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bitstream: add get_bits_longlong() to support more than 32bits

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-09-30 02:39:55 +02:00
parent 89a823ace9
commit f51c4bfe3f
1 changed files with 18 additions and 0 deletions
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18
libavcodec/get_bits.h
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@ -315,6 +315,24 @@ static inline unsigned int get_bits_long(GetBitContext *s, int n)
}
}
/**
* Read 0-64 bits.
*/
static inline uint64_t get_bits_longlong(GetBitContext *s, int n)
{
if (n <= 32)
return get_bits_long(s, n);
else {
#ifdef BITSTREAM_READER_LE
uint64_t ret = get_bits_long(s, 32);
return ret | (((uint64_t)get_bits_long(s, n-32)) << 32);
#else
uint64_t ret = ((uint64_t)get_bits_long(s, 32)) << (n-32);
return ret | get_bits_long(s, n-32);
#endif
}
}
/**
* Read 0-32 bits as a signed integer.
*/