1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/***********************************************************************
Copyright (c) 2006-2010, Skype Limited. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, (subject to the limitations in the disclaimer below)
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 Skype Limited, nor the names of specific
contributors, may be used to endorse or promote products derived from
this software without specific prior written permission.
NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
BY THIS LICENSE. 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.
***********************************************************************/
#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_float *pNDelta_min, /* 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[ i ] * 32768.0f );
}
ndelta_min_Q15[ LPC_order ] = ( SKP_int )SKP_float2int( pNDelta_min[ LPC_order ] * 32768.0f );
/* 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, Tilt_Q15;
SKP_int Quality_Bands_Q15[ VAD_N_BANDS ];
ret = SKP_Silk_VAD_GetSA_Q8( &psEnc->sCmn.sVAD, &SA_Q8, 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_array_of_int16_4_byte_aligned( 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_int16)SKP_SAT16( 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 ) {
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 ) {
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 );
}
}
}
|
