Chris@69: /***********************************************************************
Chris@69: Copyright (c) 2006-2011, Skype Limited. All rights reserved.
Chris@69: Redistribution and use in source and binary forms, with or without
Chris@69: modification, are permitted provided that the following conditions
Chris@69: are met:
Chris@69: - Redistributions of source code must retain the above copyright notice,
Chris@69: this list of conditions and the following disclaimer.
Chris@69: - Redistributions in binary form must reproduce the above copyright
Chris@69: notice, this list of conditions and the following disclaimer in the
Chris@69: documentation and/or other materials provided with the distribution.
Chris@69: - Neither the name of Internet Society, IETF or IETF Trust, nor the
Chris@69: names of specific contributors, may be used to endorse or promote
Chris@69: products derived from this software without specific prior written
Chris@69: permission.
Chris@69: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
Chris@69: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
Chris@69: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
Chris@69: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
Chris@69: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
Chris@69: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
Chris@69: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
Chris@69: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
Chris@69: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
Chris@69: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
Chris@69: POSSIBILITY OF SUCH DAMAGE.
Chris@69: ***********************************************************************/
Chris@69: 
Chris@69: #ifdef HAVE_CONFIG_H
Chris@69: #include "config.h"
Chris@69: #endif
Chris@69: 
Chris@69: #include "main_FLP.h"
Chris@69: 
Chris@69: /* Wrappers. Calls flp / fix code */
Chris@69: 
Chris@69: /* Convert AR filter coefficients to NLSF parameters */
Chris@69: void silk_A2NLSF_FLP(
Chris@69:     opus_int16                      *NLSF_Q15,                          /* O    NLSF vector      [ LPC_order ]              */
Chris@69:     const silk_float                *pAR,                               /* I    LPC coefficients [ LPC_order ]              */
Chris@69:     const opus_int                  LPC_order                           /* I    LPC order                                   */
Chris@69: )
Chris@69: {
Chris@69:     opus_int   i;
Chris@69:     opus_int32 a_fix_Q16[ MAX_LPC_ORDER ];
Chris@69: 
Chris@69:     for( i = 0; i < LPC_order; i++ ) {
Chris@69:         a_fix_Q16[ i ] = silk_float2int( pAR[ i ] * 65536.0f );
Chris@69:     }
Chris@69: 
Chris@69:     silk_A2NLSF( NLSF_Q15, a_fix_Q16, LPC_order );
Chris@69: }
Chris@69: 
Chris@69: /* Convert LSF parameters to AR prediction filter coefficients */
Chris@69: void silk_NLSF2A_FLP(
Chris@69:     silk_float                      *pAR,                               /* O    LPC coefficients [ LPC_order ]              */
Chris@69:     const opus_int16                *NLSF_Q15,                          /* I    NLSF vector      [ LPC_order ]              */
Chris@69:     const opus_int                  LPC_order,                          /* I    LPC order                                   */
Chris@69:     int                             arch                                /* I    Run-time architecture                       */
Chris@69: )
Chris@69: {
Chris@69:     opus_int   i;
Chris@69:     opus_int16 a_fix_Q12[ MAX_LPC_ORDER ];
Chris@69: 
Chris@69:     silk_NLSF2A( a_fix_Q12, NLSF_Q15, LPC_order, arch );
Chris@69: 
Chris@69:     for( i = 0; i < LPC_order; i++ ) {
Chris@69:         pAR[ i ] = ( silk_float )a_fix_Q12[ i ] * ( 1.0f / 4096.0f );
Chris@69:     }
Chris@69: }
Chris@69: 
Chris@69: /******************************************/
Chris@69: /* Floating-point NLSF processing wrapper */
Chris@69: /******************************************/
Chris@69: void silk_process_NLSFs_FLP(
Chris@69:     silk_encoder_state              *psEncC,                            /* I/O  Encoder state                               */
