ref: d3358b1d42f5092c42f45a68f1e53a16b5a6926f
dir: /silk/float/silk_wrappers_FLP.c/
/***********************************************************************
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***********************************************************************/
#include "silk_main_FLP.h"
/* Wrappers. Calls flp / fix code */
/* Convert AR filter coefficients to NLSF parameters */
void silk_A2NLSF_FLP(
SKP_int16 *NLSF_Q15, /* 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_int32 a_fix_Q16[ MAX_LPC_ORDER ];
for( i = 0; i < LPC_order; i++ ) {
a_fix_Q16[ i ] = SKP_float2int( pAR[ i ] * 65536.0f );
}
silk_A2NLSF( NLSF_Q15, a_fix_Q16, LPC_order );
}
/* Convert LSF parameters to AR prediction filter coefficients */
void silk_NLSF2A_FLP(
SKP_float *pAR, /* O LPC coefficients [ LPC_order ] */
const SKP_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
const SKP_int LPC_order /* I LPC order */
)
{
SKP_int i;
SKP_int16 a_fix_Q12[ MAX_LPC_ORDER ];
silk_NLSF2A( a_fix_Q12, NLSF_Q15, LPC_order );
for( i = 0; i < LPC_order; i++ ) {
pAR[ i ] = ( SKP_float )a_fix_Q12[ i ] * ( 1.0f / 4096.0f );
}
}
/******************************************/
/* Floating-point NLSF processing wrapper */
/******************************************/
void silk_process_NLSFs_FLP(
silk_encoder_state *psEncC, /* I/O Encoder state */
SKP_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
SKP_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
const SKP_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
)
{
SKP_int i, j;
SKP_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
silk_process_NLSFs( psEncC, PredCoef_Q12, NLSF_Q15, prev_NLSF_Q15);
for( j = 0; j < 2; j++ ) {
for( i = 0; i < psEncC->predictLPCOrder; i++ ) {
PredCoef[ j ][ i ] = ( SKP_float )PredCoef_Q12[ j ][ i ] * ( 1.0f / 4096.0f );
}
}
}
/****************************************/
/* 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 */
SKP_int8 pulses[], /* O Quantized pulse signal */
const SKP_float x[] /* I Prefiltered input signal */
)
{
SKP_int i, j;
SKP_int16 x_16[ MAX_FRAME_LENGTH ];
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 */
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 < psEnc->sCmn.nb_subfr; i++ ) {
for( j = 0; j < psEnc->sCmn.shapingLPCOrder; j++ ) {
AR2_Q13[ i * MAX_SHAPE_LPC_ORDER + j ] = SKP_float2int( psEncCtrl->AR2[ i * MAX_SHAPE_LPC_ORDER + j ] * 8192.0f );
}
}
for( i = 0; i < psEnc->sCmn.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 < psEnc->sCmn.nb_subfr * LTP_ORDER; i++ ) {
LTPCoef_Q14[ i ] = ( SKP_int16 )SKP_float2int( psEncCtrl->LTPCoef[ i ] * 16384.0f );
}
for( j = 0; j < 2; j++ ) {
for( i = 0; i < psEnc->sCmn.predictLPCOrder; i++ ) {
PredCoef_Q12[ j ][ i ] = ( SKP_int16 )SKP_float2int( psEncCtrl->PredCoef[ j ][ i ] * 4096.0f );
}
}
for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
Gains_Q16[ i ] = SKP_float2int( psEncCtrl->Gains[ i ] * 65536.0f );
SKP_assert( Gains_Q16[ i ] > 0 );
}
if( psIndices->signalType == TYPE_VOICED ) {
LTP_scale_Q14 = silk_LTPScales_table_Q14[ psIndices->LTP_scaleIndex ];
} else {
LTP_scale_Q14 = 0;
}
/* Convert input to fix */
SKP_float2short_array( x_16, x, psEnc->sCmn.frame_length );
/* Call NSQ */
if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
silk_NSQ_del_dec( &psEnc->sCmn, psNSQ, psIndices, x_16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
AR2_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14 );
} else {
silk_NSQ( &psEnc->sCmn, psNSQ, psIndices, x_16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
AR2_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14 );
}
}
/***********************************************/
/* Floating-point Silk LTP quantiation wrapper */
/***********************************************/
void silk_quant_LTP_gains_FLP(
SKP_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
SKP_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
SKP_int8 *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 < nb_subfr * LTP_ORDER; i++ ) {
B_Q14[ i ] = (SKP_int16)SKP_float2int( B[ i ] * 16384.0f );
}
for( i = 0; i < nb_subfr * LTP_ORDER * LTP_ORDER; i++ ) {
W_Q18[ i ] = (SKP_int32)SKP_float2int( W[ i ] * 262144.0f );
}
silk_quant_LTP_gains( B_Q14, cbk_index, periodicity_index, W_Q18, mu_Q10, lowComplexity, nb_subfr );
for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
B[ i ] = (SKP_float)B_Q14[ i ] * ( 1.0f / 16384.0f );
}
}