1 | /* |
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2 | Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org> |
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3 | |
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4 | This file is part of aubio. |
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5 | |
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6 | aubio is free software: you can redistribute it and/or modify |
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7 | it under the terms of the GNU General Public License as published by |
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8 | the Free Software Foundation, either version 3 of the License, or |
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9 | (at your option) any later version. |
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10 | |
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11 | aubio is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | GNU General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU General Public License |
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17 | along with aubio. If not, see <http://www.gnu.org/licenses/>. |
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18 | |
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19 | */ |
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20 | |
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21 | #ifndef _FVEC_H |
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22 | #define _FVEC_H |
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23 | |
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24 | #ifdef __cplusplus |
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25 | extern "C" { |
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26 | #endif |
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27 | |
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28 | /** \file |
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29 | |
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30 | Vector of real-valued data |
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31 | |
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32 | This file specifies the ::fvec_t buffer type, which is used throughout aubio |
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33 | to store vector of real-valued ::smpl_t. |
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34 | |
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35 | \example test-fvec.c |
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36 | |
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37 | */ |
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38 | |
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39 | /** Buffer for real data |
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40 | |
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41 | Vector of real-valued data |
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42 | |
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43 | ::fvec_t is is the structure used to store vector of real-valued data, ::smpl_t . |
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44 | |
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45 | \code |
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46 | |
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47 | uint_t buffer_size = 1024; |
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48 | |
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49 | // create a vector of 512 values |
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50 | fvec_t * input = new_fvec (buffer_size); |
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51 | |
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52 | // set some values of the vector |
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53 | input->data[23] = 2.; |
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54 | // .. |
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55 | |
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56 | // compute the mean of the vector |
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57 | mean = fvec_mean(a_vector); |
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58 | |
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59 | // destroy the vector |
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60 | del_fvec(a_vector); |
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61 | |
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62 | \endcode |
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63 | |
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64 | See `examples/` and `tests/src` directories for more examples. |
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65 | |
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66 | */ |
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67 | typedef struct { |
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68 | uint_t length; /**< length of buffer */ |
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69 | smpl_t *data; /**< data vector of length ::fvec_t.length */ |
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70 | } fvec_t; |
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71 | |
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72 | /** fvec_t buffer creation function |
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73 | |
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74 | \param length the length of the buffer to create |
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75 | |
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76 | */ |
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77 | fvec_t * new_fvec(uint_t length); |
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78 | /** fvec_t buffer deletion function |
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79 | |
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80 | \param s buffer to delete as returned by new_fvec() |
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81 | |
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82 | */ |
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83 | void del_fvec(fvec_t *s); |
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84 | /** read sample value in a buffer |
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85 | |
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86 | Note that this function is not used in the aubio library, since the same |
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87 | result can be obtained using vec->data[position]. Its purpose is to |
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88 | access these values from wrappers, as created by swig. |
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89 | |
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90 | \param s vector to read from |
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91 | \param position sample position to read from |
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92 | |
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93 | */ |
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94 | smpl_t fvec_read_sample(fvec_t *s, uint_t position); |
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95 | /** write sample value in a buffer |
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96 | |
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97 | Note that this function is not used in the aubio library, since the same |
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98 | result can be obtained by assigning vec->data[position]. Its purpose |
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99 | is to access these values from wrappers, as created by swig. |
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100 | |
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101 | \param s vector to write to |
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102 | \param data value to write in s->data[position] |
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103 | \param position sample position to write to |
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104 | |
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105 | */ |
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106 | void fvec_write_sample(fvec_t *s, smpl_t data, uint_t position); |
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107 | |
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108 | /** read data from a buffer |
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109 | |
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110 | Note that this function is not used in the aubio library, since the same |
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111 | result can be obtained with vec->data. Its purpose is to access these values |
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112 | from wrappers, as created by swig. |
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113 | |
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114 | \param s vector to read from |
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115 | |
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116 | */ |
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117 | smpl_t * fvec_get_data(fvec_t *s); |
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118 | |
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119 | /** print out fvec data |
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120 | |
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121 | \param s vector to print out |
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122 | |
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123 | */ |
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124 | void fvec_print(fvec_t *s); |
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125 | |
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126 | /** set all elements to a given value |
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127 | |
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128 | \param s vector to modify |
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129 | \param val value to set elements to |
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130 | |
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131 | */ |
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132 | void fvec_set(fvec_t *s, smpl_t val); |
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133 | |
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134 | /** set all elements to zero |
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135 | |
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136 | \param s vector to modify |
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137 | |
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138 | */ |
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139 | void fvec_zeros(fvec_t *s); |
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140 | |
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141 | /** set all elements to ones |
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142 | |
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143 | \param s vector to modify |
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144 | |
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145 | */ |
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146 | void fvec_ones(fvec_t *s); |
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147 | |
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148 | /** revert order of vector elements |
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149 | |
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150 | \param s vector to revert |
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151 | |
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152 | */ |
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153 | void fvec_rev(fvec_t *s); |
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154 | |
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155 | /** apply weight to vector |
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156 | |
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157 | If the weight vector is longer than s, only the first elements are used. If |
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158 | the weight vector is shorter than s, the last elements of s are not weighted. |
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159 | |
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160 | \param s vector to weight |
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161 | \param weight weighting coefficients |
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162 | |
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163 | */ |
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164 | void fvec_weight(fvec_t *s, fvec_t *weight); |
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165 | |
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166 | /** make a copy of a vector |
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167 | |
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168 | \param s source vector |
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169 | \param t vector to copy to |
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170 | |
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171 | */ |
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172 | void fvec_copy(fvec_t *s, fvec_t *t); |
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173 | |
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174 | #ifdef __cplusplus |
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175 | } |
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176 | #endif |
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177 | |
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178 | #endif /* _FVEC_H */ |
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