/***********************************************************************
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are permitted provided that the following conditions are met:
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this software without specific prior written permission. 
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BY THIS LICENSE.  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
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***********************************************************************/

#ifndef SKP_SILK_MAIN_FIX_H
#define SKP_SILK_MAIN_FIX_H

#include <stdlib.h>
#include "SKP_Silk_SigProc_FIX.h"
#include "SKP_Silk_structs_FIX.h"
#include "SKP_Silk_main.h"
#include "SKP_Silk_PLC.h"
#define TIC(TAG_NAME)
#define TOC(TAG_NAME)

#ifndef FORCE_CPP_BUILD
#ifdef __cplusplus
extern "C"
{
#endif
#endif

/*********************/
/* Encoder Functions */
/*********************/

/* Initializes the Silk encoder state */
SKP_int SKP_Silk_init_encoder_FIX(
    SKP_Silk_encoder_state_FIX  *psEnc                  /* I/O  Pointer to Silk FIX encoder state       */
);

/* Control the Silk encoder */
SKP_int SKP_Silk_control_encoder_FIX( 
    SKP_Silk_encoder_state_FIX  *psEnc,                 /* I/O  Pointer to Silk encoder state           */
    const SKP_int               PacketSize_ms,          /* I    Packet length (ms)                      */
    const SKP_int32             TargetRate_bps,         /* I    Target max bitrate (bps)                */
    const SKP_int               PacketLoss_perc,        /* I    Packet loss rate (in percent)           */
    const SKP_int               DTX_enabled,            /* I    Enable / disable DTX                    */
    const SKP_int               Complexity              /* I    Complexity (0->low; 1->medium; 2->high) */
);

/* Encoder main function */
SKP_int SKP_Silk_encode_frame_FIX( 
    SKP_Silk_encoder_state_FIX      *psEnc,             /* I/O  Pointer to Silk FIX encoder state           */
    SKP_uint8                       *pCode,             /* O    Pointer to payload                          */
    SKP_int16                       *pnBytesOut,        /* I/O  Pointer to number of payload bytes;         */
                                                        /*      input: max length; output: used             */
    const SKP_int16                 *pIn                /* I    Pointer to input speech frame               */
);

/* Low BitRate Redundancy encoding functionality.  Reuse all parameters but encode with lower bitrate */
void SKP_Silk_LBRR_encode_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  Pointer to Silk FIX encoder state           */
    SKP_Silk_encoder_control_FIX    *psEncCtrl,     /* I/O  Pointer to Silk FIX encoder control struct  */
    SKP_uint8                       *pCode,         /* O    Pointer to payload                          */
    SKP_int16                       *pnBytesOut,    /* I/O  Pointer to number of payload bytes          */
    SKP_int16                       xfw[]           /* I    Input signal                                */
);

/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
void SKP_Silk_HP_variable_cutoff_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  Encoder state                               */
    SKP_Silk_encoder_control_FIX    *psEncCtrl,     /* I/O  Encoder control                             */
    SKP_int16                       *out,           /* O    high-pass filtered output signal            */
    const SKP_int16                 *in             /* I    input signal                                */
);

/****************/
/* Prefiltering */
/****************/
void SKP_Silk_prefilter_FIX(
    SKP_Silk_encoder_state_FIX          *psEnc,         /* I/O  Encoder state                               */
    const SKP_Silk_encoder_control_FIX  *psEncCtrl,     /* I    Encoder control                             */
    SKP_int16                           xw[],           /* O    Weighted signal                             */
    const SKP_int16                     x[]             /* I    Speech signal                               */
);

/**************************************************************/
/* Compute noise shaping coefficients and initial gain values */
/**************************************************************/
void SKP_Silk_noise_shape_analysis_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  Encoder state FIX                           */
    SKP_Silk_encoder_control_FIX    *psEncCtrl,     /* I/O  Encoder control FIX                         */
    const SKP_int16                 *pitch_res,     /* I    LPC residual from pitch analysis            */
    const SKP_int16                 *x              /* I    Input signal [ frame_length + la_shape ]    */
);

/* Autocorrelations for a warped frequency axis */
void SKP_Silk_warped_autocorrelation_FIX(
          SKP_int32                 *corr,              /* O    Result [order + 1]                      */
          SKP_int                   *scale,             /* O    Scaling of the correlation vector       */
    const SKP_int16                 *input,             /* I    Input data to correlate                 */
    const SKP_int16                 warping_Q16,        /* I    Warping coefficient                     */
    const SKP_int                   length,             /* I    Length of input                         */
    const SKP_int                   order               /* I    Correlation order (even)                */
);

