media/libopus/celt/_kiss_fft_guts.h@6474c204b198
media/libopus/celt/_kiss_fft_guts.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /*Copyright (c) 2003-2004, Mark Borgerding
3 All rights reserved.
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
8 * Redistributions of source code must retain the above copyright notice,
9 this list of conditions and the following disclaimer.
10 * Redistributions in binary form must reproduce the above copyright notice,
11 this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
14 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
15 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
18 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
24 POSSIBILITY OF SUCH DAMAGE.*/
26 #ifndef KISS_FFT_GUTS_H
27 #define KISS_FFT_GUTS_H
29 #define MIN(a,b) ((a)<(b) ? (a):(b))
30 #define MAX(a,b) ((a)>(b) ? (a):(b))
32 /* kiss_fft.h
33 defines kiss_fft_scalar as either short or a float type
34 and defines
35 typedef struct { kiss_fft_scalar r; kiss_fft_scalar i; }kiss_fft_cpx; */
36 #include "kiss_fft.h"
38 /*
39 Explanation of macros dealing with complex math:
41 C_MUL(m,a,b) : m = a*b
42 C_FIXDIV( c , div ) : if a fixed point impl., c /= div. noop otherwise
43 C_SUB( res, a,b) : res = a - b
44 C_SUBFROM( res , a) : res -= a
45 C_ADDTO( res , a) : res += a
46 * */
47 #ifdef FIXED_POINT
48 #include "arch.h"
51 #define SAMP_MAX 2147483647
52 #define TWID_MAX 32767
53 #define TRIG_UPSCALE 1
55 #define SAMP_MIN -SAMP_MAX
58 # define S_MUL(a,b) MULT16_32_Q15(b, a)
60 # define C_MUL(m,a,b) \
61 do{ (m).r = SUB32(S_MUL((a).r,(b).r) , S_MUL((a).i,(b).i)); \
62 (m).i = ADD32(S_MUL((a).r,(b).i) , S_MUL((a).i,(b).r)); }while(0)
64 # define C_MULC(m,a,b) \
65 do{ (m).r = ADD32(S_MUL((a).r,(b).r) , S_MUL((a).i,(b).i)); \
66 (m).i = SUB32(S_MUL((a).i,(b).r) , S_MUL((a).r,(b).i)); }while(0)
68 # define C_MUL4(m,a,b) \
69 do{ (m).r = SHR32(SUB32(S_MUL((a).r,(b).r) , S_MUL((a).i,(b).i)),2); \
70 (m).i = SHR32(ADD32(S_MUL((a).r,(b).i) , S_MUL((a).i,(b).r)),2); }while(0)
72 # define C_MULBYSCALAR( c, s ) \
73 do{ (c).r = S_MUL( (c).r , s ) ;\
74 (c).i = S_MUL( (c).i , s ) ; }while(0)
76 # define DIVSCALAR(x,k) \
77 (x) = S_MUL( x, (TWID_MAX-((k)>>1))/(k)+1 )
79 # define C_FIXDIV(c,div) \
80 do { DIVSCALAR( (c).r , div); \
81 DIVSCALAR( (c).i , div); }while (0)
83 #define C_ADD( res, a,b)\
84 do {(res).r=ADD32((a).r,(b).r); (res).i=ADD32((a).i,(b).i); \
85 }while(0)
86 #define C_SUB( res, a,b)\
87 do {(res).r=SUB32((a).r,(b).r); (res).i=SUB32((a).i,(b).i); \
88 }while(0)
89 #define C_ADDTO( res , a)\
90 do {(res).r = ADD32((res).r, (a).r); (res).i = ADD32((res).i,(a).i);\
91 }while(0)
93 #define C_SUBFROM( res , a)\
