ref: 606cc10f2f7d76046a25fde5ec5e0a35dafdaae6
dir: /src_FLP/SKP_Silk_wrappers_FLP.c/
/***********************************************************************
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***********************************************************************/
#include "SKP_Silk_main_FLP.h"
/* Wrappers. Calls flp / fix code */
/* Convert AR filter coefficients to NLSF parameters */
void SKP_Silk_A2NLSF_FLP(
SKP_float *pNLSF, /* O NLSF vector [ LPC_order ] */
const SKP_float *pAR, /* I LPC coefficients [ LPC_order ] */
const SKP_int LPC_order /* I LPC order */
)
{
SKP_int i;
SKP_int NLSF_fix[ MAX_LPC_ORDER ];
SKP_int32 a_fix_Q16[ MAX_LPC_ORDER ];
for( i = 0; i < LPC_order; i++ ) {
a_fix_Q16[ i ] = SKP_float2int( pAR[ i ] * 65536.0f );
}
SKP_Silk_A2NLSF( NLSF_fix, a_fix_Q16, LPC_order );
for( i = 0; i < LPC_order; i++ ) {
pNLSF[ i ] = ( SKP_float )NLSF_fix[ i ] * ( 1.0f / 32768.0f );
}
}
/* Convert LSF parameters to AR prediction filter coefficients */
void SKP_Silk_NLSF2A_stable_FLP(
SKP_float *pAR, /* O LPC coefficients [ LPC_order ] */
const SKP_float *pNLSF, /* I NLSF vector [ LPC_order ] */
const SKP_int LPC_order /* I LPC order */
)
{
SKP_int i;
SKP_int NLSF_fix[ MAX_LPC_ORDER ];
SKP_int16 a_fix_Q12[ MAX_LPC_ORDER ];
for( i = 0; i < LPC_order; i++ ) {
NLSF_fix[ i ] = ( SKP_int )SKP_CHECK_FIT16( SKP_float2int( pNLSF[ i ] * 32768.0f ) );
}
SKP_Silk_NLSF2A_stable( a_fix_Q12, NLSF_fix, LPC_order );
for( i = 0; i < LPC_order; i++ ) {
pAR[ i ] = ( SKP_float )a_fix_Q12[ i ] / 4096.0f;
}
}
/* LSF stabilizer, for a single input data vector */
void SKP_Silk_NLSF_stabilize_FLP(
SKP_float *pNLSF, /* I/O (Un)stable NLSF vector [ LPC_order ] */
const SKP_int *pNDelta_min_Q15, /* I Normalized delta min vector[LPC_order+1]*/
const SKP_int LPC_order /* I LPC order */
)
{
SKP_int i;
SKP_int NLSF_Q15[ MAX_LPC_ORDER ], ndelta_min_Q15[ MAX_LPC_ORDER + 1 ];
for( i = 0; i < LPC_order; i++ ) {
NLSF_Q15[ i ] = ( SKP_int )SKP_float2int( pNLSF[ i ] * 32768.0f );
ndelta_min_Q15[ i ] = ( SKP_int )SKP_float2int( pNDelta_min_Q15[ i ] );
}
ndelta_min_Q15[ LPC_order ] = ( SKP_int )SKP_float2int( pNDelta_min_Q15[ LPC_order ] );
/* NLSF stabilizer, for a single input data vector */
SKP_Silk_NLSF_stabilize( NLSF_Q15, ndelta_min_Q15, LPC_order );
for( i = 0; i < LPC_order; i++ ) {
pNLSF[ i ] = ( SKP_float )NLSF_Q15[ i ] * ( 1.0f / 32768.0f );
}
}
/* Interpolation function with fixed point rounding */
void SKP_Silk_interpolate_wrapper_FLP(
SKP_float xi[], /* O Interpolated vector */
const SKP_float x0[], /* I First vector */
const SKP_float x1[], /* I Second vector */
const SKP_float ifact, /* I Interp. factor, weight on second vector */
const SKP_int d /* I Number of parameters */
)
{
SKP_int x0_int[ MAX_LPC_ORDER ], x1_int[ MAX_LPC_ORDER ], xi_int[ MAX_LPC_ORDER ];
SKP_int ifact_Q2 = ( SKP_int )( ifact * 4.0f );
SKP_int i;
/* Convert input from flp to fix */
for( i = 0; i < d; i++ ) {
x0_int[ i ] = SKP_float2int( x0[ i ] * 32768.0f );
