58 lines
1.7 KiB
C++
58 lines
1.7 KiB
C++
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// scripts/node-addon-api/src/wave-reader.cc
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//
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// Copyright (c) 2024 Xiaomi Corporation
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#include <sstream>
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#include "napi.h" // NOLINT
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#include "sherpa-onnx/c-api/c-api.h"
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static Napi::Object ReadWaveWrapper(const Napi::CallbackInfo &info) {
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Napi::Env env = info.Env();
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if (info.Length() != 1) {
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std::ostringstream os;
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os << "Expect only 1 argument. Given: " << info.Length();
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Napi::TypeError::New(env, os.str()).ThrowAsJavaScriptException();
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return {};
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}
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if (!info[0].IsString()) {
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Napi::TypeError::New(env, "Argument should be a string")
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.ThrowAsJavaScriptException();
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return {};
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}
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std::string filename = info[0].As<Napi::String>().Utf8Value();
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const SherpaOnnxWave *wave = SherpaOnnxReadWave(filename.c_str());
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if (!wave) {
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std::ostringstream os;
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os << "Failed to read '" << filename << "'";
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Napi::TypeError::New(env, os.str()).ThrowAsJavaScriptException();
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return {};
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}
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Napi::ArrayBuffer arrayBuffer = Napi::ArrayBuffer::New(
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env, const_cast<float *>(wave->samples),
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sizeof(float) * wave->num_samples,
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[](Napi::Env /*env*/, void * /*data*/, const SherpaOnnxWave *hint) {
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SherpaOnnxFreeWave(hint);
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},
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wave);
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Napi::Float32Array float32Array =
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Napi::Float32Array::New(env, wave->num_samples, arrayBuffer, 0);
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Napi::Object obj = Napi::Object::New(env);
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obj.Set(Napi::String::New(env, "samples"), float32Array);
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obj.Set(Napi::String::New(env, "sampleRate"), wave->sample_rate);
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return obj;
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}
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void InitWaveReader(Napi::Env env, Napi::Object exports) {
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exports.Set(Napi::String::New(env, "readWave"),
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Napi::Function::New(env, ReadWaveWrapper));
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}
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