├── .gitignore ├── README.md └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | 4 | # User-specific files 5 | *.suo 6 | *.user 7 | *.sln.docstates 8 | 9 | # Build results 10 | 11 | [Dd]ebug/ 12 | [Rr]elease/ 13 | x64/ 14 | build/ 15 | [Bb]in/ 16 | [Oo]bj/ 17 | 18 | # Enable "build/" folder in the NuGet Packages folder since NuGet packages use it for MSBuild targets 19 | !packages/*/build/ 20 | 21 | # MSTest test Results 22 | [Tt]est[Rr]esult*/ 23 | [Bb]uild[Ll]og.* 24 | 25 | *_i.c 26 | *_p.c 27 | *.ilk 28 | *.meta 29 | *.obj 30 | *.pch 31 | *.pdb 32 | *.pgc 33 | *.pgd 34 | *.rsp 35 | *.sbr 36 | *.tlb 37 | *.tli 38 | *.tlh 39 | *.tmp 40 | *.tmp_proj 41 | *.log 42 | *.vspscc 43 | *.vssscc 44 | .builds 45 | *.pidb 46 | *.log 47 | *.scc 48 | 49 | # Visual C++ cache files 50 | ipch/ 51 | *.aps 52 | *.ncb 53 | *.opensdf 54 | *.sdf 55 | *.cachefile 56 | 57 | # Visual Studio profiler 58 | *.psess 59 | *.vsp 60 | *.vspx 61 | 62 | # Guidance Automation Toolkit 63 | *.gpState 64 | 65 | # ReSharper is a .NET coding add-in 66 | _ReSharper*/ 67 | *.[Rr]e[Ss]harper 68 | 69 | # TeamCity is a build add-in 70 | _TeamCity* 71 | 72 | # DotCover is a Code Coverage Tool 73 | *.dotCover 74 | 75 | # NCrunch 76 | *.ncrunch* 77 | .*crunch*.local.xml 78 | 79 | # Installshield output folder 80 | [Ee]xpress/ 81 | 82 | # DocProject is a documentation generator add-in 83 | DocProject/buildhelp/ 84 | DocProject/Help/*.HxT 85 | DocProject/Help/*.HxC 86 | DocProject/Help/*.hhc 87 | DocProject/Help/*.hhk 88 | DocProject/Help/*.hhp 89 | DocProject/Help/Html2 90 | DocProject/Help/html 91 | 92 | # Click-Once directory 93 | publish/ 94 | 95 | # Publish Web Output 96 | *.Publish.xml 97 | *.pubxml 98 | 99 | # NuGet Packages Directory 100 | ## TODO: If you have NuGet Package Restore enabled, uncomment the next line 101 | #packages/ 102 | 103 | # Windows Azure Build Output 104 | csx 105 | *.build.csdef 106 | 107 | # Windows Store app package directory 108 | AppPackages/ 109 | 110 | # Others 111 | sql/ 112 | *.Cache 113 | ClientBin/ 114 | [Ss]tyle[Cc]op.* 115 | ~$* 116 | *~ 117 | *.dbmdl 118 | *.[Pp]ublish.xml 119 | *.pfx 120 | *.publishsettings 121 | 122 | # RIA/Silverlight projects 123 | Generated_Code/ 124 | 125 | # Backup & report files from converting an old project file to a newer 126 | # Visual Studio version. Backup files are not needed, because we have git ;-) 127 | _UpgradeReport_Files/ 128 | Backup*/ 129 | UpgradeLog*.XML 130 | UpgradeLog*.htm 131 | 132 | # SQL Server files 133 | App_Data/*.mdf 134 | App_Data/*.ldf 135 | 136 | # ========================= 137 | # Windows detritus 138 | # ========================= 139 | 140 | # Windows image file caches 141 | Thumbs.db 142 | ehthumbs.db 143 | 144 | # Folder config file 145 | Desktop.ini 146 | 147 | # Recycle Bin used on file shares 148 | $RECYCLE.BIN/ 149 | 150 | # Mac crap 151 | .DS_Store 152 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # media-foundation-samples 2 | 3 | Sample implementations of different Microsoft Media Foundation components 4 | 5 | ## References 6 | 7 | * Anton Polinger, Developing Microsoft Media Foundation Applications, ISBN: 978-0-7356-5659-8 8 | * MSDN, Media Foundation Architecture, [http://msdn.microsoft.com/en-us/library/windows/desktop/ms696219(v=vs.85).aspx](http://msdn.microsoft.com/en-us/library/windows/desktop/ms696219(v=vs.85\).aspx) 9 | * MSDN, Windows 8.1 Media extension sample, [http://code.msdn.microsoft.com/windowsapps/media-extensions-sample-7b466096](http://code.msdn.microsoft.com/windowsapps/media-extensions-sample-7b466096) 10 | * tenouk.com, DLLs and linking, [http://www.tenouk.com/ModuleBB.html](http://www.tenouk.com/ModuleBB.html) 11 | * MSDN, Windows Runtime C++ Template Library (WRL), [http://msdn.microsoft.com/en-us/library/vstudio/hh438466.aspx](http://msdn.microsoft.com/en-us/library/vstudio/hh438466.aspx) 12 | * MSDN, Walkthrough: Creating a Windows Store app using WRL and Media Foundation, [http://msdn.microsoft.com/en-us/library/jj872764.aspx](http://msdn.microsoft.com/en-us/library/jj872764.aspx) 13 | 14 | ## Core MF concepts 15 | 16 | An architectural overview of the Media Foundation Architecture: 17 | 18 | ![Media Foundation Architecture](http://i.msdn.microsoft.com/dynimg/IC500890.png "Media Foundation Architecture") 19 | 20 | Two different programming models: 21 | 22 | * __Media pipeline__ - Contains Media Source, MFT and Media Sink objects. Any object can be implemented by the application. 23 | 1. [http://msdn.microsoft.com/en-us/library/windows/desktop/ms703912(v=vs.85).aspx](http://msdn.microsoft.com/en-us/library/windows/desktop/ms703912(v=vs.85\).aspx) 24 | * __Source reader & Sink writer__ 25 | 1. [http://msdn.microsoft.com/en-us/library/windows/desktop/dd940436(v=vs.85).aspx](http://msdn.microsoft.com/en-us/library/windows/desktop/dd940436(v=vs.85\).aspx) 26 | 2. [http://msdn.microsoft.com/en-us/library/windows/desktop/ff819461(v=vs.85).aspx](http://msdn.microsoft.com/en-us/library/windows/desktop/ff819461(v=vs.85\).aspx) 27 | 28 | ## Examples 29 | 30 | See github projects: 31 | 32 | ``` 33 | https://github.com/joekickass/media-foundation-samples 34 | ``` 35 | 36 | ## Plumbing 37 | 38 | As usual when it comes to creating components that should fit into a complex framework (e.g. __MF__) there are some plumbing involved. With plumbing I mean all the bulk code that has to be written to hande the packaging of the component as well as to fulfill interfaces that allows the component to be loaded by the framework. In the case of _MF_ , below is a short list: 39 | 40 | * WRL 41 | * DLLs, linking and exporting 42 | * MIDL and MIDLRT 43 | 44 | ### Windows Runtime Template Language (WRL) 45 | 46 | In most situations, it is recommended to use C++/CX to interact with the Windows Runtime. But in the case of hybrid components that implement both COM and Windows Runtime interfaces, such as Media Foundation objects, this is not possible. C++/CX can only create Windows Runtime objects. So, for hybrid objects it is recommended that you use WRL to interact with the Windows Runtime. Be aware that Windows Runtime C++ Template Library has limited support for implementing COM interfaces. 47 | 48 | * [http://msdn.microsoft.com/en-us/library/vstudio/hh438466.aspx](http://msdn.microsoft.com/en-us/library/vstudio/hh438466.aspx) 49 | * [http://channel9.msdn.com/Events/Windows-Camp/Developing-Windows-8-Metro-style-apps-in-Cpp/The-Windows-Runtime-Library-WRL-](http://channel9.msdn.com/Events/Windows-Camp/Developing-Windows-8-Metro-style-apps-in-Cpp/The-Windows-Runtime-Library-WRL-) 50 | 51 | ### DLLs, linking and exporting 52 | 53 | An MF extension is usually implemented as a DLL. The following few steps are a common procedure: 54 | 55 | 