网站界面需求,宁波妇科医院,全平台内容生成系统,北京网站制作人才下载本过滤器DLL 本过滤器读取视频文件输出视频流和音频流。流类型由文件决定。已知可读取的文件格式有#xff1a;AVI#xff0c;ASF#xff0c;MOV#xff0c;MP4#xff0c;MPG#xff0c;WMV。
过滤器信息
过滤器名称#xff1a;读视频文件 过滤器GUID#xff1a…下载本过滤器DLL 本过滤器读取视频文件输出视频流和音频流。流类型由文件决定。已知可读取的文件格式有AVIASFMOVMP4MPGWMV。
过滤器信息
过滤器名称读视频文件 过滤器GUID{29001AD7-37A5-45E0-A750-E76453B36E33} DLL注册函数名DllRegisterServer 删除注册函数名DllUnregisterServer 过滤器有2个输出引脚。
输出引脚1标识Video 输出引脚1媒体类型 主要类型MEDIATYPE_Video 子类型MEDIASUBTYPE_NULL
输出引脚2标识Audio 输出引脚2媒体类型 主要类型MEDIATYPE_Audio 子类型MEDIASUBTYPE_NULL
过滤器开发信息
过滤器实现了IFileSourceFilter接口用于指定要读取的视频文件。并在接口的Load方法中确定文件视频流音频流媒体类型设置给视频音频输出引脚并获取文件的时长。过滤器运行时创建媒体源线程在线程中创建媒体源并获取媒体源事件。媒体源启动后调用媒体源的Start方法将产生“创建了新流”事件事件值为视频或音频流接口。获取流接口后创建视频音频工作线程视频音频流线程。在线程中获取流事件。请求样本后会产生“产生新样本”事件事件值为样本接口其为媒体基础样本将其转换为引脚样本由引脚向下游发送。再请求下一个样本。过滤器停止时调用媒体源接口的Stop方法会产生“流停止”事件收到此事件后退出视频音频工作线程但媒体源线程仍未退出。再次运行过滤器时再次启动媒体源此时媒体源产生“流已更新”事件事件值为已更新的流接口。获取流接口后创建视频音频工作线程视频音频流线程。过滤器更改播放位置时即定位调用媒体源的Start方法在参数中指定新的开始位置媒体源也会产生“流已更新”事件此时只更新流接口不再创建新的视频音频工作线程因为线程已存在。媒体源会自动寻找关键帧从关键帧开始。要退出媒体源线程通过销毁过滤器或指定新的要读取的文件方式为发送“退出媒体源线程”事件信号。 IMediaSeeking接口用于调整播放的当前位置定位。可以在过滤器实现也可以在任一引脚实现。如果在引脚实现最好在音频引脚。
过滤器DLL的全部代码
DLL.h
#ifndef DLL_FILE
#define DLL_FILE#include strmbase10.h//过滤器基类定义文件#if _DEBUG
#pragma comment(lib, strmbasd10.lib)//过滤器基类实现文件调试版本
#else
#pragma comment(lib, strmbase10.lib)//过滤器基类实现文件发布版本
#endif// {29001AD7-37A5-45E0-A750-E76453B36E33}
DEFINE_GUID(CLSID_Reader,//过滤器GUID0x29001ad7, 0x37a5, 0x45e0, 0xa7, 0x50, 0xe7, 0x64, 0x53, 0xb3, 0x6e, 0x33);#include mfapi.h
#include mfidl.h
#include mferror.h
#include evr.h
#pragma comment(lib, mfplat.lib)
#pragma comment(lib, mf.lib)class CPin2;
class CFilter;class CPin1 : public CBaseOutputPin
{friend class CPin2;friend class CFilter;
public:CPin1(CFilter *pFilter, HRESULT *phr, LPCWSTR pPinName);~CPin1();DECLARE_IUNKNOWNSTDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void **ppvoid);BOOL HasSet FALSE;HRESULT CheckMediaType(const CMediaType *pmt);HRESULT GetMediaType(int iPosition, CMediaType *pMediaType);HRESULT SetMediaType(const CMediaType *pmt);HRESULT BreakConnect();HRESULT DecideBufferSize(IMemAllocator *pMemAllocator, ALLOCATOR_PROPERTIES * ppropInputRequest);CFilter *pCFilter NULL;STDMETHODIMP Notify(IBaseFilter *pSelf, Quality q){return E_FAIL;}
};class CPin2 : public CBaseOutputPin, public IMediaSeeking
{friend class CPin1;friend class CFilter;
public:CPin2(CFilter *pFilter, HRESULT *phr, LPCWSTR pPinName);~CPin2();DECLARE_IUNKNOWNSTDMETHODIMP NonDelegatingQueryInterface(REFIID riid, void **ppvoid);BOOL HasSet FALSE;HRESULT CheckMediaType(const CMediaType *pmt);HRESULT GetMediaType(int iPosition, CMediaType *pMediaType);HRESULT SetMediaType(const CMediaType *pmt);HRESULT BreakConnect();HRESULT DecideBufferSize(IMemAllocator *pMemAllocator, ALLOCATOR_PROPERTIES * ppropInputRequest);CFilter *pCFilter NULL;DWORD m_dwSeekingCaps AM_SEEKING_CanSeekForwards | AM_SEEKING_CanSeekBackwards | AM_SEEKING_CanSeekAbsolute | AM_SEEKING_CanGetStopPos | AM_SEEKING_CanGetDuration;HRESULT STDMETHODCALLTYPE CheckCapabilities(DWORD *pCapabilities);HRESULT STDMETHODCALLTYPE ConvertTimeFormat(LONGLONG *pTarget, const GUID *pTargetFormat, LONGLONG Source, const GUID *pSourceFormat);HRESULT STDMETHODCALLTYPE GetAvailable(LONGLONG *pEarliest, LONGLONG *pLatest);HRESULT STDMETHODCALLTYPE GetCapabilities(DWORD *pCapabilities);HRESULT STDMETHODCALLTYPE GetCurrentPosition(LONGLONG *pCurrent);HRESULT STDMETHODCALLTYPE GetDuration(LONGLONG *pDuration);HRESULT STDMETHODCALLTYPE GetPositions(LONGLONG *pCurrent, LONGLONG *pStop);HRESULT STDMETHODCALLTYPE GetPreroll(LONGLONG *pllPreroll);HRESULT STDMETHODCALLTYPE