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AudioResample.cs

@@ -21,17 +21,13 @@ public class AudioResample : MonoBehaviour
     public bool playFinalAudio = true;
 
     IWorker engine;
+    IBackend backend;
 
-    BackendType backend = BackendType.GPUCompute;
-
-    Ops ops;
-    ITensorAllocator allocator;
+    BackendType backendType = BackendType.GPUCompute;
 
     void Start()
     {
-        allocator = new TensorCachingAllocator();
-        ops = WorkerFactory.CreateOps(backend, allocator);
-
+        backend = WorkerFactory.CreateBackend(backendType);
         ConvertAudio();
     }
 
@@ -62,7 +58,7 @@ public class AudioResample : MonoBehaviour
             return;
         }
 
-        engine = WorkerFactory.CreateWorker(backend, model);
+        engine = WorkerFactory.CreateWorker(backendType, model);
 
         int channels = inputAudio.channels;
         int size = inputAudio.samples * channels;
@@ -76,15 +72,23 @@ public class AudioResample : MonoBehaviour
 
         var output = engine.PeekOutput() as TensorFloat;
         if (inputAudio.frequency == 44100)
-        { 
-            using var A = output.ShallowReshape(new TensorShape( output.shape[1] / 2 , 2)) as TensorFloat;
-            using var B = ops.Slice(A, new[] { 0 }, new[] { 1 }, new[] { 1 }, new[] { 1 });
-            B.MakeReadable();
-            outData = B.ToReadOnlyArray();
+        {
+            //The model gives 2x as many samples as we would like so we fix it:
+            //We need to pad it if it has odd number of samples
+            int n = output.shape[1] % 2;
+            using var output2 = TensorFloat.AllocNoData(new TensorShape(1, output.shape[1] + n));
+            backend.Pad(output, output2, new int[] { 0, n }, Unity.Sentis.Layers.PadMode.Constant, 0);
+            
+            //Now we take every second sample:
+            output2.Reshape(new TensorShape(output2.shape[1] / 2, 2));
+            using var output3 = TensorFloat.AllocNoData(new TensorShape(output2.shape[0], 1));
+            backend.Slice(output2, output3, new[] { 0 }, new[] { 1 }, new[] { 1 });
+            output3.CompleteOperationsAndDownload();
+            outData = output3.ToReadOnlyArray();
         }
         else
         {
-            output.MakeReadable();
+            output.CompleteOperationsAndDownload();
             outData = output.ToReadOnlyArray();
         }
 
@@ -103,7 +107,7 @@ public class AudioResample : MonoBehaviour
 
     private void OnDestroy()
     {
-        ops?.Dispose();
-        allocator?.Dispose();
+        engine?.Dispose();
+        backend?.Dispose();
     }
-}
+}

README.md

@@ -4,9 +4,7 @@ library_name: unity-sentis
 pipeline_tag: audio-to-audio
 ---
 
-# Model to turn 44kHz and 22kHz audio to 16kHz for Sentis (Version 1.3.0-pre.3*)
-*Version 1.3.0 Sentis files are not compatible with Sentis version 1.4.0 and need to be recreated/downloaded
-
+# Model to turn 44kHz and 22kHz audio to 16kHz (Sentis version 1.4.0)
 This contains models in Sentis format to convert 44kHz and 22kHz audioclips to 16kHz. Useful for models such as [Whisper-Tiny](https://huggingface.co/unity/sentis-whisper-tiny)
 
 ## How to Use

info.json

@@ -6,7 +6,7 @@
         "audio_resample_22050_16000.sentis",
         "audio_resample_44100_16000.sentis"
     ],
-    "version": [
-        "1.3.0-pre.3"
+    "version":[
+        "1.4.0"
     ]
 }