vobiz_webrtc 0.1.0

Flutter SDK for making and receiving calls on the Vobiz platform using SIP-over-WebSocket and WebRTC. Includes automatic SIP registration, WebRTC audio setup, and call state management.

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

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0.1.0 - 2026-04-29

Added

• Initial release of Vobiz WebRTC SDK for Flutter

• SIP Features:

  • WebSocket-based SIP registration with digest authentication
  • Automatic SIP keep-alive (OPTIONS every 60 seconds)
  • Support for REGISTER, INVITE, ACK, BYE, CANCEL, OPTIONS methods
  • CSeq tracking and dialog state management
  • INVITE retransmit handling

• Call Features:

  • Outbound calling to PSTN numbers
  • Inbound call detection and routing
  • Call state machine (idle → calling → ringing → inCall → ended)
  • Answer/Reject call handling
  • Mute/Unmute microphone control

• WebRTC Features:

  • Automatic peer connection management
  • Audio-only media streams
  • ICE candidate collection and management
  • SDP offer/answer negotiation
  • Automatic ICE gathering

• Network Robustness:

  • Auto-reconnect on WebSocket drop
  • SIP registration refresh every 55 minutes
  • ICE gathering with 8-second timeout
  • Connection state tracking

• Platform Support:

  • Android 5.0+ (API 21+)
  • iOS 11.0+

• Documentation:

  • Quick-start guide
  • Platform setup instructions (Android & iOS)
  • API reference
  • Answer URL contract specification
  • Troubleshooting guide

Known Limitations

• Push notifications for background call wake-up not implemented yet
• No conference bridge (1:1 calls only)
• TURN server configuration optional (Google STUN only by default)

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Upcoming

0.2.0 Planned

• Push notification support (APNs & FCM)
• Conference bridge
• Call recording
• Better reconnection logic

0.3.0 Planned

• Advanced call features (blind transfer, hold/resume)
• Multiple concurrent calls
• Analytics

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Support

• GitHub Issues
• Email Support