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wmv2.h
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1 /*
2  * Copyright (c) 2002 The FFmpeg Project
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVCODEC_WMV2_H
22 #define AVCODEC_WMV2_H
23 
24 #include "avcodec.h"
25 #include "intrax8.h"
26 #include "mpegvideo.h"
27 #include "wmv2dsp.h"
28 
29 #define SKIP_TYPE_NONE 0
30 #define SKIP_TYPE_MPEG 1
31 #define SKIP_TYPE_ROW 2
32 #define SKIP_TYPE_COL 3
33 
34 
35 typedef struct Wmv2Context {
40  int j_type;
41  int abt_flag;
42  int abt_type;
46  int mspel_bit;
50  int skip_type;
51  int hshift;
52 
54  DECLARE_ALIGNED(16, int16_t, abt_block2)[6][64];
55 } Wmv2Context;
56 
58 
60 {
61  static const uint8_t map[3][3] = {
62  { 0, 2, 1 },
63  { 1, 0, 2 },
64  { 2, 1, 0 },
65  };
66 
67  return map[(s->qscale > 10) + (s->qscale > 20)][cbp_index];
68 }
69 
70 #endif /* AVCODEC_WMV2_H */