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27 #ifndef __PREFILTER_FIX_MIPSR1_H__
28 #define __PREFILTER_FIX_MIPSR1_H__
29
30 #ifdef HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33
34 #include "main_FIX.h"
35 #include "stack_alloc.h"
36 #include "tuning_parameters.h"
37
38 #define OVERRIDE_silk_warped_LPC_analysis_filter_FIX
silk_warped_LPC_analysis_filter_FIX(opus_int32 state[],opus_int32 res_Q2[],const opus_int16 coef_Q13[],const opus_int16 input[],const opus_int16 lambda_Q16,const opus_int length,const opus_int order,int arch)39 void silk_warped_LPC_analysis_filter_FIX(
40 opus_int32 state[], /* I/O State [order + 1] */
41 opus_int32 res_Q2[], /* O Residual signal [length] */
42 const opus_int16 coef_Q13[], /* I Coefficients [order] */
43 const opus_int16 input[], /* I Input signal [length] */
44 const opus_int16 lambda_Q16, /* I Warping factor */
45 const opus_int length, /* I Length of input signal */
46 const opus_int order, /* I Filter order (even) */
47 int arch
48 )
49 {
50 opus_int n, i;
51 opus_int32 acc_Q11, acc_Q22, tmp1, tmp2, tmp3, tmp4;
52 opus_int32 state_cur, state_next;
53
54 (void)arch;
55
56 /* Order must be even */
57 /* Length must be even */
58
59 silk_assert( ( order & 1 ) == 0 );
60 silk_assert( ( length & 1 ) == 0 );
61
62 for( n = 0; n < length; n+=2 ) {
63 /* Output of lowpass section */
64 tmp2 = silk_SMLAWB( state[ 0 ], state[ 1 ], lambda_Q16 );
65 state_cur = silk_LSHIFT( input[ n ], 14 );
66 /* Output of allpass section */
67 tmp1 = silk_SMLAWB( state[ 1 ], state[ 2 ] - tmp2, lambda_Q16 );
68 state_next = tmp2;
69 acc_Q11 = silk_RSHIFT( order, 1 );
70 acc_Q11 = silk_SMLAWB( acc_Q11, tmp2, coef_Q13[ 0 ] );
71
72
73 /* Output of lowpass section */
74 tmp4 = silk_SMLAWB( state_cur, state_next, lambda_Q16 );
75 state[ 0 ] = silk_LSHIFT( input[ n+1 ], 14 );
76 /* Output of allpass section */
77 tmp3 = silk_SMLAWB( state_next, tmp1 - tmp4, lambda_Q16 );
78 state[ 1 ] = tmp4;
79 acc_Q22 = silk_RSHIFT( order, 1 );
80 acc_Q22 = silk_SMLAWB( acc_Q22, tmp4, coef_Q13[ 0 ] );
81
82 /* Loop over allpass sections */
83 for( i = 2; i < order; i += 2 ) {
84 /* Output of allpass section */
85 tmp2 = silk_SMLAWB( state[ i ], state[ i + 1 ] - tmp1, lambda_Q16 );
86 state_cur = tmp1;
87 acc_Q11 = silk_SMLAWB( acc_Q11, tmp1, coef_Q13[ i - 1 ] );
88 /* Output of allpass section */
89 tmp1 = silk_SMLAWB( state[ i + 1 ], state[ i + 2 ] - tmp2, lambda_Q16 );
90 state_next = tmp2;
91 acc_Q11 = silk_SMLAWB( acc_Q11, tmp2, coef_Q13[ i ] );
92
93
94 /* Output of allpass section */
95 tmp4 = silk_SMLAWB( state_cur, state_next - tmp3, lambda_Q16 );
96 state[ i ] = tmp3;
97 acc_Q22 = silk_SMLAWB( acc_Q22, tmp3, coef_Q13[ i - 1 ] );
98 /* Output of allpass section */
99 tmp3 = silk_SMLAWB( state_next, tmp1 - tmp4, lambda_Q16 );
100 state[ i + 1 ] = tmp4;
101 acc_Q22 = silk_SMLAWB( acc_Q22, tmp4, coef_Q13[ i ] );
102 }
103 acc_Q11 = silk_SMLAWB( acc_Q11, tmp1, coef_Q13[ order - 1 ] );
104 res_Q2[ n ] = silk_LSHIFT( (opus_int32)input[ n ], 2 ) - silk_RSHIFT_ROUND( acc_Q11, 9 );
105
106 state[ order ] = tmp3;
107 acc_Q22 = silk_SMLAWB( acc_Q22, tmp3, coef_Q13[ order - 1 ] );
108 res_Q2[ n+1 ] = silk_LSHIFT( (opus_int32)input[ n+1 ], 2 ) - silk_RSHIFT_ROUND( acc_Q22, 9 );
