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//-*- C++ -*-
/*
* lingot, a musical instrument tuner.
*
* Copyright (C) 2004-2007 Ibán Cereijo Graña, Jairo Chapela Martínez.
*
* This file is part of lingot.
*
* lingot 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.
*
* lingot 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 lingot; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __LINGOT_CORE_H__
#define __LINGOT_CORE_H__
#include <pthread.h>
#include "lingot-defs.h"
#include "lingot-complex.h"
#include "lingot-filter.h"
#include "lingot-config.h"
#ifdef LIB_FFTW
# include <fftw.h>
#endif
#ifdef LIBSNDOBJ
# include <SndObj/AudioDefs.h>
#else
# include "lingot-audio.h"
#endif
typedef struct _LingotCore LingotCore;
struct _LingotCore {
// -- shared data --
FLT freq; // analog frequency calculated.
FLT* X; // visual portion of FFT.
// -- shared data --
# ifdef LIBSNDOBJ
SndRTIO* audio; // audio handler.
# else
LingotAudio* audio; // audio handler.
# endif
SAMPLE_TYPE* read_buffer;
FLT* flt_read_buffer;
FLT* temporal_buffer; // sample memory.
// precomputed hamming windows
FLT* hamming_window_temporal;
FLT* hamming_window_fft;
// windowed signals
FLT* windowed_temporal_buffer;
FLT* windowed_fft_buffer;
// spectral power distribution esteem.
FLT* spd_fft;
FLT* spd_dft;
FLT* diff2_spd_fft;
# ifdef LIB_FFTW
fftw_complex* fftw_in;
fftw_complex* fftw_out; // complex signals in time and freq.
fftw_plan fftwplan;
# else
LingotComplex* fft_out; // complex signal in freq.
# endif
LingotFilter* antialiasing_filter; // antialiasing filter for decimation.
int running;
LingotConfig* conf; // configuration structure
// pthread-related member variables
pthread_t thread;
pthread_attr_t attr;
};
//----------------------------------------------------------------
LingotCore* lingot_core_new(LingotConfig*);
void lingot_core_destroy(LingotCore*);
// start process
void lingot_core_start(LingotCore*);
// stop process
void lingot_core_stop(LingotCore*);
// process thread
void lingot_core_run(LingotCore*);
#endif //__LINGOT_CORE_H__
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