1 | //filter-slfi-calc.c: |
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2 | |
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3 | /* |
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4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2012-2015 |
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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_IN 8 |
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30 | |
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31 | enum slfi_calctype { |
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32 | CT_NULL = 0, |
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33 | CT_ADD, |
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34 | CT_SUB, |
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35 | CT_MUL, |
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36 | CT_DIV, |
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37 | CT_MOD, |
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38 | CT_LOG, |
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39 | CT_EXP, |
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40 | CT_SQRT, |
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41 | CT_POW, |
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42 | CT_SUM, // sum of all samples |
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43 | CT_DXDT // dx/dt. |
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44 | }; |
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45 | |
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46 | enum slfi_numbersystem { |
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47 | NS_AUTO = 0, |
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48 | NS_CLIP, |
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49 | NS_SCALE |
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50 | }; |
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51 | |
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52 | // flags: |
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53 | #define CF_NONE 0x00000000U |
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54 | #define CF_I 0x00000001U |
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55 | #define CF_ABS 0x00000002U |
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56 | |
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57 | struct slfi_calc { |
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58 | enum slfi_calctype ct; |
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59 | enum slfi_numbersystem ns; |
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60 | uint32_t flags; |
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61 | int_least32_t i; // i-flag register |
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62 | int_least32_t c; // register to store inter-interval values. |
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63 | ssize_t channel_out; |
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64 | ssize_t channel_in[MAX_CHANNELS_IN]; |
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65 | ssize_t channel_in_num; |
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66 | }; |
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67 | |
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68 | static inline void __init_calc(struct slfi_calc * calc) { |
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69 | size_t i; |
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70 | |
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71 | memset(calc, 0, sizeof(*calc)); |
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72 | |
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73 | calc->ct = CT_NULL; |
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74 | calc->ns = NS_AUTO; |
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75 | calc->flags = CF_NONE; |
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76 | calc->i = 0; |
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77 | calc->c = 0; |
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78 | calc->channel_out = -1; |
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79 | calc->channel_in_num = 0; |
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80 | |
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81 | for (i = 0; i < MAX_CHANNELS_IN; i++) |
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82 | calc->channel_in[i] = -1; |
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83 | } |
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84 | |
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85 | static int __push_calc(const struct slfi_calc * calc, struct slfi_calc ** array, size_t * arraylen, size_t * arrayptr) { |
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86 | struct slfi_calc * new; |
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87 | int err; |
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88 | size_t i; |
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89 | |
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90 | if ( *arrayptr == *arraylen ) { |
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91 | new = roar_mm_realloc(*array, sizeof(struct slfi_calc)*(*arraylen + 8)); |
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92 | err = roar_error; |
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93 | if ( new == NULL ) { |
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94 | roar_mm_free(*array); |
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95 | roar_err_set(err); |
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96 | *array = NULL; |
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97 | *arraylen = 0; |
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98 | *arrayptr = 0; |
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99 | return -1; |
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100 | } |
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101 | for (i = *arrayptr + 1; i < (*arrayptr + 8); i++) |
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102 | __init_calc(&(new[i])); |
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103 | *array = new; |
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104 | *arraylen += 8; |
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105 | } |
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106 | |
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107 | (*array)[*arrayptr] = *calc; |
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108 | (*arrayptr)++; |
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109 | return 0; |
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110 | } |
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111 | |
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112 | static inline enum slfi_calctype __parse_calc_ct(const char * str, const char ** flags) { |
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113 | const struct { |
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114 | const char * name; |
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115 | const enum slfi_calctype ct; |
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116 | } *p, __table[] = { |
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117 | {"NULL", CT_NULL}, |
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118 | {"add", CT_ADD}, |
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119 | {"sub", CT_SUB}, |
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120 | {"mul", CT_MUL}, |
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121 | {"div", CT_DIV}, |
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122 | {"mod", CT_MOD}, |
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123 | {"log", CT_LOG}, |
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124 | {"exp", CT_EXP}, |
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125 | {"sqrt", CT_SQRT}, |
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126 | {"pow", CT_POW}, |
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127 | {"sum", CT_SUM}, |
