jni.cc
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// sherpa-onnx/jni/jni.cc
//
// Copyright (c) 2022-2023 Xiaomi Corporation
// 2022 Pingfeng Luo
// 2023 Zhaoming
#include <fstream>
#include "sherpa-onnx/csrc/macros.h"
#include "sherpa-onnx/csrc/onnx-utils.h"
#include "sherpa-onnx/csrc/wave-writer.h"
#include "sherpa-onnx/jni/common.h"
// see
// https://stackoverflow.com/questions/29043872/android-jni-return-multiple-variables
jobject NewInteger(JNIEnv *env, int32_t value) {
jclass cls = env->FindClass("java/lang/Integer");
jmethodID constructor = env->GetMethodID(cls, "<init>", "(I)V");
return env->NewObject(cls, constructor, value);
}
jobject NewFloat(JNIEnv *env, float value) {
jclass cls = env->FindClass("java/lang/Float");
jmethodID constructor = env->GetMethodID(cls, "<init>", "(F)V");
return env->NewObject(cls, constructor, value);
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT jboolean JNICALL Java_com_k2fsa_sherpa_onnx_GeneratedAudio_saveImpl(
JNIEnv *env, jobject /*obj*/, jstring filename, jfloatArray samples,
jint sample_rate) {
const char *p_filename = env->GetStringUTFChars(filename, nullptr);
jfloat *p = env->GetFloatArrayElements(samples, nullptr);
jsize n = env->GetArrayLength(samples);
bool ok = sherpa_onnx::WriteWave(p_filename, sample_rate, p, n);
env->ReleaseStringUTFChars(filename, p_filename);
env->ReleaseFloatArrayElements(samples, p, JNI_ABORT);
return ok;
}
#if 0
SHERPA_ONNX_EXTERN_C
JNIEXPORT void JNICALL
Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_decodeStreams(JNIEnv *env,
jobject /*obj*/,
jlong ptr,
jlongArray ss_ptr,
jint stream_size) {
sherpa_onnx::OnlineRecognizer *model =
reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
jlong *p = env->GetLongArrayElements(ss_ptr, nullptr);
jsize n = env->GetArrayLength(ss_ptr);
std::vector<sherpa_onnx::OnlineStream *> p_ss(n);
for (int32_t i = 0; i != n; ++i) {
p_ss[i] = reinterpret_cast<sherpa_onnx::OnlineStream *>(p[i]);
}
model->DecodeStreams(p_ss.data(), n);
env->ReleaseLongArrayElements(ss_ptr, p, JNI_ABORT);
}
#endif