From 2366a9a4ae5efcdadbd90acbd2885d86bd34720d Mon Sep 17 00:00:00 2001 From: Benny Prijono Date: Sat, 4 Mar 2006 20:43:52 +0000 Subject: Added Speex for narrowband, wideband, and ultra-wideband!! git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@278 74dad513-b988-da41-8d7b-12977e46ad98 --- pjmedia/src/pjmedia-codec/speex/pseudofloat.h | 306 ++++++++++++++++++++++++++ 1 file changed, 306 insertions(+) create mode 100644 pjmedia/src/pjmedia-codec/speex/pseudofloat.h (limited to 'pjmedia/src/pjmedia-codec/speex/pseudofloat.h') diff --git a/pjmedia/src/pjmedia-codec/speex/pseudofloat.h b/pjmedia/src/pjmedia-codec/speex/pseudofloat.h new file mode 100644 index 00000000..8642bf0c --- /dev/null +++ b/pjmedia/src/pjmedia-codec/speex/pseudofloat.h @@ -0,0 +1,306 @@ +/* Copyright (C) 2005 Jean-Marc Valin */ +/** + @file pseudofloat.h + @brief Pseudo-floating point + */ +/* + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + - Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + - Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + - Neither the name of the Xiph.org Foundation nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR + CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#ifndef PSEUDOFLOAT_H +#define PSEUDOFLOAT_H + +#include "misc.h" +#include + +#ifdef FIXED_POINT + +typedef struct { + spx_int16_t m; + spx_int16_t e; +} spx_float_t; + +#define FLOAT_ZERO ((spx_float_t){0,0}) +#define FLOAT_ONE ((spx_float_t){16384,-14}) +#define FLOAT_HALF ((spx_float_t){16384,-15}) + +#define MIN(a,b) ((a)<(b)?(a):(b)) +static inline spx_float_t PSEUDOFLOAT(spx_int32_t x) +{ + int e=0; + int sign=0; + if (x<0) + { + sign = 1; + x = -x; + } + if (x==0) + return (spx_float_t) {0,0}; + while (x>32767) + { + x >>= 1; + /*x *= .5;*/ + e++; + } + while (x<16383) + { + x <<= 1; + /*x *= 2;*/ + e--; + } + if (sign) + return (spx_float_t) {-x,e}; + else + return (spx_float_t) {x,e}; +} + + +static inline spx_float_t FLOAT_ADD(spx_float_t a, spx_float_t b) +{ + spx_float_t r; + if (a.m==0) + return b; + else if (b.m==0) + return a; + r = (a).e > (b).e ? (spx_float_t) {((a).m>>1) + ((b).m>>MIN(15,(a).e-(b).e+1)),(a).e+1} : (spx_float_t) {((b).m>>1) + ((a).m>>MIN(15,(b).e-(a).e+1)),(b).e+1}; + if (r.m>0) + { + if (r.m<16384) + { + r.m<<=1; + r.e-=1; + } + } else { + if (r.m>-16384) + { + r.m<<=1; + r.e-=1; + } + } + /*printf ("%f + %f = %f\n", REALFLOAT(a), REALFLOAT(b), REALFLOAT(r));*/ + return r; +} + +static inline spx_float_t FLOAT_SUB(spx_float_t a, spx_float_t b) +{ + spx_float_t r; + if (a.m==0) + return b; + else if (b.m==0) + return a; + r = (a).e > (b).e ? (spx_float_t) {((a).m>>1) - ((b).m>>MIN(15,(a).e-(b).e+1)),(a).e+1} : (spx_float_t) {((a).m>>MIN(15,(b).e-(a).e+1)) - ((b).m>>1) ,(b).e+1}; + if (r.m>0) + { + if (r.m<16384) + { + r.m<<=1; + r.e-=1; + } + } else { + if (r.m>-16384) + { + r.m<<=1; + r.e-=1; + } + } + /*printf ("%f + %f = %f\n", REALFLOAT(a), REALFLOAT(b), REALFLOAT(r));*/ + return r; +} + +static inline int FLOAT_LT(spx_float_t a, spx_float_t b) +{ + if (a.m==0) + return b.m<0; + else if (b.m==0) + return a.m>0; + if ((a).e > (b).e) + return ((a).m>>1) < ((b).m>>MIN(15,(a).e-(b).e+1)); + else + return ((b).m>>1) > ((a).m>>MIN(15,(b).e-(a).e+1)); + +} + +static inline int FLOAT_GT(spx_float_t a, spx_float_t b) +{ + return FLOAT_LT(b,a); +} + +static inline spx_float_t FLOAT_MULT(spx_float_t a, spx_float_t b) +{ + spx_float_t r = (spx_float_t) {(spx_int16_t)((spx_int32_t)(a).m*(b).m>>15), (a).e+(b).e+15}; + if (r.m>0) + { + if (r.m<16384) + { + r.m<<=1; + r.e-=1; + } + } else { + if (r.m>-16384) + { + r.m<<=1; + r.e-=1; + } + } + /*printf ("%f * %f = %f\n", REALFLOAT(a), REALFLOAT(b), REALFLOAT(r));*/ + return r; +} + + +static inline spx_float_t FLOAT_SHL(spx_float_t a, int b) +{ + return (spx_float_t) {a.m,a.e+b}; +} + +static inline spx_int16_t FLOAT_EXTRACT16(spx_float_t a) +{ + if (a.e<0) + return (a.m+(1<<(-a.e-1)))>>-a.e; + else + return a.m<32767) + { + a >>= 1; + e++; + } + while (a<16384) + { + a <<= 1; + e--; + } + while (b>32767) + { + b >>= 1; + e++; + } + while (b<16384) + { + b <<= 1; + e--; + } + return (spx_float_t) {MULT16_16_Q15(a,b),e+15}; +} + +static inline spx_float_t FLOAT_DIV32_FLOAT(spx_word32_t a, spx_float_t b) +{ + int e=0; + /* FIXME: Handle the sign */ + if (a==0) + return (spx_float_t) {0,0}; + while (a=SHL32(b.m-1,15)) + { + a >>= 1; + e++; + } + return (spx_float_t) {DIV32_16(a,b.m),e-b.e}; +} + + +static inline spx_float_t FLOAT_DIV32(spx_word32_t a, spx_word32_t b) +{ + int e=0; + /* FIXME: Handle the sign */ + if (a==0) + return (spx_float_t) {0,0}; + while (b>32767) + { + b >>= 1; + e--; + } + while (a=SHL32(b-1,15)) + { + a >>= 1; + e++; + } + return (spx_float_t) {DIV32_16(a,b),e}; +} + +static inline spx_float_t FLOAT_DIVU(spx_float_t a, spx_float_t b) +{ + int e=0; + spx_int32_t num; + num = a.m; + while (a.m >= b.m) + { + e++; + a.m >>= 1; + } + num = num << (15-e); + return (spx_float_t) {DIV32_16(num,b.m),a.e-b.e-15+e}; +} + +#else + +#define spx_float_t float +#define FLOAT_ZERO 0.f +#define FLOAT_ONE 1.f +#define FLOAT_HALF 0.5f +#define PSEUDOFLOAT(x) (x) +#define FLOAT_MULT(a,b) ((a)*(b)) +#define FLOAT_MUL32(a,b) ((a)*(b)) +#define FLOAT_DIV32(a,b) ((a)/(b)) +#define FLOAT_EXTRACT16(a) (a) +#define FLOAT_ADD(a,b) ((a)+(b)) +#define FLOAT_SUB(a,b) ((a)-(b)) +#define REALFLOAT(x) (x) +#define FLOAT_DIV32_FLOAT(a,b) ((a)/(b)) +#define FLOAT_MUL32U(a,b) ((a)*(b)) +#define FLOAT_SHL(a,b) (a) +#define FLOAT_LT(a,b) ((a)<(b)) +#define FLOAT_GT(a,b) ((a)>(b)) +#define FLOAT_DIVU(a,b) ((a)/(b)) + +#endif + +#endif -- cgit v1.2.3