FFmpeg
vc1_pred.h
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1 /*
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
5  *
6  * This file is part of FFmpeg.
7  *
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.
12  *
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.
17  *
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
21  */
22 
23 #ifndef AVCODEC_VC1_PRED_H
24 #define AVCODEC_VC1_PRED_H
25 
26 #include "vc1.h"
27 #include "vc1data.h"
28 
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,
34  int dir);
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);
39 
40 static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
41 {
42  int n = bfrac;
43 
44 #if B_FRACTION_DEN==256
45  if (inv)
46  n -= 256;
47  if (!qs)
48  return 2 * ((value * n + 255) >> 9);
49  return (value * n + 128) >> 8;
50 #else
51  if (inv)
52  n -= B_FRACTION_DEN;
53  if (!qs)
54  return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
55  return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
56 #endif
57 }
58 
59 #endif /* AVCODEC_VC1_PRED_H */
The VC1 Context.
Definition: vc1.h:173
void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y, int mv1, int *pred_flag)
Definition: vc1_pred.c:891
VC-1 tables.
uint8_t
void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)
Definition: vc1_pred.c:691
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:108
#define B_FRACTION_DEN
Definition: vc1data.h:99
int n
Definition: avisynth_c.h:760
static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
Definition: vc1_pred.h:40
void ff_vc1_pred_mv_intfr(VC1Context *v, int n, int dmv_x, int dmv_y, int mvn, int r_x, int r_y, uint8_t *is_intra, int dir)
Predict and set motion vector for interlaced frame picture MBs.
Definition: vc1_pred.c:470
void ff_vc1_pred_mv(VC1Context *v, int n, int dmv_x, int dmv_y, int mv1, int r_x, int r_y, uint8_t *is_intra, int pred_flag, int dir)
Predict and set motion vector.
Definition: vc1_pred.c:212
#define av_always_inline
Definition: attributes.h:39