94 do {(res).r = ADD32((res).r,(a).r); (res).i = SUB32((res).i,(a).i); \
95 }while(0)
97 #if defined(OPUS_ARM_INLINE_ASM)
98 #include "arm/kiss_fft_armv4.h"
99 #endif
101 #if defined(OPUS_ARM_INLINE_EDSP)
102 #include "arm/kiss_fft_armv5e.h"
103 #endif
105 #else /* not FIXED_POINT*/
107 # define S_MUL(a,b) ( (a)*(b) )
108 #define C_MUL(m,a,b) \
109 do{ (m).r = (a).r*(b).r - (a).i*(b).i;\
110 (m).i = (a).r*(b).i + (a).i*(b).r; }while(0)
111 #define C_MULC(m,a,b) \
112 do{ (m).r = (a).r*(b).r + (a).i*(b).i;\
113 (m).i = (a).i*(b).r - (a).r*(b).i; }while(0)
115 #define C_MUL4(m,a,b) C_MUL(m,a,b)
117 # define C_FIXDIV(c,div) /* NOOP */
118 # define C_MULBYSCALAR( c, s ) \
119 do{ (c).r *= (s);\
120 (c).i *= (s); }while(0)
121 #endif
123 #ifndef CHECK_OVERFLOW_OP
124 # define CHECK_OVERFLOW_OP(a,op,b) /* noop */
125 #endif
127 #ifndef C_ADD
128 #define C_ADD( res, a,b)\
129 do { \
130 CHECK_OVERFLOW_OP((a).r,+,(b).r)\
131 CHECK_OVERFLOW_OP((a).i,+,(b).i)\
132 (res).r=(a).r+(b).r; (res).i=(a).i+(b).i; \
133 }while(0)
134 #define C_SUB( res, a,b)\
135 do { \
136 CHECK_OVERFLOW_OP((a).r,-,(b).r)\
137 CHECK_OVERFLOW_OP((a).i,-,(b).i)\
138 (res).r=(a).r-(b).r; (res).i=(a).i-(b).i; \
139 }while(0)
140 #define C_ADDTO( res , a)\
141 do { \
142 CHECK_OVERFLOW_OP((res).r,+,(a).r)\
143 CHECK_OVERFLOW_OP((res).i,+,(a).i)\
144 (res).r += (a).r; (res).i += (a).i;\
145 }while(0)
147 #define C_SUBFROM( res , a)\
148 do {\
149 CHECK_OVERFLOW_OP((res).r,-,(a).r)\
150 CHECK_OVERFLOW_OP((res).i,-,(a).i)\
151 (res).r -= (a).r; (res).i -= (a).i; \
152 }while(0)
153 #endif /* C_ADD defined */
155 #ifdef FIXED_POINT
156 /*# define KISS_FFT_COS(phase) TRIG_UPSCALE*floor(MIN(32767,MAX(-32767,.5+32768 * cos (phase))))
157 # define KISS_FFT_SIN(phase) TRIG_UPSCALE*floor(MIN(32767,MAX(-32767,.5+32768 * sin (phase))))*/
158 # define KISS_FFT_COS(phase) floor(.5+TWID_MAX*cos (phase))
159 # define KISS_FFT_SIN(phase) floor(.5+TWID_MAX*sin (phase))
160 # define HALF_OF(x) ((x)>>1)
161 #elif defined(USE_SIMD)
162 # define KISS_FFT_COS(phase) _mm_set1_ps( cos(phase) )
163 # define KISS_FFT_SIN(phase) _mm_set1_ps( sin(phase) )
164 # define HALF_OF(x) ((x)*_mm_set1_ps(.5f))
165 #else
166 # define KISS_FFT_COS(phase) (kiss_fft_scalar) cos(phase)
167 # define KISS_FFT_SIN(phase) (kiss_fft_scalar) sin(phase)
168 # define HALF_OF(x) ((x)*.5f)
169 #endif
171 #define kf_cexp(x,phase) \
172 do{ \
173 (x)->r = KISS_FFT_COS(phase);\
174 (x)->i = KISS_FFT_SIN(phase);\
175 }while(0)
177 #define kf_cexp2(x,phase) \
178 do{ \
179 (x)->r = TRIG_UPSCALE*celt_cos_norm((phase));\
180 (x)->i = TRIG_UPSCALE*celt_cos_norm((phase)-32768);\
181 }while(0)
183 #endif /* KISS_FFT_GUTS_H */
