1 files changed, 83 insertions, 0 deletions
diff --git a/third_party/BaseClasses/seekpt.cpp b/third_party/BaseClasses/seekpt.cpp
new file mode 100644
index 00000000..bb13d6f0
--- /dev/null
+++ b/third_party/BaseClasses/seekpt.cpp
@@ -0,0 +1,83 @@
+//------------------------------------------------------------------------------
+// File: SeekPT.cpp
+//
+// Desc: DirectShow base classes.
+//
+// Copyright (c) 1992-2001 Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------------------------
+
+
+#include <streams.h>
+#include "seekpt.h"
+
+//==================================================================
+// CreateInstance
+// This goes in the factory template table to create new instances
+// If there is already a mapper instance - return that, else make one
+// and save it in a static variable so that forever after we can return that.
+//==================================================================
+
+CUnknown * CSeekingPassThru::CreateInstance(__inout_opt LPUNKNOWN pUnk, __inout HRESULT *phr)
+{
+    return new CSeekingPassThru(NAME("Seeking PassThru"),pUnk, phr);
+}
+
+
+STDMETHODIMP CSeekingPassThru::NonDelegatingQueryInterface(REFIID riid, __deref_out void ** ppv)
+{
+    if (riid == IID_ISeekingPassThru) {
+        return GetInterface((ISeekingPassThru *) this, ppv);
+    } else {
+        if (m_pPosPassThru &&
+            (riid == IID_IMediaSeeking ||
+             riid == IID_IMediaPosition)) {
+            return m_pPosPassThru->NonDelegatingQueryInterface(riid,ppv);
+        } else {
+            return CUnknown::NonDelegatingQueryInterface(riid, ppv);
+        }
+    }
+}
+
+
+CSeekingPassThru::CSeekingPassThru( __in_opt LPCTSTR pName, __inout_opt LPUNKNOWN pUnk, __inout HRESULT *phr )
+                            : CUnknown(pName, pUnk, phr),
+                            m_pPosPassThru(NULL)
+{
+}
+
+
+CSeekingPassThru::~CSeekingPassThru()
+{
+    delete m_pPosPassThru;
+}
+
+STDMETHODIMP CSeekingPassThru::Init(BOOL bRendererSeeking, IPin *pPin)
+{
+    HRESULT hr = NOERROR;
+    if (m_pPosPassThru) {
+        hr = E_FAIL;
+    } else {
+        m_pPosPassThru =
+            bRendererSeeking ?
+                new CRendererPosPassThru(
+                    NAME("Render Seeking COM object"),
+                    (IUnknown *)this,
+                    &hr,
+                    pPin) :
+                new CPosPassThru(
+                    NAME("Render Seeking COM object"),
+                    (IUnknown *)this,
+                    &hr,
+                    pPin);
+        if (!m_pPosPassThru) {
+            hr = E_OUTOFMEMORY;
+        } else {
+            if (FAILED(hr)) {
+                delete m_pPosPassThru;
+                m_pPosPassThru = NULL;
+            }
+        }
+    }
+    return hr;
+}
+