Build fails with error[E0282] on sample-0.10.0 method

[scroix]

Just documenting my unsuccessful attempts to build from master since c8e3208 was merged, updating to nannou_0.13.

Builds are failing on the sample create (since deprecated) as reported on the nannou project. (Tested on Windows an macOS.)

• Build fails on Windows nannou-org/nannou#703
• Error when compiling nannou-org/nannou#699
• Unable to compile nannou_audio on OS X nannou-org/nannou#704

A fix was merged around is available in nannou_audio_0.15 but bumping the dependency in this project is akin to falling down the rabbit hole. 😅

This is due to some major changes to the framework, notably the move from sample to dasp.

I had a go porting the effected code directly to dasp, essentially:

[dependencies]
nannou_audio = "0.16.0"
dasp = { version = "0.11.0", features = ["all"] }

And moving from nannou_audio::sample to dasp::rms, dasp::envelope etc.

---

Not bad 👍, but now on Windows we're no longer retrieving the ASIO host from nannou_audio.

error[E0277]: `std::sync::mpsc::Sender<cpal::host::wasapi::stream::Command>` cannot be shared between threads safely
   --> src/lib\soundscape\mod.rs:754:10

And on macOS, we're blocked while compiling coreaudio-sys, which appears to be an open issue.

• Issue Compiling coreaudio-sys v0.2.6 nannou-org/nannou#714

---

Will document any progress -- perhaps a Linux system will still be viable 🤔

[scroix]

Reporting back on Linux attempt.

Switching from sample to the dasp crate didn't help unfortunately, the same error[E0277] on the same line. It wasn't ASIO specific after all?

This on Ubuntu 21.04 after adding the relevant packages.
sudo apt install build-essential libasound2-dev libx11-dev

...and disabling pulseaudio.
systemctl --user mask pulseaudio.socket
systemctl --user stop pulseaudio.service

---

error[E0277]: `*mut ()` cannot be shared between threads safely
   --> src/lib/soundscape/mod.rs:754:10
    |
754 |         .spawn(move || run(model, rx))
    |          ^^^^^ `*mut ()` cannot be shared between threads safely
    |
    = help: within `nannou_audio::stream::Shared<audio::input::Model>`, the trait `Sync` is not implemented for `*mut ()`
    = note: required because it appears within the type `PhantomData<*mut ()>`
    = note: required because it appears within the type `nannou_audio::cpal::platform::NotSendSyncAcrossAllPlatforms`
    = note: required because it appears within the type `nannou_audio::cpal::Stream`
    = note: required because it appears within the type `nannou_audio::stream::Shared<audio::input::Model>`
    = note: required because of the requirements on the impl of `Send` for `std::sync::Arc<nannou_audio::stream::Shared<audio::input::Model>>`
    = note: required because it appears within the type `nannou_audio::Stream<audio::input::Model>`
note: required because it appears within the type `soundscape::Model`
   --> src/lib/soundscape/mod.rs:125:12
    |
125 | pub struct Model {
    |            ^^^^^
    = note: required because it appears within the type `[closure@src/lib/soundscape/mod.rs:754:16: 754:38]`