/* Processing of gains */
void SKP_Silk_process_gains_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  Encoder state                               */
    SKP_Silk_encoder_control_FIX    *psEncCtrl      /* I/O  Encoder control                             */
);

/* Control low bitrate redundancy usage */
void SKP_Silk_LBRR_ctrl_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  encoder state                               */
    SKP_Silk_encoder_control        *psEncCtrlC     /* I/O  encoder control                             */
);

/* Calculation of LTP state scaling */
void SKP_Silk_LTP_scale_ctrl_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  encoder state                               */
    SKP_Silk_encoder_control_FIX    *psEncCtrl      /* I/O  encoder control                             */
);

/**********************************************/
/* Prediction Analysis                        */
/**********************************************/

/* Find pitch lags */
void SKP_Silk_find_pitch_lags_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  encoder state                               */
    SKP_Silk_encoder_control_FIX    *psEncCtrl,     /* I/O  encoder control                             */
    SKP_int16                       res[],          /* O    residual                                    */
    const SKP_int16                 x[]             /* I    Speech signal                               */
);

void SKP_Silk_find_pred_coefs_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,         /* I/O  encoder state                               */
    SKP_Silk_encoder_control_FIX    *psEncCtrl,     /* I/O  encoder control                             */
    const SKP_int16                 res_pitch[]     /* I    Residual from pitch analysis                */
);

void SKP_Silk_find_LPC_FIX(
    SKP_int             NLSF_Q15[],             /* O    NLSFs                                                                       */
    SKP_int             *interpIndex,           /* O    NLSF interpolation index, only used for NLSF interpolation                  */
    const SKP_int       prev_NLSFq_Q15[],       /* I    previous NLSFs, only used for NLSF interpolation                            */
    const SKP_int       useInterpolatedLSFs,    /* I    Flag                                                                        */
    const SKP_int       LPC_order,              /* I    LPC order                                                                   */
    const SKP_int16     x[],                    /* I    Input signal                                                                */
    const SKP_int       subfr_length            /* I    Input signal subframe length including preceeding samples                   */
);

void SKP_Silk_warped_LPC_analysis_filter_FIX(
          SKP_int32                 state[],            /* I/O  State [order + 1]                       */
          SKP_int16                 res[],              /* O    Residual signal [length]                */
    const SKP_int16                 coef_Q13[],         /* I    Coefficients [order]                    */
    const SKP_int16                 input[],            /* I    Input signal [length]                   */
    const SKP_int16                 lambda_Q16,         /* I    Warping factor                          */
    const SKP_int                   length,             /* I    Length of input signal                  */
    const SKP_int                   order               /* I    Filter order (even)                     */
);

void SKP_Silk_LTP_analysis_filter_FIX(
    SKP_int16       *LTP_res,                           /* O:   LTP residual signal of length NB_SUBFR * ( pre_length + subfr_length )  */
    const SKP_int16 *x,                                 /* I:   Pointer to input signal with at least max( pitchL ) preceeding samples  */
    const SKP_int16 LTPCoef_Q14[ LTP_ORDER * NB_SUBFR ],/* I:   LTP_ORDER LTP coefficients for each NB_SUBFR subframe                   */
    const SKP_int   pitchL[ NB_SUBFR ],                 /* I:   Pitch lag, one for each subframe                                        */
    const SKP_int32 invGains_Q16[ NB_SUBFR ],           /* I:   Inverse quantization gains, one for each subframe                       */
    const SKP_int   subfr_length,                       /* I:   Length of each subframe                                                 */
    const SKP_int   pre_length                          /* I:   Length of the preceeding samples starting at &x[0] for each subframe    */
);

/* Finds LTP vector from correlations */
void SKP_Silk_find_LTP_FIX(
    SKP_int16           b_Q14[ NB_SUBFR * LTP_ORDER ],              /* O    LTP coefs                                                   */
    SKP_int32           WLTP[ NB_SUBFR * LTP_ORDER * LTP_ORDER ],   /* O    Weight for LTP quantization                                 */
    SKP_int             *LTPredCodGain_Q7,                          /* O    LTP coding gain                                             */
    const SKP_int16     r_first[],                                  /* I    residual signal after LPC signal + state for first 10 ms    */
    const SKP_int16     r_last[],                                   /* I    residual signal after LPC signal + state for last 10 ms     */
    const SKP_int       lag[ NB_SUBFR ],                            /* I    LTP lags                                                    */
    const SKP_int32     Wght_Q15[ NB_SUBFR ],                       /* I    weights                                                     */
    const SKP_int       subfr_length,                               /* I    subframe length                                             */
    const SKP_int       mem_offset,                                 /* I    number of samples in LTP memory                             */
    SKP_int             corr_rshifts[ NB_SUBFR ]                    /* O    right shifts applied to correlations                        */
);

