mt6735 如何修改代码彻底关闭语音增强处理

[DESCRIPTION]
很多客户因为添加了外部降噪芯片，需要关闭mtk内部的语音增强处理
[SOLUTION]
1，彻底关闭通话中所有的语音增强处理(包括AGC，Digital Gain以及所有的SPE)，修改code如下：
SpeechDriverLAD.cpp \mediatek\platform\common\hardware\audio\speech_driver
/*==============================================================================
* Speech Enhancement Control
*============================================================================*/
status_t SpeechDriverLAD::SetSpeechEnhancement(bool enhance_on)
{
// speech enhancement off
return pCCCI->SendMessageInQueue(pCCCI->InitCcciMailbox(MSG_A2M_CTRL_SPH_ENH, 0, 0));
/* original code
ALOGD("%s(), enhance_on = %d", __FUNCTION__, enhance_on);
return pCCCI->SendMessageInQueue(pCCCI->InitCcciMailbox(MSG_A2M_CTRL_SPH_ENH, enhance_on, 0));
*/
}

2，如果需要关闭AP Site的语音增强(影响范围包括VoIP，Record，语音识别等)，修改code如下：
alps\mediatek\platform\MT6592\hardware\audio\aud_drv\ AudioMTKStreamIn.cpp
可以bypass掉所有的AP side recording effect
uint32_t AudioMTKStreamIn::BesRecordPreprocess(void *buffer , uint32_t bytes, AdditionalInfo_STRUCT
AddInfo)
{
// ALOGD("BesRecordPreprocess bytes=%d", bytes);
// speech enhancement off
return bytes;
/*Origin Code
HDRecordPreprocess(buffer , bytes, AddInfo);
return bytes;
*/
}
void AudioMTKStreamIn::StartHDRecord(SPE_MODE mode)
{
// speech enhancement off
/*Origin Code
if ((mAttribute.mdevices ！= AUDIO_DEVICE_IN_FM) && (mAttribute.mdevices ！= AUDIO_DEVICE_IN_MATV))
{
mpSPELayer->Start(mode);
}
*/
}