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get_bits: add HAVE_BITS_REMAINING macro.

This commit is contained in:
Ronald S. Bultje 2012-02-22 12:09:33 -08:00
parent 5ff42e3138
commit b44b41633f
1 changed files with 14 additions and 1 deletions
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15
libavcodec/get_bits.h
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@ -120,10 +120,23 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
# define MIN_CACHE_BITS 25
#endif
#if UNCHECKED_BITSTREAM_READER
#define OPEN_READER(name, gb) \
unsigned int name##_index = (gb)->index; \
unsigned int av_unused name##_cache = 0
#define HAVE_BITS_REMAINING(name, gb) 1
#else
#define OPEN_READER(name, gb) \
unsigned int name##_index = (gb)->index; \
unsigned int av_unused name##_cache = 0; \
unsigned int av_unused name##_size_plus8 = \
(gb)->size_in_bits_plus8
#define HAVE_BITS_REMAINING(name, gb) \
name##_index < name##_size_plus8
#endif
#define CLOSE_READER(name, gb) (gb)->index = name##_index
#ifdef BITSTREAM_READER_LE
@ -156,7 +169,7 @@ for examples see get_bits, show_bits, skip_bits, get_vlc
# define SKIP_COUNTER(name, gb, num) name##_index += (num)
#else
# define SKIP_COUNTER(name, gb, num) \
name##_index = FFMIN((gb)->size_in_bits_plus8, name##_index + (num))
name##_index = FFMIN(name##_size_plus8, name##_index + (num))
#endif
#define SKIP_BITS(name, gb, num) do { \