streaming

audio/audio.go

@@ -8,15 +8,9 @@ import (
 	"../icecast"
 )
 
-// type stream_t struct {
+type Next func() (string, error)
-// 	filepath		string
-// 	bitrate			int
-// 	channels		int
-// 	encoding_src 	string
-// 	encoding_dst 	string
-// }
 
-func Play(filename string)  {
+func Start(next_cb Next)  {
 
 	sig := make(chan os.Signal, 1)
 	signal.Notify(sig, os.Interrupt, os.Kill)	
@@ -26,41 +20,51 @@ func Play(filename string)  {
 	channels := 1
 	bytes_per_sec := int(samplerate) * channels * bytes_per_sample
 
-	r, e := os.Open(filename)
-	chk(e)
-	defer r.Close()
-
 	_, er := icecast.Connect()
 	chk(er)
 
 	audio := make([]byte, 2 * 1024)
-
 	dt := time.Second * time.Duration(len(audio)) / time.Duration(bytes_per_sec)
 
-	now := time.Now()
+	for fname, exit := next_cb(); exit == nil; fname, exit = next_cb() {
 
-	for {
+		r, e := os.Open(fname)
+		chk(e)
+		defer r.Close()
+
+		now := time.Now()
+
+		for {
+
+			n, err := r.Read(audio)
+			if n == 0 {
+				break
+			}
+			chk(err)
+
+			pre := time.Now()
+
+			icecast.Send(audio)
+
+			post := time.Now()
+			lag := time.Duration((post.Sub(pre)))
+
+			select {
+				case <-sig:
+					return
+				default:
+			}
+
+			dt = (time.Second * time.Duration(n) / time.Duration(bytes_per_sec)) - lag
+			
+			time.Sleep(dt)		
 
-		n, err := r.Read(audio)
-		if n == 0 {
-			break
 		}
-		chk(err)
 
-		icecast.Send(audio)
+		fmt.Println(time.Duration(time.Now().Sub(now)))
-
-		select {
-		case <-sig:
-			return
-		default:
-		}
-		
-		time.Sleep(dt)		
 
 	}
 
-	fmt.Println(time.Duration(time.Now().Sub(now)))
-
 }
 
 

playlist/playlist.go

@@ -13,12 +13,15 @@ import (
 
 var pln = log.Println
 
+type Pop func(*Playlist)
+
 type Playlist struct {
 	NAME 		string
 	CTRACK		config.Track_t	
 	CALBUM		config.Album_t
 	LIST		[]uint32
 	MAX			int
+	CALLB 			Pop
 }
 
 type PrettyPlaylist struct {
@@ -29,6 +32,19 @@ type PrettyPlaylist struct {
 	MAX			int
 }
 
+type MinimalTrack struct {
+	ID 		string	`json:"id"`
+	NAME	string	`json:"name"`
+	MAKER	string	`json:"maker"`
+	ALBUM	string	`json:"album"`
+}
+
+type MinimalPlaylist struct {
+	NAME 		string	`json:"name"`
+	CTRACK		string	`json:"ctrack"`
+	CALBUM		string	`json:"calbum"`
+	LIST		[]MinimalTrack	`json:"list"`
+}
 
 func MakeRandom(name string, max int) (*Playlist, error) {
 	err := archive.Build()
@@ -80,19 +96,22 @@ func (pp *PrettyPlaylist) Unpretty() *Playlist {
 	p := &Playlist{NAME: pp.NAME, CTRACK: pp.CTRACK, CALBUM: pp.CALBUM, MAX: pp.MAX}
 	p.LIST = make([]uint32, len(pp.LIST))
 	for i := 0; i < len(pp.LIST); i++ {
-		p.LIST = append(p.LIST, pp.LIST[i].ID)
+		p.LIST[i] = pp.LIST[i].ID
 	}
 	return p	
 }
 
-// type PrettyPlaylist struct {
+func (p *Playlist) Minimal() *MinimalPlaylist {
-// 	NAME 		string
+	mp := &MinimalPlaylist{NAME: p.NAME, CTRACK: p.CTRACK.NAME}
-// 	CTRACK		config.Track_t	
+	mp.CALBUM = p.CALBUM.MAKER + " - " + p.CALBUM.NAME
-// 	CALBUM		config.Album_t
+	mp.LIST = make([]MinimalTrack, len(p.LIST))
-// 	LIST		[]config.Track_t
+	for i := 0; i < len(p.LIST); i++ {
-// 	MAX			int
+		track := archive.Archive_map[p.LIST[i]]
-// }
+		strid := strconv.FormatUint(uint64(track.ID), 10)
-
+		mp.LIST[i] = MinimalTrack{ID: strid, NAME: track.NAME, MAKER: track.MAKER, ALBUM: track.ALBUM}
+	}
+	return mp	
+}
 
 func (pp *PrettyPlaylist) Print() {
 
@@ -115,9 +134,9 @@ func print(slice []uint32) {
 // https://github.com/golang/go/wiki/SliceTricks
 // https://stackoverflow.com/questions/33834742/remove-and-adding-elements-to-array-in-go-lang
 
