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Windows Media DRM or WMDRM, is a digital rights management service for the Windows Media platform. It is designed to provide delivery of audio or video content over an IP network to a PC or other playback device in such a way that the distributor can control how that content is used. WMDRM includes the following components:
The Protected Media Path is a set of technologies creating a "Protected Environment," first included in Microsoft's Windows Vista operating system, that is used to enforce digital rights management (DRM) protections on content. Its subsets are Protected Video Path (PVP) and Protected User Mode Audio (PUMA).
The first version of the UMDF was shipped as part of Windows Media Player version 10 on 2004-10-12. Code-named "Crescent", it was designed to support the Media Transfer Protocol driver, and no public interfaces or documentation were provided for it. Later, Microsoft decided to turn UMDF into a device driver development platform.
Network device drivers for Windows XP use NDIS 5.x and may work with subsequent Windows operating systems, but for performance reasons network device drivers should implement NDIS 6.0 or higher. [8] Similarly, WDDM is the driver model for Windows Vista and up, which replaces XPDM used in graphics drivers.
Windows Media Player 12 was released with Windows 7. It included support for more media formats and added new features. With Windows 8, however, the player did not receive an upgrade. On April 16, 2012, Microsoft announced that Windows Media Player would not be included in Windows RT, the line of Windows designed to run on ARM-based devices. [16]
But some sound card drivers can emulate more than one MME device (or support more than a single streaming client) so it could work with MME too. Starting from Windows 2000, MME supports playback device sharing (multi-client access) and can mix playback streams together. Starting from Windows XP, MME started to support recording device sharing.
To ensure DirectMusic functions such as Microsoft GS Wavetable SW Synth work correctly, a WDM sound driver is recommended in Windows 98 or Windows Me. On Microsoft Windows Vista, DirectMusic uses only software synthesis. Also, the DirectMusic kernel mode synthesizer that supplies the DirectMusic components with a high-resolution timer has been ...
This differs markedly from the Windows Driver Model (WDM) which requires driver developers to be fully familiar with many complex technical details to write a basic driver. Part of the key to achieving conceptual scalability is that KMDF and UMDF use an "opt-in" model.