iir.c File Reference

#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <retro_miscellaneous.h>
#include <libretro_dspfilter.h>
#include <string/stdstring.h>

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Classes
struct	iir_data

Macros
#define	sqr(a)   ((a) * (a))
#define	CHECK(x)   if (string_is_equal(str, #x)) return x

Enumerations
enum	IIRFilter {   LPF, HPF, BPCSGF, BPZPGF,   APF, NOTCH, RIAA_phono, PEQ,   BBOOST, LSH, HSH, RIAA_CD }

Functions
static void	iir_free (void *data)
static void	iir_process (void *data, struct dspfilter_output *output, const struct dspfilter_input *input)
static enum IIRFilter	str_to_type (const char *str)
static void	make_poly_from_roots (const double *roots, unsigned num_roots, float *poly)
static void	iir_filter_init (struct iir_data *iir, float sample_rate, float freq, float qual, float gain, enum IIRFilter filter_type)
static void *	iir_init (const struct dspfilter_info *info, const struct dspfilter_config *config, void *userdata)
const struct dspfilter_implementation *	dspfilter_get_implementation (dspfilter_simd_mask_t mask)

Variables
static const struct dspfilter_implementation	iir_plug

Macro Definition Documentation

CHECK

#define CHECK

(

x

)

if (string_is_equal(str, #x)) return x

sqr

#define sqr

(

a

)

((a) * (a))

Enumeration Type Documentation

IIRFilter

enum IIRFilter

Enumerator
LPF
HPF
BPCSGF
BPZPGF
APF
NOTCH
RIAA_phono
PEQ
BBOOST
LSH
HSH
RIAA_CD

Function Documentation

dspfilter_get_implementation()

const struct dspfilter_implementation* dspfilter_get_implementation

(

dspfilter_simd_mask_t

mask

)

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iir_filter_init()

static void iir_filter_init ( struct iir_data *  iir, float  sample_rate, float  freq, float  qual, float  gain, enum IIRFilter  filter_type  )

static

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iir_free()

static void iir_free ( void *  data )

static

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iir_init()

static void* iir_init ( const struct dspfilter_info *  info, const struct dspfilter_config *  config, void *  userdata  )

static

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iir_process()

static void iir_process ( void *  data, struct dspfilter_output *  output, const struct dspfilter_input *  input  )

static

make_poly_from_roots()

static void make_poly_from_roots ( const double *  roots, unsigned  num_roots, float *  poly  )

static

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str_to_type()

static enum IIRFilter str_to_type ( const char *  str )

static

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Variable Documentation

iir_plug

const struct dspfilter_implementation iir_plug

static

Initial value:

= {
   iir_init,
   iir_process,
   iir_free,

   DSPFILTER_API_VERSION,
   "IIR",
   "iir",
}