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/*
Copyright (C) 2007, 2008, 2009, 2010, 2011 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
Written by
2012, Matthias P. Braendli, matthias.braendli@mpb.li
*/
/*
This file is part of CRC-DADMOD.
CRC-DADMOD 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.
CRC-DADMOD 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 CRC-DADMOD. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef FIRFILTER_H
#define FIRFILTER_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <boost/thread.hpp>
#include <queue>
#include "RemoteControl.h"
#include "ModCodec.h"
#include "PcDebug.h"
#include <sys/types.h>
#include <complex>
#include <time.h>
#include <cstdio>
#include <string>
#define FIRFILTER_PIPELINE_DELAY 1
typedef std::complex<float> complexf;
template<typename T>
class ThreadsafeQueue
{
private:
std::queue<T> the_queue;
mutable boost::mutex the_mutex;
boost::condition_variable the_condition_variable;
public:
void push(T const& val)
{
boost::mutex::scoped_lock lock(the_mutex);
the_queue.push(val);
lock.unlock();
the_condition_variable.notify_one();
}
bool empty() const
{
boost::mutex::scoped_lock lock(the_mutex);
return the_queue.empty();
}
bool try_pop(T& popped_value)
{
boost::mutex::scoped_lock lock(the_mutex);
if(the_queue.empty())
{
return false;
}
popped_value = the_queue.front();
the_queue.pop();
return true;
}
void wait_and_pop(T& popped_value)
{
boost::mutex::scoped_lock lock(the_mutex);
while(the_queue.empty())
{
the_condition_variable.wait(lock);
}
popped_value = the_queue.front();
the_queue.pop();
}
};
struct FIRFilterWorkerData {
/* Thread-safe queues to give data to and get data from
* the worker
*/
ThreadsafeQueue<Buffer*> input_queue;
ThreadsafeQueue<Buffer*> output_queue;
/* Remote-control can change the taps while the filter
* runs. This lock makes sure nothing bad happens when
* the taps are being modified
*/
mutable boost::mutex taps_mutex;
float* taps;
int n_taps;
};
class FIRFilterWorker {
public:
FIRFilterWorker () {
running = false;
calculationTime = 0;
}
~FIRFilterWorker() {
PDEBUG("~FIRFilterWorker: Total elapsed thread time filtering: %zu\n", calculationTime);
}
void start(struct FIRFilterWorkerData *firworkerdata) {
running = true;
fir_thread = boost::thread(&FIRFilterWorker::process, this, firworkerdata);
}
void stop() {
running = false;
fir_thread.interrupt();
fir_thread.join();
}
void process(struct FIRFilterWorkerData *fwd);
private:
time_t calculationTime;
struct FIRFilterWorkerData *workerdata;
bool running;
boost::thread fir_thread;
};
class FIRFilter : public ModCodec, public RemoteControllable
{
public:
FIRFilter(std::string taps_file);
virtual ~FIRFilter();
FIRFilter(const FIRFilter&);
FIRFilter& operator=(const FIRFilter&);
int process(Buffer* const dataIn, Buffer* dataOut);
const char* name() { return "FIRFilter"; }
/******* REMOTE CONTROL ********/
void set_parameter(string parameter, string value);
string get_parameter(string parameter);
protected:
void load_filter_taps();
std::string myTapsFile;
int myNtaps;
float* myFilter;
FIRFilterWorker worker;
int number_of_runs;
struct FIRFilterWorkerData firwd;
};
#endif //FIRFILTER_H
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