/src/opus/silk/float/wrappers_FLP.c

Source
/***********************************************************************
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.
***********************************************************************/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "main_FLP.h"

/* Wrappers. Calls 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                                   */
)
{
    opus_int   i;
    opus_int32 a_fix_Q16[ MAX_LPC_ORDER ];

    for( i = 0; i < LPC_order; i++ ) {
        a_fix_Q16[ i ] = silk_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(
    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                       */
)
{
    opus_int   i;
    opus_int16 a_fix_Q12[ MAX_LPC_ORDER ];

    silk_NLSF2A( a_fix_Q12, NLSF_Q15, LPC_order, arch );

    for( i = 0; i < LPC_order; i++ ) {
        pAR[ i ] = ( silk_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                               */
    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))     */
)
{
    opus_int     i, j;
    opus_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 ] = ( silk_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             */
    opus_int8                       pulses[],                           /* O    Quantized pulse signal                      */
    const silk_float                x[]                                 /* I    Prefiltered input signal                    */
)
{
    opus_int     i, j;
    opus_int16   x16[ MAX_FRAME_LENGTH ];
    opus_int32   Gains_Q16[ MAX_NB_SUBFR ];
    silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
    opus_int16   LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
    opus_int     LTP_scale_Q14;

    /* Noise shaping parameters */
    opus_int16   AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
    opus_int32   LF_shp_Q14[ MAX_NB_SUBFR ];         /* Packs two int16 coefficients per int32 value             */
    opus_int     Lambda_Q10;
    opus_int     Tilt_Q14[ MAX_NB_SUBFR ];
    opus_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++ ) {
            AR_Q13[ i * MAX_SHAPE_LPC_ORDER + j ] = silk_float2int( psEncCtrl->AR[ i * MAX_SHAPE_LPC_ORDER + j ] * 8192.0f );
        }
    }

    for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
        LF_shp_Q14[ i ] =   silk_LSHIFT32( silk_float2int( psEncCtrl->LF_AR_shp[ i ]     * 16384.0f ), 16 ) |
                              (opus_uint16)silk_float2int( psEncCtrl->LF_MA_shp[ i ]     * 16384.0f );
        Tilt_Q14[ i ]   =        (opus_int)silk_float2int( psEncCtrl->Tilt[ i ]          * 16384.0f );
        HarmShapeGain_Q14[ i ] = (opus_int)silk_float2int( psEncCtrl->HarmShapeGain[ i ] * 16384.0f );
    }
    Lambda_Q10 = ( opus_int )silk_float2int( psEncCtrl->Lambda * 1024.0f );

    /* prediction and coding parameters */
    for( i = 0; i < psEnc->sCmn.nb_subfr * LTP_ORDER; i++ ) {
        LTPCoef_Q14[ i ] = (opus_int16)silk_float2int( psEncCtrl->LTPCoef[ i ] * 16384.0f );
    }

    for( j = 0; j < 2; j++ ) {
        for( i = 0; i < psEnc->sCmn.predictLPCOrder; i++ ) {
            PredCoef_Q12[ j ][ i ] = (opus_int16)silk_float2int( psEncCtrl->PredCoef[ j ][ i ] * 4096.0f );
        }
    }

    for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
        Gains_Q16[ i ] = silk_float2int( psEncCtrl->Gains[ i ] * 65536.0f );
        silk_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 */
    for( i = 0; i < psEnc->sCmn.frame_length; i++ ) {
        x16[ i ] = silk_float2int( x[ i ] );
    }

    /* Call NSQ */
    if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) {
        silk_NSQ_del_dec( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
            AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
    } else {
        silk_NSQ( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
            AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
    }
}

/***********************************************/
/* Floating-point Silk LTP quantiation wrapper */
/***********************************************/
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                       */
)
{
    opus_int   i, pred_gain_dB_Q7;
    opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ];
    opus_int32 XX_Q17[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
    opus_int32 xX_Q17[ MAX_NB_SUBFR * LTP_ORDER ];

    i = 0;
    do {
        XX_Q17[ i ] = (opus_int32)silk_float2int( XX[ i ] * 131072.0f );
    } while ( ++i < nb_subfr * LTP_ORDER * LTP_ORDER );
    i = 0;
    do {
        xX_Q17[ i ] = (opus_int32)silk_float2int( xX[ i ] * 131072.0f );
    } while ( ++i < nb_subfr * LTP_ORDER );

    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 );

    for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
        B[ i ] = (silk_float)B_Q14[ i ] * ( 1.0f / 16384.0f );
    }

