{
    "@apiVersion": "1.1",
    "name": "PersonDistanceTopology",
    "properties": {
      "description": "Analyzing Live Video with Computer Vision for Spatial Analysis",
      "parameters": [
        {
          "name": "rtspUserName",
          "type": "String",
          "description": "rtsp source user name.",
          "default": "dummyUserName"
        },
        {
          "name": "rtspPassword",
          "type": "String",
          "description": "rtsp source password.",
          "default": "dummyPassword"
        },
        {
          "name": "rtspUrl",
          "type": "String",
          "description": "rtsp Url"
        },
        {
          "name": "grpcUrl",
          "type": "String",
          "description": "inferencing Url",
          "default": "tcp://spatialanalysis:50051"
        },
        {
          "name": "spatialanalysisusername",
          "type": "String",
          "description": "spatialanalysis endpoint username",
          "default": "not-in-use"
        },
        {
          "name": "spatialanalysispassword",
          "type": "String",
          "description": "spatialanalysis endpoint password",
          "default": "not-in-use"
        }
      ],
      "sources": [
        {
          "@type": "#Microsoft.VideoAnalyzer.RtspSource",
          "name": "rtspSource",
          "transport": "tcp",
          "endpoint": {
            "@type": "#Microsoft.VideoAnalyzer.UnsecuredEndpoint",
            "url": "${rtspUrl}",
            "credentials": {
              "@type": "#Microsoft.VideoAnalyzer.UsernamePasswordCredentials",
              "username": "${rtspUserName}",
              "password": "${rtspPassword}"
            }
          }
        }
      ],
      "processors": [
        {
          "@type": "#Microsoft.VideoAnalyzer.CognitiveServicesVisionProcessor",
          "name": "computerVisionExtension",
          "endpoint": {
            "@type": "#Microsoft.VideoAnalyzer.UnsecuredEndpoint",
            "url": "${grpcUrl}",
            "credentials": {
              "@type": "#Microsoft.VideoAnalyzer.UsernamePasswordCredentials",
              "username": "${spatialanalysisusername}",
              "password": "${spatialanalysispassword}"
            }
          },
          "inputs": [
            {
              "nodeName": "rtspSource",
              "outputSelectors": [
                {
                  "property": "mediaType",
                  "operator": "is",
                  "value": "video"
                }
              ]
            }
          ],
          "samplingOptions": {         
            "skipSamplesWithoutAnnotation": "false",                
            "maximumSamplesPerSecond": "15.0"                        
          },
          "operation": {
            "@type": "#Microsoft.VideoAnalyzer.SpatialAnalysisPersonDistanceOperation",
            "enableFaceMaskClassifier": "false",
            "trackerNodeConfiguration": "{\"enable_speed\": true}",
            "zones": [
              {
                "zone": {
                  "@type": "#Microsoft.VideoAnalyzer.NamedPolygonString",
                  "polygon": "[[0.0,0.0],[0.0,1.0],[1.0,1.0],[1.0,0.0],[0.0,0.0]]",
                  "name": "entireframe"
                },
                "events": [
                  {
                    "trigger": "event",
                    "outputFrequency": "1",
                    "threshold": "48.00",
                    "focus": "bottomCenter",
                    "minimumDistanceThreshold": "1.5",
                    "maximumDistanceThreshold": "14.5"
                  }
                ]
              }
            ]
          }
        },
        {
          "@type": "#Microsoft.VideoAnalyzer.SignalGateProcessor",
          "name": "signalGateProcessor",
          "inputs": [
            {
              "nodeName": "computerVisionExtension"
            },
            {
              "nodeName": "rtspSource"
            }
          ],
          "activationEvaluationWindow": "PT1S",
          "activationSignalOffset": "PT0S",
          "minimumActivationTime": "PT30S",
          "maximumActivationTime": "PT30S"
        }
      ],
      "sinks": [
        {
          "@type": "#Microsoft.VideoAnalyzer.IotHubMessageSink",
          "name": "hubSink",
          "hubOutputName": "inferenceOutput",
          "inputs": [
            {
              "nodeName": "computerVisionExtension"
            }
          ]
        },
        {
          "@type": "#Microsoft.VideoAnalyzer.VideoSink",
          "name": "videoSink",
          "videoName": "persondistance",
          "inputs": [
            {
              "nodeName": "signalGateProcessor"
            }
          ],
          "videoCreationProperties": {
            "title": "Person Distance",
            "description": "Sample video using SA Person Distance operation",
            "segmentLength": "PT30S"
          },
          "localMediaCachePath": "/var/lib/videoanalyzer/tmp/",
          "localMediaCacheMaximumSizeMiB": "2048"
        }
      ]
    }
  }