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Code Issues Releases Activity

avcodec/ituh263dec: Don't process unnecessarily many coefficients

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Overriding the number of coefficients is only necessary if
ac_pred is in used, not for h263_aic alone (for which only
the DC coefficient is predicted) as it is done here.

And since d50635cd24
the H.263 unquantize-intra functions override the number of
coefficients in case of ac_pred, so we don't have to do this here.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-05-25 17:02:17 +02:00
parent ea4b9a121d
commit 5507da21e6
1 changed files with 1 additions and 2 deletions
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3
libavcodec/ituh263dec.c
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@ -542,10 +542,10 @@ static int h263_decode_block(MpegEncContext * s, int16_t * block,
scan_table = s->intra_scantable.permutated;
if (s->h263_aic && s->mb_intra) {
i = 0;
if (!coded)
goto not_coded;
rl = &ff_rl_intra_aic;
i = 0;
if (s->ac_pred) {
if (s->h263_aic_dir)
scan_table = s->permutated_intra_v_scantable; /* left */
@ -672,7 +672,6 @@ retry:
if (s->mb_intra && s->h263_aic) {
not_coded:
h263_pred_acdc(s, block, n);
i = 63;
}
s->block_last_index[n] = i;
return 0;