1 | //slfi.h: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2015 |
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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, 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 | */ |
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25 | |
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26 | #include "libroarlight.h" |
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27 | |
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28 | static inline const struct roar_slfi_filter * __find_impl_registered(const char * name, struct roar_dl_lhandle ** lhandle) { |
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29 | const void * impl; |
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30 | size_t impl_size; |
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31 | int options; |
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32 | ssize_t i; |
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33 | |
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34 | for (i = 0; ; i++) { |
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35 | if ( roar_dl_query_fn(lhandle, ROAR_DL_FN_FILTER, ROAR_DL_FILTER_SUBTYPE_SLFI, &impl, &impl_size, ROAR_DL_FILTER_VERSION_SLFI, &options, i) == -1 ) { |
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36 | return NULL; |
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37 | } |
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38 | |
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39 | if ( impl_size != ROAR_DL_FILTER_SIZE_SLFI ) { |
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40 | ROAR_WARN("__find_impl_registered(*): Object %p has wrong size of %u. Strange.", impl, (unsigned int)impl_size); |
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41 | continue; |
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42 | } |
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43 | |
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44 | if ( ((const struct roar_slfi_filter *)impl)->name == NULL ) { |
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45 | ROAR_WARN("__find_impl_registered(*): Object %p has no name. Strange.", impl); |
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46 | continue; |
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47 | } |
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48 | |
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49 | if ( !!strcmp(((const struct roar_slfi_filter *)impl)->name, name) ) |
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50 | continue; |
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51 | |
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52 | return impl; |
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53 | } |
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54 | } |
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55 | |
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56 | static struct roar_dl_lhandle * __find_impl_autoload(const char * name) { |
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57 | struct roar_dl_lhandle * lhandle = NULL; |
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58 | struct roar_dl_librarypara * para = NULL; |
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59 | char buf[80]; |
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60 | int err; |
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61 | |
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62 | para = roar_dl_para_new(NULL, NULL, LIBROAR_DL_APPNAME, LIBROAR_DL_ABIVERSION); |
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63 | if ( para == NULL ) |
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64 | return NULL; |
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65 | |
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66 | snprintf(buf, sizeof(buf), "filter-slfi-%s", name); |
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67 | lhandle = roar_dl_open(buf, ROAR_DL_FLAG_PLUGIN, 1, para); |
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68 | |
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69 | err = roar_error; |
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70 | roar_dl_para_unref(para); |
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71 | roar_error = err; |
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72 | |
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73 | return lhandle; |
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74 | } |
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75 | |
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76 | static const struct roar_slfi_filter * __find_impl(const char * name, int autoload, struct roar_dl_lhandle ** lhandle) { |
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77 | const struct roar_slfi_filter * impl; |
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78 | struct roar_dl_lhandle * loaded_lhandle = NULL; |
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79 | int err; |
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80 | |
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81 | impl = __find_impl_registered(name, lhandle); |
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82 | if ( impl != NULL ) { |
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83 | roar_dl_ref(*lhandle); |
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84 | return impl; |
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85 | } |
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86 | |
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87 | if ( autoload ) { |
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88 | loaded_lhandle = __find_impl_autoload(name); |
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89 | if ( loaded_lhandle == NULL ) |
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90 | return NULL; |
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91 | |
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92 | impl = __find_impl_registered(name, lhandle); |
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93 | if ( impl == NULL ) { |
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94 | err = roar_error; |
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95 | roar_dl_unref(loaded_lhandle); |
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96 | roar_err_set(err); |
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97 | return NULL; |
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98 | } else if ( *lhandle != loaded_lhandle ) { |
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99 | ROAR_WARN("__find_impl(name='%s', autoload=%i, lhandle=%p): Loaded handle and found handle do not match. Strange.", name, autoload, lhandle); |
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100 | roar_dl_unref(loaded_lhandle); |
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101 | roar_err_set(ROAR_ERROR_BADFH); |
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102 | return NULL; |
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103 | } else { |
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104 | *lhandle = loaded_lhandle; |
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105 | return impl; |
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106 | } |
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107 | } |
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108 | |
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109 | roar_err_set(ROAR_ERROR_NOENT); |
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110 | return NULL; |
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111 | } |
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112 | |
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113 | struct roar_slfi_inst * roar_slfi_new(const char * name, int autoload, const struct roar_keyval * para, ssize_t paralen) { |
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114 | const struct roar_slfi_filter * impl; |
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115 | struct roar_dl_lhandle * lhandle = NULL; |
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116 | struct roar_slfi_inst * inst; |
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117 | int err; |
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118 | |
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119 | impl = __find_impl(name, autoload, &lhandle); |
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120 | if ( impl == NULL ) |
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121 | return NULL; |
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122 | |
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123 | inst = roar_mm_malloc(sizeof(*inst)); |
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124 | if ( inst == NULL ) |
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125 | return NULL; |
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126 | |
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127 | memset(inst, 0, sizeof(*inst)); |
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128 | |
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129 | inst->refc = 1; |
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130 | inst->impl = impl; |
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131 | inst->flags = impl->flags; |
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132 | inst->userdata = NULL; |
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133 | inst->lhandle = lhandle; |
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134 | |
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135 | if ( inst->impl->init != NULL ) { |
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136 | if ( lhandle != NULL ) |
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137 | roar_dl_context_restore(lhandle); |
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138 | if ( inst->impl->init(inst, para, paralen) != 0 ) { |
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139 | err = roar_error; |
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140 | if ( lhandle != NULL ) |
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141 | roar_dl_context_store(lhandle); |
