Add jni interface and kotlin API examples for TTS.

kotlin-api-examples/.gitignore

@@ -0,0 +1,3 @@
+hs_err*
+main.jar
+vits-zh-aishell3

kotlin-api-examples/Main.kt

@@ -3,6 +3,28 @@ package com.k2fsa.sherpa.onnx
 import android.content.res.AssetManager
 
 fun main() {
+  testTts()
+  testAsr()
+}
+
+fun testTts() {
+  var config = OfflineTtsConfig(
+    model=OfflineTtsModelConfig(
+      vits=OfflineTtsVitsModelConfig(
+        model="./vits-zh-aishell3/vits-aishell3.onnx",
+        lexicon="./vits-zh-aishell3/lexicon.txt",
+        tokens="./vits-zh-aishell3/tokens.txt",
+      ),
+      numThreads=1,
+      debug=true,
+    )
+  )
+  val tts = OfflineTts(config=config)
+  val audio = tts.generate(text="林美丽最美丽!", sid=99, speed=1.2f)
+  audio.save(filename="99.wav")
+}
+
+fun testAsr() {
     var featConfig = FeatureConfig(
         sampleRate = 16000,
         featureDim = 80,

kotlin-api-examples/Tts.kt

@@ -0,0 +1,112 @@
+// Copyright (c)  2023  Xiaomi Corporation
+package com.k2fsa.sherpa.onnx
+
+import android.content.res.AssetManager
+
+data class OfflineTtsVitsModelConfig(
+    var model: String,
+    var lexicon: String,
+    var tokens: String,
+    var noiseScale: Float = 0.667f,
+    var noiseScaleW: Float = 0.8f,
+    var lengthScale: Float = 1.0f,
+)
+
+data class OfflineTtsModelConfig(
+    var vits: OfflineTtsVitsModelConfig,
+    var numThreads: Int = 1,
+    var debug: Boolean = false,
+    var provider: String = "cpu",
+)
+
+data class OfflineTtsConfig(
+    var model: OfflineTtsModelConfig,
+)
+
+class GeneratedAudio(
+    val samples : FloatArray,
+    val sampleRate: Int,
+) {
+    fun save(filename: String) = saveImpl(filename=filename, samples=samples, sampleRate=sampleRate)
+
+    private external fun saveImpl(
+        filename: String,
+        samples: FloatArray,
+        sampleRate: Int
+    ): Boolean
+}
+
+class OfflineTts(
+    assetManager: AssetManager? = null,
+    var config: OfflineTtsConfig,
+) {
+    private var ptr: Long
+
+    init {
+        if (assetManager != null) {
+            ptr = new(assetManager, config)
+        } else {
+            ptr = newFromFile(config)
+        }
+    }
+
+    fun generate(
+        text: String,
+        sid: Int = 0,
+        speed: Float = 1.0f
+    ): GeneratedAudio {
+      var objArray = generateImpl(ptr, text=text, sid=sid, speed=speed)
+      return GeneratedAudio(samples=objArray[0] as FloatArray,
+                            sampleRate=objArray[1] as Int)
+    }
+
+    fun allocate(assetManager: AssetManager? = null) {
+      if (ptr == 0L) {
+        if (assetManager != null) {
+          ptr = new(assetManager, config)
+        } else {
+          ptr = newFromFile(config)
+        }
+      }
+    }
+
+    fun free() {
+      if (ptr != 0L) {
+        delete(ptr)
+        ptr = 0
+      }
+    }
+
+    protected fun finalize() {
+        delete(ptr)
+    }
+
+    private external fun new(
+        assetManager: AssetManager,
+        config: OfflineTtsConfig,
+    ): Long
+
+    private external fun newFromFile(
+        config: OfflineTtsConfig,
+    ): Long
+
+    private external fun delete(ptr: Long)
+
+    // The returned array has two entries:
+    //  - the first entry is an 1-D float array containing audio samples.
+    //    Each sample is normalized to the range [-1, 1]
+    //  - the second entry is the sample rate
+    external fun generateImpl(
+        ptr: Long,
+        text: String,
+        sid: Int = 0,
+        speed: Float = 1.0f
+    ): Array<Any>
+
+    companion object {
+        init {
+            System.loadLibrary("sherpa-onnx-jni")
+        }
+    }
+
+}

