online-recognizer.cc
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// sherpa-onnx/jni/online-recognizer.cc
//
// Copyright (c) 2024 Xiaomi Corporation
#include "sherpa-onnx/csrc/online-recognizer.h"
#include "sherpa-onnx/csrc/macros.h"
#include "sherpa-onnx/jni/common.h"
namespace sherpa_onnx {
static OnlineRecognizerConfig GetConfig(JNIEnv *env, jobject config) {
OnlineRecognizerConfig ans;
jclass cls = env->GetObjectClass(config);
jfieldID fid;
// https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/types.html
// https://courses.cs.washington.edu/courses/cse341/99wi/java/tutorial/native1.1/implementing/field.html
//---------- decoding ----------
fid = env->GetFieldID(cls, "decodingMethod", "Ljava/lang/String;");
jstring s = (jstring)env->GetObjectField(config, fid);
const char *p = env->GetStringUTFChars(s, nullptr);
ans.decoding_method = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(cls, "maxActivePaths", "I");
ans.max_active_paths = env->GetIntField(config, fid);
fid = env->GetFieldID(cls, "hotwordsFile", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.hotwords_file = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(cls, "hotwordsScore", "F");
ans.hotwords_score = env->GetFloatField(config, fid);
//---------- feat config ----------
fid = env->GetFieldID(cls, "featConfig",
"Lcom/k2fsa/sherpa/onnx/FeatureConfig;");
jobject feat_config = env->GetObjectField(config, fid);
jclass feat_config_cls = env->GetObjectClass(feat_config);
fid = env->GetFieldID(feat_config_cls, "sampleRate", "I");
ans.feat_config.sampling_rate = env->GetIntField(feat_config, fid);
fid = env->GetFieldID(feat_config_cls, "featureDim", "I");
ans.feat_config.feature_dim = env->GetIntField(feat_config, fid);
//---------- enable endpoint ----------
fid = env->GetFieldID(cls, "enableEndpoint", "Z");
ans.enable_endpoint = env->GetBooleanField(config, fid);
//---------- endpoint_config ----------
fid = env->GetFieldID(cls, "endpointConfig",
"Lcom/k2fsa/sherpa/onnx/EndpointConfig;");
jobject endpoint_config = env->GetObjectField(config, fid);
jclass endpoint_config_cls = env->GetObjectClass(endpoint_config);
fid = env->GetFieldID(endpoint_config_cls, "rule1",
"Lcom/k2fsa/sherpa/onnx/EndpointRule;");
jobject rule1 = env->GetObjectField(endpoint_config, fid);
jclass rule_class = env->GetObjectClass(rule1);
fid = env->GetFieldID(endpoint_config_cls, "rule2",
"Lcom/k2fsa/sherpa/onnx/EndpointRule;");
jobject rule2 = env->GetObjectField(endpoint_config, fid);
fid = env->GetFieldID(endpoint_config_cls, "rule3",
"Lcom/k2fsa/sherpa/onnx/EndpointRule;");
jobject rule3 = env->GetObjectField(endpoint_config, fid);
fid = env->GetFieldID(rule_class, "mustContainNonSilence", "Z");
ans.endpoint_config.rule1.must_contain_nonsilence =
env->GetBooleanField(rule1, fid);
ans.endpoint_config.rule2.must_contain_nonsilence =
env->GetBooleanField(rule2, fid);
ans.endpoint_config.rule3.must_contain_nonsilence =
env->GetBooleanField(rule3, fid);
fid = env->GetFieldID(rule_class, "minTrailingSilence", "F");
ans.endpoint_config.rule1.min_trailing_silence =
env->GetFloatField(rule1, fid);
ans.endpoint_config.rule2.min_trailing_silence =
env->GetFloatField(rule2, fid);
ans.endpoint_config.rule3.min_trailing_silence =
env->GetFloatField(rule3, fid);
fid = env->GetFieldID(rule_class, "minUtteranceLength", "F");
ans.endpoint_config.rule1.min_utterance_length =
env->GetFloatField(rule1, fid);
ans.endpoint_config.rule2.min_utterance_length =
env->GetFloatField(rule2, fid);
ans.endpoint_config.rule3.min_utterance_length =
env->GetFloatField(rule3, fid);
//---------- model config ----------
fid = env->GetFieldID(cls, "modelConfig",
"Lcom/k2fsa/sherpa/onnx/OnlineModelConfig;");
jobject model_config = env->GetObjectField(config, fid);
jclass model_config_cls = env->GetObjectClass(model_config);
// transducer
fid = env->GetFieldID(model_config_cls, "transducer",
"Lcom/k2fsa/sherpa/onnx/OnlineTransducerModelConfig;");
jobject transducer_config = env->GetObjectField(model_config, fid);
jclass transducer_config_cls = env->GetObjectClass(transducer_config);
fid = env->GetFieldID(transducer_config_cls, "encoder", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(transducer_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.transducer.encoder = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(transducer_config_cls, "decoder", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(transducer_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.transducer.decoder = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(transducer_config_cls, "joiner", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(transducer_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.transducer.joiner = p;
