1 | //roardmx.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
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5 | * |
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6 | * This file is part of libroardsp 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 | * libroardsp 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 | */ |
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24 | |
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25 | #include "libroarlight.h" |
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26 | |
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27 | // base(ic) check |
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28 | #define BCHK(x) if ( (x) == NULL ) return -1 |
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29 | |
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30 | int roar_roardmx_message_new (struct roar_roardmx_message * mes) { |
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31 | BCHK(mes); |
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32 | |
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33 | memset(mes, 0, sizeof(struct roar_roardmx_message)); |
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34 | |
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35 | mes->version = ROAR_ROARDMX_VERSION; |
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36 | |
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37 | return 0; |
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38 | } |
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39 | |
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40 | // low level: |
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41 | //int roar_roardmx_message_set_flag(struct roar_roardmx_message * mes, unsigned char flag); |
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42 | //int roar_roardmx_message_set_len (struct roar_roardmx_message * mes, size_t type); |
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43 | //int roar_roardmx_message_get_data(struct roar_roardmx_message * mes, unsigned char ** data); |
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44 | |
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45 | // mdium level: |
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46 | int roar_roardmx_message_set_type(struct roar_roardmx_message * mes, unsigned char type) { |
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47 | BCHK(mes); |
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48 | |
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49 | if ( (type | ROAR_ROARDMX_MASK_TYPE) - ROAR_ROARDMX_MASK_TYPE ) |
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50 | return -1; |
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51 | |
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52 | mes->type = type; |
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53 | |
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54 | return 0; |
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55 | } |
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56 | |
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57 | int roar_roardmx_message_get_flag(struct roar_roardmx_message * mes, unsigned char * flag) { |
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58 | BCHK(mes); |
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59 | |
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60 | *flag = mes->flags; |
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61 | |
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62 | return 0; |
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63 | } |
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64 | |
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65 | int roar_roardmx_message_get_type(struct roar_roardmx_message * mes, unsigned char * type) { |
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66 | BCHK(mes); |
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67 | |
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68 | *type = mes->type; |
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69 | |
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70 | return 0; |
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71 | } |
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72 | |
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73 | int roar_roardmx_message_get_len (struct roar_roardmx_message * mes, size_t * length) { |
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74 | BCHK(mes); |
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75 | |
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76 | *length = mes->length; |
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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 | |
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82 | // IO: |
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83 | int roar_roardmx_message_send(struct roar_roardmx_message * mes, struct roar_vio_calls * vio) { |
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84 | BCHK(mes); |
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85 | BCHK(vio); |
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86 | |
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87 | if ( mes->length > ROAR_ROARDMX_DATA_LENGTH ) // this is very fatal! |
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88 | return -1; |
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89 | |
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90 | mes->data[0] = mes->version; |
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91 | mes->data[1] = (mes->flags & ROAR_ROARDMX_MASK_FLAGS) | |
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92 | (mes->type & ROAR_ROARDMX_MASK_TYPE ) ; |
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93 | |
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94 | mes->data[2] = mes->length; |
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95 | |
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96 | return roar_vio_write(vio, mes->data, mes->length + 3) == (mes->length + 3) ? 0 : -1; |
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97 | } |
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98 | |
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99 | int roar_roardmx_message_recv(struct roar_roardmx_message * mes, struct roar_vio_calls * vio) { |
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100 | BCHK(mes); |
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101 | BCHK(vio); |
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102 | |
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103 | if ( roar_roardmx_message_new(mes) == -1 ) |
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104 | return -1; |
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105 | |
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106 | if ( roar_vio_read(vio, mes->data, 3) != 3 ) |
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107 | return -1; |
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108 | |
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109 | mes->version = mes->data[0]; |
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110 | |
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111 | if ( mes->version != 0 ) |
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112 | return -1; |
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113 | |
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114 | mes->flags = mes->data[1] & ROAR_ROARDMX_MASK_FLAGS; |
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115 | mes->type = mes->data[1] & ROAR_ROARDMX_MASK_TYPE; |
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116 | |
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117 | mes->length = mes->data[2]; |
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118 | |
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119 | if ( roar_vio_read(vio, &(mes->data[3]), mes->length) != mes->length ) |
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120 | return -1; |
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121 | |
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122 | return 0; |
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123 | } |
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124 | |
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125 | // Data/high level: |
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126 | // * SSET: |
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127 | int roar_roardmx_message_new_sset (struct roar_roardmx_message * mes) { |
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128 | if ( roar_roardmx_message_new(mes) == -1 ) |
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129 | return -1; |
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130 | |
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131 | mes->type = ROAR_ROARDMX_TYPE_SSET; |
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132 | |
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133 | return 0; |
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134 | } |
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135 | |
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136 | int roar_roardmx_message_add_chanval(struct roar_roardmx_message * mes, uint16_t channel, unsigned char val) { |
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137 | register uint16_t * chan; |
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138 | |
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139 | BCHK(mes); |
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140 | |
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141 | if ( (mes->length + 3) > ROAR_ROARDMX_DATA_LENGTH ) // message would be to long |
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142 | return -1; |
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143 | |
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144 | chan = (uint16_t *) &(mes->data[mes->length + 3]); |
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145 | |
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146 | *chan = ROAR_HOST2NET16(channel); |
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147 | |
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148 | mes->data[mes->length + 2 + 3] = val; |
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149 | |
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150 | mes->length += 3; |
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151 | |
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152 | return 0; |
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153 | } |
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154 | |
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155 | int roar_roardmx_message_get_chanval(struct roar_roardmx_message * mes, uint16_t * channel, unsigned char * val, int index) { |
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156 | register uint16_t * chan; |
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157 | |
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158 | BCHK(mes); |
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159 | |
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160 | if ( index < 0 ) |
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161 | return -1; |
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162 | |
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163 | if ( mes->version != 0 ) |
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164 | return -1; |
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165 | |
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166 | switch (mes->type) { |
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167 | case ROAR_ROARDMX_TYPE_SSET: |
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168 | case ROAR_ROARDMX_TYPE_INC8S: |
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169 | if ( index >= (ROAR_ROARDMX_DATA_LENGTH/3) ) |
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170 | return -1; |
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171 | |
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172 | *val = mes->data[3 * index + 2 + 3]; |
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173 | chan = (uint16_t *) &(mes->data[3 + 3 * index]); |
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174 | *channel = ROAR_NET2HOST16(*chan); |
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175 | return 0; |
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176 | break; |
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177 | } |
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178 | |
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179 | return -1; |
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180 | } |
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181 | |
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182 | int roar_roardmx_message_numchannels(struct roar_roardmx_message * mes) { |
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183 | BCHK(mes); |
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184 | |
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185 | if ( mes->version != 0 ) |
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186 | return -1; |
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187 | |
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188 | switch (mes->type) { |
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189 | case ROAR_ROARDMX_TYPE_SSET: |
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190 | case ROAR_ROARDMX_TYPE_INC8S: |
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191 | return mes->length / 3; |
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192 | break; |
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193 | case ROAR_ROARDMX_TYPE_IPO1: |
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194 | return mes->length / 6; |
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195 | break; |
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196 | case ROAR_ROARDMX_TYPE_IPO4: |
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197 | return mes->length / 12; |
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198 | break; |
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199 | } |
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200 | |
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201 | return -1; |
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202 | } |
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203 | |
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204 | //ll |
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