1 | #include "aubio-types.h" |
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2 | |
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3 | static char Py_fft_doc[] = "" |
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4 | "fft(size=1024)\n" |
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5 | "\n" |
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6 | "Compute Fast Fourier Transorms.\n" |
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7 | "\n" |
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8 | "Parameters\n" |
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9 | "----------\n" |
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10 | "size : int\n" |
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11 | " size of the FFT to compute\n" |
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12 | "\n" |
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13 | "Example\n" |
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14 | "-------\n" |
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15 | ">>> x = aubio.fvec(512)\n" |
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16 | ">>> f = aubio.fft(512)\n" |
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17 | ">>> c = f(x); c\n" |
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18 | "aubio cvec of 257 elements\n" |
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19 | ">>> x2 = f.rdo(c); x2.shape\n" |
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20 | "(512,)\n" |
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21 | ""; |
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22 | |
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23 | typedef struct |
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24 | { |
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25 | PyObject_HEAD |
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26 | aubio_fft_t * o; |
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27 | uint_t win_s; |
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28 | // do / rdo input vectors |
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29 | fvec_t vecin; |
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30 | cvec_t cvecin; |
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31 | // do / rdo output results |
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32 | PyObject *doout; |
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33 | PyObject *rdoout; |
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34 | } Py_fft; |
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35 | |
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36 | static PyObject * |
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37 | Py_fft_new (PyTypeObject * type, PyObject * args, PyObject * kwds) |
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38 | { |
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39 | int win_s = 0; |
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40 | Py_fft *self; |
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41 | static char *kwlist[] = { "win_s", NULL }; |
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42 | |
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43 | if (!PyArg_ParseTupleAndKeywords (args, kwds, "|I", kwlist, |
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44 | &win_s)) { |
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45 | return NULL; |
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46 | } |
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47 | |
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48 | self = (Py_fft *) type->tp_alloc (type, 0); |
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49 | |
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50 | if (self == NULL) { |
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51 | return NULL; |
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52 | } |
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53 | |
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54 | self->win_s = Py_default_vector_length; |
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55 | |
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56 | if (win_s > 0) { |
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57 | self->win_s = win_s; |
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58 | } else if (win_s < 0) { |
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59 | PyErr_SetString (PyExc_ValueError, |
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60 | "can not use negative window size"); |
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61 | return NULL; |
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62 | } |
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63 | |
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64 | return (PyObject *) self; |
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65 | } |
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66 | |
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67 | static int |
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68 | Py_fft_init (Py_fft * self, PyObject * args, PyObject * kwds) |
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69 | { |
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70 | self->o = new_aubio_fft (self->win_s); |
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71 | if (self->o == NULL) { |
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72 | // PyErr_Format(PyExc_RuntimeError, ...) was set above by new_ which called |
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73 | // AUBIO_ERR when failing |
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74 | return -1; |
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75 | } |
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76 | |
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77 | self->doout = new_py_cvec(self->win_s); |
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78 | self->rdoout = new_py_fvec(self->win_s); |
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79 | |
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80 | return 0; |
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81 | } |
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82 | |
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83 | static void |
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84 | Py_fft_del (Py_fft *self, PyObject *unused) |
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85 | { |
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86 | Py_XDECREF(self->doout); |
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87 | Py_XDECREF(self->rdoout); |
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88 | if (self->o) { |
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89 | del_aubio_fft(self->o); |
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90 | } |
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91 | Py_TYPE(self)->tp_free((PyObject *) self); |
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92 | } |
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93 | |
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94 | static PyObject * |
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95 | Py_fft_do(Py_fft * self, PyObject * args) |
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96 | { |
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97 | PyObject *input; |
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98 | cvec_t c_out; |
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99 | |
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100 | if (!PyArg_ParseTuple (args, "O", &input)) { |
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101 | return NULL; |
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102 | } |
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103 | |
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104 | if (!PyAubio_ArrayToCFvec(input, &(self->vecin))) { |
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105 | return NULL; |
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106 | } |
