FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/ircamdec.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 33 46 71.7%
Functions: 2 2 100.0%
Branches: 18 42 42.9%

Line Branch Exec Source
1 /*
2 * IRCAM 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 #include "ircam.h"
28
29 6782 static int ircam_probe(const AVProbeData *p)
30 {
31
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6782 if ((p->buf[0] == 0x64 && p->buf[1] == 0xA3 && p->buf[3] == 0x00 &&
32
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1 p->buf[2] >= 1 && p->buf[2] <= 4) ||
33
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6781 (p->buf[3] == 0x64 && p->buf[2] == 0xA3 && p->buf[0] == 0x00 &&
34 p->buf[1] >= 1 && p->buf[1] <= 3) &&
35 AV_RN32(p->buf + 4) && AV_RN32(p->buf + 8))
36 1 return AVPROBE_SCORE_MAX / 4 * 3;
37 6781 return 0;
38 }
39
40 static const struct endianess {
41 uint32_t magic;
42 int is_le;
43 } table[] = {
44 { 0x64A30100, 0 },
45 { 0x64A30200, 1 },
46 { 0x64A30300, 0 },
47 { 0x64A30400, 1 },
48 { 0x0001A364, 1 },
49 { 0x0002A364, 0 },
50 { 0x0003A364, 1 },
51 };
52
53 1 static int ircam_read_header(AVFormatContext *s)
54 {
55 uint32_t magic, sample_rate, channels, tag;
56 const AVCodecTag *tags;
57 1 int le = -1, i;
58 AVStream *st;
59
60 1 magic = avio_rl32(s->pb);
61
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5 for (i = 0; i < 7; i++) {
62
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5 if (magic == table[i].magic) {
63 1 le = table[i].is_le;
64 1 break;
65 }
66 }
67
68
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1 if (le == 1) {
69 1 sample_rate = lrintf(av_int2float(avio_rl32(s->pb)));
70 1 channels = avio_rl32(s->pb);
71 1 tag = avio_rl32(s->pb);
72 1 tags = ff_codec_ircam_le_tags;
73 } else if (le == 0) {
74 sample_rate = lrintf(av_int2float(avio_rb32(s->pb)));
75 channels = avio_rb32(s->pb);
76 tag = avio_rb32(s->pb);
77 tags = ff_codec_ircam_be_tags;
78 } else {
79 return AVERROR_INVALIDDATA;
80 }
81
82
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1 if (!channels || !sample_rate)
83 return AVERROR_INVALIDDATA;
84
85 1 st = avformat_new_stream(s, NULL);
86
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1 if (!st)
87 return AVERROR(ENOMEM);
88
89 1 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
90 1 st->codecpar->ch_layout.nb_channels = channels;
91
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1 if (st->codecpar->ch_layout.nb_channels > FF_SANE_NB_CHANNELS)
92 return AVERROR(ENOSYS);
93 1 st->codecpar->sample_rate = sample_rate;
94
95 1 st->codecpar->codec_id = ff_codec_get_id(tags, tag);
96
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1 if (st->codecpar->codec_id == AV_CODEC_ID_NONE) {
97 av_log(s, AV_LOG_ERROR, "unknown tag %"PRIx32"\n", tag);
98 return AVERROR_INVALIDDATA;
99 }
100
101 1 st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
102 1 st->codecpar->block_align = st->codecpar->bits_per_coded_sample *
103 1 st->codecpar->ch_layout.nb_channels / 8;
104 1 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
105 1 avio_skip(s->pb, 1008);
106
107 1 return 0;
108 }
109
110 const AVInputFormat ff_ircam_demuxer = {
111 .name = "ircam",
112 .long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
113 .read_probe = ircam_probe,
114 .read_header = ircam_read_header,
115 .read_packet = ff_pcm_read_packet,
116 .read_seek = ff_pcm_read_seek,
117 .extensions = "sf,ircam",
118 .flags = AVFMT_GENERIC_INDEX,
119 };
120