filter.c File Reference

#include "precomp.h"

Include dependency graph for filter.c:

Go to the source code of this file.

Functions
NTSTATUS NTAPI	FilterProcess (IN PKSFILTER Filter, IN PKSPROCESSPIN_INDEXENTRY ProcessPinsIndex)

Function Documentation

FilterProcess()

NTSTATUS NTAPI FilterProcess	(	IN PKSFILTER	Filter,
		IN PKSPROCESSPIN_INDEXENTRY	ProcessPinsIndex
	)

Definition at line 13 of file filter.c.

{
    ULONG Index;
    PKSPROCESSPIN CurPin, Pin;
    BOOLEAN PendingFrames = FALSE;
 
    if (ProcessPinsIndex->Count)
    {
        /* check if there are outstanding frames */
        for(Index = 1; Index < ProcessPinsIndex->Count; Index++)
        {
            /* get current pin */
            CurPin = ProcessPinsIndex->Pins[Index];
 
            if (CurPin->BytesAvailable && CurPin->Pin->DeviceState == KSSTATE_RUN)
            {
                /* pin has pending frames
                 * to keep all pins synchronized, every pin has to wait untill each chained pin has send its frames downwards
                 */
                PendingFrames = TRUE;
            }
        }
    }
 
    if (!PendingFrames && ProcessPinsIndex->Count)
    {
        /* get first pin */
        Pin = ProcessPinsIndex->Pins[0];
 
        /* check if there is new data available */
        if (Pin->BytesAvailable)
        {
            for(Index = 1; Index < ProcessPinsIndex->Count; Index++)
            {
                /* get current pin */
                CurPin = ProcessPinsIndex->Pins[Index];
 
                /* copy the frame to pin */
                RtlMoveMemory(CurPin->Data, Pin->Data, Pin->BytesAvailable);
                CurPin->BytesUsed = Pin->BytesAvailable;
            }
        }
    }
    /* done */
    return STATUS_SUCCESS;
}