libplatform/endian.h Source File
endian.h
1 #ifndef MP4V2_PLATFORM_ENDIAN_H
2 #define MP4V2_PLATFORM_ENDIAN_H
3 
5 
6 #define MP4V2_BYTESWAP_16(x) \
7  mp4v2::platform::uint16_t( ((mp4v2::platform::uint16_t(x) & 0xff00U) >> 8) \
8  | ((mp4v2::platform::uint16_t(x) & 0x00ffU) << 8) )
9 
10 #define MP4V2_BYTESWAP_32(x) \
11  mp4v2::platform::uint32_t( ((mp4v2::platform::uint32_t(x) & 0xff000000U) >> 24) \
12  | ((mp4v2::platform::uint32_t(x) & 0x00ff0000U) >> 8) \
13  | ((mp4v2::platform::uint32_t(x) & 0x0000ff00U) << 8) \
14  | ((mp4v2::platform::uint32_t(x) & 0x000000ffU) << 24) )
15 
16 #define MP4V2_BYTESWAP_64(x) \
17  mp4v2::platform::uint64_t( ((mp4v2::platform::uint64_t(x) & 0xff00000000000000ULL) >> 56) \
18  | ((mp4v2::platform::uint64_t(x) & 0x00ff000000000000ULL) >> 40) \
19  | ((mp4v2::platform::uint64_t(x) & 0x0000ff0000000000ULL) >> 24) \
20  | ((mp4v2::platform::uint64_t(x) & 0x000000ff00000000ULL) >> 8) \
21  | ((mp4v2::platform::uint64_t(x) & 0x00000000ff000000ULL) << 8) \
22  | ((mp4v2::platform::uint64_t(x) & 0x0000000000ff0000ULL) << 24) \
23  | ((mp4v2::platform::uint64_t(x) & 0x000000000000ff00ULL) << 40) \
24  | ((mp4v2::platform::uint64_t(x) & 0x00000000000000ffULL) << 56) )
25 
27 
28 #if defined( __BIG_ENDIAN__ )
29 # define MP4V2_HTONS(x) (x)
30 # define MP4V2_HTONL(x) (x)
31 # define MP4V2_NTOHS(x) (x)
32 # define MP4V2_NTOHL(x) (x)
33 #else
34 # define MP4V2_HTONS(x) MP4V2_BYTESWAP_16(x)
35 # define MP4V2_HTONL(x) MP4V2_BYTESWAP_32(x)
36 # define MP4V2_NTOHS(x) MP4V2_BYTESWAP_16(x)
37 # define MP4V2_NTOHL(x) MP4V2_BYTESWAP_32(x)
38 #endif
39 
41 
42 #endif // MP4V2_PLATFORM_ENDIAN_H