1 files changed, 249 insertions, 0 deletions
diff --git a/AVStream/avssamp/capture.cpp b/AVStream/avssamp/capture.cpp
new file mode 100644
index 00000000..019b5ad7
--- /dev/null
+++ b/AVStream/avssamp/capture.cpp
@@ -0,0 +1,249 @@
+/**************************************************************************
+
+    AVStream Filter-Centric Sample
+
+    Copyright (c) 1999 - 2001, Microsoft Corporation
+
+    File:
+
+        capture.cpp
+
+    Abstract:
+
+        This file contains the capture pin implementation for all capture
+        pins on the sample filter.
+
+    History:
+
+        created 5/31/01
+
+**************************************************************************/
+
+#include "avssamp.h"
+
+/**************************************************************************
+
+    PAGED CODE
+
+**************************************************************************/
+
+#ifdef ALLOC_PRAGMA
+#pragma code_seg("PAGE")
+#endif // ALLOC_PRAGMA
+
+
+CCapturePin::
+CCapturePin (
+    IN PKSPIN Pin
+    ) :
+    m_Pin (Pin),
+    m_State (KSSTATE_STOP)
+
+/*++
+
+Routine Description:
+
+    Construct a new capture pin.  Find out the filter associated with this
+    pin and stash a pointer to our parent filter.
+
+Arguments:
+
+    Pin -
+        The AVStream pin object being created.
+
+Return Value:
+
+    None
+
+--*/
+
+{
+
+    PAGED_CODE();
+
+    PKSFILTER ParentFilter = KsPinGetParentFilter (Pin);
+
+    m_ParentFilter = reinterpret_cast <CCaptureFilter *> (
+        ParentFilter -> Context
+        );
+
+}
+
+/*************************************************/
+
+
+NTSTATUS
+CCapturePin::
+SetState (
+    IN KSSTATE ToState,
+    IN KSSTATE FromState
+    )
+
+/*++
+
+Routine Description:
+
+    Called when the pin is transitioning state.  This is a bridge from
+    DispatchSetState in the context of the capture pin.  The function itself
+    performs basic clock handling (things that all the derived pins would use)
+    and then calls the appropriate method in the derived class.
+
+Arguments:
+
+    FromState -
+        The state the pin is transitioning away from
+
+    ToState -
+        The state the pin is transitioning towards
+
+Return Value:
+
+    Success / Failure of state transition.
+
+--*/
+
+{
+
+    PAGED_CODE();
+
+    NTSTATUS Status = STATUS_SUCCESS;
+
+    switch (ToState) {
+        
+        case KSSTATE_STOP:
+
+            //
+            // Reset the dropped frame counter.
+            //
+            m_DroppedFrames = 0;
+            m_FrameNumber = 0;
+
+            //
+            // On a transition to stop, the clock will be released.
+            //
+            if (m_Clock) {
+                m_Clock -> Release ();
+                m_Clock = NULL;
+            }
+
+            Status = Stop (FromState);
+            break;
+
+        case KSSTATE_ACQUIRE:
+
+            //
+            // On a transition to acqiure (from stop), the pin queries for
+            // its assigned clock.  This can be done either here or at the
+            // transition to pause.
+            //
+            if (FromState == KSSTATE_STOP) {
+
+                Status = KsPinGetReferenceClockInterface (
+                    m_Pin,
+                    &m_Clock
+                    );
+
+                if (!NT_SUCCESS (Status)) {
+                    m_Clock = NULL;
+                }
+
+            }
+
+            Status = Acquire (FromState);
+            break;
+
+        case KSSTATE_PAUSE:
+
+            Status = Pause (FromState);
+            break;
+
+        case KSSTATE_RUN:
+
+            Status = Run (FromState);
+            break;
+
+    }
+
+    if (NT_SUCCESS (Status)) {
+        m_State = ToState;
+    }
+
+    return Status;
+
+}
+
+/**************************************************************************
+
+    LOCKED CODE
+
+**************************************************************************/
+
+#ifdef ALLOC_PRAGMA
+#pragma code_seg()
+#endif // ALLOC_PRAGMA
+
+
+ULONG
+CCapturePin::
+QueryFrameDrop (
+    )
+
+/*++
+
+Routine Description:
+
+    Return the number of frames which have been dropped on this pin.
+
+Arguments:
+
+    None
+
+Return Value:
+
+    The number of frames which have been dropped on this pin.
+
+--*/
+
+{
+
+    return m_DroppedFrames;
+
+}
+
+/*************************************************/
+
+
+void
+CCapturePin::
+NotifyDrops (
+    IN ULONG VidDrop,
+    IN ULONG AudDrop
+    )
+
+/*++
+
+Routine Description:
+
+    Stash the number of dropped frames on each pin in this pin to allow
+    this data to be incorporated into any synthesis.
+
+Arguments:
+
+    VidDrop -
+        Number of video frames that have been dropped
+
+    AudDrop -
+        Number of audio frames that have been dropped
+
+Return Value:
+
+    None
+
+--*/
+
+{
+
+    m_NotifyVidDrop = VidDrop;
+    m_NotifyAudDrop = AudDrop;
+
+}