207 lines
10 KiB
C
207 lines
10 KiB
C
/***********************************************************************
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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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "main_FLP.h"
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/* Wrappers. Calls flp / fix code */
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/* Convert AR filter coefficients to NLSF parameters */
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void silk_A2NLSF_FLP(
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opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */
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const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */
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const opus_int LPC_order /* I LPC order */
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)
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{
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opus_int i;
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opus_int32 a_fix_Q16[ MAX_LPC_ORDER ];
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for( i = 0; i < LPC_order; i++ ) {
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a_fix_Q16[ i ] = silk_float2int( pAR[ i ] * 65536.0f );
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}
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silk_A2NLSF( NLSF_Q15, a_fix_Q16, LPC_order );
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}
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/* Convert LSF parameters to AR prediction filter coefficients */
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void silk_NLSF2A_FLP(
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silk_float *pAR, /* O LPC coefficients [ LPC_order ] */
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const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
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const opus_int LPC_order, /* I LPC order */
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int arch /* I Run-time architecture */
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)
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{
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opus_int i;
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opus_int16 a_fix_Q12[ MAX_LPC_ORDER ];
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silk_NLSF2A( a_fix_Q12, NLSF_Q15, LPC_order, arch );
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for( i = 0; i < LPC_order; i++ ) {
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pAR[ i ] = ( silk_float )a_fix_Q12[ i ] * ( 1.0f / 4096.0f );
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}
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}
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/******************************************/
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/* Floating-point NLSF processing wrapper */
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/******************************************/
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void silk_process_NLSFs_FLP(
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silk_encoder_state *psEncC, /* I/O Encoder state */
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silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
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opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
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const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
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)
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{
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opus_int i, j;
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opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
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silk_process_NLSFs( psEncC, PredCoef_Q12, NLSF_Q15, prev_NLSF_Q15);
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for( j = 0; j < 2; j++ ) {
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for( i = 0; i < psEncC->predictLPCOrder; i++ ) {
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PredCoef[ j ][ i ] = ( silk_float )PredCoef_Q12[ j ][ i ] * ( 1.0f / 4096.0f );
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}
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}
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}
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/****************************************/
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/* Floating-point Silk NSQ wrapper */
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/****************************************/
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void silk_NSQ_wrapper_FLP(
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silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
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silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
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SideInfoIndices *psIndices, /* I/O Quantization indices */
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silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */
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opus_int8 pulses[], /* O Quantized pulse signal */
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const silk_float x[] /* I Prefiltered input signal */
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)
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{
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opus_int i, j;
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opus_int16 x16[ MAX_FRAME_LENGTH ];
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opus_int32 Gains_Q16[ MAX_NB_SUBFR ];
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silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
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opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
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opus_int LTP_scale_Q14;
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/* Noise shaping parameters */
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opus_int16 AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
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opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ]; /* Packs two int16 coefficients per int32 value */
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opus_int Lambda_Q10;
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opus_int Tilt_Q14[ MAX_NB_SUBFR ];
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opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ];
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/* Convert control struct to fix control struct */
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/* Noise shape parameters */
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for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
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for( j = 0; j < psEnc->sCmn.shapingLPCOrder; j++ ) {
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AR_Q13[ i * MAX_SHAPE_LPC_ORDER + j ] = silk_float2int( psEncCtrl->AR[ i * MAX_SHAPE_LPC_ORDER + j ] * 8192.0f );
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}
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}
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for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
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LF_shp_Q14[ i ] = silk_LSHIFT32( silk_float2int( psEncCtrl->LF_AR_shp[ i ] * 16384.0f ), 16 ) |
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(opus_uint16)silk_float2int( psEncCtrl->LF_MA_shp[ i ] * 16384.0f );
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Tilt_Q14[ i ] = (opus_int)silk_float2int( psEncCtrl->Tilt[ i ] * 16384.0f );
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HarmShapeGain_Q14[ i ] = (opus_int)silk_float2int( psEncCtrl->HarmShapeGain[ i ] * 16384.0f );
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}
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Lambda_Q10 = ( opus_int )silk_float2int( psEncCtrl->Lambda * 1024.0f );
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/* prediction and coding parameters */
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for( i = 0; i < psEnc->sCmn.nb_subfr * LTP_ORDER; i++ ) {
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LTPCoef_Q14[ i ] = (opus_int16)silk_float2int( psEncCtrl->LTPCoef[ i ] * 16384.0f );
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}
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for( j = 0; j < 2; j++ ) {
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for( i = 0; i < psEnc->sCmn.predictLPCOrder; i++ ) {
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PredCoef_Q12[ j ][ i ] = (opus_int16)silk_float2int( psEncCtrl->PredCoef[ j ][ i ] * 4096.0f );
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}
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}
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for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
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Gains_Q16[ i ] = silk_float2int( psEncCtrl->Gains[ i ] * 65536.0f );
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silk_assert( Gains_Q16[ i ] > 0 );
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}
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if( psIndices->signalType == TYPE_VOICED ) {
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LTP_scale_Q14 = silk_LTPScales_table_Q14[ psIndices->LTP_scaleIndex ];
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} else {
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LTP_scale_Q14 = 0;
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}
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/* Convert input to fix */
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for( i = 0; i < psEnc->sCmn.frame_length; i++ ) {
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x16[ i ] = silk_float2int( x[ i ] );
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}
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/* Call NSQ */
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if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
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silk_NSQ_del_dec( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
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AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
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} else {
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silk_NSQ( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
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AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
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}
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}
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/***********************************************/
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/* Floating-point Silk LTP quantiation wrapper */
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/***********************************************/
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void silk_quant_LTP_gains_FLP(
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silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */
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opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
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opus_int8 *periodicity_index, /* O Periodicity index */
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opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */
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silk_float *pred_gain_dB, /* O LTP prediction gain */
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const silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Correlation matrix */
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const silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* I Correlation vector */
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const opus_int subfr_len, /* I Number of samples per subframe */
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const opus_int nb_subfr, /* I Number of subframes */
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int arch /* I Run-time architecture */
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)
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{
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opus_int i, pred_gain_dB_Q7;
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opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ];
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opus_int32 XX_Q17[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
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opus_int32 xX_Q17[ MAX_NB_SUBFR * LTP_ORDER ];
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for( i = 0; i < nb_subfr * LTP_ORDER * LTP_ORDER; i++ ) {
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XX_Q17[ i ] = (opus_int32)silk_float2int( XX[ i ] * 131072.0f );
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}
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for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
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xX_Q17[ i ] = (opus_int32)silk_float2int( xX[ i ] * 131072.0f );
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}
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silk_quant_LTP_gains( B_Q14, cbk_index, periodicity_index, sum_log_gain_Q7, &pred_gain_dB_Q7, XX_Q17, xX_Q17, subfr_len, nb_subfr, arch );
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for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
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B[ i ] = (silk_float)B_Q14[ i ] * ( 1.0f / 16384.0f );
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}
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*pred_gain_dB = (silk_float)pred_gain_dB_Q7 * ( 1.0f / 128.0f );
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}
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