Initial commit

lib/flutter_gstreamer_player.dart

@@ -0,0 +1,74 @@
+
+import 'dart:async';
+
+import 'package:flutter/services.dart';
+import 'package:flutter/material.dart';
+
+class GstPlayerTextureController {
+  static const MethodChannel _channel = MethodChannel('flutter_gstreamer_player');
+
+  late int textureId;
+  static int _id = 0;
+
+  Future<int> initialize(String pipeline) async {
+    // No idea why, but you have to increase `_id` first before pass it to method channel,
+    // if not, receiver of method channel always received 0
+    GstPlayerTextureController._id = GstPlayerTextureController._id + 1;
+
+    textureId = await _channel.invokeMethod('PlayerRegisterTexture', {
+      'pipeline': pipeline,
+      'playerId': GstPlayerTextureController._id,
+    });
+
+    return textureId;
+  }
+
+  Future<Null> dispose() {
+      return _channel.invokeMethod('dispose', {'textureId': textureId});
+  }
+
+  bool get isInitialized => textureId != null;
+}
+
+class GstPlayer extends StatefulWidget {
+  String pipeline;
+
+  GstPlayer({Key? key, required this.pipeline}) : super(key: key);
+
+  @override
+  State<GstPlayer> createState() => _GstPlayerState();
+}
+
+class _GstPlayerState extends State<GstPlayer> {
+  final _controller = GstPlayerTextureController();
+
+  @override
+  void initState() {
+    initializeController();
+    super.initState();
+  }
+
+  @override
+  void didUpdateWidget(GstPlayer oldWidget) {
+    if (widget.pipeline != oldWidget.pipeline) {
+      initializeController();
+    }
+    super.didUpdateWidget(oldWidget);
+  }
+
+  Future<Null> initializeController() async {
+    await _controller.initialize(
+      widget.pipeline,
+    );
+    setState(() {});
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      child: _controller.isInitialized
+        ? Texture(textureId: _controller.textureId)
+        : null,
+    );
+  }
+}