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| author | Jun Zhao <jun.zhao@intel.com> | 2017-06-14 10:22:10 +0800 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-24 22:17:15 +0200 |
| commit | 2b7d9a1f3fa759c82aaa3569612b40d5ccb1e319 (patch) | |
| tree | 9df9ccd2bce5821e03a98f48b7ae0ea13ba4ed31 | |
| parent | 2476067680334b147f72930a5e7c3ad7668de4a8 (diff) | |
| download | ffmpeg-2b7d9a1f3fa759c82aaa3569612b40d5ccb1e319.tar.gz | |
lavc/put_bits: Add put_bits64() to support up to 64 bits.
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>
| -rw-r--r-- | libavcodec/put_bits.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/libavcodec/put_bits.h b/libavcodec/put_bits.h index 9bd45cd8ba..b85e88f28c 100644 --- a/libavcodec/put_bits.h +++ b/libavcodec/put_bits.h @@ -243,6 +243,41 @@ static void av_unused put_bits32(PutBitContext *s, uint32_t value) } /** + * 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. */ |