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avcodec/put_bits: Add rebase_put_bits()

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Reviewed-by: Benoit Fouet <benoit.fouet@free.fr>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-09-29 05:42:24 +02:00
parent 8ba6945487
commit cf32181b70
1 changed files with 18 additions and 0 deletions
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18
libavcodec/put_bits.h
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@ -62,6 +62,24 @@ static inline void init_put_bits(PutBitContext *s, uint8_t *buffer,
s->bit_buf = 0;
}
/**
* Rebase the bit writer onto a reallocated buffer.
*
* @param buffer the buffer where to put bits
* @param buffer_size the size in bytes of buffer,
* must be larger than the previous size
*/
static inline void rebase_put_bits(PutBitContext *s, uint8_t *buffer,
int buffer_size)
{
av_assert0(8*buffer_size > s->size_in_bits);
s->buf_end = buffer + buffer_size;
s->buf_ptr = buffer + (s->buf_ptr - s->buf);
s->buf = buffer;
s->size_in_bits = 8 * buffer_size;
}
/**
* @return the total number of bits written to the bitstream.
*/