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avcodec/hevc_cabac: Move prefix check in coeff_abs_level_remaining_decode() down

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 94d4237a7a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-01-15 23:42:57 +01:00
parent a8ce9d518b
commit f7abc14d0d
1 changed files with 7 additions and 4 deletions
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11
libavcodec/hevc_cabac.c
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@ -977,16 +977,19 @@ static av_always_inline int coeff_abs_level_remaining_decode(HEVCContext *s, int
while (prefix < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc))
prefix++;
if (prefix == CABAC_MAX_BIN) {
av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", prefix);
return 0;
}
if (prefix < 3) {
for (i = 0; i < rc_rice_param; i++)
suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc->cc);
last_coeff_abs_level_remaining = (prefix << rc_rice_param) + suffix;
} else {
int prefix_minus3 = prefix - 3;
if (prefix == CABAC_MAX_BIN) {
av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", prefix);
return 0;
}
for (i = 0; i < prefix_minus3 + rc_rice_param; i++)
suffix = (suffix << 1) | get_cabac_bypass(&s->HEVClc->cc);
last_coeff_abs_level_remaining = (((1 << prefix_minus3) + 3 - 1)