车机音频参数下发流程

比如以audioControlWrapper.setParametersToAmp(keyPairValues); 下发banlance为例，链路如下

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hal层

1. AudioControl.cpp    hardware\interfaces\automotive\audiocontrol\aidl\default\AudioControl.cpp

ndk::ScopedAStatus AudioControl::setParametersToAmp(const std::string &keyPairValues)

ndk::ScopedAStatus AudioControl::gvmSetParameters(const hidl_string& key, const hidl_string& value) const

2. AudioDevice.cpp    vendor\qcom\opensource\audio-hal-ar\primary-hal\hal-pal\AudioDevice.cpp

int AudioDevice::SetParameters(const char *kvpairs) 

ret = dynaudio_control_interface_->setParameter((void *)kvpairs);

3. DynAudioControl.cpp    vendor\qcom\opensource\audio-hal-ar\primary-hal\hal-pal\zeekr_audio\DynAudioControl\src\DynAudioControl.cpp

int32_t DynAudioControl::setParameter(void* params)

GVMWrapper   pWrapper->setParameter(params);

4. GVMWrapper.cpp    vendor\qcom\opensource\audio-hal-ar\primary-hal\hal-pal\zeekr_audio\DynAudioControl\Wrapper\GVMWrapper.cpp
int32_t GVMWrapper::setParameter(void *params)

    auto iter = gSetParmsHandlerTable.find(key);
    if (iter != gSetParmsHandlerTable.end()) {
        auto s = Utils::splitString2Vector(value, DELIM_DEFAULT);
        LOG_I("[%s]: Key is %s", __func__, iter->first.c_str());
        ret = (this->*(iter->second))(s);
    }
    
在 gSetParmsHandlerTable 中通过AC_KEY_AUDIO_SOURCE

调用 setBalance

5. GVMAudioLogic.cpp    vendor\qcom\opensource\audio-hal-ar\primary-hal\hal-pal\zeekr_audio\DynAudioControl\AudioLogic\GVMAudioLogic.cpp

在int32_t GVMAudioLogic::setBalance(uint32_t source, int32_t step) 中调用sendAudioHalParam(AC_OP_SET_BALANCE, DOUBLE_PARAMS, source, step);

在 sendAudioHalParam 中通过audio_fdbus_client_->sendAudioMsg给qnx发消息

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qnx 层

1. faudiohal_server.cpp    qnx_app\workspace\modules\audio\audio_manager_ipc\fdbus_server\src\faudiohal_server.cpp

void AudioFdbusService::onInvoke(CBaseJob::Ptr &msg_ref)

2. msg_switch_logic.cpp    qnx_app\workspace\modules\audio\audio_manager_ipc\logic\src\msg_switch_logic.cpp    

int32_t SwitchMsgHandler::sendAudioHALMsgToAudioManager(AudioFdbusMsg &audiohal_param)

            return AudioManagerProxy::getInstance()->send(audiohal_param.operation_code, (void*)audiohal_param.params,
                        audiohal_param.params_count * sizeof(uint32_t));

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