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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_FIX.h" | |
33 #include "stack_alloc.h" | |
34 #include "tuning_parameters.h" | |
35 | |
36 #if defined(MIPSr1_ASM) | |
37 #include "mips/prefilter_FIX_mipsr1.h" | |
38 #endif | |
39 | |
40 | |
41 #if !defined(OVERRIDE_silk_warped_LPC_analysis_filter_FIX) | |
42 #define silk_warped_LPC_analysis_filter_FIX(state, res_Q2, coef_Q13, input, lamb
da_Q16, length, order, arch) \ | |
43 ((void)(arch),silk_warped_LPC_analysis_filter_FIX_c(state, res_Q2, coef_Q13,
input, lambda_Q16, length, order)) | |
44 #endif | |
45 | |
46 /* Prefilter for finding Quantizer input signal */ | |
47 static OPUS_INLINE void silk_prefilt_FIX( | |
48 silk_prefilter_state_FIX *P, /* I/O state
*/ | |
49 opus_int32 st_res_Q12[], /* I short term r
esidual signal */ | |
50 opus_int32 xw_Q3[], /* O prefiltered
signal */ | |
51 opus_int32 HarmShapeFIRPacked_Q12, /* I Harmonic sha
ping coeficients */ | |
52 opus_int Tilt_Q14, /* I Tilt shaping
coeficient */ | |
53 opus_int32 LF_shp_Q14, /* I Low-frequanc
y shaping coeficients */ | |
54 opus_int lag, /* I Lag for harm
onic shaping */ | |
55 opus_int length /* I Length of si
gnals */ | |
56 ); | |
57 | |
58 void silk_warped_LPC_analysis_filter_FIX_c( | |
59 opus_int32 state[], /* I/O State [order
+ 1] */ | |
60 opus_int32 res_Q2[], /* O Residual sig
nal [length] */ | |
61 const opus_int16 coef_Q13[], /* I Coefficients
[order] */ | |
62 const opus_int16 input[], /* I Input signal
[length] */ | |
63 const opus_int16 lambda_Q16, /* I Warping fact
or */ | |
64 const opus_int length, /* I Length of in
put signal */ | |
65 const opus_int order /* I Filter order
(even) */ | |
66 ) | |
67 { | |
68 opus_int n, i; | |
69 opus_int32 acc_Q11, tmp1, tmp2; | |
70 | |
71 /* Order must be even */ | |
72 silk_assert( ( order & 1 ) == 0 ); | |
73 | |
74 for( n = 0; n < length; n++ ) { | |
75 /* Output of lowpass section */ | |
76 tmp2 = silk_SMLAWB( state[ 0 ], state[ 1 ], lambda_Q16 ); | |
77 state[ 0 ] = silk_LSHIFT( input[ n ], 14 ); | |
78 /* Output of allpass section */ | |
79 tmp1 = silk_SMLAWB( state[ 1 ], state[ 2 ] - tmp2, lambda_Q16 ); | |
80 state[ 1 ] = tmp2; | |
81 acc_Q11 = silk_RSHIFT( order, 1 ); | |
82 acc_Q11 = silk_SMLAWB( acc_Q11, tmp2, coef_Q13[ 0 ] ); | |
83 /* Loop over allpass sections */ | |
84 for( i = 2; i < order; i += 2 ) { | |
85 /* Output of allpass section */ | |
86 tmp2 = silk_SMLAWB( state[ i ], state[ i + 1 ] - tmp1, lambda_Q16 ); | |
87 state[ i ] = tmp1; | |
88 acc_Q11 = silk_SMLAWB( acc_Q11, tmp1, coef_Q13[ i - 1 ] ); | |
89 /* Output of allpass section */ | |
90 tmp1 = silk_SMLAWB( state[ i + 1 ], state[ i + 2 ] - tmp2, lambda_Q1
6 ); | |
91 state[ i + 1 ] = tmp2; | |
92 acc_Q11 = silk_SMLAWB( acc_Q11, tmp2, coef_Q13[ i ] ); | |
93 } | |
94 state[ order ] = tmp1; | |
95 acc_Q11 = silk_SMLAWB( acc_Q11, tmp1, coef_Q13[ order - 1 ] ); | |
96 res_Q2[ n ] = silk_LSHIFT( (opus_int32)input[ n ], 2 ) - silk_RSHIFT_ROU
ND( acc_Q11, 9 ); | |
