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ffmpeg.wasm-core
Commit 3a3f1cf3 authored by Kostya Shishkov's avatar Kostya Shishkov
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Fix mquant selection for ALL_MBS mode 

Originally committed as revision 5686 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 65c7bb9e
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Showing with 3 additions and 4 deletions
libavcodec/vc1.c
View file @ 3a3f1cf3
......@@ -704,7 +704,7 @@ static int vop_dquant_decoding(VC1Context *v)
v->dqbilevel = get_bits(gb, 1);
default: break; //Forbidden ?
}
if (!v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)
{
pqdiff = get_bits(gb, 3);
if (pqdiff == 7) v->altpq = get_bits(gb, 5);
......@@ -1449,7 +1449,7 @@ static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
{ \
if (v->dqbilevel) \
{ \
mquant = (get_bits(gb, 1)) ? v->pq : v->altpq; \
mquant = (get_bits(gb, 1)) ? v->altpq : v->pq; \
} \
else \
{ \
......@@ -1464,10 +1464,9 @@ static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
edges = (3 << v->dqsbedge) % 15; \
else if(v->dqprofile == DQPROFILE_FOUR_EDGES) \
edges = 15; \
mquant = v->pq; \
if((edges&1) && !s->mb_x) \
mquant = v->altpq; \
if((edges&2) && !s->mb_y) \
if((edges&2) && s->first_slice_line) \
mquant = v->altpq; \
if((edges&4) && s->mb_x == (s->mb_width - 1)) \
mquant = v->altpq; \
......
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