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author | William Wilgus <me.theuser@yahoo.com> | 2019-01-04 02:01:18 -0600 |
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committer | Solomon Peachy <pizza@shaftnet.org> | 2021-04-23 14:23:04 +0000 |
commit | 14c6bb798d6bebc80f07e863236adbaf8d156a9c (patch) | |
tree | 551a4b641906c2626af844fa3239c1b2b1ff0ad3 /lib/rbcodec/codecs/libopus/silk/fixed/warped_autocorrelation_FIX.c | |
parent | 75d93937965ec4df70d37df6d4feea04577c996b (diff) | |
download | rockbox-14c6bb798d6bebc80f07e863236adbaf8d156a9c.tar.gz rockbox-14c6bb798d6bebc80f07e863236adbaf8d156a9c.zip |
Sync opus codec to upstream git
Change-Id: I0cfcc0005c4ad7bfbb1aaf454188ce70fb043dc1
Diffstat (limited to 'lib/rbcodec/codecs/libopus/silk/fixed/warped_autocorrelation_FIX.c')
-rw-r--r-- | lib/rbcodec/codecs/libopus/silk/fixed/warped_autocorrelation_FIX.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libopus/silk/fixed/warped_autocorrelation_FIX.c b/lib/rbcodec/codecs/libopus/silk/fixed/warped_autocorrelation_FIX.c new file mode 100644 index 0000000000..52002a1118 --- /dev/null +++ b/lib/rbcodec/codecs/libopus/silk/fixed/warped_autocorrelation_FIX.c | |||
@@ -0,0 +1,90 @@ | |||
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 | #if defined(MIPSr1_ASM) | ||
35 | #include "mips/warped_autocorrelation_FIX_mipsr1.h" | ||
36 | #endif | ||
37 | |||
38 | |||
39 | /* Autocorrelations for a warped frequency axis */ | ||
40 | void silk_warped_autocorrelation_FIX_c( | ||
41 | opus_int32 *corr, /* O Result [order + 1] */ | ||
42 | opus_int *scale, /* O Scaling of the correlation vector */ | ||
43 | const opus_int16 *input, /* I Input data to correlate */ | ||
44 | const opus_int warping_Q16, /* I Warping coefficient */ | ||
45 | const opus_int length, /* I Length of input */ | ||
46 | const opus_int order /* I Correlation order (even) */ | ||
47 | ) | ||
48 | { | ||
49 | opus_int n, i, lsh; | ||
50 | opus_int32 tmp1_QS, tmp2_QS; | ||
51 | opus_int32 state_QS[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 }; | ||
52 | opus_int64 corr_QC[ MAX_SHAPE_LPC_ORDER + 1 ] = { 0 }; | ||
53 | |||
54 | /* Order must be even */ | ||
55 | celt_assert( ( order & 1 ) == 0 ); | ||
56 | silk_assert( 2 * QS - QC >= 0 ); | ||
57 | |||
58 | /* Loop over samples */ | ||
59 | for( n = 0; n < length; n++ ) { | ||
60 | tmp1_QS = silk_LSHIFT32( (opus_int32)input[ n ], QS ); | ||
61 | /* Loop over allpass sections */ | ||
62 | for( i = 0; i < order; i += 2 ) { | ||
63 | /* Output of allpass section */ | ||
64 | tmp2_QS = silk_SMLAWB( state_QS[ i ], state_QS[ i + 1 ] - tmp1_QS, warping_Q16 ); | ||
65 | state_QS[ i ] = tmp1_QS; | ||
66 | corr_QC[ i ] += silk_RSHIFT64( silk_SMULL( tmp1_QS, state_QS[ 0 ] ), 2 * QS - QC ); | ||
67 | /* Output of allpass section */ | ||
68 | tmp1_QS = silk_SMLAWB( state_QS[ i + 1 ], state_QS[ i + 2 ] - tmp2_QS, warping_Q16 ); | ||
69 | state_QS[ i + 1 ] = tmp2_QS; | ||
70 | corr_QC[ i + 1 ] += silk_RSHIFT64( silk_SMULL( tmp2_QS, state_QS[ 0 ] ), 2 * QS - QC ); | ||
71 | } | ||
72 | state_QS[ order ] = tmp1_QS; | ||
73 | corr_QC[ order ] += silk_RSHIFT64( silk_SMULL( tmp1_QS, state_QS[ 0 ] ), 2 * QS - QC ); | ||
74 | } | ||
75 | |||
76 | lsh = silk_CLZ64( corr_QC[ 0 ] ) - 35; | ||
77 | lsh = silk_LIMIT( lsh, -12 - QC, 30 - QC ); | ||
78 | *scale = -( QC + lsh ); | ||
79 | silk_assert( *scale >= -30 && *scale <= 12 ); | ||
80 | if( lsh >= 0 ) { | ||
81 | for( i = 0; i < order + 1; i++ ) { | ||
82 | corr[ i ] = (opus_int32)silk_CHECK_FIT32( silk_LSHIFT64( corr_QC[ i ], lsh ) ); | ||
83 | } | ||
84 | } else { | ||
85 | for( i = 0; i < order + 1; i++ ) { | ||
86 | corr[ i ] = (opus_int32)silk_CHECK_FIT32( silk_RSHIFT64( corr_QC[ i ], -lsh ) ); | ||
87 | } | ||
88 | } | ||
89 | silk_assert( corr_QC[ 0 ] >= 0 ); /* If breaking, decrease QC*/ | ||
90 | } | ||