Audio流程分析

 平台是MT8666的android 9.0系统

Audio相关so库的结构：

audioserver(main_audioserver.cpp)-->audioflinger(libaudioflinger.so)->(libaudiohal ,libaudioprocessing ,libaudiospdif ,libaudioutils,libaudioclient ,libserviceutility )
                                 -->audiopolicy(libaudiopolicyservice.so)->(libserviceutility.so, libaudiopolicymanager.so, libaudioclient.so)
                                 -->oboeservice(libaaudioservice.so)->(libaaudio ,libaudioflinger ,libaudioclient )
                                 -->soundtrigger(libsoundtriggerservice.so)->(libsoundtrigger, libaudioclient,libaudiohal ,libaudiohal_deathhandler, android.hardware.soundtrigger@2.0 ,android.hardware.soundtrigger@2.1 )

SDK: