myvtm/Module/mod_SurveillanceRecorder/volumekeeper.h

#pragma once

// kept value: 0-100
void *volume_keeper_create(const char *dev_key_name, int in_dev, int kept_value);
void volume_keeper_destroy(void *keeper);
void volume_keeper_change(void *inst,int change_value);
bool volume_change(const char *dev_key_name, int in_dev,float change_value);
bool get_audiodevice_volumn(const char *dev_key_name, int in_dev,float*fCurValue);