acquireAudioSessionId()
IAudioFlinger.cpp
AudioFlinger.cpp
unPin()
IServiceManager.cpp
get_audio_flinger()
AudioSystem.cpp
purgeStaleEffects_l()
IPCThreadState.cpp
MediaPlayer
releaseAudioSessionId()
参数：“media.audio_flinger”
getService()
MediaPlayer.java
MediaPlayer.cpp
android_media_MediaPlayer.java
pid_t
removeEffect_l()
getCallingPid()
checkSuspendOnEffectEnabled_l()
Threads.cpp
defaultServiceManager()
AudioSystem::unregisterEffect()
sendConfigEvent_l()
AudioFlingerClient.cpp
getMediaPlayer()
registerClient()
setAudioSessionId()
purgeHandles()
IAudioFlinger
NotificationClient()
sendIoConfigEvent_l()
Effects.cpp
Effects.h
setAudioSessionId
android_media_MediaPlayer_set_audio_session_id()
new AudioFlingerClient()
IServiceManager
sendIoConfigEvent()
