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reference list 1 swaping fix? seems its not used by any samples i found though

Originally committed as revision 3863 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Michael Niedermayer 20 years ago
parent 4c12e8bee3
commit 3b33943e9b
1 changed files with 10 additions and 25 deletions
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  1. 35
      libavcodec/h264.c

35
libavcodec/h264.c
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@ -2886,32 +2886,17 @@ static int fill_default_ref_list(H264Context *h){
// find the largest poc
for(list=0; list<2; list++){
int index = 0;
int swap_first_L1 = 0;
int j= -99;
int step= list ? -1 : 1;
if (0 == list) {
for(i=smallest_poc_greater_than_current-1; i>=0 && index < h->ref_count[list]; i--) {
if(sorted_short_ref[i].reference != 3) continue;
h->default_ref_list[list][index ]= sorted_short_ref[i];
h->default_ref_list[list][index++].pic_id= sorted_short_ref[i].frame_num;
}
for(i=smallest_poc_greater_than_current; i<h->short_ref_count && index < h->ref_count[list]; i++) {
if(sorted_short_ref[i].reference != 3) continue;
h->default_ref_list[list][index ]= sorted_short_ref[i];
h->default_ref_list[list][index++].pic_id= sorted_short_ref[i].frame_num;
}
} else {
for(i=smallest_poc_greater_than_current; i<h->short_ref_count && index < h->ref_count[list]; i++) {
if(sorted_short_ref[i].reference != 3) continue;
swap_first_L1 |= 1;
h->default_ref_list[list][index ]= sorted_short_ref[i];
h->default_ref_list[list][index++].pic_id= sorted_short_ref[i].frame_num;
}
for(i=smallest_poc_greater_than_current-1; i>=0 && index < h->ref_count[list]; i--) {
if(sorted_short_ref[i].reference != 3) continue;
swap_first_L1 |= 2;
h->default_ref_list[list][index ]= sorted_short_ref[i];
h->default_ref_list[list][index++].pic_id= sorted_short_ref[i].frame_num;
for(i=0; i<h->short_ref_count && index < h->ref_count[list]; i++, j+=step) {
while(j<0 || j>= h->short_ref_count){
step = -step;
j= smallest_poc_greater_than_current + (step>>1);
}
if(sorted_short_ref[j].reference != 3) continue;
h->default_ref_list[list][index ]= sorted_short_ref[j];
h->default_ref_list[list][index++].pic_id= sorted_short_ref[j].frame_num;
}
for(i = 0; i < 16 && index < h->ref_count[ list ]; i++){
@ -2922,7 +2907,7 @@ static int fill_default_ref_list(H264Context *h){
h->default_ref_list[ list ][index++].pic_id= i;;
}
if(list && (3 == swap_first_L1) && (1 < index)){
if(list && (smallest_poc_greater_than_current<=0 || smallest_poc_greater_than_current>=h->short_ref_count) && (1 < index)){
// swap the two first elements of L1 when
// L0 and L1 are identical
Picture temp= h->default_ref_list[1][0];

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