Support scaling the duration of a pause in TTS. (#1820)

harmony-os/SherpaOnnxHar/sherpa_onnx/src/main/cpp/non-streaming-tts.cc

@@ -146,6 +146,7 @@ static Napi::External<SherpaOnnxOfflineTts> CreateOfflineTtsWrapper(
   SHERPA_ONNX_ASSIGN_ATTR_STR(rule_fsts, ruleFsts);
   SHERPA_ONNX_ASSIGN_ATTR_INT32(max_num_sentences, maxNumSentences);
   SHERPA_ONNX_ASSIGN_ATTR_STR(rule_fars, ruleFars);
+  SHERPA_ONNX_ASSIGN_ATTR_STR(silence_scale, silenceScale);
 
 #if __OHOS__
   std::unique_ptr<NativeResourceManager,

harmony-os/SherpaOnnxHar/sherpa_onnx/src/main/ets/components/NonStreamingTts.ets

@@ -52,6 +52,7 @@ export class OfflineTtsConfig {
   public ruleFsts: string = '';
   public ruleFars: string = '';
   public maxNumSentences: number = 1;
+  public silenceScale: number = 0.2;
 }
 
 export class TtsOutput {
@@ -98,4 +99,4 @@ export class OfflineTts {
   generateAsync(input: TtsInput): Promise<TtsOutput> {
     return offlineTtsGenerateAsync(this.handle, input);
   }
-}
+}