return timestamps for WebAssembly (#737)

wasm/asr/CMakeLists.txt

@@ -13,10 +13,14 @@ set(exported_functions
   CreateOnlineRecognizer
   CreateOnlineStream
   DecodeOnlineStream
+  DestroyOfflineStreamResultJson
   DestroyOnlineRecognizer
   DestroyOnlineRecognizerResult
   DestroyOnlineStream
+  DestroyOnlineStreamResultJson
+  GetOfflineStreamResultAsJson
   GetOnlineStreamResult
+  GetOnlineStreamResultAsJson
   InputFinished
   IsEndpoint
   IsOnlineStreamReady

wasm/asr/app-asr.js

@@ -108,7 +108,7 @@ if (navigator.mediaDevices.getUserMedia) {
       }
 
       let isEndpoint = recognizer.isEndpoint(recognizer_stream);
-      let result = recognizer.getResult(recognizer_stream);
+      let result = recognizer.getResult(recognizer_stream).text;
 
 
       if (result.length > 0 && lastResult != result) {

wasm/asr/sherpa-onnx-asr.js

@@ -661,13 +661,12 @@ class OfflineRecognizer {
   }
 
   getResult(stream) {
-    const r = this.Module._GetOfflineStreamResult(stream.handle);
+    const r = this.Module._GetOfflineStreamResultAsJson(stream.handle);
+    const jsonStr = this.Module.UTF8ToString(r);
+    const ans = JSON.parse(jsonStr);
+    this.Module._DestroyOfflineStreamResultJson(r);
 
-    const textPtr = this.Module.getValue(r, 'i8*');
-    const text = this.Module.UTF8ToString(textPtr);
-
-    this.Module._DestroyOfflineRecognizerResult(r);
-    return text;
+    return ans;
   }
 };
 
@@ -750,11 +749,13 @@ class OnlineRecognizer {
   }
 
   getResult(stream) {
-    const r = this.Module._GetOnlineStreamResult(this.handle, stream.handle);
-    const textPtr = this.Module.getValue(r, 'i8*');
-    const text = this.Module.UTF8ToString(textPtr);
-    this.Module._DestroyOnlineRecognizerResult(r);
-    return text;
+    const r =
+        this.Module._GetOnlineStreamResultAsJson(this.handle, stream.handle);
+    const jsonStr = this.Module.UTF8ToString(r);
+    const ans = JSON.parse(jsonStr);
+    this.Module._DestroyOnlineStreamResultJson(r);
+
+    return ans;
   }
 }
 

wasm/nodejs/CMakeLists.txt

@@ -21,22 +21,26 @@ set(exported_functions
   DestroyOnlineRecognizer
   DestroyOnlineRecognizerResult
   DestroyOnlineStream
+  DestroyOnlineStreamResultJson
   GetOnlineStreamResult
+  GetOnlineStreamResultAsJson
   InputFinished
   IsEndpoint
   IsOnlineStreamReady
   Reset
   # non-streaming ASR
-  PrintOfflineRecognizerConfig
-  CreateOfflineRecognizer
-  DestroyOfflineRecognizer
-  CreateOfflineStream
-  DestroyOfflineStream
   AcceptWaveformOffline
-  DecodeOfflineStream
+  CreateOfflineRecognizer
+  CreateOfflineStream
   DecodeMultipleOfflineStreams
-  GetOfflineStreamResult
+  DecodeOfflineStream
+  DestroyOfflineRecognizer
   DestroyOfflineRecognizerResult
+  DestroyOfflineStream
+  DestroyOfflineStreamResultJson
+  GetOfflineStreamResult
+  GetOfflineStreamResultAsJson
+  PrintOfflineRecognizerConfig
   # online kws
   CreateKeywordSpotter
   DestroyKeywordSpotter