The Ancillary Data Classes allow client software to easily encode/decode SDI Ancillary Data or HDMI Auxiliary Data to/from host buffers in a manner that’s compatible with how NTV2 devices transmit/receive ancillary data. See SDI Ancillary Data or HDMI Auxiliary Data for more information.

In SDK 14.x and earlier, these classes were in their own libajaanc library, but starting with SDK 15.0, they were merged into the “libajantv2” Class Library to support the (new at the time) KONA IP and Io IP devices.

Demonstration Applications

Transmit/Playout:: See SDI Anc Packet Capture (or Custom Aux Packet Capture for HDMI).

Receive/Capture:: See SDI Anc Packet Playout (or HDMI Auxiliary Data Playout for HMDMI).

Principal Classes:

AJAAncillaryData: Container that holds a single SDI Anc or HDMI Aux packet (or SDI raster line containing “analog” waveform data).
- AJAAncillaryData_Cea608: A CEA-608 data packet.
  - AJAAncillaryData_Cea608_Line21: An “analog” CEA-608 data packet (decoded from or encoded to line 21).
  - AJAAncillaryData_Cea608_Vanc: A CEA-608 data packet sourced from or destined to a “tall” (or “taller”) frame buffer that contains VANC lines.
- AJAAncillaryData_Cea708: Container that holds a single CEA-708 SMPTE 334 packet.
- AJAAncillaryData_Timecode: Container that holds a single timecode packet.
  - AJAAncillaryData_Timecode_ATC: An “analog” (ATC) timecode packet.
  - AJAAncillaryData_Timecode_VITC: A VITC timecode packet.
- AJAAncillaryData_FrameStatusInfo524D: A “524D” frame status info packet.
- AJAAncillaryData_FrameStatusInfo5251: A “5251” frame status info packet.
- AJAAncillaryData_HDMI_Aux: An HDMI Aux data packet.
AJAAncillaryDataFactory: Provides AJAAncillaryDataFactory::Create and AJAAncillaryDataFactory::GuessAncillaryDataType class methods.
AJAAncillaryList: An ordered collection of AJAAncillaryData packets.

Note: Avoid deriving subclasses from AJA-provided classes. AJA recommends using aggregation techniques to incorporate NTV2 functionality into your own classes.