Negative volume received

[marcselman]

I'm not sure this is the right place but here goes:

I'm using the Sony Songpal integration in Home Assistant.
I have a Sony STR-DN1080.
Home Assistant has discover 3 devices for my receiver.

• A Sony Songpal device
• A DLNA Digital Media Renderer device
• A Google Cast device

Everything seems to work great. But there's one strange issue.
I have my TV and a Nvidia Shield connected using HDMI-CEC.
So when I change the volume of either device, the volume of the receiver is changed.

The issue is that the first time I change the volume with either a HDMI device or the receiver itself I receive a negative volume state of -0.01818181818181818.
For example I'm using the receiver remote to change the volume and Home Assistant will receive the correct values.
Then I switch to the TV remote and Home Assistant will receive a negative value. The next volume changes with the TV remote will result in normal values.
If I then switch back to the receiver remote the first click, again, will result in the same negative value and every change after that is normal.

So everytime I switch between the receiver and a connected HDMI device I receive a negative volume once.

I hope my explanation is clear. Please let me know if this is indead an issue with this repo and if you need more information.

Thanks.

[rytilahti]

This library is reporting the values directly as given by the device, what's your use case? I'm just asking to figure out what would be the best place to filter out such invalid values. Should the library ignore this (and e.g., deliver None for negative values), or do you have another proposal?