media_player: add Denon remote support

[ghost]

Provides an interface to Denon Network Receivers.
Developed for a Denon DRA-N5, see http://www.denon.co.uk/chg/product/compactsystems/networkmusicsystems/ceolpiccolo

Is it possible to add two seperate play/pause buttons to the UI?

[rmkraus]

Should this be here?

[rmkraus]

Looks good. There are, what looks like, a few debug lines floating around in there. Creating separate play and pause buttons is possible, but would require an update to the Frontend.

[fabaff]

This is a stub for the documentation. Please feel free to make suggestions to improve the page. Thanks.

[balloob]

Two play/pause buttons is currently not supported. It is supported to create two media player devices for each media player.

[ghost]

It looks like their API doesn't allow you to determine if the receiver is playing or not.

That's true, I tried some hacks but dropped the idea of parsing display information as it is too complicated and unreliable.

Creating separate play and pause buttons is possible, but would require an update to the Frontend.

Then I'll just leave it as it is.

It is supported to create two media player devices for each media player.

No, I'd need a pause button and a play button because I cannot be sure whether the player is currently playing or not.

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There are, what looks like, a few debug lines floating around in there.

Fixed, thank you for pointing out :-)
I did not test the new code yet, but as it did not change much, I believe it should work fine.

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This is a stub for the documentation.

You are awesome. I love this project, not because of the device support but because it is so easy to create new modules and contribute them 👍
Thank you for writing the documentation for me. At the moment, I have nearly no time for anything.
Both of you are really encouraging ❤️