Generated by Cython 0.28.4
Yellow lines hint at Python interaction.
Click on a line that starts with a "+
" to see the C code that Cython generated for it.
Raw output: interpolation.c
+01: # cython: language_level=3
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02:
+03: import numpy as np
__pyx_t_1 = __Pyx_Import(__pyx_n_s_numpy, 0, 0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 3, __pyx_L1_error) __Pyx_GOTREF(__pyx_t_1); if (PyDict_SetItem(__pyx_d, __pyx_n_s_np, __pyx_t_1) < 0) __PYX_ERR(0, 3, __pyx_L1_error) __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
04: cimport cython
05: from libc cimport math
06:
+07: ctypedef double (*get_sample_t)(double x, double y0, double y1, double y2, double y3)
typedef double (*__pyx_t_5pippi_13interpolation_get_sample_t)(double, double, double, double, double);
08:
09: @cython.boundscheck(False)
10: @cython.wraparound(False)
+11: cdef double hermite_get_sample(double x, double y0, double y1, double y2, double y3):
static double __pyx_f_5pippi_13interpolation_hermite_get_sample(double __pyx_v_x, double __pyx_v_y0, double __pyx_v_y1, double __pyx_v_y2, double __pyx_v_y3) { double __pyx_v_c0; double __pyx_v_c1; double __pyx_v_c3; double __pyx_v_c2; double __pyx_r; __Pyx_RefNannyDeclarations __Pyx_RefNannySetupContext("hermite_get_sample", 0); /* … */ /* function exit code */ __pyx_L0:; __Pyx_RefNannyFinishContext(); return __pyx_r; }
12: """ Taken from version #2 by James McCartney
13: http://musicdsp.org/showone.php?id=93
14: """
+15: cdef double c0 = y1
__pyx_v_c0 = __pyx_v_y1;
+16: cdef double c1 = 0.5 * (y2 - y0)
__pyx_v_c1 = (0.5 * (__pyx_v_y2 - __pyx_v_y0));
+17: cdef double c3 = 1.5 * (y1 - y2) + 0.5 * (y3 - y0)
__pyx_v_c3 = ((1.5 * (__pyx_v_y1 - __pyx_v_y2)) + (0.5 * (__pyx_v_y3 - __pyx_v_y0)));
+18: cdef double c2 = y0 - y1 + c1 - c3
__pyx_v_c2 = (((__pyx_v_y0 - __pyx_v_y1) + __pyx_v_c1) - __pyx_v_c3);
19:
+20: return ((c3 * x + c2) * x + c1) * x + c0
__pyx_r = ((((((__pyx_v_c3 * __pyx_v_x) + __pyx_v_c2) * __pyx_v_x) + __pyx_v_c1) * __pyx_v_x) + __pyx_v_c0); goto __pyx_L0;
21:
+22: cdef public double[:] _hermite(double[:] data, int length):
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+23: cdef int fi = 0
__pyx_v_fi = 0;
+24: cdef double[:] out = np.zeros(length)
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+25: cdef get_sample_t get_sample = hermite_get_sample
__pyx_v_get_sample = __pyx_f_5pippi_13interpolation_hermite_get_sample;
+26: cdef int datalen = len(data)
__pyx_t_7 = __Pyx_MemoryView_Len(__pyx_v_data);
__pyx_v_datalen = __pyx_t_7;
+27: cdef int i0, i1, i2 = 0
__pyx_v_i2 = 0;
+28: cdef int pos = 0
__pyx_v_pos = 0;
29:
+30: for fi in range(length):
__pyx_t_8 = __pyx_v_length; __pyx_t_9 = __pyx_t_8; for (__pyx_t_10 = 0; __pyx_t_10 < __pyx_t_9; __pyx_t_10+=1) { __pyx_v_fi = __pyx_t_10;
+31: x = fi / float(length)
if (unlikely(((double)__pyx_v_length) == 0)) { PyErr_SetString(PyExc_ZeroDivisionError, "float division"); __PYX_ERR(0, 31, __pyx_L1_error) } __pyx_v_x = (((double)__pyx_v_fi) / ((double)__pyx_v_length));
+32: pos = <int>(x * datalen)
__pyx_v_pos = ((int)(__pyx_v_x * __pyx_v_datalen));
33:
+34: i0 = (pos - 1) % datalen
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+35: i1 = (pos + 1) % datalen
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+36: i2 = (pos + 2) % datalen
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37:
+38: out[fi] = get_sample(x, data[i0], data[pos], data[i1], data[i2])