GetRate(double *pdRate);HRESULT STDMETHODCALLTYPE GetStopPosition(LONGLONG *pStop);HRESULT STDMETHODCALLTYPE GetTimeFormat(GUID *pFormat);HRESULT STDMETHODCALLTYPE IsFormatSupported(const GUID *pFormat);HRESULT STDMETHODCALLTYPE IsUsingTimeFormat(const GUID *pFormat);HRESULT STDMETHODCALLTYPE QueryPreferredFormat(GUID *pFormat);HRESULT STDMETHODCALLTYPE SetPositions(LONGLONG *pCurrent, DWORD dwCurrentFlags, LONGLONG *pStop, DWORD dwStopFlags);HRESULT STDMETHODCALLTYPE SetRate(double dRate);HRESULT STDMETHODCALLTYPE SetTimeFormat(const GUID *pFormat);STDMETHODIMP Notify(IBaseFilter *pSelf, Quality q){return E_FAIL;}
};class CFilter : public CCritSec, public CBaseFilter, public IFileSourceFilter
{friend class CPin1;friend class CPin2;
public:CFilter(TCHAR* pName, LPUNKNOWN pUnk, HRESULT* hr);~CFilter();CBasePin* GetPin(int n);int GetPinCount();static CUnknown * WINAPI CreateInstance(LPUNKNOWN pUnk, HRESULT *phr);DECLARE_IUNKNOWNSTDMETHODIMP NonDelegatingQueryInterface(REFIID iid, void ** ppv);STDMETHODIMP Load(LPCOLESTR lpwszFileName, const AM_MEDIA_TYPE *pmt);STDMETHODIMP GetCurFile(LPOLESTR * ppszFileName, AM_MEDIA_TYPE *pmt);HRESULT GetMediaType();//获取视频音频流媒体类型REFERENCE_TIME mStart 0;HANDLE hSourceThread NULL;//媒体源线程句柄HANDLE hVideoThread NULL;//视频流线程句柄HANDLE hAudioThread NULL;//音频流线程句柄HANDLE hExit NULL;// “退出媒体源线程”事件句柄HANDLE hInit NULL;//“媒体源已创建”事件句柄STDMETHODIMP Pause();STDMETHODIMP Stop();CPin1* pCPin1 NULL;//视频引脚指针CPin2* pCPin2 NULL;//音频引脚指针WCHAR* m_pFileName NULL;//要读取的视频文件路径LONGLONG DUR 0;//持续时间100纳秒单位LONGLONG CUR 0;//当前位置单位100纳秒IMFMediaType* pVideoType NULL;//视频媒体类型IMFMediaType* pAudioType NULL;//音频媒体类型IMFMediaSource *pIMFMediaSource NULL;//媒体源接口IMFPresentationDescriptor* pISourceD NULL;//演示文稿描述符IMFMediaStream* pVideoStream NULL;//视频流接口IMFMediaStream* pAudioStream NULL;//音频流接口
};template class T void SafeRelease(T** ppT)
{if (*ppT){(*ppT)-Release();*ppT NULL;}
}#endif //DLL_FILE
DLL.cpp
#include DLL.hconst AMOVIESETUP_MEDIATYPE Pin1Type //引脚1媒体类型
{MEDIATYPE_Video, //主要类型MEDIASUBTYPE_NULL //子类型
};const AMOVIESETUP_MEDIATYPE Pin2Type //引脚2媒体类型
{MEDIATYPE_Audio, //主要类型MEDIASUBTYPE_NULL //子类型
};const AMOVIESETUP_PIN sudPins[] //引脚信息
{{LVideo, //引脚名称FALSE, //渲染引脚TRUE, //输出引脚FALSE, //具有该引脚的零个实例FALSE, //可以创建一个以上引脚的实例CLSID_NULL, //该引脚连接的过滤器的类标识NULL, //该引脚连接的引脚名称1, //引脚支持的媒体类型数Pin1Type //媒体类型信息},{LAudio, //引脚名称FALSE, //渲染引脚TRUE, //输出引脚FALSE, //具有该引脚的零个实例FALSE, //可以创建一个以上引脚的实例CLSID_NULL, //该引脚连接的过滤器的类标识NULL, //该引脚连接的引脚名称1, //引脚支持的媒体类型数Pin2Type //媒体类型信息}
};const AMOVIESETUP_FILTER Reader //过滤器的注册信息
{CLSID_Reader, //过滤器的类标识L读视频文件, //过滤器的名称MERIT_DO_NOT_USE, //过滤器优先值2, //引脚数量sudPins //引脚信息
};CFactoryTemplate g_Templates[] //类工厂模板数组
{{L读视频文件, //对象这里为过滤器名称CLSID_Reader, //对象CLSID的指针CFilter::CreateInstance, //创建对象实例的函数的指针NULL, //指向从DLL入口点调用的函数的指针Reader //指向AMOVIESETUP_FILTER结构的指针}
};int g_cTemplates 1;//模板数组大小STDAPI DllRegisterServer()//注册DLL
{return AMovieDllRegisterServer2(TRUE);
}STDAPI DllUnregisterServer()//删除DLL注册
{return AMovieDllRegisterServer2(FALSE);
}extern C BOOL WINAPI DllEntryPoint(HINSTANCE, ULONG, LPVOID);BOOL APIENTRY DllMain(HANDLE hModule, DWORD dwReason, LPVOID lpReserved)
{return DllEntryPoint((HINSTANCE)(hModule), dwReason, lpReserved);
}
CFilter.cpp
#include DLL.h
#include strsafe.hDWORD WINAPI MediaSourceThread(LPVOID pParam);
DWORD WINAPI VideoThread(LPVOID pParam);
DWORD WINAPI AudioThread(LPVOID pParam);CFilter::CFilter(TCHAR *pName, LPUNKNOWN pUnk, HRESULT *phr) : CBaseFilter(NAME(读视频文件), pUnk, this, CLSID_Reader)
