Move stats code into its own module.

Move RTP-specific code into its own file.

rtpstats.go

@@ -0,0 +1,74 @@
+package main
+
+import (
+	"sort"
+	"sync/atomic"
+	"time"
+
+	"sfu/rtptime"
+	"sfu/stats"
+)
+
+func (c *webClient) GetStats() *stats.Client {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	cs := stats.Client{
+		Id: c.id,
+	}
+
+	for _, up := range c.up {
+		conns := stats.Conn{
+			Id: up.id,
+		}
+		tracks := up.getTracks()
+		for _, t := range tracks {
+			expected, lost, _, _ := t.cache.GetStats(false)
+			if expected == 0 {
+				expected = 1
+			}
+			loss := uint8(lost * 100 / expected)
+			jitter := time.Duration(t.jitter.Jitter()) *
+				(time.Second / time.Duration(t.jitter.HZ()))
+			rate, _ := t.rate.Estimate()
+			conns.Tracks = append(conns.Tracks, stats.Track{
+				Bitrate: uint64(rate) * 8,
+				Loss:    loss,
+				Jitter:  jitter,
+			})
+		}
+		cs.Up = append(cs.Up, conns)
+	}
+	sort.Slice(cs.Up, func(i, j int) bool {
+		return cs.Up[i].Id < cs.Up[j].Id
+	})
+
+	jiffies := rtptime.Jiffies()
+	for _, down := range c.down {
+		conns := stats.Conn{
+			Id:         down.id,
+			MaxBitrate: down.GetMaxBitrate(jiffies),
+		}
+		for _, t := range down.tracks {
+			rate, _ := t.rate.Estimate()
+			rtt := rtptime.ToDuration(atomic.LoadUint64(&t.rtt),
+				rtptime.JiffiesPerSec)
+			loss, jitter := t.stats.Get(jiffies)
+			j := time.Duration(jitter) * time.Second /
+				time.Duration(t.track.Codec().ClockRate)
+			conns.Tracks = append(conns.Tracks, stats.Track{
+				Bitrate:    uint64(rate) * 8,
+				MaxBitrate: t.maxBitrate.Get(jiffies),
+				Loss:       uint8(uint32(loss) * 100 / 256),
+				Rtt:        rtt,
+				Jitter:     j,
+			})
+		}
+		cs.Down = append(cs.Down, conns)
+	}
+	sort.Slice(cs.Down, func(i, j int) bool {
+		return cs.Down[i].Id < cs.Down[j].Id
+	})
+
+	return &cs
+}