Chris@69:     silk_float                      PredCoef[ 2 ][ MAX_LPC_ORDER ],     /* O    Prediction coefficients                     */
Chris@69:     opus_int16                      NLSF_Q15[      MAX_LPC_ORDER ],     /* I/O  Normalized LSFs (quant out) (0 - (2^15-1))  */
Chris@69:     const opus_int16                prev_NLSF_Q15[ MAX_LPC_ORDER ]      /* I    Previous Normalized LSFs (0 - (2^15-1))     */
Chris@69: )
Chris@69: {
Chris@69:     opus_int     i, j;
Chris@69:     opus_int16   PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
Chris@69: 
Chris@69:     silk_process_NLSFs( psEncC, PredCoef_Q12, NLSF_Q15, prev_NLSF_Q15);
Chris@69: 
Chris@69:     for( j = 0; j < 2; j++ ) {
Chris@69:         for( i = 0; i < psEncC->predictLPCOrder; i++ ) {
Chris@69:             PredCoef[ j ][ i ] = ( silk_float )PredCoef_Q12[ j ][ i ] * ( 1.0f / 4096.0f );
Chris@69:         }
Chris@69:     }
Chris@69: }
Chris@69: 
Chris@69: /****************************************/
Chris@69: /* Floating-point Silk NSQ wrapper      */
Chris@69: /****************************************/
Chris@69: void silk_NSQ_wrapper_FLP(
Chris@69:     silk_encoder_state_FLP          *psEnc,                             /* I/O  Encoder state FLP                           */
Chris@69:     silk_encoder_control_FLP        *psEncCtrl,                         /* I/O  Encoder control FLP                         */
Chris@69:     SideInfoIndices                 *psIndices,                         /* I/O  Quantization indices                        */
Chris@69:     silk_nsq_state                  *psNSQ,                             /* I/O  Noise Shaping Quantzation state             */
Chris@69:     opus_int8                       pulses[],                           /* O    Quantized pulse signal                      */
Chris@69:     const silk_float                x[]                                 /* I    Prefiltered input signal                    */
Chris@69: )
Chris@69: {
Chris@69:     opus_int     i, j;
Chris@69:     opus_int16   x16[ MAX_FRAME_LENGTH ];
Chris@69:     opus_int32   Gains_Q16[ MAX_NB_SUBFR ];
Chris@69:     silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
Chris@69:     opus_int16   LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
Chris@69:     opus_int     LTP_scale_Q14;
Chris@69: 
Chris@69:     /* Noise shaping parameters */
Chris@69:     opus_int16   AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
Chris@69:     opus_int32   LF_shp_Q14[ MAX_NB_SUBFR ];         /* Packs two int16 coefficients per int32 value             */
Chris@69:     opus_int     Lambda_Q10;
Chris@69:     opus_int     Tilt_Q14[ MAX_NB_SUBFR ];
Chris@69:     opus_int     HarmShapeGain_Q14[ MAX_NB_SUBFR ];
Chris@69: 
Chris@69:     /* Convert control struct to fix control struct */
Chris@69:     /* Noise shape parameters */
Chris@69:     for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
Chris@69:         for( j = 0; j < psEnc->sCmn.shapingLPCOrder; j++ ) {
Chris@69:             AR_Q13[ i * MAX_SHAPE_LPC_ORDER + j ] = silk_float2int( psEncCtrl->AR[ i * MAX_SHAPE_LPC_ORDER + j ] * 8192.0f );
Chris@69:         }
Chris@69:     }
Chris@69: 
Chris@69:     for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
Chris@69:         LF_shp_Q14[ i ] =   silk_LSHIFT32( silk_float2int( psEncCtrl->LF_AR_shp[ i ]     * 16384.0f ), 16 ) |
Chris@69:                               (opus_uint16)silk_float2int( psEncCtrl->LF_MA_shp[ i ]     * 16384.0f );
Chris@69:         Tilt_Q14[ i ]   =        (opus_int)silk_float2int( psEncCtrl->Tilt[ i ]          * 16384.0f );
Chris@69:         HarmShapeGain_Q14[ i ] = (opus_int)silk_float2int( psEncCtrl->HarmShapeGain[ i ] * 16384.0f );
Chris@69:     }
Chris@69:     Lambda_Q10 = ( opus_int )silk_float2int( psEncCtrl->Lambda * 1024.0f );
Chris@69: 
Chris@69:     /* prediction and coding parameters */
Chris@69:     for( i = 0; i < psEnc->sCmn.nb_subfr * LTP_ORDER; i++ ) {
Chris@69:         LTPCoef_Q14[ i ] = (opus_int16)silk_float2int( psEncCtrl->LTPCoef[ i ] * 16384.0f );
