标签：bug start 通过 comm null core 转换 clu extends
一、framework层
1. APP调用 AudioManager 的 adjustStreamVolume() 接口实现在： frameworks\base\services\core\java\com\android\server\audio\AudioService.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： frameworks\base\services\core\java\com\android\server\power\PowerManagerService.java
public static native boolean nativeSetHdmiOutAudioMute(boolean onOff);
二、Native层
1.frameworks\base\services\core\jni\com_android_server_power_PowerManagerService.cpp 中实现了 nativeSetHdmiOutAudioMute() 方法：
static jboolean nativeSetHdmiOutAudioMute(JNIEnv *env, jclass clazz, jboolean onOff){ std::lock_guard<std::mutex> lock(gPowerHalMutex); if (getInputHal()) { Return<bool> ret = gInputHal->setHdmiOutAudioMute(onOff); if (!ret.isOk()) { ALOGE("Failed to SetHdmiOutAudioMute."); return false; } return ret; } 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：
bool getInputHal(){ 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 vendor\mstar\hardware\interfaces\tv\input\1.0\IMstarTvInput.hal，继承于 TvInput ：
interface IMstarTvInput extends android.hardware.tv.input@1.0::ITvInput { @callflow(next="*") //EpgManager function(31/32) ... setHdmiOutAudioMute(bool bEnable) generates (bool result); ... }
2. 接口的定义 vendor\mstar\hardware\interfaces\tv\input\1.0\default\TvInput.h, TvInput 又继承于 IMstarTvInput ：
struct TvInput : public IMstarTvInput { TvInput(mstar_tv_input_device_t* device); ~TvInput(); /*mstar tv interface*/ ... Return<bool> setHdmiOutAudioMute(bool bEnable); ... }
3. 具体的方法实现在 vendor\mstar\hardware\interfaces\tv\input\1.0\default\TvInput_TvManager.cpp
Return<bool> TvInput::setHdmiOutAudioMute(bool bEnable){ return mDevice->TvManager_dev->setHdmiOutAudioMute(bEnable); }
4. 其中 mDevice->TvManager_dev->setHdmiOutAudioMute() 方法的定义在：vendor\mstar\hardware\interfaces\tv\input\1.0\default\mstarTvInput_TvManager_dev.h
#ifndef MSTAR_TV_INPUT_TvManager_H #define MSTAR_TV_INPUT_TvManager_H #include <mstar/hardware/tv/input/1.0/ITvManagerType.h> #include "tvmanager/TvManager.h" using ::mstar::hardware::tv::input::V1_0::ITvManagerType; typedef struct mstar_TvManager_dev { ...... bool (*setHdmiOutAudioMute)(bool bEnable); ...... }
5. 其方法实现在 vendor\mstar\hardware\tv_input\mstar_tv_input_TvManager.cpp
bool mstar_tv_input_TvManager::setHdmiOutAudioMute(bool bEnable){ return g_pTvManagerImpl->setHdmiOutAudioMute(bEnable); }
g_pTvManagerImpl 是通过 TvManager 转换所得：
void mstar_tv_input_TvManager::registerTvManagerInstance(sp<TvManager> &ptr) { g_pTvManagerImpl=ptr; }
6. TvManager 的接口定义在 vendor\mstar\common\libraries\tvapi\hidl_wrapper\tvmanager\TvManager.h
class TvManager : virtual public RefBase { public: TvManager(); ~TvManager(); static sp<TvManager> connect(); void HIDLconnect(); static void disconnect(); status_t setListener(const sp<TvManagerListener>& listener); ... static bool setHdmiOutAudioMute(bool bEnable); ... }
7. 方法实现在 vendor\mstar\supernova\projects\tvos\tvmanager\libtvmanager\TvManager.cpp：
bool TvManager::setHdmiOutAudioMute(bool bOnOff) { ALOGV("TvManager setHdmiOutAudioMute\n"); return getITvManager()->setHdmiOutAudioMute(bOnOff); }
后面就跳跃到 mstar 的 supernova 层。
四、Supernova层
1. TvManager 的 setHdmiOutAudioMute 实现在 vendor\mstar\supernova\projects\tvos\tvmanager\libtvmanagerservice\
bool TvManagerService::Client::setHdmiOutAudioMute(bool bOnOff){ TVOS_API_ESTIMATE_START() TVOS_API_ESTIMATE_START(LOCK) Mutex::Autolock lock(m_FuncLock); TVOS_API_ESTIMATE_END(LOCK) ALOGV("TvManagerService::Client::setHdmiOutAudioMute\n"); bool ret = FALSE; ret = MSrv_Control::GetInstance()->setHdmiOutAudioMute(bOnOff); TVOS_API_ESTIMATE_END() return ret; }
2. 最终方法实现在vendor\mstar\supernova\projects\tvos\tvmanager\libtvmanagerservice\TvManagerService.cpp，后面便是通过I2C接口对HDMI控制器的操作。
BOOL MSrv_Control_common::setHdmiOutMute(const BOOL 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); } } return TRUE; }
标签：bug start 通过 comm null core 转换 clu extends
原文地址：https://www.cnblogs.com/blogs-of-lxl/p/12015868.html
