GNU Radio 3.7.2 C++ API
volk_complex.h
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1 #ifndef INCLUDE_VOLK_COMPLEX_H
2 #define INCLUDE_VOLK_COMPLEX_H
3 
4 /*!
5  * \brief Provide typedefs and operators for all complex types in C and C++.
6  *
7  * The typedefs encompass all signed integer and floating point types.
8  * Each operator function is intended to work across all data types.
9  * Under C++, these operators are defined as inline templates.
10  * Under C, these operators are defined as preprocessor macros.
11  * The use of macros makes the operators agnostic to the type.
12  *
13  * The following operator functions are defined:
14  * - lv_cmake - make a complex type from components
15  * - lv_creal - get the real part of the complex number
16  * - lv_cimag - get the imaginary part of the complex number
17  * - lv_conj - take the conjugate of the complex number
18  */
19 
20 #ifdef __cplusplus
21 
22 #include <complex>
23 #include <stdint.h>
24 
25 typedef std::complex<int8_t> lv_8sc_t;
26 typedef std::complex<int16_t> lv_16sc_t;
27 typedef std::complex<int32_t> lv_32sc_t;
28 typedef std::complex<int64_t> lv_64sc_t;
29 typedef std::complex<float> lv_32fc_t;
30 typedef std::complex<double> lv_64fc_t;
31 
32 template <typename T> inline std::complex<T> lv_cmake(const T &r, const T &i){
33  return std::complex<T>(r, i);
34 }
35 
36 template <typename T> inline typename T::value_type lv_creal(const T &x){
37  return x.real();
38 }
39 
40 template <typename T> inline typename T::value_type lv_cimag(const T &x){
41  return x.imag();
42 }
43 
44 template <typename T> inline T lv_conj(const T &x){
45  return std::conj(x);
46 }
47 
48 #else /* __cplusplus */
49 
50 #include <complex.h>
51 
52 typedef char complex lv_8sc_t;
53 typedef short complex lv_16sc_t;
54 typedef long complex lv_32sc_t;
55 typedef long long complex lv_64sc_t;
56 typedef float complex lv_32fc_t;
57 typedef double complex lv_64fc_t;
58 
59 #define lv_cmake(r, i) ((r) + _Complex_I*(i))
60 
61 // When GNUC is available, use the complex extensions.
62 // The extensions always return the correct value type.
63 // http://gcc.gnu.org/onlinedocs/gcc/Complex.html
64 #ifdef __GNUC__
65 
66 #define lv_creal(x) (__real__(x))
67 
68 #define lv_cimag(x) (__imag__(x))
69 
70 #define lv_conj(x) (~(x))
71 
72 // When not available, use the c99 complex function family,
73 // which always returns double regardless of the input type.
74 #else /* __GNUC__ */
75 
76 #define lv_creal(x) (creal(x))
77 
78 #define lv_cimag(x) (cimag(x))
79 
80 #define lv_conj(x) (conj(x))
81 
82 #endif /* __GNUC__ */
83 
84 #endif /* __cplusplus */
85 
86 #endif /* INCLUDE_VOLK_COMPLEX_H */
long long complex lv_64sc_t
Definition: volk_complex.h:55
short complex lv_16sc_t
Definition: volk_complex.h:53
#define lv_conj(x)
Definition: volk_complex.h:80
#define lv_cmake(r, i)
Definition: volk_complex.h:59
long complex lv_32sc_t
Definition: volk_complex.h:54
double complex lv_64fc_t
Definition: volk_complex.h:57
float complex lv_32fc_t
Definition: volk_complex.h:56
#define lv_creal(x)
Definition: volk_complex.h:76
char complex lv_8sc_t
Provide typedefs and operators for all complex types in C and C++.
Definition: volk_complex.h:52
#define lv_cimag(x)
Definition: volk_complex.h:78