added some changes to mediamtx and audiostreams

server/internal/handlers/broker.go

@@ -0,0 +1,48 @@
+package handlers
+
+import (
+	"sync"
+)
+
+type Broker struct {
+	mu   sync.Mutex
+	subs map[string]map[chan struct{}]struct{} // key = path, val = set of channels
+}
+
+func NewBroker() *Broker {
+	return &Broker{subs: make(map[string]map[chan struct{}]struct{})}
+}
+
+func (b *Broker) Subscribe(path string) chan struct{} {
+	ch := make(chan struct{}, 1)
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	if b.subs[path] == nil {
+		b.subs[path] = make(map[chan struct{}]struct{})
+	}
+	b.subs[path][ch] = struct{}{}
+	return ch
+}
+
+func (b *Broker) Unsubscribe(path string, ch chan struct{}) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	if set, ok := b.subs[path]; ok {
+		delete(set, ch)
+		if len(set) == 0 {
+			delete(b.subs, path)
+		}
+	}
+	close(ch)
+}
+
+func (b *Broker) Publish(path string) {
+	b.mu.Lock()
+	defer b.mu.Unlock()
+	for ch := range b.subs[path] {
+		select {
+		case ch <- struct{}{}:
+		default:
+		}
+	}
+}