    *pred_gain_dB = (silk_float)pred_gain_dB_Q7 * ( 1.0f / 128.0f );
}

Coverage Report

Created: 2025-10-10 07:38

Line	Count	Source
1		/***********************************************************************
2		Copyright (c) 2006-2011, Skype Limited. All rights reserved.
3		Redistribution and use in source and binary forms, with or without
4		modification, are permitted provided that the following conditions
5		are met:
6		- Redistributions of source code must retain the above copyright notice,
7		this list of conditions and the following disclaimer.
8		- Redistributions in binary form must reproduce the above copyright
9		notice, this list of conditions and the following disclaimer in the
10		documentation and/or other materials provided with the distribution.
11		- Neither the name of Internet Society, IETF or IETF Trust, nor the
12		names of specific contributors, may be used to endorse or promote
13		products derived from this software without specific prior written
14		permission.
15		THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16		AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17		IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18		ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19		LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20		CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21		SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22		INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23		CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24		ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25		POSSIBILITY OF SUCH DAMAGE.
26		***********************************************************************/
27
28		#ifdef HAVE_CONFIG_H
29		#include "config.h"
30		#endif
31
32		#include "main_FLP.h"
33
34		/* Wrappers. Calls flp / fix code */
35
36		/* Convert AR filter coefficients to NLSF parameters */
37		void silk_A2NLSF_FLP(
38		opus_int16 NLSF_Q15, / O NLSF vector [ LPC_order ] */
39		const silk_float pAR, / I LPC coefficients [ LPC_order ] */
40		const opus_int LPC_order /* I LPC order */
41		)
42	292k	{
43	292k	opus_int i;
44	292k	opus_int32 a_fix_Q16[ MAX_LPC_ORDER ];
45
46	3.59M	for( i = 0; i < LPC_order; i++ ) {
47	3.30M	a_fix_Q16[ i ] = silk_float2int( pAR[ i ] * 65536.0f );
48	3.30M	}
49
50	292k	silk_A2NLSF( NLSF_Q15, a_fix_Q16, LPC_order );
51	292k	}
52
53		/* Convert LSF parameters to AR prediction filter coefficients */
54		void silk_NLSF2A_FLP(
55		silk_float pAR, / O LPC coefficients [ LPC_order ] */
56		const opus_int16 NLSF_Q15, / I NLSF vector [ LPC_order ] */
57		const opus_int LPC_order, /* I LPC order */
58		int arch /* I Run-time architecture */
59		)
60	232k	{
61	232k	opus_int i;
62	232k	opus_int16 a_fix_Q12[ MAX_LPC_ORDER ];
63
64	232k	silk_NLSF2A( a_fix_Q12, NLSF_Q15, LPC_order, arch );
65
66	2.92M	for( i = 0; i < LPC_order; i++ ) {
67	2.69M	pAR[ i ] = ( silk_float )a_fix_Q12[ i ] * ( 1.0f / 4096.0f );
68	2.69M	}
69	232k	}
70
71		/******************************************/
72		/* Floating-point NLSF processing wrapper */
73		/******************************************/
74		void silk_process_NLSFs_FLP(
75		silk_encoder_state psEncC, / I/O Encoder state */
76		silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
77		opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
78		const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
79		)
80	238k	{
81	238k	opus_int i, j;
82	238k	opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
83
84	238k	silk_process_NLSFs( psEncC, PredCoef_Q12, NLSF_Q15, prev_NLSF_Q15);
85
86	715k	for( j = 0; j < 2; j++ ) {
87	5.83M	for( i = 0; i < psEncC->predictLPCOrder; i++ ) {
88	5.35M	PredCoef[ j ][ i ] = ( silk_float )PredCoef_Q12[ j ][ i ] * ( 1.0f / 4096.0f );
89	5.35M	}
90	477k	}
91	238k	}
92
93		/****************************************/
94		/* Floating-point Silk NSQ wrapper */
95		/****************************************/
96		void silk_NSQ_wrapper_FLP(
97		silk_encoder_state_FLP psEnc, / I/O Encoder state FLP */
98		silk_encoder_control_FLP psEncCtrl, / I/O Encoder control FLP */
99		SideInfoIndices psIndices, / I/O Quantization indices */
100		silk_nsq_state psNSQ, / I/O Noise Shaping Quantzation state */
101		opus_int8 pulses[], /* O Quantized pulse signal */
102		const silk_float x[] /* I Prefiltered input signal */
103		)
104	755k	{
105	755k	opus_int i, j;
106	755k	opus_int16 x16[ MAX_FRAME_LENGTH ];
107	755k	opus_int32 Gains_Q16[ MAX_NB_SUBFR ];
108	755k	silk_DWORD_ALIGN opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ];
109	755k	opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ];
