基于TCP的流媒体播放器的问题

UUcall007 2011-01-11 04:12:44

各位大侠小弟最近要做一个TCP协议的流媒体播放器.服务器只是简单的把文件流通过socket发到客户端，客户端负责播放。我知道要开发一个source filter.但具体怎么做,没有思路.请大家给点意见。这种filter应该设计成拉模式的吧？还有就是如果出现音视频不同步,我该怎么做？请做过的大侠给点意见

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UUcall007 2011-01-17

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谁有经验啊给指点一下

UUcall007 2011-01-15

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用以下代码来模拟网络收流.这是个线程函数



UINT ReadMyFile(LPVOID lpParam)

{

	//	AfxMessageBox(L"Begin ReadMyFile");

	CFile f;

	PBYTE buf = new BYTE[32768];

	int   eof = 0;

	f.Open(L"\\NAND\\QQ.mpg",CFile::modeRead);

	while(1)//add buf 

	{

		eof = f.Read(buf,32768);//get new data,you can change it,example used socket 

		if(eof!=32768)//if data finish

			break;

		Sleep(1); 

		while(Stream.AddBuf(buf)==-1)

		{

			Sleep(1);

		}

	}

	f.Close();

	delete [] buf;

	return 0;

}

UUcall007 2011-01-15

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各位大侠我改写了DShow SDK那个Async 的例子只改写了memfile.h 代码如下



HANDLE hStartPlay  = NULL;

HANDLE hProtectBuf = NULL;

#define PLAYBUFSIZE 32768*10

class CMemStream : public CAsyncStream

{

public:

    CMemStream() :

		  m_llPosition(0),

			  m_BufSize(0),

		  m_dwKBPerSec(INFINITE)

	  {

		  hStartPlay  = CreateEvent(NULL,TRUE,TRUE,NULL);

		  hProtectBuf = CreateMutex(NULL,FALSE,NULL);

		  m_PlayBuf   = new BYTE[PLAYBUFSIZE];//自己定义的数据缓冲

	  }

	  

	HRESULT SetPointer(LONGLONG llPos)

	{

		return S_OK;

	}



    HRESULT Read(PBYTE pbBuffer,

                 DWORD dwBytesToRead,

                 BOOL bAlign,

                 LPDWORD pdwBytesRead)

    {

        CAutoLock lck(&m_csLock);

        DWORD dwReadLength;

        CString strDebug;

        dwReadLength = dwBytesToRead;



		while (32768>m_BufSize)

		{

			Sleep(1);

		}

	

        WaitForSingleObject(hProtectBuf,INFINITE);

        CopyMemory((PVOID)pbBuffer,(PVOID)m_PlayBuf,dwReadLength);

		strDebug.Format(L"m_BufSize:%d",m_BufSize);

		OutputDebugString(strDebug);

		         

		m_BufSize -= dwReadLength;    //未播放的数据大小减去刚刚播放的数据量dwReadLength

        CopyMemory((PVOID)m_PlayBuf, (PVOID)(m_PlayBuf+dwReadLength),m_BufSize); 

		ReleaseMutex(hProtectBuf);

		SetEvent(hStartPlay);         //可以播放了

        m_llPosition += dwReadLength;

        *pdwBytesRead = dwReadLength;

        return S_OK;

    }



    LONGLONG Size(LONGLONG *pSizeAvailable)

    {

        *pSizeAvailable = m_llLength;

        return 0x7FFFFFFF;

    }



    DWORD Alignment()

    {

        return 1;

    }

    void Lock()

    {

        m_csLock.Lock();

    }

    void Unlock()

    {

        m_csLock.Unlock();

    }

	LONGLONG AddBuf(PBYTE buf)

	{

		if ((m_BufSize +32768)>32768*10)

		{

			return -1;

		}

        WaitForSingleObject(hProtectBuf,INFINITE);		 

		CopyMemory((PVOID)(m_PlayBuf+m_BufSize),(PVOID)buf,32768);//把新的数据添加到缓冲中

		m_BufSize += 32768; 

		ReleaseMutex(hProtectBuf);

		return m_BufSize;

	}

	void FreeBuf()

	{

		delete [] m_PlayBuf;

	}



private:

    CCritSec       m_csLock;

    LONGLONG       m_llLength;

    LONGLONG       m_llPosition;

    DWORD          m_dwKBPerSec;

    DWORD          m_dwTimeStart;

	LONGLONG       m_BufSize;

	PBYTE          m_PlayBuf;



};





class CMemReader : public CAsyncReader

{

public:



    //  We're not going to be CoCreate'd so we don't need registration

    //  stuff etc

    STDMETHODIMP Register()

    {

        return S_OK;

    }



    STDMETHODIMP Unregister()

    {

        return S_OK;

    }



    CMemReader(CMemStream *pStream, CMediaType *pmt, HRESULT *phr) :

        CAsyncReader(NAME("Mem Reader\0"), NULL, pStream, phr)

    {

        m_mt = *pmt;

    }

};

在连接windows下的 mpeg splitter能播放，但在WinCE下连接其他厂家做的demux filter,就会在
hr = pBuilder->Render(pReader->GetPin(0));话下卡住。不知为何？哪位大侠有经验给指导指导。
那个demux filter的名字叫TCC CDK Demux filter.都憋了2天了。

vansbluge 2011-01-13

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[Quote=引用 10 楼 uucall007 的回复:]

看了一晚上没什么头绪哪位大侠给说说开发一个source filter的一般过程拉模式的 DShow的SDK那个Async 看的我一头雾水的
[/Quote]

简洁点的



class CMyStream

class CMySource : 

	public CSource,

	public IFileSourceFilter

{

       //..

       static DWORD WINAPI RecvSampleThreadProc(LPVOID lpParameter); //

       bool ProcSample(); //接收Sample后把Sample放进输出Pin的发送队列中

}



class CMyStream : public CSourceStream

{

        // plots a ball into the supplied video frame

	HRESULT FillBuffer(IMediaSample *pSamp);   //重写这里进行sample的处理和传递



        // Ask for buffers of the size appropriate to the agreed media type

	HRESULT DecideBufferSize(IMemAllocator *pAlloc,

		ALLOCATOR_PROPERTIES *pProperties);



	// Resets the stream time to zero

	HRESULT OnThreadCreate(void);    

	HRESULT OnThreadDestroy(void);

	HRESULT OnThreadStartPlay(void);



        void ResetTimestamps(IMediaSample *pSamp);  //重设timestamps

}