1 | //caps.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2012 |
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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, 51 Franklin Street, Fifth Floor, |
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22 | * Boston, MA 02110-1301, USA. |
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23 | * |
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24 | * NOTE for everyone want's to change something and send patches: |
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25 | * read README and HACKING! There a addition information on |
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26 | * the license of this document you need to read before you send |
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27 | * any patches. |
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28 | * |
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29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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30 | * or libpulse*: |
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31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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32 | * and are therefore GPL. Because of this it may be illigal to use |
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33 | * them with any software that uses libesd, libartsc or libpulse*. |
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34 | */ |
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35 | |
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36 | #include "libroar.h" |
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37 | |
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38 | const struct roar_stds * libroar_libstds(void) { |
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39 | static const uint32_t std[] = { |
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40 | ROAR_STD_MAKE(ROAR_STDV_ROARAUDIO, 0, 0) // ra-msg-v0 |
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41 | }; |
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42 | static const struct roar_stds stds = {.stds_len = sizeof(std)/sizeof(*std), .stds = (uint32_t*)std}; |
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43 | return &stds; |
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44 | } |
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45 | |
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46 | int roar_caps_to_msg(struct roar_message * mes, struct roar_caps * caps, void ** data) { |
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47 | char * datap; |
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48 | size_t needlen = 4; |
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49 | |
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50 | if ( mes == NULL || caps == NULL ) |
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51 | return -1; |
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52 | |
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53 | needlen += caps->len; |
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54 | |
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55 | if ( needlen > sizeof(mes->data) ) { |
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56 | if ( data == NULL ) |
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57 | return -1; |
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58 | |
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59 | if ( (*data = roar_mm_malloc(needlen)) == NULL ) |
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60 | return -1; |
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61 | |
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62 | datap = *data; |
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63 | } else { |
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64 | datap = mes->data; |
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65 | } |
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66 | |
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67 | datap[0] = caps->version; |
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68 | datap[1] = caps->type; |
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69 | datap[2] = (caps->flags & 0xFF00) >> 8; |
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70 | datap[3] = caps->flags & 0xFF; |
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71 | |
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72 | if ( caps->len != 0 ) { |
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73 | memcpy(&(datap[4]), caps->data, caps->len); |
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74 | } |
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75 | |
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76 | mes->datalen = needlen; |
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77 | |
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78 | return 0; |
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79 | } |
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80 | |
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81 | int roar_caps_from_msg(struct roar_caps * caps, struct roar_message * mes, void * data) { |
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82 | char * datap; |
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83 | |
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84 | if ( mes == NULL || caps == NULL ) |
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85 | return -1; |
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86 | |
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87 | if ( data != NULL ) { |
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88 | datap = data; |
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89 | } else { |
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90 | datap = mes->data; |
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91 | } |
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92 | |
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93 | // versin check. |
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94 | if ( datap[0] != 0 || mes->datalen < 4 ) |
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95 | return -1; |
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96 | |
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97 | memset(caps, 0, sizeof(struct roar_caps)); |
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98 | |
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99 | caps->version = datap[0]; |
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100 | caps->type = datap[1]; |
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101 | caps->flags = (datap[2] << 8) | datap[3]; |
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102 | |
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103 | if ( mes->datalen == 4 ) { |
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104 | caps->data = NULL; |
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105 | caps->len = 0; |
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106 | } else { |
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107 | caps->data = &(datap[4]); |
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108 | caps->len = mes->datalen - 4; |
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109 | } |
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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_caps_stds(struct roar_connection * con, struct roar_stds ** out, struct roar_stds * in, int flags) { |
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115 | struct roar_message mes; |
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116 | struct roar_caps caps; |
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117 | void * data = NULL; |
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118 | char * data_char; |
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119 | size_t i; |
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120 | |
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121 | ROAR_DBG("roar_caps_stds(con=%p, out=%p, in=%p, flags=0x%.4x) = ?", con, out, in, flags); |
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122 | |
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123 | if ( flags == -1 ) |
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124 | flags = 0; |
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125 | |
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126 | if ( con == NULL ) { |
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127 | roar_err_set(ROAR_ERROR_FAULT); |
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128 | return -1; |
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129 | } |
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130 | |
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131 | if ( out != NULL ) |
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132 | flags |= ROAR_CF_REQUEST; |
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133 | |
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134 | if ( (flags & ROAR_CF_REQUEST) && out == NULL ) |
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135 | return -1; |
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136 | |
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137 | if ( in != NULL ) |
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138 | if ( in->stds_len == 0 ) |
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139 | in = NULL; |
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140 | |
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141 | memset(&caps, 0, sizeof(caps)); |
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142 | |
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143 | caps.version = 0; |
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144 | caps.type = ROAR_CT_STANDARDS; |
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145 | caps.flags = flags; |
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146 | |
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147 | memset(&mes, 0, sizeof(mes)); |
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148 | |
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149 | if ( in != NULL ) { |
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150 | // we use a hack here to avoid double alloc: |
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151 | // first pass the data in native byte order. |
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152 | // after we got a buffer swap in-buffer. |
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153 | caps.data = in->stds; |
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154 | caps.len = in->stds_len * 4; |
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155 | } |
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156 | |
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157 | if ( roar_caps_to_msg(&mes, &caps, &data) == -1 ) |
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158 | return -1; |
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159 | |
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160 | if ( in != NULL ) { |
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161 | if ( data == NULL ) { |
