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avcodec/put_bits: Relax requirements to rebase PutBitContext 

The earlier requirement was for the new buffer to be bigger than the old
one. This has been relaxed to only demand that the new buffer can hold
all the data written so far. This is in preparation for further commits.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Andreas Rheinhardt 2019-11-16 06:24:29 +01:00 committed by Michael Niedermayer
parent 57db9f488f
commit 27522fb64c
1 changed files with 18 additions and 18 deletions
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36
libavcodec/put_bits.h
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@ -61,24 +61,6 @@ 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.
*/
@ -87,6 +69,24 @@ static inline int put_bits_count(PutBitContext *s)
return (s->buf_ptr - s->buf) * 8 + 32 - s->bit_left;
}
/**
* 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 large enough to hold everything written so far
*/
static inline void rebase_put_bits(PutBitContext *s, uint8_t *buffer,
int buffer_size)
{
av_assert0(8*buffer_size >= put_bits_count(s));
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 number of bits available in the bitstream.
*/