1 | //filter-slfi-random.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_CHANNELS 64 |
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30 | |
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31 | struct slfi_channel { |
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32 | ssize_t channel; |
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33 | int32_t time_end; |
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34 | int32_t time_cur; |
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35 | int32_t time_max; |
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36 | uint8_t value_start; |
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37 | uint8_t value_end; |
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38 | }; |
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39 | |
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40 | struct slfi_random { |
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41 | struct slfi_channel channel[MAX_CHANNELS]; |
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42 | size_t channel_len; |
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43 | }; |
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44 | |
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45 | static inline void parse_range(ssize_t * channel, ssize_t * channel_stop, const char * str) { |
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46 | char * delm; |
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47 | char * buf; |
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48 | |
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49 | if ( strstr(str, "-") == NULL ) { |
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50 | *channel = atoi(str); |
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51 | *channel_stop = *channel; |
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52 | return; |
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53 | } |
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54 | |
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55 | buf = roar_mm_strdup(str); |
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56 | if ( buf == NULL ) { |
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57 | ROAR_WARN("Can not allocate memory: %s", roar_errorstring); |
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58 | *channel = 0; |
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59 | *channel_stop = 0; |
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60 | return; |
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61 | } |
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62 | |
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63 | delm = strstr(buf, "-"); |
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64 | *delm = 0; |
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65 | delm++; |
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66 | |
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67 | *channel = atoi(buf); |
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68 | *channel_stop = atoi(delm); |
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69 | |
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70 | if ( *channel_stop < *channel ) |
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71 | *channel_stop = *channel; |
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72 | |
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73 | roar_mm_free(buf); |
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74 | } |
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75 | |
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76 | static int __init(struct roar_slfi_inst * inst, const struct roar_keyval * para, ssize_t paralen) { |
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77 | struct slfi_random * self = roar_mm_malloc(sizeof(struct slfi_random)); |
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78 | const struct roar_keyval * kv; |
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79 | ssize_t i; |
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80 | int32_t time_max = 2000000L; |
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81 | ssize_t channel, channel_stop; |
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82 | |
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83 | if ( self == NULL ) |
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84 | return -1; |
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85 | |
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86 | memset(self, 0, sizeof(*self)); |
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87 | inst->userdata = self; |
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88 | |
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89 | for (i = 0; i < (ssize_t)MAX_CHANNELS; i++) { |
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90 | self->channel[i].channel = -1; |
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91 | self->channel[i].time_end = 0; |
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92 | self->channel[i].time_cur = 0; |
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93 | self->channel[i].value_start = 0; |
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94 | } |
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95 | |
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96 | for (i = 0; i < paralen; i++) { |
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97 | kv = &(para[i]); |
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98 | if ( kv->key == NULL || kv->value == NULL ) |
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99 | continue; |
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100 | |
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101 | if ( !strcmp(kv->key, "time-max") ) { |
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102 | time_max = roar_str2usec(kv->value); |
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103 | if ( time_max < 0 ) |
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104 | time_max = 2000000L; |
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105 | } else if ( !strcmp(kv->key, "channel") ) { |
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106 | parse_range(&channel, &channel_stop, kv->value); |
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107 | for (; channel <= channel_stop; channel++) { |
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108 | if ( self->channel_len == MAX_CHANNELS ) { |
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109 | ROAR_WARN("__init(*): Can not add (list is full) channel: %s", kv->value); |
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110 | continue; |
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111 | } |
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112 | self->channel[self->channel_len].channel = channel; |
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113 | self->channel[self->channel_len].time_max = time_max; |
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114 | self->channel_len++; |
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115 | } |
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116 | } else { |
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117 | ROAR_WARN("__init(*): Unknown parameter: %s", kv->key); |
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118 | } |
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119 | } |
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120 | |
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121 | return 0; |
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122 | } |
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123 | |
