axextend.idl

vc6.0完整版

	[in] int iProgress);		// a number between 0 and 100 (%)
}


//
// Capture graph builder that can deal with a single filter having more than
// one pin of each category... some new devices can capture both audio and
// video, for example
//

[
    object,
    uuid(93E5A4E0-2D50-11d2-ABFA-00A0C9C6E38D),
    pointer_default(unique)
]
interface ICaptureGraphBuilder2 : IUnknown {

    // Use this filtergraph
    HRESULT SetFiltergraph(
	[in] IGraphBuilder *pfg);

    // what filtergraph are you using?
    // *ppfg->Release() when you're done with it
    HRESULT GetFiltergraph(
	[out] IGraphBuilder **ppfg);

    // creates a rendering section in the filtergraph consisting of a MUX
    // of some filetype, and a file writer (and connects them together)
    // *ppf->Release() when you're done with it
    // *ppSink->Release() when you're done with it
    HRESULT SetOutputFileName(
	[in] const GUID *pType,		// GUID of MUX filter to use
	[in] LPCOLESTR lpstrFile,	// filename given to file writer
	[out] IBaseFilter **ppf,	// returns pointer to the MUX
        [out] IFileSinkFilter **ppSink);// queried from file writer

    // Looks for an interface on the filter and on the output pin of the given
    // category and type.  (Categories: CAPTURE/PREVIEW/VIDEOPORT/VBI etc. or
    // NULL for "don't care".  Type:  MAJORTYPE_Video/Audio etc or NULL)
    // !!! Will some filters have >1 capture pin?  ie RGB and MPEG?
    // It will also look upstream and downstream of
    // the pin for the interface, to find interfaces on renderers, MUXES, TV
    // Tuners, etc.
    // Call *ppint->Release() when you're done with it
    [local] HRESULT FindInterface(
	[in] const GUID *pCategory,	// can be NULL for all pins
	[in] const GUID *pType,		// Audio/Video/??? or NULL (don't care)
	[in] IBaseFilter *pf,
	[in] REFIID riid,
	[out] void **ppint);
    [call_as(FindInterface)] HRESULT RemoteFindInterface(
	[in] const GUID *pCategory,	// can be NULL for all pins
	[in] const GUID *pType,		// Audio/Video/??? or NULL (don't care)
	[in] IBaseFilter *pf,
	[in] REFIID riid,
	[out] IUnknown **ppint);

    // Connects the pin of the given category and type of the source filter to
    // the rendering filter, optionally through another filter (compressor?)
    // (Type is a Majortype, like Video or Audio)
    // For a non-NULL category, it will instantiate and connect additional
    // required filters upstream too, like TV Tuners and Crossbars.
    // If there is only one output pin on the source, use a NULL category
    // and type.  You can also have pSource be a pin
    HRESULT RenderStream(
	[in] const GUID *pCategory,	// can be NULL if only one output pin
	[in] const GUID *pType,		// Major type (Video/Audio/etc)
	[in] IUnknown *pSource,		// filter or pin
	[in] IBaseFilter *pfCompressor,
	[in] IBaseFilter *pfRenderer);	// can be NULL

    // Sends IAMStreamControl messages to the pin of the desired category,
    // (eg. "capture" or "preview") and of the desired type (eg. VIDEO or AUDIO)
    // A category MUST be given.  If a filter is given, a type must be too.
    // REFERENCE_TIME=NULL means NOW
    // REFERENCE_TIME=MAX_TIME means never, or cancel previous request
    // NULL controls all capture filters in the graph - you will get one
    //     notification for each filter with a pin of that category found
    // returns S_FALSE if stop will be signalled before last sample is
    //     rendered.
    // return a FAILURE code if the filter does not support IAMStreamControl
    HRESULT ControlStream(
	[in] const GUID *pCategory,
	[in] const GUID *pType,		// Major type (Video/Audio/etc)
	[in] IBaseFilter *pFilter,
	[in] REFERENCE_TIME *pstart,
	[in] REFERENCE_TIME *pstop,
	[in] WORD wStartCookie,		// high word reserved
	[in] WORD wStopCookie);		// high word reserved

    // creates a pre-allocated file of a given size in bytes
    HRESULT AllocCapFile(
	[in] LPCOLESTR lpstr,
	[in] DWORDLONG dwlSize);

