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avcodec/get_bits: add BITS_LEFT() for finding the bits left with an opened reader

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-08-11 15:15:19 +02:00
parent 7b3de03c8f
commit 11512d70fa
1 changed files with 5 additions and 0 deletions
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5
libavcodec/get_bits.h
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@ -113,6 +113,9 @@ typedef struct RL_VLC_ELEM {
* LAST_SKIP_BITS(name, gb, num)
* Like SKIP_BITS, to be used if next call is UPDATE_CACHE or CLOSE_READER.
*
* BITS_LEFT(name, gb)
* Return the number of bits left
*
* For examples see get_bits, show_bits, skip_bits, get_vlc.
*/
@ -179,6 +182,8 @@ typedef struct RL_VLC_ELEM {
name ## _index = FFMIN(name ## _size_plus8, name ## _index + (num))
#endif
#define BITS_LEFT(name, gb) ((int)((gb)->size_in_bits - name ## _index))
#define SKIP_BITS(name, gb, num) \
do { \
SKIP_CACHE(name, gb, num); \