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avcodec/vvc/intra: fix scaling process for transform coefficients

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See 8.7.3 Scaling process for transform coefficients

Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
This commit is contained in:
Wu Jianhua
2025-05-14 21:40:25 +08:00
committed by Nuo Mi
parent fef573f30b
commit 86e96a1c02
1 changed files with 8 additions and 14 deletions
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16
libavcodec/vvc/intra.c
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@ -306,18 +306,12 @@ static void derive_qp(const VVCLocalContext *lc, const TransformUnit *tu, Transf
const VVCSPS *sps = lc->fc->ps.sps;
const H266RawSliceHeader *rsh = lc->sc->sh.r;
const CodingUnit *cu = lc->cu;
int qp, qp_act_offset;
if (tb->c_idx == 0) {
//fix me
qp = cu->qp[LUMA] + sps->qp_bd_offset;
qp_act_offset = cu->act_enabled_flag ? -5 : 0;
} else {
const int is_jcbcr = tu->joint_cbcr_residual_flag && tu->coded_flag[CB] && tu->coded_flag[CR];
const bool is_jcbcr = tb->c_idx && tu->joint_cbcr_residual_flag && tu->coded_flag[CB] && tu->coded_flag[CR];
const int idx = is_jcbcr ? JCBCR : tb->c_idx;
qp = cu->qp[idx];
qp_act_offset = cu->act_enabled_flag ? 1 : 0;
}
const int qp = cu->qp[idx] + (idx ? 0 : sps->qp_bd_offset);
const int act_offset[] = { -5, 1, 3, 1 };
const int qp_act_offset = cu->act_enabled_flag ? act_offset[idx] : 0;
if (tb->ts) {
const int qp_prime_ts_min = 4 + 6 * sps->r->sps_min_qp_prime_ts;