2 * VC-1 and WMV3 decoder
3 * Copyright (c) 2006-2007 Konstantin Shishkov
4 * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef AVCODEC_VC1_PRED_H
24 #define AVCODEC_VC1_PRED_H
29 void ff_vc1_pred_mv(VC1Context
*v
, int n
, int dmv_x
, int dmv_y
,
30 int mv1
, int r_x
, int r_y
, uint8_t* is_intra
,
31 int pred_flag
, int dir
);
32 void ff_vc1_pred_mv_intfr(VC1Context
*v
, int n
, int dmv_x
, int dmv_y
,
33 int mvn
, int r_x
, int r_y
, uint8_t* is_intra
,
35 void ff_vc1_pred_b_mv(VC1Context
*v
, int dmv_x
[2], int dmv_y
[2],
36 int direct
, int mvtype
);
37 void ff_vc1_pred_b_mv_intfi(VC1Context
*v
, int n
, int *dmv_x
, int *dmv_y
,
38 int mv1
, int *pred_flag
);
40 static av_always_inline
int scale_mv(int value
, int bfrac
, int inv
, int qs
)
44 #if B_FRACTION_DEN==256
48 return 2 * ((value
* n
+ 255) >> 9);
49 return (value
* n
+ 128) >> 8;
54 return 2 * ((value
* n
+ B_FRACTION_DEN
- 1) / (2 * B_FRACTION_DEN
));
55 return (value
* n
+ B_FRACTION_DEN
/2) / B_FRACTION_DEN
;
59 #endif /* AVCODEC_VC1_PRED_H */