mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-21 06:50:44 +00:00
84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef INTREADWRITE_H
|
|
#define INTREADWRITE_H
|
|
|
|
#ifdef __GNUC__
|
|
|
|
struct unaligned_64 { uint64_t l; } __attribute__((packed));
|
|
struct unaligned_32 { uint32_t l; } __attribute__((packed));
|
|
struct unaligned_16 { uint16_t l; } __attribute__((packed));
|
|
|
|
#define LD16(a) (((const struct unaligned_16 *) (a))->l)
|
|
#define LD32(a) (((const struct unaligned_32 *) (a))->l)
|
|
#define LD64(a) (((const struct unaligned_64 *) (a))->l)
|
|
|
|
#define ST16(a, b) (((struct unaligned_16 *) (a))->l) = (b)
|
|
#define ST32(a, b) (((struct unaligned_32 *) (a))->l) = (b)
|
|
|
|
#else /* __GNUC__ */
|
|
|
|
#define LD16(a) (*((uint16_t*)(a)))
|
|
#define LD32(a) (*((uint32_t*)(a)))
|
|
#define LD64(a) (*((uint64_t*)(a)))
|
|
|
|
#define ST16(a, b) *((uint16_t*)(a)) = (b)
|
|
#define ST32(a, b) *((uint32_t*)(a)) = (b)
|
|
|
|
#endif /* !__GNUC__ */
|
|
|
|
/* endian macros */
|
|
#define AV_RB8(x) (((uint8_t*)(x))[0])
|
|
#define AV_WB8(p, d) { ((uint8_t*)(p))[0] = (d); }
|
|
|
|
#define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
|
|
#define AV_WB16(p, d) { \
|
|
((uint8_t*)(p))[1] = (d); \
|
|
((uint8_t*)(p))[0] = (d)>>8; }
|
|
|
|
#define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \
|
|
(((uint8_t*)(x))[1] << 16) | \
|
|
(((uint8_t*)(x))[2] << 8) | \
|
|
((uint8_t*)(x))[3])
|
|
#define AV_WB32(p, d) { \
|
|
((uint8_t*)(p))[3] = (d); \
|
|
((uint8_t*)(p))[2] = (d)>>8; \
|
|
((uint8_t*)(p))[1] = (d)>>16; \
|
|
((uint8_t*)(p))[0] = (d)>>24; }
|
|
|
|
#define AV_RL8(x) AV_RB8(x)
|
|
#define AV_WL8(p, d) AV_WB8(p, d)
|
|
|
|
#define AV_RL16(x) ((((uint8_t*)(x))[1] << 8) | ((uint8_t*)(x))[0])
|
|
#define AV_WL16(p, d) { \
|
|
((uint8_t*)(p))[0] = (d); \
|
|
((uint8_t*)(p))[1] = (d)>>8; }
|
|
|
|
#define AV_RL32(x) ((((uint8_t*)(x))[3] << 24) | \
|
|
(((uint8_t*)(x))[2] << 16) | \
|
|
(((uint8_t*)(x))[1] << 8) | \
|
|
((uint8_t*)(x))[0])
|
|
#define AV_WL32(p, d) { \
|
|
((uint8_t*)(p))[0] = (d); \
|
|
((uint8_t*)(p))[1] = (d)>>8; \
|
|
((uint8_t*)(p))[2] = (d)>>16; \
|
|
((uint8_t*)(p))[3] = (d)>>24; }
|
|
|
|
#endif /* INTREADWRITE_H */
|