reduce whisper-rs space

rust-whisper-lib/src/lib.rs

@@ -61,7 +61,13 @@ fn f32_from_wav_file(path: &String) -> Result<Vec<f32>, String> {
       return Err("!= 16_000 hz".to_string());
    }
    match data.as_sixteen() {
-      Some(data16) => Ok(whisper_rs::convert_integer_to_float_audio(&data16)),
+      Some(data16) => {
+         let mut floats = Vec::with_capacity(data16.len());
+         for sample in data16 {
+             floats.push(*sample as f32 / 32768.0);
+         }
+         Ok(floats)
+      },
       None => Err(format!("couldnt translate wav to 16s")),
    }
 }