1 /*
2 * DV encoder/decoder shared code
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef AVCODEC_DV_INTERNAL_H
23 #define AVCODEC_DV_INTERNAL_H
24
25 #include <stdint.h>
26
29
34
36
38 {
45 }
46
48 const uint8_t *buf,
50 int m, int *mb_x, int *mb_y)
51 {
54
55 /* We work with 720p frames split in half.
56 * The odd half-frame (chan == 2,3) is displaced :-( */
57 if (sys->
height == 720 && !(buf[1] & 0x0C))
58 /* shifting the Y coordinate down by 72/2 macro blocks */
59 *mb_y -= (*mb_y > 17) ? 18 : -72;
60 }
61
62 #endif // AVCODEC_DV_INTERNAL_H