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

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

@@ -0,0 +1,32 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class GeneratedAudio {
+    static {
+        System.loadLibrary("sherpa-onnx-jni");
+    }
+
+    private final float[] samples;
+    private final int sampleRate;
+
+    public GeneratedAudio(float[] samples, int sampleRate) {
+        this.samples = samples;
+        this.sampleRate = sampleRate;
+    }
+
+    public int getSampleRate() {
+        return sampleRate;
+    }
+
+    public float[] getSamples() {
+        return samples;
+    }
+
+    // return true if saved successfully.
+    public boolean save(String filename) {
+        return saveImpl(filename, samples, sampleRate);
+    }
+
+    private native boolean saveImpl(String filename, float[] samples, int sampleRate);
+}

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

@@ -0,0 +1,53 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflineTts {
+    static {
+        System.loadLibrary("sherpa-onnx-jni");
+    }
+
+    private long ptr = 0; // this is the asr engine ptrss
+
+    public OfflineTts(OfflineTtsConfig config) {
+        ptr = newFromFile(config);
+    }
+
+    public GeneratedAudio generate(String text) {
+        return generate(text, 0, 1.0f);
+    }
+
+    public GeneratedAudio generate(String text, int sid) {
+        return generate(text, sid, 1.0f);
+    }
+
+    public GeneratedAudio generate(String text, int sid, float speed) {
+        Object[] arr = generateImpl(ptr, text, sid, speed);
+        float[] samples = (float[]) arr[0];
+        int sampleRate = (int) arr[1];
+        return new GeneratedAudio(samples, sampleRate);
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        release();
+    }
+
+    public void release() {
+        if (this.ptr == 0) {
+            return;
+        }
+        delete(this.ptr);
+        this.ptr = 0;
+    }
+
+    private native void delete(long ptr);
+
+    private native int getSampleRate(long ptr);
+
+    private native int getNumSpeakers(long ptr);
+
+    private native Object[] generateImpl(long ptr, String text, int sid, float speed);
+
+    private native long newFromFile(OfflineTtsConfig config);
+}

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

@@ -0,0 +1,68 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflineTtsConfig {
+    private final OfflineTtsModelConfig model;
+    private final String ruleFsts;
+    private final String ruleFars;
+    private final int maxNumSentences;
+
+    private OfflineTtsConfig(Builder builder) {
+        this.model = builder.model;
+        this.ruleFsts = builder.ruleFsts;
+        this.ruleFars = builder.ruleFars;
+        this.maxNumSentences = builder.maxNumSentences;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public OfflineTtsModelConfig getModel() {
+        return model;
+    }
+
+    public String getRuleFsts() {
+        return ruleFsts;
+    }
+
+    public String getRuleFars() {
+        return ruleFars;
+    }
+
+    public int getMaxNumSentences() {
+        return maxNumSentences;
+    }
+
+    public static class Builder {
+        private OfflineTtsModelConfig model = OfflineTtsModelConfig.builder().build();
+        private String ruleFsts = "";
+        private String ruleFars = "";
+        private int maxNumSentences = 1;
+
+        public OfflineTtsConfig build() {
+            return new OfflineTtsConfig(this);
+        }
+
+        public Builder setModel(OfflineTtsModelConfig model) {
+            this.model = model;
+            return this;
+        }
+
+        public Builder setRuleFsts(String ruleFsts) {
+            this.ruleFsts = ruleFsts;
+            return this;
+        }
+
+        public Builder setRuleFars(String ruleFars) {
+            this.ruleFars = ruleFars;
+            return this;
+        }
+
+        public Builder setMaxNumSentences(int maxNumSentences) {
+            this.maxNumSentences = maxNumSentences;
+            return this;
+        }
+    }
+}

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;
+        }
+    }
+}

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

@@ -0,0 +1,116 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class OfflineTtsVitsModelConfig {
+    private final String model;
+    private final String lexicon;
+    private final String tokens;
+    private final String dataDir;
+    private final String dictDir;
+    private final float noiseScale;
+    private final float noiseScaleW;
+    private final float lengthScale;
+
+    private OfflineTtsVitsModelConfig(Builder builder) {
+        this.model = builder.model;
+        this.lexicon = builder.lexicon;
+        this.tokens = builder.tokens;
+        this.dataDir = builder.dataDir;
+        this.dictDir = builder.dictDir;
+        this.noiseScale = builder.noiseScale;
+        this.noiseScaleW = builder.noiseScaleW;
+        this.lengthScale = builder.lengthScale;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public String getModel() {
+        return model;
+    }
+
+    public String getLexicon() {
+        return lexicon;
+    }
+
+    public String getTokens() {
+        return tokens;
+    }
+
+    public String getDataDir() {
+        return dataDir;
+    }
+
+    public String getDictDir() {
+        return dictDir;
+    }
+
+    public float getLengthScale() {
+        return lengthScale;
+    }
+
+    public float getNoiseScale() {
+        return noiseScale;
+    }
+
+    public float getNoiseScaleW() {
+        return noiseScaleW;
+    }
+
+    public static class Builder {
+        private String model;
+        private String lexicon = "";
+        private String tokens;
+        private String dataDir = "";
+        private String dictDir = "";
+        private float noiseScale = 0.667f;
+        private float noiseScaleW = 0.8f;
+        private float lengthScale = 1.0f;
+
+        public OfflineTtsVitsModelConfig build() {
+            return new OfflineTtsVitsModelConfig(this);
+        }
+
+        public Builder setModel(String model) {
+            this.model = model;
+            return this;
+        }
+
+        public Builder setTokens(String tokens) {
+            this.tokens = tokens;
+            return this;
+        }
+
+        public Builder setLexicon(String lexicon) {
+            this.lexicon = lexicon;
+            return this;
+        }
+
+        public Builder setDataDir(String dataDir) {
+            this.dataDir = dataDir;
+            return this;
+        }
+
+        public Builder setDictDir(String dictDir) {
+            this.dictDir = dictDir;
+            return this;
+        }
+
+        public Builder setNoiseScale(float noiseScale) {
+            this.noiseScale = noiseScale;
+            return this;
+        }
+
+        public Builder setNoiseScaleW(float noiseScaleW) {
+            this.noiseScaleW = noiseScaleW;
+            return this;
+        }
+
+        public Builder setLengthScale(float lengthScale) {
+            this.lengthScale = lengthScale;
+            return this;
+        }
+    }
+}

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

@@ -1,4 +1,5 @@
 // Copyright 2024 Xiaomi Corporation
+
 package com.k2fsa.sherpa.onnx;
 
 public class WaveReader {