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Dart package to discover and connect with Chromecast devices

cast #

Dart package to discover and connect with Chromecast devices

Installation #

Add this to your package's pubspec.yaml file:

dependencies:
  cast: ^1.1.0

iOS #

Since iOS 14 a few more steps are required https://developers.google.com/cast/docs/ios_sender/ios_permissions_changes

In ios/Runner/Info.plist add:

<key>NSBonjourServices</key>
<array>
  <string>_googlecast._tcp</string>
  <string>_YOUR_APP_ID._googlecast._tcp</string>
</array>

<key>NSLocalNetworkUsageDescription</key>
<string>${PRODUCT_NAME} uses the local network to discover Cast-enabled devices on your WiFi
network.</string>

Usage #

List devices:

Widget build(BuildContext context) {
  return FutureBuilder<List<CastDevice>>(
    future: CastDiscoveryService().search(),
    builder: (context, snapshot) {
      if (snapshot.hasError) {
        return Center(
          child: Text(
            'Error: ${snapshot.error.toString()}',
          ),
        );
      } else if (!snapshot.hasData) {
        return Center(
          child: CircularProgressIndicator(),
        );
      }

      if (snapshot.data!.isEmpty) {
        return Column(
          children: [
            Center(
              child: Text(
                'No Chromecast founded',
              ),
            ),
          ],
        );
      }

      return Column(
        children: snapshot.data!.map((device) {
          return ListTile(
            title: Text(device.name),
            onTap: () {
              _connectToYourApp(context, device);
            },
          );
        }).toList(),
      );
    },
  );
}

Connect to device:

Future<void> _connect(BuildContext context, CastDevice object) async {
  final session = await CastSessionManager().startSession(object);

  session.stateStream.listen((state) {
    if (state == CastSessionState.connected) {
      _sendMessage(session);
    }
  });

  session.messageStream.listen((message) {
    print('receive message: $message');
  });

  session.sendMessage(CastSession.kNamespaceReceiver, {
    'type': 'LAUNCH',
    'appId': 'YouTube', // set the appId of your app here
  });
}

CastSessionManager is used to keep track of all sessions.

Send message:

void _sendMessage(CastSession session) {
  session.sendMessage('urn:x-cast:namespace-of-the-app', {
    'type': 'sample',
  });
}

Except for the launch message, you should wait until the session have a connected state before sending message.

Note #

Some informations about the protocol used https://docs.rs/crate/gcast/0.1.5/source/PROTOCOL.md

$ pub global activate protoc_plugin
$ export PATH="$PATH":"$HOME/.pub-cache/bin"
$ protoc -I=./lib/cast_channel --dart_out=./lib/cast_channel ./lib/cast_channel/cast_channel.proto --plugin "pub run protoc_plugin"

Author #

57
likes
110
pub points
88%
popularity

Publisher

verified publisher iconeivo.co

Dart package to discover and connect with Chromecast devices

Repository (GitHub)

Documentation

API reference

License

Icon for licenses.MIT (LICENSE)

Dependencies

bonsoir, flutter, protobuf

More

Packages that depend on cast