and the video comes into chat

cmd/mxl-reader/main.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"mxl-player/internal/source"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+)
+
+func main() {
+	domain := flag.String("domain", "/dev/shm/mxl", "MXL domain")
+	flowID := flag.String("flow", "5fbec3b1-1b0f-417d-9059-8b94a47197ed", "Flow UUID")
+	timeout := flag.Duration("timeout", 200*time.Millisecond, "Per-grain read timeout")
+	count := flag.Int("count", 10, "Stop after N grains (0 = run forever)")
+	flag.Parse()
+
+	src, err := source.Open(*domain, *flowID)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer src.Close()
+	fmt.Printf("format=%s rate=%d/%d stride=%d grainCount=%d\n",
+		src.Format(),
+		src.Rate().Num,
+		src.Rate().Den,
+		src.Stride(),
+		src.GrainCount())
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
+
+	grains := 0
+	for {
+		select {
+		case <-stop:
+			fmt.Printf("\nstopping: %d grains read\n", grains)
+			return
+		default:
+		}
+
+		f, err := src.Next(*timeout)
+		if err != nil {
+			fmt.Fprintln(os.Stderr, err)
+			return
+		}
+		lines := uint32(0)
+		if src.Stride() > 0 {
+			lines = f.Size / src.Stride()
+		}
+		fmt.Printf("idx=%d size=%d (%dx%d, %d lines) invalid=%v\n",
+			f.Index, f.Size, f.Width, f.Height, lines, f.Invalid)
+		grains++
+		if *count > 0 && grains >= *count {
+			fmt.Printf("done: %d grains read\n", grains)
+			return
+		}
+	}
+}