FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/wsddec.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 3 97 3.1%
Functions: 1 5 20.0%
Branches: 3 54 5.6%
Line Branch Exec Source
1 /*
2 * Wideband Single-bit Data (WSD) demuxer
3 * Copyright (c) 2014 Peter Ross
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 "libavutil/mem.h"
25 #include "libavutil/timecode.h"
26 #include "avformat.h"
27 #include "demux.h"
28 #include "rawdec.h"
29
30 7186 static int wsd_probe(const AVProbeData *p)
31 {
32
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 7186 if (p->buf_size < 45 || memcmp(p->buf, "1bit", 4) ||
33 ✗ !AV_RB32(p->buf + 36) || !p->buf[44] ||
34 ✗ (p->buf[0] >= 0x10 && (AV_RB32(p->buf + 20) < 0x80 || AV_RB32(p->buf + 24) < 0x80)))
35 7186 return 0;
36 ✗ return AVPROBE_SCORE_MAX;
37 }
38
39 ✗ static int empty_string(const char *buf, unsigned size)
40 {
41 ✗ while (size--) {
42 ✗ if (*buf++ != ' ')
43 ✗ return 0;
44 }
45 ✗ return 1;
46 }
47
48 ✗ static int wsd_to_av_channel_layoyt(AVFormatContext *s, int bit)
49 {
50 ✗ switch (bit) {
51 ✗ case 2: return AV_CH_BACK_RIGHT;
52 ✗ case 3:
53 ✗ avpriv_request_sample(s, "Rr-middle");
54 ✗ break;
55 ✗ case 4: return AV_CH_BACK_CENTER;
56 ✗ case 5:
57 ✗ avpriv_request_sample(s, "Lr-middle");
58 ✗ break;
59 ✗ case 6: return AV_CH_BACK_LEFT;
60 ✗ case 24: return AV_CH_LOW_FREQUENCY;
61 ✗ case 26: return AV_CH_FRONT_RIGHT;
62 ✗ case 27: return AV_CH_FRONT_RIGHT_OF_CENTER;
63 ✗ case 28: return AV_CH_FRONT_CENTER;
64 ✗ case 29: return AV_CH_FRONT_LEFT_OF_CENTER;
65 ✗ case 30: return AV_CH_FRONT_LEFT;
66 ✗ default:
67 ✗ av_log(s, AV_LOG_WARNING, "reserved channel assignment\n");
68 ✗ break;
69 }
70 ✗ return 0;
71 }
72
73 ✗ static int get_metadata(AVFormatContext *s, const char *const tag, const unsigned size)
74 {
75 uint8_t *buf;
76 ✗ if (!(size + 1))
77 ✗ return AVERROR(ENOMEM);
78
79 ✗ buf = av_malloc(size + 1);
80 ✗ if (!buf)
81 ✗ return AVERROR(ENOMEM);
82
83 ✗ if (avio_read(s->pb, buf, size) != size) {
84 ✗ av_free(buf);
85 ✗ return AVERROR(EIO);
86 }
87
88 ✗ if (empty_string(buf, size)) {
89 ✗ av_free(buf);
90 ✗ return 0;
91 }
92
93 ✗ buf[size] = 0;
94 ✗ av_dict_set(&s->metadata, tag, buf, AV_DICT_DONT_STRDUP_VAL);
95 ✗ return 0;
96 }
97
98 ✗ static int wsd_read_header(AVFormatContext *s)
99 {
100 ✗ AVIOContext *pb = s->pb;
101 AVStream *st;
102 int version;
103 uint32_t text_offset, data_offset, channel_assign;
104 char playback_time[AV_TIMECODE_STR_SIZE];
105
106 ✗ st = avformat_new_stream(s, NULL);
107 ✗ if (!st)
108 ✗ return AVERROR(ENOMEM);
109
110 ✗ avio_skip(pb, 8);
111 ✗ version = avio_r8(pb);
112 ✗ av_log(s, AV_LOG_DEBUG, "version: %i.%i\n", version >> 4, version & 0xF);
113 ✗ avio_skip(pb, 11);
114
115 ✗ if (version < 0x10) {
116 ✗ text_offset = 0x80;
117 ✗ data_offset = 0x800;
118 ✗ avio_skip(pb, 8);
119 } else {
120 ✗ text_offset = avio_rb32(pb);
121 ✗ data_offset = avio_rb32(pb);
122 }
123
124 ✗ avio_skip(pb, 4);
125 ✗ av_timecode_make_smpte_tc_string2(playback_time, (AVRational){1,1}, avio_rb32(pb) & 0x00ffffffU, 1, 1);
126 ✗ av_dict_set(&s->metadata, "playback_time", playback_time, 0);
127
128 ✗ st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
129 ✗ st->codecpar->codec_id = AV_CODEC_ID_DSD_MSBF;
130 ✗ st->codecpar->sample_rate = avio_rb32(pb) / 8;
131 ✗ avio_skip(pb, 4);
132 ✗ st->codecpar->ch_layout.nb_channels = avio_r8(pb) & 0xF;
133 ✗ st->codecpar->bit_rate = (int64_t)st->codecpar->ch_layout.nb_channels *
134 ✗ st->codecpar->sample_rate * 8LL;
135 ✗ if (!st->codecpar->ch_layout.nb_channels)
136 ✗ return AVERROR_INVALIDDATA;
137
138 ✗ avio_skip(pb, 3);
139 ✗ channel_assign = avio_rb32(pb);
140 ✗ if (!(channel_assign & 1)) {
141 ✗ uint64_t ch_mask = 0;
142 int i;
143 ✗ for (i = 1; i < 32; i++)
144 ✗ if ((channel_assign >> i) & 1)
145 ✗ ch_mask |= wsd_to_av_channel_layoyt(s, i);
146 ✗ av_channel_layout_from_mask(&st->codecpar->ch_layout, ch_mask);
147 }
148
149 ✗ avio_skip(pb, 16);
150 ✗ if (avio_rb32(pb))
151 ✗ avpriv_request_sample(s, "emphasis");
152
153 ✗ if (avio_seek(pb, text_offset, SEEK_SET) >= 0) {
154 ✗ get_metadata(s, "title", 128);
155 ✗ get_metadata(s, "composer", 128);
156 ✗ get_metadata(s, "song_writer", 128);
157 ✗ get_metadata(s, "artist", 128);
158 ✗ get_metadata(s, "album", 128);
159 ✗ get_metadata(s, "genre", 32);
160 ✗ get_metadata(s, "date", 32);
161 ✗ get_metadata(s, "location", 32);
162 ✗ get_metadata(s, "comment", 512);
163 ✗ get_metadata(s, "user", 512);
164 }
165
166 ✗ return avio_seek(pb, data_offset, SEEK_SET);
167 }
168
169 const FFInputFormat ff_wsd_demuxer = {
170 .p.name = "wsd",
171 .p.long_name = NULL_IF_CONFIG_SMALL("Wideband Single-bit Data (WSD)"),
172 .p.extensions = "wsd",
173 .p.flags = AVFMT_GENERIC_INDEX | AVFMT_NO_BYTE_SEEK,
174 .p.priv_class = &ff_raw_demuxer_class,
175 .read_probe = wsd_probe,
176 .read_header = wsd_read_header,
177 .read_packet = ff_raw_read_partial_packet,
178 .raw_codec_id = AV_CODEC_ID_DSD_MSBF,
179 .priv_data_size = sizeof(FFRawDemuxerContext),
180 };
181