/* -*- c++ -*- */
/*
 * Copyright 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 "stream_to_tagged_stream_impl.h"
#include <gnuradio/io_signature.h>
#include <cstring>

namespace gr {
namespace blocks {

stream_to_tagged_stream::sptr
stream_to_tagged_stream::make(size_t itemsize,
                              unsigned int vlen,
                              unsigned packet_len,
                              const std::string& len_tag_key)
{
    return gnuradio::get_initial_sptr(
        new stream_to_tagged_stream_impl(itemsize, vlen, packet_len, len_tag_key));
}

stream_to_tagged_stream_impl::stream_to_tagged_stream_impl(size_t itemsize,
                                                           unsigned int vlen,
                                                           unsigned packet_len,
                                                           const std::string& len_tag_key)
    : gr::sync_block("stream_to_tagged_stream",
                     gr::io_signature::make(1, 1, itemsize * vlen),
                     gr::io_signature::make(1, 1, itemsize * vlen)),
      d_itemsize(itemsize * vlen),
      d_packet_len(packet_len),
      d_packet_len_pmt(pmt::from_long(packet_len)),
      d_len_tag_key(pmt::string_to_symbol(len_tag_key)),
      d_next_tag_pos(0)
{
}

stream_to_tagged_stream_impl::~stream_to_tagged_stream_impl() {}

void stream_to_tagged_stream_impl::set_packet_len(unsigned packet_len)
{
    gr::thread::scoped_lock guard(d_setlock);
    d_packet_len = packet_len;
}
void stream_to_tagged_stream_impl::set_packet_len_pmt(unsigned packet_len)
{
    gr::thread::scoped_lock guard(d_setlock);
    d_packet_len_pmt = pmt::from_long(packet_len);
}
int stream_to_tagged_stream_impl::work(int noutput_items,
                                       gr_vector_const_void_star& input_items,
                                       gr_vector_void_star& output_items)
{
    gr::thread::scoped_lock guard(d_setlock);
    const unsigned char* in = (const unsigned char*)input_items[0];
    unsigned char* out = (unsigned char*)output_items[0];
    // Copy data
    memcpy(out, in, noutput_items * d_itemsize);
    // Add tags every d_packet_len
    while (d_next_tag_pos < nitems_written(0) + noutput_items) {
        add_item_tag(0, d_next_tag_pos, d_len_tag_key, d_packet_len_pmt);
        d_next_tag_pos += d_packet_len;
    }

    return noutput_items;
}

bool stream_to_tagged_stream_impl::start()
{
    d_next_tag_pos = 0;
    return true;
}

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