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107 | |
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108 | if (self->vecin.length != self->win_s) { |
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109 | PyErr_Format(PyExc_ValueError, |
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110 | "input array has length %d, but fft expects length %d", |
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111 | self->vecin.length, self->win_s); |
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112 | return NULL; |
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113 | } |
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114 | |
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115 | Py_INCREF(self->doout); |
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116 | if (!PyAubio_PyCvecToCCvec(self->doout, &c_out)) { |
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117 | return NULL; |
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118 | } |
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119 | // compute the function |
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120 | aubio_fft_do (self->o, &(self->vecin), &c_out); |
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121 | return self->doout; |
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122 | } |
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123 | |
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124 | static PyMemberDef Py_fft_members[] = { |
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125 | {"win_s", T_INT, offsetof (Py_fft, win_s), READONLY, |
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126 | "size of the window"}, |
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127 | {NULL} |
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128 | }; |
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129 | |
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130 | static PyObject * |
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131 | Py_fft_rdo(Py_fft * self, PyObject * args) |
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132 | { |
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133 | PyObject *input; |
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134 | fvec_t out; |
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135 | |
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136 | if (!PyArg_ParseTuple (args, "O", &input)) { |
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137 | return NULL; |
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138 | } |
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139 | |
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140 | if (!PyAubio_PyCvecToCCvec (input, &(self->cvecin)) ) { |
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141 | return NULL; |
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142 | } |
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143 | |
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144 | if (self->cvecin.length != self->win_s / 2 + 1) { |
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145 | PyErr_Format(PyExc_ValueError, |
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146 | "input cvec has length %d, but fft expects length %d", |
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147 | self->cvecin.length, self->win_s / 2 + 1); |
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148 | return NULL; |
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149 | } |
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150 | |
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151 | Py_INCREF(self->rdoout); |
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152 | if (!PyAubio_ArrayToCFvec(self->rdoout, &out) ) { |
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153 | return NULL; |
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154 | } |
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155 | // compute the function |
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156 | aubio_fft_rdo (self->o, &(self->cvecin), &out); |
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157 | return self->rdoout; |
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158 | } |
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159 | |
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160 | static PyMethodDef Py_fft_methods[] = { |
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161 | {"rdo", (PyCFunction) Py_fft_rdo, METH_VARARGS, |
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162 | "synthesis of spectral grain"}, |
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163 | {NULL} |
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164 | }; |
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165 | |
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166 | PyTypeObject Py_fftType = { |
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167 | PyVarObject_HEAD_INIT (NULL, 0) |
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168 | "aubio.fft", |
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169 | sizeof (Py_fft), |
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170 | 0, |
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171 | (destructor) Py_fft_del, |
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172 | 0, |
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173 | 0, |
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174 | 0, |
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175 | 0, |
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176 | 0, |
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177 | 0, |
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178 | 0, |
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179 | 0, |
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180 | 0, |
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181 | (ternaryfunc)Py_fft_do, |
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182 | 0, |
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183 | 0, |
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184 | 0, |
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185 | 0, |
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186 | Py_TPFLAGS_DEFAULT, |
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187 | Py_fft_doc, |
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188 | 0, |
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189 | 0, |
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190 | 0, |
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191 | 0, |
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192 | 0, |
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193 | 0, |
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194 | Py_fft_methods, |
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195 | Py_fft_members, |
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196 | 0, |
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197 | 0, |
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198 | 0, |
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199 | 0, |
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200 | 0, |
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201 | 0, |
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202 | (initproc) Py_fft_init, |
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203 | 0, |
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204 | Py_fft_new, |
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205 | 0, |
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206 | 0, |
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207 | 0, |
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208 | 0, |
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209 | 0, |
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210 | 0, |
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211 | 0, |
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212 | 0, |
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213 | 0, |
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214 | }; |
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