mstar android 怎么连接电脑,Android：Mstar平台 HDMI OUT 静音流程

一、framework层

1. APP调用 AudioManager 的 adjustStreamVolume() 接口实现在： frameworksbaseservicescorejavacomandroidserveraudioAudioService.java

在判断当前是系统静音操作时，调用 HdmiOutAudioMute Native接口：

if(isMuteAdjust) {

boolean state;if (direction ==AudioManager.ADJUST_TOGGLE_MUTE) {

state= !streamState.mIsMuted;

}else{

state= direction ==AudioManager.ADJUST_MUTE;

}if (streamTypeAlias ==AudioSystem.STREAM_MUSIC) {

setSystemAudioMute(state);/*lxl 20191206 add patch begin*/PowerManagerService.nativeSetHdmiOutAudioMute(state);/*lxl 20191130 add patch end*/}for (int stream = 0; stream < mStreamStates.length; stream++) {if (streamTypeAlias ==mStreamVolumeAlias[stream]) {if (!(readCameraSoundForced()&&(mStreamStates[stream].getStreamType()==AudioSystem.STREAM_SYSTEM_ENFORCED))) {

mStreamStates[stream].mute(state);

}

}

}

}

2. nativeSetHdmiOutAudioMute 接口声明在： frameworksbaseservicescorejavacomandroidserverpowerPowerManagerService.java

public static native boolean nativeSetHdmiOutAudioMute(boolean onOff);

二、Native层

1.frameworksbaseservicescorejnicom_android_server_power_PowerManagerService.cpp 中实现了 nativeSetHdmiOutAudioMute() 方法：

static jboolean nativeSetHdmiOutAudioMute(JNIEnv *env, jclass clazz, jboolean onOff){

std::lock_guard<:mutex> lock(gPowerHalMutex);if(getInputHal()) {

Return ret = gInputHal->setHdmiOutAudioMute(onOff);if (!ret.isOk()) {

ALOGE("Failed to SetHdmiOutAudioMute.");return false;

}returnret;

}

ALOGE("Failed to SetHdmiOutAudioMute input hal is null.");return false;

}

Native方法的声明和注册：

static const JNINativeMethod gPowerManagerServiceMethods[] ={/*name, signature, funcPtr*/......{"nativeSetHdmiOutAudioMute", "(Z)Z",

(void*) nativeSetHdmiOutAudioMute },......

}

int register_android_server_PowerManagerService(JNIEnv*env) {int res = jniRegisterNativeMethods(env, "com/android/server/power/PowerManagerService",

gPowerManagerServiceMethods, NELEM(gPowerManagerServiceMethods));

(void) res; //Faked use when LOG_NDEBUG.

LOG_FATAL_IF(res < 0, "Unable to register native methods.");//Callbacks

jclass clazz;

FIND_CLASS(clazz,"com/android/server/power/PowerManagerService");

GET_METHOD_ID(gPowerManagerServiceClassInfo.userActivityFromNative, clazz,"userActivityFromNative", "(JII)V");//Initialize

for (int i = 0; i <= USER_ACTIVITY_EVENT_LAST; i++) {

gLastEventTime[i]=LLONG_MIN;

}

gPowerManagerServiceObj=NULL;return 0;

}

2. 上面 gInputHal->setHdmiOutAudioMute(onOff); 调用是通过HIDL调用HAL层接口， Service的获取：

boolgetInputHal(){if (gInputHal ==nullptr){

gInputHal=IMstarTvInput::getService();if (gInputHal ==nullptr) {

ALOGD("Load input HAL service fail");return -1;

}

}return gInputHal !=nullptr;

}

三、HAL层

1 HIDL接口定义 vendormstarhardwareinterfacestvinput1.0IMstarTvInput.hal，继承于 TvInput ：

interfaceIMstarTvInput

extends android.hardware.tv.input@1.0::ITvInput {

@callflow(next="*")//EpgManager function(31/32)

...

setHdmiOutAudioMute(boolbEnable)

generates (boolresult);

...

