/* -*- c++ -*- */
/*
 * Copyright 2010,2013 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * GNU Radio 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.
 *
 * GNU Radio 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 GNU Radio; 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 "annotator_alltoall_impl.h"
#include <gr_io_signature.h>
#include <string.h>
#include <iostream>
#include <iomanip>

namespace gr {
  namespace blocks {

    annotator_alltoall::sptr
    annotator_alltoall::make(int when, size_t sizeof_stream_item)
    {
      return gnuradio::get_initial_sptr
        (new annotator_alltoall_impl(when, sizeof_stream_item));
    }

    annotator_alltoall_impl::annotator_alltoall_impl(int when,
                                                     size_t sizeof_stream_item)
      : gr_sync_block("annotator_alltoall",
                      gr_make_io_signature(1, -1, sizeof_stream_item),
                      gr_make_io_signature(1, -1, sizeof_stream_item)),
        d_itemsize(sizeof_stream_item), d_when((uint64_t)when)
    {
      set_tag_propagation_policy(TPP_ALL_TO_ALL);

      d_tag_counter = 0;
    }

    annotator_alltoall_impl::~annotator_alltoall_impl()
    {
    }

    int
    annotator_alltoall_impl::work(int noutput_items,
                                  gr_vector_const_void_star &input_items,
                                  gr_vector_void_star &output_items)
    {
      const float *in = (const float*)input_items[0];
      float *out = (float*)output_items[0];

      std::stringstream str;
      str << name() << unique_id();

      uint64_t abs_N = 0, end_N;
      int ninputs = input_items.size();
      for(int i = 0; i < ninputs; i++) {
        abs_N = nitems_read(i);
        end_N = abs_N + (uint64_t)(noutput_items);

        std::vector<gr_tag_t> all_tags;
        get_tags_in_range(all_tags, i, abs_N, end_N);

        std::vector<gr_tag_t>::iterator itr;
        for(itr = all_tags.begin(); itr != all_tags.end(); itr++) {
          d_stored_tags.push_back(*itr);
        }
      }

      // Source ID and key for any tag that might get applied from this block
      pmt::pmt_t srcid = pmt::pmt_string_to_symbol(str.str());
      pmt::pmt_t key = pmt::pmt_string_to_symbol("seq");

      // Work does nothing to the data stream; just copy all inputs to
      // outputs Adds a new tag when the number of items read is a
      // multiple of d_when
      abs_N = nitems_written(0);
      int noutputs = output_items.size();

      for(int j = 0; j < noutput_items; j++) {
        for(int i = 0; i < noutputs; i++) {
          if(abs_N % d_when == 0) {
            pmt::pmt_t value = pmt::pmt_from_uint64(d_tag_counter++);
            add_item_tag(i, abs_N, key, value, srcid);
          }

          // Sum all of the inputs together for each output. Just 'cause.
          out = (float*)output_items[i];
          out[j] = 0;
          for(int ins = 0; ins < ninputs; ins++) {
            in = (const float*)input_items[ins];
            out[j] += in[j];
          }
        }
        abs_N++;
      }

      return noutput_items;
    }

  } /* namespace blocks */
} /* namespace gr */