Add support for seeking audio.

[Gnamra]

What problem does this solve or what need does it fill?

Seeking audio is practically a must have for any rhythm game that wants to have a beatmap editor.
In the song selection screen of a rhythm game, it is also common to play a preview of the song you have selected. Usually this preview starts somewhere in the song, and not from the beginning.

What solution would you like?

If I'm not mistaken bevy_audio uses Symphonia and Rodio. Symphonia already supports seeking, exposing this would be enough for my use case. Additionally, it would be nice to be able to get total playtime of the audio file since that would make it easier to make decisions about where to start previewing a file.

What alternative(s) have you considered?

Setting the playback speed very high to advance to the point you want to seek to in a single frame, but that's not very elegant. bevy_kira_audio is the only reasonable alternative right now as far as I know.

[harudagondi]

Bevy uses Symphonia indirectly, and Rodio has not exposed API for seeking. Please see:

• Seeking RustAudio/rodio#176

Currently Bevy is blocked on this.

[shimekukuri]

(Update) Rodio feature Audio Seek awaiting review and pull request.

See: RustAudio/rodio#513

[dvdsk]

has been merged 🥳

l will cut a release in a few days but you should be able to start building a PR on top of it now.

[Gnamra]

@harudagondi Since we are no longer waiting for rodio, can the blocked label be removed?

[SolarLiner]

I've removed the blocked label, so anybody feel free to tackle this!

It should be noted that work on this will soon be superceeded by the ongoing work to replace rodio with kira, so it has a limited shelf life; however contributions are still welcome.