diff options
Diffstat (limited to 'gr-fft/lib/fft_vcc_fftw.cc')
-rw-r--r-- | gr-fft/lib/fft_vcc_fftw.cc | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/gr-fft/lib/fft_vcc_fftw.cc b/gr-fft/lib/fft_vcc_fftw.cc deleted file mode 100644 index 076d7a63fd..0000000000 --- a/gr-fft/lib/fft_vcc_fftw.cc +++ /dev/null @@ -1,125 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2004,2007,2008,2010,2012 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * SPDX-License-Identifier: GPL-3.0-or-later - * - */ - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include "fft_vcc_fftw.h" -#include <math.h> -#include <string.h> -#include <volk/volk.h> - -namespace gr { -namespace fft { - -fft_vcc::sptr fft_vcc::make(int fft_size, - bool forward, - const std::vector<float>& window, - bool shift, - int nthreads) -{ - return gnuradio::make_block_sptr<fft_vcc_fftw>( - fft_size, forward, window, shift, nthreads); -} - -fft_vcc_fftw::fft_vcc_fftw(int fft_size, - bool forward, - const std::vector<float>& window, - bool shift, - int nthreads) - : sync_block("fft_vcc_fftw", - io_signature::make(1, 1, fft_size * sizeof(gr_complex)), - io_signature::make(1, 1, fft_size * sizeof(gr_complex))), - d_fft_size(fft_size), - d_forward(forward), - d_fft(fft_size, forward, nthreads), - d_shift(shift) -{ - if (!set_window(window)) - throw std::runtime_error("fft_vcc: window not the same length as fft_size"); -} - -void fft_vcc_fftw::set_nthreads(int n) { d_fft.set_nthreads(n); } - -int fft_vcc_fftw::nthreads() const { return d_fft.nthreads(); } - -bool fft_vcc_fftw::set_window(const std::vector<float>& window) -{ - if (window.empty() || window.size() == d_fft_size) { - d_window = window; - return true; - } else - return false; -} - -int fft_vcc_fftw::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.empty()) { - gr_complex* dst = d_fft.get_inbuf(); - if (!d_forward && d_shift) { - unsigned int offset = d_fft_size / 2; - int fft_m_offset = d_fft_size - offset; - volk_32fc_32f_multiply_32fc( - &dst[fft_m_offset], &in[0], &d_window[0], offset); - volk_32fc_32f_multiply_32fc( - &dst[0], &in[offset], &d_window[offset], d_fft_size - offset); - } else { - volk_32fc_32f_multiply_32fc(&dst[0], in, &d_window[0], d_fft_size); - } - } else { - if (!d_forward && d_shift) { // apply an ifft shift on the data - gr_complex* dst = d_fft.get_inbuf(); - unsigned int len = (unsigned int)(floor( - d_fft_size / 2.0)); // half length of complex array - memcpy(&dst[0], &in[len], sizeof(gr_complex) * (d_fft_size - len)); - memcpy(&dst[d_fft_size - len], &in[0], sizeof(gr_complex) * len); - } else { - memcpy(d_fft.get_inbuf(), in, input_data_size); - } - } - - // compute the fft - d_fft.execute(); - - // copy result to our output - if (d_forward && d_shift) { // apply a fft shift on the data - unsigned int len = (unsigned int)(ceil(d_fft_size / 2.0)); - memcpy(&out[0], - &d_fft.get_outbuf()[len], - sizeof(gr_complex) * (d_fft_size - len)); - memcpy( - &out[d_fft_size - len], &d_fft.get_outbuf()[0], sizeof(gr_complex) * len); - } else { - memcpy(out, d_fft.get_outbuf(), output_data_size); - } - - in += d_fft_size; - out += d_fft_size; - } - - return noutput_items; -} - -} /* namespace fft */ -} /* namespace gr */ |