Fix a punctuation bug (#764)

Author: csukuangfj

CMakeLists.txt

@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.13 FATAL_ERROR)
 project(sherpa-onnx)
 
-set(SHERPA_ONNX_VERSION "1.9.18")
+set(SHERPA_ONNX_VERSION "1.9.19")
 
 # Disable warning about
 #

sherpa-onnx/csrc/offline-punctuation-ct-transformer-impl.h

@@ -98,7 +98,7 @@ class OfflinePunctuationCtTransformerImpl : public OfflinePunctuationImpl {
       int32_t dot_index = -1;
       int32_t comma_index = -1;
 
-      for (int32_t m = this_punctuations.size() - 1; m >= 1; --m) {
+      for (int32_t m = this_punctuations.size() - 2; m >= 1; --m) {
         int32_t punct_id = this_punctuations[m];
 
         if (punct_id == meta_data.dot_id || punct_id == meta_data.quest_id) {
@@ -126,27 +126,20 @@ class OfflinePunctuationCtTransformerImpl : public OfflinePunctuationImpl {
         }
       } else {
         last = this_start + dot_index + 1;
+      }
 
+      if (dot_index != 1) {
         punctuations.insert(punctuations.end(), this_punctuations.begin(),
                             this_punctuations.begin() + (dot_index + 1));
       }
     }  // for (int32_t i = 0; i != num_segments; ++i)
 
-    if (punctuations.size() != token_ids.size() &&
-        punctuations.size() + 1 == token_ids.size()) {
-      punctuations.push_back(meta_data.dot_id);
-    }
-
-    if (punctuations.size() != token_ids.size()) {
-      SHERPA_ONNX_LOGE("%s, %d, %d. Some unexpected things happened",
-                       text.c_str(), static_cast<int32_t>(punctuations.size()),
-                       static_cast<int32_t>(token_ids.size()));
-      return text;
-    }
-
     std::string ans;
 
     for (int32_t i = 0; i != static_cast<int32_t>(punctuations.size()); ++i) {
+      if (i > tokens.size()) {
+        break;
+      }
       const std::string &w = tokens[i];
       if (i > 0 && !(ans.back() & 0x80) && !(w[0] & 0x80)) {
         ans.push_back(' ');
@@ -156,6 +149,9 @@ class OfflinePunctuationCtTransformerImpl : public OfflinePunctuationImpl {
         ans.append(meta_data.id2punct[punctuations[i]]);
       }
     }
+    if (ans.back() != meta_data.dot_id && ans.back() != meta_data.quest_id) {
+      ans.push_back(meta_data.dot_id);
+    }
 
     return ans;
   }