talk in audio channel (not working yet)

core/audio.go

@@ -0,0 +1,53 @@
+package core
+
+import (
+	"fmt"
+	"log"
+	"os/exec"
+	"time"
+
+	"github.com/bwmarrin/discordgo"
+)
+
+// playSound plays the current buffer to the provided channel.
+func playSound(s *discordgo.Session, guildID, channelID string, buffer []byte) (err error) {
+
+	// Join the provided voice channel.
+	vc, err := s.ChannelVoiceJoin(guildID, channelID, false, true)
+	if err != nil {
+		log.Println("Could not find channel.")
+		return err
+	}
+
+	// Sleep for a specified amount of time before playing the sound
+	time.Sleep(250 * time.Millisecond)
+
+	// Start speaking.
+	vc.Speaking(true)
+
+	vc.OpusSend <- buffer
+
+	// Stop speaking
+	vc.Speaking(false)
+
+	// Sleep for a specificed amount of time before ending.
+	time.Sleep(250 * time.Millisecond)
+
+	// Disconnect from the provided voice channel.
+	vc.Disconnect()
+	
+	return nil
+}
+
+func getAudioMessage(msg string) (filename string, out []byte) {
+	curr_time := time.Now().Unix()
+	filename = fmt.Sprintf("%d.ogg", curr_time)
+	var cmd_args string = fmt.Sprintf("espeak-ng -s 120 -v mb-fr2 -p 30 '%s' --stdout | ffmpeg -i - -c:a libopus -f ogg pipe:1 2>/dev/null",
+		maxString(msg, 300))
+	cmd := exec.Command("sh", "-c", cmd_args)
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		fmt.Println(fmt.Sprint(err))
+	}
+	return
+}