1. Create a Win (Phone) 8.x DLL project 56 | 57 | 2. Add a definition file (*.def) that defines all exported functions of the shared library (the export list) 58 | 59 | __*.def:__ 60 | ``` 61 | EXPORTS 62 | DllGetActivationFactory PRIVATE 63 | DllCanUnloadNow PRIVATE 64 | DllGetClassObject PRIVATE 65 | ``` 66 | 67 | __Note:__ The *.def file needs to be referenced in project settings under: 68 | 69 | | Setting | Value | 70 | | ---------------------------------- | -------------------- | 71 | | Linker -> Input -> Definition File | mydefinitionfile.def | 72 | 73 | 3. _dllmain.cpp_ defines the entry point of the DLL; `DllMain()`. Let it also implement the exported functions using some _WRL_ magic: 74 | 75 | __dllmain.cpp:__ 76 | ```cpp 77 | #include "pch.h" // pch.h should include 78 | 79 | using namespace Microsoft::WRL; 80 | 81 | BOOL APIENTRY DllMain(HMODULE hInstance, DWORD ul_reason_for_call, LPVOID) 82 | { 83 | switch (ul_reason_for_call) 84 | { 85 | case DLL_PROCESS_ATTACH: 86 | DisableThreadLibraryCalls(hInstance); 87 | break; 88 | case DLL_THREAD_ATTACH: 89 | case DLL_THREAD_DETACH: 90 | case DLL_PROCESS_DETACH: 91 | break; 92 | } 93 | return TRUE; 94 | } 95 | 96 | HRESULT WINAPI DllGetActivationFactory(HSTRING activatibleClassId, IActivationFactory** factory) 97 | { 98 | return Module::GetModule().GetActivationFactory(activatibleClassId, factory); 99 | } 100 | 101 | HRESULT WINAPI DllCanUnloadNow() 102 | { 103 | return Module::GetModule().Terminate() ? S_OK : S_FALSE; 104 | } 105 | 106 | STDAPI DllGetClassObject(REFCLSID rclsid, REFIID riid, LPVOID FAR* ppv) 107 | { 108 | return Module::GetModule().GetClassObject(rclsid, riid, ppv); 109 | } 110 | ``` 111 | 112 | More info on DLLs and linking can be found on [http://www.tenouk.com/ModuleBB.html](http://www.tenouk.com/ModuleBB.html) 113 | 114 | ### MIDL and MIDLRT 115 | 116 | The _Microsoft Interface Description Language_ is used to describe the interface exposed through the windows runtime. The following MSDN project template summarizes the steps needed to do this: 117 | 118 | [http://msdn.microsoft.com/en-us/library/vstudio/hh973463.aspx](http://msdn.microsoft.com/en-us/library/vstudio/hh973463.aspx) 119 | 120 | 1. An _.idl_ file that declares the MIDL attributes for a basic interface and its class implementation 121 | 2. A _.cpp_ file that defines the class implementation. 122 | 3. A file that defines the library exports `DllMain()`, `DllCanUnloadNow()`, `DllGetActivationFactory()`, and `DllGetClassObject()`. 123 | 124 | In addition to this, the __MIDLRT__ compiler needs to be set up to generate a _.winmd_ file for the DLL. Without it the library won't be exposed throught the Windows Runtime and thus cannot be used as a reference in managed code. More info: 125 | 126 | [http://msdn.microsoft.com/en-us/library/windows/desktop/hh869900(v=vs.85).aspx](http://msdn.microsoft.com/en-us/library/windows/desktop/hh869900(v=vs.85\).aspx) 127 | 128 | An example __*.idl__ file for a custom _MFT_: 129 | 130 | ```cpp 131 | import "Windows.Media.idl"; 132 | 133 | #include 134 | 135 | namespace Transform 136 | { 137 | [version(NTDDI_WIN8)] 138 | runtimeclass Effect 139 | { 140 | [default] interface Windows.Media.IMediaExtension; 141 | } 142 | } 143 | ``` 144 | 145 | Right clicking on the _idl_ file and selecting _Properties_ is a shortcut to the project properties for _MIDL_. To genereate a _.winmd_ file, add the following settings. 