ref: fc0276fad4ca6aa4b83230329f9fe5ad8b60a621
dir: /silk/float/main_FLP.h/
/***********************************************************************
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are met:
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- Redistributions in binary form must reproduce the above copyright
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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***********************************************************************/
#ifndef SILK_MAIN_FLP_H
#define SILK_MAIN_FLP_H
#include "SigProc_FLP.h"
#include "SigProc_FIX.h"
#include "structs_FLP.h"
#include "main.h"
#include "define.h"
#include "debug.h"
#include "entenc.h"
#ifdef __cplusplus
extern "C"
{
#endif
#define silk_encoder_state_Fxx silk_encoder_state_FLP
#define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FLP
#define silk_encode_frame_Fxx silk_encode_frame_FLP
/*********************/
/* 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_FLP(
silk_encoder_state_FLP *psEnc /* I/O Encoder state FLP */
);
/* Encoder main function */
opus_int silk_encode_frame_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
opus_int32 *pnBytesOut, /* O 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_FLP *psEnc, /* I/O Encoder state FLP */
int arch /* I Run-tim architecture */
);
/* Control the Silk encoder */
opus_int silk_control_encoder(
silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */
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_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
const silk_encoder_control_FLP *psEncCtrl, /* I Encoder control FLP */
silk_float xw[], /* O Weighted signal */
const silk_float x[] /* I Speech signal */
);
/**************************/
/* Noise shaping analysis */
/**************************/
/* Compute noise shaping coefficients and initial gain values */
void silk_noise_shape_analysis_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
const silk_float *pitch_res, /* I LPC residual from pitch analysis */
const silk_float *x /* I Input signal [frame_length + la_shape] */
);
/* Autocorrelations for a warped frequency axis */
void silk_warped_autocorrelation_FLP(
silk_float *corr, /* O Result [order + 1] */
const silk_float *input, /* I Input data to correlate */
const silk_float warping, /* 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_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
opus_int condCoding /* I The type of conditional coding to use */
);
/**********************************************/
/* Prediction Analysis */
/**********************************************/
/* Find pitch lags */
void silk_find_pitch_lags_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
silk_float res[], /* O Residual */
const silk_float x[], /* I Speech signal */
int arch /* I Run-time architecture */
);
/* Find LPC and LTP coefficients */
void silk_find_pred_coefs_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
const silk_float res_pitch[], /* I Residual from pitch analysis */
const silk_float x[], /* I Speech signal */
opus_int condCoding /* I The type of conditional coding to use */
);
/* LPC analysis */
void silk_find_LPC_FLP(
silk_encoder_state *psEncC, /* I/O Encoder state */
opus_int16 NLSF_Q15[], /* O NLSFs */
const silk_float x[], /* I Input signal */
const silk_float minInvGain /* I Prediction gain from LTP (dB) */
);
/* LTP analysis */
void silk_find_LTP_FLP(
silk_float b[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
silk_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
silk_float *LTPredCodGain, /* O LTP coding gain */
const silk_float r_lpc[], /* I LPC residual */
const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
const silk_float Wght[ 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 */
);
void silk_LTP_analysis_filter_FLP(
silk_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */
const silk_float *x, /* I Input signal, with preceding samples */
const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */
const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
const silk_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */
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 Preceding samples for each subframe */
);
/* Calculates residual energies of input subframes where all subframes have LPC_order */
/* of preceding samples */
void silk_residual_energy_FLP(
silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
const silk_float x[], /* I Input signal */
silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
const silk_float gains[], /* 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 */
);
/* 16th order LPC analysis filter */
void silk_LPC_analysis_filter_FLP(
silk_float r_LPC[], /* O LPC residual signal */
const silk_float PredCoef[], /* I LPC coefficients */
const silk_float s[], /* I Input signal */
const opus_int length, /* I Length of input signal */
const opus_int Order /* I LPC order */
);
/* LTP tap quantizer */
void silk_quant_LTP_gains_FLP(
silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
opus_int8 *periodicity_index, /* O Periodicity index */
opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */
const silk_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Error weights */
const opus_int mu_Q10, /* I Mu value (R/D tradeoff) */
const opus_int lowComplexity, /* I Flag for low complexity */
const opus_int nb_subfr, /* I number of subframes */
int arch /* I Run-time architecture */
);
/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */
const silk_float *c, /* I Filter coefficients */
silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */
const silk_float *wXx, /* I Weighted correlation vector */
const silk_float wxx, /* I Weighted correlation value */
const opus_int D /* I Dimension */
);
/* Processing of gains */
void silk_process_gains_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
opus_int condCoding /* I The type of conditional coding to use */
);
/******************/
/* Linear Algebra */
/******************/
/* Calculates correlation matrix X'*X */
void silk_corrMatrix_FLP(
const silk_float *x, /* I x vector [ L+order-1 ] used to create X */
const opus_int L, /* I Length of vectors */
const opus_int Order, /* I Max lag for correlation */
silk_float *XX /* O X'*X correlation matrix [order x order] */
);
/* Calculates correlation vector X'*t */
void silk_corrVector_FLP(
const silk_float *x, /* I x vector [L+order-1] used to create X */
const silk_float *t, /* I Target vector [L] */
const opus_int L, /* I Length of vecors */
const opus_int Order, /* I Max lag for correlation */
silk_float *Xt /* O X'*t correlation vector [order] */
);
/* Add noise to matrix diagonal */
void silk_regularize_correlations_FLP(
silk_float *XX, /* I/O Correlation matrices */
silk_float *xx, /* I/O Correlation values */
const silk_float noise, /* I Noise energy to add */
const opus_int D /* I Dimension of XX */
);
/* Function to solve linear equation Ax = b, where A is an MxM symmetric matrix */
void silk_solve_LDL_FLP(
silk_float *A, /* I/O Symmetric square matrix, out: reg. */
const opus_int M, /* I Size of matrix */
const silk_float *b, /* I Pointer to b vector */
silk_float *x /* O Pointer to x solution vector */
);
/* Apply sine window to signal vector. */
/* Window types: */
/* 1 -> sine window from 0 to pi/2 */
/* 2 -> sine window from pi/2 to pi */
void silk_apply_sine_window_FLP(
silk_float px_win[], /* O Pointer to windowed signal */
const silk_float px[], /* I Pointer to input signal */
const opus_int win_type, /* I Selects a window type */
const opus_int length /* I Window length, multiple of 4 */
);
/* Wrapper functions. Call flp / fix code */
/* Convert AR filter coefficients to NLSF parameters */
void silk_A2NLSF_FLP(
opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */
const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */
const opus_int LPC_order /* I LPC order */
);
/* Convert NLSF parameters to AR prediction filter coefficients */
void silk_NLSF2A_FLP(
silk_float *pAR, /* O LPC coefficients [ LPC_order ] */
const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
const opus_int LPC_order /* I LPC order */
);
/* Limit, stabilize, and quantize NLSFs */
void silk_process_NLSFs_FLP(
silk_encoder_state *psEncC, /* I/O Encoder state */
silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
);
/* Floating-point Silk NSQ wrapper */
void silk_NSQ_wrapper_FLP(
silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
SideInfoIndices *psIndices, /* I/O Quantization indices */
silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */
opus_int8 pulses[], /* O Quantized pulse signal */
const silk_float x[] /* I Prefiltered input signal */
);
#ifdef __cplusplus
}
#endif
#endif