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/* -*- c++ -*- */
/*
* Copyright 2006 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.
*/
#ifndef INCLUDED_GR_STREAM_MUX_H
#define INCLUDED_GR_STREAM_MUX_H
#include <gr_core_api.h>
#include <gr_block.h>
#include <vector>
/*!
* \brief Creates a stream muxing block to multiplex many streams into
* one with a specified format.
* \ingroup converter_blk
*
* \param itemsize the item size of the stream
* \param length a vector (list/tuple) specifying the number of
* items from each stream the mux together.
* Warning: this requires that at least as many items
* per stream are available or the system will wait
* indefinitely for the items.
*
*/
class gr_stream_mux;
typedef boost::shared_ptr<gr_stream_mux> gr_stream_mux_sptr;
GR_CORE_API gr_stream_mux_sptr
gr_make_stream_mux (size_t itemsize, const std::vector<int> &lengths);
/*!
* \brief Stream muxing block to multiplex many streams into
* one with a specified format.
*
* Muxes N streams together producing an output stream that
* contains N0 items from the first stream, N1 items from the second,
* etc. and repeats:
*
* [N0, N1, N2, ..., Nm, N0, N1, ...]
*/
class GR_CORE_API gr_stream_mux : public gr_block
{
friend GR_CORE_API gr_stream_mux_sptr
gr_make_stream_mux (size_t itemsize, const std::vector<int> &lengths);
protected:
gr_stream_mux (size_t itemsize, const std::vector<int> &lengths);
private:
size_t d_itemsize;
unsigned int d_stream; // index of currently selected stream
int d_residual; // number if items left to put into current stream
gr_vector_int d_lengths; // number if items to pack per stream
void increment_stream();
public:
~gr_stream_mux(void);
void forecast (int noutput_items, gr_vector_int &ninput_items_required);
int general_work(int noutput_items,
gr_vector_int &ninput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif
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