GNU Radio 3.5.3.2 C++ API
gr_pfb_synthesis_filterbank_ccf.h
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1 /* -*- c++ -*- */
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3  * Copyright 2010 Free Software Foundation, Inc.
4  *
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22 
23 
24 #ifndef INCLUDED_GR_PFB_SYNTHESIS_FILTERBANK_CCF_H
25 #define INCLUDED_GR_PFB_SYNTHESIS_FILTERBANK_CCF_H
26 
27 #include <gr_core_api.h>
28 #include <gr_sync_interpolator.h>
29 #include <gri_fir_filter_with_buffer_ccf.h>
30 
34  (unsigned int numchans, const std::vector<float> &taps);
35 
36 class gri_fft_complex;
37 
38 
39 /*!
40  * \class gr_pfb_synthesis_filterbank_ccf
41  *
42  * \brief Polyphase synthesis filterbank with
43  * gr_complex input, gr_complex output and float taps
44  *
45  * \ingroup filter_blk
46  * \ingroup pfb_blk
47  */
48 
50 {
51  private:
52  /*!
53  * Build the polyphase synthesis filterbank.
54  * \param numchans (unsigned integer) Specifies the number of
55  channels <EM>M</EM>
56  * \param taps (vector/list of floats) The prototype filter to
57  populate the filterbank.
58  */
60  (unsigned int numchans, const std::vector<float> &taps);
61 
62  bool d_updated;
63  unsigned int d_numchans;
64  unsigned int d_taps_per_filter;
65  gri_fft_complex *d_fft;
66  std::vector< gri_fir_filter_with_buffer_ccf*> d_filters;
67  std::vector< std::vector<float> > d_taps;
68 
69 
70  /*!
71  * Build the polyphase synthesis filterbank.
72  * \param numchans (unsigned integer) Specifies the number of
73  channels <EM>M</EM>
74  * \param taps (vector/list of floats) The prototype filter
75  to populate the filterbank.
76  */
77  gr_pfb_synthesis_filterbank_ccf (unsigned int numchans,
78  const std::vector<float> &taps);
79 
80 public:
82 
83  /*!
84  * Resets the filterbank's filter taps with the new prototype filter
85  * \param taps (vector/list of floats) The prototype filter to
86  populate the filterbank.
87  */
88  void set_taps (const std::vector<float> &taps);
89 
90  /*!
91  * Print all of the filterbank taps to screen.
92  */
93  void print_taps();
94 
95  int work (int noutput_items,
96  gr_vector_const_void_star &input_items,
97  gr_vector_void_star &output_items);
98 };
99 
100 #endif