ref: 6f9a028cad836b8f41f479d244be849fc16e48b8
dir: /src_FIX/SKP_Silk_main_FIX.h/
/***********************************************************************
Copyright (c) 2006-2010, Skype Limited. All rights reserved.
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modification, (subject to the limitations in the disclaimer below)
are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
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documentation and/or other materials provided with the distribution.
- Neither the name of Skype Limited, nor the names of specific
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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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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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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_define_FIX.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 */
/*********************/
/* 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_int32 API_fs_Hz, /* I External (API) sampling rate (Hz) */
const SKP_int max_internal_fs_kHz,/* I Maximum internal sampling rate (kHz) */
const SKP_int PacketSize_ms, /* I Packet length (ms) */
SKP_int32 TargetRate_bps, /* I Target max bitrate (bps) (used if SNR_dB == 0) */
const SKP_int PacketLoss_perc, /* I Packet loss rate (in percent) */
const SKP_int INBandFEC_enabled, /* I Enable (1) / disable (0) inband FEC */
const SKP_int DTX_enabled, /* I Enable / disable DTX */
const SKP_int InputFramesize_ms, /* I Inputframe in ms */
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_FIX *psEncCtrl /* 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 useInterpolatedNLSFs, /* 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 */
);
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 */
);
/* Finds LTP vector from correlations */
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 */
);
/* 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 */
const SKP_int nb_subfr /* I number of subframes */
);
/******************/
/* 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)) */
);
/* LSF 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 */
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[ 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 */
);
#ifndef FORCE_CPP_BUILD
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* FORCE_CPP_BUILD */
#endif /* SKP_SILK_MAIN_FIX_H */