146 | 147 | | Setting | Value | 148 | | ----------------------------------------- | ------------------------------- | 149 | | MIDL -> General -> Enable Windows Runtime | Yes (/winrt) | 150 | | MIDL -> Output -> Metadata File | $(OutDir)%(RootNamespace).winmd | 151 | | MIDL -> Output -> Header File | %(RootNamespace)_h.h | 152 | 153 | Note that the generated _.winmd_ file needs to be modified in order to work properly. See _StackOverflow_ for more info: 154 | 155 | [http://stackoverflow.com/questions/14653250/how-to-declare-interface-that-inherits-from-iclosable-idisposable](http://stackoverflow.com/questions/14653250/how-to-declare-interface-that-inherits-from-iclosable-idisposable) 156 | 157 | This means adding the following build step under project settings: 158 | 159 | | Setting | Value | 160 | | --------------------------------------------- | ------------------------------- | 161 | | Custom Build Step -> General -> Command Line | mdmerge -v -i "$(OutDir)." -o "$(OutDir)Output" -partial -metadata_dir "$(WindowsSDK_MetadataPath)" && copy /y "$(OutDir)Output\*" "$(OutDir)" 162 | | Custom Build Step -> General -> Output | $(OutDir)%(RootNamespace).winmd | 163 | | Custom Build Step -> General -> Execute After | Midl | 164 | 165 | Finally, the generated header file (__%(RootNamespace)_h.h__) needs to be referenced in the class definition file (_*.cpp_) as shown in the generic example below. Notice the __InspectableClass__ using a string definition from the header, and the __ActivatableClass__ section. 166 | 167 | ```cpp 168 | #include "pch.h" 169 | 170 | #include "RootNamespace_h.h" 171 | #include 172 | 173 | using namespace Microsoft::WRL; 174 | using namespace Windows::Foundation; 175 | 176 | namespace ABI 177 | { 178 | namespace RootNamespace 179 | { 180 | class WinRTClass: public RuntimeClass 181 | { 182 | InspectableClass(RuntimeClass_RootNamespace_ClassName, BaseTrust) 183 | 184 | public: 185 | WinRTClass(){} 186 | }; 187 | 188 | ActivatableClass(WinRTClass); 189 | } 190 | } 191 | ``` 192 | 193 | ## MFTs 194 | 195 | A few libraries need to be referenced when creating an Effect MFT: 196 | 197 | * mf.lib 198 | * mfuuid.lib 199 | * mfplat.lib 200 | 201 | Add them to _Linker -> Input -> Additional Dependencies_. 202 | 203 | In managed code (e.g. the C# application where the MFT library is referenced), the class needs to be activated using the following section added to the _Package.appxmanifest_ file: 204 | 205 | ```Xml 206 | 207 | 208 | 209 | EffectTransform.dll 210 | 211 | 212 | 213 | 214 | ``` 215 | 216 | ## Threading 217 | 218 | MF is a free-threaded system, which means that COM interface methods can be invoked from arbitrary threads. Therefore, when calling CoInitializeEx(), you must initialize COM with the apartment-threaded object concurrency by passing in the COINIT_APARTMENTTHREADED parameter. Your objects might also need to use synchronization primitives, such as locks, to control access to internal variables by concurrently running threads. 219 | 220 | See also [http://msdn.microsoft.com/en-us/library/windows/desktop/ee892371(v=vs.85).aspx](http://msdn.microsoft.com/en-us/library/windows/desktop/ee892371(v=vs.85\).aspx) 221 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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