长沙招聘

Maintain the video component of Windows7 graphic driver for Intel Cedar Trail platform. The driver is based on Windows Display Driver Mode(WDDM), current version is WDDM v1.1. The video component in WDDM is defined as DXVA (DirectX Video Acceleration 2.0) which has three major functions required to maintain.
1. Video Decoding Acceleration.
Cedar Trail Platform supports three formats hardware acceleration through DXVA2 interface MPEG2, H.264 and WMV/VC1.
The job is to maintain the dxva decoding interface of driver, most decoding is fully hardware acceleration, the driver is to send decoding command to hardware.
2. Video Post Processing
Cedar Trail Platform supports several YUV format, like NV12, convert to XRGB format.
The job is to maintain video post processing interface in driver.
3. Processing High-Definition Video
This is similar to second item- video post processing. It is another interface, called DXVA-HD, designed in WDDM to support high definition video playback.

All the DXVA interface is the user mode driver, besides them, the job also need to maintain related codes in Kernel mode driver that manager the hardware. Most of work is to provide support to different video players, like Windows Media Player. If the issue root causes to 3D component, then provide data to support 3D team to resolve it. If the issue root causes to common component, then resolve it.

Qualification
Solid C/C++ programming skill.
Some knowledge on windows kernel, like interrupt, IRQL, DPC.
kernel mode debugging skill in Windows.
Familiar with direct show and Microsoft media foundation
Base knowledge Direct 3D
Base knowledge on video encoding and decoding.
Base knowledge on video post processing
WDDM driver development is a big plus.

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