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80 lines
2.5 KiB
C++
80 lines
2.5 KiB
C++
/* delay.h
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2013, 2019 Warren Pratt, NR0V
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Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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The author can be reached by email at
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warren@wpratt.com
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*/
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#ifndef wdsp_delay_h
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#define wdsp_delay_h
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#include <QRecursiveMutex>
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#include "export.h"
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#define WSDEL 1025 // number of supported whole sample delays
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namespace WDSP {
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class WDSP_API DELAY
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{
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public:
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int run; // run
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int size; // number of input samples per buffer
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float* in; // input buffer
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float* out; // output buffer
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int rate; // samplerate
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float tdelta; // delay increment required (seconds)
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float tdelay; // delay requested (seconds)
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int L; // interpolation factor
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int ncoef; // number of coefficients
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int cpp; // coefficients per phase
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float ft; // normalized cutoff frequency
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float* h; // coefficients
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int snum; // starting sample number (0 for sub-sample delay)
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int phnum; // phase number
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int idx_in; // index for input into ring
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int rsize; // ring size in complex samples
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float* ring; // ring buffer
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float adelta; // actual delay increment
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float adelay; // actual delay
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QRecursiveMutex cs_update;
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static DELAY* create_delay (int run, int size, float* in, float* out, int rate, float tdelta, float tdelay);
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static void destroy_delay (DELAY *a);
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static void flush_delay (DELAY *a);
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static void xdelay (DELAY *a);
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// Properties
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static void SetDelayRun (DELAY *a, int run);
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static float SetDelayValue (DELAY *a, float delay); // returns actual delay in seconds
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static void SetDelayBuffs (DELAY *a, int size, float* in, float* out);
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};
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} // namespace WDSP
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#endif
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