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diff --git a/thirdparties/win32/include/directshow/transfrm.h b/thirdparties/win32/include/directshow/transfrm.h
new file mode 100644
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+++ b/thirdparties/win32/include/directshow/transfrm.h
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+//------------------------------------------------------------------------------
+// File: Transfrm.h
+//
+// Desc: DirectShow base classes - defines classes from which simple 
+//       transform codecs may be derived.
+//
+// Copyright (c) 1992-2001 Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------------------------
+
+
+// It assumes the codec has one input and one output stream, and has no
+// interest in memory management, interface negotiation or anything else.
+//
+// derive your class from this, and supply Transform and the media type/format
+// negotiation functions. Implement that class, compile and link and
+// you're done.
+
+
+#ifndef __TRANSFRM__
+#define __TRANSFRM__
+
+// ======================================================================
+// This is the com object that represents a simple transform filter. It
+// supports IBaseFilter, IMediaFilter and two pins through nested interfaces
+// ======================================================================
+
+class CTransformFilter;
+
+// ==================================================
+// Implements the input pin
+// ==================================================
+
+class CTransformInputPin : public CBaseInputPin
+{
+    friend class CTransformFilter;
+
+protected:
+    CTransformFilter *m_pTransformFilter;
+
+
+public:
+
+    CTransformInputPin(
+        __in_opt LPCTSTR pObjectName,
+        __inout CTransformFilter *pTransformFilter,
+        __inout HRESULT * phr,
+        __in_opt LPCWSTR pName);
+#ifdef UNICODE
+    CTransformInputPin(
+        __in_opt LPCSTR pObjectName,
+        __inout CTransformFilter *pTransformFilter,
+        __inout HRESULT * phr,
+        __in_opt LPCWSTR pName);
+#endif
+
+    STDMETHODIMP QueryId(__deref_out LPWSTR * Id)
+    {
+        return AMGetWideString(L"In", Id);
+    }
+
+    // Grab and release extra interfaces if required
+
+    HRESULT CheckConnect(IPin *pPin);
+    HRESULT BreakConnect();
+    HRESULT CompleteConnect(IPin *pReceivePin);
+
+    // check that we can support this output type
+    HRESULT CheckMediaType(const CMediaType* mtIn);
+
+    // set the connection media type
+    HRESULT SetMediaType(const CMediaType* mt);
+
+    // --- IMemInputPin -----
+
+    // here's the next block of data from the stream.
+    // AddRef it yourself if you need to hold it beyond the end
+    // of this call.
+    STDMETHODIMP Receive(IMediaSample * pSample);
+
+    // provide EndOfStream that passes straight downstream
+    // (there is no queued data)
+    STDMETHODIMP EndOfStream(void);
+
+    // passes it to CTransformFilter::BeginFlush
+    STDMETHODIMP BeginFlush(void);
+
+    // passes it to CTransformFilter::EndFlush
+    STDMETHODIMP EndFlush(void);
+
+    STDMETHODIMP NewSegment(
+                        REFERENCE_TIME tStart,
+                        REFERENCE_TIME tStop,
+                        double dRate);
+
+    // Check if it's OK to process samples
+    virtual HRESULT CheckStreaming();
+
+    // Media type
+public:
+    CMediaType& CurrentMediaType() { return m_mt; };
+
+};
+
+// ==================================================
+// Implements the output pin
+// ==================================================
+
+class CTransformOutputPin : public CBaseOutputPin
+{
+    friend class CTransformFilter;
+
+protected:
+    CTransformFilter *m_pTransformFilter;
+
+public:
+
+    // implement IMediaPosition by passing upstream
+    IUnknown * m_pPosition;
+
+    CTransformOutputPin(
+        __in_opt LPCTSTR pObjectName,
+        __inout CTransformFilter *pTransformFilter,
+        __inout HRESULT * phr,
+        __in_opt LPCWSTR pName);
+#ifdef UNICODE
+    CTransformOutputPin(
+        __in_opt LPCSTR pObjectName,
+        __inout CTransformFilter *pTransformFilter,
+        __inout HRESULT * phr,
+        __in_opt LPCWSTR pName);
+#endif
+    ~CTransformOutputPin();
+
+    // override to expose IMediaPosition
+    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, __deref_out void **ppv);
+
+    // --- CBaseOutputPin ------------
+
+    STDMETHODIMP QueryId(__deref_out LPWSTR * Id)
+    {
+        return AMGetWideString(L"Out", Id);
+    }
+
+    // Grab and release extra interfaces if required
+
+    HRESULT CheckConnect(IPin *pPin);
+    HRESULT BreakConnect();
+    HRESULT CompleteConnect(IPin *pReceivePin);
+
+    // check that we can support this output type
+    HRESULT CheckMediaType(const CMediaType* mtOut);
+
+    // set the connection media type
+    HRESULT SetMediaType(const CMediaType *pmt);
+
+    // called from CBaseOutputPin during connection to ask for
+    // the count and size of buffers we need.