x1_int[ i ] = SKP_float2int( x1[ i ] * 32768.0f );
}
/* Interpolate two vectors */
SKP_Silk_interpolate( xi_int, x0_int, x1_int, ifact_Q2, d );
/* Convert output from fix to flp */
for( i = 0; i < d; i++ ) {
xi[ i ] = ( SKP_float )xi_int[ i ] * ( 1.0f / 32768.0f );
}
}
/****************************************/
/* Floating-point Silk VAD wrapper */
/****************************************/
SKP_int SKP_Silk_VAD_FLP(
SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
const SKP_int16 *pIn /* I Input signal */
)
{
SKP_int i, ret, SA_Q8, SNR_dB_Q7, Tilt_Q15;
SKP_int Quality_Bands_Q15[ VAD_N_BANDS ];
ret = SKP_Silk_VAD_GetSA_Q8( &psEnc->sCmn.sVAD, &SA_Q8, &SNR_dB_Q7, Quality_Bands_Q15, &Tilt_Q15,
pIn, psEnc->sCmn.frame_length, psEnc->sCmn.fs_kHz );
psEnc->speech_activity = ( SKP_float )SA_Q8 / 256.0f;
for( i = 0; i < VAD_N_BANDS; i++ ) {
psEncCtrl->input_quality_bands[ i ] = ( SKP_float )Quality_Bands_Q15[ i ] / 32768.0f;
}
psEncCtrl->input_tilt = ( SKP_float )Tilt_Q15 / 32768.0f;
return ret;
}
/****************************************/
/* Floating-point Silk NSQ wrapper */
/****************************************/
void SKP_Silk_NSQ_wrapper_FLP(
SKP_Silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
SKP_Silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
const SKP_float x[], /* I Prefiltered input signal */
SKP_int8 q[], /* O Quantized pulse signal */
const SKP_int useLBRR /* I LBRR flag */
)
{
SKP_int i, j;
SKP_float tmp_float;
SKP_int16 x_16[ MAX_FRAME_LENGTH ];
/* Prediction and coding parameters */
SKP_int32 Gains_Q16[ MAX_NB_SUBFR ];
SKP_DWORD_ALIGN SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
SKP_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
SKP_int LTP_scale_Q14;
/* Noise shaping parameters */
/* Testing */
SKP_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
SKP_int32 LF_shp_Q14[ MAX_NB_SUBFR ]; /* Packs two int16 coefficients per int32 value */
SKP_int Lambda_Q10;
SKP_int Tilt_Q14[ MAX_NB_SUBFR ];
SKP_int HarmShapeGain_Q14[ MAX_NB_SUBFR ];
/* Convert control struct to fix control struct */
/* Noise shape parameters */
for( i = 0; i < MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER; i++ ) {
AR2_Q13[ i ] = SKP_float2int( psEncCtrl->AR2[ i ] * 8192.0f );
}
for( i = 0; i < MAX_NB_SUBFR; i++ ) {
LF_shp_Q14[ i ] = SKP_LSHIFT32( SKP_float2int( psEncCtrl->LF_AR_shp[ i ] * 16384.0f ), 16 ) |
(SKP_uint16)SKP_float2int( psEncCtrl->LF_MA_shp[ i ] * 16384.0f );
Tilt_Q14[ i ] = (SKP_int)SKP_float2int( psEncCtrl->Tilt[ i ] * 16384.0f );
HarmShapeGain_Q14[ i ] = (SKP_int)SKP_float2int( psEncCtrl->HarmShapeGain[ i ] * 16384.0f );
}
Lambda_Q10 = ( SKP_int )SKP_float2int( psEncCtrl->Lambda * 1024.0f );
/* prediction and coding parameters */
for( i = 0; i < MAX_NB_SUBFR * LTP_ORDER; i++ ) {
LTPCoef_Q14[ i ] = ( SKP_int16 )SKP_float2int( psEncCtrl->LTPCoef[ i ] * 16384.0f );
}
for( j = 0; j < MAX_NB_SUBFR >> 1; j++ ) {
for( i = 0; i < MAX_LPC_ORDER; i++ ) {
