Hiroshi HorieandGitHub
ab31ddabb9
* Add flutter_lints package * Use key in widget constructors lint: use_key_in_widget_constructors * Unnecessary new keyword lint: unnecessary_new * Prefer const with constant constructors * Exclude protobuf files from analyzer * Private field could be final * Annotate overridden members * Use initializing formals when possible * Don't access members with `this` unless avoiding shadowing * Prefer is! operator * Use isEmpty instead of length * Use collection literals when possible * Revert comment changes * Cleaner null testing * Misc fixes * Avoid using `forEach` with a function literal * Prefer `final` over `var` where applicable * Enforce stricter type-checking * Ignore VS Code files * Flutter format * Prefer using lowerCamelCase for constant names * flutter format -l 100 * Disable `avoid_print` for examples * Slight improvements to example Should solve lint error: no_logic_in_create_state
67 lines
2.0 KiB
Dart
67 lines
2.0 KiB
Dart
import 'package:flutter_webrtc/flutter_webrtc.dart';
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import '../errors.dart';
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import 'options.dart';
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import 'video_track.dart';
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/// A video track from the local device. Use static methods in this class to create
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/// video tracks.
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class LocalVideoTrack extends VideoTrack {
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RTCRtpSender? get sender => transceiver?.sender;
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LocalVideoTrack(String name, MediaStreamTrack mediaTrack, MediaStream stream)
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: super(name, mediaTrack, stream);
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/// Creates a LocalVideoTrack from camera input.
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static Future<LocalVideoTrack> createCameraTrack([LocalVideoTrackOptions? options]) async {
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options ??= LocalVideoTrackOptions(params: VideoPresets.qhd);
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try {
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final stream = await _createCameraStream(options);
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return LocalVideoTrack('camera', stream.getVideoTracks().first, stream);
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} catch (e) {
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return Future.error(e);
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}
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}
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/// Restarts the track with new options. This is useful when switching between
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/// front and back cameras.
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Future<void> restartTrack([LocalVideoTrackOptions? options]) async {
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if (sender == null) {
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return Future.error(TrackCreateError('could not restart track'));
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}
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options ??= LocalVideoTrackOptions(params: VideoPresets.qhd);
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try {
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final stream = await _createCameraStream(options);
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final track = stream.getVideoTracks().first;
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mediaStream = stream;
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await mediaTrack.stop();
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mediaTrack = track;
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await sender?.replaceTrack(track);
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} catch (e) {
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return Future.error(e);
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}
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}
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static Future<MediaStream> _createCameraStream(LocalVideoTrackOptions? options) async {
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options ??= LocalVideoTrackOptions(params: VideoPresets.qhd);
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try {
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final stream = await navigator.mediaDevices.getUserMedia(<String, dynamic>{
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'audio': false,
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'video': options.mediaConstraints,
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});
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if (stream.getVideoTracks().isEmpty) {
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return Future.error(TrackCreateError());
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}
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return stream;
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} catch (e) {
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return Future.error(e);
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}
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}
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}
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