fix mis-align problem when converting &[u8] to &[f32] (#9986)

* fix: windows, improve audio buffer (#9770)

* .

* fix statics does not record

and avoid channel changing when drio audio when audio is stero

* add some commence

* fix mis-align problem when converting &[u8] to &[f32]

* add safety commence

* revert client.rs

* avoid tmp lifetime extends

* avoid move in loop

* avoid use after drop

* another use after free

* another use after free

* make code more reasonable

---------

Co-authored-by: zylthinking <zhaoyulong@qianxin.com>

libs/hbb_common/src/lib.rs

@@ -27,6 +27,7 @@ pub use anyhow::{self, bail};
 pub use futures_util;
 pub mod config;
 pub mod fs;
+pub mod mem;
 pub use lazy_static;
 #[cfg(not(any(target_os = "android", target_os = "ios")))]
 pub use mac_address;

libs/hbb_common/src/mem.rs

@@ -0,0 +1,14 @@
+/// SAFETY: the returned Vec must not be resized or reserverd
+pub unsafe fn aligned_u8_vec(cap: usize, align: usize) -> Vec<u8> {
+    use std::alloc::*;
+
+    let layout =
+        Layout::from_size_align(cap, align).expect("invalid aligned value, must be power of 2");
+    unsafe {
+        let ptr = alloc(layout);
+        if ptr.is_null() {
+            panic!("failed to allocate {} bytes", cap);
+        }
+        Vec::from_raw_parts(ptr, 0, cap)
+    }
+}