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avcodec/rangecoder: Add and test ff_rac_check_termination()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-12-23 14:17:11 +01:00
parent 20b10ba83c
commit b6c2c58904
3 changed files with 33 additions and 2 deletions
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9
libavcodec/rangecoder.h
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@ -57,6 +57,15 @@ void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf, int buf_size);
*/
int ff_rac_terminate(RangeCoder *c, int version);
/**
* Check if at the current position there is a valid looking termination
* @param version version 0 requires the decoder to know the data size in bytes
* version 1 needs about 1 bit more space but does not need to
* carry the size from encoder to decoder
* @returns negative AVERROR code on error or non negative.
*/
int ff_rac_check_termination(RangeCoder *c, int version);
void ff_build_rac_states(RangeCoder *c, int factor, int max_p);
static inline void renorm_encoder(RangeCoder *c)