wave-reader.cc
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// sherpa-onnx/jni/wave-reader.cc
//
// Copyright (c) 2024 Xiaomi Corporation
#include "sherpa-onnx/csrc/wave-reader.h"
#include <fstream>
#include "sherpa-onnx/csrc/file-utils.h"
#include "sherpa-onnx/csrc/macros.h"
#include "sherpa-onnx/jni/common.h"
static jobjectArray ReadWaveImpl(JNIEnv *env, std::istream &is,
const char *p_filename) {
bool is_ok = false;
int32_t sampling_rate = -1;
std::vector<float> samples =
sherpa_onnx::ReadWave(is, &sampling_rate, &is_ok);
if (!is_ok) {
SHERPA_ONNX_LOGE("Failed to read '%s'", p_filename);
jclass exception_class = env->FindClass("java/lang/Exception");
env->ThrowNew(exception_class, "Failed to read wave file.");
return nullptr;
}
jfloatArray samples_arr = env->NewFloatArray(samples.size());
env->SetFloatArrayRegion(samples_arr, 0, samples.size(), samples.data());
jobjectArray obj_arr = (jobjectArray)env->NewObjectArray(
2, env->FindClass("java/lang/Object"), nullptr);
env->SetObjectArrayElement(obj_arr, 0, samples_arr);
env->SetObjectArrayElement(obj_arr, 1, NewInteger(env, sampling_rate));
return obj_arr;
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT jobjectArray JNICALL
Java_com_k2fsa_sherpa_onnx_WaveReader_00024Companion_readWaveFromFile(
JNIEnv *env, jclass /*cls*/, jstring filename) {
const char *p_filename = env->GetStringUTFChars(filename, nullptr);
std::ifstream is(p_filename, std::ios::binary);
auto obj_arr = ReadWaveImpl(env, is, p_filename);
env->ReleaseStringUTFChars(filename, p_filename);
return obj_arr;
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT jobjectArray JNICALL
Java_com_k2fsa_sherpa_onnx_WaveReader_readWaveFromFile(JNIEnv *env,
jclass /*obj*/,
jstring filename) {
return Java_com_k2fsa_sherpa_onnx_WaveReader_00024Companion_readWaveFromFile(
env, nullptr, filename);
}
SHERPA_ONNX_EXTERN_C
JNIEXPORT jobjectArray JNICALL
Java_com_k2fsa_sherpa_onnx_WaveReader_00024Companion_readWaveFromAsset(
JNIEnv *env, jclass /*cls*/, jobject asset_manager, jstring filename) {
const char *p_filename = env->GetStringUTFChars(filename, nullptr);
#if __ANDROID_API__ >= 9
AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
if (!mgr) {
SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
exit(-1);
}
std::vector<char> buffer = sherpa_onnx::ReadFile(mgr, p_filename);
std::istrstream is(buffer.data(), buffer.size());
#else
std::ifstream is(p_filename, std::ios::binary);
#endif
auto obj_arr = ReadWaveImpl(env, is, p_filename);
env->ReleaseStringUTFChars(filename, p_filename);
return obj_arr;
}