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27
28 #ifndef __WARPED_AUTOCORRELATION_FIX_MIPSR1_H__
29 #define __WARPED_AUTOCORRELATION_FIX_MIPSR1_H__
30
31 #ifdef HAVE_CONFIG_H
32 #include "config.h"
33 #endif
34
35 #include "main_FIX.h"
36
37 #undef QC
38 #define QC 10
39
40 #undef QS
41 #define QS 14
42
43 /* Autocorrelations for a warped frequency axis */
44 #define OVERRIDE_silk_warped_autocorrelation_FIX_c
silk_warped_autocorrelation_FIX_c(opus_int32 * corr,opus_int * scale,const opus_int16 * input,const opus_int warping_Q16,const opus_int length,const opus_int order)45 void silk_warped_autocorrelation_FIX_c(
46 opus_int32 *corr, /* O Result [order + 1] */
47 opus_int *scale, /* O Scaling of the correlation vector */
48 const opus_int16 *input, /* I Input data to correlate */
49 const opus_int warping_Q16, /* I Warping coefficient */
50 const opus_int length, /* I Length of input */
51 const opus_int order /* I Correlation order (even) */
52 )
53 {
54 opus_int n, i, lsh;
55 opus_int32 tmp1_QS=0, tmp2_QS=0, tmp3_QS=0, tmp4_QS=0, tmp5_QS=0, tmp6_QS=0, tmp7_QS=0, tmp8_QS=0, start_1=0, start_2=0, start_3=0;
56 opus_int32 state_QS[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
57 opus_int64 corr_QC[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 };
58 opus_int64 temp64;
59
60 opus_int32 val;
61 val = 2 * QS - QC;
62
63 /* Order must be even */
64 silk_assert( ( order & 1 ) == 0 );
65 silk_assert( 2 * QS - QC >= 0 );
66
67 /* Loop over samples */
68 for( n = 0; n < length; n=n+4 ) {
69
70 tmp1_QS = silk_LSHIFT32( (opus_int32)input[ n ], QS );
71 start_1 = tmp1_QS;
72 tmp3_QS = silk_LSHIFT32( (opus_int32)input[ n+1], QS );
73 start_2 = tmp3_QS;
74 tmp5_QS = silk_LSHIFT32( (opus_int32)input[ n+2], QS );
75 start_3 = tmp5_QS;
76 tmp7_QS = silk_LSHIFT32( (opus_int32)input[ n+3], QS );
77
78 /* Loop over allpass sections */
79 for( i = 0; i < order; i += 2 ) {
80 /* Output of allpass section */
81 tmp2_QS = silk_SMLAWB( state_QS[ i ], state_QS[ i + 1 ] - tmp1_QS, warping_Q16 );
82 corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp1_QS, start_1);
83
84 tmp4_QS = silk_SMLAWB( tmp1_QS, tmp2_QS - tmp3_QS, warping_Q16 );
85 corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp3_QS, start_2);
86
87 tmp6_QS = silk_SMLAWB( tmp3_QS, tmp4_QS - tmp5_QS, warping_Q16 );
88 corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp5_QS, start_3);
89
90 tmp8_QS = silk_SMLAWB( tmp5_QS, tmp6_QS - tmp7_QS, warping_Q16 );
91 state_QS[ i ] = tmp7_QS;
92 corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp7_QS, state_QS[0]);
93
94 /* Output of allpass section */
95 tmp1_QS = silk_SMLAWB( state_QS[ i + 1 ], state_QS[ i + 2 ] - tmp2_QS, warping_Q16 );
96 corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp2_QS, start_1);
97
98 tmp3_QS = silk_SMLAWB( tmp2_QS, tmp1_QS - tmp4_QS, warping_Q16 );
99 corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp4_QS, start_2);
100
101 tmp5_QS = silk_SMLAWB( tmp4_QS, tmp3_QS - tmp6_QS, warping_Q16 );
102 corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp6_QS, start_3);
103
104 tmp7_QS = silk_SMLAWB( tmp6_QS, tmp5_QS - tmp8_QS, warping_Q16 );
105 state_QS[ i + 1 ] = tmp8_QS;
106 corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp8_QS, state_QS[ 0 ]);
107
108 }
109 state_QS[ order ] = tmp7_QS;
110
111 corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp1_QS, start_1);
112 corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp3_QS, start_2);
113 corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp5_QS, start_3);
114 corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp7_QS, state_QS[ 0 ]);
115 }
116
117 for(;n< length; n++ ) {
118
119 tmp1_QS = silk_LSHIFT32( (opus_int32)input[ n ], QS );
120
121 /* Loop over allpass sections */
122 for( i = 0; i < order; i += 2 ) {
123
124 /* Output of allpass section */
125 tmp2_QS = silk_SMLAWB( state_QS[ i ], state_QS[ i + 1 ] - tmp1_QS, warping_Q16 );
126 state_QS[ i ] = tmp1_QS;
127 corr_QC[ i ] = __builtin_mips_madd( corr_QC[ i ], tmp1_QS, state_QS[ 0 ]);
128
129 /* Output of allpass section */
130 tmp1_QS = silk_SMLAWB( state_QS[ i + 1 ], state_QS[ i + 2 ] - tmp2_QS, warping_Q16 );
131 state_QS[ i + 1 ] = tmp2_QS;
132 corr_QC[ i+1 ] = __builtin_mips_madd( corr_QC[ i+1 ], tmp2_QS, state_QS[ 0 ]);
133 }
134 state_QS[ order ] = tmp1_QS;
135 corr_QC[ order ] = __builtin_mips_madd( corr_QC[ order ], tmp1_QS, state_QS[ 0 ]);
136 }
137
138 temp64 = corr_QC[ 0 ];
139 temp64 = __builtin_mips_shilo(temp64, val);
140
141 lsh = silk_CLZ64( temp64 ) - 35;
142 lsh = silk_LIMIT( lsh, -12 - QC, 30 - QC );
143 *scale = -( QC + lsh );
144 silk_assert( *scale >= -30 && *scale <= 12 );
145 if( lsh >= 0 ) {
146 for( i = 0; i < order + 1; i++ ) {
147 temp64 = corr_QC[ i ];
148 //temp64 = __builtin_mips_shilo(temp64, val);
149 temp64 = (val >= 0) ? (temp64 >> val) : (temp64 << -val);
150 corr[ i ] = (opus_int32)silk_CHECK_FIT32( __builtin_mips_shilo( temp64, -lsh ) );
151 }
152 } else {
153 for( i = 0; i < order + 1; i++ ) {
154 temp64 = corr_QC[ i ];
155 //temp64 = __builtin_mips_shilo(temp64, val);
156 temp64 = (val >= 0) ? (temp64 >> val) : (temp64 << -val);
157 corr[ i ] = (opus_int32)silk_CHECK_FIT32( __builtin_mips_shilo( temp64, -lsh ) );
158 }
159 }
160
161 corr_QC[ 0 ] = __builtin_mips_shilo(corr_QC[ 0 ], val);
162
163 silk_assert( corr_QC[ 0 ] >= 0 ); /* If breaking, decrease QC*/
164 }
165 #endif /* __WARPED_AUTOCORRELATION_FIX_MIPSR1_H__ */
166