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lavc/put_bits: Add put_bits64() to support up to 64 bits.

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put_bits64() can write up to 64 bits into a bitstream.

Reviewed-by: Mark Thompson <sw@jkqxz.net>
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Jun Zhao <jun.zhao@intel.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Jun Zhao 2017-06-14 10:22:10 +08:00 committed by Michael Niedermayer
parent 2476067680
commit 2b7d9a1f3f
1 changed files with 35 additions and 0 deletions
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35
libavcodec/put_bits.h
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@ -242,6 +242,41 @@ static void av_unused put_bits32(PutBitContext *s, uint32_t value)
s->bit_left = bit_left;
}
/**
* Write up to 64 bits into a bitstream.
*/
static inline void put_bits64(PutBitContext *s, int n, uint64_t value)
{
av_assert2((n == 64) || (n < 64 && value < (UINT64_C(1) << n)));
if (n < 32)
put_bits(s, n, value);
else if (n == 32)
put_bits32(s, value);
else if (n < 64) {
uint32_t lo = value & 0xffffffff;
uint32_t hi = value >> 32;
#ifdef BITSTREAM_WRITER_LE
put_bits32(s, lo);
put_bits(s, n - 32, hi);
#else
put_bits(s, n - 32, hi);
put_bits32(s, lo);
#endif
} else {
uint32_t lo = value & 0xffffffff;
uint32_t hi = value >> 32;
#ifdef BITSTREAM_WRITER_LE
put_bits32(s, lo);
put_bits32(s, hi);
#else
put_bits32(s, hi);
put_bits32(s, lo);
#endif
}
}
/**
* Return the pointer to the byte where the bitstream writer will put
* the next bit.