    // Copies the valid file data out of the old, possibly huge old capture
    //   file into a shorter new file.
    // Return S_FALSE from your progress function to abort capture, S_OK to
    //   continue
    HRESULT CopyCaptureFile(
	[in] LPOLESTR lpwstrOld,
	[in] LPOLESTR lpwstrNew,
	[in] int fAllowEscAbort,	// pressing ESC will abort?
	[in] IAMCopyCaptureFileProgress *pCallback);	// implement this to
							// get progress
    // Helper fn to find a certain pin on a filter.
    HRESULT FindPin(
	[in] IUnknown *pSource,
	[in] PIN_DIRECTION pindir,	// input or output?
	[in] const GUID *pCategory,	// what category? (or NULL)
	[in] const GUID *pType,		// what Major type (or NULL)
	[in] BOOL fUnconnected,		// must it be unconnected?
	[in] int num,			// which pin matching this? (0 based)
	[out] IPin **ppPin);
}

enum _AM_RENSDEREXFLAGS {
    AM_RENDEREX_RENDERTOEXISTINGRENDERERS = 0x01 // Dont add any renderers
};

//
// IFilterGraph2
//
// New methods on for IFilterGraph and IGraphBuilder will have to go here.
//

[
    object,
    uuid(36b73882-c2c8-11cf-8b46-00805f6cef60),
    pointer_default(unique)
]
interface IFilterGraph2: IGraphBuilder {

    // Add a Moniker source moniker
    HRESULT AddSourceFilterForMoniker(
          [in] IMoniker *pMoniker,
          [in] IBindCtx *pCtx,
          [in, unique] LPCWSTR lpcwstrFilterName,
          [out] IBaseFilter **ppFilter
    );

    // Specify the type for a reconnect
    // This is better than Reconnect as sometime the parties to a
    // reconnection can't remember what type they'd agreed (!)
    HRESULT ReconnectEx
        ( [in] IPin * ppin,             // the pin to disconnect and reconnect
          [in, unique] const AM_MEDIA_TYPE *pmt // the type to reconnect with - can be NULL
        );

    // Render a pin without adding any new renderers
    HRESULT RenderEx( [in] IPin *pPinOut,         // Pin to render
                      [in] DWORD dwFlags,         // flags
                      [in, out] DWORD *pvContext   // Unused - set to NULL
                    );

#if 0
    // Method looks for a filter which supports the specified interface.  If such
    // a filter exists, an AddRef()'ed pointer to the requested interface is placed
    // in *ppInterface.
    //
    // *ppInterface will be NULL on return if such a filter could not be found, and
    // the method will return E_NOINTERFACE.
    //
    // pdwIndex is an internal index that is used for obtaining subsequent interfaces.
    // *pdwIndex should be initialized to zero.  It is set on return to a value that
    // allows the implementation of FindFilterInterface to search for further interfaces
    // if called again.  If no more such interfaces exist, the method will return E_NOINTERFACE.
    //
    // If pdwIndex is NULL, FindFilterInterface returns an interface only if there is just
    // a single filter in the graph that supports the interface.  Otherwise it returns
    // E_NOINTERFACE.
    //
    HRESULT FindFilterInterface( [in] REFIID iid, [out] void ** ppInterface, [in,out] LPDWORD pdwIndex );

    // Tries to obtain the interface from the filter graph itself.  If this fails,
    // it attempts to find the unique filter that supports the interface.
    // On failure the method will return E_NOINTERFACE.  On success, it returns
    // S_OK and an AddRef()'ed pointer to the requested interface in *ppInterface.
    //
    HRESULT FindInterface( [in] REFIID iid, [out] void ** ppInterface );

#endif
}

//
// StreamBuilder
// aka Graph building with constraints
// aka convergent graphs
// aka Closed captioning

[
    object,
    local,
    uuid(56a868bf-0ad4-11ce-b03a-0020af0ba770),
    pointer_default(unique)
]
interface IStreamBuilder : IUnknown {

    // Connect this output pin directly or indirectly, using transform filters
    // if necessary to thing(s) that will render it, within this graph
    // Move from Initial state to Rendered state.