kotlin-api-examples/run.sh

@@ -6,21 +6,24 @@
 
 set -e
 
+
 cd ..
 mkdir -p build
 cd build
 
-cmake \
-  -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
-  -DSHERPA_ONNX_ENABLE_TESTS=OFF \
-  -DSHERPA_ONNX_ENABLE_CHECK=OFF \
-  -DBUILD_SHARED_LIBS=ON \
-  -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
-  -DSHERPA_ONNX_ENABLE_JNI=ON \
-  ..
-
-make -j4
-ls -lh lib
+if [ ! -f ../build/lib/libsherpa-onnx-jni.dylib ]; then
+  cmake \
+    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+    -DBUILD_SHARED_LIBS=ON \
+    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+    -DSHERPA_ONNX_ENABLE_JNI=ON \
+    ..
+
+  make -j4
+  ls -lh lib
+fi
 
 export LD_LIBRARY_PATH=$PWD/build/lib:$LD_LIBRARY_PATH
 
@@ -31,7 +34,7 @@ if [ ! -f ./sherpa-onnx-streaming-zipformer-en-2023-02-21/tokens.txt ]; then
   git clone https://huggingface.co/csukuangfj/sherpa-onnx-streaming-zipformer-en-2023-02-21
 fi
 
-kotlinc-jvm -include-runtime -d main.jar Main.kt WaveReader.kt SherpaOnnx.kt faked-asset-manager.kt
+kotlinc-jvm -include-runtime -d main.jar Main.kt WaveReader.kt SherpaOnnx.kt faked-asset-manager.kt Tts.kt
 
 ls -lh main.jar
 

sherpa-onnx/csrc/lexicon.cc

@@ -10,7 +10,15 @@
 #include <sstream>
 #include <utility>
 
+#if __ANDROID_API__ >= 9
+#include <strstream>
+
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/macros.h"
+#include "sherpa-onnx/csrc/onnx-utils.h"
 #include "sherpa-onnx/csrc/text-utils.h"
 
 namespace sherpa_onnx {
@@ -22,11 +30,9 @@ static void ToLowerCase(std::string *in_out) {
 
 // Note: We don't use SymbolTable here since tokens may contain a blank
 // in the first column
-static std::unordered_map<std::string, int32_t> ReadTokens(
-    const std::string &tokens) {
+static std::unordered_map<std::string, int32_t> ReadTokens(std::istream &is) {
   std::unordered_map<std::string, int32_t> token2id;
 
-  std::ifstream is(tokens);
   std::string line;
 
   std::string sym;
@@ -80,11 +86,43 @@ Lexicon::Lexicon(const std::string &lexicon, const std::string &tokens,
                  bool debug /*= false*/)
     : debug_(debug) {
   InitLanguage(language);
-  InitTokens(tokens);
-  InitLexicon(lexicon);
+
+  {
+    std::ifstream is(tokens);
+    InitTokens(is);
+  }
+
+  {
+    std::ifstream is(lexicon);
+    InitLexicon(is);
+  }
+
   InitPunctuations(punctuations);
 }
 
+#if __ANDROID_API__ >= 9
+Lexicon::Lexicon(AAssetManager *mgr, const std::string &lexicon,
+                 const std::string &tokens, const std::string &punctuations,
+                 const std::string &language, bool debug /*= false*/)
+    : debug_(debug) {
+  InitLanguage(language);
+
+  {
+    auto buf = ReadFile(mgr, tokens);
+    std::istrstream is(buf.data(), buf.size());
+    InitTokens(is);
+  }
+
+  {
+    auto buf = ReadFile(mgr, lexicon);
+    std::istrstream is(buf.data(), buf.size());
+    InitLexicon(is);
+  }
+
+  InitPunctuations(punctuations);
+}
+#endif
+
 std::vector<int64_t> Lexicon::ConvertTextToTokenIds(
     const std::string &text) const {
   switch (language_) {
@@ -192,9 +230,7 @@ std::vector<int64_t> Lexicon::ConvertTextToTokenIdsEnglish(
   return ans;
 }
 