{HRESULT hr MFStartup(MF_VERSION);//初始化媒体基础if (hr ! S_OK){MessageBox(NULL, L初始化媒体基础失败, L读视频文件, MB_OK); return;}pCPin1 new CPin1(this, phr, LVideo);//创建视频输出引脚pCPin2 new CPin2(this, phr, LAudio);//创建音频输出引脚hExit CreateEvent(NULL, FALSE, FALSE, NULL);//自动重置初始无信号hInit CreateEvent(NULL, FALSE, FALSE, NULL);//自动重置初始无信号
}CFilter::~CFilter()
{SetEvent(hExit);//发送“退出媒体源线程”信号SafeRelease(pVideoType); SafeRelease(pAudioType);//释放媒体类型if (m_pFileName)delete[] m_pFileName;MFShutdown();//关闭媒体基础CloseHandle(hSourceThread); CloseHandle(hVideoThread); CloseHandle(hAudioThread); CloseHandle(hExit); CloseHandle(hInit);
}CBasePin *CFilter::GetPin(int n)
{if (n 0)return pCPin1;if (n 1)return pCPin2;return NULL;
}int CFilter::GetPinCount()
{return 2;
}CUnknown * WINAPI CFilter::CreateInstance(LPUNKNOWN pUnk, HRESULT *phr)
{return new CFilter(NAME(读视频文件), pUnk, phr);
}STDMETHODIMP CFilter::NonDelegatingQueryInterface(REFIID iid, void ** ppv)
{if (iid IID_IFileSourceFilter){return GetInterface(static_castIFileSourceFilter*(this), ppv);}elsereturn CBaseFilter::NonDelegatingQueryInterface(iid, ppv);
}STDMETHODIMP CFilter::Load(LPCOLESTR lpwszFileName, const AM_MEDIA_TYPE *pmt)
{CheckPointer(lpwszFileName, E_POINTER);if (wcslen(lpwszFileName) MAX_PATH || wcslen(lpwszFileName)4)return ERROR_FILENAME_EXCED_RANGE;size_t len 1 lstrlenW(lpwszFileName);if (m_pFileName ! NULL)delete[] m_pFileName;m_pFileName new WCHAR[len];if (m_pFileName NULL)return E_OUTOFMEMORY;HRESULT hr StringCchCopyW(m_pFileName, len, lpwszFileName);hr GetMediaType();//获取视频音频流媒体类型if (hr ! S_OK)//如果获取媒体类型失败{delete[] m_pFileName; m_pFileName NULL;return VFW_E_INVALID_FILE_FORMAT;//设置文件名失败}return S_OK;
}STDMETHODIMP CFilter::GetCurFile(LPOLESTR * ppszFileName, AM_MEDIA_TYPE *pmt)
{CheckPointer(ppszFileName, E_POINTER);*ppszFileName NULL;if (m_pFileName ! NULL){DWORD n sizeof(WCHAR)*(1 lstrlenW(m_pFileName));*ppszFileName (LPOLESTR)CoTaskMemAlloc(n);if (*ppszFileName ! NULL){CopyMemory(*ppszFileName, m_pFileName, n); return S_OK;}}return S_FALSE;
}HRESULT CFilter::GetMediaType()//获取视频音频流媒体类型
{DWORD dw WaitForSingleObject(hSourceThread, 0);if (dw WAIT_TIMEOUT)//如果媒体源线程正在运行{SetEvent(hExit);//发送“退出媒体源线程”信号WaitForSingleObject(hSourceThread, INFINITE);//等待媒体源线程退出}SafeRelease(pVideoType); SafeRelease(pAudioType);//释放媒体类型IMFPresentationDescriptor* pSourceD NULL;//演示文稿描述符IMFMediaSource *pMFMediaSource NULL;//媒体源接口IMFStreamDescriptor* pStreamD1 NULL;//流1描述符IMFStreamDescriptor* pStreamD2 NULL;//流2描述符IMFMediaTypeHandler* pHandle1 NULL;//流1媒体类型处理器IMFMediaTypeHandler* pHandle2 NULL;//流2媒体类型处理器IMFSourceResolver* pSourceResolver NULL;//源解析器HRESULT hr MFCreateSourceResolver(pSourceResolver);//创建源解析器MF_OBJECT_TYPE ObjectType MF_OBJECT_INVALID;IUnknown* pSource NULL;if (SUCCEEDED(hr)){hr pSourceResolver-CreateObjectFromURL(//从URL创建媒体源m_pFileName, //源的URLMF_RESOLUTION_MEDIASOURCE, //创建源对象NULL, //可选属性存储ObjectType, //接收创建的对象类型pSource //接收指向媒体源的指针);}SafeRelease(pSourceResolver);//释放源解析器if (SUCCEEDED(hr)){hr pSource-QueryInterface(IID_PPV_ARGS(pMFMediaSource));//获取媒体源接口}SafeRelease(pSource);//释放IUnknown接口if (SUCCEEDED(hr)){hr pMFMediaSource-CreatePresentationDescriptor(pSourceD);//获取演示文稿描述符}if (SUCCEEDED(hr)){hr pSourceD-GetUINT64(MF_PD_DURATION, (UINT64*)DUR);//获取文件流的时长100纳秒为单位}BOOL Selected;if (SUCCEEDED(hr)){hr pSourceD-GetStreamDescriptorByIndex(0, Selected, pStreamD1);//获取流1描述符}if (SUCCEEDED(hr)){hr pStreamD1-GetMediaTypeHandler(pHandle1);//获取流1媒体类型处理器}SafeRelease(pStreamD1);//释放流1描述符GUID guid;if (SUCCEEDED(hr)){hr pHandle1-GetMajorType(guid);//获取流1主要类型}if (SUCCEEDED(hr)){if (guid MEDIATYPE_Video)//如果是视频{hr pHandle1-GetCurrentMediaType(pVideoType);//获取视频流的媒体类型}else if (guid MEDIATYPE_Audio)//如果是音频{hr