+    HRESULT DecideBufferSize(
+                IMemAllocator * pAlloc,
+                __inout ALLOCATOR_PROPERTIES *pProp);
+
+    // returns the preferred formats for a pin
+    HRESULT GetMediaType(int iPosition, __inout CMediaType *pMediaType);
+
+    // inherited from IQualityControl via CBasePin
+    STDMETHODIMP Notify(IBaseFilter * pSender, Quality q);
+
+    // Media type
+public:
+    CMediaType& CurrentMediaType() { return m_mt; };
+};
+
+
+class AM_NOVTABLE CTransformFilter : public CBaseFilter
+{
+
+public:
+
+    // map getpin/getpincount for base enum of pins to owner
+    // override this to return more specialised pin objects
+
+    virtual int GetPinCount();
+    virtual CBasePin * GetPin(int n);
+    STDMETHODIMP FindPin(LPCWSTR Id, __deref_out IPin **ppPin);
+
+    // override state changes to allow derived transform filter
+    // to control streaming start/stop
+    STDMETHODIMP Stop();
+    STDMETHODIMP Pause();
+
+public:
+
+    CTransformFilter(__in_opt LPCTSTR , __inout_opt LPUNKNOWN, REFCLSID clsid);
+#ifdef UNICODE
+    CTransformFilter(__in_opt LPCSTR , __inout_opt LPUNKNOWN, REFCLSID clsid);
+#endif
+    ~CTransformFilter();
+
+    // =================================================================
+    // ----- override these bits ---------------------------------------
+    // =================================================================
+
+    // These must be supplied in a derived class
+
+    virtual HRESULT Transform(IMediaSample * pIn, IMediaSample *pOut);
+
+    // check if you can support mtIn
+    virtual HRESULT CheckInputType(const CMediaType* mtIn) PURE;
+
+    // check if you can support the transform from this input to this output
+    virtual HRESULT CheckTransform(const CMediaType* mtIn, const CMediaType* mtOut) PURE;
+
+    // this goes in the factory template table to create new instances
+    // static CCOMObject * CreateInstance(__inout_opt LPUNKNOWN, HRESULT *);
+
+    // call the SetProperties function with appropriate arguments
+    virtual HRESULT DecideBufferSize(
+                        IMemAllocator * pAllocator,
+                        __inout ALLOCATOR_PROPERTIES *pprop) PURE;
+
+    // override to suggest OUTPUT pin media types
+    virtual HRESULT GetMediaType(int iPosition, __inout CMediaType *pMediaType) PURE;
+
+
+
+    // =================================================================
+    // ----- Optional Override Methods           -----------------------
+    // =================================================================
+
+    // you can also override these if you want to know about streaming
+    virtual HRESULT StartStreaming();
+    virtual HRESULT StopStreaming();
+
+    // override if you can do anything constructive with quality notifications
+    virtual HRESULT AlterQuality(Quality q);
+
+    // override this to know when the media type is actually set
+    virtual HRESULT SetMediaType(PIN_DIRECTION direction,const CMediaType *pmt);
+
+    // chance to grab extra interfaces on connection
+    virtual HRESULT CheckConnect(PIN_DIRECTION dir,IPin *pPin);
+    virtual HRESULT BreakConnect(PIN_DIRECTION dir);
+    virtual HRESULT CompleteConnect(PIN_DIRECTION direction,IPin *pReceivePin);
+
+    // chance to customize the transform process
+    virtual HRESULT Receive(IMediaSample *pSample);
+
+    // Standard setup for output sample
+    HRESULT InitializeOutputSample(IMediaSample *pSample, __deref_out IMediaSample **ppOutSample);
+
+    // if you override Receive, you may need to override these three too
+    virtual HRESULT EndOfStream(void);
+    virtual HRESULT BeginFlush(void);
+    virtual HRESULT EndFlush(void);
+    virtual HRESULT NewSegment(
+                        REFERENCE_TIME tStart,
+                        REFERENCE_TIME tStop,
+                        double dRate);
+
+#ifdef PERF
+    // Override to register performance measurement with a less generic string
+    // You should do this to avoid confusion with other filters
+    virtual void RegisterPerfId()
+         {m_idTransform = MSR_REGISTER(TEXT("Transform"));}
+#endif // PERF
+
+
+// implementation details
+
+protected:
+
+#ifdef PERF
+    int m_idTransform;                 // performance measuring id
+#endif
+    BOOL m_bEOSDelivered;              // have we sent EndOfStream
+    BOOL m_bSampleSkipped;             // Did we just skip a frame
+    BOOL m_bQualityChanged;            // Have we degraded?
+
+    // critical section protecting filter state.
+
+    CCritSec m_csFilter;
+
+    // critical section stopping state changes (ie Stop) while we're
+    // processing a sample.
+    //
+    // This critical section is held when processing
+    // events that occur on the receive thread - Receive() and EndOfStream().
+    //
+    // If you want to hold both m_csReceive and m_csFilter then grab
+    // m_csFilter FIRST - like CTransformFilter::Stop() does.
+
+    CCritSec m_csReceive;
+
+    // these hold our input and output pins
+
+    friend class CTransformInputPin;
+    friend class CTransformOutputPin;
+    CTransformInputPin *m_pInput;
+    CTransformOutputPin *m_pOutput;
+};
+
+#endif /* __TRANSFRM__ */
+
+