FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/epafdec.c
Date: 2022-12-05 20:26:17
Exec Total Coverage
Lines: 4 49 8.2%
Functions: 1 2 50.0%
Branches: 2 38 5.3%

Line Branch Exec Source
1 /*
2 * Ensoniq Paris Audio File demuxer
3 * Copyright (c) 2012 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 "libavcodec/internal.h"
24 #include "avformat.h"
25 #include "internal.h"
26 #include "pcm.h"
27
28 6782 static int epaf_probe(const AVProbeData *p)
29 {
30
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6782 if (((AV_RL32(p->buf) == MKTAG('f','a','p',' ') &&
31 AV_RL32(p->buf + 8) == 1) ||
32
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6782 (AV_RL32(p->buf) == MKTAG(' ','p','a','f') &&
33 AV_RN32(p->buf + 8) == 0)) &&
34 !AV_RN32(p->buf + 4) && AV_RN32(p->buf + 12) &&
35 AV_RN32(p->buf + 20))
36 return AVPROBE_SCORE_MAX / 4 * 3;
37 6782 return 0;
38 }
39
40 static int epaf_read_header(AVFormatContext *s)
41 {
42 int le, sample_rate, codec, channels;
43 AVStream *st;
44
45 avio_skip(s->pb, 4);
46 if (avio_rl32(s->pb))
47 return AVERROR_INVALIDDATA;
48
49 le = avio_rl32(s->pb);
50 if (le && le != 1)
51 return AVERROR_INVALIDDATA;
52
53 if (le) {
54 sample_rate = avio_rl32(s->pb);
55 codec = avio_rl32(s->pb);
56 channels = avio_rl32(s->pb);
57 } else {
58 sample_rate = avio_rb32(s->pb);
59 codec = avio_rb32(s->pb);
60 channels = avio_rb32(s->pb);
61 }
62
63 if (channels <= 0 || channels > FF_SANE_NB_CHANNELS || sample_rate <= 0)
64 return AVERROR_INVALIDDATA;
65
66 st = avformat_new_stream(s, NULL);
67 if (!st)
68 return AVERROR(ENOMEM);
69
70 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
71 st->codecpar->ch_layout.nb_channels = channels;
72 st->codecpar->sample_rate = sample_rate;
73 switch (codec) {
74 case 0:
75 st->codecpar->codec_id = le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE;
76 break;
77 case 2:
78 st->codecpar->codec_id = AV_CODEC_ID_PCM_S8;
79 break;
80 case 1:
81 avpriv_request_sample(s, "24-bit Paris PCM format");
82 default:
83 return AVERROR_INVALIDDATA;
84 }
85
86 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
87 st->codecpar->block_align = st->codecpar->bits_per_coded_sample *
88 st->codecpar->ch_layout.nb_channels / 8;
89
90 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
91
92 if (avio_skip(s->pb, 2024) < 0)
93 return AVERROR_INVALIDDATA;
94 return 0;
95 }
96
97 const AVInputFormat ff_epaf_demuxer = {
98 .name = "epaf",
99 .long_name = NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"),
100 .read_probe = epaf_probe,
101 .read_header = epaf_read_header,
102 .read_packet = ff_pcm_read_packet,
103 .read_seek = ff_pcm_read_seek,
104 .extensions = "paf,fap",
105 .flags = AVFMT_GENERIC_INDEX,
106 };
107