1 | /* |
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2 | Copyright (C) 2009-2015 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 _AUBIO__FMAT_H |
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22 | #define _AUBIO__FMAT_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 | Matrix of real valued data |
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31 | |
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32 | This file specifies the fmat_t type, which is used in aubio to store arrays |
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33 | of floating point values. |
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34 | |
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35 | \example test-fmat.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 | typedef struct { |
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41 | uint_t length; /**< length of matrix */ |
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42 | uint_t height; /**< height of matrix */ |
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43 | smpl_t **data; /**< data array of size [length] * [height] */ |
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44 | } fmat_t; |
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45 | |
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46 | /** fmat_t buffer creation function |
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47 | |
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48 | \param length the length of the matrix to create |
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49 | \param height the height of the matrix to create |
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50 | |
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51 | */ |
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52 | fmat_t * new_fmat(uint_t height, uint_t length); |
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53 | |
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54 | /** fmat_t buffer deletion function |
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55 | |
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56 | \param s buffer to delete as returned by new_fmat() |
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57 | |
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58 | */ |
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59 | void del_fmat(fmat_t *s); |
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60 | |
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61 | /** read sample value in a buffer |
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62 | |
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63 | \param s vector to read from |
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64 | \param channel channel to read from |
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65 | \param position sample position to read from |
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66 | |
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67 | */ |
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68 | smpl_t fmat_get_sample(const fmat_t *s, uint_t channel, uint_t position); |
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69 | |
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70 | /** write sample value in a buffer |
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71 | |
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72 | \param s vector to write to |
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73 | \param data value to write in s->data[channel][position] |
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74 | \param channel channel to write to |
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75 | \param position sample position to write to |
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76 | |
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77 | */ |
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78 | void fmat_set_sample(fmat_t *s, smpl_t data, uint_t channel, uint_t position); |
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79 | |
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80 | /** read channel vector from a buffer |
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81 | |
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82 | \param s vector to read from |
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83 | \param channel channel to read from |
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84 | \param output ::fvec_t to output to |
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85 | |
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86 | */ |
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87 | void fmat_get_channel (const fmat_t *s, uint_t channel, fvec_t *output); |
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88 | |
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89 | /** get vector buffer from an fmat data |
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90 | |
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91 | \param s vector to read from |
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92 | \param channel channel to read from |
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93 | |
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94 | */ |
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95 | smpl_t * fmat_get_channel_data (const fmat_t *s, uint_t channel); |
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96 | |
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97 | /** read data from a buffer |
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98 | |
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99 | \param s vector to read from |
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100 | |
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101 | */ |
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102 | smpl_t ** fmat_get_data(const fmat_t *s); |
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103 | |
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104 | /** print out fmat data |
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105 | |
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106 | \param s vector to print out |
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107 | |
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108 | */ |
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109 | void fmat_print(const fmat_t *s); |
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110 | |
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111 | /** set all elements to a given value |
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112 | |
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113 | \param s vector to modify |
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114 | \param val value to set elements to |
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115 | |
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116 | */ |
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117 | void fmat_set(fmat_t *s, smpl_t val); |
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118 | |
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119 | /** set all elements to zero |
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120 | |
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121 | \param s vector to modify |
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122 | |
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123 | */ |
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124 | void fmat_zeros(fmat_t *s); |
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125 | |
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126 | /** set all elements to ones |
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127 | |
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128 | \param s vector to modify |
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129 | |
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130 | */ |
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131 | void fmat_ones(fmat_t *s); |
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132 | |
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133 | /** revert order of vector elements |
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134 | |
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135 | \param s vector to revert |
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136 | |
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137 | */ |
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138 | void fmat_rev(fmat_t *s); |
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139 | |
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140 | /** apply weight to vector |
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141 | |
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142 | If the weight vector is longer than s, only the first elements are used. If |
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143 | the weight vector is shorter than s, the last elements of s are not weighted. |
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144 | |
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145 | \param s vector to weight |
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146 | \param weight weighting coefficients |
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147 | |
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148 | */ |
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149 | void fmat_weight(fmat_t *s, const fmat_t *weight); |
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150 | |
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151 | /** make a copy of a matrix |
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152 | |
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153 | \param s source vector |
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154 | \param t vector to copy to |
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155 | |
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156 | */ |
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157 | void fmat_copy(const fmat_t *s, fmat_t *t); |
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158 | |
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159 | /* compute the product of a matrix by a vector |
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160 | |
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161 | \param s matrix to compute product with |
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162 | \param scale vector to compute product with |
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163 | \param output vector to store restults in |
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164 | |
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165 | */ |
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166 | void fmat_vecmul(const fmat_t *s, const fvec_t *scale, fvec_t *output); |
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167 | |
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168 | #ifdef __cplusplus |
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169 | } |
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170 | #endif |
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171 | |
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172 | #endif /* _AUBIO__FMAT_H */ |
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