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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "encoding/json" | ||
| "errors" | ||
| "fmt" | ||
| "image" | ||
| "image/color" | ||
| "log" | ||
| "net" | ||
| "os" | ||
| "time" | ||
|
|
||
| "github.com/dmisol/animportal/defs" | ||
| "gocv.io/x/gocv" | ||
| ) | ||
|
|
||
| func main() { | ||
| // Listen for incoming connections. | ||
| l, err := net.Listen("tcp", ":50000") | ||
| if err != nil { | ||
| log.Println("istening:", err.Error()) | ||
| os.Exit(1) | ||
| } | ||
| // Close the listener when the application closes. | ||
| defer l.Close() | ||
| for { | ||
| // Listen for an incoming connection. | ||
| conn, err := l.Accept() | ||
| if err != nil { | ||
| log.Println("accepting: ", err.Error()) | ||
| os.Exit(1) | ||
| } | ||
| // Handle connections in a new goroutine. | ||
| go handler(conn) | ||
| } | ||
| } | ||
|
|
||
| func handler(conn net.Conn) { | ||
| defer conn.Close() | ||
|
|
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| buf := make([]byte, 2048) | ||
| // initial json | ||
| if _, err := conn.Read(buf); err != nil { | ||
| log.Println("reading:", err.Error()) | ||
| return | ||
| } | ||
| var init *defs.Init | ||
|
|
||
| if err := json.Unmarshal(buf, init); err != nil { | ||
| log.Println("initial json", err) | ||
| return | ||
| } | ||
|
|
||
| var started chan bool | ||
| go func() { | ||
| // wait for the first "audio" file | ||
| audio := <-started | ||
| if !audio { | ||
| return | ||
| } | ||
|
|
||
| img := gocv.NewMatWithSize(init.W, init.H, gocv.MatTypeCV8UC3) | ||
| fps := 24 | ||
| if init.FPS != 0 { | ||
| fps = init.FPS | ||
| } | ||
| dt := 10000000000 / fps | ||
| t := time.NewTicker(time.Nanosecond * time.Duration(dt)) | ||
| defer t.Stop() | ||
|
|
||
| index := 0 | ||
| for { | ||
| <-t.C | ||
| name := fmt.Sprintf("%s/%d.png", init.Dir, index) | ||
| index++ | ||
|
|
||
| if err := firePng(conn, &img, name); err != nil { | ||
| log.Println("senging png", err) | ||
| return | ||
| } | ||
| } | ||
| }() | ||
|
|
||
| running := false | ||
| for { | ||
| i, err := conn.Read(buf) | ||
| if err != nil { | ||
| log.Println("read", err) | ||
| if !running { | ||
| started <- false | ||
| } | ||
| return | ||
| } | ||
| if err = os.Remove(string(buf[:i])); err != nil { | ||
| log.Println("removing", err) | ||
| if !running { | ||
| started <- false | ||
| } | ||
| return | ||
| } | ||
| if !running { | ||
| log.Println("first audio") | ||
| started <- true | ||
| running = true | ||
| } | ||
| } | ||
| } | ||
|
|
||
| func firePng(c net.Conn, img *gocv.Mat, name string) (err error) { | ||
| gocv.PutText(img, time.Now().String(), image.Point{5, 5}, 0, 5.0, color.RGBA{0, 0, 255, 0}, 2) | ||
| if res := gocv.IMWrite(name, *img); !res { | ||
| err = errors.New("failed to write " + name) | ||
| return | ||
| } | ||
| _, err = c.Write([]byte(name)) | ||
| return | ||
| } |
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