stats.go

@@ -1,131 +0,0 @@
-package main
-
-import (
-	"sort"
-	"sync/atomic"
-	"time"
-
-	"sfu/group"
-	"sfu/rtptime"
-)
-
-type groupStats struct {
-	name    string
-	clients []clientStats
-}
-
-type clientStats struct {
-	id       string
-	up, down []connStats
-}
-
-type connStats struct {
-	id         string
-	maxBitrate uint64
-	tracks     []trackStats
-}
-
-type trackStats struct {
-	bitrate    uint64
-	maxBitrate uint64
-	loss       uint8
-	rtt        time.Duration
-	jitter     time.Duration
-}
-
-func getGroupStats() []groupStats {
-	names := group.GetNames()
-
-	gs := make([]groupStats, 0, len(names))
-	for _, name := range names {
-		g := group.Get(name)
-		if g == nil {
-			continue
-		}
-		clients := g.GetClients(nil)
-		stats := groupStats{
-			name:    name,
-			clients: make([]clientStats, 0, len(clients)),
-		}
-		for _, c := range clients {
-			c, ok := c.(*webClient)
-			if ok {
-				cs := getClientStats(c)
-				stats.clients = append(stats.clients, cs)
-			}
-		}
-		sort.Slice(stats.clients, func(i, j int) bool {
-			return stats.clients[i].id < stats.clients[j].id
-		})
-		gs = append(gs, stats)
-	}
-	sort.Slice(gs, func(i, j int) bool {
-		return gs[i].name < gs[j].name
-	})
-
-	return gs
-}
-
-func getClientStats(c *webClient) clientStats {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-
-	cs := clientStats{
-		id: c.id,
-	}
-
-	for _, up := range c.up {
-		conns := connStats{
-			id: up.id,
-		}
-		tracks := up.getTracks()
-		for _, t := range tracks {
-			expected, lost, _, _ := t.cache.GetStats(false)
-			if expected == 0 {
-				expected = 1
-			}
-			loss := uint8(lost * 100 / expected)
-			jitter := time.Duration(t.jitter.Jitter()) *
-				(time.Second / time.Duration(t.jitter.HZ()))
-			rate, _ := t.rate.Estimate()
-			conns.tracks = append(conns.tracks, trackStats{
-				bitrate: uint64(rate) * 8,
-				loss:    loss,
-				jitter:  jitter,
-			})
-		}
-		cs.up = append(cs.up, conns)
-	}
-	sort.Slice(cs.up, func(i, j int) bool {
-		return cs.up[i].id < cs.up[j].id
-	})
-
-	jiffies := rtptime.Jiffies()
-	for _, down := range c.down {
-		conns := connStats{
-			id:         down.id,
-			maxBitrate: down.GetMaxBitrate(jiffies),
-		}
-		for _, t := range down.tracks {
-			rate, _ := t.rate.Estimate()
-			rtt := rtptime.ToDuration(atomic.LoadUint64(&t.rtt),
-				rtptime.JiffiesPerSec)
-			loss, jitter := t.stats.Get(jiffies)
-			j := time.Duration(jitter) * time.Second /
-				time.Duration(t.track.Codec().ClockRate)
-			conns.tracks = append(conns.tracks, trackStats{
-				bitrate:    uint64(rate) * 8,
-				maxBitrate: t.maxBitrate.Get(jiffies),
-				loss:       uint8(uint32(loss) * 100 / 256),
-				rtt:        rtt,
-				jitter:     j,
-			})
-		}
-		cs.down = append(cs.down, conns)
-	}
-	sort.Slice(cs.down, func(i, j int) bool {
-		return cs.down[i].id < cs.down[j].id
-	})
-
-	return cs
-}

stats/stats.go

@@ -0,0 +1,73 @@
+package stats
+
+import (
+	"sort"
+	"time"
+
+	"sfu/group"
+)
+
+type GroupStats struct {
+	Name    string
+	Clients []*Client
+}
+
+type Client struct {
+	Id       string
+	Up, Down []Conn
+}
+
+type Statable interface {
+	GetStats() *Client
+}
+
+type Conn struct {
+	Id         string
+	MaxBitrate uint64
+	Tracks     []Track
+}
+
+type Track struct {
+	Bitrate    uint64
+	MaxBitrate uint64
+	Loss       uint8
+	Rtt        time.Duration
+	Jitter     time.Duration
+}
+
+func GetGroups() []GroupStats {
+	names := group.GetNames()
+
+	gs := make([]GroupStats, 0, len(names))
+	for _, name := range names {
+		g := group.Get(name)
+		if g == nil {
+			continue
+		}
+		clients := g.GetClients(nil)
+		stats := GroupStats{
+			Name:    name,
+			Clients: make([]*Client, 0, len(clients)),
+		}
+		for _, c := range clients {
+			s, ok := c.(Statable)
+			if ok {
+				cs := s.GetStats()
+				stats.Clients = append(stats.Clients, cs)
+			} else {
+				stats.Clients = append(stats.Clients,
+					&Client{Id: c.Id()},
+				)
+			}
+		}
+		sort.Slice(stats.Clients, func(i, j int) bool {
+			return stats.Clients[i].Id < stats.Clients[j].Id
+		})
+		gs = append(gs, stats)
+	}
+	sort.Slice(gs, func(i, j int) bool {
+		return gs[i].Name < gs[j].Name
+	})
+
+	return gs
+}