pHandle1-GetCurrentMediaType(pAudioType);//获取音频流的媒体类型}}SafeRelease(pHandle1);//释放流1媒体类型处理器if (SUCCEEDED(hr)){hr pSourceD-GetStreamDescriptorByIndex(1, Selected, pStreamD2);//获取流2描述符}if (SUCCEEDED(hr)){hr pStreamD2-GetMediaTypeHandler(pHandle2);//获取流2媒体类型处理器}SafeRelease(pStreamD2);//释放流2描述符if (SUCCEEDED(hr)){hr pHandle2-GetMajorType(guid);//获取流2主要类型}if (SUCCEEDED(hr)){if (guid MEDIATYPE_Video)//如果是视频{hr pHandle2-GetCurrentMediaType(pVideoType);//获取视频流的媒体类型}else if (guid MEDIATYPE_Audio)//如果是音频{hr pHandle2-GetCurrentMediaType(pAudioType);//获取音频流的媒体类型}}SafeRelease(pHandle2);//释放流2媒体类型处理器SafeRelease(pSourceD);//释放演示文稿描述符SafeRelease(pMFMediaSource);//释放媒体源接口return hr;
}STDMETHODIMP CFilter::Pause()
{if (m_State State_Stopped){DWORD dw WaitForSingleObject(hSourceThread, 0);if (dw WAIT_FAILED || dw WAIT_OBJECT_0)//如果媒体源线程没有创建或已退出{hSourceThread CreateThread(NULL, 0, MediaSourceThread, this, 0, NULL);//创建媒体源线程WaitForSingleObject(hInit, INFINITE);//等待媒体源创建成功}mStart 0;PROPVARIANT var;PropVariantInit(var);var.vt VT_I8;var.hVal.QuadPart mStart;HRESULT hr pIMFMediaSource-Start(pISourceD, NULL, var);//启动媒体源PropVariantClear(var);}return CBaseFilter::Pause();
}STDMETHODIMP CFilter::Stop()
{HRESULT hr pIMFMediaSource-Stop();return CBaseFilter::Stop();
}DWORD WINAPI MediaSourceThread(LPVOID pParam)//媒体源线程
{CFilter* pCFilter (CFilter*)pParam;HRESULT hr, hr1, hr2;IMFMediaStream* pIMFMediaStream NULL;IMFStreamDescriptor* pIMFStreamDescriptor NULL;IMFMediaTypeHandler* pHandler NULL;pCFilter-pVideoStream NULL;//视频流接口pCFilter-pAudioStream NULL;//音频流接口IMFSourceResolver* pSourceResolver NULL;//源解析器hr MFCreateSourceResolver(pSourceResolver);//创建源解析器MF_OBJECT_TYPE ObjectType MF_OBJECT_INVALID;IUnknown* pSource NULL;if (SUCCEEDED(hr)){hr pSourceResolver-CreateObjectFromURL(//从URL创建媒体源pCFilter-m_pFileName, //源的URLMF_RESOLUTION_MEDIASOURCE, //创建源对象NULL, //可选属性存储ObjectType, //接收创建的对象类型pSource //接收指向媒体源的指针);}SafeRelease(pSourceResolver);//释放源解析器if (SUCCEEDED(hr)){hr pSource-QueryInterface(IID_PPV_ARGS(pCFilter-pIMFMediaSource));//获取媒体源接口}SafeRelease(pSource);//释放IUnknown接口if (SUCCEEDED(hr)){hr pCFilter-pIMFMediaSource-CreatePresentationDescriptor(pCFilter-pISourceD);//获取演示文稿描述符}if (hr ! S_OK){SafeRelease(pCFilter-pIMFMediaSource);//释放媒体源接口return hr;}SetEvent(pCFilter-hInit);//发送“媒体源已创建”信号Agan:GUID guid;IMFMediaEvent* pSourceEvent NULL;hr1 pCFilter-pIMFMediaSource-GetEvent(MF_EVENT_FLAG_NO_WAIT, pSourceEvent);//获取媒体源事件不等待DWORD dw WaitForSingleObject(pCFilter-hExit, 0);//检测“退出媒体源线程”信号if (dw WAIT_OBJECT_0)//如果有“退出媒体源线程”信号{hr pCFilter-pIMFMediaSource-Stop();pCFilter-pIMFMediaSource-Shutdown();SafeRelease(pCFilter-pISourceD);//释放演示文稿描述符SafeRelease(pCFilter-pIMFMediaSource);//释放媒体源return 1;//退出线程}if (SUCCEEDED(hr1))//如果获取媒体源事件成功{MediaEventType MET;hr2 pSourceEvent-GetType(MET);//获取媒体源事件类型if (SUCCEEDED(hr2)){PROPVARIANT vr;PropVariantInit(vr);hr pSourceEvent-GetValue(vr);//获取事件值switch (MET){case MENewStream://如果是“创建了新流”事件hr vr.punkVal-QueryInterface(pIMFMediaStream);//获取流接口vr.punkVal-Release();//释放IUnknown接口hr pIMFMediaStream-GetStreamDescriptor(pIMFStreamDescriptor);//获取流描述符hr pIMFStreamDescriptor-GetMediaTypeHandler(pHandler);//获取媒体类型处理器SafeRelease(pIMFStreamDescriptor);//释放流描述符hr pHandler-GetMajorType(guid);//获取主要类型SafeRelease(pHandler);//释放类型处理器if (guid MEDIATYPE_Video)//如果是视频流{pCFilter-pVideoStream pIMFMediaStream;//获取视频流hr pCFilter-pVideoStream-RequestSample(NULL);//视频流请求样本第1个样本pCFilter-hVideoThread CreateThread(NULL, 0, VideoThread, pCFilter, 0, NULL);//创建视频工作线程}if (guid MEDIATYPE_Audio)//如果是音频流{pCFilter-pAudioStream pIMFMediaStream;//获取音频流hr