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Deobfuscate LE SHOW_[SU]BITS; these are simple sign/zero-extend

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Originally committed as revision 21948 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-02-21 21:48:40 +00:00
parent 48960b8f24
commit 7cd7d19e86
1 changed files with 2 additions and 2 deletions
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4
libavcodec/get_bits.h
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@ -166,10 +166,10 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
# ifdef ALT_BITSTREAM_READER_LE # ifdef ALT_BITSTREAM_READER_LE
# define SHOW_UBITS(name, gb, num)\ # define SHOW_UBITS(name, gb, num)\
((name##_cache) & (NEG_USR32(0xffffffff,num))) zero_extend(name##_cache, num)
# define SHOW_SBITS(name, gb, num)\ # define SHOW_SBITS(name, gb, num)\
NEG_SSR32((name##_cache)<<(32-(num)), num) sign_extend(name##_cache, num)
# else # else
# define SHOW_UBITS(name, gb, num)\ # define SHOW_UBITS(name, gb, num)\
NEG_USR32(name##_cache, num) NEG_USR32(name##_cache, num)