regenerate, remove interface virtuals, manually implement BusSyncHandler

* correctly borrow Message Source
* prevent leaks in Bus.Messages() by changing (un-)reffing

examples/plugins/basetransform/internal/customtransform/element.go

@@ -1,5 +1,32 @@
 package customtransform
 
-// type customBaseTransform struct {
-// 	gstbase.BaseTransform
-// }
+import (
+	"github.com/go-gst/go-gst/pkg/gst"
+	"github.com/go-gst/go-gst/pkg/gstbase"
+)
+
+type customBaseTransform struct {
+	gstbase.BaseTransformInstance
+}
+
+func classInit(class *gstbase.BaseTransformClass) {
+	class.ParentClass().SetStaticMetadata(
+		"custom base transform",
+		"Transform/demo",
+		"custom base transform",
+		"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
+	)
+
+	class.ParentClass().AddPadTemplate(gst.NewPadTemplate(
+		"src",
+		gst.PadSrc,
+		gst.PadAlways,
+		gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
+	))
+	class.ParentClass().AddPadTemplate(gst.NewPadTemplate(
+		"sink",
+		gst.PadSink,
+		gst.PadAlways,
+		gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
+	))
+}

examples/plugins/basetransform/internal/customtransform/register.go

@@ -1,46 +1,28 @@
 package customtransform
 
+import (
+	"github.com/go-gst/go-gst/pkg/gst"
+	"github.com/go-gst/go-gst/pkg/gstbase"
+)
+
 // Register needs to be called after gst.Init() to make the gocustombin available in the standard
 // gst element registry. After this call the element can be used like any other gstreamer element
 func Register() bool {
-	panic("Register is not implemented yet")
-	// registered := glib.RegisterSubclassWithConstructor[*customBaseTransform](
-	// 	func() *customBaseTransform {
-	// 		return &customBaseTransform{}
-	// 	},
-	// 	glib.WithOverrides[*customBaseTransform, gstbase.BaseTransformOverrides](func(b *customBaseTransform) gstbase.BaseTransformOverrides {
-	// 		return gstbase.BaseTransformOverrides{}
-	// 	}),
-	// 	glib.WithClassInit[*gstbase.BaseTransformClass](func(class *gstbase.BaseTransformClass) {
-	// 		class.ParentClass().SetStaticMetadata(
-	// 			"custom base transform",
-	// 			"Transform/demo",
-	// 			"custom base transform",
-	// 			"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
-	// 		)
+	registered := gstbase.RegisterBaseTransformSubClass[*customBaseTransform](
+		"gocustomtransform",
+		classInit,
+		nil, // no constructor
+		gstbase.BaseTransformOverrides[*customBaseTransform]{},
+		nil, // no signals
+	)
 
-	// 		class.ParentClass().AddPadTemplate(gst.NewPadTemplate(
-	// 			"src",
-	// 			gst.PadSrc,
-	// 			gst.PadAlways,
-	// 			gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
-	// 		))
-	// 		class.ParentClass().AddPadTemplate(gst.NewPadTemplate(
-	// 			"sink",
-	// 			gst.PadSink,
-	// 			gst.PadAlways,
-	// 			gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
-	// 		))
-	// 	}),
-	// )
-
-	// return gst.ElementRegister(
-	// 	// no plugin:
-	// 	nil,
-	// 	// The name of the element
-	// 	"gocustomtransform",
-	// 	// The rank of the element
-	// 	uint(gst.RankNone),
-	// 	registered.Type(),
-	// )
+	return gst.ElementRegister(
+		// no plugin:
+		nil,
+		// The name of the element
+		"gocustomtransform",
+		// The rank of the element
+		uint(gst.RankNone),
+		registered,
+	)
 }

examples/plugins/basetransform/main.go

@@ -5,8 +5,10 @@ import (
 	"fmt"
 	"os"
 	"os/signal"
+	"runtime"
 	"time"
 
+	"github.com/diamondburned/gotk4/pkg/core/profile"
 	"github.com/go-gst/go-gst/examples/plugins/basetransform/internal/customtransform"
 	"github.com/go-gst/go-gst/pkg/gst"
 )
@@ -37,10 +39,21 @@ func run(ctx context.Context) error {
 }
 
 func main() {
-	ctx := context.Background()
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
 
 	err := run(ctx)
 
+	for range 10 {
+		runtime.GC()
+	}
+
+	if profile.Count() > 0 {
+		fmt.Fprintf(os.Stderr, "Memory leak detected: %d objects still tracked\n", profile.Count())
+	} else {
+		fmt.Fprintln(os.Stderr, "No memory leaks detected")
+	}
+
 	if err != nil {
 		fmt.Fprintln(os.Stderr, err)
 	}