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Record B-fraction index from frame header and two fields from entry point structure

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into VC-1 context.

Patch by Gwenole Beauchesne
(gbeauchesne <whirlpool> splitted <dash> desktop <dit> com)
Thread [PATCH][VC-1] Record extra syntax elements for VA API support

Originally committed as revision 16859 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Gwenole Beauchesne 2009-01-30 17:15:08 +00:00 committed by Kostya Shishkov
parent 3021a8a70b
commit f92a6c66ed
2 changed files with 11 additions and 8 deletions
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16
libavcodec/vc1.c
View File

@ -1075,11 +1075,11 @@ static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)
static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)
{
VC1Context *v = avctx->priv_data;
int i, blink, clentry;
int i;
av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));
blink = get_bits1(gb); // broken link
clentry = get_bits1(gb); // closed entry
v->broken_link = get_bits1(gb);
v->closed_entry = get_bits1(gb);
v->panscanflag = get_bits1(gb);
v->refdist_flag = get_bits1(gb);
v->s.loop_filter = get_bits1(gb);
@ -1115,7 +1115,7 @@ static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)
"BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"
"RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"
"DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",
blink, clentry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
v->broken_link, v->closed_entry, v->panscanflag, v->refdist_flag, v->s.loop_filter,
v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);
return 0;
@ -1139,8 +1139,8 @@ static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)
v->bi_type = 0;
if(v->s.pict_type == FF_B_TYPE) {
v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
if(v->bfraction == 0) {
v->s.pict_type = FF_BI_TYPE;
}
@ -1381,8 +1381,8 @@ static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
v->uvsamp = get_bits1(gb);
if(v->finterpflag) v->interpfrm = get_bits1(gb);
if(v->s.pict_type == FF_B_TYPE) {
v->bfraction = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
v->bfraction = ff_vc1_bfraction_lut[v->bfraction];
v->bfraction_lut_index = get_vlc2(gb, ff_vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
v->bfraction = ff_vc1_bfraction_lut[v->bfraction_lut_index];
if(v->bfraction == 0) {
v->s.pict_type = FF_BI_TYPE; /* XXX: should not happen here */
}

3
libavcodec/vc1.h
View File

@ -307,6 +307,9 @@ typedef struct VC1Context{
int x8_type;
uint32_t *cbp_base, *cbp;
uint8_t bfraction_lut_index;///< Index for BFRACTION value (see Table 40, reproduced into ff_vc1_bfraction_lut[])
uint8_t broken_link; ///< Broken link flag (BROKEN_LINK syntax element)
uint8_t closed_entry; ///< Closed entry point flag (CLOSED_ENTRY syntax element)
} VC1Context;
#endif /* AVCODEC_VC1_H */