1 | //ltm.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, 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 | static int roar_ltm_numbits(int f) { |
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39 | int found = 0; |
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40 | |
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41 | while (f) { |
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42 | if ( f & 0x1 ) |
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43 | found++; |
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44 | |
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45 | f >>= 1; |
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46 | } |
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47 | |
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48 | return found; |
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49 | } |
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50 | |
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51 | static int roar_ltm_pack_req(int mt, int window, |
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52 | int * streams, size_t slen, |
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53 | struct roar_message * mes, char ** buf, |
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54 | int regtype) { |
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55 | uint16_t * data; |
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56 | size_t i; |
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57 | |
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58 | if ( mt == 0 || streams == NULL || slen == 0 || mes == NULL || buf == NULL ) { |
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59 | roar_errno = ROAR_ERROR_INVAL; |
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60 | return -1; |
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61 | } |
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62 | |
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63 | memset(mes, 0, sizeof(struct roar_message)); |
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64 | |
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65 | switch (regtype) { |
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66 | case ROAR_LTM_SST_REGISTER: |
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67 | case ROAR_LTM_SST_UNREGISTER: |
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68 | mes->cmd = ROAR_CMD_SET_STREAM_PARA; |
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69 | break; |
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70 | case ROAR_LTM_SST_GET_RAW: |
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71 | mes->cmd = ROAR_CMD_GET_STREAM_PARA; |
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72 | break; |
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73 | default: |
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74 | roar_errno = ROAR_ERROR_NOTSUP; |
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75 | return -1; |
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76 | break; |
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77 | } |
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78 | |
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79 | if ( slen == 1 ) { |
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80 | mes->stream = *streams; |
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81 | mes->datalen = 6 * 2; |
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82 | } else { |
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83 | mes->stream = -1; |
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84 | mes->datalen = (6 + slen) * 2; |
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85 | } |
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86 | |
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87 | if ( mes->datalen > LIBROAR_BUFFER_MSGDATA ) { |
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88 | roar_errno = ROAR_ERROR_NOTSUP; |
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89 | return -1; |
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90 | } |
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91 | |
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92 | *buf = NULL; |
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93 | |
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94 | data = (uint16_t*)mes->data; |
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95 | |
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96 | data[0] = 0; |
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97 | data[1] = ROAR_STREAM_PARA_LTM; |
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98 | data[2] = regtype; |
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99 | data[3] = window; |
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100 | data[4] = 0; |
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101 | data[5] = mt; |
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102 | |
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103 | for (i = 0; i < slen; i++) { |
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104 | data[6+i] = streams[i]; |
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105 | } |
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106 | |
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107 | for (i = 0; i < (mes->datalen/2); i++) { |
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108 | data[i] = ROAR_HOST2NET16(data[i]); |
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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 | static int roar_ltm_regunreg(struct roar_connection * con, int mt, int window, int * streams, size_t slen, int type) { |
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115 | struct roar_message mes; |
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116 | char * buf = NULL; |
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117 | int ret; |
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118 | |
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119 | if ( roar_ltm_pack_req(mt, window, streams, slen, &mes, &buf, type) == -1 ) |
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120 | return -1; |
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121 | |
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122 | ret = roar_req(con, &mes, &buf); |
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123 | |
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124 | if ( buf != NULL ) |
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125 | free(buf); |
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126 | |
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127 | if ( ret != -1 ) { |
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128 | if ( mes.cmd != ROAR_CMD_OK ) |
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129 | ret = -1; |
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130 | } |
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131 | |
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132 | return ret; |
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133 | } |
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134 | |
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135 | int roar_ltm_register(struct roar_connection * con, int mt, int window, int * streams, size_t slen) { |
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136 | return roar_ltm_regunreg(con, mt, window, streams, slen, ROAR_LTM_SST_REGISTER); |
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137 | } |
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138 | int roar_ltm_unregister(struct roar_connection * con, int mt, int window, int * streams, size_t slen) { |
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139 | return roar_ltm_regunreg(con, mt, window, streams, slen, ROAR_LTM_SST_UNREGISTER); |
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140 | } |
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141 | |
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142 | ssize_t roar_ltm_get_raw(struct roar_connection * con, |
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143 | int mt, int window, |
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144 | int * streams, size_t slen, |
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145 | void * buf, size_t * buflen, int64_t ** array) { |
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146 | int bits = roar_ltm_numbits(mt); |
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147 | int64_t * buffer = buf; |
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148 | size_t i; |
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149 | |
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150 | if ( buflen == NULL ) { |
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151 | roar_errno = ROAR_ERROR_INVAL; |
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152 | return -1; |
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153 | } |
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154 | |
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155 | if ( slen == 0 ) { |
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156 | *buflen = 0; |
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157 | return bits; |
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158 | } |
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159 | |
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160 | if ( con == NULL || streams == NULL || buf == NULL || array == NULL ) { |
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161 | roar_errno = ROAR_ERROR_INVAL; |
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162 | return -1; |
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163 | } |
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164 | |
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165 | if ( *buflen < (bits * slen) ) { |
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166 | roar_errno = ROAR_ERROR_INVAL; |
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167 | return -1; |
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168 | } |
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169 | |
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170 | for (i = 0; i < slen; i++) { |
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171 | array[i] = &(buffer[bits*i]); |
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172 | } |
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173 | |
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174 | roar_errno = ROAR_ERROR_NOSYS; |
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175 | return -1; |
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176 | } |
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177 | |
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178 | int64_t roar_ltm_extract(int64_t * buf, size_t len, int mt, int req) { |
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179 | int have, need; |
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180 | |
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181 | roar_err_clear(); |
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182 | |
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183 | have = roar_ltm_numbits(req); |
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184 | |
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185 | need = roar_ltm_numbits(mt); |
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186 | |
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187 | if ( have != 1 || (mt & req) != req || len != (size_t)need || buf == NULL ) { |
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188 | roar_errno = ROAR_ERROR_INVAL; |
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189 | return 0; |
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190 | } |
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191 | |
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192 | while (req && (req & 0x1) == 0) { |
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193 | if ( mt & 0x1 ) |
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194 | buf++; |
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195 | |
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196 | mt <<= 1; |
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197 | req <<= 1; |
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198 | } |
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199 | |
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200 | return *buf; |
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201 | } |
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202 | |
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203 | int64_t roar_ltm_extract1(int64_t * buf, size_t len, int mt, int req) { |
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204 | roar_err_clear(); |
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205 | |
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206 | if ( buf == NULL || len != 1 || mt != req ) { |
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207 | roar_errno = ROAR_ERROR_INVAL; |
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208 | return 0; |
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209 | } |
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210 | |
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211 | return *buf; |
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212 | } |
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213 | |
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214 | //ll |
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