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avcodec/vvc/cabac: add 9.3.3.5 k-th order Exp - Golomb binarization process

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Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
This commit is contained in:
Wu Jianhua
2025-05-14 21:40:08 +08:00
committed by Nuo Mi
parent fe97bf8752
commit 02fe29fa39
1 changed files with 21 additions and 0 deletions
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21
libavcodec/vvc/cabac.c
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@@ -928,6 +928,27 @@ static int truncated_binary_decode(VVCLocalContext *lc, const int c_max)
return v; return v;
} }
// 9.3.3.5 k-th order Exp - Golomb binarization process
static int kth_order_egk_decode(CABACContext *c, int k)
{
int bit = 1;
int value = 0;
int symbol = 0;
while (bit) {
bit = get_cabac_bypass(c);
value += bit << k++;
}
if (--k) {
for (int i = 0; i < k; i++)
symbol = (symbol << 1) | get_cabac_bypass(c);
value += symbol;
}
return value;
}
// 9.3.3.6 Limited k-th order Exp-Golomb binarization process // 9.3.3.6 Limited k-th order Exp-Golomb binarization process
static int limited_kth_order_egk_decode(CABACContext *c, const int k, const int max_pre_ext_len, const int trunc_suffix_len) static int limited_kth_order_egk_decode(CABACContext *c, const int k, const int max_pre_ext_len, const int trunc_suffix_len)
{ {