Fix exporting decoder model to onnx (#1264)

* Use torch.jit.script() to export the decoder model

See also https://github.com/k2-fsa/sherpa-onnx/issues/327

egs/aishell/ASR/pruned_transducer_stateless7/export-onnx.py

@@ -322,6 +322,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/commonvoice/ASR/pruned_transducer_stateless7/export-onnx.py

@@ -330,6 +330,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/conv_emformer_transducer_stateless2/export-onnx.py

@@ -401,6 +401,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/lstm_transducer_stateless2/export-onnx-zh.py

@@ -359,6 +359,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/lstm_transducer_stateless2/export-onnx.py

@@ -356,6 +356,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/pruned_transducer_stateless/export-onnx.py

@@ -307,6 +307,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/pruned_transducer_stateless3/export-onnx.py

@@ -312,6 +312,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/pruned_transducer_stateless5/export-onnx-streaming.py

@@ -404,6 +404,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/pruned_transducer_stateless5/export-onnx.py

@@ -335,6 +335,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/pruned_transducer_stateless7/export-onnx.py

@@ -329,6 +329,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/pruned_transducer_stateless7_streaming/export-onnx-zh.py

@@ -413,6 +413,7 @@ def export_decoder_model_onnx(
     context_size = decoder_model.decoder.context_size
     vocab_size = decoder_model.decoder.vocab_size
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/pruned_transducer_stateless7_streaming/export-onnx.py

@@ -401,6 +401,7 @@ def export_decoder_model_onnx(
     context_size = decoder_model.decoder.context_size
     vocab_size = decoder_model.decoder.vocab_size
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/zipformer/export-onnx-streaming.py

@@ -506,6 +506,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/librispeech/ASR/zipformer/export-onnx.py

@@ -353,6 +353,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/wenetspeech/ASR/pruned_transducer_stateless2/export-onnx.py

@@ -315,6 +315,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/wenetspeech/ASR/pruned_transducer_stateless5/export-onnx-streaming.py

@@ -404,6 +404,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,

egs/wenetspeech/ASR/pruned_transducer_stateless5/export-onnx.py

@@ -335,6 +335,7 @@ def export_decoder_model_onnx(
     vocab_size = decoder_model.decoder.vocab_size
 
     y = torch.zeros(10, context_size, dtype=torch.int64)
+    decoder_model = torch.jit.script(decoder_model)
     torch.onnx.export(
         decoder_model,
         y,