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sdrangel/wdsp/delay.hpp
2024-08-10 06:40:35 +02:00

89 lines
2.5 KiB
C++

/* delay.h
This file is part of a program that implements a Software-Defined Radio.
Copyright (C) 2013, 2019 Warren Pratt, NR0V
Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
This program 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 2
of the License, or (at your option) any later version.
This program 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 program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
The author can be reached by email at
warren@wpratt.com
*/
#ifndef wdsp_delay_h
#define wdsp_delay_h
#include <vector>
#include "export.h"
#define WSDEL 1025 // number of supported whole sample delays
namespace WDSP {
class WDSP_API DELAY
{
public:
int run; // run
int size; // number of input samples per buffer
float* in; // input buffer
float* out; // output buffer
int rate; // samplerate
float tdelta; // delay increment required (seconds)
float tdelay; // delay requested (seconds)
int L; // interpolation factor
int ncoef; // number of coefficients
int cpp; // coefficients per phase
float ft; // normalized cutoff frequency
std::vector<float> h; // coefficients
int snum; // starting sample number (0 for sub-sample delay)
int phnum; // phase number
int idx_in; // index for input into ring
int rsize; // ring size in complex samples
std::vector<float> ring; // ring buffer
float adelta; // actual delay increment
float adelay; // actual delay
DELAY(
int run,
int size,
float* in,
float* out,
int rate,
float tdelta,
float tdelay
);
DELAY(const DELAY&) = delete;
DELAY& operator=(DELAY& other) = delete;
~DELAY() = default;
void flush();
void execute();
// Properties
void setRun(int run);
float setValue(float delay); // returns actual delay in seconds
void setBuffs(int size, float* in, float* out);
};
} // namespace WDSP
#endif