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/*
Copyright (C) 2007, 2008, 2009, 2010, 2011 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
Copyright (C) 2018
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 "RemoteControl.h"
#include "ModPlugin.h"
#include "PcDebug.h"
#include "ThreadsafeQueue.h"
#include <sys/types.h>
#include <array>
#include <complex>
#include <memory>
#include <string>
#include <thread>
#include <vector>
#include <ctime>
#include <cstdio>
#define MEMLESSPOLY_PIPELINE_DELAY 1
typedef std::complex<float> complexf;
enum class dpd_type_t {
odd_only_poly,
lookup_table
};
class MemlessPoly : public PipelinedModCodec, public RemoteControllable
{
public:
MemlessPoly(std::string& coefs_file, unsigned int num_threads);
MemlessPoly(const MemlessPoly& other) = delete;
MemlessPoly& operator=(const MemlessPoly& other) = delete;
virtual ~MemlessPoly();
virtual const char* name() { return "MemlessPoly"; }
/******* 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;
private:
int internal_process(Buffer* const dataIn, Buffer* dataOut);
void load_coefficients(std::istream& coefData);
std::string serialise_coefficients() const;
struct worker_t {
struct input_data_t {
dpd_type_t dpd_type;
// Valid for polynomial types
const float *coefs_am = nullptr;
const float *coefs_pm = nullptr;
// Valid for LUT
float lut_scalefactor = 0.0f;
const complexf *lut = nullptr;
const complexf *in = nullptr;
size_t start = 0;
size_t stop = 0;
complexf *out = nullptr;
};
worker_t() {}
worker_t(const worker_t& other) = delete;
worker_t operator=(const worker_t& other) = delete;
worker_t operator=(worker_t&& other) = delete;
// The move constructor creates a new in_queue and out_queue,
// because ThreadsafeQueue is neither copy- nor move-constructible.
// Not an issue because creating the workers happens at startup, before
// the first work item.
worker_t(worker_t&& other) :
in_queue(),
out_queue(),
thread(std::move(other.thread)) {}
~worker_t() {
if (thread.joinable()) {
in_queue.trigger_wakeup();
thread.join();
}
}
ThreadsafeQueue<input_data_t> in_queue;
ThreadsafeQueue<int> out_queue;
std::thread thread;
};
std::vector<worker_t> m_workers;
static void worker_thread(worker_t *workerdata);
bool m_dpd_settings_valid = false;
dpd_type_t m_dpd_type;
std::vector<float> m_coefs_am; // AM/AM coefficients
std::vector<float> m_coefs_pm; // AM/PM coefficients
float m_lut_scalefactor; // Scale value applied before looking up in LUT
static constexpr size_t lut_entries = 32;
std::array<complexf, lut_entries> m_lut; // Lookup table correction factors
std::string& m_coefs_file;
mutable std::mutex m_coefs_mutex;
};
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