ref: c77b96333b471c7b8a89852ee941e6a8987751b4
dir: /silk/fixed/SKP_Silk_main_FIX.h/
/***********************************************************************
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***********************************************************************/
#ifndef SKP_SILK_MAIN_FIX_H
#define SKP_SILK_MAIN_FIX_H
#include "SKP_Silk_SigProc_FIX.h"
#include "SKP_Silk_structs_FIX.h"
#include "SKP_Silk_control.h"
#include "SKP_Silk_main.h"
#include "SKP_Silk_PLC.h"
#include "SKP_debug.h"
#include "entenc.h"
#ifndef FORCE_CPP_BUILD
#ifdef __cplusplus
extern "C"
{
#endif
#endif
/*********************/
/* Encoder Functions */
/*********************/
/* 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_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */
ec_enc *psRangeEnc /* I/O compressor data structure */
);
/* Low Bitrate Redundancy (LBRR) encoding. 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 */
const SKP_int16 xfw[] /* I Input signal */
);
/* Initializes the Silk encoder state */
SKP_int SKP_Silk_init_encoder(
SKP_Silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */
);
/* Control the Silk encoder */
SKP_int SKP_Silk_control_encoder(
SKP_Silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk encoder state */
SKP_SILK_SDK_EncControlStruct *encControl, /* I: Control structure */
const SKP_int32 TargetRate_bps, /* I Target max bitrate (bps) */
const SKP_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
const SKP_int channelNb /* I Channel number */
);
/****************/
/* 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 */
);
/**************************/
/* Noise shaping analysis */
/**************************/
/* 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_int warping_Q16, /* I Warping coefficient */
const SKP_int length, /* I Length of input */
const SKP_int order /* I Correlation order (even) */
);
/* 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 */
);
/* Find LPC and LTP coefficients */
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 */
const SKP_int16 x[] /* I Speech signal */
);
/* LPC analysis */
void SKP_Silk_find_LPC_FIX(
SKP_int16 NLSF_Q15[], /* O NLSFs */
SKP_int8 *interpIndex, /* O NLSF interpolation index, only used for NLSF interpolation */
const SKP_int16 prev_NLSFq_Q15[], /* I previous NLSFs, only used for NLSF interpolation */
const SKP_int useInterpNLSFs, /* I Flag */
const SKP_int firstFrameAfterReset, /* 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 */
const SKP_int nb_subfr /* I: Number of subframes */
);
/* LTP analysis */
void SKP_Silk_find_LTP_FIX(
SKP_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
SKP_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
SKP_int *LTPredCodGain_Q7, /* O LTP coding gain */
const SKP_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */
const SKP_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
const SKP_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */
const SKP_int subfr_length, /* I subframe length */
const SKP_int nb_subfr, /* I number of subframes */
const SKP_int mem_offset, /* I number of samples in LTP memory */
SKP_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */
);
void SKP_Silk_LTP_analysis_filter_FIX(
SKP_int16 *LTP_res, /* O: LTP residual signal of length MAX_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 * MAX_NB_SUBFR ],/* I: LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */
const SKP_int pitchL[ MAX_NB_SUBFR ], /* I: Pitch lag, one for each subframe */
const SKP_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I: Inverse quantization gains, one for each subframe */
const SKP_int subfr_length, /* I: Length of each subframe */
const SKP_int nb_subfr, /* I: Number of subframes */
const SKP_int pre_length /* I: Length of the preceeding samples starting at &x[0] for each subframe */
);
/* Calculates residual energies of input subframes where all subframes have LPC_order */
/* of preceeding samples */
void SKP_Silk_residual_energy_FIX(
SKP_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
SKP_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */
const SKP_int16 x[], /* I Input signal */
const SKP_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
const SKP_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */
const SKP_int subfr_length, /* I Subframe length */
const SKP_int nb_subfr, /* I Number of subframes */
const SKP_int LPC_order /* I LPC order */
);
/* 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 */
);
/* 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 */
);
/******************/
/* 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 */
);
#ifndef FORCE_CPP_BUILD
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* FORCE_CPP_BUILD */
#endif /* SKP_SILK_MAIN_FIX_H */