Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(133)

Side by Side Diff: silk/Inlines.h

Issue 107243004: Updating Opus to release 1.1 (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/opus
Patch Set: Created 7 years ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch | Annotate | Revision Log
« no previous file with comments | « silk/CNG.c ('k') | silk/LP_variable_cutoff.c » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
1 /*********************************************************************** 1 /***********************************************************************
2 Copyright (c) 2006-2011, Skype Limited. All rights reserved. 2 Copyright (c) 2006-2011, Skype Limited. All rights reserved.
3 Redistribution and use in source and binary forms, with or without 3 Redistribution and use in source and binary forms, with or without
4 modification, are permitted provided that the following conditions 4 modification, are permitted provided that the following conditions
5 are met: 5 are met:
6 - Redistributions of source code must retain the above copyright notice, 6 - Redistributions of source code must retain the above copyright notice,
7 this list of conditions and the following disclaimer. 7 this list of conditions and the following disclaimer.
8 - Redistributions in binary form must reproduce the above copyright 8 - Redistributions in binary form must reproduce the above copyright
9 notice, this list of conditions and the following disclaimer in the 9 notice, this list of conditions and the following disclaimer in the
10 documentation and/or other materials provided with the distribution. 10 documentation and/or other materials provided with the distribution.
11 - Neither the name of Internet Society, IETF or IETF Trust, nor the 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 12 names of specific contributors, may be used to endorse or promote
13 products derived from this software without specific prior written 13 products derived from this software without specific prior written
14 permission. 14 permission.
15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 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 16 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 18 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 19 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 20 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 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 22 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 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 24 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 POSSIBILITY OF SUCH DAMAGE. 25 POSSIBILITY OF SUCH DAMAGE.
26 ***********************************************************************/ 26 ***********************************************************************/
27 27
28 /*! \file silk_Inlines.h 28 /*! \file silk_Inlines.h
29 * \brief silk_Inlines.h defines inline signal processing functions. 29 * \brief silk_Inlines.h defines OPUS_INLINE signal processing functions.
30 */ 30 */
31 31
32 #ifndef SILK_FIX_INLINES_H 32 #ifndef SILK_FIX_INLINES_H
33 #define SILK_FIX_INLINES_H 33 #define SILK_FIX_INLINES_H
34 34
35 #ifdef __cplusplus 35 #ifdef __cplusplus
36 extern "C" 36 extern "C"
37 { 37 {
38 #endif 38 #endif
39 39
40 /* count leading zeros of opus_int64 */ 40 /* count leading zeros of opus_int64 */
41 static inline opus_int32 silk_CLZ64( opus_int64 in ) 41 static OPUS_INLINE opus_int32 silk_CLZ64( opus_int64 in )
42 { 42 {
43 opus_int32 in_upper; 43 opus_int32 in_upper;
44 44
45 in_upper = (opus_int32)silk_RSHIFT64(in, 32); 45 in_upper = (opus_int32)silk_RSHIFT64(in, 32);
46 if (in_upper == 0) { 46 if (in_upper == 0) {
47 /* Search in the lower 32 bits */ 47 /* Search in the lower 32 bits */
48 return 32 + silk_CLZ32( (opus_int32) in ); 48 return 32 + silk_CLZ32( (opus_int32) in );
49 } else { 49 } else {
50 /* Search in the upper 32 bits */ 50 /* Search in the upper 32 bits */
51 return silk_CLZ32( in_upper ); 51 return silk_CLZ32( in_upper );
52 } 52 }
53 } 53 }
54 54
55 /* get number of leading zeros and fractional part (the bits right after the lea ding one */ 55 /* get number of leading zeros and fractional part (the bits right after the lea ding one */
56 static inline void silk_CLZ_FRAC( 56 static OPUS_INLINE void silk_CLZ_FRAC(
57 opus_int32 in, /* I input */ 57 opus_int32 in, /* I input */