-func (p *Playlist) Pop() error {
+func (p *Playlist) Pop() (string, error) {
 	if len(p.LIST) == 0 {
-		return errors.New("Playlist is empty")
+		return "", errors.New("Playlist is empty")
 	} 
 
 	t := p.LIST[0]
@@ -130,7 +149,11 @@ func (p *Playlist) Pop() error {
 	p.CTRACK = archive.Archive_map[t]
 	p.CALBUM = config.Xcfg.Archive.ALBUMS[p.CTRACK.AID]
 
-	return nil
+	if p.CALLB != nil {
+		p.CALLB(p)
+	}
+
+	return p.CTRACK.PATH, nil
 }
 
 func (p *Playlist) Push(track_id uint32) error {
@@ -191,26 +214,43 @@ func (p *Playlist) Move(track_id uint32, at_index int) error {
 		return errors.New("Invalid track ID")
 	}
 
-	slice_head := p.LIST[:k]
+	// pln("k: " + strconv.Itoa(k))
-	slice_move := p.LIST[k+1:at_index+1]
+	// pln("at_index: " + strconv.Itoa(at_index))
-	slice_tail := make([]uint32, len(p.LIST[at_index+1:]))
+	// pln("------")
-	copy(slice_tail, p.LIST[at_index+1:])
 
-	// slice_move = append(slice_move, track_id)
+	var slice_head, slice_move, slice_tail []uint32
+	if k < at_index {
+		slice_head = make([]uint32, len(p.LIST[:k]))
+		copy(slice_head, p.LIST[:k])
+		// slice_head = p.LIST[:k]
+		slice_move = make([]uint32, len(p.LIST[k+1:at_index+1]))
+		copy(slice_move, p.LIST[k+1:at_index+1])
+		// slice_move = p.LIST[k:at_index]
+		slice_tail = make([]uint32, len(p.LIST[at_index+1:]))
+		copy(slice_tail, p.LIST[at_index+1:])		
+		p.LIST = append(slice_head, append(append(slice_move, track_id), slice_tail...)...)
+	} else if k > at_index {
+		slice_head = make([]uint32, len(p.LIST[:at_index]))
+		copy(slice_head, p.LIST[:at_index])
+		// slice_head = p.LIST[:at_index]
+		slice_move = make([]uint32, len(p.LIST[at_index:k]))
+		copy(slice_move, p.LIST[at_index:k])		
+		// slice_tail = p.LIST[k+1:]
+		slice_tail = make([]uint32, len(p.LIST[k+1:]))
+		copy(slice_tail, p.LIST[k+1:])
+		p.LIST = append(append(append(slice_head, track_id), slice_move...), slice_tail...)
+	}
 
-	pln("from_index: " + strconv.Itoa(k))
-	pln("at_index: " + strconv.Itoa(at_index))
-	pln("------")
-	pln("slice head: ")
-	print(slice_head)
-	pln("slice move: ")
-	print(slice_move)
-	pln("** ")
-	pln("slice tail: ")
-	print(slice_tail)
-	pln("...........................")
 
-	p.LIST = append(slice_head, append(append(slice_move, track_id), slice_tail...)...)
+	// pln("slice head: ")
+	// print(slice_head)
+	// pln("slice move: ")
+	// print(slice_move)
+	// pln("** ")
+	// pln("slice tail: ")
+	// print(slice_tail)
+	// pln("...........................")
+
 
 	return nil
 }

serve.go

@@ -5,19 +5,25 @@ import (
 	"log"
 	"net/http"
 	"./config"
+	"./audio"
 	"./playlist"
 	"./www"
 )
 
 var pln = fmt.Println
+var p 	*playlist.Playlist = nil
 
 func main() {
 	config.Loadconfig("config.ini")
+
 	p, err := playlist.MakeRandom("YOYO", 10)
 	if err != nil {
 		panic(err)
 	}
-	p.Pop()
+
-	www.Init(p)
+	www.Init(p)	
+
+    go audio.Start(p.Pop)
+
     log.Fatal(http.ListenAndServe(":8718", nil))
-}
+}