109 }
110 }
111
112
113
114 /* Prefilter for finding Quantizer input signal */
115 #define OVERRIDE_silk_prefilt_FIX
silk_prefilt_FIX(silk_prefilter_state_FIX * P,opus_int32 st_res_Q12[],opus_int32 xw_Q3[],opus_int32 HarmShapeFIRPacked_Q12,opus_int Tilt_Q14,opus_int32 LF_shp_Q14,opus_int lag,opus_int length)116 static inline void silk_prefilt_FIX(
117 silk_prefilter_state_FIX *P, /* I/O state */
118 opus_int32 st_res_Q12[], /* I short term residual signal */
119 opus_int32 xw_Q3[], /* O prefiltered signal */
120 opus_int32 HarmShapeFIRPacked_Q12, /* I Harmonic shaping coeficients */
121 opus_int Tilt_Q14, /* I Tilt shaping coeficient */
122 opus_int32 LF_shp_Q14, /* I Low-frequancy shaping coeficients */
123 opus_int lag, /* I Lag for harmonic shaping */
124 opus_int length /* I Length of signals */
125 )
126 {
127 opus_int i, idx, LTP_shp_buf_idx;
128 opus_int32 n_LTP_Q12, n_Tilt_Q10, n_LF_Q10;
129 opus_int32 sLF_MA_shp_Q12, sLF_AR_shp_Q12;
130 opus_int16 *LTP_shp_buf;
131
132 /* To speed up use temp variables instead of using the struct */
133 LTP_shp_buf = P->sLTP_shp;
134 LTP_shp_buf_idx = P->sLTP_shp_buf_idx;
135 sLF_AR_shp_Q12 = P->sLF_AR_shp_Q12;
136 sLF_MA_shp_Q12 = P->sLF_MA_shp_Q12;
137
138 if( lag > 0 ) {
139 for( i = 0; i < length; i++ ) {
140 /* unrolled loop */
141 silk_assert( HARM_SHAPE_FIR_TAPS == 3 );
142 idx = lag + LTP_shp_buf_idx;
143 n_LTP_Q12 = silk_SMULBB( LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 - 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 );
144 n_LTP_Q12 = silk_SMLABT( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 ) & LTP_MASK ], HarmShapeFIRPacked_Q12 );
145 n_LTP_Q12 = silk_SMLABB( n_LTP_Q12, LTP_shp_buf[ ( idx - HARM_SHAPE_FIR_TAPS / 2 + 1) & LTP_MASK ], HarmShapeFIRPacked_Q12 );
146
147 n_Tilt_Q10 = silk_SMULWB( sLF_AR_shp_Q12, Tilt_Q14 );
148 n_LF_Q10 = silk_SMLAWB( silk_SMULWT( sLF_AR_shp_Q12, LF_shp_Q14 ), sLF_MA_shp_Q12, LF_shp_Q14 );
149
150 sLF_AR_shp_Q12 = silk_SUB32( st_res_Q12[ i ], silk_LSHIFT( n_Tilt_Q10, 2 ) );
151 sLF_MA_shp_Q12 = silk_SUB32( sLF_AR_shp_Q12, silk_LSHIFT( n_LF_Q10, 2 ) );
152
153 LTP_shp_buf_idx = ( LTP_shp_buf_idx - 1 ) & LTP_MASK;
154 LTP_shp_buf[ LTP_shp_buf_idx ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( sLF_MA_shp_Q12, 12 ) );
155
156 xw_Q3[i] = silk_RSHIFT_ROUND( silk_SUB32( sLF_MA_shp_Q12, n_LTP_Q12 ), 9 );
157 }
158 }
159 else
160 {
161 for( i = 0; i < length; i++ ) {
162
163 n_LTP_Q12 = 0;
164
165 n_Tilt_Q10 = silk_SMULWB( sLF_AR_shp_Q12, Tilt_Q14 );
166 n_LF_Q10 = silk_SMLAWB( silk_SMULWT( sLF_AR_shp_Q12, LF_shp_Q14 ), sLF_MA_shp_Q12, LF_shp_Q14 );
167
168 sLF_AR_shp_Q12 = silk_SUB32( st_res_Q12[ i ], silk_LSHIFT( n_Tilt_Q10, 2 ) );
169 sLF_MA_shp_Q12 = silk_SUB32( sLF_AR_shp_Q12, silk_LSHIFT( n_LF_Q10, 2 ) );
170
171 LTP_shp_buf_idx = ( LTP_shp_buf_idx - 1 ) & LTP_MASK;
172 LTP_shp_buf[ LTP_shp_buf_idx ] = (opus_int16)silk_SAT16( silk_RSHIFT_ROUND( sLF_MA_shp_Q12, 12 ) );
173
174 xw_Q3[i] = silk_RSHIFT_ROUND( sLF_MA_shp_Q12, 9 );
175 }
176 }
177
178 /* Copy temp variable back to state */
179 P->sLF_AR_shp_Q12 = sLF_AR_shp_Q12;
180 P->sLF_MA_shp_Q12 = sLF_MA_shp_Q12;
181 P->sLTP_shp_buf_idx = LTP_shp_buf_idx;
182 }
183
184 #endif /* __PREFILTER_FIX_MIPSR1_H__ */
185