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142 | if ( inst->userdata != NULL ) |
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143 | roar_mm_free(inst->userdata); |
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144 | roar_mm_free(inst); |
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145 | if ( lhandle != NULL ) |
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146 | roar_dl_unref(lhandle); |
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147 | roar_err_set(err); |
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148 | return NULL; |
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149 | } |
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150 | if ( lhandle != NULL ) |
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151 | roar_dl_context_store(lhandle); |
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152 | } |
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153 | |
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154 | return inst; |
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155 | } |
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156 | |
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157 | int roar_slfi_ref(struct roar_slfi_inst * inst) { |
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158 | if ( inst == NULL || inst->impl == NULL ) { |
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159 | roar_err_set(ROAR_ERROR_FAULT); |
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160 | return -1; |
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161 | } |
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162 | |
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163 | inst->refc++; |
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164 | |
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165 | return 0; |
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166 | } |
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167 | |
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168 | int roar_slfi_unref(struct roar_slfi_inst * inst) { |
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169 | if ( inst == NULL || inst->impl == NULL ) { |
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170 | roar_err_set(ROAR_ERROR_FAULT); |
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171 | return -1; |
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172 | } |
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173 | |
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174 | inst->refc--; |
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175 | |
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176 | if ( inst->refc ) |
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177 | return 0; |
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178 | |
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179 | if ( inst->impl->uninit != NULL ) { |
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180 | if ( inst->lhandle != NULL ) |
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181 | roar_dl_context_restore(inst->lhandle); |
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182 | inst->impl->uninit(inst); |
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183 | if ( inst->lhandle != NULL ) |
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184 | roar_dl_context_store(inst->lhandle); |
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185 | } |
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186 | |
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187 | if ( inst->userdata != NULL ) |
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188 | roar_mm_free(inst->userdata); |
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189 | |
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190 | if ( inst->lhandle != NULL ) |
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191 | roar_dl_unref(inst->lhandle); |
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192 | |
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193 | roar_mm_free(inst); |
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194 | |
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195 | return 0; |
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196 | } |
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197 | |
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198 | int roar_slfi_update(struct roar_slfi_inst * inst, uint8_t * universe, ssize_t size_of_universe, int32_t usecspassed, const uint8_t * event, size_t eventlen) { |
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199 | int ret; |
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200 | |
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201 | if ( inst == NULL || inst->impl == NULL ) { |
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202 | roar_err_set(ROAR_ERROR_FAULT); |
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203 | return -1; |
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204 | } |
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205 | |
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206 | if ( inst->impl->update == NULL ) { |
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207 | roar_err_set(ROAR_ERROR_NOSYS); |
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208 | return -1; |
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209 | } |
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210 | |
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211 | if ( inst->lhandle != NULL ) |
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212 | roar_dl_context_restore(inst->lhandle); |
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213 | ret = inst->impl->update(inst, universe, size_of_universe, usecspassed, event, eventlen); |
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214 | if ( inst->lhandle != NULL ) |
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215 | roar_dl_context_store(inst->lhandle); |
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216 | |
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217 | return ret; |
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218 | } |
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219 | |
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220 | int roar_slfi_ctl(struct roar_slfi_inst * inst, enum roar_slfi_command command, void * argp) { |
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221 | int ret; |
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222 | |
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223 | if ( inst == NULL || inst->impl == NULL ) { |
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224 | roar_err_set(ROAR_ERROR_FAULT); |
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225 | return -1; |
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226 | } |
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227 | |
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228 | if ( inst->impl->ctl == NULL ) { |
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229 | roar_err_set(ROAR_ERROR_NOSYS); |
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230 | return -1; |
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231 | } |
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232 | |
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233 | if ( inst->lhandle != NULL ) |
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234 | roar_dl_context_restore(inst->lhandle); |
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235 | ret = inst->impl->ctl(inst, command, argp); |
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236 | if ( inst->lhandle != NULL ) |
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237 | roar_dl_context_store(inst->lhandle); |
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238 | |
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239 | return ret; |
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240 | } |
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241 | |
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242 | int roar_slfi_event_add(struct roar_slfi_inst * inst, uint8_t event) { |
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243 | if ( inst == NULL ) { |
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244 | roar_err_set(ROAR_ERROR_FAULT); |
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245 | return -1; |
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246 | } |
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247 | |
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248 | if ( inst->cb_event_add == NULL ) { |
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249 | roar_err_set(ROAR_ERROR_NOSYS); |
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250 | return -1; |
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251 | } |
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252 | |
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253 | return inst->cb_event_add(inst, inst->cb_event_add_userdata, event); |
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254 | } |
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255 | |
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256 | int roar_slfi_cb_set_event_add(struct roar_slfi_inst * inst, int (*cb)(struct roar_slfi_inst * inst, void * userdata, uint8_t event), void * userdata) { |
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257 | if ( inst == NULL ) { |
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258 | roar_err_set(ROAR_ERROR_FAULT); |
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259 | return -1; |
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260 | } |
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261 | |
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262 | inst->cb_event_add = cb; |
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263 | inst->cb_event_add_userdata = userdata; |
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264 | return 0; |
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265 | } |
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266 | |
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267 | //ll |
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