text_to_speech.go

package gcp

import (
	"cloud.google.com/go/texttospeech/apiv1/texttospeechpb"
	"context"
	"fmt"
	"log"
	"os"
	"path/filepath"
	"time"
)

func (c *Client) GenerateAudioByText(inputText string, outputPath string, outputFileName string) (err error) {
	ctx, cancelFunc := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancelFunc()
	// Perform the text-to-speech request on the text input with the selected
	// voice parameters and audio file type.
	req := texttospeechpb.SynthesizeSpeechRequest{
		// Set the text input to be synthesized.
		Input: &texttospeechpb.SynthesisInput{
			InputSource: &texttospeechpb.SynthesisInput_Text{Text: inputText},
		},
		// Build the voice request, select the language code ("en-US") and the SSML
		// voice gender ("neutral").
		Voice: &texttospeechpb.VoiceSelectionParams{
			LanguageCode: "ja-JP",
			Name:         "ja-JP-Wavenet-B",
		},
		// Select the type of audio file you want returned.
		AudioConfig: &texttospeechpb.AudioConfig{
			AudioEncoding: texttospeechpb.AudioEncoding_MP3,
		},
	}

	resp, err := c.textToSpeechClient.SynthesizeSpeech(ctx, &req)
	if err != nil {
		log.Fatal(err)
	}

	// The resp's AudioContent is binary.
	filename := filepath.Join(outputPath, outputFileName+".mp3")
	err = os.WriteFile(filename, resp.AudioContent, 0644)
	if err != nil {
		log.Fatal(err)
	}
	fmt.Printf("Audio content written to file: %v\n", filename)
	return
}