sdrangel/wdsp/delay.hpp

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2.6 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 <QRecursiveMutex>
#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
double* in; // input buffer
double* out; // output buffer
int rate; // samplerate
double tdelta; // delay increment required (seconds)
double tdelay; // delay requested (seconds)
int L; // interpolation factor
int ncoef; // number of coefficients
int cpp; // coefficients per phase
double ft; // normalized cutoff frequency
double* 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
double* ring; // ring buffer
double adelta; // actual delay increment
double adelay; // actual delay
QRecursiveMutex cs_update;
static DELAY* create_delay (int run, int size, double* in, double* out, int rate, double tdelta, double tdelay);
static void destroy_delay (DELAY *a);
static void flush_delay (DELAY *a);
static void xdelay (DELAY *a);
// Properties
static void SetDelayRun (DELAY *a, int run);
static double SetDelayValue (DELAY *a, double delay); // returns actual delay in seconds
static void SetDelayBuffs (DELAY *a, int size, double* in, double* out);
};
} // namespace WDSP
#endif