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124 | static inline void calc_end(struct slfi_channel * channel) { |
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125 | if ( channel->time_cur <= channel->time_end ) |
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126 | return; |
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127 | |
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128 | channel->time_cur = 0; |
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129 | channel->time_end = (int32_t)1 + (int32_t)roar_random_uint16() * ((channel->time_max-1) / 65536L); |
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130 | channel->value_start = channel->value_end; |
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131 | |
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132 | if ( roar_random_uint16() < 32768 ) |
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133 | return; |
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134 | |
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135 | channel->value_end = roar_random_uint16() & 0xE0; |
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136 | } |
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137 | |
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138 | static inline uint8_t calc_channel(struct slfi_channel * channel) { |
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139 | double trel = (double)channel->time_cur/(double)channel->time_end; |
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140 | double valdiff = (double)(channel->value_end - channel->value_start)*trel; |
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141 | |
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142 | valdiff += (double)channel->value_start; |
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143 | |
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144 | return (uint8_t)(unsigned int)(int)valdiff; |
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145 | } |
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146 | |
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147 | 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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148 | struct slfi_random * self = inst->userdata; |
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149 | struct slfi_channel * channel; |
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150 | size_t i; |
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151 | |
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152 | (void)inst, (void)event, (void)eventlen; |
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153 | |
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154 | for (i = 0; i < self->channel_len; i++) { |
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155 | channel = &(self->channel[i]); |
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156 | if ( channel->channel >= size_of_universe ) { |
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157 | ROAR_WARN("__update(*): Universe too small for filter."); |
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158 | continue; |
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159 | } |
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160 | calc_end(channel); |
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161 | universe[channel->channel] = calc_channel(channel); |
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162 | channel->time_cur += usecspassed; |
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163 | } |
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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 | static const struct roar_slfi_filter filter[1] = { |
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169 | { |
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170 | .name = "random", |
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171 | .description = "Random SLFI filter", |
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172 | .flags = ROAR_SLFI_FLAG_ON_UPDATE, |
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173 | .init = __init, |
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174 | .uninit = NULL, |
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175 | .update = __update, |
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176 | .ctl = NULL |
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177 | } |
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178 | }; |
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179 | |
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180 | ROAR_DL_PLUGIN_REG_SLFI(filter); |
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181 | |
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182 | // This is the plugin control block. |
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183 | ROAR_DL_PLUGIN_START(filter_slfi_random) { |
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184 | // Here we set the name and vendor of our plugin. |
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185 | // If you have no Vendor ID you need to use ROAR_DL_PLUGIN_META_PRODUCT_NV(). |
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186 | ROAR_DL_PLUGIN_META_PRODUCT_NIV("filter-slfi-random", ROAR_VID_ROARAUDIO, ROAR_VNAME_ROARAUDIO); |
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187 | |
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188 | // This sets the version of your plugin. |
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189 | ROAR_DL_PLUGIN_META_VERSION(ROAR_VERSION_STRING); |
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190 | |
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191 | // This sets the license of your plugin. |
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192 | // If there is no tag for the license you use you can just |
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193 | // use ROAR_DL_PLUGIN_META_LICENSE(). |
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194 | ROAR_DL_PLUGIN_META_LICENSE_TAG(GPLv3_0); |
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195 | |
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196 | // This sets the author and contact infos. |
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197 | // There are several other macros to do this with other parameters. |
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198 | // See ROAR_DL_PLUGIN_META_CONTACT*() in the header or documentation. |
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199 | ROAR_DL_PLUGIN_META_CONTACT_FLNE("Philipp", "Schafft", "ph3-der-loewe", "lion@lion.leolix.org"); |
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200 | |
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201 | // This sets the description for your plugin. |
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202 | ROAR_DL_PLUGIN_META_DESC("This plugin sets random values. It can be used for fireflies or moodlights"); |
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203 | |
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204 | // Load filters. |
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205 | ROAR_DL_PLUGIN_REG_FNFUNC(ROAR_DL_FN_FILTER); |
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206 | |
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207 | // This is the end of the control block. |
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208 | } ROAR_DL_PLUGIN_END |
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209 | |
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210 | //ll |
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