}

2. 接口的定义 vendormstarhardwareinterfacestvinput1.0defaultTvInput.h, TvInput 又继承于 IMstarTvInput ：

struct TvInput : publicIMstarTvInput {

TvInput(mstar_tv_input_device_t*device);~TvInput();/*mstar tv interface*/...

Return setHdmiOutAudioMute(boolbEnable);

...

}

3. 具体的方法实现在 vendormstarhardwareinterfacestvinput1.0defaultTvInput_TvManager.cpp

Return TvInput::setHdmiOutAudioMute(boolbEnable){return mDevice->TvManager_dev->setHdmiOutAudioMute(bEnable);

}

4. 其中 mDevice->TvManager_dev->setHdmiOutAudioMute() 方法的定义在：vendormstarhardwareinterfacestvinput1.0defaultmstarTvInput_TvManager_dev.h

#ifndef MSTAR_TV_INPUT_TvManager_H#define MSTAR_TV_INPUT_TvManager_H#include#include"tvmanager/TvManager.h"

using::mstar::hardware::tv::input::V1_0::ITvManagerType;

typedefstructmstar_TvManager_dev {

......bool (*setHdmiOutAudioMute)(boolbEnable);

......

}

5. 其方法实现在 vendormstarhardwaretv_inputmstar_tv_input_TvManager.cpp

bool mstar_tv_input_TvManager::setHdmiOutAudioMute(boolbEnable){return g_pTvManagerImpl->setHdmiOutAudioMute(bEnable);

}

g_pTvManagerImpl 是通过 TvManager 转换所得：

void mstar_tv_input_TvManager::registerTvManagerInstance(sp &ptr) {

g_pTvManagerImpl=ptr;

}

6. TvManager 的接口定义在 vendormstarcommonlibrariestvapihidl_wrappertvmanagerTvManager.h

class TvManager : virtual publicRefBase

{public:

TvManager();~TvManager();static spconnect();voidHIDLconnect();static voiddisconnect();

status_t setListener(const sp&listener);

...static bool setHdmiOutAudioMute(boolbEnable);

...

}

7. 方法实现在 vendormstarsupernovaprojectstvostvmanagerlibtvmanagerTvManager.cpp：

bool TvManager::setHdmiOutAudioMute(boolbOnOff)

{

ALOGV("TvManager setHdmiOutAudioMuten");return getITvManager()->setHdmiOutAudioMute(bOnOff);

}

后面就跳跃到 mstar 的 supernova 层。

四、Supernova层

1. TvManager 的 setHdmiOutAudioMute 实现在 vendormstarsupernovaprojectstvostvmanagerlibtvmanagerservice

bool TvManagerService::Client::setHdmiOutAudioMute(boolbOnOff){

TVOS_API_ESTIMATE_START()

TVOS_API_ESTIMATE_START(LOCK)

Mutex::Autolocklock(m_FuncLock);

TVOS_API_ESTIMATE_END(LOCK)

ALOGV("TvManagerService::Client::setHdmiOutAudioMuten");bool ret =FALSE;

ret= MSrv_Control::GetInstance()->setHdmiOutAudioMute(bOnOff);

TVOS_API_ESTIMATE_END()returnret;

}

2. 最终方法实现在vendormstarsupernovaprojectstvostvmanagerlibtvmanagerserviceTvManagerService.cpp，后面便是通过I2C接口对HDMI控制器的操作。

BOOL MSrv_Control_common::setHdmiOutMute(constBOOL bOnOff)

{if(MDrv_NT68411_Exist())

{if(bOnOff ==FALSE)

{

MDrv_NT68411_Write(NT68411_SUBCMD_HDMI_MUTE, HDMI_MUTE_OFF);

}else{

MDrv_NT68411_Write(NT68411_SUBCMD_HDMI_MUTE, HDMI_MUTE_ON);

}

}returnTRUE;

}