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188 lines
6.1 KiB
188 lines
6.1 KiB
/*Copyright (c) 2003-2004, Mark Borgerding |
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All rights reserved. |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are met: |
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* Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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* Redistributions in binary form must reproduce the above copyright notice, |
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this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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POSSIBILITY OF SUCH DAMAGE.*/ |
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#ifndef KISS_FFT_GUTS_H |
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#define KISS_FFT_GUTS_H |
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#define MIN(a,b) ((a)<(b) ? (a):(b)) |
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#define MAX(a,b) ((a)>(b) ? (a):(b)) |
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/* kiss_fft.h |
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defines kiss_fft_scalar as either short or a float type |
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and defines |
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typedef struct { kiss_fft_scalar r; kiss_fft_scalar i; }kiss_fft_cpx; */ |
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#include "kiss_fft.h" |
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/* |
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Explanation of macros dealing with complex math: |
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C_MUL(m,a,b) : m = a*b |
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C_FIXDIV( c , div ) : if a fixed point impl., c /= div. noop otherwise |
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C_SUB( res, a,b) : res = a - b |
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C_SUBFROM( res , a) : res -= a |
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C_ADDTO( res , a) : res += a |
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* */ |
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#ifdef FIXED_POINT |
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#include "arch.h" |
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#define SAMP_MAX 2147483647 |
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#define TWID_MAX 32767 |
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#define TRIG_UPSCALE 1 |
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#define SAMP_MIN -SAMP_MAX |
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#ifdef ENABLE_QEXT |
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# define S_MUL(a,b) MULT32_32_P31_ovflw(b, a) |
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# define S_MUL2(a,b) MULT32_32_P31_ovflw(b, a) |
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#else |
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# define S_MUL(a,b) MULT16_32_Q15(b, a) |
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# define S_MUL2(a,b) MULT16_32_Q16(b, a) |
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#endif |
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# define C_MUL(m,a,b) \ |
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do{ (m).r = SUB32_ovflw(S_MUL((a).r,(b).r) , S_MUL((a).i,(b).i)); \ |
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(m).i = ADD32_ovflw(S_MUL((a).r,(b).i) , S_MUL((a).i,(b).r)); }while(0) |
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# define C_MULC(m,a,b) \ |
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do{ (m).r = ADD32_ovflw(S_MUL((a).r,(b).r) , S_MUL((a).i,(b).i)); \ |
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(m).i = SUB32_ovflw(S_MUL((a).i,(b).r) , S_MUL((a).r,(b).i)); }while(0) |
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# define C_MULBYSCALAR( c, s ) \ |
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do{ (c).r = S_MUL( (c).r , s ) ;\ |
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(c).i = S_MUL( (c).i , s ) ; }while(0) |
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# define DIVSCALAR(x,k) \ |
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(x) = S_MUL( x, (TWID_MAX-((k)>>1))/(k)+1 ) |
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# define C_FIXDIV(c,div) \ |
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do { DIVSCALAR( (c).r , div); \ |
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DIVSCALAR( (c).i , div); }while (0) |
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#define C_ADD( res, a,b)\ |
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do {(res).r=ADD32_ovflw((a).r,(b).r); (res).i=ADD32_ovflw((a).i,(b).i); \ |
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}while(0) |
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#define C_SUB( res, a,b)\ |
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do {(res).r=SUB32_ovflw((a).r,(b).r); (res).i=SUB32_ovflw((a).i,(b).i); \ |
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}while(0) |
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#define C_ADDTO( res , a)\ |
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do {(res).r = ADD32_ovflw((res).r, (a).r); (res).i = ADD32_ovflw((res).i,(a).i);\ |
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}while(0) |
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#define C_SUBFROM( res , a)\ |
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do {(res).r = ADD32_ovflw((res).r,(a).r); (res).i = SUB32_ovflw((res).i,(a).i); \ |
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}while(0) |
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#if defined(OPUS_ARM_INLINE_ASM) |
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#include "arm/kiss_fft_armv4.h" |
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#endif |
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#if defined(OPUS_ARM_INLINE_EDSP) |
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#include "arm/kiss_fft_armv5e.h" |
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#endif |
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#if defined(__mips) |
