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#ifndef EQUALIZER_H
#define EQUALIZER_H
#ifdef __cplusplus
extern "C" {
#endif
#define TWOPI (2.0 * M_PI)
#define NEWLINE 0x0A
#define CRETURN 0x0D
#define SPACE 0x20
#define EQSET_HEADER "EQSET"
#define EQUALIZER_CFG_ACTIVE "Active:"
#define EQUALIZER_CFG_PRESET "Preset:"
#define EQUALIZER_CFG_MIXIN "Mixin:"
#define EQUALIZER_SAVE_FILE "equalizer"
#define EQUALIZER_SAVE_OPTION "Equalizer_SaveState"
char *skip_line(char *s);
char *skip_whitespace(char *s);
char *word(char *s, char *buf, int *len, int nmax);
int read_float(char *s, float *f, char **endp);
typedef struct t_biquad t_biquad;
struct t_biquad
{
float a0, a1, a2, a3, a4;
float x1, x2, y1, y2;
float cf, bw, gain, srate;
int israte;
};
typedef struct t_eq_setup t_eq_setup;
struct t_eq_setup
{
char *name;
float preamp;
int bcount;
float *cf;
float *bw;
float *dg;
};
typedef struct t_eq_set t_eq_set;
struct t_eq_set
{
char *name;
int channels;
float preamp;
int bcount;
t_biquad *b;
};
typedef struct t_eq_set_list t_eq_set_list;
struct t_eq_set_list
{
t_eq_set *set;
t_eq_set_list *prev, *next;
};
typedef struct t_active_set t_active_set;
struct t_active_set
{
int srate;
t_eq_set *set;
};
typedef struct t_eq_settings t_eq_settings;
struct t_eq_settings
{
char *preset_name;
int bcount;
float *gain;
t_eq_settings *next;
};
void equalizer_init();
void equalizer_shutdown();
void equalizer_process_buffer(char *buf, size_t size, const struct sound_params *sound_params);
void equalizer_refresh();
int equalizer_is_active();
int equalizer_set_active();
char *equalizer_current_eqname();
void equalizer_next();
void equalizer_prev();
#ifdef __cplusplus
}
#endif
#endif
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