FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/dv_internal.h
Date: 2022-10-02 18:56:10
Exec Total Coverage
Lines: 13 13 100.0%
Branches: 12 14 85.7%

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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
27 #include "dv.h"
28 #include "dv_profile.h"
29
30 typedef struct DVwork_chunk {
31 uint16_t buf_offset;
32 uint16_t mb_coordinates[5];
33 } DVwork_chunk;
34
35 int ff_dv_init_dynamic_tables(DVwork_chunk *work_chunks, const AVDVProfile *d);
36
37 2023 static inline int dv_work_pool_size(const AVDVProfile *d)
38 {
39 2023 int size = d->n_difchan * d->difseg_size * 27;
40
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2023 if (DV_PROFILE_IS_1080i50(d))
41 404 size -= 3 * 27;
42
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2023 if (DV_PROFILE_IS_720p50(d))
43 405 size -= 4 * 27;
44 2023 return size;
45 }
46
47 6072840 static inline void dv_calculate_mb_xy(const AVDVProfile *sys,
48 const uint8_t *buf,
49 const DVwork_chunk *work_chunk,
50 int m, int *mb_x, int *mb_y)
51 {
52 6072840 *mb_x = work_chunk->mb_coordinates[m] & 0xff;
53 6072840 *mb_y = work_chunk->mb_coordinates[m] >> 8;
54
55 /* We work with 720p frames split in half.
56 * The odd half-frame (chan == 2,3) is displaced :-( */
57
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6072840 if (sys->height == 720 && !(buf[1] & 0x0C))
58 /* shifting the Y coordinate down by 72/2 macro blocks */
59
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540000 *mb_y -= (*mb_y > 17) ? 18 : -72;
60 6072840 }
61
62 #endif // AVCODEC_DV_INTERNAL_H
63