1 /*Copyright (c) 2003-2004, Mark Borgerding 2 3 All rights reserved. 4 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions are met: 7 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. 13 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.*/ 25 26 #ifndef KISS_FFT_GUTS_H 27 #define KISS_FFT_GUTS_H 28 29 #define MIN(a,b) ((a)<(b) ? (a):(b)) 30 #define MAX(a,b) ((a)>(b) ? (a):(b)) 31 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" 37 38 /* 39 Explanation of macros dealing with complex math: 40 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" 49 50 51 #define SAMP_MAX 2147483647 52 #define TWID_MAX 32767 53 #define TRIG_UPSCALE 1 54 55 #define SAMP_MIN -SAMP_MAX 56 57 58 # define S_MUL(a,b) MULT16_32_Q15(b, a) 59 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) 63 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) 67 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) 71 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) 75 76 # define DIVSCALAR(x,k) \ 77 (x) = S_MUL( x, (TWID_MAX-((k)>>1))/(k)+1 ) 78 79 # define C_FIXDIV(c,div) \ 80 do { DIVSCALAR( (c).r , div); \ 81 DIVSCALAR( (c).i , div); }while (0) 82 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) 92 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) 96 97 #if defined(OPUS_ARM_INLINE_ASM) 98 #include "arm/kiss_fft_armv4.h" 99 #endif 100 101 #if defined(OPUS_ARM_INLINE_EDSP) 102 #include "arm/kiss_fft_armv5e.h" 103 #endif 104 105 #else /* not FIXED_POINT*/ 106 107 # 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) 114 115 #define C_MUL4(m,a,b) C_MUL(m,a,b) 116 117 # 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 122 123 #ifndef CHECK_OVERFLOW_OP 124 # define CHECK_OVERFLOW_OP(a,op,b) /* noop */ 125 #endif 126 127 #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) 146 147 #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 */ 154 155 #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 170 171 #define kf_cexp(x,phase) \ 172 do{ \ 173 (x)->r = KISS_FFT_COS(phase);\ 174 (x)->i = KISS_FFT_SIN(phase);\ 175 }while(0) 176 177 #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) 182 183 #endif /* KISS_FFT_GUTS_H */ 184