OpenMax的基本框架

如上图所示，为OpenMax的软件调用流程，下面简要介绍各层的主要功能：

Multimediaframework：

UsesOMXILtoaccessvideohardware

OMXILvideodecoder/encodercomponents：

Wrapthefunctionalityofthecomponentrequiredinthetargetsystem

OMXILwrapperprovidesastandardinterfaceforthefunctiontobe

wrapped

SuitableforV4L2interface

Commondriverforencoderanddecoder;MSM-specificplug-infor

V4L2framework;instance,videoengine,bufferallocation,andclock/bus

management

kernel/drivers/media/platform/msm/vidc/

HFI：