IKsPin::KsDecrementPendingIoCount method (ksproxy.h)
The KsDecrementPendingIoCount method decrements the number of input/output (I/O) operations that are in progress on a pin.
Syntax
LONG KsDecrementPendingIoCount();
Return value
Returns an integer from 0 to n, the value that represents the new number of I/O operations that are in progress.
Remarks
The KsDecrementPendingIoCount method is typically called from within an interface handler as described in the following sequence:
- The proxy creates an instance of an interface handler (IKsInterfaceHandler) to handle a particular media type.
- A client calls the IKsInterfaceHandler::KsSetPin method to inform that interface handler about the pin with which to communicate when passing data.
- The client calls the IKsInterfaceHandler::KsProcessMediaSamples method to move samples from or to the assigned pin. KsProcessMediaSamples performs I/O operations and for each I/O operation, calls IKsPin::KsIncrementPendingIoCount to increment the I/O count.
- The client calls the IKsInterfaceHandler::KsCompleteIo method to complete an I/O operation. KsCompleteIo calls KsDecrementPendingIoCount to decrement the I/O count.
Requirements
| Requirement | Value |
|---|---|
| Target Platform | Desktop |
| Header | ksproxy.h (include Ksproxy.h) |
See also
IKsInterfaceHandler::KsCompleteIo