GNU Radio C++ API Reference  g90d26cb
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fxpt_vco.h
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1 /* -*- c++ -*- */
2 /*
3  * Copyright 2002,2004,2005,2013 Free Software Foundation, Inc.
4  *
5  * This file is part of GNU Radio
6  *
7  * SPDX-License-Identifier: GPL-3.0-or-later
8  *
9  */
10 
11 #ifndef INCLUDED_GR_FXPT_VCO_H
12 #define INCLUDED_GR_FXPT_VCO_H
13 
14 #include <gnuradio/api.h>
15 #include <gnuradio/fxpt.h>
16 #include <gnuradio/gr_complex.h>
17 
18 namespace gr {
19 
20 /*!
21  * \brief Voltage Controlled Oscillator (VCO)
22  * \ingroup misc
23  */
24 class /*GR_RUNTIME_API*/ fxpt_vco
25 {
26  int32_t d_phase;
27 
28 public:
29  fxpt_vco() : d_phase(0) {}
30 
31  ~fxpt_vco() {}
32 
33  // radians
34  void set_phase(float angle) { d_phase = fxpt::float_to_fixed(angle); }
35 
36  void adjust_phase(float delta_phase)
37  {
38  d_phase += (uint32_t)fxpt::float_to_fixed(delta_phase);
39  }
40 
41  float get_phase() const { return fxpt::fixed_to_float(d_phase); }
42 
43  // compute sin and cos for current phase angle
44  void sincos(float* sinx, float* cosx) const
45  {
46  *sinx = fxpt::sin(d_phase);
47  *cosx = fxpt::cos(d_phase);
48  }
49 
50  // compute complex sine a block at a time
51  void sincos(gr_complex* output,
52  const float* input,
53  int noutput_items,
54  float k,
55  float ampl = 1.0)
56  {
57  for (int i = 0; i < noutput_items; i++) {
58  output[i] = gr_complex((float)(fxpt::cos(d_phase) * ampl),
59  (float)(fxpt::sin(d_phase) * ampl));
60  adjust_phase(input[i] * k);
61  }
62  }
63 
64  // compute a block at a time
65  void
66  cos(float* output, const float* input, int noutput_items, float k, float ampl = 1.0)
67  {
68  for (int i = 0; i < noutput_items; i++) {
69  output[i] = (float)(fxpt::cos(d_phase) * ampl);
70  adjust_phase(input[i] * k);
71  }
72  }
73 
74  // compute cos or sin for current phase angle
75  float cos() const { return fxpt::cos(d_phase); }
76  float sin() const { return fxpt::sin(d_phase); }
77 };
78 
79 } /* namespace gr */
80 
81 #endif /* INCLUDED_GR_FXPT_VCO_H */
Voltage Controlled Oscillator (VCO)
Definition: fxpt_vco.h:25
void sincos(gr_complex *output, const float *input, int noutput_items, float k, float ampl=1.0)
Definition: fxpt_vco.h:51
void cos(float *output, const float *input, int noutput_items, float k, float ampl=1.0)
Definition: fxpt_vco.h:66
fxpt_vco()
Definition: fxpt_vco.h:29
void set_phase(float angle)
Definition: fxpt_vco.h:34
float sin() const
Definition: fxpt_vco.h:76
~fxpt_vco()
Definition: fxpt_vco.h:31
void adjust_phase(float delta_phase)
Definition: fxpt_vco.h:36
float cos() const
Definition: fxpt_vco.h:75
void sincos(float *sinx, float *cosx) const
Definition: fxpt_vco.h:44
float get_phase() const
Definition: fxpt_vco.h:41
static float cos(int32_t x)
Definition: fxpt.h:65
static int32_t float_to_fixed(float x)
Definition: fxpt.h:41
static float sin(int32_t x)
Given a fixed point angle x, return float sine (x)
Definition: fxpt.h:55
static float fixed_to_float(int32_t x)
Definition: fxpt.h:50
std::complex< float > gr_complex
Definition: gr_complex.h:15
GNU Radio logging wrapper.
Definition: basic_block.h:29