/* -*- c++ -*- */
/*
- * Copyright 2004 Free Software Foundation, Inc.
+ * Copyright 2004,2007,2008 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
#include "config.h"
#endif
-#include <gr_fft_vcc.h>
+#include <gr_fft_vcc.h> // abstract class
+#include <gr_fft_vcc_fftw.h> // concrete class
#include <gr_io_signature.h>
#include <gri_fft.h>
#include <math.h>
+#include <string.h>
gr_fft_vcc_sptr
-gr_make_fft_vcc (int fft_size, bool forward,const std::vector<float> window)
+gr_make_fft_vcc (int fft_size, bool forward,const std::vector<float> &window, bool shift)
{
- return gr_fft_vcc_sptr (new gr_fft_vcc (fft_size, forward, window));
+ return gr_make_fft_vcc_fftw(fft_size, forward, window, shift);
}
-gr_fft_vcc::gr_fft_vcc (int fft_size, bool forward, const std::vector<float> window)
- : gr_sync_block ("fft_vcc",
+gr_fft_vcc::gr_fft_vcc (const std::string &name,
+ int fft_size, bool forward, const std::vector<float> &window,
+ bool shift)
+ : gr_sync_block (name,
gr_make_io_signature (1, 1, fft_size * sizeof (gr_complex)),
gr_make_io_signature (1, 1, fft_size * sizeof (gr_complex))),
- d_fft_size(fft_size)
+ d_fft_size(fft_size), d_forward(forward), d_shift(shift)
{
- d_fft = new gri_fft_complex (d_fft_size, forward);
-
set_window(window);
-
}
gr_fft_vcc::~gr_fft_vcc ()
{
- delete d_fft;
-}
-
-int
-gr_fft_vcc::work (int noutput_items,
- gr_vector_const_void_star &input_items,
- gr_vector_void_star &output_items)
-{
- const gr_complex *in = (const gr_complex *) input_items[0];
- gr_complex *out = (gr_complex *) output_items[0];
-
- unsigned int input_data_size = input_signature()->sizeof_stream_item (0);
- unsigned int output_data_size = output_signature()->sizeof_stream_item (0);
-
- int count = 0;
-
- while (count++ < noutput_items){
-
- // copy input into optimally aligned buffer
-
- if (d_window.size()){
- gr_complex *dst = d_fft->get_inbuf();
- for (unsigned int i = 0; i < d_fft_size; i++) // apply window
- dst[i] = in[i] * d_window[i];
- }
- else
- memcpy (d_fft->get_inbuf(), in, input_data_size);
-
- // compute the fft
- d_fft->execute ();
-
- // cpoy result to our output
- memcpy (out, d_fft->get_outbuf (), output_data_size);
-
- in += d_fft_size;
- out += d_fft_size;
- }
-
- return noutput_items;
}
bool
-gr_fft_vcc::set_window(const std::vector<float> window)
+gr_fft_vcc::set_window(const std::vector<float> &window)
{
if(window.size()==0 || window.size()==d_fft_size) {
d_window=window;