__pyx_t_12 = __pyx_v_i0; __pyx_t_13 = -1; if (__pyx_t_12 < 0) { __pyx_t_12 += __pyx_v_data.shape[0]; if (unlikely(__pyx_t_12 < 0)) __pyx_t_13 = 0; } else if (unlikely(__pyx_t_12 >= __pyx_v_data.shape[0])) __pyx_t_13 = 0; if (unlikely(__pyx_t_13 != -1)) { __Pyx_RaiseBufferIndexError(__pyx_t_13); __PYX_ERR(0, 38, __pyx_L1_error) } __pyx_t_14 = __pyx_v_pos; __pyx_t_13 = -1; if (__pyx_t_14 < 0) { __pyx_t_14 += __pyx_v_data.shape[0]; if (unlikely(__pyx_t_14 < 0)) __pyx_t_13 = 0; } else if (unlikely(__pyx_t_14 >= __pyx_v_data.shape[0])) __pyx_t_13 = 0; if (unlikely(__pyx_t_13 != -1)) { __Pyx_RaiseBufferIndexError(__pyx_t_13); __PYX_ERR(0, 38, __pyx_L1_error) } __pyx_t_15 = __pyx_v_i1; __pyx_t_13 = -1; if (__pyx_t_15 < 0) { __pyx_t_15 += __pyx_v_data.shape[0]; if (unlikely(__pyx_t_15 < 0)) __pyx_t_13 = 0; } else if (unlikely(__pyx_t_15 >= __pyx_v_data.shape[0])) __pyx_t_13 = 0; if (unlikely(__pyx_t_13 != -1)) { __Pyx_RaiseBufferIndexError(__pyx_t_13); __PYX_ERR(0, 38, __pyx_L1_error) } __pyx_t_16 = __pyx_v_i2; __pyx_t_13 = -1; if (__pyx_t_16 < 0) { __pyx_t_16 += __pyx_v_data.shape[0]; if (unlikely(__pyx_t_16 < 0)) __pyx_t_13 = 0; } else if (unlikely(__pyx_t_16 >= __pyx_v_data.shape[0])) __pyx_t_13 = 0; if (unlikely(__pyx_t_13 != -1)) { __Pyx_RaiseBufferIndexError(__pyx_t_13); __PYX_ERR(0, 38, __pyx_L1_error) } __pyx_t_17 = __pyx_v_fi; __pyx_t_13 = -1; if (__pyx_t_17 < 0) { __pyx_t_17 += __pyx_v_out.shape[0]; if (unlikely(__pyx_t_17 < 0)) __pyx_t_13 = 0; } else if (unlikely(__pyx_t_17 >= __pyx_v_out.shape[0])) __pyx_t_13 = 0; if (unlikely(__pyx_t_13 != -1)) { __Pyx_RaiseBufferIndexError(__pyx_t_13); __PYX_ERR(0, 38, __pyx_L1_error) } *((double *) ( /* dim=0 */ (__pyx_v_out.data + __pyx_t_17 * __pyx_v_out.strides[0]) )) = __pyx_v_get_sample(__pyx_v_x, (*((double *) ( /* dim=0 */ (__pyx_v_data.data + __pyx_t_12 * __pyx_v_data.strides[0]) ))), (*((double *) ( /* dim=0 */ (__pyx_v_data.data + __pyx_t_14 * __pyx_v_data.strides[0]) ))), (*((double *) ( /* dim=0 */ (__pyx_v_data.data + __pyx_t_15 * __pyx_v_data.strides[0]) ))), (*((double *) ( /* dim=0 */ (__pyx_v_data.data + __pyx_t_16 * __pyx_v_data.strides[0]) )))); }
39:
+40: return out
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41:
42: @cython.boundscheck(False)
43: @cython.wraparound(False)
+44: cdef public double[:] _linear_inner(double[:] data, double[:] out, int length) nogil:
__Pyx_memviewslice __pyx_f_5pippi_13interpolation__linear_inner(__Pyx_memviewslice __pyx_v_data, __Pyx_memviewslice __pyx_v_out, int __pyx_v_length) { Py_ssize_t __pyx_v_i; int __pyx_v_inputlength; __Pyx_memviewslice __pyx_r = { 0, 0, { 0 }, { 0 }, { 0 } }; /* … */ /* function exit code */ __pyx_L1_error:; __pyx_r.data = NULL; __pyx_r.memview = NULL; { #ifdef WITH_THREAD PyGILState_STATE __pyx_gilstate_save = __Pyx_PyGILState_Ensure(); #endif __Pyx_AddTraceback("pippi.interpolation._linear_inner", __pyx_clineno, __pyx_lineno, __pyx_filename); #ifdef WITH_THREAD __Pyx_PyGILState_Release(__pyx_gilstate_save); #endif } goto __pyx_L2; __pyx_L0:; if (unlikely(!__pyx_r.memview)) { PyErr_SetString(PyExc_TypeError, "Memoryview return value is not initialized"); } __pyx_L2:; return __pyx_r; }
45: cdef Py_ssize_t i
+46: cdef int inputlength = len(data)
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+48: if inputlength <= 1:
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+49: return out
__PYX_INC_MEMVIEW(&__pyx_v_out, 1); __pyx_r = __pyx_v_out; goto __pyx_L0;
50:
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+52: out[i] = _linear_point(data, <double>i/(length-1))
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55:
56: @cython.boundscheck(False)
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+58: cdef public double[:] _linear(double[:] data, int length):
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61:
62: @cython.boundscheck(False)
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