mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-13 18:55:08 +00:00
85074d3c93
in libavutil. Fix a compilation failure in r12489. Originally committed as revision 12498 to svn://svn.ffmpeg.org/ffmpeg/trunk
129 lines
3.2 KiB
C
129 lines
3.2 KiB
C
/*
|
|
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file bswap.h
|
|
* byte swapping routines
|
|
*/
|
|
|
|
#ifndef FFMPEG_BSWAP_H
|
|
#define FFMPEG_BSWAP_H
|
|
|
|
#include <stdint.h>
|
|
#include "config.h"
|
|
#include "common.h"
|
|
|
|
#ifdef HAVE_BYTESWAP_H
|
|
#include <byteswap.h>
|
|
#else
|
|
|
|
static av_always_inline av_const uint16_t bswap_16(uint16_t x)
|
|
{
|
|
#if defined(ARCH_X86)
|
|
asm("rorw $8, %0" : "+r"(x));
|
|
#elif defined(ARCH_SH4)
|
|
asm("swap.b %0,%0" : "=r"(x) : "0"(x));
|
|
#else
|
|
x= (x>>8) | (x<<8);
|
|
#endif
|
|
return x;
|
|
}
|
|
|
|
static av_always_inline av_const uint32_t bswap_32(uint32_t x)
|
|
{
|
|
#if defined(ARCH_X86)
|
|
#ifdef HAVE_BSWAP
|
|
asm("bswap %0" : "+r" (x));
|
|
#else
|
|
asm("rorw $8, %w0 \n\t"
|
|
"rorl $16, %0 \n\t"
|
|
"rorw $8, %w0"
|
|
: "+r"(x));
|
|
#endif
|
|
#elif defined(ARCH_SH4)
|
|
asm("swap.b %0,%0\n"
|
|
"swap.w %0,%0\n"
|
|
"swap.b %0,%0\n"
|
|
: "=r"(x) : "0"(x));
|
|
#elif defined(ARCH_ARM)
|
|
uint32_t t;
|
|
asm ("eor %1, %0, %0, ror #16 \n\t"
|
|
"bic %1, %1, #0xFF0000 \n\t"
|
|
"mov %0, %0, ror #8 \n\t"
|
|
"eor %0, %0, %1, lsr #8 \n\t"
|
|
: "+r"(x), "+r"(t));
|
|
#elif defined(ARCH_BFIN)
|
|
unsigned tmp;
|
|
asm("%1 = %0 >> 8 (V); \n\t"
|
|
"%0 = %0 << 8 (V); \n\t"
|
|
"%0 = %0 | %1; \n\t"
|
|
"%0 = PACK(%0.L, %0.H); \n\t"
|
|
: "+d"(x), "=&d"(tmp));
|
|
#else
|
|
x= ((x<<8)&0xFF00FF00) | ((x>>8)&0x00FF00FF);
|
|
x= (x>>16) | (x<<16);
|
|
#endif
|
|
return x;
|
|
}
|
|
|
|
static inline uint64_t av_const bswap_64(uint64_t x)
|
|
{
|
|
#if 0
|
|
x= ((x<< 8)&0xFF00FF00FF00FF00ULL) | ((x>> 8)&0x00FF00FF00FF00FFULL);
|
|
x= ((x<<16)&0xFFFF0000FFFF0000ULL) | ((x>>16)&0x0000FFFF0000FFFFULL);
|
|
return (x>>32) | (x<<32);
|
|
#elif defined(ARCH_X86_64)
|
|
asm("bswap %0": "=r" (x) : "0" (x));
|
|
return x;
|
|
#else
|
|
union {
|
|
uint64_t ll;
|
|
uint32_t l[2];
|
|
} w, r;
|
|
w.ll = x;
|
|
r.l[0] = bswap_32 (w.l[1]);
|
|
r.l[1] = bswap_32 (w.l[0]);
|
|
return r.ll;
|
|
#endif
|
|
}
|
|
|
|
#endif /* !HAVE_BYTESWAP_H */
|
|
|
|
// be2me ... BigEndian to MachineEndian
|
|
// le2me ... LittleEndian to MachineEndian
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
#define be2me_16(x) (x)
|
|
#define be2me_32(x) (x)
|
|
#define be2me_64(x) (x)
|
|
#define le2me_16(x) bswap_16(x)
|
|
#define le2me_32(x) bswap_32(x)
|
|
#define le2me_64(x) bswap_64(x)
|
|
#else
|
|
#define be2me_16(x) bswap_16(x)
|
|
#define be2me_32(x) bswap_32(x)
|
|
#define be2me_64(x) bswap_64(x)
|
|
#define le2me_16(x) (x)
|
|
#define le2me_32(x) (x)
|
|
#define le2me_64(x) (x)
|
|
#endif
|
|
|
|
#endif /* FFMPEG_BSWAP_H */
|