-void Lexicon::InitTokens(const std::string &tokens) {
-  token2id_ = ReadTokens(tokens);
-}
+void Lexicon::InitTokens(std::istream &is) { token2id_ = ReadTokens(is); }
 
 void Lexicon::InitLanguage(const std::string &_lang) {
   std::string lang(_lang);
@@ -209,9 +245,7 @@ void Lexicon::InitLanguage(const std::string &_lang) {
   }
 }
 
-void Lexicon::InitLexicon(const std::string &lexicon) {
-  std::ifstream is(lexicon);
-
+void Lexicon::InitLexicon(std::istream &is) {
   std::string word;
   std::vector<std::string> token_list;
   std::string line;

sherpa-onnx/csrc/lexicon.h

@@ -6,11 +6,17 @@
 #define SHERPA_ONNX_CSRC_LEXICON_H_
 
 #include <cstdint>
+#include <iostream>
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 namespace sherpa_onnx {
 
 // TODO(fangjun): Refactor it to an abstract class
@@ -20,6 +26,12 @@ class Lexicon {
           const std::string &punctuations, const std::string &language,
           bool debug = false);
 
+#if __ANDROID_API__ >= 9
+  Lexicon(AAssetManager *mgr, const std::string &lexicon,
+          const std::string &tokens, const std::string &punctuations,
+          const std::string &language, bool debug = false);
+#endif
+
   std::vector<int64_t> ConvertTextToTokenIds(const std::string &text) const;
 
  private:
@@ -30,8 +42,8 @@ class Lexicon {
       const std::string &text) const;
 
   void InitLanguage(const std::string &lang);
-  void InitTokens(const std::string &tokens);
-  void InitLexicon(const std::string &lexicon);
+  void InitTokens(std::istream &is);
+  void InitLexicon(std::istream &is);
   void InitPunctuations(const std::string &punctuations);
 
  private:

sherpa-onnx/csrc/offline-tts-impl.cc

@@ -16,4 +16,12 @@ std::unique_ptr<OfflineTtsImpl> OfflineTtsImpl::Create(
   return std::make_unique<OfflineTtsVitsImpl>(config);
 }
 
+#if __ANDROID_API__ >= 9
+std::unique_ptr<OfflineTtsImpl> OfflineTtsImpl::Create(
+    AAssetManager *mgr, const OfflineTtsConfig &config) {
+  // TODO(fangjun): Support other types
+  return std::make_unique<OfflineTtsVitsImpl>(mgr, config);
+}
+#endif
+
 }  // namespace sherpa_onnx

sherpa-onnx/csrc/offline-tts-impl.h

@@ -8,6 +8,11 @@
 #include <memory>
 #include <string>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/offline-tts.h"
 
 namespace sherpa_onnx {
@@ -18,6 +23,11 @@ class OfflineTtsImpl {
 
   static std::unique_ptr<OfflineTtsImpl> Create(const OfflineTtsConfig &config);
 
+#if __ANDROID_API__ >= 9
+  static std::unique_ptr<OfflineTtsImpl> Create(AAssetManager *mgr,
+                                                const OfflineTtsConfig &config);
+#endif
+
   virtual GeneratedAudio Generate(const std::string &text, int64_t sid = 0,
                                   float speed = 1.0) const = 0;
 };

sherpa-onnx/csrc/offline-tts-vits-impl.h

@@ -9,6 +9,11 @@
 #include <utility>
 #include <vector>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/lexicon.h"
 #include "sherpa-onnx/csrc/macros.h"
 #include "sherpa-onnx/csrc/offline-tts-impl.h"
@@ -24,6 +29,14 @@ class OfflineTtsVitsImpl : public OfflineTtsImpl {
                  model_->Punctuations(), model_->Language(),
                  config.model.debug) {}
 
+#if __ANDROID_API__ >= 9
+  OfflineTtsVitsImpl(AAssetManager *mgr, const OfflineTtsConfig &config)
+      : model_(std::make_unique<OfflineTtsVitsModel>(mgr, config.model)),
+        lexicon_(mgr, config.model.vits.lexicon, config.model.vits.tokens,
+                 model_->Punctuations(), model_->Language(),
+                 config.model.debug) {}
+#endif
+
   GeneratedAudio Generate(const std::string &text, int64_t sid = 0,
                           float speed = 1.0) const override {
     int32_t num_speakers = model_->NumSpeakers();