{
  "spec": "wacrg",
  "version": "0.1.0",
  "note": "Pull feed. Poll this file; the parts a flavor implements are under flavors.<id>. Diff across versions to follow updates.",
  "parts": [
    {
      "id": "call-offer",
      "category": "signalling",
      "title": "Call offer stanza",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-offer"
    },
    {
      "id": "video-call",
      "category": "signalling",
      "title": "Video call negotiation",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "partial"
        }
      ],
      "ref": "index.md#video-call"
    },
    {
      "id": "call-accept",
      "category": "signalling",
      "title": "Call accept stanza",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-accept"
    },
    {
      "id": "call-preaccept",
      "category": "signalling",
      "title": "Call pre-accept (ringing)",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-preaccept"
    },
    {
      "id": "call-transport",
      "category": "signalling",
      "title": "Transport stanza",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-transport"
    },
    {
      "id": "group-call",
      "category": "signalling",
      "title": "Group call setup",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "group",
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "unknown"
        }
      ],
      "ref": "index.md#group-call"
    },
    {
      "id": "call-ack",
      "category": "signalling",
      "title": "Call stanza acknowledgement",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-ack"
    },
    {
      "id": "call-reject",
      "category": "signalling",
      "title": "Call reject stanza",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-reject"
    },
    {
      "id": "raise-hand",
      "category": "signalling",
      "title": "Raise hand",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "group",
        "raise-hand"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "unknown"
        }
      ],
      "ref": "index.md#raise-hand"
    },
    {
      "id": "reactions",
      "category": "signalling",
      "title": "In-call emoji reactions",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "reactions",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "unknown"
        }
      ],
      "ref": "index.md#reactions"
    },
    {
      "id": "screen-share",
      "category": "signalling",
      "title": "Screen sharing",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "screen-share",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "unknown"
        }
      ],
      "ref": "index.md#screen-share"
    },
    {
      "id": "flow-call-missed",
      "category": "signalling",
      "title": "Missed / timed-out call flow",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#flow-call-missed"
    },
    {
      "id": "call-mute",
      "category": "signalling",
      "title": "Mute signalling",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "planned"
        }
      ],
      "ref": "index.md#call-mute"
    },
    {
      "id": "call-terminate",
      "category": "signalling",
      "title": "Call terminate stanza",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-terminate"
    },
    {
      "id": "call-relaylatency",
      "category": "signalling",
      "title": "Relay latency reporting",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#call-relaylatency"
    },
    {
      "id": "flow-incoming-1to1",
      "category": "signalling",
      "title": "Incoming 1:1 call flow",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#flow-incoming-1to1"
    },
    {
      "id": "flow-outgoing-1to1",
      "category": "signalling",
      "title": "Outgoing 1:1 call flow",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "partial"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#flow-outgoing-1to1"
    },
    {
      "id": "flow-call-rejected",
      "category": "signalling",
      "title": "Rejected call flow",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#flow-call-rejected"
    },
    {
      "id": "mlow",
      "category": "encodings",
      "title": "MLow audio codec",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow"
    },
    {
      "id": "mlow-red-fec",
      "category": "encodings",
      "title": "MLow RED and Reed-Solomon FEC",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-red-fec"
    },
    {
      "id": "mlow-frame",
      "category": "encodings",
      "title": "MLow frame and TOC",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-frame"
    },
    {
      "id": "mlow-rangecoder",
      "category": "encodings",
      "title": "MLow range coder",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-rangecoder"
    },
    {
      "id": "opus",
      "category": "encodings",
      "title": "Opus codec",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#opus"
    },
    {
      "id": "video",
      "category": "encodings",
      "title": "Video codec",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "video",
        "screen-share"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "unknown"
        }
      ],
      "ref": "index.md#video"
    },
    {
      "id": "video-packetization",
      "category": "encodings",
      "title": "Video packetization",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "video",
        "screen-share"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "unknown"
        },
        {
          "flavor": "meowcaller",
          "status": "planned"
        }
      ],
      "ref": "index.md#video-packetization"
    },
    {
      "id": "mlow-lsf-lpc",
      "category": "encodings",
      "title": "MLow LSF and LPC",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-lsf-lpc"
    },
    {
      "id": "mlow-encoder",
      "category": "encodings",
      "title": "MLow encode pipeline",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-encoder"
    },
    {
      "id": "mlow-excitation",
      "category": "encodings",
      "title": "MLow CELP excitation",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-excitation"
    },
    {
      "id": "mlow-decoder",
      "category": "encodings",
