more subclassing code, start to migrate example

examples/plugins/registered_elements/internal/custombin/element.go

@@ -7,14 +7,14 @@ import (
 )
 
 type customBin struct {
-	gst.Bin // parent object must be first embedded field
-	source1 gst.Element
-	source2 gst.Element
-	mixer   gst.Element
+	gst.BinInstance // parent object must be first embedded field
+	source1         gst.Element
+	source2         gst.Element
+	mixer           gst.Element
 }
 
-// init should initialize the element. Keep in mind that the properties are not yet present. When this is called.
-func (bin *customBin) init() {
+// constructed is the method we use to override the GOBject.constructed method.
+func (bin *customBin) constructed() {
 	bin.source1 = gst.ElementFactoryMakeWithProperties("gocustomsrc", map[string]interface{}{
 		"duration": int64(5 * time.Second),
 	})

examples/plugins/registered_elements/internal/custombin/register.go

@@ -1,41 +1,45 @@
 package custombin
 
+import (
+	"github.com/diamondburned/gotk4/pkg/gobject/v2"
+	"github.com/go-gst/go-gst/pkg/gst"
+)
+
 // 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[*customBin](
-	// 	func() *customBin {
-	// 		return &customBin{}
-	// 	},
-	// 	glib.WithOverrides[*customBin, gst.BinOverrides](func(b *customBin) gst.BinOverrides {
-	// 		return gst.BinOverrides{}
-	// 	}),
-	// 	glib.WithClassInit[*gst.BinClass](func(bc *gst.BinClass) {
-	// 		bc.ParentClass().SetStaticMetadata(
-	// 			"custom test source",
-	// 			"Src/Test",
-	// 			"Demo source bin with volume",
-	// 			"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
-	// 		)
+	registered := gst.RegisterBinSubClass[*customBin](
+		"gocustombin",
+		func(class *gst.BinClass) {
+			class.ParentClass().SetStaticMetadata(
+				"custom test source",
+				"Src/Test",
+				"Demo source bin with volume",
+				"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
+			)
+		},
+		nil,
+		gst.BinOverrides[*customBin]{
+			ElementOverrides: gst.ElementOverrides[*customBin]{
+				ObjectOverrides: gst.ObjectOverrides[*customBin]{
+					InitiallyUnownedOverrides: gobject.InitiallyUnownedOverrides[*customBin]{
+						ObjectOverrides: gobject.ObjectOverrides[*customBin]{
+							Constructed: (*customBin).constructed,
+						},
+					},
+				},
+			},
+		},
+		map[string]gobject.SignalDefinition{},
+	)
 
-	// 		bc.ParentClass().AddPadTemplate(gst.NewPadTemplate(
-	// 			"src",
-	// 			gst.PadSrc,
-	// 			gst.PadAlways,
-	// 			gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
-	// 		))
-	// 	}),
-	// )
-
-	// return gst.ElementRegister(
-	// 	// no plugin:
-	// 	nil,
-	// 	// The name of the element
-	// 	"gocustombin",
-	// 	// The rank of the element
-	// 	uint(gst.RankNone),
-	// 	// The GoElement implementation for the element
-	// 	registered.Type(),
-	// )
+	return gst.ElementRegister(
+		// no plugin:
+		nil,
+		// The name of the element
+		"gocustombin",
+		// The rank of the element
+		uint(gst.RankNone),
+		registered,
+	)
 }

examples/plugins/registered_elements/internal/customsrc/element.go

@@ -4,6 +4,7 @@ import (
 	"math"
 	"time"
 
+	"github.com/diamondburned/gotk4/pkg/gobject/v2"
 	"github.com/go-gst/go-gst/pkg/gst"
 )
 
@@ -13,12 +14,12 @@ const samplesperbuffer = 4800
 const samplerate = 48000
 
 type customSrc struct {
-	gst.Bin // parent must be embedded as the first field
+	gst.BinInstance // parent must be embedded as the first field
 
 	source gst.Element
 	volume gst.Element
 
-	Duration time.Duration `glib:"duration"`
+	Duration time.Duration
 }
 
 // InstanceInit should initialize the element. Keep in mind that the properties are not yet present. When this is called.
@@ -45,6 +46,25 @@ func (bin *customSrc) init() {
 	bin.updateSource()
 }
 
