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lavc/hevc_refs: exclude current frame from long term refs

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suppose
a. You have 3 frames, 0, 1, 4096.
b. The ltMask is 0xfff and use_msb is 0.
c. The 0, 1 are lt refs for 4096.
d. you are decoding frame 4096, and get the 0 frame.
Since 4096 & ltMask is 0 too, even you want get 0, find_ref_idx may give you 4096.
add_candidate_ref will report an error for this

Tested-by: Fei Wang <fei.w.wang@intel.com>
Signed-off-by: Xu Guangxin <guangxin.xu@intel.com>
This commit is contained in:
Xu Guangxin 2022-07-15 13:06:43 +08:00 committed by Haihao Xiang
parent 99501b5015
commit 2191f9a6af
1 changed files with 1 additions and 1 deletions
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2
libavcodec/hevc_refs.c
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@ -387,7 +387,7 @@ static HEVCFrame *find_ref_idx(HEVCContext *s, int poc, uint8_t use_msb)
for (i = 0; i < FF_ARRAY_ELEMS(s->DPB); i++) {
HEVCFrame *ref = &s->DPB[i];
if (ref->frame->buf[0] && ref->sequence == s->seq_decode) {
if ((ref->poc & mask) == poc)
if ((ref->poc & mask) == poc && (use_msb || ref->poc != s->poc))
return ref;
}
}