Expose dither for JNI (#2215)

sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/FeatureConfig.java

@@ -6,10 +6,12 @@ package com.k2fsa.sherpa.onnx;
 public class FeatureConfig {
     private final int sampleRate;
     private final int featureDim;
+    private final float dither;
 
     private FeatureConfig(Builder builder) {
         this.sampleRate = builder.sampleRate;
         this.featureDim = builder.featureDim;
+        this.dither = builder.dither;
     }
 
     public static Builder builder() {
@@ -24,9 +26,14 @@ public class FeatureConfig {
         return featureDim;
     }
 
+   public float getDither() {
+        return dither;
+   }
+
     public static class Builder {
         private int sampleRate = 16000;
         private int featureDim = 80;
+        private float dither = 0.0f;
 
         public FeatureConfig build() {
             return new FeatureConfig(this);
@@ -41,5 +48,9 @@ public class FeatureConfig {
             this.featureDim = featureDim;
             return this;
         }
+        public Builder setDither(float dither) {
+            this.dither = dither;
+            return this;
+        }
     }
 }

sherpa-onnx/jni/keyword-spotter.cc

@@ -49,6 +49,9 @@ static KeywordSpotterConfig GetKwsConfig(JNIEnv *env, jobject config) {
   fid = env->GetFieldID(feat_config_cls, "featureDim", "I");
   ans.feat_config.feature_dim = env->GetIntField(feat_config, fid);
 
+  fid = env->GetFieldID(feat_config_cls, "dither", "F");
+  ans.feat_config.dither = env->GetFloatField(feat_config, fid);
+
   //---------- model config ----------
   fid = env->GetFieldID(cls, "modelConfig",
                         "Lcom/k2fsa/sherpa/onnx/OnlineModelConfig;");

sherpa-onnx/jni/offline-recognizer.cc

@@ -62,6 +62,9 @@ static OfflineRecognizerConfig GetOfflineConfig(JNIEnv *env, jobject config) {
   fid = env->GetFieldID(feat_config_cls, "featureDim", "I");
   ans.feat_config.feature_dim = env->GetIntField(feat_config, fid);
 
+  fid = env->GetFieldID(feat_config_cls, "dither", "F");
+  ans.feat_config.dither = env->GetFloatField(feat_config, fid);
+
   //---------- model config ----------
   fid = env->GetFieldID(cls, "modelConfig",
                         "Lcom/k2fsa/sherpa/onnx/OfflineModelConfig;");

sherpa-onnx/jni/online-recognizer.cc

@@ -65,6 +65,9 @@ static OnlineRecognizerConfig GetConfig(JNIEnv *env, jobject config) {
   fid = env->GetFieldID(feat_config_cls, "featureDim", "I");
   ans.feat_config.feature_dim = env->GetIntField(feat_config, fid);
 
+  fid = env->GetFieldID(feat_config_cls, "dither", "F");
+  ans.feat_config.dither = env->GetFloatField(feat_config, fid);
+
   //---------- enable endpoint ----------
   fid = env->GetFieldID(cls, "enableEndpoint", "Z");
   ans.enable_endpoint = env->GetBooleanField(config, fid);

sherpa-onnx/kotlin-api/FeatureConfig.kt

@@ -3,6 +3,7 @@ package com.k2fsa.sherpa.onnx
 data class FeatureConfig(
     var sampleRate: Int = 16000,
     var featureDim: Int = 80,
+    var dither: Float = 0.0f
 )
 
 fun getFeatureConfig(sampleRate: Int, featureDim: Int): FeatureConfig {