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4.6 KiB
4.6 KiB
Voice
Terminology
- Discord Gateway - The standard Discord Gateway users connect to and receive update events from
- Discord Voice Gateway - The Discord Voice gateway that allows voice connections to be configured
- Voice Server - What the Discord Voice Gateway allows connection to for sending of Opus voice packets over UDP
- Voice Packet - Opus encoded UDP packet that contains audio
- Application - Could be a custom Discord Client or Bot (nothing that is within this package)
- Library - Code within this package
Connection Flow
- The application would get a new
*Voice
instance by callingNewVoice()
- When the application wants to connect to a voice channel they would call
JoinChannel()
on the stored*Voice
instance
- The library sends a Voice State Update to the Discord Gateway.
- The library waits until it receives a Voice Server Update from the Discord Gateway.
- Once a Voice Server Update event is received, a new connection is opened to the Discord Voice Gateway.
- The Discord Voice Gateway will first send a Hello Event
which will be used to create a new
*heart.PacemakerLoop
and start sending heartbeats to the Discord Voice Gateway. - Afterwards, an Identify Command or Resume Command is sent to the Discord Voice Gateway depending on whether the library is reconnecting.
- The Discord Voice Gateway should then respond with a Ready Event once the connection is opened, providing the required information to connect to a Voice Server.
- Using the information provided in the Ready Event, a new UDP connection is opened to the Voice Server and IP Discovery occurs.
- After IP Discovery returns the Application's external ip and port it connected to the Voice Server with, the library sends a Select Protocol Event to the Discord Voice Gateway.
- The library waits until it receives a Session Description Event from the Discord Voice Gateway.
- Once the Session Description Event is received, Speaking Events and Voice Packets can begin to be sent to the Discord Voice Gateway and Voice Server respectively.
Usage
- The application would get a new
*Voice
instance by callingNewVoice()
and keep it stored for when it needs to open voice connections. - When the application wants to connect to a voice channel they would call
JoinChannel()
on the stored*Voice
instance. JoinChannel()
will block as it follows the Connection Flow, returning anerror
if one occurs and a*voice.Session
if it was successful.- The application should now call
(*voice.Session).Speaking()
with the wanted voice flag (voicegateway.Microphone
,voicegateway.Soundshare
, orvoicegateway.Priority
). - The application can now send Voice Packets using the
(*voice.Session).Write()
method which will be sent to the Voice Server.(*voice.Session)
also implementsio.Writer
. - When the application wants to stop sending Voice Packets they should call
(*voice.Session).StopSpeaking()
, then any required voice cleanup (closing streams, etc.), then(*voice.Session).Disconnect()
Examples
Check the integration tests at voice/integration_test.go.