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请问Streams.h是什么头文件？主要用在什么领域，哪里可以下载呀？
找到了，最新 ms sdk有！
//------------------------------------------------------------------------------
// File: Streams.h
//
// Desc: DirectShow base classes - defines overall streams architecture.
//
// Copyright (c) 1992-2001 Microsoft Corporation. All rights reserved.
//------------------------------------------------------------------------------
#ifndef __STREAMS__
#define __STREAMS__
// disable some level-4 warnings, use #pragma warning(enable:###) to re-enable
#pragma warning(disable:4100) // warning C4100: unreferenced formal parameter
#pragma warning(disable:4127) // warning C4127: conditional expression is constant
#pragma warning(disable:4189) // warning C4189: local variable is initialized but not referenced
#pragma warning(disable:4201) // warning C4201: nonstandard extension used : nameless struct/union
#pragma warning(disable:4511) // warning C4511: copy constructor could not be generated
#pragma warning(disable:4512) // warning C4512: assignment operator could not be generated
#pragma warning(disable:4514) // warning C4514: unreferenced inline function has been removed
#pragma warning(disable:4710) // warning C4710: function not inlined
#ifdef _MSC_VER
#if _MSC_VER>=1100
#define AM_NOVTABLE __declspec(novtable)
#else
#define AM_NOVTABLE
#endif
#endif // MSC_VER
#include <windows.h>
#include <windowsx.h>
#include <olectl.h>
#include <ddraw.h>
#include <mmsystem.h>
#ifndef NUMELMS
#define NUMELMS(aa) (sizeof(aa)/sizeof((aa)[0]))
#endif
///////////////////////////////////////////////////////////////////////////
// The following definitions come from the Platform SDK and are required if
// the applicaiton is being compiled with the headers from Visual C++ 6.0.
///////////////////////////////////////////////////////////////////////////
#ifndef InterlockedExchangePointer
#define InterlockedExchangePointer(Target, Value) \
(PVOID)InterlockedExchange((PLONG)(Target), (LONG)(Value))
#endif
#ifndef _WAVEFORMATEXTENSIBLE_
#define _WAVEFORMATEXTENSIBLE_
typedef struct {
WAVEFORMATEX Format;
union {
WORD wValidBitsPerSample; /* bits of precision */
WORD wSamplesPerBlock; /* valid if wBitsPerSample==0 */
WORD wReserved; /* If neither applies, set to zero. */
} Samples;
DWORD dwChannelMask; /* which channels are */
/* present in stream */
GUID SubFormat;
} WAVEFORMATEXTENSIBLE, *PWAVEFORMATEXTENSIBLE;
#endif // !_WAVEFORMATEXTENSIBLE_
#if !defined(WAVE_FORMAT_EXTENSIBLE)
#define WAVE_FORMAT_EXTENSIBLE 0xFFFE
#endif // !defined(WAVE_FORMAT_EXTENSIBLE)
#ifndef GetWindowLongPtr
#define GetWindowLongPtrA GetWindowLongA
#define GetWindowLongPtrW GetWindowLongW
#ifdef UNICODE
#define GetWindowLongPtr GetWindowLongPtrW
#else
#define GetWindowLongPtr GetWindowLongPtrA
#endif // !UNICODE
#endif // !GetWindowLongPtr
#ifndef SetWindowLongPtr
#define SetWindowLongPtrA SetWindowLongA
#define SetWindowLongPtrW SetWindowLongW
#ifdef UNICODE
#define SetWindowLongPtr SetWindowLongPtrW
#else
#define SetWindowLongPtr SetWindowLongPtrA
#endif // !UNICODE
#endif // !SetWindowLongPtr
#ifndef GWLP_WNDPROC
#define GWLP_WNDPROC (-4)
#endif
#ifndef GWLP_HINSTANCE
#define GWLP_HINSTANCE (-6)
#endif
#ifndef GWLP_HWNDPARENT
#define GWLP_HWNDPARENT (-8)
#endif
#ifndef GWLP_USERDATA
#define GWLP_USERDATA (-21)
#endif
#ifndef GWLP_ID
#define GWLP_ID (-12)
#endif
#ifndef DWLP_MSGRESULT
#define DWLP_MSGRESULT 0
#endif
#ifndef DWLP_DLGPROC
#define DWLP_DLGPROC DWLP_MSGRESULT + sizeof(LRESULT)
#endif
#ifndef DWLP_USER
#define DWLP_USER DWLP_DLGPROC + sizeof(DLGPROC)
#endif
///////////////////////////////////////////////////////////////////////////
// End Platform SDK definitions
///////////////////////////////////////////////////////////////////////////
#pragma warning(disable:4201) // warning C4201: nonstandard extension used : nameless struct/union
#include <strmif.h> // Generated IDL header file for streams interfaces
#include <reftime.h> // Helper class for REFERENCE_TIME management
#include <wxdebug.h> // Debug support for logging and ASSERTs
#include <amvideo.h> // ActiveMovie video interfaces and definitions
//include amaudio.h explicitly if you need it. it requires the DX SDK.
//#include <amaudio.h> // ActiveMovie audio interfaces and definitions
#include <wxutil.h> // General helper classes for threads etc
#include <combase.h> // Base COM classes to support IUnknown
#include <dllsetup.h> // Filter registration support functions
#include <measure.h> // Performance measurement
#include <comlite.h> // Light weight com function prototypes
#include <cache.h> // Simple cache container class
#include <wxlist.h> // Non MFC generic list class
#include <msgthrd.h> // CMsgThread
#include <mtype.h> // Helper class for managing media types
#include <fourcc.h> // conversions between FOURCCs and GUIDs
#include <control.h> // generated from control.odl
#include <ctlutil.h> // control interface utility classes
#include <evcode.h> // event code definitions
#include <amfilter.h> // Main streams architecture class hierachy
#include <transfrm.h> // Generic transform filter
#include <transip.h> // Generic transform-in-place filter
#include <uuids.h> // declaration of type GUIDs and well-known clsids
#include <source.h> // Generic source filter
#include <outputq.h> // Output pin queueing
#include <errors.h> // HRESULT status and error definitions
#include <renbase.h> // Base class for writing ActiveX renderers
#include <winutil.h> // Helps with filters that manage windows
#include <winctrl.h> // Implements the IVideoWindow interface
#include <videoctl.h> // Specifically video related classes
#include <refclock.h> // Base clock class
#include <sysclock.h> // System clock
#include <pstream.h> // IPersistStream helper class
#include <vtrans.h> // Video Transform Filter base class
#include <amextra.h>
#include <cprop.h> // Base property page class
#include <strmctl.h> // IAMStreamControl support
#include <edevdefs.h> // External device control interface defines
#include <audevcod.h> // audio filter device error event codes
#else
#ifdef DEBUG
#pragma message("STREAMS.H included TWICE")
#endif
#endif // __STREAMS__
定义 了流格式文件
