls * calls, struct roar_vio_calls * dst, |
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38 | char * dstr, struct roar_vio_defaults * odef) { |
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39 | struct roar_rtp_inst * self = NULL; |
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40 | |
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41 | if ( calls == NULL || dst == NULL ) |
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42 | return -1; |
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43 | |
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44 | if ( (self = roar_mm_malloc(sizeof(struct roar_rtp_inst))) == NULL ) |
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45 | return -1; |
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46 | |
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47 | memset(self, 0, sizeof(struct roar_rtp_inst)); |
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48 | |
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49 | self->vio = dst; |
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50 | |
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51 | self->header.version = 2; |
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52 | self->header.payload_type = ROAR_RTP_PT_UNKNOWN; |
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53 | |
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54 | memset(calls, 0, sizeof(struct roar_vio_calls)); |
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55 | |
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56 | calls->inst = self; |
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57 | // calls->read = roar_vio_rtp_read; |
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58 | // calls->write = roar_vio_rtp_write; |
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59 | // calls->lseek = roar_vio_rtp_lseek; |
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60 | calls->nonblock = roar_vio_rtp_nonblock; |
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61 | calls->sync = roar_vio_rtp_sync; |
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62 | calls->ctl = roar_vio_rtp_ctl; |
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63 | calls->close = roar_vio_rtp_close; |
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64 | |
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65 | return 0; |
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66 | } |
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67 | |
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68 | ssize_t roar_vio_rtp_read (struct roar_vio_calls * vio, void *buf, size_t count); |
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69 | ssize_t roar_vio_rtp_write (struct roar_vio_calls * vio, void *buf, size_t count) { |
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70 | struct roar_rtp_inst * self = vio->inst; |
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71 | size_t len_need = count + sizeof(struct roar_rtp_header); // this is a bit more than we need |
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72 | // we ignore this at the moment |
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73 | size_t len_have; |
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74 | union { |
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75 | void * vp; |
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76 | char * cp; |
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77 | uint16_t * u16; |
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78 | uint32_t * u32; |
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79 | } data; |
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80 | size_t dataoffset; |
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81 | ssize_t ret; |
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82 | int i; |
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83 | |
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84 | if ( self->tx == NULL ) { |
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85 | if ( roar_buffer_new(&(self->tx), len_need) == -1 ) |
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86 | return -1; |
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87 | |
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88 | len_have = len_need; |
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89 | } else { |
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90 | if ( roar_buffer_get_len(self->tx, &len_have) == -1 ) |
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91 | return -1; |
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92 | |
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93 | if ( len_have < len_need ) { |
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94 | if ( roar_buffer_set_len(self->tx, len_need) == -1 ) { |
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95 | if ( roar_buffer_free(self->tx) == -1 ) |
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96 | return -1; |
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97 | |
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98 | self->tx = NULL; |
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99 | return roar_vio_rtp_write(vio, buf, count); // restart ower self from the beginning with no buffer |
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100 | } |
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101 | } |
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102 | } |
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103 | |
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104 | if ( roar_buffer_get_data(self->tx, &(data.vp)) == -1 ) |
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105 | return -1; |
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106 | |
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107 | memset(data.vp, 0, len_need); |
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108 | |
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109 | data.cp[0] = 2; |
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110 | data.cp[0] |= self->header.csrc_count << 4; |
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111 | data.cp[1] |= self->header.payload_type << 1; |
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112 | |
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113 | data.u16[1] = self->header.seq_num; |
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114 | |
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115 | data.u32[1] = self->header.ts; |
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116 | data.u32[2] = self->header.ssrc; |
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117 | |
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118 | for (i = 0; i < self->header.csrc_count; i++) { |
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119 | data.u32[3+i] = self->header.csrc[i]; |
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120 | } |
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121 | |
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122 | dataoffset = 3*4 + self->header.csrc_count*4; |
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123 | |
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124 | memcpy(data.vp + dataoffset, buf, count); |
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125 | |
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126 | if ( (ret = roar_vio_write(self->vio, data.vp, count+dataoffset)) == -1 ) |
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127 | return -1; |
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128 | |
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129 | return ret - dataoffset; |
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130 | } |
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131 | |
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132 | off_t roar_vio_rtp_lseek (struct roar_vio_calls * vio, off_t offset, int whence); |
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133 | |
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134 | int roar_vio_rtp_nonblock(struct roar_vio_calls * vio, int state) { |
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135 | struct roar_rtp_inst * self = vio->inst; |
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136 | |
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137 | return roar_vio_nonblock(self->vio, state); |
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138 | } |
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139 | |
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140 | int roar_vio_rtp_sync (struct roar_vio_calls * vio) { |
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141 | struct roar_rtp_inst * self = vio->inst; |
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142 | |
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143 | return roar_vio_sync(self->vio); |
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144 | } |
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145 | |
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146 | int roar_vio_rtp_ctl (struct roar_vio_calls * vio, int cmd, void * data) { |
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147 | struct roar_rtp_inst * self = vio->inst; |
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148 | |
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149 | if (vio == NULL || cmd == -1) |
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150 | return -1; |
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151 | |
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152 | switch (cmd) { |
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153 | case ROAR_VIO_CTL_GET_NEXT: |
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154 | *(struct roar_vio_calls **)data = self->vio; |
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155 | return 0; |
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156 | break; |
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157 | case ROAR_VIO_CTL_SET_NEXT: |
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158 | self->vio = *(struct roar_vio_calls **)data; |
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159 | return 0; |
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160 | break; |
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161 | } |
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162 | |
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163 | return roar_vio_ctl(self->vio, cmd, data); |
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164 | } |
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165 | |
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166 | int roar_vio_rtp_close (struct roar_vio_calls * vio) { |
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167 | struct roar_rtp_inst * self = vio->inst; |
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168 | int ret; |
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169 | |
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170 | ret = roar_vio_close(self->vio); |
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171 | |
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172 | if ( self->tx != NULL ) |
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173 | if ( roar_buffer_free(self->tx) == -1 ) |
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174 | ret = -1; |
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175 | |
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176 | roar_mm_free(self); |
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177 | |
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178 | return ret; |
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179 | } |
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180 | |
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181 | //ll |
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