Fix nemo streaming transducer greedy search (#944)

sherpa-onnx/csrc/online-transducer-greedy-search-nemo-decoder.h

@@ -7,27 +7,22 @@
 #define SHERPA_ONNX_CSRC_ONLINE_TRANSDUCER_GREEDY_SEARCH_NEMO_DECODER_H_
 
 #include <vector>
+
 #include "sherpa-onnx/csrc/online-transducer-decoder.h"
 #include "sherpa-onnx/csrc/online-transducer-nemo-model.h"
 
 namespace sherpa_onnx {
 
+class OnlineStream;
+
 class OnlineTransducerGreedySearchNeMoDecoder {
  public:
   OnlineTransducerGreedySearchNeMoDecoder(OnlineTransducerNeMoModel *model,
                                           float blank_penalty)
-      : model_(model),
-      blank_penalty_(blank_penalty) {}
+      : model_(model), blank_penalty_(blank_penalty) {}
 
-  OnlineTransducerDecoderResult GetEmptyResult() const;
-  void UpdateDecoderOut(OnlineTransducerDecoderResult *result) {}
-  void StripLeadingBlanks(OnlineTransducerDecoderResult * /*r*/) const {}
-  
-  std::vector<Ort::Value> Decode(
-    Ort::Value encoder_out, 
-    std::vector<Ort::Value> decoder_states, 
-    std::vector<OnlineTransducerDecoderResult> *result,
-    OnlineStream **ss = nullptr, int32_t n = 0);
+  // @param n number of elements in ss
+  void Decode(Ort::Value encoder_out, OnlineStream **ss, int32_t n) const;
 
  private:
   OnlineTransducerNeMoModel *model_;  // Not owned
@@ -37,4 +32,3 @@ class OnlineTransducerGreedySearchNeMoDecoder {
 }  // namespace sherpa_onnx
 
 #endif  // SHERPA_ONNX_CSRC_ONLINE_TRANSDUCER_GREEDY_SEARCH_NEMO_DECODER_H_
-