58 opus_int32 *lz, /* O number of leading zeros */ 58 opus_int32 *lz, /* O number of leading zeros */
59 opus_int32 *frac_Q7 /* O the 7 bits right after the leading one */ 59 opus_int32 *frac_Q7 /* O the 7 bits right after the leading one */
60 ) 60 )
61 { 61 {
62 opus_int32 lzeros = silk_CLZ32(in); 62 opus_int32 lzeros = silk_CLZ32(in);
63 63
64 * lz = lzeros; 64 * lz = lzeros;
65 * frac_Q7 = silk_ROR32(in, 24 - lzeros) & 0x7f; 65 * frac_Q7 = silk_ROR32(in, 24 - lzeros) & 0x7f;
66 } 66 }
67 67
68 /* Approximation of square root */ 68 /* Approximation of square root */
69 /* Accuracy: < +/- 10% for output values > 15 */ 69 /* Accuracy: < +/- 10% for output values > 15 */
70 /* < +/- 2.5% for output values > 120 */ 70 /* < +/- 2.5% for output values > 120 */
71 static inline opus_int32 silk_SQRT_APPROX( opus_int32 x ) 71 static OPUS_INLINE opus_int32 silk_SQRT_APPROX( opus_int32 x )
72 { 72 {
73 opus_int32 y, lz, frac_Q7; 73 opus_int32 y, lz, frac_Q7;
74 74
75 if( x <= 0 ) { 75 if( x <= 0 ) {
76 return 0; 76 return 0;
77 } 77 }
78 78
79 silk_CLZ_FRAC(x, &lz, &frac_Q7); 79 silk_CLZ_FRAC(x, &lz, &frac_Q7);
80 80
81 if( lz & 1 ) { 81 if( lz & 1 ) {
82 y = 32768; 82 y = 32768;
83 } else { 83 } else {
84 y = 46214; /* 46214 = sqrt(2) * 32768 */ 84 y = 46214; /* 46214 = sqrt(2) * 32768 */
85 } 85 }
86 86
87 /* get scaling right */ 87 /* get scaling right */
88 y >>= silk_RSHIFT(lz, 1); 88 y >>= silk_RSHIFT(lz, 1);
89 89
90 /* increment using fractional part of input */ 90 /* increment using fractional part of input */
91 y = silk_SMLAWB(y, y, silk_SMULBB(213, frac_Q7)); 91 y = silk_SMLAWB(y, y, silk_SMULBB(213, frac_Q7));
92 92
93 return y; 93 return y;
94 } 94 }
95 95
96 /* Divide two int32 values and return result as int32 in a given Q-domain */ 96 /* Divide two int32 values and return result as int32 in a given Q-domain */
97 static inline opus_int32 silk_DIV32_varQ( /* O returns a good approximation of "(a32 << Qres) / b32" */ 97 static OPUS_INLINE opus_int32 silk_DIV32_varQ( /* O returns a good approxim ation of "(a32 << Qres) / b32" */
98 const opus_int32 a32, /* I numerator (Q0) */ 98 const opus_int32 a32, /* I numerator (Q0) */
99 const opus_int32 b32, /* I denominator (Q0) */ 99 const opus_int32 b32, /* I denominator (Q0) */
100 const opus_int Qres /* I Q-domain of result (>= 0) */ 100 const opus_int Qres /* I Q-domain of result (>= 0) */
101 ) 101 )
102 { 102 {
103 opus_int a_headrm, b_headrm, lshift; 103 opus_int a_headrm, b_headrm, lshift;
104 opus_int32 b32_inv, a32_nrm, b32_nrm, result; 104 opus_int32 b32_inv, a32_nrm, b32_nrm, result;
105 105
106 silk_assert( b32 != 0 ); 106 silk_assert( b32 != 0 );
107 silk_assert( Qres >= 0 ); 107 silk_assert( Qres >= 0 );
(...skipping 25 matching lines...) Expand all
133 if( lshift < 32){ 133 if( lshift < 32){
134 return silk_RSHIFT(result, lshift); 134 return silk_RSHIFT(result, lshift);
135 } else { 135 } else {
136 /* Avoid undefined result */ 136 /* Avoid undefined result */
137 return 0; 137 return 0;
138 } 138 }
139 } 139 }
140 } 140 }
141 141
142 /* Invert int32 value and return result as int32 in a given Q-domain */ 142 /* Invert int32 value and return result as int32 in a given Q-domain */
143 static inline opus_int32 silk_INVERSE32_varQ( /* O returns a good approxima tion of "(1 << Qres) / b32" */ 143 static OPUS_INLINE opus_int32 silk_INVERSE32_varQ( /* O returns a good appr oximation of "(1 << Qres) / b32" */
144 const opus_int32 b32, /* I denominator (Q0) */ 144 const opus_int32 b32, /* I denominator (Q0) */
145 const opus_int Qres /* I Q-domain of result (> 0) */ 145 const opus_int Qres /* I Q-domain of result (> 0) */
146 ) 146 )
147 { 147 {
148 opus_int b_headrm, lshift; 148 opus_int b_headrm, lshift;
149 opus_int32 b32_inv, b32_nrm, err_Q32, result; 149 opus_int32 b32_inv, b32_nrm, err_Q32, result;
150 150
151 silk_assert( b32 != 0 ); 151 silk_assert( b32 != 0 );
152 silk_assert( Qres > 0 ); 152 silk_assert( Qres > 0 );
153 153
(...skipping 25 matching lines...) Expand all
179 return 0; 179 return 0;
180 } 180 }
181 } 181 }
182 } 182 }
183 183
184 #ifdef __cplusplus 184 #ifdef __cplusplus
185 } 185 }
186 #endif 186 #endif
187 187
188 #endif /* SILK_FIX_INLINES_H */ 188 #endif /* SILK_FIX_INLINES_H */
OLDNEW
« no previous file with comments | « silk/CNG.c ('k') | silk/LP_variable_cutoff.c » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698