FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/apac.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 3 35 8.6%
Functions: 1 2 50.0%
Branches: 1 18 5.6%

Line Branch Exec Source
1 /*
2 * APAC demuxer
3 * Copyright (c) 2022 Paul B Mahol
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 #include "libavutil/intreadwrite.h"
23 #include "avformat.h"
24 #include "demux.h"
25 #include "internal.h"
26 #include "rawdec.h"
27
28 6782 static int apac_probe(const AVProbeData *p)
29 {
30
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6782 if (AV_RB32(p->buf) == MKBETAG('A','P','A','C') &&
31 AV_RB32(p->buf + 8) == MKBETAG('P','R','O','F') &&
32 AV_RB32(p->buf + 12) == MKBETAG('N','A','D',' '))
33 return AVPROBE_SCORE_MAX;
34
35 6782 return 0;
36 }
37
38 static int apac_read_header(AVFormatContext *s)
39 {
40 AVIOContext *pb = s->pb;
41 uint32_t chunk_size;
42 AVStream *st;
43 int64_t pos;
44
45 avio_skip(pb, 16);
46 chunk_size = avio_rl32(pb);
47 avio_skip(pb, chunk_size);
48 if (avio_rb32(pb) != MKBETAG('P','F','M','T'))
49 return AVERROR_INVALIDDATA;
50 chunk_size = avio_rl32(pb);
51 pos = avio_tell(pb);
52 avio_skip(pb, 2);
53 st = avformat_new_stream(s, NULL);
54 if (!st)
55 return AVERROR(ENOMEM);
56 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
57 st->codecpar->codec_id = AV_CODEC_ID_APAC;
58 st->codecpar->ch_layout.nb_channels = avio_rl16(pb);
59 st->codecpar->sample_rate = avio_rl32(pb);
60 if (st->codecpar->ch_layout.nb_channels <= 0 ||
61 st->codecpar->ch_layout.nb_channels > 2 ||
62 st->codecpar->sample_rate <= 0)
63 return AVERROR_INVALIDDATA;
64 avio_skip(pb, 2);
65 st->codecpar->bits_per_coded_sample = avio_rl16(pb);
66 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
67 avio_skip(pb, (chunk_size + pos) - avio_tell(pb) + (chunk_size & 1));
68 if (avio_rb32(pb) != MKBETAG('P','A','D',' '))
69 return AVERROR_INVALIDDATA;
70 avio_skip(pb, 4);
71
72 return 0;
73 }
74
75 const AVInputFormat ff_apac_demuxer = {
76 .name = "apac",
77 .long_name = NULL_IF_CONFIG_SMALL("raw APAC"),
78 .read_probe = apac_probe,
79 .read_header = apac_read_header,
80 .read_packet = ff_raw_read_partial_packet,
81 .extensions = "apc",
82 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,
83 .raw_codec_id = AV_CODEC_ID_APAC,
84 .priv_data_size = sizeof(FFRawDemuxerContext),
85 .priv_class = &ff_raw_demuxer_class,
86 };
87