env->ReleaseStringUTFChars(s, p);
// paraformer
fid = env->GetFieldID(model_config_cls, "paraformer",
"Lcom/k2fsa/sherpa/onnx/OnlineParaformerModelConfig;");
jobject paraformer_config = env->GetObjectField(model_config, fid);
jclass paraformer_config_cls = env->GetObjectClass(paraformer_config);
fid = env->GetFieldID(paraformer_config_cls, "encoder", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(paraformer_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.paraformer.encoder = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(paraformer_config_cls, "decoder", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(paraformer_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.paraformer.decoder = p;
env->ReleaseStringUTFChars(s, p);
// streaming zipformer2 CTC
fid =
env->GetFieldID(model_config_cls, "zipformer2Ctc",
"Lcom/k2fsa/sherpa/onnx/OnlineZipformer2CtcModelConfig;");
jobject zipformer2_ctc_config = env->GetObjectField(model_config, fid);
jclass zipformer2_ctc_config_cls = env->GetObjectClass(zipformer2_ctc_config);
fid =
env->GetFieldID(zipformer2_ctc_config_cls, "model", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(zipformer2_ctc_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.zipformer2_ctc.model = p;
env->ReleaseStringUTFChars(s, p);
// streaming NeMo CTC
fid = env->GetFieldID(model_config_cls, "neMoCtc",
"Lcom/k2fsa/sherpa/onnx/OnlineNeMoCtcModelConfig;");
jobject nemo_ctc_config = env->GetObjectField(model_config, fid);
jclass nemo_ctc_config_cls = env->GetObjectClass(nemo_ctc_config);
fid = env->GetFieldID(nemo_ctc_config_cls, "model", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(nemo_ctc_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.nemo_ctc.model = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(model_config_cls, "tokens", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(model_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.tokens = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(model_config_cls, "numThreads", "I");
ans.model_config.num_threads = env->GetIntField(model_config, fid);
fid = env->GetFieldID(model_config_cls, "debug", "Z");
ans.model_config.debug = env->GetBooleanField(model_config, fid);
fid = env->GetFieldID(model_config_cls, "provider", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(model_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.provider = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(model_config_cls, "modelType", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(model_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.model_type = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(model_config_cls, "modelingUnit", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(model_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.modeling_unit = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(model_config_cls, "bpeVocab", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(model_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.model_config.bpe_vocab = p;
env->ReleaseStringUTFChars(s, p);
//---------- rnn lm model config ----------
fid = env->GetFieldID(cls, "lmConfig",
"Lcom/k2fsa/sherpa/onnx/OnlineLMConfig;");
jobject lm_model_config = env->GetObjectField(config, fid);
jclass lm_model_config_cls = env->GetObjectClass(lm_model_config);
fid = env->GetFieldID(lm_model_config_cls, "model", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(lm_model_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.lm_config.model = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(lm_model_config_cls, "scale", "F");
ans.lm_config.scale = env->GetFloatField(lm_model_config, fid);
fid = env->GetFieldID(cls, "ctcFstDecoderConfig",
"Lcom/k2fsa/sherpa/onnx/OnlineCtcFstDecoderConfig;");
jobject fst_decoder_config = env->GetObjectField(config, fid);
jclass fst_decoder_config_cls = env->GetObjectClass(fst_decoder_config);
fid = env->GetFieldID(fst_decoder_config_cls, "graph", "Ljava/lang/String;");
s = (jstring)env->GetObjectField(fst_decoder_config, fid);
p = env->GetStringUTFChars(s, nullptr);
ans.ctc_fst_decoder_config.graph = p;
env->ReleaseStringUTFChars(s, p);
fid = env->GetFieldID(fst_decoder_config_cls, "maxActive", "I");
ans.ctc_fst_decoder_config.max_active =
env->GetIntField(fst_decoder_config, fid);
return ans;
}
} // namespace sherpa_onnx
SHERPA_ONNX_EXTERN_C
JNIEXPORT jlong JNICALL
Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_newFromAsset(JNIEnv *env,
jobject /*obj*/,