      "title": "MLow decode pipeline",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-decoder"
    },
    {
      "id": "mlow-noise",
      "category": "encodings",
      "title": "MLow comfort noise",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-noise"
    },
    {
      "id": "mlow-postfilter",
      "category": "encodings",
      "title": "MLow post-filters",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-postfilter"
    },
    {
      "id": "mlow-synthesis",
      "category": "encodings",
      "title": "MLow CELP synthesis",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-synthesis"
    },
    {
      "id": "mlow-vad",
      "category": "encodings",
      "title": "MLow voice activity detection",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "partial"
        }
      ],
      "ref": "index.md#mlow-vad"
    },
    {
      "id": "call-key",
      "category": "crypto",
      "title": "Call key establishment",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "planned"
        }
      ],
      "ref": "index.md#call-key"
    },
    {
      "id": "srtp-master-key",
      "category": "crypto",
      "title": "SRTP master key and salt derivation",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "planned"
        }
      ],
      "ref": "index.md#srtp-master-key"
    },
    {
      "id": "srtp-hop-by-hop",
      "category": "crypto",
      "title": "Hop-by-hop SRTP",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#srtp-hop-by-hop"
    },
    {
      "id": "sframe-media",
      "category": "crypto",
      "title": "SFrame media end-to-end encryption",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#sframe-media"
    },
    {
      "id": "srtp-e2e",
      "category": "crypto",
      "title": "End-to-end SRTP",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "planned"
        }
      ],
      "ref": "index.md#srtp-e2e"
    },
    {
      "id": "group-call-crypto",
      "category": "crypto",
      "title": "Group call crypto",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group",
        "screen-share"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "planned"
        }
      ],
      "ref": "index.md#group-call-crypto"
    },
    {
      "id": "warp-crypto",
      "category": "crypto",
      "title": "WARP key wrap",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        },
        {
          "flavor": "meowcaller",
          "status": "planned"
        }
      ],
      "ref": "index.md#warp-crypto"
    },
    {
      "id": "relay-candidates",
      "category": "relay",
      "title": "Transport candidates",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#relay-candidates"
    },
    {
      "id": "stun-relay",
      "category": "relay",
      "title": "STUN relay handshake",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#stun-relay"
    },
    {
      "id": "warp",
      "category": "relay",
      "title": "WARP relay framing",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#warp"
    },
    {
      "id": "rtcp",
      "category": "relay",
      "title": "RTCP control",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#rtcp"
    },
    {
      "id": "rtp-framing",
      "category": "relay",
      "title": "RTP framing",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#rtp-framing"
    },
    {
      "id": "ssrc",
      "category": "relay",
      "title": "SSRC allocation",
      "status": "review",
      "since": "0.1.0",
      "features": [
        "audio",
        "video",
        "group",
        "screen-share"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#ssrc"
    },
    {
      "id": "media-loop",
      "category": "relay",
      "title": "Media loop and session",
      "status": "draft",
      "since": "0.1.0",
      "features": [
        "audio",
        "video"
      ],
      "implementations": [
        {
          "flavor": "whatsapp-rust",
          "status": "working"
        },
        {
          "flavor": "zapo-caller",
          "status": "working"
        }
      ],
      "ref": "index.md#media-loop"
    }
  ],
  "flavors": {
    "cobalt": [],
    "meowcaller": [
      "mlow",
      "mlow-red-fec",
      "mlow-frame",
      "mlow-rangecoder",
      "opus",
      "video-packetization",
      "mlow-lsf-lpc",
      "mlow-encoder",
      "mlow-excitation",
      "mlow-decoder",
      "mlow-noise",
      "mlow-postfilter",
      "mlow-synthesis",
      "mlow-vad",
      "call-key",
      "srtp-master-key",
      "srtp-e2e",
      "group-call-crypto",
      "warp-crypto"
    ],
    "whatsapp-rust": [
      "call-offer",
      "video-call",
      "call-accept",
      "call-preaccept",
      "call-transport",
      "group-call",
      "call-ack",
      "call-reject",
      "raise-hand",
      "reactions",
      "screen-share",
      "flow-call-missed",
      "call-mute",
      "call-terminate",
      "call-relaylatency",
      "flow-incoming-1to1",
      "flow-outgoing-1to1",
      "flow-call-rejected",
      "mlow",
      "mlow-red-fec",
      "mlow-frame",
      "mlow-rangecoder",
      "opus",
      "video",
      "video-packetization",
      "mlow-lsf-lpc",
      "mlow-encoder",
      "mlow-excitation",
      "mlow-decoder",
      "mlow-noise",
      "mlow-postfilter",
      "mlow-synthesis",
      "mlow-vad",
      "call-key",
      "srtp-master-key",
      "srtp-hop-by-hop",
      "sframe-media",
      "srtp-e2e",
      "group-call-crypto",
      "warp-crypto",
      "relay-candidates",
      "stun-relay",
      "warp",
      "rtcp",
      "rtp-framing",
      "ssrc",
      "media-loop"
    ],
    "zapo-caller": [
      "call-offer",
      "video-call",
      "call-accept",
      "call-preaccept",
      "call-transport",
      "call-ack",
      "call-reject",
      "flow-call-missed",
      "call-mute",
      "call-terminate",
      "call-relaylatency",
      "flow-incoming-1to1",
      "flow-outgoing-1to1",
      "flow-call-rejected",
      "call-key",
      "srtp-master-key",
      "srtp-hop-by-hop",
      "sframe-media",
      "srtp-e2e",
      "group-call-crypto",
      "warp-crypto",
      "relay-candidates",
      "stun-relay",
      "warp",
      "rtcp",
      "rtp-framing",
      "ssrc",
      "media-loop"
    ]
  }
}