193 lines
4.6 KiB
C++
193 lines
4.6 KiB
C++
/*++
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Copyright (c) 1998-1999 Microsoft Corporation
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Module Name:
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rcastrm.h
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Abstract:
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Declaration of the CRCAMSPStream
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Author:
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Zoltan Szilagyi September 7th, 1998
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--*/
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#ifndef __RCASTRM_H_
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#define __RCASTRM_H_
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#if _MSC_VER >= 1000
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#pragma once
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#endif // _MSC_VER >= 1000
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#define BITS_PER_SAMPLE_AT_TERMINAL 16
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#define SAMPLE_RATE_AT_TERMINAL 8000
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// rest of format is assumed to be mono, linear pcm at the terminal.
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// See SetAudioFormat helper function.
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/////////////////////////////////////////////////////////////////////////////
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// CRCAMSPStream
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/////////////////////////////////////////////////////////////////////////////
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class CRCAMSPStream : public CMSPStream, public CMSPObjectSafetyImpl
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{
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public:
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// DECLARE_POLY_AGGREGATABLE(CRCAMSP)
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// To add extra interfaces to this class, use the following:
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BEGIN_COM_MAP(CRCAMSPStream)
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COM_INTERFACE_ENTRY( IObjectSafety )
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COM_INTERFACE_ENTRY_CHAIN(CMSPStream)
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END_COM_MAP()
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public:
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//
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// Construction and destruction.
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//
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CRCAMSPStream();
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virtual ~CRCAMSPStream();
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virtual void FinalRelease();
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//
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// Required base class overrides.
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//
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STDMETHOD (get_Name) (
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OUT BSTR * ppName
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);
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//
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// Override to allow us to create our filter on initialization.
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//
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virtual HRESULT Init(
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IN HANDLE hAddress,
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IN CMSPCallBase * pMSPCall,
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IN IMediaEvent * pGraph,
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IN DWORD dwMediaType,
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IN TERMINAL_DIRECTION Direction
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);
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//
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// We override these methods to implement our terminal handling.
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// This consists of only allowing one terminal on the stream at a time
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// and adding our filters and the terminal to the graph at the right
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// times.
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//
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STDMETHOD (SelectTerminal) (
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IN ITTerminal * pTerminal
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);
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STDMETHOD (UnselectTerminal) (
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IN ITTerminal * pTerminal
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);
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STDMETHOD (StartStream) ();
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STDMETHOD (PauseStream) ();
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STDMETHOD (StopStream) ();
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//
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// Overrides for event handling.
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//
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virtual HRESULT ProcessGraphEvent(
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IN long lEventCode,
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IN LONG_PTR lParam1,
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IN LONG_PTR lParam2
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);
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//
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// Public methods specific to our implementation.
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//
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virtual HRESULT SetVCHandle(IN DWORD dwVCHandle);
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virtual HRESULT FireEvent(IN MSP_CALL_EVENT type,
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IN HRESULT hrError,
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IN MSP_CALL_EVENT_CAUSE cause);
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protected:
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//
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// Protected data members.
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//
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BOOL m_fHaveVCHandle;
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DWORD m_dwBufferSizeOnWire;
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BOOL m_fTerminalConnected;
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IBaseFilter * m_pFilter;
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IBaseFilter * m_pG711Filter;
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FILTER_STATE m_DesiredGraphState;
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private:
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//
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// Private helper methods.
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//
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BOOL UseMulaw( void );
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HRESULT GetBufferSizeFromPin(
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IN IPin * pPin,
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OUT DWORD * pdwSize
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);
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HRESULT SetVCHandleOnPin(LPWSTR pszFileName, REFGUID formattype);
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HRESULT SetDataFormatOnPin(IPin *pBridgePin);
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HRESULT SetMediaTypeFormat(AM_MEDIA_TYPE* pAmMediaType,
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BYTE* pformat,
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ULONG length);
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HRESULT CreateRCAFilter( void );
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HRESULT PrepareG711Filter( void );
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HRESULT ConnectTerminal( IN ITTerminal * pTerminal );
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HRESULT ConnectToTerminalPin( IN IPin * pTerminalPin );
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HRESULT TryToConnect( IN IPin * pOutputPin,
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IN IPin * pInputPin );
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HRESULT ConnectUsingG711( IN IPin * pOutputPin,
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IN IPin * pInputPin );
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HRESULT FindPinInFilter(
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IN BOOL bWantOutputPin, // if false, want input pin
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IN IBaseFilter * pFilter, // the filter to examine
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OUT IPin ** ppPin // the pin we found
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);
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HRESULT FindPin(
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OUT IPin ** ppPin
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);
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HRESULT ConfigureCapture( IN IPin * pOutputPin,
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IN IPin * pInputPin );
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HRESULT ExamineCaptureSettings( IN IPin *pPin );
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};
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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//
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// Helper functions -- non-class members.
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//
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HRESULT SetAudioFormat(
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IN IUnknown* pIUnknown,
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IN WORD wBitPerSample,
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IN DWORD dwSampleRate
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);
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#endif //__WAVEADDR_H_
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