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Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/float/corrMatrix_FLP.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/float/corrMatrix_FLP.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/float/corrMatrix_FLP.c b/lib/rbcodec/codecs/libopus/silk/float/corrMatrix_FLP.c new file mode 100644 index 0000000000..eae6a1cfca --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/float/corrMatrix_FLP.c | |||
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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 | /********************************************************************** | ||
33 | * Correlation matrix computations for LS estimate. | ||
34 | **********************************************************************/ | ||
35 | |||
36 | #include "main_FLP.h" | ||
37 | |||
38 | /* Calculates correlation vector X'*t */ | ||
39 | void silk_corrVector_FLP( | ||
40 | const silk_float *x, /* I x vector [L+order-1] used to create X */ | ||
41 | const silk_float *t, /* I Target vector [L] */ | ||
42 | const opus_int L, /* I Length of vecors */ | ||
43 | const opus_int Order, /* I Max lag for correlation */ | ||
44 | silk_float *Xt /* O X'*t correlation vector [order] */ | ||
45 | ) | ||
46 | { | ||
47 | opus_int lag; | ||
48 | const silk_float *ptr1; | ||
49 | |||
50 | ptr1 = &x[ Order - 1 ]; /* Points to first sample of column 0 of X: X[:,0] */ | ||
51 | for( lag = 0; lag < Order; lag++ ) { | ||
52 | /* Calculate X[:,lag]'*t */ | ||
53 | Xt[ lag ] = (silk_float)silk_inner_product_FLP( ptr1, t, L ); | ||
54 | ptr1--; /* Next column of X */ | ||
55 | } | ||
56 | } | ||
57 | |||
58 | /* Calculates correlation matrix X'*X */ | ||
59 | void silk_corrMatrix_FLP( | ||
60 | const silk_float *x, /* I x vector [ L+order-1 ] used to create X */ | ||
61 | const opus_int L, /* I Length of vectors */ | ||
62 | const opus_int Order, /* I Max lag for correlation */ | ||
63 | silk_float *XX /* O X'*X correlation matrix [order x order] */ | ||
64 | ) | ||
65 | { | ||
66 | opus_int j, lag; | ||
67 | double energy; | ||
68 | const silk_float *ptr1, *ptr2; | ||
69 | |||
70 | ptr1 = &x[ Order - 1 ]; /* First sample of column 0 of X */ | ||
71 | energy = silk_energy_FLP( ptr1, L ); /* X[:,0]'*X[:,0] */ | ||
72 | matrix_ptr( XX, 0, 0, Order ) = ( silk_float )energy; | ||
73 | for( j = 1; j < Order; j++ ) { | ||
74 | /* Calculate X[:,j]'*X[:,j] */ | ||
75 | energy += ptr1[ -j ] * ptr1[ -j ] - ptr1[ L - j ] * ptr1[ L - j ]; | ||
76 | matrix_ptr( XX, j, j, Order ) = ( silk_float )energy; | ||
77 | } | ||
78 | |||
79 | ptr2 = &x[ Order - 2 ]; /* First sample of column 1 of X */ | ||
80 | for( lag = 1; lag < Order; lag++ ) { | ||
81 | /* Calculate X[:,0]'*X[:,lag] */ | ||
82 | energy = silk_inner_product_FLP( ptr1, ptr2, L ); | ||
83 | matrix_ptr( XX, lag, 0, Order ) = ( silk_float )energy; | ||
84 | matrix_ptr( XX, 0, lag, Order ) = ( silk_float )energy; | ||
85 | /* Calculate X[:,j]'*X[:,j + lag] */ | ||
86 | for( j = 1; j < ( Order - lag ); j++ ) { | ||
87 | energy += ptr1[ -j ] * ptr2[ -j ] - ptr1[ L - j ] * ptr2[ L - j ]; | ||
88 | matrix_ptr( XX, lag + j, j, Order ) = ( silk_float )energy; | ||
89 | matrix_ptr( XX, j, lag + j, Order ) = ( silk_float )energy; | ||
90 | } | ||
91 | ptr2--; /* Next column of X */ | ||
92 | } | ||
93 | } | ||