97 } | |
98 } | |
99 | |
100 void silk_prefilter_FIX( | |
101 silk_encoder_state_FIX *psEnc, /* I
/O Encoder state
*/ | |
102 const silk_encoder_control_FIX *psEncCtrl, /* I
Encoder control
*/ | |
103 opus_int32 xw_Q3[], /* O
Weighted signal
*/ | |
104 const opus_int16 x[] /* I
Speech signal
*/ | |
105 ) | |
106 { | |
107 silk_prefilter_state_FIX *P = &psEnc->sPrefilt; | |
108 opus_int j, k, lag; | |
109 opus_int32 tmp_32; | |
110 const opus_int16 *AR1_shp_Q13; | |
111 const opus_int16 *px; | |
112 opus_int32 *pxw_Q3; | |
113 opus_int HarmShapeGain_Q12, Tilt_Q14; | |
114 opus_int32 HarmShapeFIRPacked_Q12, LF_shp_Q14; | |
115 VARDECL( opus_int32, x_filt_Q12 ); | |
116 VARDECL( opus_int32, st_res_Q2 ); | |
117 opus_int16 B_Q10[ 2 ]; | |
118 SAVE_STACK; | |
119 | |
120 /* Set up pointers */ | |
121 px = x; | |
122 pxw_Q3 = xw_Q3; | |
123 lag = P->lagPrev; | |
124 ALLOC( x_filt_Q12, psEnc->sCmn.subfr_length, opus_int32 ); | |
125 ALLOC( st_res_Q2, psEnc->sCmn.subfr_length, opus_int32 ); | |
126 for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) { | |
127 /* Update Variables that change per sub frame */ | |
128 if( psEnc->sCmn.indices.signalType == TYPE_VOICED ) { | |
129 lag = psEncCtrl->pitchL[ k ]; | |
130 } | |
131 | |
132 /* Noise shape parameters */ | |
133 HarmShapeGain_Q12 = silk_SMULWB( (opus_int32)psEncCtrl->HarmShapeGain_Q1
4[ k ], 16384 - psEncCtrl->HarmBoost_Q14[ k ] ); | |
134 silk_assert( HarmShapeGain_Q12 >= 0 ); | |
135 HarmShapeFIRPacked_Q12 = silk_RSHIFT( HarmShap
eGain_Q12, 2 ); | |
136 HarmShapeFIRPacked_Q12 |= silk_LSHIFT( (opus_int32)silk_RSHIFT( HarmShap
eGain_Q12, 1 ), 16 ); | |
137 Tilt_Q14 = psEncCtrl->Tilt_Q14[ k ]; | |
138 LF_shp_Q14 = psEncCtrl->LF_shp_Q14[ k ]; | |
139 AR1_shp_Q13 = &psEncCtrl->AR1_Q13[ k * MAX_SHAPE_LPC_ORDER ]; | |
140 | |
141 /* Short term FIR filtering*/ | |
142 silk_warped_LPC_analysis_filter_FIX( P->sAR_shp, st_res_Q2, AR1_shp_Q13,
px, | |
143 psEnc->sCmn.warping_Q16, psEnc->sCmn.subfr_length, psEnc->sCmn.shapi
ngLPCOrder, psEnc->sCmn.arch ); | |
144 | |
145 /* Reduce (mainly) low frequencies during harmonic emphasis */ | |
146 B_Q10[ 0 ] = silk_RSHIFT_ROUND( psEncCtrl->GainsPre_Q14[ k ], 4 ); | |
147 tmp_32 = silk_SMLABB( SILK_FIX_CONST( INPUT_TILT, 26 ), psEncCtrl->HarmB
oost_Q14[ k ], HarmShapeGain_Q12 ); /* Q26 */ | |
148 tmp_32 = silk_SMLABB( tmp_32, psEncCtrl->coding_quality_Q14, SILK_FIX_CO
NST( HIGH_RATE_INPUT_TILT, 12 ) ); /* Q26 */ | |
149 tmp_32 = silk_SMULWB( tmp_32, -psEncCtrl->GainsPre_Q14[ k ] );
/* Q24 */ | |
150 tmp_32 = silk_RSHIFT_ROUND( tmp_32, 14 );
/* Q10 */ | |
151 B_Q10[ 1 ]= silk_SAT16( tmp_32 ); | |
152 x_filt_Q12[ 0 ] = silk_MLA( silk_MUL( st_res_Q2[ 0 ], B_Q10[ 0 ] ), P->s
HarmHP_Q2, B_Q10[ 1 ] ); | |
153 for( j = 1; j < psEnc->sCmn.subfr_length; j++ ) { | |
154 x_filt_Q12[ j ] = silk_MLA( silk_MUL( st_res_Q2[ j ], B_Q10[ 0 ] ),
st_res_Q2[ j - 1 ], B_Q10[ 1 ] ); | |
155 } | |
156 P->sHarmHP_Q2 = st_res_Q2[ psEnc->sCmn.subfr_length - 1 ]; | |
157 | |
158 silk_prefilt_FIX( P, x_filt_Q12, pxw_Q3, HarmShapeFIRPacked_Q12, Tilt_Q1
