直播：后台 JWT 推流、前台画中画；WebRTC 服务与 Nginx WebSocket 代理

Made-with: Cursor

server/vendor/github.com/pion/webrtc/v3/datachannelstate.go

@@ -0,0 +1,75 @@
+// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
+// SPDX-License-Identifier: MIT
+
+package webrtc
+
+// DataChannelState indicates the state of a data channel.
+type DataChannelState int
+
+const (
+	// DataChannelStateConnecting indicates that the data channel is being
+	// established. This is the initial state of DataChannel, whether created
+	// with CreateDataChannel, or dispatched as a part of an DataChannelEvent.
+	DataChannelStateConnecting DataChannelState = iota + 1
+
+	// DataChannelStateOpen indicates that the underlying data transport is
+	// established and communication is possible.
+	DataChannelStateOpen
+
+	// DataChannelStateClosing indicates that the procedure to close down the
+	// underlying data transport has started.
+	DataChannelStateClosing
+
+	// DataChannelStateClosed indicates that the underlying data transport
+	// has been closed or could not be established.
+	DataChannelStateClosed
+)
+
+// This is done this way because of a linter.
+const (
+	dataChannelStateConnectingStr = "connecting"
+	dataChannelStateOpenStr       = "open"
+	dataChannelStateClosingStr    = "closing"
+	dataChannelStateClosedStr     = "closed"
+)
+
+func newDataChannelState(raw string) DataChannelState {
+	switch raw {
+	case dataChannelStateConnectingStr:
+		return DataChannelStateConnecting
+	case dataChannelStateOpenStr:
+		return DataChannelStateOpen
+	case dataChannelStateClosingStr:
+		return DataChannelStateClosing
+	case dataChannelStateClosedStr:
+		return DataChannelStateClosed
+	default:
+		return DataChannelState(Unknown)
+	}
+}
+
+func (t DataChannelState) String() string {
+	switch t {
+	case DataChannelStateConnecting:
+		return dataChannelStateConnectingStr
+	case DataChannelStateOpen:
+		return dataChannelStateOpenStr
+	case DataChannelStateClosing:
+		return dataChannelStateClosingStr
+	case DataChannelStateClosed:
+		return dataChannelStateClosedStr
+	default:
+		return ErrUnknownType.Error()
+	}
+}
+
+// MarshalText implements encoding.TextMarshaler
+func (t DataChannelState) MarshalText() ([]byte, error) {
+	return []byte(t.String()), nil
+}
+
+// UnmarshalText implements encoding.TextUnmarshaler
+func (t *DataChannelState) UnmarshalText(b []byte) error {
+	*t = newDataChannelState(string(b))
+	return nil
+}