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#define CASCADE_PARALLEL 1 /* Type of synthesis model */
#define ALL_PARALLEL 2
#define IMPULSIVE 1 /* Type of voicing source */
#define NATURAL 2
#define SAMPLED 3
#define SAMPLED2 4
#define PI 3.1415927
/* typedef's that need to be exported */
typedef long flag;
/* Resonator Structure */
typedef struct
{
double a;
double b;
double c;
double p1;
double p2;
double a_inc;
double b_inc;
double c_inc;
} resonator_t, *resonator_ptr;
/* Structure for Klatt Globals */
typedef struct
{
flag synthesis_model; /* cascade-parallel or all-parallel */
flag outsl; /* Output waveform selector */
long samrate; /* Number of output samples per second */
long FLPhz ; /* Frequeny of glottal downsample low-pass filter */
long BLPhz ; /* Bandwidth of glottal downsample low-pass filter */
flag glsource; /* Type of glottal source */
int f0_flutter; /* Percentage of f0 flutter 0-100 */
long nspfr; /* number of samples per frame */
long nper; /* Counter for number of samples in a pitch period */
long ns;
long T0; /* Fundamental period in output samples times 4 */
long nopen; /* Number of samples in open phase of period */
long nmod; /* Position in period to begin noise amp. modul */
long nrand; /* Varible used by random number generator */
double pulse_shape_a; /* Makes waveshape of glottal pulse when open */
double pulse_shape_b; /* Makes waveshape of glottal pulse when open */
double minus_pi_t;
double two_pi_t;
double onemd;
double decay;
double amp_bypas; /* AB converted to linear gain */
double amp_voice; /* AVdb converted to linear gain */
double par_amp_voice; /* AVpdb converted to linear gain */
double amp_aspir; /* AP converted to linear gain */
double amp_frica; /* AF converted to linear gain */
double amp_breth; /* ATURB converted to linear gain */
double amp_gain0; /* G0 converted to linear gain */
int num_samples; /* number of glottal samples */
double sample_factor; /* multiplication factor for glottal samples */
short *natural_samples; /* pointer to an array of glottal samples */
long original_f0; /* original value of f0 not modified by flutter */
int fadeout; // set to 64 to cause fadeout over 64 samples
int scale_wav; // depends on the voicing source
#define N_RSN 20
#define Rnz 0 // nasal zero, anti-resonator
#define R1c 1
#define R2c 2
#define R3c 3
#define R4c 4
#define R5c 5
#define R6c 6
#define R7c 7
#define R8c 8
#define Rnpc 9 // nasal pole
#define Rparallel 10
#define Rnpp 10
#define R1p 11
#define R2p 12
#define R3p 13
#define R4p 14
#define R5p 15
#define R6p 16
#define RGL 17
#define RLP 18
#define Rout 19
resonator_t rsn[N_RSN]; // internal storage for resonators
resonator_t rsn_next[N_RSN];
} klatt_global_t, *klatt_global_ptr;
/* Structure for Klatt Parameters */
#define F_NZ 0 // nasal zero formant
#define F1 1
#define F2 2
#define F3 3
#define F4 4
#define F5 5
#define F6 6
#define F_NP 9 // nasal pole formant
typedef struct
{
int F0hz10; /* Voicing fund freq in Hz */
int AVdb; /* Amp of voicing in dB, 0 to 70 */
int Fhz[10]; // formant Hz, F_NZ to F6 to F_NP
int Bhz[10];
int Ap[10]; /* Amp of parallel formants in dB, 0 to 80 */
int Bphz[10]; /* Parallel formants bw in Hz, 40 to 1000 */
int ASP; /* Amp of aspiration in dB, 0 to 70 */
int Kopen; /* # of samples in open period, 10 to 65 */
int Aturb; /* Breathiness in voicing, 0 to 80 */
int TLTdb; /* Voicing spectral tilt in dB, 0 to 24 */
int AF; /* Amp of frication in dB, 0 to 80 */
int Kskew; /* Skewness of alternate periods, 0 to 40 in sample#/2 */
int AB; /* Amp of bypass fric. in dB, 0 to 80 */
int AVpdb; /* Amp of voicing, par in dB, 0 to 70 */
int Gain0; /* Overall gain, 60 dB is unity, 0 to 60 */
int AVdb_tmp; //copy of AVdb, which is changed within parwave()
int Fhz_next[10]; // Fhz for the next chunk, so we can do interpolation of resonator (a,b,c) parameters
int Bhz_next[10];
} klatt_frame_t, *klatt_frame_ptr;
typedef struct {
int freq; // Hz
int bw; // klatt bandwidth
int ap; // parallel amplitude
int bp; // parallel bandwidth
DOUBLEX freq1; // floating point versions of the above
DOUBLEX bw1;
DOUBLEX ap1;
DOUBLEX bp1;
DOUBLEX freq_inc; // increment by this every 64 samples
DOUBLEX bw_inc;
DOUBLEX ap_inc;
DOUBLEX bp_inc;
} klatt_peaks_t;
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