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#ifndef FILTER_SPLITTER_H
#define FILTER_SPLITTER_H
#include "alMain.h"
#include "almalloc.h"
/* Band splitter. Splits a signal into two phase-matching frequency bands. */
struct BandSplitter {
ALfloat coeff{0.0f};
ALfloat lp_z1{0.0f};
ALfloat lp_z2{0.0f};
ALfloat hp_z1{0.0f};
};
void bandsplit_init(BandSplitter *splitter, ALfloat f0norm);
void bandsplit_clear(BandSplitter *splitter);
void bandsplit_process(BandSplitter *splitter, ALfloat *RESTRICT hpout, ALfloat *RESTRICT lpout,
const ALfloat *input, ALsizei count);
/* The all-pass portion of the band splitter. Applies the same phase shift
* without splitting the signal.
*/
struct SplitterAllpass {
ALfloat coeff{0.0f};
ALfloat z1{0.0f};
};
void splitterap_init(SplitterAllpass *splitter, ALfloat f0norm);
void splitterap_clear(SplitterAllpass *splitter);
void splitterap_process(SplitterAllpass *splitter, ALfloat *RESTRICT samples, ALsizei count);
struct FrontStablizer {
SplitterAllpass APFilter[MAX_OUTPUT_CHANNELS];
BandSplitter LFilter, RFilter;
alignas(16) ALfloat LSplit[2][BUFFERSIZE];
alignas(16) ALfloat RSplit[2][BUFFERSIZE];
DEF_NEWDEL(FrontStablizer)
};
#endif /* FILTER_SPLITTER_H */
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