/* LTP tap quantizer */
void SKP_Silk_quant_LTP_gains_FIX(
    SKP_int16               B_Q14[],                /* I/O  (un)quantized LTP gains     */
    SKP_int                 cbk_index[],            /* O    Codebook Index              */
    SKP_int                 *periodicity_index,     /* O    Periodicity Index           */
    const SKP_int32         W_Q18[],                /* I    Error Weights in Q18        */
    SKP_int                 mu_Q8,                  /* I    Mu value (R/D tradeoff)     */
    SKP_int                 lowComplexity           /* I    Flag for low complexity     */
);

/******************/
/* NLSF Quantizer */
/******************/

/* Limit, stabilize, convert and quantize NLSFs.     */ 
void SKP_Silk_process_NLSFs_FIX(
    SKP_Silk_encoder_state_FIX      *psEnc,     /* I/O  encoder state                               */
    SKP_Silk_encoder_control_FIX    *psEncCtrl, /* I/O  encoder control                             */
    SKP_int                         *pNLSF_Q15  /* I/O  Normalized LSFs (quant out) (0 - (2^15-1))  */
);

/* NLSF vector encoder */
void SKP_Silk_NLSF_MSVQ_encode_FIX(
          SKP_int                   *NLSFIndices,           /* O    Codebook path vector [ CB_STAGES ]      */
          SKP_int                   *pNLSF_Q15,             /* I/O  Quantized NLSF vector [ LPC_ORDER ]     */
    const SKP_Silk_NLSF_CB_struct   *psNLSF_CB,             /* I    Codebook object                         */
    const SKP_int                   *pNLSF_q_Q15_prev,      /* I    Prev.  quantized NLSF vector [LPC_ORDER] */
    const SKP_int                   *pW_Q6,                 /* I    NLSF weight vector [ LPC_ORDER ]        */
    const SKP_int                   NLSF_mu_Q15,            /* I    Rate weight for the RD optimization     */
    const SKP_int                   NLSF_mu_fluc_red_Q16,   /* I    Fluctuation reduction error weight      */
    const SKP_int                   NLSF_MSVQ_Survivors,    /* I    Max survivors from each stage           */
    const SKP_int                   LPC_order,              /* I    LPC order                               */
    const SKP_int                   deactivate_fluc_red     /* I    Deactivate fluctuation reduction        */
);

/* Rate-Distortion calculations for multiple input data vectors */
void SKP_Silk_NLSF_VQ_rate_distortion_FIX(
    SKP_int32                       *pRD_Q20,           /* O    Rate-distortion values [psNLSF_CBS->nVectors*N] */
    const SKP_Silk_NLSF_CBS         *psNLSF_CBS,        /* I    NLSF codebook stage struct                      */
    const SKP_int                   *in_Q15,            /* I    Input vectors to be quantized                   */
    const SKP_int                   *w_Q6,              /* I    Weight vector                                   */
    const SKP_int32                 *rate_acc_Q5,       /* I    Accumulated rates from previous stage           */
    const SKP_int                   mu_Q15,             /* I    Weight between weighted error and rate          */
    const SKP_int                   N,                  /* I    Number of input vectors to be quantized         */
    const SKP_int                   LPC_order           /* I    LPC order                                       */
);

/* Compute weighted quantization errors for an LPC_order element input vector, over one codebook stage */
void SKP_Silk_NLSF_VQ_sum_error_FIX(
    SKP_int32                       *err_Q20,           /* O    Weighted quantization errors  [N*K]         */
    const SKP_int                   *in_Q15,            /* I    Input vectors to be quantized [N*LPC_order] */
    const SKP_int                   *w_Q6,              /* I    Weighting vectors             [N*LPC_order] */
    const SKP_int16                 *pCB_Q15,           /* I    Codebook vectors              [K*LPC_order] */
    const SKP_int                   N,                  /* I    Number of input vectors                     */
    const SKP_int                   K,                  /* I    Number of codebook vectors                  */
    const SKP_int                   LPC_order           /* I    Number of LPCs                              */
);

