1 | //rdtcs.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 roard 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 | * RoarAudio 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 "roard.h" |
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26 | |
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27 | #ifndef ROAR_WITHOUT_DCOMP_RDTCS |
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28 | |
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29 | int rdtcs_init (void) { |
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30 | return 0; |
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31 | } |
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32 | |
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33 | int rdtcs_free (void) { |
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34 | return 0; |
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35 | } |
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36 | |
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37 | int rdtcs_init_config (void) { |
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38 | memset(&g_rdtcs, 0, sizeof(g_rdtcs)); |
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39 | |
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40 | strncpy(g_rdtcs.rds.ps, RDTCS_RDS_PS_DEFAULT, RDTCS_RDS_PS_LEN); |
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41 | g_rdtcs.rds.ps[RDTCS_RDS_PS_LEN] = 0; |
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42 | |
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43 | g_rdtcs.rds.pty = RDTCS_RDS_PTY_DEFAULT; |
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44 | g_rdtcs.rds.pi = RDTCS_RDS_PI_DEFAULT; |
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45 | g_rdtcs.rds.flags = RDTCS_RDS_FLAG_NONE; |
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46 | |
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47 | return 0; |
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48 | } |
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49 | |
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50 | int rdtcs_rds_set_ps (char * ps) { |
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51 | int i; |
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52 | |
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53 | if ( ps == NULL ) |
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54 | return -1; |
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55 | |
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56 | if ( strlen(ps) > 8 ) |
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57 | return -1; |
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58 | |
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59 | // coppy string converting to upper case: |
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60 | for (i = 0; ps[i]; i++) { |
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61 | g_rdtcs.rds.ps[i] = toupper(ps[i]); |
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62 | } |
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63 | |
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64 | g_rdtcs.rds.ps[i] = 0; // terminating \0 |
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65 | |
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66 | return 0; |
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67 | } |
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68 | |
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69 | int rdtcs_rds_set_pty (char * pty) { |
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70 | if ( pty == NULL ) |
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71 | return -1; |
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72 | |
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73 | return -1; |
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74 | } |
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75 | |
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76 | int rdtcs_rds_set_flag (unsigned int flag, int reset) { |
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77 | |
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78 | g_rdtcs.rds.flags |= flag; |
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79 | |
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80 | if ( reset ) |
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81 | g_rdtcs.rds.flags -= flag; |
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82 | |
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83 | return 0; |
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84 | } |
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85 | |
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86 | |
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87 | int rdtcs_check_stream (int id) { |
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88 | return -1; |
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89 | } |
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90 | |
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91 | int rdtcs_send_stream (int id) { |
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92 | struct roar_stream * s; |
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93 | struct roar_stream_server * ss; |
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94 | |
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95 | if ( g_streams[id] == NULL ) |
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96 | return -1; |
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97 | |
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98 | ROAR_DBG("rdtcs_send_stream(id=%i) = ?", id); |
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99 | |
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100 | s = ROAR_STREAM(ss = g_streams[id]); |
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101 | |
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102 | switch (s->info.codec) { |
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103 | case ROAR_CODEC_RDS: |
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104 | return rdtcs_send_stream_rds(id, ss); |
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105 | break; |
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106 | default: |
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107 | streams_delete(id); |
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108 | return -1; |
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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 rdtcs_send_stream_rds (int id, struct roar_stream_server * ss) { |
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115 | struct roar_stream * s; |
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116 | |
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117 | s = ROAR_STREAM(ss); |
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118 | |
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119 | |
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120 | return rdtcs_send_stream_rds_group(id, ss); |
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121 | } |
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122 | |
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123 | int rdtcs_send_stream_rds_group (int id, struct roar_stream_server * ss) { |
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124 | char out[RDTCS_RDS_GROUP_LEN]; |
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125 | char * c; |
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126 | int block[4] = {RDTCS_RDS_BLOCK_A, RDTCS_RDS_BLOCK_B, RDTCS_RDS_BLOCK_C0, RDTCS_RDS_BLOCK_D}; |
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127 | uint16_t data[4]; |
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128 | uint16_t crc; |
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129 | register uint32_t s; |
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130 | int i, fill; |
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131 | |
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132 | // TODO: think about byte order! |
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133 | |
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134 | for (i = 0; i < 4; i++) data[i] = 0; |
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135 | |
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136 | data[0] = g_rdtcs.rds.pi; |
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137 | |
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138 | memset(out, 0, sizeof(out)); |
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139 | |
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140 | c = out; |
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141 | s = 0; |
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142 | fill = 0; |
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143 | for (i = 0; i < 4; i++) { |
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144 | // data is 16 bit long |
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145 | s |= data[i] << (fill & 0xFFFF); |
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146 | fill += 16; |
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147 | |
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148 | crc = rdtcs_rds_crc_calc(data[i], block[i]); |
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149 | |
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150 | // CRC is 10 bit long |
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151 | s |= crc << (fill & 0x03FF); |
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152 | fill += 10; |
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153 | |
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154 | // shift all complet bytes we allready have out |
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155 | while (fill >= 8) { |
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156 | *c = s & 0xFF; |
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157 | c++; |
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158 | s >>= 8; |
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159 | fill -= 8; |
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160 | } |
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161 | } |
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162 | |
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163 | return stream_vio_s_write(ss, out, RDTCS_RDS_GROUP_LEN) == RDTCS_RDS_GROUP_LEN ? 0 : -1; |
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164 | } |
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165 | |
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166 | uint16_t rdtcs_rds_crc_calc (uint16_t data, int block) { |
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167 | return 0xAAAA; |
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168 | } |
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169 | |
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170 | #endif |
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171 | |
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172 | //ll |
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