Fixes after review

Author: csukuangfj

sherpa-onnx/csrc/qnn/online-nemo-transducer-model-qnn.cc

@@ -127,6 +127,13 @@ class OnlineNemoTransducerModelQnn::Impl {
       SHERPA_ONNX_EXIT(-1);
     }
 
+    if (states->size() < state_input_names_.size()) {
+      SHERPA_ONNX_LOGE("states size %d is less than expected %d",
+                        static_cast<int32_t>(states->size()),
+                        static_cast<int32_t>(state_input_names_.size()));
+      SHERPA_ONNX_EXIT(-1);
+    }
+
     std::lock_guard<std::mutex> lock(mutex_);
 
     // Features come in as [num_frames, feat_dim] row-major, which matches
@@ -193,6 +200,11 @@ class OnlineNemoTransducerModelQnn::Impl {
   RunDecoder(int32_t token, std::vector<std::vector<float>> states) const {
     std::lock_guard<std::mutex> lock(mutex_);
 
+    if (states.size() < 2) {
+      SHERPA_ONNX_LOGE("states should have at least 2 elements (h and c)");
+      SHERPA_ONNX_EXIT(-1);
+    }
+
     // states[0] = h, states[1] = c
     decoder_->SetInputTensorData("y", &token, 1);
     decoder_->SetInputTensorData("h", states[0].data(),
@@ -403,6 +415,8 @@ class OnlineNemoTransducerModelQnn::Impl {
           SHERPA_ONNX_LOGE(
               "Invalid window size/shift in encoder input name '%s'",
               name.c_str());
+          SHERPA_ONNX_EXIT(-1);
+        }
 
         normalization_type_.clear();
         if (parts.size() == 4) {
@@ -416,8 +430,6 @@ class OnlineNemoTransducerModelQnn::Impl {
             SHERPA_ONNX_EXIT(-1);
           }
         }
-          SHERPA_ONNX_EXIT(-1);
-        }
 
         break;
       }

sherpa-onnx/csrc/qnn/online-recognizer-nemo-transducer-qnn-impl.h

@@ -35,6 +35,12 @@ inline OnlineRecognizerResult ConvertResult(
     int32_t frames_since_start) {
   OnlineRecognizerResult r;
 
+  // The first token is the initial blank_id_ used to bootstrap the decoder.
+  // Remove it before processing.
+  if (!src.tokens.empty()) {
+    src.tokens.erase(src.tokens.begin());
+  }
+
   r.tokens.reserve(src.tokens.size());
   r.timestamps.reserve(src.timestamps.size());
   r.ys_probs = std::move(src.ys_probs);
@@ -186,6 +192,7 @@ class OnlineRecognizerNemoTransducerQnnImpl : public OnlineRecognizerImpl {
             ++t;
           }
         } else {
+          ++r.num_trailing_blanks;
           ++t;
           num_symbols = 0;
         }