无法使用node-gypC ++编译STK综合工具包

问题描述

我正在尝试使用Electron创建音频软件（DAW），以创建窗口，并使用c ++播放音频/生成音频/应用音频效果。

我一直在寻找一个简单，功能强大且跨平台的库来播放和处理音频，我发现The Synthesis Toolkit对此感到非常满意。

这是代码（来自STK演示程序）：

#include "BeeThree.h"
#include "RtAudio.h"
using namespace stk;

// The TickData structure holds all the class instances and data that
// are shared by the varIoUs processing functions.
struct TickData {
  Instrmnt *instrument;
  StkFloat frequency;
  StkFloat scaler;
  long counter;
  bool done;

  // Default constructor.
  TickData()
    : instrument(0),scaler(1.0),counter(0),done( false ) {}
};

// This tick() function handles sample computation only.  It will be
// called automatically when the system needs a new buffer of audio
// samples.
int tick( void *outputBuffer,void *inputBuffer,unsigned int nBufferFrames,double streamTime,RtAudioStreamStatus status,void *userData )
{
  TickData *data = (TickData *) userData;
  register StkFloat *samples = (StkFloat *) outputBuffer;

  for ( unsigned int i=0; i<nBufferFrames; i++ ) {
    *samples++ = data->instrument->tick();
    if ( ++data->counter % 2000 == 0 ) {
      data->scaler += 0.025;
      data->instrument->setFrequency( data->frequency * data->scaler );
    }
  }

  if ( data->counter > 80000 )
    data->done = true;

  return 0;
}

int main()
{
  // Set the global sample rate and rawwave path before creating class instances.
  Stk::setSampleRate( 44100.0 );
  Stk::setRawwavePath("./engine/rawwaves/");

  TickData data;
  RtAudio dac;

  // figure out how many bytes in an StkFloat and setup the RtAudio stream.
  RtAudio::StreamParameters parameters;
  parameters.deviceid = dac.getDefaultOutputDevice();
  parameters.nChannels = 1;
  RtAudioFormat format = ( sizeof(StkFloat) == 8 ) ? RTAUdio_FLOAT64 : RTAUdio_FLOAT32;
  unsigned int bufferFrames = RT_BUFFER_SIZE;
  try {
    dac.openStream( &parameters,NULL,format,(unsigned int)Stk::sampleRate(),&bufferFrames,&tick,(void *)&data );
  }
  catch ( RtAudioError& error ) {
    error.printMessage();
    goto cleanup;
  }

  try {
    // Define and load the BeeThree instrument
    data.instrument = new BeeThree();
  }
  catch ( StkError & ) {
    goto cleanup;
  }

  data.frequency = 220.0;
  data.instrument->noteOn( data.frequency,0.5 );

  try {
    dac.startStream();
  }
  catch ( RtAudioError &error ) {
    error.printMessage();
    goto cleanup;
  }

  // Block waiting until callback signals done.
  std::cin.get();
  data.scaler = 0.025;
  std::cin.get();
  data.scaler = -1;
  std::cin.get();
  
  // Shut down the callback and output stream.
  try {
    dac.closeStream();
  }
  catch ( RtAudioError &error ) {
    error.printMessage();
  }

 cleanup:
  delete data.instrument;

  return 0;
}

我设法使用以下命令用g ++编译了这个简单的演示程序：

g++ -D__LITTLE_ENDIAN__ -D__LINUX_ALSA__ ./engine/engine.cpp -o ./engine/engi -I./engine/include/ -L./engine/lib/ -lstk -lpthread -lasound -lm

但是随后我尝试使用 node-gyp 将其编译为engine.node文件，出现此错误：

paulux@Paulux-Laptop:~/Documents/Code/FyneWav$ node-gyp build
/usr/bin/ld : can't find -lstk
collect2: error: ld returned 1 exit status

这是我的binding.gyp文件：

{
    "targets": [
        {
            "target_name": "engine","sources": ["./engine/engine.cpp"],"cflags_cc" :["-fexceptions"],"include_dirs": [
                "./engine/include/"
            ],'link_settings': {
                "libraries": [
                    "-lpthread","-lasound","-lm","-L./engine/lib/","-lstk"
                ],},"defines": [
                "__LITTLE_ENDIAN__","__LINUX_ALSA__"
            ]
        }
    ]
}

我的文件夹如下：

root
|- package-lock.json
|- package.json
|- README.md
|- binding.gyp
|- 10.1.4 (includes for v8 NodeJS addon)
|- engine
   |- engine.cpp
   |- include (all include files from *STK/include* archive)
   |- lib
      |- libstk.a (lib from the *STK/src/Release* archive)

我尝试不链接stk文件中的binding.gyp，但随后将engine.node模块加载到电子中，我得到了：

Uncaught Error: /home/paulux/Documents/Code/FyneWav/build/Release/engine.node:
undefined symbol: _ZN3stk3Stk17sampleRateChangedEdd

因此，问题是： 如何在node-gyp中链接stk，如果不能，如何使用其他编译器（例如g ++）来制作engine.node文件？

解决方法

最后！我一个人发现了！

答案真的很愚蠢：在我的binding.gyp文件中，我只需要替换

-L./engine/include由

-L/home/paulux/Documents/Code/fynewav/engine/include。

我只需要从相对路径更改为绝对路径...

花了我一天的时间才解决...

我讨厌自己=）