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128 | {"dxdt", CT_DXDT}, |
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129 | {NULL, CT_NULL} // list terminator. |
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130 | }; |
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131 | ssize_t len; |
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132 | |
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133 | for (p = __table; p->name != NULL; p++) { |
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134 | len = roar_mm_strlen(p->name); |
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135 | if ( !strncasecmp(str, p->name, len) ) { |
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136 | *flags = str+len; |
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137 | return p->ct; |
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138 | } |
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139 | } |
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140 | *flags = NULL; |
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141 | return CT_NULL; |
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142 | } |
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143 | |
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144 | static inline const struct slfi_calc * __parse_calc(const char * key, const char * value) { |
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145 | static struct slfi_calc calc; |
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146 | const char * flags; |
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147 | char * valbuf, * cur, * saveptr; |
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148 | size_t i; |
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149 | int found_error = 0; |
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150 | |
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151 | if ( !*value ) |
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152 | return NULL; |
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153 | |
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154 | __init_calc(&calc); |
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155 | |
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156 | /* |
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157 | calc->i = 0; |
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158 | calc->channel_out = -1; |
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159 | */ |
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160 | |
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161 | calc.ct = __parse_calc_ct(key, &flags); |
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162 | if ( calc.ct == CT_NULL ) |
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163 | return NULL; |
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164 | |
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165 | if ( flags != NULL ) { |
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166 | for (; *flags; flags++) { |
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167 | switch (*flags) { |
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168 | // normal flags: |
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169 | case 'i': calc.flags |= CF_I; break; |
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170 | case 'a': calc.flags |= CF_ABS; break; |
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171 | |
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172 | // system: |
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173 | case 's': calc.ns = NS_SCALE; break; |
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174 | case 'c': calc.ns = NS_CLIP; break; |
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175 | default: |
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176 | ROAR_ERR("__parse_calc(key='%s', value='%s'): Unknown flag: %c", key, value, *flags); |
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177 | return NULL; |
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178 | } |
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179 | } |
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180 | } |
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181 | |
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182 | valbuf = roar_mm_strdup(value); |
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183 | if ( valbuf == NULL ) |
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184 | return NULL; |
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185 | |
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186 | cur = roar_mm_strtok_r(valbuf, ":", &saveptr); |
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187 | |
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188 | calc.channel_out = atoi(cur); |
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189 | |
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190 | i = 0; |
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191 | while ((cur = roar_mm_strtok_r(NULL, ":", &saveptr)) != NULL) { |
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192 | calc.channel_in[i] = atoi(cur); |
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193 | calc.channel_in_num++; |
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194 | if ( calc.channel_in[i] < 0 || (i+1) == MAX_CHANNELS_IN ) { |
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195 | found_error = 1; |
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196 | break; |
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197 | } |
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198 | i++; |
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199 | } |
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200 | |
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201 | roar_mm_free(valbuf); |
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202 | |
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203 | if ( found_error ) |
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204 | return NULL; |
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205 | |
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206 | if ( calc.flags & CF_I ) { |
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207 | for (i = 1; i < MAX_CHANNELS_IN; i++) { |
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208 | if ( calc.channel_in[i] == -1 ) { |
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209 | calc.i = calc.channel_in[i-1]; |
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210 | calc.channel_in[i-1] = -1; |
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211 | calc.channel_in_num--; |
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212 | break; |
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213 | } |
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214 | } |
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215 | } |
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216 | |
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217 | if ( calc.ct == CT_NULL || calc.ns == NS_AUTO || calc.channel_out < 0 ) |
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218 | return NULL; |
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219 | return &calc; |
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220 | } |
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221 | |
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222 | static int __init(struct roar_slfi_inst * inst, const struct roar_keyval * para, ssize_t paralen) { |
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223 | const struct slfi_calc * calc; |
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224 | struct slfi_calc * array = NULL; |
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225 | size_t arraylen = 0; |
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226 | size_t arrayptr = 0; |
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227 | const struct roar_keyval * kv; |
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228 | ssize_t i; |