pCFilter-pAudioStream-RequestSample(NULL);//音频流请求样本第1个样本pCFilter-hAudioThread CreateThread(NULL, 0, AudioThread, pCFilter, 0, NULL);//创建音频工作线程}break;case MEUpdatedStream://如果是“流已更新”定位或重启时发送hr vr.punkVal-QueryInterface(pIMFMediaStream);//获取流接口vr.punkVal-Release();//释放IUnknown接口hr pIMFMediaStream-GetStreamDescriptor(pIMFStreamDescriptor);//获取流描述符hr pIMFStreamDescriptor-GetMediaTypeHandler(pHandler);//获取媒体类型处理器SafeRelease(pIMFStreamDescriptor);//释放流描述符hr pHandler-GetMajorType(guid);//获取主要类型SafeRelease(pHandler);//释放类型处理器if (guid MEDIATYPE_Video)//如果是视频流{pCFilter-pVideoStream pIMFMediaStream;//获取视频流hr pCFilter-pVideoStream-RequestSample(NULL);//视频流请求第1个样本DWORD dw WaitForSingleObject(pCFilter-hVideoThread, 0);if (dw WAIT_OBJECT_0)//如果视频工作线程已退出。防止在SEEK时创建新线程{pCFilter-hVideoThread CreateThread(NULL, 0, VideoThread, pCFilter, 0, NULL);//创建视频工作线程}}if (guid MEDIATYPE_Audio)//如果是音频流{pCFilter-pAudioStream pIMFMediaStream;//获取音频流hr pCFilter-pAudioStream-RequestSample(NULL);//音频流请求第1个样本DWORD dw WaitForSingleObject(pCFilter-hAudioThread, 0);if (dw WAIT_OBJECT_0)//如果音频工作线程已退出。防止在SEEK时创建新线程{pCFilter-hAudioThread CreateThread(NULL, 0, AudioThread, pCFilter, 0, NULL);//创建音频工作线程}}break;}PropVariantClear(vr);}SafeRelease(pSourceEvent);//释放媒体源事件}goto Agan;
}DWORD WINAPI VideoThread(LPVOID pParam)//视频工作线程
{CFilter* pCFilter (CFilter*)pParam;HRESULT hr;hr pCFilter-pCPin1-DeliverBeginFlush();Sleep(200);hr pCFilter-pCPin1-DeliverEndFlush();hr pCFilter-pCPin1-DeliverNewSegment(0, pCFilter-DUR - pCFilter-mStart, 1.0);
Agan:HRESULT hr1, hr2;IMFSample* pIMFSample NULL;IMFMediaEvent* pStreamEvent NULL;hr1 pCFilter-pVideoStream-GetEvent(0, pStreamEvent);//获取媒体流事件无限期等待if (hr1 S_OK){MediaEventType meType MEUnknown;hr2 pStreamEvent-GetType(meType);//获取事件类型if (hr2 S_OK){PROPVARIANT var;PropVariantInit(var);hr pStreamEvent-GetValue(var);//获取事件值switch (meType){case MEMediaSample://如果是“产生新样本”事件hr var.punkVal-QueryInterface(pIMFSample);//获取样本接口if (hr S_OK){HRESULT hrA, hrB;UINT32 CleanPoint;hrA pIMFSample-GetUINT32(MFSampleExtension_CleanPoint, CleanPoint);//是否为关键帧UINT32 Discontinuity;hrB pIMFSample-GetUINT32(MFSampleExtension_Discontinuity, Discontinuity);//是否包含中断标志LONGLONG star, dur;hr pIMFSample-GetSampleTime(star);hr pIMFSample-GetSampleDuration(dur);DWORD len;hr pIMFSample-GetTotalLength(len);DWORD Count;hr pIMFSample-GetBufferCount(Count);IMFMediaBuffer* pBuffer NULL;if (Count 1)hr pIMFSample-GetBufferByIndex(0, pBuffer);elsehr pIMFSample-ConvertToContiguousBuffer(pBuffer);//将具有多个缓冲区的样本转换为具有单个缓冲区的样本BYTE* pData NULL; DWORD MLen, CLen;hr pBuffer-Lock(pData, MLen, CLen);IMediaSample *pOutSample NULL;hr pCFilter-pCPin1-GetDeliveryBuffer(pOutSample, NULL, NULL, 0);//获取一个空的输出引脚样本if (hr S_OK){BYTE* pOutBuffer NULL;hr pOutSample-GetPointer(pOutBuffer);//获取输出引脚样本缓冲区指针if (pOutBuffer pData len 10000000)CopyMemory(pOutBuffer, pData, len);LONGLONG STAR star - pCFilter-mStart, END STAR dur;hr pOutSample-SetTime(STAR, END);//设置输出引脚样本时间戳hr pOutSample-SetActualDataLength(len);//设置输出引脚样本有效数据长度if (hrA S_OK){if (CleanPoint)//如果是关键帧hr pOutSample-SetSyncPoint(TRUE);//设置同步点标志elsehr pOutSample-SetSyncPoint(FALSE);}if (hrB S_OK){if (Discontinuity)//如果有中断标志{hr pOutSample-SetDiscontinuity(TRUE);//设置中断标志}elsehr pOutSample-SetDiscontinuity(FALSE);}hr pCFilter-pCPin1-Deliver(pOutSample);//输出引脚向下游发送样本pOutSample-Release();//释放输出引脚样本}pBuffer-Unlock(); SafeRelease(pBuffer); SafeRelease(pIMFSample);hr pCFilter-pVideoStream-RequestSample(NULL);//请求下一个样本}break;case MEEndOfStream://如果是“流结束”事件hr pCFilter-pCPin1-DeliverEndOfStream();break;case MEStreamStopped://如果是“流停止”事件PropVariantClear(var);SafeRelease(pStreamEvent);return 1;//终止视频工作线程}PropVariantClear(var);}SafeRelease(pStreamEvent);}goto Agan;