Chris@69:     }
Chris@69: 
Chris@69:     for( j = 0; j < 2; j++ ) {
Chris@69:         for( i = 0; i < psEnc->sCmn.predictLPCOrder; i++ ) {
Chris@69:             PredCoef_Q12[ j ][ i ] = (opus_int16)silk_float2int( psEncCtrl->PredCoef[ j ][ i ] * 4096.0f );
Chris@69:         }
Chris@69:     }
Chris@69: 
Chris@69:     for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
Chris@69:         Gains_Q16[ i ] = silk_float2int( psEncCtrl->Gains[ i ] * 65536.0f );
Chris@69:         silk_assert( Gains_Q16[ i ] > 0 );
Chris@69:     }
Chris@69: 
Chris@69:     if( psIndices->signalType == TYPE_VOICED ) {
Chris@69:         LTP_scale_Q14 = silk_LTPScales_table_Q14[ psIndices->LTP_scaleIndex ];
Chris@69:     } else {
Chris@69:         LTP_scale_Q14 = 0;
Chris@69:     }
Chris@69: 
Chris@69:     /* Convert input to fix */
Chris@69:     for( i = 0; i < psEnc->sCmn.frame_length; i++ ) {
Chris@69:         x16[ i ] = silk_float2int( x[ i ] );
Chris@69:     }
Chris@69: 
Chris@69:     /* Call NSQ */
Chris@69:     if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
Chris@69:         silk_NSQ_del_dec( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
Chris@69:             AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
Chris@69:     } else {
Chris@69:         silk_NSQ( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
Chris@69:             AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
Chris@69:     }
Chris@69: }
Chris@69: 
Chris@69: /***********************************************/
Chris@69: /* Floating-point Silk LTP quantiation wrapper */
Chris@69: /***********************************************/
Chris@69: void silk_quant_LTP_gains_FLP(
Chris@69:     silk_float                      B[ MAX_NB_SUBFR * LTP_ORDER ],      /* O    Quantized LTP gains                            */
Chris@69:     opus_int8                       cbk_index[ MAX_NB_SUBFR ],          /* O    Codebook index                              */
Chris@69:     opus_int8                       *periodicity_index,                 /* O    Periodicity index                           */
Chris@69:     opus_int32                      *sum_log_gain_Q7,                   /* I/O  Cumulative max prediction gain  */
Chris@69:     silk_float                      *pred_gain_dB,                        /* O    LTP prediction gain                            */
Chris@69:     const silk_float                XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I    Correlation matrix                    */
Chris@69:     const silk_float                xX[ MAX_NB_SUBFR * LTP_ORDER ],        /* I    Correlation vector                            */
Chris@69:     const opus_int                    subfr_len,                            /* I    Number of samples per subframe                */
Chris@69:     const opus_int                    nb_subfr,                           /* I    Number of subframes                            */
Chris@69:     int                             arch                                /* I    Run-time architecture                       */
Chris@69: )
Chris@69: {
Chris@69:     opus_int   i, pred_gain_dB_Q7;
Chris@69:     opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ];
Chris@69:     opus_int32 XX_Q17[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
Chris@69:     opus_int32 xX_Q17[ MAX_NB_SUBFR * LTP_ORDER ];
Chris@69: 
Chris@69:     for( i = 0; i < nb_subfr * LTP_ORDER * LTP_ORDER; i++ ) {
Chris@69:         XX_Q17[ i ] = (opus_int32)silk_float2int( XX[ i ] * 131072.0f );
Chris@69:     }
Chris@69:     for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
Chris@69:         xX_Q17[ i ] = (opus_int32)silk_float2int( xX[ i ] * 131072.0f );
Chris@69:     }
Chris@69: 
Chris@69:     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 );
Chris@69: 
Chris@69:     for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
Chris@69:         B[ i ] = (silk_float)B_Q14[ i ] * ( 1.0f / 16384.0f );
Chris@69:     }
Chris@69: 
Chris@69:     *pred_gain_dB = (silk_float)pred_gain_dB_Q7 * ( 1.0f / 128.0f );
Chris@69: }