Add Java API for text-to-speech (#811)

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

@@ -0,0 +1,56 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflineTtsModelConfig {
+    private final OfflineTtsVitsModelConfig vits;
+    private final int numThreads;
+    private final boolean debug;
+    private final String provider;
+
+    private OfflineTtsModelConfig(Builder builder) {
+        this.vits = builder.vits;
+        this.numThreads = builder.numThreads;
+        this.debug = builder.debug;
+        this.provider = builder.provider;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public OfflineTtsVitsModelConfig getVits() {
+        return vits;
+    }
+
+    public static class Builder {
+        private OfflineTtsVitsModelConfig vits = OfflineTtsVitsModelConfig.builder().build();
+        private int numThreads = 1;
+        private boolean debug = true;
+        private String provider = "cpu";
+
+        public OfflineTtsModelConfig build() {
+            return new OfflineTtsModelConfig(this);
+        }
+
+        public Builder setVits(OfflineTtsVitsModelConfig vits) {
+            this.vits = vits;
+            return this;
+        }
+
+        public Builder setNumThreads(int numThreads) {
+            this.numThreads = numThreads;
+            return this;
+        }
+
+        public Builder setDebug(boolean debug) {
+            this.debug = debug;
+            return this;
+        }
+
+        public Builder setProvider(String provider) {
+            this.provider = provider;
+            return this;
+        }
+    }
+}