}DWORD WINAPI AudioThread(LPVOID pParam)//音频工作线程
{CFilter* pCFilter (CFilter*)pParam;HRESULT hr, hrA, hrB;hr pCFilter-pCPin2-DeliverBeginFlush();Sleep(100);hr pCFilter-pCPin2-DeliverEndFlush();hr pCFilter-pCPin2-DeliverNewSegment(0, pCFilter-DUR - pCFilter-mStart, 1.0);
Agan:HRESULT hr1, hr2;IMFSample* pIMFSample NULL;IMFMediaEvent* pStreamEvent NULL;hr1 pCFilter-pAudioStream-GetEvent(0, pStreamEvent);//获取媒体流事件无限期等待if (hr1 S_OK){MediaEventType meType MEUnknown;hr2 pStreamEvent-GetType(meType);//获取事件类型if (hr2 S_OK){PROPVARIANT var;PropVariantInit(var);hr pStreamEvent-GetValue(var);//获取事件值switch (meType){case MEMediaSample://如果是“产生新样本”事件hr var.punkVal-QueryInterface(pIMFSample);//获取样本接口if (hr S_OK){UINT32 CleanPoint;hrA pIMFSample-GetUINT32(MFSampleExtension_CleanPoint, CleanPoint);//是否为关键帧UINT32 Discontinuity;hrB pIMFSample-GetUINT32(MFSampleExtension_Discontinuity, Discontinuity);//是否包含中断标志LONGLONG star, dur;hr pIMFSample-GetSampleTime(star);pCFilter-CUR star;//音频当前位置hr pIMFSample-GetSampleDuration(dur);DWORD Count;hr pIMFSample-GetBufferCount(Count);IMFMediaBuffer* pBuffer NULL;if (Count 1)hr pIMFSample-GetBufferByIndex(0, pBuffer);elsehr pIMFSample-ConvertToContiguousBuffer(pBuffer);//将具有多个缓冲区的样本转换为具有单个缓冲区的样本BYTE* pData NULL;hr pBuffer-Lock(pData, NULL, NULL);DWORD len;hr pIMFSample-GetTotalLength(len);IMediaSample *pOutSample NULL;hr pCFilter-pCPin2-GetDeliveryBuffer(pOutSample, NULL, NULL, 0);//获取一个空的输出引脚样本if (hr S_OK){BYTE* pOutBuffer NULL;hr pOutSample-GetPointer(pOutBuffer);//获取输出引脚样本缓冲区指针if (pOutBuffer pData len 1000000)CopyMemory(pOutBuffer, pData, len);LONGLONG STAR star - pCFilter-mStart, END STAR dur;hr pOutSample-SetTime(STAR, END);//设置输出引脚样本时间戳hr pOutSample-SetActualDataLength(len);//设置输出引脚样本有效数据长度if (hrA S_OK){if (CleanPoint)//如果是关键帧hr pOutSample-SetSyncPoint(TRUE);//设置同步点标志elsehr pOutSample-SetSyncPoint(FALSE);}if (hrB S_OK){if (Discontinuity)//如果有中断标志{hr pOutSample-SetDiscontinuity(TRUE);//设置中断标志}elsehr pOutSample-SetDiscontinuity(FALSE);}hr pCFilter-pCPin2-Deliver(pOutSample);//输出引脚向下游发送样本pOutSample-Release();//释放输出引脚样本}pBuffer-Unlock(); SafeRelease(pBuffer); SafeRelease(pIMFSample);hr pCFilter-pAudioStream-RequestSample(NULL);//请求下一个样本}break;case MEEndOfStream://如果是“流结束”事件hr pCFilter-pCPin2-DeliverEndOfStream();break;case MEStreamStopped://如果是“流停止”事件PropVariantClear(var);SafeRelease(pStreamEvent);return 1;//终止音频工作线程}PropVariantClear(var);}SafeRelease(pStreamEvent);}goto Agan;
}
CPin1.cpp
#include DLL.hCPin1::CPin1(CFilter *pFilter, HRESULT *phr, LPCWSTR pPinName) : CBaseOutputPin(NAME(Video), pFilter, pFilter, phr, pPinName)
{pCFilter pFilter;
}CPin1::~CPin1()
{}STDMETHODIMP CPin1::NonDelegatingQueryInterface(REFIID riid, void **ppv)
{if (riid IID_IQualityControl){return CBasePin::NonDelegatingQueryInterface(riid, ppv);}elsereturn CBasePin::NonDelegatingQueryInterface(riid, ppv);
}HRESULT CPin1::CheckMediaType(const CMediaType *pmt)
{AM_MEDIA_TYPE* pMt NULL;pCFilter-pVideoType-GetRepresentation(AM_MEDIA_TYPE_REPRESENTATION, (void**)pMt);//将IMFMediaType表示的媒体类型转换为AM_MEDIA_TYPE结构形式CMediaType MT(*pMt);if (pmt-MatchesPartial(MT)){pCFilter-pVideoType-FreeRepresentation(AM_MEDIA_TYPE_REPRESENTATION, pMt);//释放GetRepresentation分配的内存return S_OK;}pCFilter-pVideoType-FreeRepresentation(AM_MEDIA_TYPE_REPRESENTATION, pMt);//释放GetRepresentation分配的内存return S_FALSE;
}HRESULT CPin1::GetMediaType(int iPosition, CMediaType *pmt)
