KSPROPERTY_PIN_COMMUNICATION
The KSPROPERTY_PIN_COMMUNICATION property specifies the direction of IRP flow on pins instantiated by the pin factory.
Usage Summary Table
| Get | Set | Target | Property Descriptor Type | Property Value Type |
|---|---|---|---|---|
| Yes | No | Pin | KSP_PIN | KSPIN_COMMUNICATION |
Remarks
The KS filter returns one of the following values, which specifies the communication direction of a pin instantiated by this pin factory.
| Value | Description |
|---|---|
| KSPIN_COMMUNICATION_NONE | The pin factory instantiates IRP sink pins. Such pins can only be connected to IRP source pins. |
| KSPIN_COMMUNICATION_SOURCE | The pin factory instantiates IRP source pins. Such pins can only be connected to IRP sink pins. |
| KSPIN_COMMUNICATION_BOTH | The pin factory instantiates pins that are both IRP sinks and IRP sources. |
| KSPIN_COMMUNICATION_BRIDGE | This pin cannot connect to other pins, but instances can be created on it to receive non-KS I/O requests. |
The source pins send IRPs to sink pins. A source pin may read or write data, and a sink pin may have data read to it or written from it. For more information, see KSPROPERTY_PIN_DATAFLOW.
Stream minidrivers do not need to handle this property directly; the stream class driver handles this property using Stream Request Blocks to query for more information where necessary.
Requirements
Header: ks.h (include Ks.h)