Add support for WAV playback inside notebook cell

[robinhad]

This pull request adds support for WAV playback inside notebook cell.

Screen.recording.2021-03-04.12.49.50.mov

It fixes microsoft/vscode-jupyter#1012.

[ghost]

All CLA requirements met.

[DonJayamanne]

Thanks a lot @robinhad
A lot of users have requested this feature.

The one concern I have with this is the fact that we will now always render HTML & not VS Code.
There are a few drawbacks to this (styles, custom commands, links, etc) - we're now going to have to own this as well.

Once again, thanks for this PR.

[DonJayamanne]

Starred a conversation here microsoft/vscode#118275

[robinhad]

Thank you for your reply, @DonJayamanne !
Only good alternative will be to build VSCode with some kind of "libre" ffmpeg - with only wav, ogg, vorbis for audio and AV1 for video.
It will facilitate the most common use cases for audio/video processing and will not bloat VSCode too much.

[khlevon]

Hi thanks for this PR.

Can someone review and merge this PR, please?

@rchiodo

[khlevon]

@robinhad Can you please provide guide how can I use this patch like in beta mode in my workaround.

[rchiodo]

I don't think we're going to take this PR. We'd rather not have an html viewer in the jupyter extension. VS code should address the underlying problem instead as in this issue:

microsoft/vscode#118275

[rchiodo]

@robinhad if you wanted to ship this, you could make your own renderer extension for the 'text/html' mimetype.