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B-frames support for adv. profile

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Originally committed as revision 7170 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2006-11-26 04:54:17 +00:00
parent b8ce8f15a0
commit 5081f3aad5
1 changed files with 58 additions and 2 deletions
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60
libavcodec/vc1.c
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@ -1591,8 +1591,7 @@ static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
break;
case 1:
v->s.pict_type = B_TYPE;
return -1;
// break;
break;
case 2:
v->s.pict_type = I_TYPE;
break;
@ -1621,6 +1620,13 @@ static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
if(v->interlace)
v->uvsamp = get_bits1(gb);
if(v->finterpflag) v->interpfrm = get_bits(gb, 1);
if(v->s.pict_type == B_TYPE) {
v->bfraction = get_vlc2(gb, vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);
v->bfraction = vc1_bfraction_lut[v->bfraction];
if(v->bfraction == 0) {
v->s.pict_type = BI_TYPE; /* XXX: should not happen here */
}
}
pqindex = get_bits(gb, 5);
v->pqindex = pqindex;
if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)
@ -1747,6 +1753,56 @@ static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)
v->ttfrm = TT_8X8;
}
break;
case B_TYPE:
if(v->postprocflag)
v->postproc = get_bits1(gb);
if (v->extended_mv) v->mvrange = get_prefix(gb, 0, 3);
else v->mvrange = 0;
v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13
v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11
v->range_x = 1 << (v->k_x - 1);
v->range_y = 1 << (v->k_y - 1);
if (v->pq < 5) v->tt_index = 0;
else if(v->pq < 13) v->tt_index = 1;
else v->tt_index = 2;
lowquant = (v->pq > 12) ? 0 : 1;
v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;
v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);
v->s.mspel = v->s.quarter_sample;
status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);
if (status < 0) return -1;
av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "
"Imode: %i, Invert: %i\n", status>>1, status&1);
v->s.mv_table_index = get_bits(gb, 2);
v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];
if (v->dquant)
{
av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");
vop_dquant_decoding(v);
}
v->ttfrm = 0;
if (v->vstransform)
{
v->ttmbf = get_bits(gb, 1);
if (v->ttmbf)
{
v->ttfrm = ttfrm_to_tt[get_bits(gb, 2)];
}
} else {
v->ttmbf = 1;
v->ttfrm = TT_8X8;
}
break;
}
/* AC Syntax */