sub_source.h

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/* -*- c++ -*- */
/*
 * Copyright 2013,2014 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio.
 *
 * 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.
 */

#ifndef INCLUDED_ZEROMQ_SUB_SOURCE_H
#define INCLUDED_ZEROMQ_SUB_SOURCE_H

#include <gnuradio/sync_block.h>
#include <gnuradio/zeromq/api.h>

namespace gr {
namespace zeromq {

/*!
 * \brief Receive messages on ZMQ SUB socket and source stream
 * \ingroup zeromq
 *
 * \details
 * This block will connect to a ZMQ PUB socket, then produce all
 * incoming messages as streaming output.
 */
class ZEROMQ_API sub_source : virtual public gr::sync_block
{
public:
    typedef boost::shared_ptr<sub_source> sptr;

    /*!
     * \brief Return a shared_ptr to a new instance of gr::zeromq::sub_source.
     *
     * \param itemsize Size of a stream item in bytes.
     * \param vlen Vector length of the input items. Note that one vector is one item.
     * \param address  ZMQ socket address specifier.
     * \param timeout  Receive timeout in milliseconds, default is 100ms, 1us increments.
     * \param pass_tags Whether source will look for and deserialize tags.
     * \param hwm High Watermark to configure the socket to (-1 => zmq's default)
     */
    static sptr make(size_t itemsize,
                     size_t vlen,
                     char* address,
                     int timeout = 100,
                     bool pass_tags = false,
                     int hwm = -1);

    /*!
     * \brief Return a std::string of ZMQ_LAST_ENDPOINT from the underlying ZMQ socket.
     */
    virtual std::string last_endpoint() = 0;
};

} // namespace zeromq
} // namespace gr

#endif /* INCLUDED_ZEROMQ_SUB_SOURCE_H */