diff options
| author | Johnathan Corgan <johnathan@corganlabs.com> | 2013-03-15 09:57:31 -0700 |
|---|---|---|
| committer | Johnathan Corgan <johnathan@corganlabs.com> | 2013-03-15 09:57:31 -0700 |
| commit | e965a5bb209ad46a509ccd21f393667fd69d95f9 (patch) | |
| tree | 40d683ef8f80980f12eac6cfe7f3423c49b45f87 /gr-digital/lib/ts_insert_zeros_cc_impl.cc | |
| parent | 2bf9c4cb4b0b426690f353fc1662a13e70c0d5e0 (diff) | |
| parent | 27990ca9e236931e39a830e48f0a1efe13ec085f (diff) | |
Merge branch 'ofdm-master' into ofdm-next
Added fixups for next branch changes
Conflicts:
CMakeLists.txt
gnuradio-core/src/lib/io/gr_message_sink.cc
gnuradio-core/src/lib/io/gr_message_sink.h
gnuradio-core/src/lib/io/gr_message_sink.i
gnuradio-core/src/lib/io/gr_message_source.cc
gnuradio-core/src/lib/io/gr_message_source.h
gnuradio-core/src/lib/io/gr_message_source.i
gr-blocks/CMakeLists.txt
gr-digital/CMakeLists.txt
gr-digital/grc/digital_block_tree.xml
gr-digital/include/digital/CMakeLists.txt
gr-digital/include/digital_ofdm_cyclic_prefixer.h
gr-digital/lib/CMakeLists.txt
gr-digital/lib/digital_ofdm_cyclic_prefixer.cc
gr-digital/lib/ofdm_cyclic_prefixer_impl.h
gr-digital/python/CMakeLists.txt
gr-digital/swig/CMakeLists.txt
gr-digital/swig/digital_swig.i
Diffstat (limited to 'gr-digital/lib/ts_insert_zeros_cc_impl.cc')
| -rw-r--r-- | gr-digital/lib/ts_insert_zeros_cc_impl.cc | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/gr-digital/lib/ts_insert_zeros_cc_impl.cc b/gr-digital/lib/ts_insert_zeros_cc_impl.cc new file mode 100644 index 0000000000..1a78851c18 --- /dev/null +++ b/gr-digital/lib/ts_insert_zeros_cc_impl.cc @@ -0,0 +1,130 @@ +/* -*- c++ -*- */ +/* + * Copyright 2012 <+YOU OR YOUR COMPANY+>. + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * This software is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <gr_io_signature.h> +#include "ts_insert_zeros_cc_impl.h" +#include <iostream> +#include <vector> +#include <algorithm> +#include <string> +#include <sstream> + +namespace gr { + namespace digital { + + ts_insert_zeros_cc::sptr + ts_insert_zeros_cc::make(const std::string &lengthtagname) + { + return gnuradio::get_initial_sptr (new ts_insert_zeros_cc_impl(lengthtagname)); + } + + /* + * The private constructor + */ + ts_insert_zeros_cc_impl::ts_insert_zeros_cc_impl(const std::string &lengthtagname) + : gr_block("ts_insert_zeros_cc", + gr_make_io_signature(1, 1, sizeof(gr_complex)), + gr_make_io_signature(1, 1, sizeof(gr_complex))), + d_lengthtagname(lengthtagname) + { + } + + /* + * Our virtual destructor. + */ + ts_insert_zeros_cc_impl::~ts_insert_zeros_cc_impl() + { + } + + void + ts_insert_zeros_cc_impl::forecast(int noutput_items, gr_vector_int &ninput_items_required) + { + ninput_items_required[0] = 0; + } + + int + ts_insert_zeros_cc_impl::general_work ( + int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items + ) + { + gr_complex *out = (gr_complex *) output_items[0]; + const gr_complex*in = (const gr_complex*) input_items[0]; + + if (ninput_items[0]) { + // Check if we have an entire packet. + long packet_length = 0; + std::vector<gr_tag_t> tags; + // Get any tags associated with the first item on the input. + this->get_tags_in_range(tags, 0, nitems_read(0), nitems_read(0)+1); + for (unsigned int j = 0; j < tags.size(); j++) { + if (pmt::symbol_to_string(tags[j].key) == d_lengthtagname) { + packet_length = pmt::to_long(tags[j].value); + } + } + if (!packet_length) { + throw std::runtime_error("no tag"); + } + if (ninput_items[0] < packet_length ) { + // We don't have enough input to produce a packet. + // Produces zeros instead. + } else { + // We have enough input. + if (noutput_items < packet_length) { + // But we don't have enough output space. + // We don't want to produce zeros, so return. + set_output_multiple(packet_length); + return 0; + } else { + // And we have enough output space. + // Produce the packet. + std::vector<gr_tag_t> tags; + this->get_tags_in_range(tags, 0, nitems_read(0), nitems_read(0)+packet_length); + for (unsigned int j = 0; j < tags.size(); j++) { + const uint64_t offset = tags[j].offset - nitems_read(0) + nitems_written(0); + this->add_item_tag(0, offset, tags[j].key, tags[j].value); + } + if (noutput_items < packet_length) { + throw std::runtime_error("Not enough room in the output buffer."); + } + memcpy(out, in, packet_length*sizeof(gr_complex)); + consume(0, packet_length); + return packet_length; + } + } + } + // We're just producing zeros. + // Either we have no input data, or not an entire packet yet. + for (int i=0; i<noutput_items; i++) { + out[i] = 0; + } + return noutput_items; + } + + + } /* namespace digital */ +} /* namespace gr */ + |