Initial commit

pkg/streamer/helpers.go

@@ -0,0 +1,57 @@
+package streamer
+
+import (
+	"strings"
+)
+
+const (
+	JSONType       = "type"
+	JSONRemoteAddr = "remote_addr"
+	JSONUserAgent  = "user_agent"
+	JSONReceive    = "receive"
+	JSONSend       = "send"
+)
+
+// Message - struct for data exchange in Web API
+type Message struct {
+	Type  string      `json:"type"`
+	Value interface{} `json:"value,omitempty"`
+}
+
+// other
+
+func Between(s, sub1, sub2 string) string {
+	i := strings.Index(s, sub1)
+	if i < 0 {
+		return ""
+	}
+	s = s[i+len(sub1):]
+
+	if len(sub2) == 1 {
+		i = strings.IndexByte(s, sub2[0])
+	} else {
+		i = strings.Index(s, sub2)
+	}
+	if i >= 0 {
+		return s[:i]
+	}
+
+	return s
+}
+
+func Contains(medias []*Media, media *Media, codec *Codec) bool {
+	var ok1, ok2 bool
+	for _, m := range medias {
+		if m == media {
+			ok1 = true
+			break
+		}
+	}
+	for _, c := range media.Codecs {
+		if c == codec {
+			ok2 = true
+			break
+		}
+	}
+	return ok1 && ok2
+}