110	755k	opus_int LTP_scale_Q14;
111
112		/* Noise shaping parameters */
113	755k	opus_int16 AR_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
114	755k	opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ]; /* Packs two int16 coefficients per int32 value */
115	755k	opus_int Lambda_Q10;
116	755k	opus_int Tilt_Q14[ MAX_NB_SUBFR ];
117	755k	opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ];
118
119		/* Convert control struct to fix control struct */
120		/* Noise shape parameters */
121	3.32M	for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
122	49.2M	for( j = 0; j < psEnc->sCmn.shapingLPCOrder; j++ ) {
123	46.6M	AR_Q13[ i * MAX_SHAPE_LPC_ORDER + j ] = silk_float2int( psEncCtrl->AR[ i * MAX_SHAPE_LPC_ORDER + j ] * 8192.0f );
124	46.6M	}
125	2.57M	}
126
127	3.32M	for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
128	2.57M	LF_shp_Q14[ i ] = silk_LSHIFT32( silk_float2int( psEncCtrl->LF_AR_shp[ i ] * 16384.0f ), 16 ) \|
129	2.57M	(opus_uint16)silk_float2int( psEncCtrl->LF_MA_shp[ i ] * 16384.0f );
130	2.57M	Tilt_Q14[ i ] = (opus_int)silk_float2int( psEncCtrl->Tilt[ i ] * 16384.0f );
131	2.57M	HarmShapeGain_Q14[ i ] = (opus_int)silk_float2int( psEncCtrl->HarmShapeGain[ i ] * 16384.0f );
132	2.57M	}
133	755k	Lambda_Q10 = ( opus_int )silk_float2int( psEncCtrl->Lambda * 1024.0f );
134
135		/* prediction and coding parameters */
136	13.6M	for( i = 0; i < psEnc->sCmn.nb_subfr * LTP_ORDER; i++ ) {
137	12.8M	LTPCoef_Q14[ i ] = (opus_int16)silk_float2int( psEncCtrl->LTPCoef[ i ] * 16384.0f );
138	12.8M	}
139
140	2.26M	for( j = 0; j < 2; j++ ) {
141	18.1M	for( i = 0; i < psEnc->sCmn.predictLPCOrder; i++ ) {
142	16.6M	PredCoef_Q12[ j ][ i ] = (opus_int16)silk_float2int( psEncCtrl->PredCoef[ j ][ i ] * 4096.0f );
143	16.6M	}
144	1.51M	}
145
146	3.32M	for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
147	2.57M	Gains_Q16[ i ] = silk_float2int( psEncCtrl->Gains[ i ] * 65536.0f );
148	2.57M	silk_assert( Gains_Q16[ i ] > 0 );
149	2.57M	}
150
151	755k	if( psIndices->signalType == TYPE_VOICED ) {
152	150k	LTP_scale_Q14 = silk_LTPScales_table_Q14[ psIndices->LTP_scaleIndex ];
153	605k	} else {
154	605k	LTP_scale_Q14 = 0;
155	605k	}
156
157		/* Convert input to fix */
158	128M	for( i = 0; i < psEnc->sCmn.frame_length; i++ ) {
159	127M	x16[ i ] = silk_float2int( x[ i ] );
160	127M	}
161
162		/* Call NSQ */
163	755k	if( psEnc->sCmn.nStatesDelayedDecision > 1 \|\| psEnc->sCmn.warping_Q16 > 0 ) {
164	577k	silk_NSQ_del_dec( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
165	577k	AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
166	577k	} else {
167	178k	silk_NSQ( &psEnc->sCmn, psNSQ, psIndices, x16, pulses, PredCoef_Q12[ 0 ], LTPCoef_Q14,
168	178k	AR_Q13, HarmShapeGain_Q14, Tilt_Q14, LF_shp_Q14, Gains_Q16, psEncCtrl->pitchL, Lambda_Q10, LTP_scale_Q14, psEnc->sCmn.arch );
169	178k	}
170	755k	}
171
172		/***********************************************/
173		/* Floating-point Silk LTP quantiation wrapper */
174		/***********************************************/
175		void silk_quant_LTP_gains_FLP(
176		silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */
177		opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
178		opus_int8 periodicity_index, / O Periodicity index */
179		opus_int32 sum_log_gain_Q7, / I/O Cumulative max prediction gain */
180		silk_float pred_gain_dB, / O LTP prediction gain */
181		const silk_float XX[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Correlation matrix */
182		const silk_float xX[ MAX_NB_SUBFR * LTP_ORDER ], /* I Correlation vector */
183		const opus_int subfr_len, /* I Number of samples per subframe */
184		const opus_int nb_subfr, /* I Number of subframes */
185		int arch /* I Run-time architecture */
186		)
187	32.7k	{
188	32.7k	opus_int i, pred_gain_dB_Q7;
189	32.7k	opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ];
190	32.7k	opus_int32 XX_Q17[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ];
191	32.7k	opus_int32 xX_Q17[ MAX_NB_SUBFR * LTP_ORDER ];
192
193	32.7k	i = 0;
194	3.27M	do {
195	3.27M	XX_Q17[ i ] = (opus_int32)silk_float2int( XX[ i ] * 131072.0f );
196	3.27M	} while ( ++i < nb_subfr * LTP_ORDER * LTP_ORDER );
197	32.7k	i = 0;
198	654k	do {
199	654k	xX_Q17[ i ] = (opus_int32)silk_float2int( xX[ i ] * 131072.0f );
200	654k	} while ( ++i < nb_subfr * LTP_ORDER );
201
202	32.7k	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 );
203
204	686k	for( i = 0; i < nb_subfr * LTP_ORDER; i++ ) {
205	654k	B[ i ] = (silk_float)B_Q14[ i ] * ( 1.0f / 16384.0f );
206	654k	}
207
208	32.7k	pred_gain_dB = (silk_float)pred_gain_dB_Q7 ( 1.0f / 128.0f );
209	32.7k	}