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162 | for (i = 0; i < in->stds_len; i++) { |
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163 | ((uint32_t*)mes.data)[i] = ROAR_HOST2NET32(((uint32_t*)mes.data)[i]); |
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164 | } |
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165 | } else { |
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166 | for (i = 0; i < in->stds_len; i++) { |
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167 | ((uint32_t*)data)[i] = ROAR_HOST2NET32(((uint32_t*)data)[i]); |
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168 | } |
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169 | } |
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170 | } |
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171 | |
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172 | mes.cmd = ROAR_CMD_CAPS; |
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173 | |
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174 | data_char = data; |
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175 | if ( roar_req(con, &mes, &data_char) == -1 ) |
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176 | return -1; |
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177 | data = data_char; |
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178 | |
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179 | if ( mes.cmd != ROAR_CMD_OK ) { |
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180 | if ( data != NULL ) |
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181 | roar_mm_free(data); |
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182 | return -1; |
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183 | } |
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184 | |
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185 | if ( roar_caps_from_msg(&caps, &mes, data) == -1 ) { |
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186 | if ( data != NULL ) |
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187 | roar_mm_free(data); |
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188 | return -1; |
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189 | } |
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190 | |
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191 | // check if response matches the request: |
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192 | if ( caps.version != 0 || caps.type != ROAR_CT_STANDARDS || (caps.len & 0x3) != 0 ) { |
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193 | if ( data != NULL ) |
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194 | roar_mm_free(data); |
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195 | return -1; |
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196 | } |
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197 | |
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198 | if ( out != NULL ) { |
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199 | *out = roar_stds_new(caps.len/4); |
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200 | if ( *out == NULL ) { |
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201 | if ( data != NULL ) |
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202 | roar_mm_free(data); |
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203 | return -1; |
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204 | } |
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205 | |
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206 | ROAR_DBG("roar_caps_stds(con=%p, out=%p, in=%p, flags=0x%.4x): (*out)->stds_len=%llu", con, out, in, flags, (long long unsigned int)(*out)->stds_len); |
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207 | |
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208 | for (i = 0; i < (*out)->stds_len; i++) { |
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209 | (*out)->stds[i] = ROAR_NET2HOST32(((uint32_t*)caps.data)[i]); |
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210 | ROAR_DBG("roar_caps_stds(con=%p, out=%p, in=%p, flags=0x%.4x): (*out)->stds[%llu] = 0x%.8x", con, out, in, flags, (long long unsigned int)i, (*out)->stds[i]); |
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211 | } |
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212 | } |
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213 | |
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214 | if ( data != NULL ) |
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215 | roar_mm_free(data); |
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216 | |
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217 | return 0; |
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218 | } |
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219 | |
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220 | struct roar_stds * roar_stds_new(size_t len) { |
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221 | struct roar_stds * ret; |
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222 | |
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223 | if ( len == 0 ) { |
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224 | roar_err_set(ROAR_ERROR_INVAL); |
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225 | return NULL; |
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226 | } |
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227 | |
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228 | ret = roar_mm_malloc(sizeof(struct roar_stds)); |
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229 | |
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230 | if ( ret == NULL ) |
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231 | return NULL; |
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232 | |
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233 | memset(ret, 0, sizeof(struct roar_stds)); |
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234 | |
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235 | ret->stds_len = len; |
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236 | ret->stds = roar_mm_malloc(len*sizeof(uint32_t)); |
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237 | |
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238 | if ( ret->stds == NULL ) { |
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239 | roar_mm_free(ret); |
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240 | return NULL; |
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241 | } |
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242 | |
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243 | memset(ret->stds, 0, len*sizeof(uint32_t)); |
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244 | |
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245 | return ret; |
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246 | } |
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247 | |
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248 | int roar_stds_free(struct roar_stds * stds) { |
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249 | if ( stds == NULL ) { |
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250 | roar_err_set(ROAR_ERROR_FAULT); |
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251 | return -1; |
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252 | } |
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253 | |
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254 | if ( stds->stds != NULL ) |
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255 | roar_mm_free(stds->stds); |
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256 | |
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257 | roar_mm_free(stds); |
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258 | |
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259 | return 0; |
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260 | } |
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261 | |
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262 | |
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263 | static struct { |
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264 | const int vendor; |
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265 | const char * name; |
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266 | } _libroar_std_vendors[] = { |
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267 | {ROAR_STDV_ROARAUDIO, "RoarAudio"}, |
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268 | {ROAR_STDV_PROTO, "Protocols"}, |
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269 | {ROAR_STDV_RFC, "RFC"}, |
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270 | {-1, NULL} |
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271 | }; |
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272 | |
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273 | int roar_stds_str2vendor(const char * vendor) { |
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274 | int i; |
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275 | |
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276 | if ( vendor == NULL ) { |
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277 | roar_err_set(ROAR_ERROR_FAULT); |
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278 | return -1; |
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279 | } |
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280 | |
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281 | for (i = 0; _libroar_std_vendors[i].name != NULL; i++) |
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282 | if ( !strcasecmp(_libroar_std_vendors[i].name, vendor) ) |
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283 | return _libroar_std_vendors[i].vendor; |
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284 | |
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285 | roar_err_set(ROAR_ERROR_NOENT); |
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286 | return -1; |
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287 | } |
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288 | |
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289 | const char * roar_stds_vendor2str(const int vendor) { |
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290 | int i; |
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291 | |
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292 | for (i = 0; _libroar_std_vendors[i].name != NULL; i++) |
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293 | if ( _libroar_std_vendors[i].vendor == vendor ) |
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294 | return _libroar_std_vendors[i].name; |
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295 | |
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296 | roar_err_set(ROAR_ERROR_NOENT); |
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297 | return NULL; |
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298 | } |
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299 | |
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300 | |
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301 | //ll |
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