+func (bin *customSrc) setProperty(_ uint, value any, pspec *gobject.ParamSpec) {
+	switch pspec.Name() {
+	case "duration":
+		bin.Duration = value.(time.Duration)
+		bin.updateSource()
+	default:
+		panic("unknown property")
+	}
+}
+
+func (bin *customSrc) getProperty(_ uint, pspec *gobject.ParamSpec) any {
+	switch pspec.Name() {
+	case "duration":
+		return bin.Duration
+	default:
+		panic("unknown property")
+	}
+}
+
 // updateSource will get called to update the audiotestsrc when a property changes
 func (s *customSrc) updateSource() {
 	if s.source != nil {

examples/plugins/registered_elements/internal/customsrc/register.go

@@ -1,40 +1,60 @@
 package customsrc
 
+import (
+	"math"
+
+	"github.com/diamondburned/gotk4/pkg/gobject/v2"
+	"github.com/go-gst/go-gst/pkg/gst"
+)
+
 // Register needs to be called after gst.Init() to make the gocustomsrc 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[*customSrc](
-	// 	func() *customSrc {
-	// 		return &customSrc{}
-	// 	},
-	// 	glib.WithOverrides[*customSrc, gst.BinOverrides](func(b *customSrc) gst.BinOverrides {
-	// 		return gst.BinOverrides{}
-	// 	}),
-	// 	glib.WithClassInit[*gst.BinClass](func(bc *gst.BinClass) {
-	// 		bc.ParentClass().SetStaticMetadata(
-	// 			"custom test source",
-	// 			"Src/Test",
-	// 			"Demo source bin with volume",
-	// 			"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
-	// 		)
+	registered := gst.RegisterBinSubClass[*customSrc](
+		"gocustomsrc",
+		func(class *gst.BinClass) {
+			class.ParentClass().SetStaticMetadata(
+				"custom test source",
+				"Src/Test",
+				"Demo source bin with volume",
+				"Wilhelm Bartel <bartel.wilhelm@gmail.com>",
+			)
 
-	// 		bc.ParentClass().AddPadTemplate(gst.NewPadTemplate(
-	// 			"src",
-	// 			gst.PadSrc,
-	// 			gst.PadAlways,
-	// 			gst.CapsFromString("audio/x-raw,channels=2,rate=48000"),
-	// 		))
-	// 	}),
-	// )
+			class.ParentClass().ParentClass().ParentClass().ParentClass().InstallProperties([]*gobject.ParamSpec{
+				gobject.ParamSpecInt(
+					"duration",
+					"Duration",
+					"Duration of the source in nanoseconds",
+					0,
+					math.MaxInt64,
+					0,
+					gobject.ParamWritable|gobject.ParamReadable|gst.ParamMutableReady),
+			})
+		},
+		nil,
+		gst.BinOverrides[*customSrc]{
+			ElementOverrides: gst.ElementOverrides[*customSrc]{
+				ObjectOverrides: gst.ObjectOverrides[*customSrc]{
+					InitiallyUnownedOverrides: gobject.InitiallyUnownedOverrides[*customSrc]{
+						ObjectOverrides: gobject.ObjectOverrides[*customSrc]{
+							Constructed: (*customSrc).init,
+							SetProperty: (*customSrc).setProperty,
+							GetProperty: (*customSrc).getProperty,
+						},
+					},
+				},
+			},
+		},
+		map[string]gobject.SignalDefinition{},
+	)
 
-	// return gst.ElementRegister(
-	// 	// no plugin:
-	// 	nil,
-	// 	// The name of the element
-	// 	"gocustomsrc",
-	// 	// The rank of the element
-	// 	uint(gst.RankNone),
-	// 	registered.Type(),
-	// )
+	return gst.ElementRegister(
+		// no plugin:
+		nil,
+		// The name of the element
+		"gocustomsrc",
+		// The rank of the element
+		uint(gst.RankNone),
+		registered,
+	)
 }

examples/plugins/registered_elements/main.go

@@ -72,6 +72,8 @@ func run(ctx context.Context) error {
 				fmt.Println("reached EOS")
 				cancel()
 				return
+			default:
+				fmt.Println("got message:", msg.String())
 			}
 
 			return