多媒体编程

开发平台：
Visual C++

StreamDriveThru.h：源码内容
							/* 
 *	Copyright (C) 2003-2005 Gabest
 *	http://www.gabest.org
 *
 *  This Program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2, or (at your option)
 *  any later version.
 *   
 *  This Program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *   
 *  You should have received a copy of the GNU General Public License
 *  along with GNU Make; see the file COPYING.  If not, write to
 *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
 *  http://www.gnu.org/copyleft/gpl.html
 *
 */
#pragma once
#include <atlbase.h>
#include "......DSUtilDSUtil.h"
class CStreamDriveThruInputPin : public CBasePin
{
	CComQIPtr<IAsyncReader> m_pAsyncReader;
public:
	CStreamDriveThruInputPin(TCHAR* pName, CBaseFilter* pFilter, CCritSec* pLock, HRESULT* phr);
	virtual ~CStreamDriveThruInputPin();
	HRESULT GetAsyncReader(IAsyncReader** ppAsyncReader);
	DECLARE_IUNKNOWN;
    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv);
    HRESULT CheckMediaType(const CMediaType* pmt);
    HRESULT CheckConnect(IPin* pPin);
    HRESULT BreakConnect();
	HRESULT CompleteConnect(IPin* pPin);
	STDMETHODIMP BeginFlush();
	STDMETHODIMP EndFlush();
};
class CStreamDriveThruOutputPin : public CBaseOutputPin
{
	CComQIPtr<IStream> m_pStream;
public:
	CStreamDriveThruOutputPin(TCHAR* pName, CBaseFilter* pFilter, CCritSec* pLock, HRESULT* phr);
	virtual ~CStreamDriveThruOutputPin();
	HRESULT GetStream(IStream** ppStream);
	DECLARE_IUNKNOWN;
    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv);
    HRESULT DecideBufferSize(IMemAllocator* pAlloc, ALLOCATOR_PROPERTIES* pProperties);
    HRESULT CheckMediaType(const CMediaType* pmt);
    HRESULT GetMediaType(int iPosition, CMediaType* pmt);
    HRESULT CheckConnect(IPin* pPin);
    HRESULT BreakConnect();
    HRESULT CompleteConnect(IPin* pPin);
	STDMETHODIMP BeginFlush();
	STDMETHODIMP EndFlush();
	STDMETHODIMP Notify(IBaseFilter* pSender, Quality q);
};
[uuid("534FE6FD-F1F0-4aec-9F45-FF397320CE33")]
class CStreamDriveThruFilter : public CBaseFilter, protected CAMThread, public IMediaSeeking
{
	CCritSec m_csLock;
	CStreamDriveThruInputPin* m_pInput;
	CStreamDriveThruOutputPin* m_pOutput;
protected:
	enum {CMD_EXIT, CMD_STOP, CMD_PAUSE, CMD_RUN};
    DWORD ThreadProc();
	LONGLONG m_position;
public:
	CStreamDriveThruFilter(LPUNKNOWN pUnk, HRESULT* phr);
	virtual ~CStreamDriveThruFilter();
	DECLARE_IUNKNOWN;
    STDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void** ppv);
	int GetPinCount();
	CBasePin* GetPin(int n);
	STDMETHODIMP Stop();
	STDMETHODIMP Pause();
	STDMETHODIMP Run(REFERENCE_TIME tStart);
	// IMediaSeeking
	STDMETHODIMP GetCapabilities(DWORD* pCapabilities);
	STDMETHODIMP CheckCapabilities(DWORD* pCapabilities);
	STDMETHODIMP IsFormatSupported(const GUID* pFormat);
	STDMETHODIMP QueryPreferredFormat(GUID* pFormat);
	STDMETHODIMP GetTimeFormat(GUID* pFormat);
	STDMETHODIMP IsUsingTimeFormat(const GUID* pFormat);
	STDMETHODIMP SetTimeFormat(const GUID* pFormat);
	STDMETHODIMP GetDuration(LONGLONG* pDuration);
	STDMETHODIMP GetStopPosition(LONGLONG* pStop);
	STDMETHODIMP GetCurrentPosition(LONGLONG* pCurrent);
	STDMETHODIMP ConvertTimeFormat(LONGLONG* pTarget, const GUID* pTargetFormat, LONGLONG Source, const GUID* pSourceFormat);
	STDMETHODIMP SetPositions(LONGLONG* pCurrent, DWORD dwCurrentFlags, LONGLONG* pStop, DWORD dwStopFlags);
	STDMETHODIMP GetPositions(LONGLONG* pCurrent, LONGLONG* pStop);
	STDMETHODIMP GetAvailable(LONGLONG* pEarliest, LONGLONG* pLatest);
	STDMETHODIMP SetRate(double dRate);
	STDMETHODIMP GetRate(double* pdRate);
	STDMETHODIMP GetPreroll(LONGLONG* pllPreroll);
};

						