Constant AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED

pub const AV_DEV_TO_APP_VOLUME_LEVEL_CHANGED: u32 = 1129729868; // 1_129_729_868u32

Volume level change message.

Device informs that volume level has changed.

data: double: new volume with range of 0.0 - 1.0.