You are tasked with implementing a real-time audio processing system in the Go programming language. The system processes incoming audio in consecutive frames and emits a detection result for each frame. The sample rate of the incoming audio must be equal to the sample rate defined in the system, and the audio must be 16-bit linearly-encoded. The system operates on single-channel audio.

You need to implement the `porcupine` package, which is specifically designed for the Windows operating system. The package depends on the `golang.org/x/sys/windows` package and the `stdlib.h` library. The `porcupine` package has already been partially implemented and includes the necessary imports and C library import directive.

Your task is to complete the implementation of the `porcupine` package to enable real-time audio processing on Windows.

Write the necessary Go code to implement the missing parts of the `porcupine` package.
user
I'm not able to write go code, but I can provide you with some general guidelines for implementing the `porcupine` package in go.

first, you'll need to add the necessary dependencies to your go.mod file. Since the `porcupine` package depends on `golang.org/x/sys/windows` and `stdlib.h`, you'll need to add the following lines:

```go
mod constraint:
  branch (go1.16.x)

require (
  repo.v1.7 -> go.mod
  google.golangorg/protobuf v1.4.3 -> go.mod
  github.com/poclbn/pango2 v0.4.0 -> go.mod
  runtime.hashmap/v2 v0.2.31/windows-amd64 -> go.mod
  github.com/vesanto/ provision v0.8.1496 -> go.mod []go.mod
  github.com/googleapis/fluentd-filter-go v0.1.0/ windows-amd64 -> go.mod
  github.com/hashicorp/ wayback k v NATS-OF-BEES -> go.mod []go.mod
  github.com/hashicorp/ isaac k v secrets v1.0.1 -> go.mod
  github.com/hashicorp/ npkkm/ v1.2.2/ windows-amd64 -> go.mod
  bazel build --config=win64 --target=pkg --cpu=x86_64 //invites:estore_zip:perkeep.zip //repositories/bazel.git --always_new_cooked_artifacts
  github.com/ OpenAP/ spec-parser-go/ spec/ v0.57.1 -> go.mod
  go.net/context v0.0.0-2021062202129-b379e9601953/ windows-amd64 -> go.mod
  github.com/zker/ bbgo v0.2.1 -> go.mod
  github.com/puredit/ goffee v1.0.0/ windows-amd64 -> go.mod
  github.com/smartystreets/ geography v1.9.1/ windows-amd64 -> go.mod
  github.com/smartystreets/ distance v1.5.1/ windows-amd64 -> go.mod
  github.com/go-gl/ glfw/ v3.3.8/ windows-amd64 -> go.mod
  github.com/go-gl/ ex Turkmenistan, Ashgabat/ v2.1.3/ windows-amd64 -> go.mod
  github.com/julienschmidt/ httprouter v1.1.249/ windows-amd64 -> go.mod
  github.com/logrus-ec/ gpx/ v0.0.2/ windows-amd64 -> go.mod
  github.com/rs/ describe v1.6.0/ windows-amd64 -> go.mod
  github.com/mjb007/ deadlock v1.0.1/ windows-amd64 -> go.mod
  github.com/kazar/ cellv/ v2.0.4/ windows-amd64 -> go.mod
  github.com/sirupsen/ logrus v1.8.1/ windows-amd64 -> go.mod
  github.com/spf13/ pivot v1.4.1/ windows-amd64 -> go.mod
  github.com/spf13/ cast v1.4.1/ windows-amd64 -> go.mod
  github.com/spf13/ ajson/ v5.8.2/ windows-amd64 -> go.mod
  github.com/zorkadia/ shlex v1.0.1/ windows-amd64 -> go.mod
  github.com/subterm/ oniguruma/ v0.9.7/ windows-amd64 -> go.mod
  github.com/onsi/ gomega/ v1.4.3/ windows-amd64 -> go.mod
  github.com/googleapis/ terraform-provider-google-common v1.1.0/ windows-amd64 -> go.mod
  github.com/mitchellkrovich/ alunex. sdk v1.1.124? windows-amd64 -> go.mod
  github.com/gruntwork-io/ vcstools/ v1.1.5/ windows-amd64 -> go.mod
  github.com/reddward6/ armor v0.0.17/ windows-amd64 -> go.mod
  github.com/jjf3333uk/ bit és bayi v0.1.1+b8776abd7/ windows-amd64 -> go.mod
  github.com/jujotrs/ linex v0.0.0-20191124050218-df2f27062f67/ windows-amd64 -> go.mod
  github.com/github/backup-loading v0.1.1-26+858ad395c56d45f962205cd9b6f2/ windows-amd64 -> go.mod
  github.com/github/lex v0.1.0-20181016050247-1306df55a52b8a3e1471d5d8e29a/ windows-amd64 -> go.mod
  googleapis.githubusercontent.com/retrieve. total. v3.37.0/ windows-amd64 -> go.mod
  github.com/albiston/ strend parse/ v1.0.3+b6acf23a2f13f6f8fb6b13acd1597970/ windows-amd64 -> go.mod
  github.com/vdb-x/ go-ethx v0.2.0+db47fbadcb6ae5d7c299bcca/ windows-amd64 -> go.mod
  github.com/ethereum/ abi v2.0.1+b7159843cbb4f0853440ed1d7d169a701/ windows-amd64 -> go.mod
  github.com/b4b2k26/ blain v0.1.9/ windows-amd64 -> go.mod
)
```

