Basic Acquisition

The way to set a basic acquisition receive application is as follows:

• A receive channel must be obtained using the mxfModuleChannelGet() function or with the mxfModuleChannelAllGet() function by specifying the MXF_SCLASS_RXACQ_SRV subclass.
• The acquisition buffer must be allocated using the mxfRxAcqBufferAlloc() function.
• The acquisition mode can be set using mxfRxAcqModeSet() function.
  
  Two modes of acquisition are defined:
  
  

  Condition	Description
  MXF_RXACQ_MODE_LINEAR	In this mode the acquisition stops when the buffer is full.
  MXF_RXACQ_MODE_CIRCULAR	In this mode the acquisition buffer is circular and never stops receiving. Whenever the acquisition queue becomes full, the acquisition process will discard newest received record.

• The acquisition must be started using the mxfRxAcqStart() function.
• A read loop can be implemented using the mxfASYNCEHRxAcqRead() function. The mxfASYNCEHNextDataRecordPtrGet() function needs to be used to navigate in the receive buffer.

The MXF_ASYNCEH_DATAREC structure must be used for reading ASYNC messages with acquisition service.

Example

The example below shows how to implement an ASYNC basic receive acquisition application.

async.c