{
  "title": "RTSP Protocol Data Structures",
  "description": "JSON structure documentation for RTSP protocol concepts (RFC 7826)",
  "version": "2.0",
  "entities": {
    "Session": {
      "description": "An RTSP streaming session between client and server",
      "fields": {
        "sessionId": { "type": "string", "description": "Server-assigned session identifier", "required": true },
        "url": { "type": "string", "description": "RTSP stream URL (rtsp://...)", "required": true },
        "state": {
          "type": "string",
          "description": "State machine: Init | Ready | Playing | Recording",
          "required": true
        },
        "transport": { "type": "string", "description": "Transport spec (RTP/AVP;unicast;client_port=...)" },
        "timeout": { "type": "integer", "description": "Session keepalive timeout in seconds" },
        "sdp": { "type": "string", "description": "SDP payload from DESCRIBE response" }
      }
    },
    "Request": {
      "description": "An RTSP request message",
      "fields": {
        "method": {
          "type": "string",
          "description": "RTSP method: OPTIONS | DESCRIBE | SETUP | PLAY | PAUSE | TEARDOWN | RECORD | ANNOUNCE | GET_PARAMETER | SET_PARAMETER",
          "required": true
        },
        "url": { "type": "string", "description": "Request URI (rtsp:// URL or *)", "required": true },
        "cseq": { "type": "integer", "description": "CSeq sequence number for matching responses", "required": true },
        "session": { "type": "string", "description": "Session header value" },
        "transport": { "type": "string", "description": "Transport header for SETUP requests" }
      }
    },
    "Response": {
      "description": "An RTSP response message",
      "fields": {
        "statusCode": {
          "type": "integer",
          "description": "Status code: 200 OK, 404 Not Found, 461 Unsupported Transport, etc.",
          "required": true
        },
        "reasonPhrase": { "type": "string", "description": "Human-readable status description" },
        "cseq": { "type": "integer", "description": "CSeq matching the request", "required": true },
        "session": { "type": "string", "description": "Session ID (for stateful responses)" },
        "contentType": { "type": "string", "description": "Content-Type of response body" },
        "body": { "type": "string", "description": "Response body (SDP for DESCRIBE, etc.)" }
      }
    }
  }
}