PredCoef_Q12[ j ][ i ] = ( SKP_int16 )SKP_float2int( psEncCtrl->PredCoef[ j ][ i ] * 4096.0f );
}
}
for( i = 0; i < MAX_NB_SUBFR; i++ ) {
tmp_float = SKP_LIMIT( ( psEncCtrl->Gains[ i ] * 65536.0f ), 2147483000.0f, -2147483000.0f );
Gains_Q16[ i ] = SKP_float2int( tmp_float );
if( psEncCtrl->Gains[ i ] > 0.0f ) {
SKP_assert( tmp_float >= 0.0f );
SKP_assert( Gains_Q16[ i ] >= 0 );
}
}
if( psEncCtrl->sCmn.sigtype == SIG_TYPE_VOICED ) {
LTP_scale_Q14 = SKP_Silk_LTPScales_table_Q14[ psEncCtrl->sCmn.LTP_scaleIndex ];
} else {
LTP_scale_Q14 = 0;
}
/* Convert input to fix */
SKP_float2short_array( x_16, x, psEnc->sCmn.frame_length );
/* Call NSQ */
if( useLBRR ) {
if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
SKP_Silk_NSQ_del_dec( &psEnc->sCmn, &psEncCtrl->sCmn, &psEnc->sNSQ_LBRR,
x_16, q, psEncCtrl->sCmn.NLSFInterpCoef_Q2, PredCoef_Q12[ 0 ], LTPCoef_Q14, AR2_Q13,
HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, Lambda_Q10, LTP_scale_Q14 );
} else {
SKP_Silk_NSQ( &psEnc->sCmn, &psEncCtrl->sCmn, &psEnc->sNSQ_LBRR,
x_16, q, psEncCtrl->sCmn.NLSFInterpCoef_Q2, PredCoef_Q12[ 0 ], LTPCoef_Q14, AR2_Q13,
HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, Lambda_Q10, LTP_scale_Q14 );
}
} else {
if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
SKP_Silk_NSQ_del_dec( &psEnc->sCmn, &psEncCtrl->sCmn, &psEnc->sNSQ,
x_16, q, psEncCtrl->sCmn.NLSFInterpCoef_Q2, PredCoef_Q12[ 0 ], LTPCoef_Q14, AR2_Q13,
HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, Lambda_Q10, LTP_scale_Q14 );
} else {
SKP_Silk_NSQ( &psEnc->sCmn, &psEncCtrl->sCmn, &psEnc->sNSQ,
x_16, q, psEncCtrl->sCmn.NLSFInterpCoef_Q2, PredCoef_Q12[ 0 ], LTPCoef_Q14, AR2_Q13,
HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, Lambda_Q10, LTP_scale_Q14 );
}
}
}
/***********************************************/
/* Floating-point Silk LTP quantiation wrapper */
/***********************************************/
void SKP_Silk_quant_LTP_gains_FLP(
SKP_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
SKP_int cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
SKP_int *periodicity_index, /* O Periodicity index */
const SKP_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Error weights */
const SKP_int mu_Q10, /* I Mu value (R/D tradeoff) */
const SKP_int lowComplexity, /* I Flag for low complexity */
const SKP_int nb_subfr /* I number of subframes */
)
{
SKP_int i;
SKP_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ];
SKP_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ];
for( i = 0; i < MAX_NB_SUBFR * LTP_ORDER; i++ ) {
B_Q14[ i ] = (SKP_int16)SKP_float2int( B[ i ] * 16384.0f );
}
for( i = 0; i < MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER; i++ ) {
W_Q18[ i ] = (SKP_int32)SKP_float2int( W[ i ] * 262144.0f );
}
SKP_Silk_quant_LTP_gains( B_Q14, cbk_index, periodicity_index, W_Q18, mu_Q10, lowComplexity, nb_subfr );
for( i = 0; i < MAX_NB_SUBFR * LTP_ORDER; i++ ) {
B[ i ] = ( (SKP_float)B_Q14[ i ] ) / 16384.0f;
}
}