1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2023 metamuffin <metamuffin.org>
*/
pub mod seek_index;
use anyhow::{anyhow, bail, Result};
use jellycommon::{LocalTrack, SourceTrack, SourceTrackKind};
use jellymatroska::{
matroska::MatroskaTag,
read::EbmlReader,
unflatten::{IterWithPos, Unflat, Unflatten},
};
use log::{debug, error, info, warn};
use std::path::PathBuf;
#[derive(Default)]
pub struct MatroskaMetadata {
pub title: Option<String>,
pub description: Option<String>,
pub tagline: Option<String>,
pub tracks: Vec<SourceTrack>,
pub track_sources: Vec<LocalTrack>,
pub image: Option<(String, Vec<u8>)>,
pub duration: f64,
}
pub fn import_metadata(input: &mut EbmlReader) -> Result<MatroskaMetadata> {
let mut m = None;
while let Some(item) = input.next() {
let item = match item {
Ok(item) => item,
Err(e) => {
warn!("{e}");
break;
}
};
match item {
MatroskaTag::Ebml(_) => {
let mut iter = Unflatten::new_with_end(input, item);
while let Some(Ok(Unflat {
children: _, item, ..
})) = iter.n()
{
match item {
MatroskaTag::DocType(t) => {
if !matches!(t.as_str(), "matroska" | "webm") {
error!("file is neither matroska nor webm but {:?}", t)
}
}
_ => debug!("(re) tag ignored: {item:?}"),
}
}
}
MatroskaTag::Segment(_) => {
info!("segment start");
let mut children = Unflatten::new_with_end(input, item);
m = Some(import_read_segment(&mut children)?);
info!("segment end");
}
_ => debug!("(r) tag ignored: {item:?}"),
}
}
Ok(m.ok_or(anyhow!("no segment"))?)
}
fn import_read_segment(segment: &mut Unflatten) -> Result<MatroskaMetadata> {
let (mut timestamp_scale, mut duration) = (None, None);
let mut m = MatroskaMetadata::default();
while let Some(Ok(Unflat { children, item, .. })) = segment.n() {
match item {
MatroskaTag::SeekHead(_) => {}
MatroskaTag::Info(_) => {
let mut children = children.unwrap();
while let Some(Ok(Unflat {
children: _, item, ..
})) = children.n()
{
match item {
MatroskaTag::Title(t) => m.title = Some(t),
MatroskaTag::TimestampScale(v) => timestamp_scale = Some(v),
MatroskaTag::Duration(v) => duration = Some(v),
_ => debug!("(rsi) tag ignored: {item:?}"),
}
}
}
MatroskaTag::Tags(_) => {
let mut children = children.unwrap();
while let Some(Ok(Unflat { children, item, .. })) = children.n() {
match item {
MatroskaTag::Tag(_) => {
let mut children = children.unwrap();
while let Some(Ok(Unflat { children, item, .. })) = children.n() {
match item {
MatroskaTag::SimpleTag(_) => {
let (mut key, mut value) = (None, None);
let mut children = children.unwrap();
while let Some(Ok(Unflat {
children: _, item, ..
})) = children.n()
{
match item {
MatroskaTag::TagName(k) => key = Some(k),
MatroskaTag::TagString(v) => value = Some(v),
_ => debug!("(rstts) tag ignored: {item:?}"),
}
}
match (key, value) {
(Some(key), Some(value)) => match key.as_str() {
"DESCRIPTION" => m.description = Some(value),
"COMMENT" => m.tagline = Some(value),
_ => debug!("simple tag ignored: {key:?}"),
},
(None, None) => (),
_ => warn!("simple tag with only one of name/string"),
}
}
_ => debug!("(rstt) tag ignored: {item:?}"),
}
}
}
_ => debug!("(rst) tag ignored: {item:?}"),
}
}
}
MatroskaTag::Cues(_) => {}
MatroskaTag::Chapters(_) => {}
MatroskaTag::Tracks(_) => {
let mut children = children.unwrap();
while let Some(Ok(Unflat { children, item, .. })) = children.n() {
match item {
MatroskaTag::TrackEntry(_) => {
let mut children = children.unwrap();
let (
mut index,
mut language,
mut codec,
mut kind,
mut sample_rate,
mut channels,
mut width,
mut height,
mut name,
mut fps,
mut bit_depth,
mut codec_private,
mut default_duration,
) = (
None, None, None, None, None, None, None, None, None, None, None,
None, None,
);
while let Some(Ok(Unflat { children, item, .. })) = children.n() {
match item {
MatroskaTag::CodecID(b) => codec = Some(b),
MatroskaTag::Language(v) => language = Some(v),
MatroskaTag::TrackNumber(v) => index = Some(v),
MatroskaTag::TrackType(v) => kind = Some(v),
MatroskaTag::Name(v) => name = Some(v),
MatroskaTag::CodecPrivate(v) => codec_private = Some(v),
MatroskaTag::DefaultDuration(v) => default_duration = Some(v),
MatroskaTag::Audio(_) => {
let mut children = children.unwrap();
while let Some(Ok(Unflat { item, .. })) = children.n() {
match item {
MatroskaTag::Channels(v) => {
channels = Some(v as usize)
}
MatroskaTag::SamplingFrequency(v) => {
sample_rate = Some(v)
}
MatroskaTag::BitDepth(v) => bit_depth = Some(v),
_ => (),
}
}
}
MatroskaTag::Video(_) => {
let mut children = children.unwrap();
while let Some(Ok(Unflat { item, .. })) = children.n() {
match item {
MatroskaTag::PixelWidth(v) => width = Some(v),
MatroskaTag::PixelHeight(v) => height = Some(v),
MatroskaTag::FrameRate(v) => fps = Some(v),
_ => (),
}
}
}
_ => (),
}
}
let track_index = index.unwrap();
let kind = match kind.ok_or(anyhow!("track type required"))? {
1 => SourceTrackKind::Video {
fps: fps.unwrap_or(0.0), // TODO
width: width.unwrap(),
height: height.unwrap(),
},
2 => SourceTrackKind::Audio {
bit_depth: bit_depth.unwrap_or(0) as usize, // TODO
channels: channels.unwrap(),
sample_rate: sample_rate.unwrap(),
},
17 => SourceTrackKind::Subtitles,
_ => bail!("invalid track type"),
};
m.tracks.push(SourceTrack {
default_duration,
name: name.unwrap_or_else(|| "unnamed".to_string()),
codec: codec.unwrap(),
language: language.unwrap_or_else(|| "none".to_string()),
kind,
});
m.track_sources.push(LocalTrack {
track: track_index as usize,
path: PathBuf::new(),
codec_private,
})
}
_ => debug!("(rst) tag ignored: {item:?}"),
}
}
}
MatroskaTag::Cluster(_) => {}
_ => debug!("(rs) tag ignored: {item:?}"),
};
}
if let Some(duration) = duration {
m.duration = (duration * timestamp_scale.unwrap_or(1_000_000) as f64) / 1_000_000_000_f64;
}
Ok(m)
}
|
