/* -*- 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_raw_impl.h"
#include <gr_io_signature.h>
#include <string.h>
#include <iostream>
#include <iomanip>
#include <stdexcept>

using namespace pmt;

namespace gr {
  namespace blocks {

    annotator_raw::sptr
    annotator_raw::make(size_t sizeof_stream_item)
    {
      return gnuradio::get_initial_sptr
        (new annotator_raw_impl(sizeof_stream_item));
    }

    annotator_raw_impl::annotator_raw_impl(size_t sizeof_stream_item)
      : gr_sync_block("annotator_raw",
                      gr_make_io_signature(1, 1, sizeof_stream_item),
                      gr_make_io_signature(1, 1, sizeof_stream_item)),
        d_itemsize(sizeof_stream_item)
    {
      set_tag_propagation_policy(TPP_ONE_TO_ONE);
      set_relative_rate(1.0);
    }

    annotator_raw_impl::~annotator_raw_impl()
    {
    }

    void
    annotator_raw_impl::add_tag(uint64_t offset, pmt_t key, pmt_t val)
    {
      gruel::scoped_lock l(d_mutex);

      gr_tag_t tag;
      tag.srcid = pmt::intern(name());
      tag.key = key;
      tag.value = val;
      tag.offset = offset;

      // add our new tag
      d_queued_tags.push_back(tag);
      // make sure our tags are in offset order
      std::sort(d_queued_tags.begin(), d_queued_tags.end(),
                gr_tag_t::offset_compare);
      // make sure we are not adding an item in the past!
      if(tag.offset > nitems_read(0)) {
        throw std::runtime_error("annotator_raw::add_tag: item added too far in the past\n.");
      }
    }

    int
    annotator_raw_impl::work(int noutput_items,
                             gr_vector_const_void_star &input_items,
                             gr_vector_void_star &output_items)
    {
      gruel::scoped_lock l(d_mutex);

      const char *in = (const char*)input_items[0];
      char *out = (char*)output_items[0];

      uint64_t start_N = nitems_read(0);
      uint64_t end_N = start_N + (uint64_t)(noutput_items);
   
      // locate queued tags that fall in this range and insert them when appropriate
      std::vector<gr_tag_t>::iterator i = d_queued_tags.begin();
      while( i != d_queued_tags.end() ) {
        if( (*i).offset >= start_N && (*i).offset < end_N) {
          add_item_tag(0, (*i).offset,(*i).key, (*i).value, (*i).srcid);
          i = d_queued_tags.erase(i);
        } 
        else {
          break;
        }
      }

      // copy data across
      memcpy(out, in, noutput_items*d_itemsize);
      return noutput_items;
    }

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