4, LF_shp_Q14, lag, psEnc->sCmn.subfr_length ); | |
159 | |
160 px += psEnc->sCmn.subfr_length; | |
161 pxw_Q3 += psEnc->sCmn.subfr_length; | |
162 } | |
163 | |
164 P->lagPrev = psEncCtrl->pitchL[ psEnc->sCmn.nb_subfr - 1 ]; | |
165 RESTORE_STACK; | |
166 } | |
167 | |
168 #ifndef OVERRIDE_silk_prefilt_FIX | |
169 /* Prefilter for finding Quantizer input signal */ | |
170 static OPUS_INLINE void silk_prefilt_FIX( | |
171 silk_prefilter_state_FIX *P, /* I/O state
*/ | |
172 opus_int32 st_res_Q12[], /* I short term r
esidual signal */ | |
173 opus_int32 xw_Q3[], /* O prefiltered
signal */ | |
174 opus_int32 HarmShapeFIRPacked_Q12, /* I Harmonic sha
ping coeficients */ | |
175 opus_int Tilt_Q14, /* I Tilt shaping
coeficient */ | |
176 opus_int32 LF_shp_Q14, /* I Low-frequanc
y shaping coeficients */ | |
177 opus_int lag, /* I Lag for harm
onic shaping */ | |
178 opus_int length /* I Length of si
gnals */ | |
179 ) | |
180 { | |
181 opus_int i, idx, LTP_shp_buf_idx; | |
182 opus_int32 n_LTP_Q12, n_Tilt_Q10, n_LF_Q10; | |
183 opus_int32 sLF_MA_shp_Q12, sLF_AR_shp_Q12; | |
184 opus_int16 *LTP_shp_buf; | |
185 | |
186 /* To speed up use temp variables instead of using the struct */ | |
187 LTP_shp_buf = P->sLTP_shp; | |
188 LTP_shp_buf_idx = P->sLTP_shp_buf_idx; | |
189 sLF_AR_shp_Q12 = P->sLF_AR_shp_Q12; | |
190 sLF_MA_shp_Q12 = P->sLF_MA_shp_Q12; | |
191 | |
192 for( i = 0; i < length; i++ ) { | |
193 if( lag > 0 ) { | |
194 /* unrolled loop */ | |
195 silk_assert( HARM_SHAPE_FIR_TAPS == 3 ); | |
196 idx = lag + LTP_shp_buf_idx; | |
197 n_LTP_Q12 = silk_SMULBB( LTP_shp_buf[ ( idx - HARM_SHAPE_
FIR_TAPS / 2 - 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 ); | |
198 n_LTP_Q12 = silk_SMLABT( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_
FIR_TAPS / 2 ) & LTP_MASK ], HarmShapeFIRPacked_Q12 ); | |
199 n_LTP_Q12 = silk_SMLABB( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_
FIR_TAPS / 2 + 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 ); | |
200 } else { | |
201 n_LTP_Q12 = 0; | |
202 } | |
203 | |
204 n_Tilt_Q10 = silk_SMULWB( sLF_AR_shp_Q12, Tilt_Q14 ); | |
205 n_LF_Q10 = silk_SMLAWB( silk_SMULWT( sLF_AR_shp_Q12, LF_shp_Q14 ), sLF
_MA_shp_Q12, LF_shp_Q14 ); | |
206 | |
207 sLF_AR_shp_Q12 = silk_SUB32( st_res_Q12[ i ], silk_LSHIFT( n_Tilt_Q10, 2
) ); | |
208 sLF_MA_shp_Q12 = silk_SUB32( sLF_AR_shp_Q12, silk_LSHIFT( n_LF_Q10, 2
) ); | |
209 | |
210 LTP_shp_buf_idx = ( LTP_shp_buf_idx - 1 ) & LTP_MASK; | |
211 LTP_shp_buf[ LTP_shp_buf_idx ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROU
ND( sLF_MA_shp_Q12, 12 ) ); | |
212 | |
213 xw_Q3[i] = silk_RSHIFT_ROUND( silk_SUB32( sLF_MA_shp_Q12, n_LTP_Q12 ), 9
); | |
214 } | |
215 | |
216 /* Copy temp variable back to state */ | |
217 P->sLF_AR_shp_Q12 = sLF_AR_shp_Q12; | |
218 P->sLF_MA_shp_Q12 = sLF_MA_shp_Q12; | |
219 P->sLTP_shp_buf_idx = LTP_shp_buf_idx; | |
220 } | |
221 #endif /* OVERRIDE_silk_prefilt_FIX */ | |
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