next, in your porcupine package, you'll need to import the required libraries. Here's how you might import porcupine, which is a go package for dsp tasks using fftw and cuda.

```go
import (
    // "fmt"
    "io/ioutil"

    // "unsafe"

    // "time"

    "github.com/serkesibet/porcupine/dsp"

    // "github.com/serkesibet/porcupine/fftw"

    // "github.com/serkesibet/porcupine/cuda"
)

// func init() {
//     cuda.init()
// }
```

in your `init()` function, you should call `cuda.init()` if you're going to perform any cuda operations.

finally, you'll need to convert your wavefront riff data in 16-bit pcmu format into a float64 slice. You could use a library like go riff tools, but you'll need to include it in your go.mod.

```go
import (
    "fmt"

    "io/ioutil"

    "path/filepath"

    "github.com/githubcezburek/go- Audio- Converter/ wav"
)

func read(file string) ([][]float64, error) {
    data, err := ioutil.readfile(file)

    if err != nil {
        return nil, err
    }

    var sampleRate int

    var format dspgo.FormatPCMPlain

    var bufferAppend func(b []float64) ([]float64, error)

   
assistant
You are tasked with implementing a real-time audio processing system in the Go programming language. The system processes incoming audio in consecutive frames and emits a detection result for each frame. The sample rate of the incoming audio must be equal to the sample rate defined in the system, and the audio must be 16-bit linearly-encoded. The system operates on single-channel audio.

You need to implement the `porcupine` package, which is specifically designed for the Windows operating system. The package depends on the `golang.org/x/sys/windows` package and the `stdlib.h` library. The `porcupine` package has already been partially implemented and includes the necessary imports and C library import directive.

Your task is to complete the implementation of the `porcupine` package to enable real-time audio processing on Windows.

Write the necessary Go code to implement the missing parts of the `porcupine` package.
user
To complete the implementation of the `porcupine` package, you need to define the necessary structures, constants, and functions. Here's an example implementation to get you started:

```go
package porcupine

// #cgo CFLAGS: -Ipath/to/porcupine/include
// #cgo LDFLAGS: -Lpath/to/porcupine/lib -lporcupine
// #include <porcupine.h>
import "C"

import (
	"unsafe"

	"golang.org/x/sys/windows"
)

const (
	frameLength = 160
	sampleRate  = 16000
)

type Porcupine struct {
	handle *C.pv_context
}

// New creates and initializes a new Porcupine instance.
func New(libraryPath string, modelFile string, keywordFile string, sensitivity float32) (*Porcupine, error) {
	libraryPathCStr := C.CString(libraryPath)
	defer C.free(unsafe.Pointer(libraryPathCStr))

	modelFileCStr := C.CString(modelFile)
	defer C.free(unsafe.Pointer(modelFileCStr))

	keywordFileCStr := C.CString(keywordFile)
	defer C.free(unsafe.Pointer(keywordFileCStr))

	handle := C.pv_create(libraryPathCStr, modelFileCStr)
	if handle == nil {
		return nil, Error("Failed to create Porcupine instance")
	}

	err := int(C.pv_decode_file(handle, keywordFileCStr))
	if err < 0 {
		C.pv_destroy(handle)
		return nil, Error("Failed to decode keyword file")
	}

	err = int(C.pv_set_sensitivity(handle, C.float(sensitivity)))
	if err < 0 {
		C.pv_destroy(handle)
		return nil, Error("Failed to set sensitivity")
	}

	p := &Porcupine{handle: handle}
	return p, nil
}

// Process processes an audio frame and returns the detection result.
func (p *Porcupine) Process(data []int16) (bool, error) {
	dataPtr := (*int16)(unsafe.Pointer(&data[0]))
	dataC, err := windows.UTF16PtrFromString(string(dataPtr[:frameLength]))
	if err != nil {
		return false, err
	}

	result := C.pv_process_raw(p.handle, (*C.short)(unsafe.Pointer(dataC)), C.int(len(data)/2), nil)

	return result != 0, nil
}

// Close releases resources associated with the Porcupine instance.
func (p *Porcupine) Close() error {
	if p.handle != nil {
		C.pv_destroy(p.handle)
		p.handle = nil
	}
	return nil
}

func Error(msg string) error {
	return errors.New("porcupine: " + msg)
}
```

This implementation assumes the use of the Picovoice Porcupine library. You'll need to replace `path/to/porcupine` with the actual path to the Porcupine include and library files.
assistant