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229 | |
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230 | for (i = 0; i < paralen; i++) { |
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231 | kv = &(para[i]); |
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232 | if ( kv->key == NULL || kv->value == NULL ) |
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233 | continue; |
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234 | |
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235 | if ( (calc = __parse_calc(kv->key, kv->value)) != NULL ) { |
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236 | if ( __push_calc(calc, &array, &arraylen, &arrayptr) == -1 ) { |
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237 | ROAR_ERR("__init(*): Can not add more calculations: %s", roar_errorstring); |
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238 | return -1; |
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239 | } |
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240 | // } else if ( !strcmp(kv->key, "") ) { |
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241 | } else { |
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242 | ROAR_WARN("__init(*): Unknown parameter: %s", kv->key); |
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243 | } |
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244 | } |
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245 | |
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246 | inst->userdata = array; |
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247 | return 0; |
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248 | } |
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249 | |
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250 | static inline int_least32_t __calc_step(int_least32_t val, uint8_t in, enum slfi_calctype ct, enum slfi_numbersystem ns) { |
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251 | switch (ct) { |
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252 | case CT_SUM: |
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253 | case CT_ADD: val += in; break; |
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254 | case CT_SUB: val -= in; break; |
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255 | case CT_MUL: val *= in; break; |
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256 | case CT_DIV: val /= in; break; |
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257 | case CT_MOD: val %= in; break; |
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258 | default: |
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259 | roar_panic(ROAR_FATAL_ERROR_CPU_FAILURE, NULL); // we should never reach this point at all. |
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260 | break; |
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261 | } |
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262 | |
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263 | switch (ns) { |
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264 | case NS_AUTO: break; |
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265 | case NS_CLIP: |
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266 | if ( val > 255 ) { |
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267 | val = 255; |
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268 | } else if ( val < 0 ) { |
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269 | val = 0; |
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270 | } |
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271 | break; |
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272 | case NS_SCALE: |
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273 | switch (ct) { |
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274 | case CT_MUL: |
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275 | val /= 255; |
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276 | break; |
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277 | default: /* NOOPs */; break; |
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278 | } |
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279 | break; |
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280 | } |
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281 | |
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282 | return val; |
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283 | } |
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284 | |
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285 | static inline void __calc(struct slfi_calc * calc, uint8_t * universe, ssize_t size_of_universe, int32_t usecspassed) { |
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286 | int_least32_t val = 0; |
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287 | ssize_t i; |
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288 | |
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289 | (void)usecspassed; // needed for CT_DXDT. |
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290 | |
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291 | if ( calc->channel_out >= size_of_universe ) { |
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292 | ROAR_WARN("__calc(*): Output channel outside universe!"); |
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293 | return; |
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294 | } |
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295 | |
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296 | if ( calc->channel_in_num ) { |
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297 | if ( calc->channel_in[0] >= size_of_universe ) { |
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298 | ROAR_WARN("__calc(*): Initial Input channel outside universe!"); |
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299 | return; |
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300 | } |
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301 | val = universe[calc->channel_in[0]]; |
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302 | } else if ( calc->flags & CF_I ) { |
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303 | val = calc->i; |
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304 | } |
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305 | |
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306 | switch (calc->ct) { |
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307 | case CT_NULL: return; break; |
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308 | case CT_LOG: |
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309 | case CT_SQRT: |
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310 | case CT_POW: |
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311 | case CT_DXDT: |
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312 | ROAR_ERR("__calc(*): Operation not supported"); |
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313 | return; |
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314 | break; |
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315 | case CT_SUM: |
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316 | val += calc->c; |
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317 | case CT_ADD: |
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318 | case CT_SUB: |
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319 | case CT_MUL: |
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320 | case CT_DIV: |
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321 | case CT_MOD: |
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322 | case CT_EXP: |
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323 | for (i = 1; i < calc->channel_in_num; i++) { |
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324 | if ( calc->channel_in[i] >= size_of_universe ) { |
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325 | ROAR_WARN("__calc(*): Input channel outside universe!"); |
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326 | return; |
