mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-12-14 22:20:58 +00:00
285 lines
19 KiB
C
285 lines
19 KiB
C
/***********************************************************************
|
|
Copyright (c) 2006-2011, Skype Limited. All rights reserved.
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, 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 Internet Society, IETF or IETF Trust, nor the
|
|
names of specific contributors, may be used to endorse or promote
|
|
products derived from this software without specific prior written
|
|
permission.
|
|
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_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_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
|
|
const opus_int channelNb, /* I Channel number */
|
|
const opus_int force_fs_kHz
|
|
);
|
|
|
|
/**************************/
|
|
/* 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 XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
|
|
silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* O Weight for LTP quantization */
|
|
const silk_float r_ptr[], /* I LPC residual */
|
|
const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
|
|
const opus_int subfr_length, /* I Subframe length */
|
|
const opus_int nb_subfr /* I number of subframes */
|
|
);
|
|
|
|
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 ], /* O 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 */
|
|
silk_float *pred_gain_dB, /* O LTP prediction gain */
|
|
const silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Correlation matrix */
|
|
const silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* I Correlation vector */
|
|
const opus_int subfr_len, /* I Number of samples per subframe */
|
|
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] */
|
|
);
|
|
|
|
/* 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 */
|
|
int arch /* I Run-time architecture */
|
|
);
|
|
|
|
/* 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
|