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Code Issues Releases Activity

avcodec/msmpeg4enc: Only calculate coded_cbp when used

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With this patch, msmpeg4v1 and msmpeg4v2 no longer use
MpegEncContext.coded_block.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2024-04-20 22:11:55 +02:00
parent 60d4c8a137
commit 1a5c21daee
1 changed files with 14 additions and 13 deletions
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27
libavcodec/msmpeg4enc.c
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@ -389,7 +389,6 @@ void ff_msmpeg4_encode_mb(MpegEncContext * s,
{
int cbp, coded_cbp, i;
int pred_x, pred_y;
uint8_t *coded_block;
ff_msmpeg4_handle_slices(s);
@ -449,20 +448,10 @@ void ff_msmpeg4_encode_mb(MpegEncContext * s,
} else {
/* compute cbp */
cbp = 0;
coded_cbp = 0;
for (i = 0; i < 6; i++) {
int val, pred;
val = (s->block_last_index[i] >= 1);
for (int i = 0; i < 6; i++) {
int val = (s->block_last_index[i] >= 1);
cbp |= val << (5 - i);
if (i < 4) {
/* predict value for close blocks only for luma */
pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
*coded_block = val;
val = val ^ pred;
}
coded_cbp |= val << (5 - i);
}
if(s->msmpeg4_version<=2){
if (s->pict_type == AV_PICTURE_TYPE_I) {
put_bits(&s->pb,
@ -480,6 +469,18 @@ void ff_msmpeg4_encode_mb(MpegEncContext * s,
ff_h263_cbpy_tab[cbp>>2][0]);
}else{
if (s->pict_type == AV_PICTURE_TYPE_I) {
/* compute coded_cbp; the 0x3 corresponds to chroma cbp;
* luma coded_cbp are set in the loop below */
coded_cbp = cbp & 0x3;
for (int i = 0; i < 4; i++) {
uint8_t *coded_block;
int pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
int val = (s->block_last_index[i] >= 1);
*coded_block = val;
val ^= pred;
coded_cbp |= val << (5 - i);
}
put_bits(&s->pb,
ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
} else {