Systrace
AudioTrack::start/stop，开始/停止播放，主要是： start、startOutput、start_output_stream stop、stopOutput、stop_output_stream pause、flush、release AudioTrack::start startOutput AudioTrack::stop stopOutp...
数据流：编解码 重采样 混音 过音效 AudioTrack::set、start、write Audioclient::prepareTracks_l、AudioFlinger::threadLoop 客户端 AudioTrack OpenSL ES AAudio MediaPlayer audioserver audiohal
native crash - audioserver crash
Android.bp syntax and usecase
