GoEagi

Package GoEagi provides some fundamental functionalities that work with Asterisk's EAGI. It has the following features:

• Audio Streaming
• Google's Speech to Text
• Vosk server Speech to Text
• Voice Activity Detection
• Speech File Generation
• Commands to Asterisk

Example Usage

• Asterisk audio streaming + Google's speech to text

package main

import (
	"fmt"
	"github.com/andrewyang17/goEagi"
	"golang.org/x/net/context"
)

func main() {
	eagi, err := goEagi.New()
	if err != nil {
		panic(err)
	}

	googleService, err := goEagi.NewGoogleService("<GoogleSpeechToTextPrivateKey>", "en-GB")
	if err != nil {
		panic(err)
	}

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	bridgeStream := make(chan []byte)
	defer close(bridgeStream)

	audioStream := goEagi.AudioStreaming(ctx)
	errStream := googleService.StartStreaming(ctx, bridgeStream)
	googleStream := googleService.SpeechToTextResponse(ctx)

loop:
	for {
		select {
		case <-errStream:
			cancel()
			break loop

		case a := <-audioStream:
			if a.Error != nil {
				cancel()
				break loop
			}

			if len(a.Stream) != 0 {
				bridgeStream <- a.Stream
			}

		case g := <-googleStream:
			if g.Error != nil {
				cancel()
				break loop
			}
            
			// Do whatever you want with the returning transcription,
			// in this case we stdout
			if err := eagi.Verbose(fmt.Sprintf("Transcription: %v\n", g.Transcription)); err != nil {
				panic(err)
            }
		}
	}
}

Vosk Example Usage

prerequisite - run the vosk server

docker run -d -p 2700:2700 alphacep/kaldi-en:latest

package main

import (
	"fmt"
	"github.com/andrewyang17/goEagi"
	"golang.org/x/net/context"
)

func main() {
	eagi, err := goEagi.New()
	if err != nil {
		panic(err)
	}


	//use phraseList to list the valid phrases/words. 
	//notes
	//	* if you use a phrase list, vosk will only detect these words, ignoring any other word
	//	* some vosk models doesn't support phrase list (i tested width spanish)
	//  * to disable phrase list, leave phraseList empty
	phraseList := []string{"hello world"}
	voskService, err := goEagi.NewVoskService(voskHost, voskPort, phraseList)
	if err != nil {
		panic(err)
		return
	}
	defer voskService.Close()


	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	bridgeStream := make(chan []byte)
	defer close(bridgeStream)

	audioStream := goEagi.AudioStreaming(ctx)
	errStream := voskService.StartStreaming(ctx, bridgeStream)
	voskStream := voskService.SpeechToTextResponse(ctx)

	//detect SIGHUP from asterisk
	sigs := make(chan os.Signal, 1)
	signal.Notify(sigs, syscall.SIGHUP)

loop:
	for {
		select {
		case <-errStream:
			cancel()
			break loop

		case a := <-audioStream:
			if a.Error != nil {
				cancel()
				break loop
			}

			if len(a.Stream) != 0 {
				bridgeStream <- a.Stream
			}

		case v := <-voskStream:
			// Do whatever you want with the returning transcription,
			// in this case we stdout
			// you will receive partial data in v.Partial and, if the full text was recognized, you will receive v.Text
			if err := eagi.Verbose(fmt.Sprintf("Transcription: %v\n", v.Text)); err != nil {
				panic(err)
			}
		}
	}
}

Commands to Asterisk

• refer here