FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg12dec.h
Date: 2024-07-14 13:34:57
Exec Total Coverage
Lines: 8 8 100.0%
Functions: 1 1 100.0%
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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
28 #define MB_TYPE_ZERO_MV MB_TYPE_CODEC_SPECIFIC
29
30 2157767 static inline int decode_dc(GetBitContext *gb, int component)
31 {
32 int code, diff;
33
34
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2157767 if (component == 0) {
35 1366307 code = get_vlc2(gb, ff_dc_lum_vlc, DC_VLC_BITS, 2);
36 } else {
37 791460 code = get_vlc2(gb, ff_dc_chroma_vlc, DC_VLC_BITS, 2);
38 }
39
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2157767 if (code == 0) {
40 299099 diff = 0;
41 } else {
42 1858668 diff = get_xbits(gb, code);
43 }
44 2157767 return diff;
45 }
46
47 int ff_mpeg1_decode_block_intra(GetBitContext *gb,
48 const uint16_t *quant_matrix,
49 const uint8_t *scantable, int last_dc[3],
50 int16_t *block, int index, int qscale);
51
52 #endif /* AVCODEC_MPEG12DEC_H */
53