Address review comments

native_client/deepspeech.cc

@@ -271,11 +271,13 @@ DS_CreateModel(const char* aModelPath,
     return DS_ERR_NO_MODEL;
   }
 
+  std::unique_ptr<ModelState> model(
 #ifndef USE_TFLITE
-  std::unique_ptr<ModelState> model(new TFModelState());
+    new TFModelState()
 #else
-  std::unique_ptr<ModelState> model(new TFLiteModelState());
-#endif // USE_TFLITE
+    new TFLiteModelState()
+#endif
+  );
 
   if (!model) {
     std::cerr << "Could not allocate model state." << std::endl;

native_client/tflitemodelstate.cc

@@ -35,7 +35,8 @@ tflite_get_output_tensor_by_name(const Interpreter* interpreter, const char* nam
   return interpreter->outputs()[idx];
 }
 
-void push_back_if_not_present(std::deque<int>& list, int value)
+void
+push_back_if_not_present(std::deque<int>& list, int value)
 {
   if (std::find(list.begin(), list.end(), value) == list.end()) {
     list.push_back(value);
@@ -86,6 +87,10 @@ TFLiteModelState::TFLiteModelState()
 {
 }
 
+TFLiteModelState::~TFLiteModelState()
+{
+}
+
 int
 TFLiteModelState::init(const char* model_path,
                        unsigned int n_features,
@@ -235,8 +240,13 @@ TFLiteModelState::compute_mfcc(const vector<float>& samples, vector<float>& mfcc
     input_samples[i] = samples[i];
   }
 
-  interpreter_->SetExecutionPlan(mfcc_exec_plan_);
-  TfLiteStatus status = interpreter_->Invoke();
+  TfLiteStatus status = interpreter_->SetExecutionPlan(mfcc_exec_plan_);
+  if (status != kTfLiteOk) {
+    std::cerr << "Error setting execution plan: " << status << "\n";
+    return;
+  }
+
+  status = interpreter_->Invoke();
   if (status != kTfLiteOk) {
     std::cerr << "Error running session: " << status << "\n";
     return;

native_client/tflitemodelstate.h

@@ -32,6 +32,7 @@ struct TFLiteModelState : public ModelState
   std::vector<int> mfcc_exec_plan_;
 
   TFLiteModelState();
+  virtual ~TFLiteModelState();
 
   virtual int init(const char* model_path,
                    unsigned int n_features,