255 lines
20 KiB
C
255 lines
20 KiB
C
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/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Internet Society, IETF or IETF Trust, nor the
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names of specific contributors, may be used to endorse or promote
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products derived from this software without specific prior written
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permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS”
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifndef SILK_MAIN_FIX_H
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#define SILK_MAIN_FIX_H
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#include "SigProc_FIX.h"
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#include "structs_FIX.h"
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#include "control.h"
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#include "main.h"
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#include "PLC.h"
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#include "debug.h"
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#include "entenc.h"
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#ifndef FORCE_CPP_BUILD
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#endif
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#define silk_encoder_state_Fxx silk_encoder_state_FIX
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#define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FIX
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#define silk_encode_frame_Fxx silk_encode_frame_FIX
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/*********************/
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/* Encoder Functions */
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/*********************/
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/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
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void silk_HP_variable_cutoff(
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silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */
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);
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/* Encoder main function */
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void silk_encode_do_VAD_FIX(
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silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */
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);
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/* Encoder main function */
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opus_int silk_encode_frame_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */
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opus_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */
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ec_enc *psRangeEnc, /* I/O compressor data structure */
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opus_int condCoding, /* I The type of conditional coding to use */
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opus_int maxBits, /* I If > 0: maximum number of output bits */
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opus_int useCBR /* I Flag to force constant-bitrate operation */
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);
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/* Initializes the Silk encoder state */
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opus_int silk_init_encoder(
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silk_encoder_state_Fxx *psEnc /* I/O Pointer to Silk FIX encoder state */
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);
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/* Control the Silk encoder */
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opus_int silk_control_encoder(
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silk_encoder_state_Fxx *psEnc, /* I/O Pointer to Silk encoder state */
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silk_EncControlStruct *encControl, /* I Control structure */
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const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */
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const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
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const opus_int channelNb, /* I Channel number */
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const opus_int force_fs_kHz
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);
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/****************/
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/* Prefiltering */
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/****************/
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void silk_prefilter_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
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const silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */
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opus_int32 xw_Q10[], /* O Weighted signal */
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const opus_int16 x[] /* I Speech signal */
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);
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/**************************/
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/* Noise shaping analysis */
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/**************************/
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/* Compute noise shaping coefficients and initial gain values */
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void silk_noise_shape_analysis_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */
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silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */
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const opus_int16 *pitch_res, /* I LPC residual from pitch analysis */
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const opus_int16 *x /* I Input signal [ frame_length + la_shape ] */
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);
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/* Autocorrelations for a warped frequency axis */
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void silk_warped_autocorrelation_FIX(
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opus_int32 *corr, /* O Result [order + 1] */
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opus_int *scale, /* O Scaling of the correlation vector */
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const opus_int16 *input, /* I Input data to correlate */
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const opus_int warping_Q16, /* I Warping coefficient */
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const opus_int length, /* I Length of input */
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const opus_int order /* I Correlation order (even) */
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);
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/* Calculation of LTP state scaling */
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void silk_LTP_scale_ctrl_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O encoder state */
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silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/**********************************************/
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/* Prediction Analysis */
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/**********************************************/
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/* Find pitch lags */
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void silk_find_pitch_lags_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O encoder state */
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silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
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opus_int16 res[], /* O residual */
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const opus_int16 x[] /* I Speech signal */
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);
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/* Find LPC and LTP coefficients */
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void silk_find_pred_coefs_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O encoder state */
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silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
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const opus_int16 res_pitch[], /* I Residual from pitch analysis */
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const opus_int16 x[], /* I Speech signal */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/* LPC analysis */
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void silk_find_LPC_FIX(
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silk_encoder_state *psEncC, /* I/O Encoder state */
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opus_int16 NLSF_Q15[], /* O NLSFs */
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const opus_int16 x[], /* I Input signal */
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const opus_int32 minInvGain_Q30 /* I Inverse of max prediction gain */
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);
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/* LTP analysis */
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void silk_find_LTP_FIX(
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opus_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
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opus_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
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opus_int *LTPredCodGain_Q7, /* O LTP coding gain */
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const opus_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */
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const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
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const opus_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */
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const opus_int subfr_length, /* I subframe length */
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const opus_int nb_subfr, /* I number of subframes */
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const opus_int mem_offset, /* I number of samples in LTP memory */
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opus_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */
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);
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void silk_LTP_analysis_filter_FIX(
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opus_int16 *LTP_res, /* O LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */
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const opus_int16 *x, /* I Pointer to input signal with at least max( pitchL ) preceding samples */
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const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */
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const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag, one for each subframe */
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const opus_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I Inverse quantization gains, one for each subframe */
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const opus_int subfr_length, /* I Length of each subframe */
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const opus_int nb_subfr, /* I Number of subframes */
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const opus_int pre_length /* I Length of the preceding samples starting at &x[0] for each subframe */
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);
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/* Calculates residual energies of input subframes where all subframes have LPC_order */
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/* of preceding samples */
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void silk_residual_energy_FIX(
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opus_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
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opus_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */
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const opus_int16 x[], /* I Input signal */
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opus_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
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const opus_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */
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const opus_int subfr_length, /* I Subframe length */
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const opus_int nb_subfr, /* I Number of subframes */
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const opus_int LPC_order /* I LPC order */
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);
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/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
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opus_int32 silk_residual_energy16_covar_FIX(
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const opus_int16 *c, /* I Prediction vector */
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const opus_int32 *wXX, /* I Correlation matrix */
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const opus_int32 *wXx, /* I Correlation vector */
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opus_int32 wxx, /* I Signal energy */
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opus_int D, /* I Dimension */
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opus_int cQ /* I Q value for c vector 0 - 15 */
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);
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/* Processing of gains */
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void silk_process_gains_FIX(
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silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
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silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */
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opus_int condCoding /* I The type of conditional coding to use */
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);
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/******************/
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/* Linear Algebra */
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/******************/
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/* Calculates correlation matrix X'*X */
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void silk_corrMatrix_FIX(
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const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
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const opus_int L, /* I Length of vectors */
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const opus_int order, /* I Max lag for correlation */
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const opus_int head_room, /* I Desired headroom */
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opus_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ] */
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opus_int *rshifts /* I/O Right shifts of correlations */
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);
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/* Calculates correlation vector X'*t */
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void silk_corrVector_FIX(
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const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
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const opus_int16 *t, /* I Target vector [L] */
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const opus_int L, /* I Length of vectors */
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const opus_int order, /* I Max lag for correlation */
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opus_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */
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const opus_int rshifts /* I Right shifts of correlations */
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);
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/* Add noise to matrix diagonal */
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void silk_regularize_correlations_FIX(
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opus_int32 *XX, /* I/O Correlation matrices */
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opus_int32 *xx, /* I/O Correlation values */
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opus_int32 noise, /* I Noise to add */
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opus_int D /* I Dimension of XX */
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);
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/* Solves Ax = b, assuming A is symmetric */
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void silk_solve_LDL_FIX(
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opus_int32 *A, /* I Pointer to symetric square matrix A */
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opus_int M, /* I Size of matrix */
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const opus_int32 *b, /* I Pointer to b vector */
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opus_int32 *x_Q16 /* O Pointer to x solution vector */
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);
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#ifndef FORCE_CPP_BUILD
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* FORCE_CPP_BUILD */
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#endif /* SILK_MAIN_FIX_H */
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