resampling using rubato

Cargo.lock

@@ -495,6 +495,7 @@ dependencies = [
  "cpal",
  "num",
  "num-traits",
+ "rubato",
  "rustfft",
  "serde",
  "serde_yaml",
@@ -844,6 +845,15 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f2ff9a1f06a88b01621b7ae906ef0211290d1c8a168a15542486a8f61c0833b9"
 
+[[package]]
+name = "realfft"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "953d9f7e5cdd80963547b456251296efc2626ed4e3cbf36c869d9564e0220571"
+dependencies = [
+ "rustfft",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.4.1"
@@ -882,6 +892,18 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
 
+[[package]]
+name = "rubato"
+version = "0.14.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6dd52e80cfc21894deadf554a5673002938ae4625f7a283e536f9cf7c17b0d5"
+dependencies = [
+ "num-complex",
+ "num-integer",
+ "num-traits",
+ "realfft",
+]
+
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"

Cargo.toml

@@ -13,3 +13,4 @@ num-traits = "0.2.18"
 rustfft = "6.2.0"
 serde = { version = "1.0.196", features = ["derive"] }
 serde_yaml = "0.9.31"
+rubato = "0.14.1"

src/audio/mod.rs

@@ -0,0 +1 @@
+pub mod resampling;

src/audio/resampling.rs

@@ -0,0 +1,21 @@
+use rubato::{Resampler, SincFixedIn, SincInterpolationParameters, SincInterpolationType, WindowFunction};
+
+pub fn resampling(current_sample_rate: u32, target_sample_rate: u32, data: Vec<Vec<f32>>) -> Vec<Vec<f32>> {
+    let params = SincInterpolationParameters {
+        sinc_len: 256,
+        f_cutoff: 0.95,
+        interpolation: SincInterpolationType::Linear,
+        oversampling_factor: 128,
+        window: WindowFunction::BlackmanHarris2,
+    };
+
+    let mut resampler = SincFixedIn::<f32>::new(
+        current_sample_rate as f64 / target_sample_rate as f64,
+        2.0,
+        params,
+        data[0].len(),
+        data.len()
+    ).unwrap();
+
+    resampler.process(&data, None).unwrap()
+}