Use C dtype function

Author: samanklesaria

src/libtorchaudio/overdrive.cpp

@@ -46,21 +46,23 @@ void overdrive_core_loop_cpu(
   Tensor last_in,
   const Tensor last_out,
   Tensor output_waveform) {
-    if (waveform.dtype() == aoti_torch_dtype_float64()) {
+    int32_t dtype;
+    aoti_torch_get_dtype(waveform.get(), &dtype);
+    if (dtype == aoti_torch_dtype_float64()) {
       overdrive_cpu_kernel<double>(
         Accessor<2, double>(wave_acc),
         Accessor<2, double>(temp_acc),
         Accessor<1, double>(last_in_acc),
         Accessor<1, double>(last_out_acc),
         Accessor<2, double>(out_acc));
-    } else if (waveform.dtype() == aoti_torch_dtype_float32()) {
+    } else if (dtype == aoti_torch_dtype_float32()) {
       overdrive_cpu_kernel<float>(
         Accessor<2, float>(wave_acc),
         Accessor<2, float>(temp_acc),
         Accessor<1, float>(last_in_acc),
         Accessor<1, float>(last_out_acc),
         Accessor<2, float>(out_acc));
-    } else if (waveform.dtype() == aoti_torch_dtype_float16()) {
+    } else if (dtype == aoti_torch_dtype_float16()) {
       overdrive_cpu_kernel<c10::Half>(
         Accessor<2, c10::Half>(wave_acc),
         Accessor<2, c10::Half>(temp_acc),