/* Entropy constrained MATRIX-weighted VQ, for a single input data vector */
void SKP_Silk_VQ_WMat_EC_FIX(
    SKP_int                         *ind,               /* O    index of best codebook vector               */
    SKP_int32                       *rate_dist_Q14,     /* O    best weighted quantization error + mu * rate*/
    const SKP_int16                 *in_Q14,            /* I    input vector to be quantized                */
    const SKP_int32                 *W_Q18,             /* I    weighting matrix                            */
    const SKP_int16                 *cb_Q14,            /* I    codebook                                    */
    const SKP_int16                 *cl_Q6,             /* I    code length for each codebook vector        */
    const SKP_int                   mu_Q8,              /* I    tradeoff between weighted error and rate    */
    SKP_int                         L                   /* I    number of vectors in codebook               */
);

/******************/
/* Linear Algebra */
/******************/

/* Calculates correlation matrix X'*X */
void SKP_Silk_corrMatrix_FIX(
    const SKP_int16                 *x,         /* I    x vector [L + order - 1] used to form data matrix X */
    const SKP_int                   L,          /* I    Length of vectors                                   */
    const SKP_int                   order,      /* I    Max lag for correlation                             */
    const SKP_int                   head_room,  /* I    Desired headroom                                    */
    SKP_int32                       *XX,        /* O    Pointer to X'*X correlation matrix [ order x order ]*/
    SKP_int                         *rshifts    /* I/O  Right shifts of correlations                        */
);

/* Calculates correlation vector X'*t */
void SKP_Silk_corrVector_FIX(
    const SKP_int16                 *x,         /* I    x vector [L + order - 1] used to form data matrix X */
    const SKP_int16                 *t,         /* I    Target vector [L]                                   */
    const SKP_int                   L,          /* I    Length of vectors                                   */
    const SKP_int                   order,      /* I    Max lag for correlation                             */
    SKP_int32                       *Xt,        /* O    Pointer to X'*t correlation vector [order]          */
    const SKP_int                   rshifts     /* I    Right shifts of correlations                        */
);

/* Add noise to matrix diagonal */
void SKP_Silk_regularize_correlations_FIX(
    SKP_int32                       *XX,                /* I/O  Correlation matrices                        */
    SKP_int32                       *xx,                /* I/O  Correlation values                          */
    SKP_int32                       noise,              /* I    Noise to add                                */
    SKP_int                         D                   /* I    Dimension of XX                             */
);

/* Solves Ax = b, assuming A is symmetric */
void SKP_Silk_solve_LDL_FIX(
    SKP_int32                       *A,                 /* I    Pointer to symetric square matrix A         */
    SKP_int                         M,                  /* I    Size of matrix                              */
    const SKP_int32                 *b,                 /* I    Pointer to b vector                         */
    SKP_int32                       *x_Q16              /* O    Pointer to x solution vector                */
);

/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
SKP_int32 SKP_Silk_residual_energy16_covar_FIX(
    const SKP_int16                 *c,                 /* I    Prediction vector                           */
    const SKP_int32                 *wXX,               /* I    Correlation matrix                          */
    const SKP_int32                 *wXx,               /* I    Correlation vector                          */
    SKP_int32                       wxx,                /* I    Signal energy                               */
    SKP_int                         D,                  /* I    Dimension                                   */
    SKP_int                         cQ                  /* I    Q value for c vector 0 - 15                 */
);

/* Calculates residual energies of input subframes where all subframes have LPC_order   */
/* of preceeding samples                                                                */
void SKP_Silk_residual_energy_FIX(
          SKP_int32 nrgs[ NB_SUBFR ],           /* O    Residual energy per subframe    */
          SKP_int   nrgsQ[ NB_SUBFR ],          /* O    Q value per subframe            */
    const SKP_int16 x[],                        /* I    Input signal                    */
          SKP_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ],/* I    AR coefs for each frame half    */
    const SKP_int32 gains[ NB_SUBFR ],          /* I    Quantization gains              */
    const SKP_int   subfr_length,               /* I    Subframe length                 */
    const SKP_int   LPC_order                   /* I    LPC order                       */
);

#ifndef FORCE_CPP_BUILD
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* FORCE_CPP_BUILD */
#endif /* SKP_SILK_MAIN_FIX_H */
