关键词: H 264, USWC, 硬解码, DXVA

Abstract:

HD video decoding and playing on the client player suffers high CPU occupancy and low image data copy speed. This paper proposes an approach that can copy data rapidly decoded by GPU. The DXVA hardware decoding method in the application of video decoding arithmetic process is studied. In order to eliminate the high CPU usage result from the memory copying, GPU memory’s specialty and new features of SSE41 multimedia instruction are used to design and implement a scheme of video frame data copy quickly. The experiment shows the method can effectively reduce CPU occupancy while meeting the requirements of real-time HD video playing.

Key words: H 264, USWC, hardware decoding, DXVA