mirror of https://github.com/FFmpeg/FFmpeg.git
It was deprecated over two years ago.pull/51/head
Diego Biurrun
11 years ago
parent
11bb5e10c3
commit
0d882e9e7b
4 changed files with 0 additions and 149 deletions
@ -1,100 +0,0 @@ |
|||||||
/*
|
|
||||||
* portable IEEE float/double read/write functions |
|
||||||
* |
|
||||||
* Copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> |
|
||||||
* |
|
||||||
* This file is part of Libav. |
|
||||||
* |
|
||||||
* Libav is free software; you can redistribute it and/or |
|
||||||
* modify it under the terms of the GNU Lesser General Public |
|
||||||
* License as published by the Free Software Foundation; either |
|
||||||
* version 2.1 of the License, or (at your option) any later version. |
|
||||||
* |
|
||||||
* Libav is distributed in the hope that it will be useful, |
|
||||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
||||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
||||||
* Lesser General Public License for more details. |
|
||||||
* |
|
||||||
* You should have received a copy of the GNU Lesser General Public |
|
||||||
* License along with Libav; if not, write to the Free Software |
|
||||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
||||||
*/ |
|
||||||
|
|
||||||
/**
|
|
||||||
* @file |
|
||||||
* portable IEEE float/double read/write functions |
|
||||||
*/ |
|
||||||
|
|
||||||
#include <stdint.h> |
|
||||||
#include "mathematics.h" |
|
||||||
#include "intfloat_readwrite.h" |
|
||||||
#include "version.h" |
|
||||||
|
|
||||||
#if FF_API_INTFLOAT |
|
||||||
double av_int2dbl(int64_t v){ |
|
||||||
if((uint64_t)v+v > 0xFFEULL<<52) |
|
||||||
return NAN; |
|
||||||
return ldexp(((v&((1LL<<52)-1)) + (1LL<<52)) * (v>>63|1), (v>>52&0x7FF)-1075); |
|
||||||
} |
|
||||||
|
|
||||||
float av_int2flt(int32_t v){ |
|
||||||
if((uint32_t)v+v > 0xFF000000U) |
|
||||||
return NAN; |
|
||||||
return ldexp(((v&0x7FFFFF) + (1<<23)) * (v>>31|1), (v>>23&0xFF)-150); |
|
||||||
} |
|
||||||
|
|
||||||
double av_ext2dbl(const AVExtFloat ext){ |
|
||||||
uint64_t m = 0; |
|
||||||
int e, i; |
|
||||||
|
|
||||||
for (i = 0; i < 8; i++) |
|
||||||
m = (m<<8) + ext.mantissa[i]; |
|
||||||
e = (((int)ext.exponent[0]&0x7f)<<8) | ext.exponent[1]; |
|
||||||
if (e == 0x7fff && m) |
|
||||||
return NAN; |
|
||||||
e -= 16383 + 63; /* In IEEE 80 bits, the whole (i.e. 1.xxxx)
|
|
||||||
* mantissa bit is written as opposed to the |
|
||||||
* single and double precision formats. */ |
|
||||||
if (ext.exponent[0]&0x80) |
|
||||||
m= -m; |
|
||||||
return ldexp(m, e); |
|
||||||
} |
|
||||||
|
|
||||||
int64_t av_dbl2int(double d){ |
|
||||||
int e; |
|
||||||
if ( !d) return 0; |
|
||||||
else if(d-d) return 0x7FF0000000000000LL + ((int64_t)(d<0)<<63) + (d!=d); |
|
||||||
d= frexp(d, &e); |
|
||||||
return (int64_t)(d<0)<<63 | (e+1022LL)<<52 | (int64_t)((fabs(d)-0.5)*(1LL<<53)); |
|
||||||
} |
|
||||||
|
|
||||||
int32_t av_flt2int(float d){ |
|
||||||
int e; |
|
||||||
if ( !d) return 0; |
|
||||||
else if(d-d) return 0x7F800000 + ((d<0)<<31) + (d!=d); |
|
||||||
d= frexp(d, &e); |
|
||||||
return (d<0)<<31 | (e+126)<<23 | (int64_t)((fabs(d)-0.5)*(1<<24)); |
|
||||||
} |
|
||||||
|
|
||||||
AVExtFloat av_dbl2ext(double d){ |
|
||||||
struct AVExtFloat ext= {{0}}; |
|
||||||
int e, i; double f; uint64_t m; |
|
||||||
|
|
||||||
f = fabs(frexp(d, &e)); |
|
||||||
if (f >= 0.5 && f < 1) { |
|
||||||
e += 16382; |
|
||||||
ext.exponent[0] = e>>8; |
|
||||||
ext.exponent[1] = e; |
|
||||||
m = (uint64_t)ldexp(f, 64); |
|
||||||
for (i=0; i < 8; i++) |
|
||||||
ext.mantissa[i] = m>>(56-(i<<3)); |
|
||||||
} else if (f != 0.0) { |
|
||||||
ext.exponent[0] = 0x7f; ext.exponent[1] = 0xff; |
|
||||||
if (f != INFINITY) |
|
||||||
ext.mantissa[0] = ~0; |
|
||||||
} |
|
||||||
if (d < 0) |
|
||||||
ext.exponent[0] |= 0x80; |
|
||||||
return ext; |
|
||||||
} |
|
||||||
#endif /* FF_API_INTFLOAT */ |
|
||||||
@ -1,44 +0,0 @@ |
|||||||
/*
|
|
||||||
* copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> |
|
||||||
* |
|
||||||
* This file is part of Libav. |
|
||||||
* |
|
||||||
* Libav is free software; you can redistribute it and/or |
|
||||||
* modify it under the terms of the GNU Lesser General Public |
|
||||||
* License as published by the Free Software Foundation; either |
|
||||||
* version 2.1 of the License, or (at your option) any later version. |
|
||||||
* |
|
||||||
* Libav is distributed in the hope that it will be useful, |
|
||||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
||||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
||||||
* Lesser General Public License for more details. |
|
||||||
* |
|
||||||
* You should have received a copy of the GNU Lesser General Public |
|
||||||
* License along with Libav; if not, write to the Free Software |
|
||||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
|
||||||
*/ |
|
||||||
|
|
||||||
#ifndef AVUTIL_INTFLOAT_READWRITE_H |
|
||||||
#define AVUTIL_INTFLOAT_READWRITE_H |
|
||||||
|
|
||||||
#include <stdint.h> |
|
||||||
|
|
||||||
#include "attributes.h" |
|
||||||
#include "version.h" |
|
||||||
|
|
||||||
#if FF_API_INTFLOAT |
|
||||||
/* IEEE 80 bits extended float */ |
|
||||||
typedef struct AVExtFloat { |
|
||||||
uint8_t exponent[2]; |
|
||||||
uint8_t mantissa[8]; |
|
||||||
} AVExtFloat; |
|
||||||
|
|
||||||
attribute_deprecated double av_int2dbl(int64_t v) av_const; |
|
||||||
attribute_deprecated float av_int2flt(int32_t v) av_const; |
|
||||||
attribute_deprecated double av_ext2dbl(const AVExtFloat ext) av_const; |
|
||||||
attribute_deprecated int64_t av_dbl2int(double d) av_const; |
|
||||||
attribute_deprecated int32_t av_flt2int(float d) av_const; |
|
||||||
attribute_deprecated AVExtFloat av_dbl2ext(double d) av_const; |
|
||||||
#endif /* FF_API_INTFLOAT */ |
|
||||||
|
|
||||||
#endif /* AVUTIL_INTFLOAT_READWRITE_H */ |
|
||||||
Loading…
Reference in new issue