/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * 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.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * 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 FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
- * @file bswap.h
+ * @file
* byte swapping routines
*/
-#ifndef FFMPEG_BSWAP_H
-#define FFMPEG_BSWAP_H
+#ifndef AVUTIL_BSWAP_H
+#define AVUTIL_BSWAP_H
#include <stdint.h>
+#include "libavutil/avconfig.h"
+#include "attributes.h"
+
+#ifdef HAVE_AV_CONFIG_H
+
#include "config.h"
-#include "common.h"
-#ifdef HAVE_BYTESWAP_H
-#include <byteswap.h>
-#else
+#if ARCH_AARCH64
+# include "aarch64/bswap.h"
+#elif ARCH_ARM
+# include "arm/bswap.h"
+#elif ARCH_AVR32
+# include "avr32/bswap.h"
+#elif ARCH_BFIN
+# include "bfin/bswap.h"
+#elif ARCH_SH4
+# include "sh4/bswap.h"
+#elif ARCH_X86
+# include "x86/bswap.h"
+#endif
+
+#endif /* HAVE_AV_CONFIG_H */
+
+#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))
+#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))
+#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))
-static av_always_inline av_const uint16_t bswap_16(uint16_t x)
+#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)
+
+#ifndef av_bswap16
+static av_always_inline av_const uint16_t av_bswap16(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;
}
+#endif
-static av_always_inline av_const uint32_t bswap_32(uint32_t x)
+#ifndef av_bswap32
+static av_always_inline av_const uint32_t av_bswap32(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;
+ return AV_BSWAP32C(x);
}
+#endif
-static inline uint64_t av_const bswap_64(uint64_t x)
+#ifndef av_bswap64
+static inline uint64_t av_const av_bswap64(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
+ return (uint64_t)av_bswap32(x) << 32 | av_bswap32(x >> 32);
}
+#endif
-#endif /* !HAVE_BYTESWAP_H */
-
-// be2me ... BigEndian to MachineEndian
-// le2me ... LittleEndian to MachineEndian
+// be2ne ... big-endian to native-endian
+// le2ne ... little-endian to native-endian
-#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)
+#if AV_HAVE_BIGENDIAN
+#define av_be2ne16(x) (x)
+#define av_be2ne32(x) (x)
+#define av_be2ne64(x) (x)
+#define av_le2ne16(x) av_bswap16(x)
+#define av_le2ne32(x) av_bswap32(x)
+#define av_le2ne64(x) av_bswap64(x)
+#define AV_BE2NEC(s, x) (x)
+#define AV_LE2NEC(s, x) AV_BSWAPC(s, 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)
+#define av_be2ne16(x) av_bswap16(x)
+#define av_be2ne32(x) av_bswap32(x)
+#define av_be2ne64(x) av_bswap64(x)
+#define av_le2ne16(x) (x)
+#define av_le2ne32(x) (x)
+#define av_le2ne64(x) (x)
+#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)
+#define AV_LE2NEC(s, x) (x)
#endif
-#endif /* FFMPEG_BSWAP_H */
+#define AV_BE2NE16C(x) AV_BE2NEC(16, x)
+#define AV_BE2NE32C(x) AV_BE2NEC(32, x)
+#define AV_BE2NE64C(x) AV_BE2NEC(64, x)
+#define AV_LE2NE16C(x) AV_LE2NEC(16, x)
+#define AV_LE2NE32C(x) AV_LE2NEC(32, x)
+#define AV_LE2NE64C(x) AV_LE2NEC(64, x)
+
+#endif /* AVUTIL_BSWAP_H */
projects / ffmpeg / blobdiff