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/*
Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Her Majesty
the Queen in Right of Canada (Communications Research Center Canada)
Copyright (C) 2017
Matthias P. Braendli, matthias.braendli@mpb.li
http://opendigitalradio.org
*/
/*
This file is part of ODR-DabMod.
ODR-DabMod 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 of the
License, or (at your option) any later version.
ODR-DabMod 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 ODR-DabMod. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "ModPlugin.h"
#include "RemoteControl.h"
#include <stdint.h>
#include <vector>
/* The GuardIntervalInserter prepends the cyclic prefix to all
* symbols in the transmission frame.
*
* If windowOverlap is non-zero, it will also add a cyclic suffix of
* that length, enlarge the cyclic prefix too, and make symbols
* overlap using a raised cosine window.
* */
class GuardIntervalInserter : public ModCodec, public RemoteControllable
{
public:
GuardIntervalInserter(
size_t nbSymbols,
size_t spacing,
size_t nullSize,
size_t symSize,
size_t windowOverlap = 0);
int process(Buffer* const dataIn, Buffer* dataOut);
const char* name() { return "GuardIntervalInserter"; }
/******* REMOTE CONTROL ********/
virtual void set_parameter(const std::string& parameter,
const std::string& value);
virtual const std::string get_parameter(
const std::string& parameter) const;
protected:
void update_window(size_t new_window_overlap);
size_t d_nbSymbols;
size_t d_spacing;
size_t d_nullSize;
size_t d_symSize;
mutable std::mutex d_windowMutex;
size_t d_windowOverlap;
std::vector<float> d_window;
};
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