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If ASIO fails to load, the build crashes, but I need it to be optional

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Issue 类型
功能
描述清晰度
基本清楚
活跃度
停滞
技术栈
rust

调研方向

Start by reading the issue’s ASIO build configuration and how backend selection handles unavailable devices; the issue names no source files or tests. The requested behavior is to let an application use WASAPI when ASIO setup fails and expose an error for debugging. Done means the issue’s fallback scenario can run without ASIO and the failure is diagnosable.

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描述

host - asio

Hello,

I am developing an audio application and I need to have ASIO support for low-latency. So, considering that, in my cargo.toml I have "cpal = { version = "0.17.0", features = ["asio"] }". However, if it fails to download SDK or ASIO doesn't get properly loaded for whatever reason, the app just crashes and never runs. Which is not ideal for me.

Errors in my example:

error: IO error for operation on C:...\asio_sdk\host: The system cannot find the path specified. (os error 3)
error: IO error for operation on C:...\asio_sdk\host/pc: The system cannot find the path specified. (os error 3)
error: IO error for operation on C:...\asio_sdk\common: The system cannot find the path specified. (os error 3)

I don't know how this error happened, I already had ASIO SDK installed because I use FL Studio, but the folder isn't named "asio_sdk", it is "ASIOSDK". And because of that, it crashes, but I would like it to just fallback to WASAPI for example and log errors for debugging. ASIO isn't required for my application.

I know how to fix this error btw, I just set "CPAL_ASIO_DIR" env variable myself, that's not an issue.

Any ideas on how I can achieve this at the moment? Or if it might be possible in the future? Thanks for taking the time to read this. Any help is greatly appreciated.

主要语言
Rust
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环境准备

  • 提供 Dockerfile 或 Docker Compose 文件
  • 没有 Pull Request 模板
  • 阅读贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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