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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 #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
silk_warped_autocorrelation_FIX(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(
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