1 | //filter-slfi-alternative.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2012-2014 |
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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, 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 <roaraudio.h> |
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27 | #include <libroarlight/libroarlight.h> |
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28 | |
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29 | #define MAX_FILTER 32 |
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30 | |
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31 | struct slfi_alternative { |
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32 | struct roar_slfi_inst * filter[MAX_FILTER]; |
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33 | size_t filter_len; |
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34 | size_t current; |
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35 | ssize_t channel; |
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36 | uint8_t event; |
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37 | }; |
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38 | |
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39 | static int __cb_event_add(struct roar_slfi_inst * inst, void * userdata, uint8_t event) { |
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40 | (void)inst; |
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41 | return roar_slfi_event_add(userdata, event); |
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42 | } |
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43 | |
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44 | static int __init(struct roar_slfi_inst * inst, const struct roar_keyval * para, ssize_t paralen) { |
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45 | struct slfi_alternative * self = roar_mm_malloc(sizeof(struct slfi_alternative)); |
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46 | const struct roar_keyval * kv; |
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47 | ssize_t i; |
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48 | |
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49 | if ( self == NULL ) |
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50 | return -1; |
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51 | |
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52 | self->filter_len = 0; |
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53 | self->current = 0; |
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54 | self->channel = -1; |
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55 | self->event = ROAR_ROARDMX_EVENT_STEP; |
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56 | inst->userdata = self; |
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57 | |
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58 | for (i = 0; i < paralen; i++) { |
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59 | kv = &(para[i]); |
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60 | if ( kv->key == NULL || kv->value == NULL ) |
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61 | continue; |
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62 | if ( !strcmp(kv->key, "channel") ) { |
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63 | self->channel = atoi(kv->value); |
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64 | if ( self->channel < 0 ) |
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65 | self->channel = 0; |
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66 | } else if ( !strcmp(kv->key, "event") ) { |
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67 | self->event = roar_roardmx_str2event(kv->value); |
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68 | } else { |
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69 | ROAR_WARN("__init(*): Unknown parameter: %s", kv->key); |
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70 | } |
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71 | } |
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72 | |
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73 | return 0; |
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74 | } |
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75 | |
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76 | static int __uninit(struct roar_slfi_inst * inst) { |
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77 | struct slfi_alternative * self = inst->userdata; |
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78 | size_t i; |
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79 | |
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80 | for (i = 0; i < self->filter_len; i++) { |
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81 | roar_slfi_unref(self->filter[i]); |
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82 | } |
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83 | |
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84 | return 0; |
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85 | } |
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86 | |
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87 | static int __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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88 | struct slfi_alternative * self = inst->userdata; |
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89 | size_t i; |
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90 | |
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91 | // Don't do anything if we have no childs: |
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92 | if ( self->filter_len == 0 ) |
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93 | return 0; |
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94 | |
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95 | if ( self->channel == (ssize_t)-1 ) { |
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96 | for (i = 0; i < eventlen; i++) { |
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97 | if ( event[i] == self->event ) { |
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98 | self->current++; |
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99 | if ( self->current == self->filter_len ) |
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100 | self->current = 0; |
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101 | break; |
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102 | } |
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103 | } |
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104 | } else if ( size_of_universe > self->channel ) { |
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105 | self->current = universe[self->channel] / self->filter_len; |
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106 | if ( self->current >= self->filter_len ) |
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107 | self->current = self->filter_len - 1; |
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108 | } else { |
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109 | ROAR_WARN("__update(*): Universe too small for filter (source channel=%lu).", (unsigned long int)self->channel); |
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110 | roar_err_set(ROAR_ERROR_NOENT); |
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111 | return -1; |
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112 | } |
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113 | |
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114 | return roar_slfi_update(self->filter[self->current], universe, size_of_universe, usecspassed, event, eventlen); |
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115 | } |
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116 | |
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117 | static int __ctl(struct roar_slfi_inst * inst, enum roar_slfi_command command, void * argp) { |
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118 | struct slfi_alternative * self = inst->userdata; |
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119 | |
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120 | switch (command) { |
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121 | case ROAR_SLFI_CMD_PUSH: |
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122 | if ( self->filter_len == MAX_FILTER ) { |
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123 | roar_err_set(ROAR_ERROR_NOSPC); |
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124 | return -1; |
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125 | } |
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126 | if ( roar_slfi_ref(argp) == -1 ) |
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127 | return -1; |
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128 | roar_slfi_cb_set_event_add(argp, __cb_event_add, inst); |
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129 | self->filter[self->filter_len++] = argp; |
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130 | return 0; |
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131 | break; |
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132 | #ifndef DEBUG |
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133 | default: |
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134 | break; |
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135 | #endif |
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136 | } |
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137 | |
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138 | roar_err_set(ROAR_ERROR_BADRQC); |
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139 | return -1; |
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140 | } |
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141 | |
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142 | static const struct roar_slfi_filter filter[1] = { |
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143 | { |
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144 | .name = "alternative", |
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145 | .description = "Alternative SLFI filter", |
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146 | .flags = ROAR_SLFI_FLAG_NONE, |
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147 | .init = __init, |
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148 | .uninit = __uninit, |
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149 | .update = __update, |
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150 | .ctl = __ctl |
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151 | } |
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152 | }; |
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153 | |
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154 | ROAR_DL_PLUGIN_REG_SLFI(filter); |
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155 | |
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156 | // This is the plugin control block. |
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157 | ROAR_DL_PLUGIN_START(filter_slfi_alternative) { |
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158 | // Here we set the name and vendor of our plugin. |
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159 | // If you have no Vendor ID you need to use ROAR_DL_PLUGIN_META_PRODUCT_NV(). |
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160 | ROAR_DL_PLUGIN_META_PRODUCT_NIV("filter-slfi-alternative", ROAR_VID_ROARAUDIO, ROAR_VNAME_ROARAUDIO); |
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161 | |
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162 | // This sets the version of your plugin. |
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163 | ROAR_DL_PLUGIN_META_VERSION(ROAR_VERSION_STRING); |
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164 | |
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165 | // This sets the license of your plugin. |
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166 | // If there is no tag for the license you use you can just |
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167 | // use ROAR_DL_PLUGIN_META_LICENSE(). |
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168 | ROAR_DL_PLUGIN_META_LICENSE_TAG(GPLv3_0); |
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169 | |
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170 | // This sets the author and contact infos. |
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171 | // There are several other macros to do this with other parameters. |
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172 | // See ROAR_DL_PLUGIN_META_CONTACT*() in the header or documentation. |
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173 | ROAR_DL_PLUGIN_META_CONTACT_FLNE("Philipp", "Schafft", "ph3-der-loewe", "lion@lion.leolix.org"); |
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174 | |
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175 | // This sets the description for your plugin. |
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176 | ROAR_DL_PLUGIN_META_DESC("This is a container plugin for SLFI filter alternatives."); |
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177 | |
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178 | // Load filters. |
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179 | ROAR_DL_PLUGIN_REG_FNFUNC(ROAR_DL_FN_FILTER); |
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180 | |
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181 | // This is the end of the control block. |
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182 | } ROAR_DL_PLUGIN_END |
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183 | |
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184 | //ll |
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