/*	rnnr.h

This file is part of a program that implements a Software-Defined Radio.

This code/file can be found on GitHub : https://github.com/ramdor/Thetis

Copyright (C) 2000-2025 Original authors
Copyright (C) 2020-2025 Richard Samphire MW0LGE

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

mw0lge@grange-lane.co.uk

This code is based on code and ideas from  : https://github.com/vu3rdd/wdsp
and and uses RNNoise and libspecbleach
https://gitlab.xiph.org/xiph/rnnoise
https://github.com/lucianodato/libspecbleach

It uses a non modified version of rmnoise and implements a ringbuffer to handle input/output frame size differences.
*/
//
//============================================================================================//
// Dual-Licensing Statement (Applies Only to Author's Contributions, Richard Samphire MW0LGE) //
// ------------------------------------------------------------------------------------------ //
// For any code originally written by Richard Samphire MW0LGE, or for any modifications		  //
// made by him, the copyright holder for those portions (Richard Samphire) reserves the		  //
// right to use, license, and distribute such code under different terms, including			  //
// closed-source and proprietary licences, in addition to the GNU General Public License	  //
// granted above. Nothing in this statement restricts any rights granted to recipients under  //
// the GNU GPL. Code contributed by others (not Richard Samphire) remains licensed under	  //
// its original terms and is not affected by this dual-licensing statement in any way.		  //
// Richard Samphire can be reached by email at :  mw0lge@grange-lane.co.uk					  //
//============================================================================================//

#ifndef _rnnr_h
#define _rnnr_h

#include "rnnoise.h"

#define FRAME_SIZE

typedef struct _rnnr_ring_buffer {
	float* buf;
	int capacity;
	int head;
	int tail;
	int count;
} rnnr_ring_buffer;

typedef struct _rnnr
{
	int run;
	int run_old; // used when loading a new model
	int position;
	int frame_size;
	DenoiseState *st;
	double *in;
	double *out;
	float gain;
	float gain_db;
	float agc_att_a;
	float agc_rel_a;

	int buffer_size;
	int rate;
	float* output_buffer;

	float* to_process_buffer;
	float* processed_output_buffer;

	rnnr_ring_buffer input_ring;
	rnnr_ring_buffer output_ring;

	CRITICAL_SECTION cs;

} rnnr, *RNNR;

extern RNNR create_rnnr (int run, int position, int size, double *in, double *out, int rate);
extern void setSize_rnnr(RNNR a, int size);
extern void setBuffers_rnnr (RNNR a, double* in, double* out);
extern void destroy_rnnr (RNNR a);
extern void xrnnr (RNNR a, int pos);
extern void setSamplerate_rnnr(RNNR a, int rate);

#endif //_rnnr_h