diff --git a/examples/voice_receive/README.md b/examples/voice_receive/README.md new file mode 100644 index 000000000..8dbf55cdb --- /dev/null +++ b/examples/voice_receive/README.md @@ -0,0 +1,35 @@ + + +## DiscordGo Voice Receive Example + +This example experiments with receiving voice data from Discord. It joins +a specified voice channel, listens for 10 seconds and saves .ogg files for each +SSRC that it finds in the channel. An exercise left to the reader is to translate +these SSRCs to user IDs; see speaking update events for this information. :) + +This example makes heavy use of the [Pion](https://github.com/pion) family of libraries. +Go check them out for anything to do with voice, video or WebRTC; it's a great +group of people maintaining the project! + +Please note that voice receive is **not** officially supported, any may break +at essentially any time (and has in the past). This code works at the time of +its writing, but YMMV in the future. + +**Join [Discord Gophers](https://discord.gg/0f1SbxBZjYoCtNPP) +Discord chat channel for support.** + +### Build + +To build, make sure that modules are enabled, and run: + +```sh +go build +``` + +### Usage + +Three flags are required: the bot's token, the guild ID containing the voice channel to join, and the ID of the voice channel to join. + +```sh +./voice_receive -t MY_TOKEN -g 1234123412341234 -c 5678567856785678 +``` diff --git a/examples/voice_receive/go.mod b/examples/voice_receive/go.mod new file mode 100644 index 000000000..f6bbdeb80 --- /dev/null +++ b/examples/voice_receive/go.mod @@ -0,0 +1,7 @@ +module github.com/bwmarrin/discordgo/examples/voice_receive + +require ( + github.com/bwmarrin/discordgo v0.21.1 + github.com/pion/rtp v1.6.0 + github.com/pion/webrtc/v3 v3.0.0-20200721060053-ca3cc9d940bc +) diff --git a/examples/voice_receive/go.sum b/examples/voice_receive/go.sum new file mode 100644 index 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flag.StringVar(&Token, "t", "", "Bot Token") + flag.StringVar(&GuildID, "g", "", "Guild in which voice channel exists") + flag.StringVar(&ChannelID, "c", "", "Voice channel to connect to") + flag.Parse() +} + +func createPionRTPPacket(p *discordgo.Packet) *rtp.Packet { + return &rtp.Packet{ + Header: rtp.Header{ + Version: 2, + // Taken from Discord voice docs + PayloadType: 0x78, + SequenceNumber: p.Sequence, + Timestamp: p.Timestamp, + SSRC: p.SSRC, + }, + Payload: p.Opus, + } +} + +func handleVoice(c chan *discordgo.Packet) { + files := make(map[uint32]media.Writer) + for p := range c { + file, ok := files[p.SSRC] + if !ok { + var err error + file, err = oggwriter.New(fmt.Sprintf("%d.ogg", p.SSRC), 48000, 2) + if err != nil { + fmt.Printf("failed to create file %d.ogg, giving up on recording: %v\n", p.SSRC, err) + return + } + files[p.SSRC] = file + } + // Construct pion RTP packet from DiscordGo's type. + rtp := createPionRTPPacket(p) + err := file.WriteRTP(rtp) + if err != nil { + fmt.Printf("failed to write to file %d.ogg, giving up on recording: %v\n", p.SSRC, err) + } + } + + // Once we made it here, we're done listening for packets. Close all files + for _, f := range files { + f.Close() + } +} + +func main() { + s, err := discordgo.New("Bot " + Token) + if err != nil { + fmt.Println("error creating Discord session:", err) + return + } + defer s.Close() + + // We only really care about receiving voice state updates. + s.Identify.Intents = discordgo.MakeIntent(discordgo.IntentsGuildVoiceStates) + + err = s.Open() + if err != nil { + fmt.Println("error opening connection:", err) + return + } + + v, err := s.ChannelVoiceJoin(GuildID, ChannelID, true, false) + if err != nil { + fmt.Println("failed to join voice channel:", err) + return + } + + go func() { + time.Sleep(10 * time.Second) + close(v.OpusRecv) + v.Close() + }() + + handleVoice(v.OpusRecv) +}