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| author | Peter Ross <pross@xvid.org> | 2019-01-07 22:12:13 +1100 |
|---|---|---|
| committer | Peter Ross <pross@xvid.org> | 2019-01-11 23:43:37 +1100 |
| commit | b4e6d1f597a3d299176cebb42f1cf60e891a259a (patch) | |
| tree | 6c18bf6e35565ebf24f1b9e72ffff342c757e9f3 | |
| parent | c563513fdf7281e2a348fc18c58c51ad5608ed6a (diff) | |
| download | ffmpeg-b4e6d1f597a3d299176cebb42f1cf60e891a259a.tar.gz | |
intreadwrite: add AV_RL64A, AV_WL64A
macros for reading and writing 64-bit aligned little-endian values.
these macros are used by the DST decoder and give a performance boost
on platforms that where the compiler must guard against unaligned
memory access.
| -rw-r--r-- | libavutil/intreadwrite.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libavutil/intreadwrite.h b/libavutil/intreadwrite.h index 67c763b135..4c8413a536 100644 --- a/libavutil/intreadwrite.h +++ b/libavutil/intreadwrite.h @@ -542,6 +542,21 @@ union unaligned_16 { uint16_t l; } __attribute__((packed)) av_alias; # define AV_WN64A(p, v) AV_WNA(64, p, v) #endif +#if AV_HAVE_BIGENDIAN +# define AV_RLA(s, p) av_bswap##s(AV_RN##s##A(p)) +# define AV_WLA(s, p, v) AV_WN##s##A(p, av_bswap##s(v)) +#else +# define AV_RLA(s, p) AV_RN##s##A(p) +# define AV_WLA(s, p, v) AV_WN##s##A(p, v) +#endif + +#ifndef AV_RL64A +# define AV_RL64A(p) AV_RLA(64, p) +#endif +#ifndef AV_WL64A +# define AV_WL64A(p, v) AV_WLA(64, p, v) +#endif + /* * The AV_COPYxxU macros are suitable for copying data to/from unaligned * memory locations. |