diff options
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/fixed/residual_energy16_FIX.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/fixed/residual_energy16_FIX.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/fixed/residual_energy16_FIX.c b/lib/rbcodec/codecs/libopus/silk/fixed/residual_energy16_FIX.c new file mode 100644 index 0000000000..7f130f3d3d --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/fixed/residual_energy16_FIX.c | |||
@@ -0,0 +1,103 @@ | |||
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 | |||
34 | /* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */ | ||
35 | opus_int32 silk_residual_energy16_covar_FIX( | ||
36 | const opus_int16 *c, /* I Prediction vector */ | ||
37 | const opus_int32 *wXX, /* I Correlation matrix */ | ||
38 | const opus_int32 *wXx, /* I Correlation vector */ | ||
39 | opus_int32 wxx, /* I Signal energy */ | ||
40 | opus_int D, /* I Dimension */ | ||
41 | opus_int cQ /* I Q value for c vector 0 - 15 */ | ||
42 | ) | ||
43 | { | ||
44 | opus_int i, j, lshifts, Qxtra; | ||
45 | opus_int32 c_max, w_max, tmp, tmp2, nrg; | ||
46 | opus_int cn[ MAX_MATRIX_SIZE ]; | ||
47 | const opus_int32 *pRow; | ||
48 | |||
49 | /* Safety checks */ | ||
50 | celt_assert( D >= 0 ); | ||
51 | celt_assert( D <= 16 ); | ||
52 | celt_assert( cQ > 0 ); | ||
53 | celt_assert( cQ < 16 ); | ||
54 | |||
55 | lshifts = 16 - cQ; | ||
56 | Qxtra = lshifts; | ||
57 | |||
58 | c_max = 0; | ||
59 | for( i = 0; i < D; i++ ) { | ||
60 | c_max = silk_max_32( c_max, silk_abs( (opus_int32)c[ i ] ) ); | ||
61 | } | ||
62 | Qxtra = silk_min_int( Qxtra, silk_CLZ32( c_max ) - 17 ); | ||
63 | |||
64 | w_max = silk_max_32( wXX[ 0 ], wXX[ D * D - 1 ] ); | ||
65 | Qxtra = silk_min_int( Qxtra, silk_CLZ32( silk_MUL( D, silk_RSHIFT( silk_SMULWB( w_max, c_max ), 4 ) ) ) - 5 ); | ||
66 | Qxtra = silk_max_int( Qxtra, 0 ); | ||
67 | for( i = 0; i < D; i++ ) { | ||
68 | cn[ i ] = silk_LSHIFT( ( opus_int )c[ i ], Qxtra ); | ||
69 | silk_assert( silk_abs(cn[i]) <= ( silk_int16_MAX + 1 ) ); /* Check that silk_SMLAWB can be used */ | ||
70 | } | ||
71 | lshifts -= Qxtra; | ||
72 | |||
73 | /* Compute wxx - 2 * wXx * c */ | ||
74 | tmp = 0; | ||
75 | for( i = 0; i < D; i++ ) { | ||
76 | tmp = silk_SMLAWB( tmp, wXx[ i ], cn[ i ] ); | ||
77 | } | ||
78 | nrg = silk_RSHIFT( wxx, 1 + lshifts ) - tmp; /* Q: -lshifts - 1 */ | ||
79 | |||
80 | /* Add c' * wXX * c, assuming wXX is symmetric */ | ||
81 | tmp2 = 0; | ||
82 | for( i = 0; i < D; i++ ) { | ||
83 | tmp = 0; | ||
84 | pRow = &wXX[ i * D ]; | ||
85 | for( j = i + 1; j < D; j++ ) { | ||
86 | tmp = silk_SMLAWB( tmp, pRow[ j ], cn[ j ] ); | ||
87 | } | ||
88 | tmp = silk_SMLAWB( tmp, silk_RSHIFT( pRow[ i ], 1 ), cn[ i ] ); | ||
89 | tmp2 = silk_SMLAWB( tmp2, tmp, cn[ i ] ); | ||
90 | } | ||
91 | nrg = silk_ADD_LSHIFT32( nrg, tmp2, lshifts ); /* Q: -lshifts - 1 */ | ||
92 | |||
93 | /* Keep one bit free always, because we add them for LSF interpolation */ | ||
94 | if( nrg < 1 ) { | ||
95 | nrg = 1; | ||
96 | } else if( nrg > silk_RSHIFT( silk_int32_MAX, lshifts + 2 ) ) { | ||
97 | nrg = silk_int32_MAX >> 1; | ||
98 | } else { | ||
99 | nrg = silk_LSHIFT( nrg, lshifts + 1 ); /* Q0 */ | ||
100 | } | ||
101 | return nrg; | ||
102 | |||
103 | } | ||