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#include "mips/kiss_fft_mipsr1.h" |
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#endif |
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#else /* not FIXED_POINT*/ |
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# define S_MUL(a,b) ( (a)*(b) ) |
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# define S_MUL2(a,b) ( (a)*(b) ) |
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#define C_MUL(m,a,b) \ |
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do{ (m).r = (a).r*(b).r - (a).i*(b).i;\ |
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(m).i = (a).r*(b).i + (a).i*(b).r; }while(0) |
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#define C_MULC(m,a,b) \ |
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do{ (m).r = (a).r*(b).r + (a).i*(b).i;\ |
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(m).i = (a).i*(b).r - (a).r*(b).i; }while(0) |
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#define C_MUL4(m,a,b) C_MUL(m,a,b) |
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# define C_FIXDIV(c,div) /* NOOP */ |
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# define C_MULBYSCALAR( c, s ) \ |
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do{ (c).r *= (s);\ |
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(c).i *= (s); }while(0) |
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#endif |
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#ifndef CHECK_OVERFLOW_OP |
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# define CHECK_OVERFLOW_OP(a,op,b) /* noop */ |
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#endif |
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#ifndef C_ADD |
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#define C_ADD( res, a,b)\ |
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do { \ |
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CHECK_OVERFLOW_OP((a).r,+,(b).r)\ |
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CHECK_OVERFLOW_OP((a).i,+,(b).i)\ |
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(res).r=(a).r+(b).r; (res).i=(a).i+(b).i; \ |
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}while(0) |
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#define C_SUB( res, a,b)\ |
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do { \ |
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CHECK_OVERFLOW_OP((a).r,-,(b).r)\ |
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CHECK_OVERFLOW_OP((a).i,-,(b).i)\ |
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(res).r=(a).r-(b).r; (res).i=(a).i-(b).i; \ |
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}while(0) |
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#define C_ADDTO( res , a)\ |
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do { \ |
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CHECK_OVERFLOW_OP((res).r,+,(a).r)\ |
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CHECK_OVERFLOW_OP((res).i,+,(a).i)\ |
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(res).r += (a).r; (res).i += (a).i;\ |
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}while(0) |
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#define C_SUBFROM( res , a)\ |
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do {\ |
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CHECK_OVERFLOW_OP((res).r,-,(a).r)\ |
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CHECK_OVERFLOW_OP((res).i,-,(a).i)\ |
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(res).r -= (a).r; (res).i -= (a).i; \ |
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}while(0) |
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#endif /* C_ADD defined */ |
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#ifdef FIXED_POINT |
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/*# define KISS_FFT_COS(phase) TRIG_UPSCALE*floor(MIN(32767,MAX(-32767,.5+32768 * cos (phase)))) |
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# define KISS_FFT_SIN(phase) TRIG_UPSCALE*floor(MIN(32767,MAX(-32767,.5+32768 * sin (phase))))*/ |
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# define KISS_FFT_COS(phase) floor(.5+TWID_MAX*cos (phase)) |
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# define KISS_FFT_SIN(phase) floor(.5+TWID_MAX*sin (phase)) |
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# define HALF_OF(x) ((x)>>1) |
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#elif defined(USE_SIMD) |
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# define KISS_FFT_COS(phase) _mm_set1_ps( cos(phase) ) |
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# define KISS_FFT_SIN(phase) _mm_set1_ps( sin(phase) ) |
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# define HALF_OF(x) ((x)*_mm_set1_ps(.5f)) |
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#else |
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# define KISS_FFT_COS(phase) (kiss_fft_scalar) cos(phase) |
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# define KISS_FFT_SIN(phase) (kiss_fft_scalar) sin(phase) |
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# define HALF_OF(x) ((x)*.5f) |
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#endif |
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#define kf_cexp(x,phase) \ |
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do{ \ |
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(x)->r = KISS_FFT_COS(phase);\ |
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(x)->i = KISS_FFT_SIN(phase);\ |
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}while(0) |
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#define kf_cexp2(x,phase) \ |
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do{ \ |
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(x)->r = TRIG_UPSCALE*celt_cos_norm((phase));\ |
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(x)->i = TRIG_UPSCALE*celt_cos_norm((phase)-32768);\ |
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}while(0) |
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#endif /* KISS_FFT_GUTS_H */
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