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327 | } |
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328 | val = __calc_step(val, universe[calc->channel_in[i]], calc->ct, calc->ns); |
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329 | } |
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330 | |
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331 | if ( calc->channel_in_num && calc->flags & CF_I ) { |
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332 | ROAR_DBG("__calc(*): calc->channel_in_num=%i, calc->i=%i", (int)calc->channel_in_num, (int)calc->i); |
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333 | val = __calc_step(val, calc->i, calc->ct, calc->ns); |
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334 | } |
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335 | break; |
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336 | } |
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337 | |
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338 | switch (calc->ct) { |
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339 | case CT_NULL: break; |
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340 | case CT_SUM: |
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341 | calc->c = val; |
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342 | break; |
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343 | case CT_ADD: |
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344 | case CT_SUB: |
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345 | if ( calc->ns == NS_SCALE ) |
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346 | val /= calc->channel_in_num + (calc->flags & CF_I ? 1 : 0); |
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347 | break; |
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348 | // NOOPs: |
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349 | case CT_MUL: |
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350 | case CT_DIV: |
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351 | case CT_MOD: |
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352 | case CT_EXP: |
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353 | break; |
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354 | default: |
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355 | ROAR_ERR("__calc(*): Operation not supported"); |
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356 | break; |
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357 | } |
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358 | |
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359 | if ( calc->flags & CF_ABS ) |
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360 | val = abs(val); |
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361 | |
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362 | universe[calc->channel_out] = val; |
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363 | } |
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364 | |
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365 | 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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366 | struct slfi_calc * self = inst->userdata; |
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367 | |
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368 | (void)event, (void)eventlen; |
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369 | |
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370 | while (self->channel_out != -1) { |
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371 | __calc(self, universe, size_of_universe, usecspassed); |
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372 | self++; |
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373 | } |
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374 | |
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375 | return 0; |
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376 | } |
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377 | |
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378 | static const struct roar_slfi_filter filter[1] = { |
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379 | { |
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380 | .name = "calc", |
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381 | .description = "Calc SLFI filter", |
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382 | .flags = ROAR_SLFI_FLAG_ON_UPDATE, |
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383 | .init = __init, |
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384 | .uninit = NULL, |
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385 | .update = __update, |
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386 | .ctl = NULL |
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387 | } |
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388 | }; |
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389 | |
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390 | ROAR_DL_PLUGIN_REG_SLFI(filter); |
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391 | |
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392 | // This is the plugin control block. |
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393 | ROAR_DL_PLUGIN_START(filter_slfi_calc) { |
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394 | // Here we set the name and vendor of our plugin. |
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395 | // If you have no Vendor ID you need to use ROAR_DL_PLUGIN_META_PRODUCT_NV(). |
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396 | ROAR_DL_PLUGIN_META_PRODUCT_NIV("filter-slfi-calc", ROAR_VID_ROARAUDIO, ROAR_VNAME_ROARAUDIO); |
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397 | |
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398 | // This sets the version of your plugin. |
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399 | ROAR_DL_PLUGIN_META_VERSION(ROAR_VERSION_STRING); |
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400 | |
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401 | // This sets the license of your plugin. |
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402 | // If there is no tag for the license you use you can just |
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403 | // use ROAR_DL_PLUGIN_META_LICENSE(). |
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404 | ROAR_DL_PLUGIN_META_LICENSE_TAG(GPLv3_0); |
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405 | |
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406 | // This sets the author and contact infos. |
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407 | // There are several other macros to do this with other parameters. |
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408 | // See ROAR_DL_PLUGIN_META_CONTACT*() in the header or documentation. |
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409 | ROAR_DL_PLUGIN_META_CONTACT_FLNE("Philipp", "Schafft", "ph3-der-loewe", "lion@lion.leolix.org"); |
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410 | |
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411 | // This sets the description for your plugin. |
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412 | ROAR_DL_PLUGIN_META_DESC("This plugin calculates values of channels."); |
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413 | |
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414 | // Load filters. |
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415 | ROAR_DL_PLUGIN_REG_FNFUNC(ROAR_DL_FN_FILTER); |
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416 | |
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417 | // This is the end of the control block. |
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418 | } ROAR_DL_PLUGIN_END |
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419 | |
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420 | //ll |
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