www/tmpl/playlist.html

@@ -19,13 +19,10 @@
     				console.log("update")	    				
     				list = Array.from(document.querySelectorAll('#sortable>li'));
     				var i = list.indexOf(u.item[0])
-    				console.log(u.item.attr("id") + " is now " + i)
     				on_update_operation(u.item.attr("id"), i)
     			}
     		});
     		$( "#sortable" ).disableSelection();
-
-    		// connect to ppop
     		sock = new WebSocket("ws://localhost:8718/ppop");
     		sock.onopen = function() {
     			console.log("ppop open")
@@ -34,31 +31,63 @@
     			console.log("ppop closed")
     			sock = new WebSocket("ws://localhost:8718/ppop");
     		}
-
     		sock.onmessage = function(msg) {
-    			console.log(msg.data)
+          check_fix_list(JSON.parse(msg.data))
     		}
-
-    		// setInterval(function() {
-    		// 	sock.send(JSON.stringify({"op": "tick", "id": "0", "index": 0}));
-    		// },3000);
-
   		} );
   		var sock = null;
   		function on_update_operation(id, index) {
   			if(sock) {
   				console.log("sending")
-  				sock.send(JSON.stringify({"op": "move", "id": id, "index": index}));	
+  				sock.send(JSON.stringify({"op": "move", "id": id, "index": index}))
   			}  			
   		}
+      function check_fix_list(playlist) {
+
+        console.log(playlist)
+
+        $("#pname").text("Playlist: " + playlist.name)
+        $("#tname").text("Current Track: " + playlist.ctrack)
+        $("#aname").text("Current Album: " + playlist.calbum)
+
+
+        list = Array.from(document.querySelectorAll('#sortable>li'))
+
+
+        console.log("length ul: " + list.length)
+        console.log("length playlist: " + playlist.list.length)
+
+
+        for (let i = 0; i < list.length; i++) {
+          if(i >= playlist.list.length) {
+            break
+          } else if (list[i].id != playlist.list[i]["id"]) {
+            console.log("difference at index: " + i)
+            list[i].setAttribute("id", playlist.list[i]["id"])
+            list[i].innerHTML = "<span>" + playlist.list[i]["maker"] + 
+                                  " - " + playlist.list[i]["album"] + 
+                                  " - " + playlist.list[i]["name"] + "</span>" ;
+          }
+        }
+
+        var ul = document.getElementById('sortable');
+        if(list.length > playlist.list.length) {
+          for(let i = playlist.list.length; i < list.length; i++) {
+            ul.removeChild(list[i])
+          }
+        } else if (list.length < playlist.list.length) {
+
+        }
+        console.log("synched!!")
+      }
 	</script>	
 	<title>Radiodiodio</title>
 </head>
 <body>
-<h1>Playlist: {{.NAME}}</h1>
+<h1 id="pname">Playlist: {{.NAME}}</h1>
-
+<audio controls src="http://192.168.1.80:8088/wwww"></audio>
-<h2>Current Track: {{.CTRACK.NAME}} </h2>
+<h2 id="tname">Current Track: {{.CTRACK.NAME}}</h2>
-<h2>Current Album : {{.CALBUM.NAME}} - {{.CALBUM.MAKER}}</h2>
+<h2 id="aname">Current Album : {{.CALBUM.NAME}} - {{.CALBUM.MAKER}}</h2>
 
 <ul id="sortable">
 	{{range $.LIST}}

www/www.go

@@ -10,9 +10,11 @@ import (
 )
 
 // todo: hub - https://stackoverflow.com/questions/31532652/go-websocket-send-all-clients-a-message
+var wsc *websocket.Conn
 
-var pp 	*playlist.PrettyPlaylist
 var p 	*playlist.Playlist
+var pp 	*playlist.PrettyPlaylist
+var mp 	*playlist.MinimalPlaylist 
 
 var pln = log.Println
 
@@ -29,7 +31,9 @@ var upgrader = websocket.Upgrader{
 
 func Init(playlist *playlist.Playlist) {
 	p = playlist
+	p.CALLB = pop_callback
 	pp = p.Pretty() 
+	mp = p.Minimal()
 	http.HandleFunc("/pp", pp_handler)
 	http.HandleFunc("/ppop", pp_operations)
 }
@@ -51,10 +55,11 @@ func pp_operations(w http.ResponseWriter, r *http.Request) {
 		pln(err)
 		return
 	}
+	wsc = c 			// this should be hub
 	go readop(c)
 }
 
-func readop(c *websocket.Conn) {
+func readop(c *websocket.Conn) {	
 	for {
 		opdata := &op_t{}
 		if err := c.ReadJSON(&opdata); err != nil {
@@ -66,27 +71,24 @@ func readop(c *websocket.Conn) {
 			if id, err := strconv.ParseUint(opdata.ID, 10, 32); err == nil {
 				p.Move(uint32(id), opdata.INDEX)
 				pp = p.Pretty()
-				pp.Print()		
+				mp = p.Minimal()
+				// pp.Print()		
 			}			
 		}
 
-		pln(opdata.OP)
+		if err := c.WriteJSON(mp); err != nil {
-		pln(opdata.ID)
-		pln(opdata.INDEX)
-		if err := c.WriteJSON(opdata); err != nil {
 			pln(err)
 			return			//connection lost?
 		}		
 	}
 }
 
-// func pp_operations(ws *websocket.Conn) {
+func pop_callback(list *playlist.Playlist) {
-// 	opdata := &op_t{}
+	if list == p {
-// 	if err := websocket.JSON.Receive(ws, &opdata); err != nil {
+		pp = p.Pretty()
-// 		pln(err)
+		mp = p.Minimal()
-// 	}
+		if wsc != nil {
-// 	// websocket.JSON.Send(ws, "ok")
+			wsc.WriteJSON(mp)	// this should be hub broadcasted
-// 	pln(opdata.OP)
+		}		
-// 	pln(opdata.ID)
+	}
-// 	pln(opdata.INDEX)
+}
-// }