{if (pCFilter-m_pFileName NULL)return S_FALSE;if (iPosition 0){AM_MEDIA_TYPE* pMt NULL;pCFilter-pVideoType-GetRepresentation(AM_MEDIA_TYPE_REPRESENTATION, (void**)pMt);//将IMFMediaType表示的媒体类型转换为AM_MEDIA_TYPE结构形式pmt-Set(*pMt);pCFilter-pVideoType-FreeRepresentation(AM_MEDIA_TYPE_REPRESENTATION, pMt);//释放GetRepresentation分配的内存HasSet TRUE;return S_OK;}return S_FALSE;
}HRESULT CPin1::SetMediaType(const CMediaType *pmt)
{if (HasSet FALSE)//如果GetMediaType函数没有调用{GetMediaType(0, m_mt);//设置引脚媒体类型return S_OK;}return CBasePin::SetMediaType(pmt);
}HRESULT CPin1::BreakConnect()
{HasSet FALSE;return CBasePin::BreakConnect();
}HRESULT CPin1::DecideBufferSize(IMemAllocator *pMemAllocator, ALLOCATOR_PROPERTIES * ppropInputRequest)//确定输出引脚样本缓冲区大小
{HRESULT hr S_OK;ppropInputRequest-cBuffers 1;//1个缓冲区ppropInputRequest-cbBuffer 10000000;//缓冲区的大小10MALLOCATOR_PROPERTIES Actual;hr pMemAllocator-SetProperties(ppropInputRequest, Actual);if (FAILED(hr))return hr;if (Actual.cbBuffer ppropInputRequest-cbBuffer)// 这个分配器是否不合适{return E_FAIL;}ASSERT(Actual.cBuffers 1);// 确保我们只有 1 个缓冲区return S_OK;
}
CPin2.cpp
#include DLL.hCPin2::CPin2(CFilter *pFilter, HRESULT *phr, LPCWSTR pPinName) : CBaseOutputPin(NAME(Audio), pFilter, pFilter, phr, pPinName)
{pCFilter pFilter;
}CPin2::~CPin2()
{}STDMETHODIMP CPin2::NonDelegatingQueryInterface(REFIID riid, void **ppv)
{if (riid IID_IMediaSeeking){return GetInterface(static_castIMediaSeeking*(this), ppv);}elsereturn CBaseOutputPin::NonDelegatingQueryInterface(riid, ppv);
}HRESULT CPin2::CheckMediaType(const CMediaType *pmt)
{AM_MEDIA_TYPE* pMt NULL;pCFilter-pAudioType-GetRepresentation(AM_MEDIA_TYPE_REPRESENTATION, (void**)pMt);//将IMFMediaType表示的媒体类型转换为AM_MEDIA_TYPE结构形式CMediaType MT(*pMt);if (pmt-MatchesPartial(MT)){pCFilter-pAudioType-FreeRepresentation(AM_MEDIA_TYPE_REPRESENTATION, pMt);//释放GetRepresentation分配的内存return S_OK;}pCFilter-pAudioType-FreeRepresentation(AM_MEDIA_TYPE_REPRESENTATION, pMt);//释放GetRepresentation分配的内存return S_FALSE;
}HRESULT CPin2::GetMediaType(int iPosition, CMediaType *pmt)
{if (pCFilter-m_pFileName NULL)return S_FALSE;if (iPosition 0){AM_MEDIA_TYPE* pMt NULL;pCFilter-pAudioType-GetRepresentation(AM_MEDIA_TYPE_REPRESENTATION, (void**)pMt);//将IMFMediaType表示的媒体类型转换为AM_MEDIA_TYPE结构形式pmt-Set(*pMt);pCFilter-pAudioType-FreeRepresentation(AM_MEDIA_TYPE_REPRESENTATION, pMt);//释放GetRepresentation分配的内存HasSet TRUE;return S_OK;}return S_FALSE;
}HRESULT CPin2::SetMediaType(const CMediaType *pmt)
{if (HasSet FALSE)//如果GetMediaType函数没有调用{GetMediaType(0, m_mt);//设置引脚媒体类型return S_OK;}return CBasePin::SetMediaType(pmt);
}HRESULT CPin2::BreakConnect()
{HasSet FALSE;return CBasePin::BreakConnect();
}HRESULT CPin2::DecideBufferSize(IMemAllocator *pMemAllocator, ALLOCATOR_PROPERTIES * ppropInputRequest)//确定输出引脚样本缓冲区大小
{HRESULT hr S_OK;ppropInputRequest-cBuffers 1;//1个缓冲区ppropInputRequest-cbBuffer 1000000;//缓冲区的大小1MALLOCATOR_PROPERTIES Actual;hr pMemAllocator-SetProperties(ppropInputRequest, Actual);if (FAILED(hr))return hr;if (Actual.cbBuffer ppropInputRequest-cbBuffer)// 这个分配器是否不合适{return E_FAIL;}ASSERT(Actual.cBuffers 1);// 确保我们只有 1 个缓冲区return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::CheckCapabilities(DWORD *pCapabilities)//查询流是否具有指定的Seek功能
{CheckPointer(pCapabilities, E_POINTER);return (~m_dwSeekingCaps *pCapabilities) ? S_FALSE : S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::ConvertTimeFormat(LONGLONG *pTarget, const GUID *pTargetFormat, LONGLONG Source, const GUID *pSourceFormat)//从一种时间格式转换为另一种时间格式
{CheckPointer(pTarget, E_POINTER);if (pTargetFormat 0 || *pTargetFormat TIME_FORMAT_MEDIA_TIME){if (pSourceFormat 0 || *pSourceFormat TIME_FORMAT_MEDIA_TIME){*pTarget Source;return S_OK;}}return E_INVALIDARG;
