FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/wavarc.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 13 71 18.3%
Functions: 1 3 33.3%
Branches: 12 46 26.1%
Line Branch Exec Source
1 /*
2 * WavArc demuxer
3 * Copyright (c) 2023 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/channel_layout.h"
23 #include "libavutil/intreadwrite.h"
24 #include "avformat.h"
25 #include "avio_internal.h"
26 #include "demux.h"
27 #include "internal.h"
28
29 typedef struct WavArcContext {
30 int64_t data_end;
31 } WavArcContext;
32
33 7186 static int wavarc_probe(const AVProbeData *p)
34 {
35 7186 int len = p->buf[0];
36 uint32_t id;
37
38
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 7186 if (len == 0 || len + 6 >= p->buf_size)
39 1434 return 0;
40
41
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 5752 if (p->buf[len + 1] != 0)
42 4649 return 0;
43
44 1103 id = AV_RL32(p->buf + len + 2);
45
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 1103 if (id != MKTAG('0','C','P','Y') &&
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 1103 id != MKTAG('1','D','I','F') &&
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 1103 id != MKTAG('2','S','L','P') &&
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 1103 id != MKTAG('4','A','L','P') &&
50 id != MKTAG('5','E','L','P'))
51 1103 return 0;
52
53 ✗ return AVPROBE_SCORE_MAX / 3 * 2;
54 }
55
56 ✗ static int wavarc_read_header(AVFormatContext *s)
57 {
58 ✗ WavArcContext *w = s->priv_data;
59 ✗ AVIOContext *pb = s->pb;
60 AVCodecParameters *par;
61 int filename_len, fmt_len, ret;
62 uint8_t data[36];
63 AVStream *st;
64 uint32_t id;
65
66 ✗ filename_len = avio_r8(pb);
67 ✗ if (filename_len == 0)
68 ✗ return AVERROR_INVALIDDATA;
69 ✗ avio_skip(pb, filename_len);
70 ✗ if (avio_r8(pb))
71 ✗ return AVERROR_INVALIDDATA;
72 ✗ id = avio_rl32(pb);
73 ✗ w->data_end = avio_tell(pb);
74 ✗ if (avio_read(pb, data, sizeof(data)) != sizeof(data))
75 ✗ return AVERROR(EIO);
76 ✗ w->data_end += 16LL + AV_RL32(data + 4);
77 ✗ fmt_len = AV_RL32(data + 32);
78 ✗ if (fmt_len < 12)
79 ✗ return AVERROR_INVALIDDATA;
80
81 ✗ st = avformat_new_stream(s, NULL);
82 ✗ if (!st)
83 ✗ return AVERROR(ENOMEM);
84 ✗ par = st->codecpar;
85
86 ✗ ret = ff_alloc_extradata(par, fmt_len + sizeof(data));
87 ✗ if (ret < 0)
88 ✗ return ret;
89 ✗ memcpy(par->extradata, data, sizeof(data));
90 ✗ ret = ffio_read_size(pb, par->extradata + sizeof(data), fmt_len);
91 ✗ if (ret < 0)
92 ✗ return ret;
93
94 ✗ par->codec_type = AVMEDIA_TYPE_AUDIO;
95 ✗ par->codec_id = AV_CODEC_ID_WAVARC;
96 ✗ par->codec_tag = id;
97
98 do {
99 ✗ id = avio_rl32(pb);
100 ✗ if (id != MKTAG('d','a','t','a'))
101 ✗ avio_skip(pb, avio_rl32(pb));
102 ✗ } while (id != MKTAG('d','a','t','a') && !avio_feof(pb));
103 ✗ avio_skip(pb, 4);
104
105 ✗ if (AV_RL32(par->extradata + 16) != MKTAG('R','I','F','F'))
106 ✗ return AVERROR_INVALIDDATA;
107 ✗ if (AV_RL32(par->extradata + 24) != MKTAG('W','A','V','E'))
108 ✗ return AVERROR_INVALIDDATA;
109 ✗ if (AV_RL32(par->extradata + 28) != MKTAG('f','m','t',' '))
110 ✗ return AVERROR_INVALIDDATA;
111
112 ✗ av_channel_layout_default(&par->ch_layout, AV_RL16(par->extradata + 38));
113 ✗ par->sample_rate = AV_RL32(par->extradata + 40);
114 ✗ avpriv_set_pts_info(st, 64, 1, par->sample_rate);
115 ✗ st->start_time = 0;
116
117 ✗ return 0;
118 }
119
120 ✗ static int wavarc_read_packet(AVFormatContext *s, AVPacket *pkt)
121 {
122 ✗ WavArcContext *w = s->priv_data;
123 ✗ AVIOContext *pb = s->pb;
124 ✗ int64_t size, left = w->data_end - avio_tell(pb);
125 int ret;
126
127 ✗ size = FFMIN(left, 1024);
128 ✗ if (size <= 0)
129 ✗ return AVERROR_EOF;
130
131 ✗ ret = av_get_packet(pb, pkt, size);
132 ✗ pkt->stream_index = 0;
133 ✗ return ret;
134 }
135
136 const FFInputFormat ff_wavarc_demuxer = {
137 .p.name = "wavarc",
138 .p.long_name = NULL_IF_CONFIG_SMALL("Waveform Archiver"),
139 .p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS,
140 .p.extensions = "wa",
141 .priv_data_size = sizeof(WavArcContext),
142 .read_probe = wavarc_probe,
143 .read_packet = wavarc_read_packet,
144 .read_header = wavarc_read_header,
145 .raw_codec_id = AV_CODEC_ID_WAVARC,
146 };
147