feat: implement initial configuration and gstreamer pipeline setup

internal/gstreamer/debug.go

@@ -0,0 +1,46 @@
+package gstreamer
+
+import (
+	"context"
+	"fmt"
+	"github.com/go-gst/go-gst/gst"
+	"github.com/goccy/go-graphviz"
+	"github.com/goccy/go-graphviz/cgraph"
+)
+
+func gstreamerBinToPNG(bin *gst.Bin, filename string) error {
+	ctx := context.Background()
+	g, err := graphviz.New(ctx)
+	if err != nil {
+		return fmt.Errorf("error creating graphviz context: %w", err)
+	}
+
+	dotString := bin.DebugBinToDotData(gst.DebugGraphShowAll)
+	graph, err := cgraph.ParseBytes([]byte(dotString))
+	if err != nil {
+		return err
+	}
+
+	//graph.SetDPI(150)
+	//setFontSize(graph, 20)
+
+	if err := g.RenderFilename(ctx, graph, graphviz.PNG, filename); err != nil {
+		return fmt.Errorf("error rendering graph: %w", err)
+	}
+
+	return nil
+}
+
+func setFontSize(graph *cgraph.Graph, fontSize float64) {
+	graph.SetFontSize(20)
+	graph.Set("arrowSize", "3")
+	for node, err := graph.FirstNode(); err == nil && node != nil; node, err = graph.NextNode(node) {
+		node.SetFontSize(fontSize)
+		for edge, err := graph.FirstEdge(node); err == nil && edge != nil; edge, err = graph.NextEdge(edge, node) {
+			edge.SetFontSize(fontSize)
+		}
+	}
+	//for subGraph, err := graph.FirstSubGraph(); err == nil && subGraph != nil; subGraph, err = graph.NextSubGraph() {
+	//	setFontSize(subGraph, fontSize)
+	//}
+}