webserver.go

@@ -21,6 +21,7 @@ import (
 
 	"sfu/disk"
 	"sfu/group"
+	"sfu/stats"
 )
 
 var server *http.Server
@@ -50,7 +51,7 @@ func webserver() {
 		IdleTimeout:       120 * time.Second,
 	}
 	server.RegisterOnShutdown(func() {
-		group.Range(func (g *group.Group) bool {
+		group.Range(func(g *group.Group) bool {
 			go g.Shutdown("server is shutting down")
 			return true
 		})
@@ -225,7 +226,7 @@ func statsHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	stats := getGroupStats()
+	ss := stats.GetGroups()
 
 	fmt.Fprintf(w, "<!DOCTYPE html>\n<html><head>\n")
 	fmt.Fprintf(w, "<title>Stats</title>\n")
@@ -242,51 +243,51 @@ func statsHandler(w http.ResponseWriter, r *http.Request) {
 		return err
 	}
 
-	printTrack := func(w io.Writer, t trackStats) {
+	printTrack := func(w io.Writer, t stats.Track) {
 		fmt.Fprintf(w, "<tr><td></td><td></td><td></td>")
 		fmt.Fprintf(w, "<td>")
-		printBitrate(w, t.bitrate, t.maxBitrate)
+		printBitrate(w, t.Bitrate, t.MaxBitrate)
 		fmt.Fprintf(w, "</td>")
 		fmt.Fprintf(w, "<td>%d%%</td>",
-			t.loss,
+			t.Loss,
 		)
 		fmt.Fprintf(w, "<td>")
-		if t.rtt > 0 {
-			fmt.Fprintf(w, "%v", t.rtt)
+		if t.Rtt > 0 {
+			fmt.Fprintf(w, "%v", t.Rtt)
 		}
-		if t.jitter > 0 {
-			fmt.Fprintf(w, "&#177;%v", t.jitter)
+		if t.Jitter > 0 {
+			fmt.Fprintf(w, "&#177;%v", t.Jitter)
 		}
 		fmt.Fprintf(w, "</td>")
 		fmt.Fprintf(w, "</tr>")
 	}
 
-	for _, gs := range stats {
-		fmt.Fprintf(w, "<p>%v</p>\n", html.EscapeString(gs.name))
+	for _, gs := range ss {
+		fmt.Fprintf(w, "<p>%v</p>\n", html.EscapeString(gs.Name))
 		fmt.Fprintf(w, "<table>")
-		for _, cs := range gs.clients {
-			fmt.Fprintf(w, "<tr><td>%v</td></tr>\n", cs.id)
-			for _, up := range cs.up {
+		for _, cs := range gs.Clients {
+			fmt.Fprintf(w, "<tr><td>%v</td></tr>\n", cs.Id)
+			for _, up := range cs.Up {
 				fmt.Fprintf(w, "<tr><td></td><td>Up</td><td>%v</td>",
-					up.id)
-				if up.maxBitrate > 0 {
+					up.Id)
+				if up.MaxBitrate > 0 {
 					fmt.Fprintf(w, "<td>%v</td>",
-						up.maxBitrate)
+						up.MaxBitrate)
 				}
 				fmt.Fprintf(w, "</tr>\n")
-				for _, t := range up.tracks {
+				for _, t := range up.Tracks {
 					printTrack(w, t)
 				}
 			}
-			for _, down := range cs.down {
+			for _, down := range cs.Down {
 				fmt.Fprintf(w, "<tr><td></td><td>Down</td><td> %v</td>",
-					down.id)
-				if down.maxBitrate > 0 {
+					down.Id)
+				if down.MaxBitrate > 0 {
 					fmt.Fprintf(w, "<td>%v</td>",
-						down.maxBitrate)
+						down.MaxBitrate)
 				}
 				fmt.Fprintf(w, "</tr>\n")
-				for _, t := range down.tracks {
+				for _, t := range down.Tracks {
 					printTrack(w, t)
 				}
 			}