Class VideoSink

java.lang.Object
org.wpilib.vision.camera.VideoSink
All Implemented Interfaces:
AutoCloseable
Direct Known Subclasses:
ImageSink, MjpegServer
public class VideoSink extends Object implements AutoCloseable
A sink for video that accepts a sequence of frames. Each frame may consist of multiple images (e.g. from a stereo or depth camera); these are called channels.

  • Field Details

    • m_handle

      protected int m_handle
      The VideoSink handle.

  • Constructor Details

    • VideoSink

      protected VideoSink(int handle)
      Constructs a VideoSink.
      Parameters:
      handle - The video sink handle.

  • Method Details

    • getKindFromInt

      public static VideoSink.Kind getKindFromInt(int kind)
      Convert from the numerical representation of kind to an enum type.
      Parameters:
      kind - The numerical representation of kind
      Returns:
      The kind

    • close

      public void close()
      Specified by:
      close in interface AutoCloseable

    • isValid

      public boolean isValid()
      Returns true if the VideoSink is valid.
      Returns:
      True if the VideoSink is valid.

    • getHandle

      public int getHandle()
      Returns the video sink handle.
      Returns:
      The video sink handle.

    • equals

      public boolean equals(Object other)
      Overrides:
      equals in class Object

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • getKind

      public VideoSink.Kind getKind()
      Get the kind of the sink.
      Returns:
      The kind of the sink.

    • getName

      public String getName()
      Get the name of the sink. The name is an arbitrary identifier provided when the sink is created, and should be unique.
      Returns:
      The name of the sink.

    • getDescription

      public String getDescription()
      Get the sink description. This is sink-kind specific.
      Returns:
      The sink description.

    • getProperty

      public VideoProperty getProperty(String name)
      Get a property of the sink.
      Parameters:
      name - Property name
      Returns:
      Property (kind Property::kNone if no property with the given name exists)

    • enumerateProperties

      public VideoProperty[] enumerateProperties()
      Enumerate all properties of this sink.
      Returns:
      List of properties.

    • setConfigJson

      public boolean setConfigJson(String config)
      Set properties from a JSON configuration string.

      The format of the JSON input is: 

      {
    "properties": [
        {
            "name": property name
            "value": property value
        }
    ]
}
      Parameters:
      config - configuration
      Returns:
      True if set successfully

    • getConfigJson

      public String getConfigJson()
      Get a JSON configuration string.
      Returns:
      JSON configuration string

    • setSource

      public void setSource(VideoSource source)
      Configure which source should provide frames to this sink. Each sink can accept frames from only a single source, but a single source can provide frames to multiple clients.
      Parameters:
      source - Source

    • getSource

      public VideoSource getSource()
      Get the connected source.
      Returns:
      Connected source; nullptr if no source connected.

    • getSourceProperty

      public VideoProperty getSourceProperty(String name)
      Get a property of the associated source.
      Parameters:
      name - Property name
      Returns:
      Property (kind Property::kNone if no property with the given name exists or no source connected)

    • enumerateSinks

      public static VideoSink[] enumerateSinks()
      Enumerate all existing sinks.
      Returns:
      Vector of sinks.