130 lines
4.2 KiB
C++
130 lines
4.2 KiB
C++
// sherpa-onnx/jni/jni.cc
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//
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// Copyright (c) 2022-2023 Xiaomi Corporation
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// 2022 Pingfeng Luo
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// 2023 Zhaoming
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#include <fstream>
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#include "sherpa-onnx/csrc/macros.h"
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#include "sherpa-onnx/csrc/onnx-utils.h"
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#include "sherpa-onnx/csrc/wave-reader.h"
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#include "sherpa-onnx/csrc/wave-writer.h"
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#include "sherpa-onnx/jni/common.h"
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// see
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// https://stackoverflow.com/questions/29043872/android-jni-return-multiple-variables
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jobject NewInteger(JNIEnv *env, int32_t value) {
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jclass cls = env->FindClass("java/lang/Integer");
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jmethodID constructor = env->GetMethodID(cls, "<init>", "(I)V");
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return env->NewObject(cls, constructor, value);
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}
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jobject NewFloat(JNIEnv *env, float value) {
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jclass cls = env->FindClass("java/lang/Float");
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jmethodID constructor = env->GetMethodID(cls, "<init>", "(F)V");
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return env->NewObject(cls, constructor, value);
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}
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SHERPA_ONNX_EXTERN_C
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JNIEXPORT jboolean JNICALL Java_com_k2fsa_sherpa_onnx_GeneratedAudio_saveImpl(
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JNIEnv *env, jobject /*obj*/, jstring filename, jfloatArray samples,
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jint sample_rate) {
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const char *p_filename = env->GetStringUTFChars(filename, nullptr);
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jfloat *p = env->GetFloatArrayElements(samples, nullptr);
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jsize n = env->GetArrayLength(samples);
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bool ok = sherpa_onnx::WriteWave(p_filename, sample_rate, p, n);
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env->ReleaseStringUTFChars(filename, p_filename);
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env->ReleaseFloatArrayElements(samples, p, JNI_ABORT);
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return ok;
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}
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static jobjectArray ReadWaveImpl(JNIEnv *env, std::istream &is,
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const char *p_filename) {
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bool is_ok = false;
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int32_t sampling_rate = -1;
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std::vector<float> samples =
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sherpa_onnx::ReadWave(is, &sampling_rate, &is_ok);
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if (!is_ok) {
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SHERPA_ONNX_LOGE("Failed to read %s", p_filename);
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exit(-1);
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}
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jfloatArray samples_arr = env->NewFloatArray(samples.size());
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env->SetFloatArrayRegion(samples_arr, 0, samples.size(), samples.data());
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jobjectArray obj_arr = (jobjectArray)env->NewObjectArray(
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2, env->FindClass("java/lang/Object"), nullptr);
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env->SetObjectArrayElement(obj_arr, 0, samples_arr);
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env->SetObjectArrayElement(obj_arr, 1, NewInteger(env, sampling_rate));
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return obj_arr;
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}
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SHERPA_ONNX_EXTERN_C
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JNIEXPORT jobjectArray JNICALL
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Java_com_k2fsa_sherpa_onnx_WaveReader_00024Companion_readWaveFromFile(
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JNIEnv *env, jclass /*cls*/, jstring filename) {
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const char *p_filename = env->GetStringUTFChars(filename, nullptr);
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std::ifstream is(p_filename, std::ios::binary);
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auto obj_arr = ReadWaveImpl(env, is, p_filename);
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env->ReleaseStringUTFChars(filename, p_filename);
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return obj_arr;
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}
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SHERPA_ONNX_EXTERN_C
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JNIEXPORT jobjectArray JNICALL
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Java_com_k2fsa_sherpa_onnx_WaveReader_00024Companion_readWaveFromAsset(
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JNIEnv *env, jclass /*cls*/, jobject asset_manager, jstring filename) {
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const char *p_filename = env->GetStringUTFChars(filename, nullptr);
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#if __ANDROID_API__ >= 9
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AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
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if (!mgr) {
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SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
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exit(-1);
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}
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std::vector<char> buffer = sherpa_onnx::ReadFile(mgr, p_filename);
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std::istrstream is(buffer.data(), buffer.size());
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#else
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std::ifstream is(p_filename, std::ios::binary);
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#endif
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auto obj_arr = ReadWaveImpl(env, is, p_filename);
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env->ReleaseStringUTFChars(filename, p_filename);
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return obj_arr;
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}
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#if 0
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SHERPA_ONNX_EXTERN_C
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JNIEXPORT void JNICALL
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Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_decodeStreams(JNIEnv *env,
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jobject /*obj*/,
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jlong ptr,
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jlongArray ss_ptr,
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jint stream_size) {
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sherpa_onnx::OnlineRecognizer *model =
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reinterpret_cast<sherpa_onnx::OnlineRecognizer *>(ptr);
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jlong *p = env->GetLongArrayElements(ss_ptr, nullptr);
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jsize n = env->GetArrayLength(ss_ptr);
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std::vector<sherpa_onnx::OnlineStream *> p_ss(n);
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for (int32_t i = 0; i != n; ++i) {
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p_ss[i] = reinterpret_cast<sherpa_onnx::OnlineStream *>(p[i]);
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}
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model->DecodeStreams(p_ss.data(), n);
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env->ReleaseLongArrayElements(ss_ptr, p, JNI_ABORT);
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}
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#endif
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