}HRESULT STDMETHODCALLTYPE CPin2::GetAvailable(LONGLONG *pEarliest, LONGLONG *pLatest)//获取有效Seek的时间范围
{if (pEarliest){*pEarliest 0;}if (pLatest){CAutoLock lock(m_pLock);*pLatest pCFilter-DUR;}return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetCapabilities(DWORD *pCapabilities)//检索流的所有Seek功能
{CheckPointer(pCapabilities, E_POINTER);*pCapabilities m_dwSeekingCaps;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetCurrentPosition(LONGLONG *pCurrent)//获取相对于流总持续时间的当前位置
{*pCurrent pCFilter-CUR;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetDuration(LONGLONG *pDuration)//获取流的持续时间
{CheckPointer(pDuration, E_POINTER);CAutoLock lock(m_pLock);*pDuration pCFilter-DUR;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetPositions(LONGLONG *pCurrent, LONGLONG *pStop)//获取相对于流总持续时间的当前位置和停止位置
{CheckPointer(pCurrent, E_POINTER); CheckPointer(pStop, E_POINTER);*pCurrent pCFilter-CUR; *pStop pCFilter-DUR;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetPreroll(LONGLONG *pllPreroll)//获取将在开始位置之前排队的数据量
{CheckPointer(pllPreroll, E_POINTER);*pllPreroll 0;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetRate(double *pdRate)//获取播放速率
{CheckPointer(pdRate, E_POINTER);CAutoLock lock(m_pLock);*pdRate 1.0;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetStopPosition(LONGLONG *pStop)//获取相对于流的持续时间的停止播放时间
{CheckPointer(pStop, E_POINTER);CAutoLock lock(m_pLock);*pStop pCFilter-DUR;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::GetTimeFormat(GUID *pFormat)//获取当前用于Seek操作的时间格式
{CheckPointer(pFormat, E_POINTER);*pFormat TIME_FORMAT_MEDIA_TIME;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::IsFormatSupported(const GUID *pFormat)//确定Seek操作是否支持指定的时间格式
{CheckPointer(pFormat, E_POINTER);return *pFormat TIME_FORMAT_MEDIA_TIME ? S_OK : S_FALSE;
}HRESULT STDMETHODCALLTYPE CPin2::IsUsingTimeFormat(const GUID *pFormat)//确定Seek操作当前是否使用指定的时间格式
{CheckPointer(pFormat, E_POINTER);return *pFormat TIME_FORMAT_MEDIA_TIME ? S_OK : S_FALSE;
}HRESULT STDMETHODCALLTYPE CPin2::QueryPreferredFormat(GUID *pFormat)//获取首选的Seek时间格式
{CheckPointer(pFormat, E_POINTER);*pFormat TIME_FORMAT_MEDIA_TIME;return S_OK;
}HRESULT STDMETHODCALLTYPE CPin2::SetPositions(LONGLONG *pCurrent, DWORD dwCurrentFlags, LONGLONG *pStop, DWORD dwStopFlags)//设置当前位置和停止位置
{CheckPointer(pCurrent, E_POINTER);DWORD dwCurrentPos dwCurrentFlags AM_SEEKING_PositioningBitsMask;if (dwCurrentPos AM_SEEKING_AbsolutePositioning *pCurrent 0 *pCurrent pCFilter-DUR){HRESULT hr;FILTER_STATE fs;hr pCFilter-GetState(0, fs);if (fs ! State_Stopped *pCurrent *pCurrentpCFilter-DUR - 10000000){hr pCFilter-pIMFMediaSource-Pause();//暂停媒体源hr pCFilter-pCPin1-DeliverBeginFlush();hr pCFilter-pCPin2-DeliverBeginFlush();Sleep(200);//确保下游解码器丢弃所有样本如果下游解码器残留有样本渲染器会等待其渲染时间时间戳视频将卡在这里hr pCFilter-pCPin1-DeliverEndFlush();hr pCFilter-pCPin2-DeliverEndFlush();hr pCFilter-pCPin1-DeliverNewSegment(0, pCFilter-DUR - pCFilter-mStart, 1.0);hr pCFilter-pCPin2-DeliverNewSegment(0, pCFilter-DUR - pCFilter-mStart, 1.0);pCFilter-mStart *pCurrent;PROPVARIANT var;PropVariantInit(var);var.vt VT_I8;var.hVal.QuadPart pCFilter-mStart;hr pCFilter-pIMFMediaSource-Start(pCFilter-pISourceD, NULL, var);//启动媒体源PropVariantClear(var);return S_OK;}}return E_INVALIDARG;
}HRESULT STDMETHODCALLTYPE CPin2::SetRate(double dRate)//设置播放速率
{if (dRate 1.0)return S_OK;else return S_FALSE;
}HRESULT STDMETHODCALLTYPE CPin2::SetTimeFormat(const GUID *pFormat)//设置后续Seek操作的时间格式
{CheckPointer(pFormat, E_POINTER);return *pFormat TIME_FORMAT_MEDIA_TIME ? S_OK : E_INVALIDARG;
}
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