mt6735 [Audio Driver]工厂测试模式下如果调整音量

[DESCRIPTION] MT6735Factory Mode下测试音量不够大，如何调大音量 [SOLUTION] 1，Loopback的mic音量调节： In AudioLoopbackController.cpp status_t AudioLoopbackController::OpenAudioLoopbackControlFlow(const audio_devices_t input_device, const audio_devices_t output_device) { ... if (output_device == AUDIO_DEVICE_OUT_SPEAKER) { mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_MICAMPL, kPreAmpGainMapValue[PREAMP_GAIN_2_DB]); //这里改为PREAMP_GAIN_32_DB mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_MICAMPR, kPreAmpGainMapValue[PREAMP_GAIN_2_DB]);//这里改为PREAMP_GAIN_32_DB } else { mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_MICAMPL, kPreAmpGainMapValue[PREAMP_GAIN_20_DB]);//这里改为PREAMP_GAIN_32_DB mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_MICAMPR, kPreAmpGainMapValue[PREAMP_GAIN_20_DB]);//这里改为PREAMP_GAIN_32_DB } ... } 2，Loopback的Downlink Volume调节： AudioLoopbackController.cpp中定义下面这个宏 // for use max gain for audio loopback #define AUDIO_LOOPBACK_USE_MAX_GAIN 如果还是觉得音量低，可以直接去修改其他相关寄存器..例如直接去写SPK_CON9来提高SPK音量... 3，WAV Playback的音量调节： Audio_Wave_Playabck_thread 看"AudioMtkVolumeController setMasterVolume v = %f mode = %d devices = 0x%x这条log v已经为1.0，volume已经最大... Audio_Receiver_Playabck_thread： In AudioFtm.cpp void AudioFtm::Audio_Set_Earpiece_On() { ALOGD("Audio_Set_Earpiece_On Channel\n"); mAudioAnalogInstance->AnalogOpen(AudioAnalogType:EVICE_OUT_EARPIECER, AudioAnalogType::DEVICE_PLATFORM_MACHINE); mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_HSOUTR, OutputGainMap[FTM_OUTPUTGAIN_3]);//这里改为FTM_OUTPUTGAIN_5是最大 mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_HSOUTL, OutputGainMap[FTM_OUTPUTGAIN_3]);//这里改为FTM_OUTPUTGAIN_5是最大 } void AudioFtm::Audio_Set_Speaker_On(int Channel) { ALOGD("Audio_Set_Speaker_On Channel = %d\n", Channel); mAudioAnalogInstance->AnalogOpen(AudioAnalogType::DEVICE_OUT_SPEAKERR, AudioAnalogType::DEVICE_PLATFORM_MACHINE); mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_SPKL, OutputGainMap[FTM_OUTPUTGAIN_3]);//这 里改为FTM_OUTPUTGAIN_5是最大 mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_SPKR, OutputGainMap[FTM_OUTPUTGAIN_3]);//这 里改为FTM_OUTPUTGAIN_5是最大 } void AudioFtm::Audio_Set_HeadPhone_On(int Channel) { ALOGD("Audio_Set_HeadPhone_On Channel = %d\n", Channel); mAudioAnalogInstance->AnalogOpen(AudioAnalogType::DEVICE_OUT_HEADSETR, AudioAnalogType::DEVICE_PLATFORM_MACHINE); mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_HPOUTR, OutputGainMap[FTM_OUTPUTGAIN_3]);//这里改为FTM_OUTPUTGAIN_5是最大 mAudioAnalogInstance->SetAnalogGain(AudioAnalogType::VOLUME_HPOUTL, OutputGainMap[FTM_OUTPUTGAIN_3]);//这里改为FTM_OUTPUTGAIN_5是最大 资料转载于一牛网论坛 MT6735  原文地址：http://bbs.16rd.com/thread-454412-1-1.html }