FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg12dec.h
Date: 2022-05-23 03:24:52
Exec Total Coverage
Lines: 8 8 100.0%
Branches: 4 4 100.0%

Line Branch Exec Source
1 /*
2 * MPEG-1/2 decoder header
3 * Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
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_MPEG12DEC_H
23 #define AVCODEC_MPEG12DEC_H
24
25 #include "get_bits.h"
26 #include "mpeg12vlc.h"
27 #include "rl.h"
28
29 #define INIT_2D_VLC_RL(rl, static_size, flags)\
30 {\
31 static RL_VLC_ELEM rl_vlc_table[static_size];\
32 rl.rl_vlc[0] = rl_vlc_table;\
33 ff_init_2d_vlc_rl(&rl, static_size, flags);\
34 }
35
36 void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags);
37
38 1901532 static inline int decode_dc(GetBitContext *gb, int component)
39 {
40 int code, diff;
41
42
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1901532 if (component == 0) {
43 1195944 code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2);
44 } else {
45 705588 code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2);
46 }
47
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1901532 if (code == 0) {
48 265119 diff = 0;
49 } else {
50 1636413 diff = get_xbits(gb, code);
51 }
52 1901532 return diff;
53 }
54
55 int ff_mpeg1_decode_block_intra(GetBitContext *gb,
56 const uint16_t *quant_matrix,
57 const uint8_t *scantable, int last_dc[3],
58 int16_t *block, int index, int qscale);
59
60 #endif /* AVCODEC_MPEG12DEC_H */
61