69 lines
1.9 KiB
Dart
69 lines
1.9 KiB
Dart
import 'package:xml/xml.dart' as xml;
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import '../../retry.dart';
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import '../reverse_engineering.dart';
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import 'stream_info_provider.dart';
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class DashManifest {
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static final _urlSignatureExp = RegExp(r'/s/(.*?)(?:/|$)');
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final xml.XmlDocument _root;
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DashManifest(this._root);
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Iterable<_StreamInfo> get streams => _root
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.findElements('Representation')
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.where((e) => e
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.findElements('Initialization')
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.first
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.getAttribute('sourceURL')
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.contains('sq/'))
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.map((e) => _StreamInfo(e));
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DashManifest.parse(String raw) : _root = xml.parse(raw);
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static Future<DashManifest> get(YoutubeHttpClient httpClient, dynamic url) {
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retry(() async {
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var raw = await httpClient.getString(url);
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return DashManifest.parse(raw);
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});
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}
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static String getSignatureFromUrl(String url) =>
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_urlSignatureExp.firstMatch(url)?.group(1);
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}
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class _StreamInfo extends StreamInfoProvider {
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static final _contentLenExp = RegExp(r'clen[/=](\d+)');
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static final _containerExp = RegExp(r'mime[/=]\w*%2F([\w\d]*)');
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final xml.XmlElement _root;
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_StreamInfo(this._root);
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int get tag => int.parse(_root.getAttribute('id'));
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String get url => _root.getAttribute('BaseURL');
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int get contentLength => int.parse(_root.getAttribute('contentLength') ??
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_contentLenExp.firstMatch(url).group(1));
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int get bitrate => int.parse(_root.getAttribute('bandwidth'));
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String get container =>
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Uri.decodeFull(_containerExp.firstMatch(url).group(1));
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bool get isAudioOnly =>
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_root.findElements('AudioChannelConfiguration').isNotEmpty;
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String get audioCodec => isAudioOnly ? null : _root.getAttribute('codecs');
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String get videoCodec => isAudioOnly ? _root.getAttribute('codecs') : null;
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int get videoWidth => int.parse(_root.getAttribute('width'));
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int get videoHeight => int.parse(_root.getAttribute('height'));
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int get framerate => int.parse(_root.getAttribute('framerate'));
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}
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