    HRESULT Render
        ( [in] IPin * ppinOut,         // the output pin
          [in] IGraphBuilder * pGraph  // the graph
        );

    // Undo what you did in Render.  Return to Initial state.
    HRESULT Backout
        ( [in] IPin * ppinOut,         // the output pin
          [in] IGraphBuilder * pGraph  // the graph
        );
}


// async reader interface - supported by file source filters. Allows
// multiple overlapped reads from different positions


[
        object,
        uuid(56a868aa-0ad4-11ce-b03a-0020af0ba770),
        pointer_default(unique)
]
interface IAsyncReader : IUnknown
{
    // pass in your preferred allocator and your preferred properties.
    // method returns the actual allocator to be used. Call GetProperties
    // on returned allocator to learn alignment and prefix etc chosen.
    // this allocator will be not be committed and decommitted by
    // the async reader, only by the consumer.
    // Must call this before calling Request.
    HRESULT RequestAllocator(
                [in]  IMemAllocator* pPreferred,
                [in]  ALLOCATOR_PROPERTIES* pProps,
                [out] IMemAllocator ** ppActual);

    // queue a request for data.
    // media sample start and stop times contain the requested absolute
    // byte position (start inclusive, stop exclusive).
    // may fail if sample not obtained from agreed allocator.
    // may fail if start/stop position does not match agreed alignment.
    // samples allocated from source pin's allocator may fail
    // GetPointer until after returning from WaitForNext.
    // Stop position must be aligned - this means it may exceed duration.
    // on completion, stop position will be corrected to unaligned
    // actual data.
    HRESULT Request(
                [in] IMediaSample* pSample,
                [in] DWORD_PTR dwUser);	        // user context

    // block until the next sample is completed or the timeout occurs.
    // timeout (millisecs) may be 0 or INFINITE. Samples may not
    // be delivered in order. If there is a read error of any sort, a
    // notification will already have been sent by the source filter,
    // and HRESULT will be an error.
    // If ppSample is not null, then a Request completed with the result
    // code returned.
    HRESULT WaitForNext(
                [in]  DWORD dwTimeout,
                [out] IMediaSample** ppSample,  // completed sample
                [out] DWORD_PTR * pdwUser);		// user context

    // sync read of data. Sample passed in must have been acquired from
    // the agreed allocator. Start and stop position must be aligned.
    // equivalent to a Request/WaitForNext pair, but may avoid the
    // need for a thread on the source filter.
    HRESULT SyncReadAligned(
                [in] IMediaSample* pSample);


    // sync read. works in stopped state as well as run state.
    // need not be aligned. Will fail if read is beyond actual total
    // length.
    HRESULT SyncRead(
                [in]  LONGLONG llPosition,	// absolute file position
                [in]  LONG lLength,		// nr bytes required
                [out, size_is(lLength)]
		      BYTE* pBuffer);		// write data here

    // return total length of stream, and currently available length.
    // reads for beyond the available length but within the total length will
    // normally succeed but may block for a long period.
    HRESULT Length(
                [out] LONGLONG* pTotal,
                [out] LONGLONG* pAvailable);

    // cause all outstanding reads to return, possibly with a failure code
    //(VFW_E_TIMEOUT) indicating they were cancelled.
    // Between BeginFlush and EndFlush calls, Request calls will fail and
    // WaitForNext calls will always complete immediately.
    HRESULT BeginFlush(void);
    HRESULT EndFlush(void);
}


// interface provided by the filtergraph itself to let other objects
// (especially plug-in distributors, but also apps like graphedt) know
// when the graph has changed.
[
    object,
    uuid(56a868ab-0ad4-11ce-b03a-0020af0ba770),
    pointer_default(unique)
]
interface IGraphVersion : IUnknown
{
    // returns the current graph version number
    // this is incremented every time there is a change in the
    // set of filters in the graph or in their connections
    //
    // if this is changed since your last enumeration, then re-enumerate
    // the graph
    HRESULT QueryVersion(LONG* pVersion);
}




//
// interface describing an object that uses resources.
//
// implement if: you request resources using IResourceManager. You will
// need to pass your implementation of this pointer as an in param.
//
// use if: you are a resource manager who implements IResourceManager
[
    object,
    uuid(56a868ad-0ad4-11ce-b03a-0020af0ba770),
    pointer_default(unique)
]
interface IResourceConsumer : IUnknown
{
    // you may acquire the resource specified.
    // return values:
    //      S_OK    -- I have successfully acquired it
    //      S_FALSE -- I will acquire it and call NotifyAcquire afterwards
    //      VFW_S_NOT_NEEDED: I no longer need the resource
    //      FAILED(hr)-I tried to acquire it and failed.

    HRESULT
    AcquireResource(
        [in] LONG idResource);



    // Please release the resource.