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/***********************************************************************
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 SILK_MAIN_FIX_H
#define SILK_MAIN_FIX_H
#include "SigProc_FIX.h"
#include "structs_FIX.h"
#include "control.h"
#include "main.h"
#include "PLC.h"
#include "debug.h"
#include "entenc.h"
#ifndef FORCE_CPP_BUILD
#ifdef __cplusplus
extern "C"
{
#endif
#endif
#define silk_encoder_state_Fxx silk_encoder_state_FIX
#define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FIX
#define silk_encode_frame_Fxx silk_encode_frame_FIX
/*********************/
/* Encoder Functions */
/*********************/
/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
void silk_HP_variable_cutoff(
silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */
);
/* Encoder main function */
void silk_encode_do_VAD_FIX(
silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */
);
/* Encoder main function */
opus_int silk_encode_frame_FIX(
silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */
opus_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */
ec_enc *psRangeEnc, /* I/O compressor data structure */
opus_int condCoding, /* I The type of conditional coding to use */
opus_int maxBits, /* I If > 0: maximum number of output bits */
opus_int useCBR /* I Flag to force constant-bitrate operation */
);
/* Initializes the Silk encoder state */
opus_int silk_init_encoder(
silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */
);
/* Control the Silk encoder */
opus_int silk_control_encoder(
silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk encoder state */
silk_EncControlStruct *encControl, /* I: Control structure */
const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */
const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
const opus_int channelNb, /* I Channel number */
const opus_int force_fs_kHz
);
/****************/
/* Prefiltering */
/****************/
void silk_prefilter_FIX(
silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
const silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */
opus_int16 xw[], /* O Weighted signal */
const opus_int16 x[] /* I Speech signal */
);
/**************************/
/* Noise shaping analysis */
/**************************/
/* Compute noise shaping coefficients and initial gain values */
void silk_noise_shape_analysis_FIX(
silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */
silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */
const opus_int16 *pitch_res, /* I LPC residual from pitch analysis */
const opus_int16 *x /* I Input signal [ frame_length + la_shape ] */
);
/* Autocorrelations for a warped frequency axis */
void silk_warped_autocorrelation_FIX(
opus_int32 *corr, /* O Result [order + 1] */
opus_int *scale, /* O Scaling of the correlation vector */
const opus_int16 *input, /* I Input data to correlate */
const opus_int warping_Q16, /* I Warping coefficient */
const opus_int length, /* I Length of input */
const opus_int order /* I Correlation order (even) */
);
/* Calculation of LTP state scaling */
void silk_LTP_scale_ctrl_FIX(
silk_encoder_state_FIX *psEnc, /* I/O encoder state */
silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
opus_int condCoding /* I The type of conditional coding to use */
);
/**********************************************/
/* Prediction Analysis */
/**********************************************/
/* Find pitch lags */
void silk_find_pitch_lags_FIX(
silk_encoder_state_FIX *psEnc, /* I/O encoder state */
silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
opus_int16 res[], /* O residual */
const opus_int16 x[] /* I Speech signal */
);
/* Find LPC and LTP coefficients */
void silk_find_pred_coefs_FIX(
silk_encoder_state_FIX *psEnc, /* I/O encoder state */
silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
const opus_int16 res_pitch[], /* I Residual from pitch analysis */
const opus_int16 x[], /* I Speech signal */
opus_int condCoding /* I The type of conditional coding to use */
);
/* LPC analysis */
void silk_find_LPC_FIX(
opus_int16 NLSF_Q15[], /* O NLSFs */
opus_int8 *interpIndex, /* O NLSF interpolation index, only used for NLSF interpolation */
const opus_int16 prev_NLSFq_Q15[], /* I previous NLSFs, only used for NLSF interpolation */
const opus_int useInterpNLSFs, /* I Flag */
const opus_int firstFrameAfterReset, /* I Flag */
const opus_int LPC_order, /* I LPC order */
const opus_int16 x[], /* I Input signal */
const opus_int subfr_length, /* I Input signal subframe length including preceeding samples */
const opus_int nb_subfr /* I: Number of subframes */
);
/* LTP analysis */
void silk_find_LTP_FIX(
opus_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
opus_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
opus_int *LTPredCodGain_Q7, /* O LTP coding gain */
const opus_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */
const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
const opus_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */
const opus_int subfr_length, /* I subframe length */
const opus_int nb_subfr, /* I number of subframes */
const opus_int mem_offset, /* I number of samples in LTP memory */
opus_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */
);
void silk_LTP_analysis_filter_FIX(
opus_int16 *LTP_res, /* O: LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */
const opus_int16 *x, /* I: Pointer to input signal with at least max( pitchL ) preceeding samples */
const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I: LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */
const opus_int pitchL[ MAX_NB_SUBFR ], /* I: Pitch lag, one for each subframe */
const opus_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I: Inverse quantization gains, one for each subframe */
const opus_int subfr_length, /* I: Length of each subframe */
const opus_int nb_subfr, /* I: Number of subframes */
const opus_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 silk_residual_energy_FIX(
opus_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
opus_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */
const opus_int16 x[], /* I Input signal */
opus_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
const opus_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */
const opus_int subfr_length, /* I Subframe length */
const opus_int nb_subfr, /* I Number of subframes */
const opus_int LPC_order /* I LPC order */
);
/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
opus_int32 silk_residual_energy16_covar_FIX(
const opus_int16 *c, /* I Prediction vector */
const opus_int32 *wXX, /* I Correlation matrix */
const opus_int32 *wXx, /* I Correlation vector */
opus_int32 wxx, /* I Signal energy */
opus_int D, /* I Dimension */
opus_int cQ /* I Q value for c vector 0 - 15 */
);
/* Processing of gains */
void silk_process_gains_FIX(
silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */
opus_int condCoding /* I The type of conditional coding to use */
);
/******************/
/* Linear Algebra */
/******************/
/* Calculates correlation matrix X'*X */
void silk_corrMatrix_FIX(
const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
const opus_int L, /* I Length of vectors */
const opus_int order, /* I Max lag for correlation */
const opus_int head_room, /* I Desired headroom */
opus_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ]*/
opus_int *rshifts /* I/O Right shifts of correlations */
);
/* Calculates correlation vector X'*t */
void silk_corrVector_FIX(
const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
const opus_int16 *t, /* I Target vector [L] */
const opus_int L, /* I Length of vectors */
const opus_int order, /* I Max lag for correlation */
opus_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */
const opus_int rshifts /* I Right shifts of correlations */
);
/* Add noise to matrix diagonal */
void silk_regularize_correlations_FIX(
opus_int32 *XX, /* I/O Correlation matrices */
opus_int32 *xx, /* I/O Correlation values */
opus_int32 noise, /* I Noise to add */
opus_int D /* I Dimension of XX */
);
/* Solves Ax = b, assuming A is symmetric */
void silk_solve_LDL_FIX(
opus_int32 *A, /* I Pointer to symetric square matrix A */
opus_int M, /* I Size of matrix */
const opus_int32 *b, /* I Pointer to b vector */
opus_int32 *x_Q16 /* O Pointer to x solution vector */
);
#ifndef FORCE_CPP_BUILD
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* FORCE_CPP_BUILD */
#endif /* SILK_MAIN_FIX_H */
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