AudioEffect_3_enable_or_disable

这里的ops是在初始化的时候指向了对应的preproc_ops_t

start_lstop_l

Effect Module

setEnabled_l

threadLoop

setEnabled_l函数关键的地方是更新了mState

in-stream.common.add_audio_effectin-stream.common.remove_audio_effect

process_l

mEffects[i]-updateState()

Audio Hal

Effect_SetState

effectChains[i]-process_l();

android_media_AudioEffect_native_setEnabled

AudioEffect.java

addAudioEffectremoveAudioEffect

EffectChain

EffectModule

PreProcessing.cpp

mIEffect-enable()mIEffect-disable()

setEnabled(state)

根据mState的不同状态调用start_l或者stop_l

audio_hw_hal.cpp

case PREPROC_EFFECT_STATE_CONFIG:   switch (effect->state)   case PREPROC_EFFECT_STATE_ACTIVE:       effect->ops->disable(effect)       case PREPROC_EFFECT_STATE_ACTIVE:    switch (effect->state)    case PREPROC_EFFECT_STATE_CONFIG:        effect->ops->enable(effect);

setEnabled

AudioHalStreamIn

AudioFlinger::RecordThread

AudioEffect.cpp

AcousticEchoCanceler

android_media_AudioEffect