FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/vc1_pred.h
Date: 2022-11-26 13:19:19
Exec Total Coverage
Lines: 7 7 100.0%
Branches: 4 4 100.0%

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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, int dir);
34 void ff_vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2],
35 int direct, int mvtype);
36 void ff_vc1_pred_b_mv_intfi(VC1Context *v, int n, int *dmv_x, int *dmv_y,
37 int mv1, int *pred_flag);
38
39 154028 static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)
40 {
41 154028 int n = bfrac;
42
43 #if B_FRACTION_DEN==256
44
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154028 if (inv)
45 77014 n -= 256;
46
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154028 if (!qs)
47 8104 return 2 * ((value * n + 255) >> 9);
48 145924 return (value * n + 128) >> 8;
49 #else
50 if (inv)
51 n -= B_FRACTION_DEN;
52 if (!qs)
53 return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));
54 return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;
55 #endif
56 }
57
58 #endif /* AVCODEC_VC1_PRED_H */
59