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/* General functions for signal processing - Header
* Copyright (C) 1998 J.A. Bezemer
*
* Licensed under the terms of the GNU General Public License.
* ABSOLUTELY NO WARRANTY.
* See the file `COPYING' in this directory.
*/
#ifndef HAVE_SIGNPR_GENERAL_H
#define HAVE_SIGNPR_GENERAL_H
#include "scrollmenu.h"
/* SAMPLES */
typedef struct
{
signed short left;
signed short right;
}
sample_t;
typedef struct
{
signed long left;
signed long right;
}
longsample_t;
typedef struct
{
double left;
double right;
}
doublesample_t;
/* BUFFER */
typedef struct
{
sample_t *array;
long currpos;
long arraylength;
long pre_length; /* "read ahead" */
long post_length; /* "remember" */
#ifdef TURBO_BUFFER
int *indextable;
#endif
}
buffer_t;
/* PARAM */
typedef struct
{
buffer_t buffer;
buffer_t buffer2;
buffer_t buffer3;
buffer_t buffer4;
int filterno; /* 'serial number' of filter,
0=read_from_disk */
long postlength1, prelength1, postlength2, prelength2, postlength3,
prelength3, postlength4, prelength4;
signed short *sslist1;
signed short *sslist2;
int int1;
long long1;
long long2;
}
param_t;
typedef param_t *parampointer_t;
/* FILTER DATA */
#define MAX_FILTERS 50
extern parampointer_t parampointerarray[MAX_FILTERS];
extern int filter_type[MAX_FILTERS];
extern int number_of_filters;
/* BASIC SCREEN I/O */
void write_sample_to_screen (sample_t data);
sample_t read_from_keyboard ();
/* BUFFER FILL FUNCTION */
typedef sample_t (*fillfuncpointer_t) (long offset, long offset_zero,
parampointer_t parampointer);
/* BUFFER FUNCTIONS */
buffer_t init_buffer (long post_length, long pre_length);
void delete_buffer (buffer_t * buffer);
#ifdef TURBO_BUFFER
#define get_from_buffer(buffer,offset) (buffer)->array[(buffer)->indextable[(buffer)->currpos+offset]]
#define put_in_buffer(buffer,offset,sample) (buffer)->array[(buffer)->indextable[(buffer)->currpos+offset]]=sample
#else /* if not TURBO_BUFFER */
sample_t get_from_buffer (buffer_t * buffer, long offset);
void put_in_buffer (buffer_t * buffer, long offset, sample_t sample);
#endif /* (not) TURBO_BUFFER */
void advance_current_pos (buffer_t * buffer, int filterno);
void advance_current_pos_custom (buffer_t * buffer, fillfuncpointer_t fillfunc,
long offset_zero, parampointer_t parampointer);
/* QUICK SORT */
/* One for signed shorts, max size 32676 */
void qsort2 (signed short *a, int n); /* a: pointer to start of array */
/* n: # elements in array */
/* And one for doubles, max size 2G */
void qsort2double (double *a, long n); /* a: pointer to start of array */
/* n: # elements in array */
/* MEDIAN */
signed short median (signed short *a, int n);
/* BUILDING THE LIST OF FILTERS */
void add_to_filterlist (scrollmenu_t * filtlist, int *filtnumbers,
char **helptexts, int filternumber, char *filtername,
char *helptext);
void make_filterlist (scrollmenu_t * filtlist, int *filtnumbers,
char **helptexts);
/* GET SAMPLE FROM FILTER */
sample_t get_sample_from_filter (int filterno);
/* INIT & DELETE FILTERS */
void init_filters ();
void delete_filters ();
/* PARAM DEFAULTS */
void param_defaults (parampointer_t parampointer, int filtertype);
/* PARAM SCREENS */
void param_screen (parampointer_t parampointer, int filtertype);
/* FILTER NUMBERS ETC. */
#define SIMPLE_MEDIAN_FILTER 1
#define SIMPLE_MEDIAN_NAME "Simple Median Filter"
#define SIMPLE_MEDIAN_HELPTEXT \
"Interpolate short ticks."
#define SIMPLE_MEAN_FILTER 2
#define SIMPLE_MEAN_NAME "Simple Mean Filter"
#define SIMPLE_MEAN_HELPTEXT \
"'Smooth' the signal by taking the mean of samples."
#define COND_MEDIAN_FILTER 3
#define COND_MEDIAN_NAME "Conditional Median Filter"
#define COND_MEDIAN_HELPTEXT \
"Remove ticks while not changing rest of signal."
#define DOUBLE_MEDIAN_FILTER 4
#define DOUBLE_MEDIAN_NAME "Double Median Filter"
#define DOUBLE_MEDIAN_HELPTEXT \
"Interpolate short ticks and correct interpolations."
#define COND_MEDIAN2_FILTER 5
#define COND_MEDIAN2_NAME "Conditional Median Filter II"
#define COND_MEDIAN2_HELPTEXT \
"Remove ticks while not changing rest of signal - Better."
#define RMS_FILTER 6
#define RMS_NAME "RMS Filter"
#define RMS_HELPTEXT \
"Compute the `running' Root-Mean-Square of the signal."
#define COPYONLY_FILTER 7
#define COPYONLY_NAME "Copy Only"
#define COPYONLY_HELPTEXT \
"Do nothing - just copy the signal unchanged."
#define MONOIZE_FILTER 8
#define MONOIZE_NAME "Convert to mono"
#define MONOIZE_HELPTEXT \
"Average left & right signals."
#define EXPERIMENT_FILTER 9
#define EXPERIMENT_NAME "Experimenting Filter"
#define EXPERIMENT_HELPTEXT \
"The filter YOU are experimenting with (in signpr_exper.c)"
#endif /* HAVE_SIGNPR_GENERAL_H */
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