jobject asset_manager,
jobject _config) {
#if __ANDROID_API__ >= 9
AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
if (!mgr) {
SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
}
#endif
auto config = sherpa_onnx::GetConfig(env, _config);
SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
auto recognizer = new sherpa_onnx::OnlineRecognizer(
#if __ANDROID_API__ >= 9
mgr,
#endif
config);
return (jlong)recognizer;
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT jlong JNICALL Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_newFromFile(
JNIEnv *env, jobject /*obj*/, jobject _config) {
auto config = sherpa_onnx::GetConfig(env, _config);
SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
if (!config.Validate()) {
SHERPA_ONNX_LOGE("Errors found in config!");
return 0;
}
auto recognizer = new sherpa_onnx::OnlineRecognizer(config);
return (jlong)recognizer;
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT void JNICALL Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_delete(
JNIEnv *env, jobject /*obj*/, jlong ptr) {
delete reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT void JNICALL Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_reset(
JNIEnv *env, jobject /*obj*/, jlong ptr, jlong stream_ptr) {
auto recognizer = reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
auto stream = reinterpret_cast<sherpa_onnx::OnlineStream *>(stream_ptr);
recognizer->Reset(stream);
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT bool JNICALL Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_isReady(
JNIEnv *env, jobject /*obj*/, jlong ptr, jlong stream_ptr) {
auto recognizer = reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
auto stream = reinterpret_cast<sherpa_onnx::OnlineStream *>(stream_ptr);
return recognizer->IsReady(stream);
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT bool JNICALL Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_isEndpoint(
JNIEnv *env, jobject /*obj*/, jlong ptr, jlong stream_ptr) {
auto recognizer = reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
auto stream = reinterpret_cast<sherpa_onnx::OnlineStream *>(stream_ptr);
return recognizer->IsEndpoint(stream);
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT void JNICALL Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_decode(
JNIEnv *env, jobject /*obj*/, jlong ptr, jlong stream_ptr) {
auto recognizer = reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
auto stream = reinterpret_cast<sherpa_onnx::OnlineStream *>(stream_ptr);
recognizer->DecodeStream(stream);
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT jlong JNICALL
Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_createStream(JNIEnv *env,
jobject /*obj*/,
jlong ptr,
jstring hotwords) {
auto recognizer = reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
const char *p = env->GetStringUTFChars(hotwords, nullptr);
std::unique_ptr<sherpa_onnx::OnlineStream> stream;
if (strlen(p) == 0) {
stream = recognizer->CreateStream();
} else {
stream = recognizer->CreateStream(p);
}
env->ReleaseStringUTFChars(hotwords, p);
// The user is responsible to free the returned pointer.
//
// See Java_com_k2fsa_sherpa_onnx_OfflineStream_delete() from
// ./offline-stream.cc
sherpa_onnx::OnlineStream *ans = stream.release();
return (jlong)ans;
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT jobjectArray JNICALL
Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_getResult(JNIEnv *env,
jobject /*obj*/,
jlong ptr,
jlong stream_ptr) {
auto recognizer = reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
auto stream = reinterpret_cast<sherpa_onnx::OnlineStream *>(stream_ptr);
sherpa_onnx::OnlineRecognizerResult result = recognizer->GetResult(stream);
// [0]: text, jstring
// [1]: tokens, array of jstring
// [2]: timestamps, array of float
jobjectArray obj_arr = (jobjectArray)env->NewObjectArray(
3, env->FindClass("java/lang/Object"), nullptr);
jstring text = env->NewStringUTF(result.text.c_str());
env->SetObjectArrayElement(obj_arr, 0, text);
jobjectArray tokens_arr = (jobjectArray)env->NewObjectArray(
result.tokens.size(), env->FindClass("java/lang/String"), nullptr);
int32_t i = 0;
for (const auto &t : result.tokens) {
jstring jtext = env->NewStringUTF(t.c_str());
env->SetObjectArrayElement(tokens_arr, i, jtext);
i += 1;
}
env->SetObjectArrayElement(obj_arr, 1, tokens_arr);
jfloatArray timestamps_arr = env->NewFloatArray(result.timestamps.size());
env->SetFloatArrayRegion(timestamps_arr, 0, result.timestamps.size(),
result.timestamps.data());
env->SetObjectArrayElement(obj_arr, 2, timestamps_arr);
return obj_arr;
}