Add C++ runtime for parakeet-tdt-0.6b-v2. (#2181)

@@ -138,6 +138,12 @@ class OfflineRecognizerTransducerNeMoImpl : public OfflineRecognizerImpl {
 
  private:
   void PostInit() {
+    int32_t feat_dim = model_->FeatureDim();
+
+    if (feat_dim > 0) {
+      config_.feat_config.feature_dim = feat_dim;
+    }
+
     config_.feat_config.nemo_normalize_type =
         model_->FeatureNormalizationMethod();
 

@@ -164,6 +164,8 @@ class OfflineTransducerNeMoModel::Impl {
 
   bool IsGigaAM() const { return is_giga_am_; }
 
+  int32_t FeatureDim() const { return feat_dim_; }
+
  private:
   void InitEncoder(void *model_data, size_t model_data_length) {
     encoder_sess_ = std::make_unique<Ort::Session>(
@@ -201,6 +203,7 @@ class OfflineTransducerNeMoModel::Impl {
     SHERPA_ONNX_READ_META_DATA(pred_rnn_layers_, "pred_rnn_layers");
     SHERPA_ONNX_READ_META_DATA(pred_hidden_, "pred_hidden");
     SHERPA_ONNX_READ_META_DATA_WITH_DEFAULT(is_giga_am_, "is_giga_am", 0);
+    SHERPA_ONNX_READ_META_DATA_WITH_DEFAULT(feat_dim_, "feat_dim", -1);
 
     if (normalize_type_ == "NA") {
       normalize_type_ = "";
@@ -263,6 +266,11 @@ class OfflineTransducerNeMoModel::Impl {
   int32_t pred_rnn_layers_ = -1;
   int32_t pred_hidden_ = -1;
   int32_t is_giga_am_ = 0;
+
+  // giga am uses 64
+  // parakeet-tdt-0.6b-v2 uses 128
+  // others use 80
+  int32_t feat_dim_ = -1;  // -1 means to use default values.
 };
 
 OfflineTransducerNeMoModel::OfflineTransducerNeMoModel(
@@ -317,6 +325,10 @@ std::string OfflineTransducerNeMoModel::FeatureNormalizationMethod() const {
 
 bool OfflineTransducerNeMoModel::IsGigaAM() const { return impl_->IsGigaAM(); }
 
+int32_t OfflineTransducerNeMoModel::FeatureDim() const {
+  return impl_->FeatureDim();
+}
+
 #if __ANDROID_API__ >= 9
 template OfflineTransducerNeMoModel::OfflineTransducerNeMoModel(
     AAssetManager *mgr, const OfflineModelConfig &config);

@@ -88,6 +88,8 @@ class OfflineTransducerNeMoModel {
 
   bool IsGigaAM() const;
 
+  int32_t FeatureDim() const;
+
  private:
   class Impl;
   std::unique_ptr<Impl> impl_;