ref: f90395ba0669dc1c2749ca671cca965cc6dcda8e
dir: /src_FIX/SKP_Silk_main_FIX.h/
/***********************************************************************
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Redistribution and use in source and binary forms, with or without
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
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of Skype Limited, nor the names of specific
contributors, may be used to endorse or promote products derived from
this software without specific prior written permission.
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
***********************************************************************/
#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) */
);
/****************/
/* 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 */