Issue 1 - Volume/mute changes from external apps (browser YT player, pulsemixer)
not reflected in the frontend:
- on_node_param and on_node_info updated node state but never called notifyChanged(),
so the SSE broadcast was never triggered for external changes.
- Add engine_ref back-pointer to Object (set in create_proxy_for_object).
- Call notifyChanged() at the end of on_node_info and after updating Props
in on_node_param, so any external volume/mute change immediately broadcasts.
Issue 2 - Volume slider has no audible effect on browser/app streams:
- setNodeVolume only set SPA_PROP_volume (single float). Browser streams
(Chromium, Firefox) use SPA_PROP_channelVolumes (per-channel float array)
and ignore the single-float property.
- Now set both SPA_PROP_volume AND SPA_PROP_channelVolumes (using the node's
known channel count, defaulting to stereo if unknown). ALSA hardware nodes
respond to SPA_PROP_volume; app streams respond to SPA_PROP_channelVolumes.
Note: wires auto-reconnecting is WirePlumber session policy (by design) —
WirePlumber re-links any stream that loses its connection to the default sink.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Backend:
- POST /api/create-null-sink {name} - loads null-sink module
- POST /api/create-loopback {name} - loads loopback module
- POST /api/unload-module {module_id} - unloads a module
- Fixed double-proxy-destroy crash in GraphEngine
- Graceful failure when module not available (no crash)
Frontend:
- + Add Device button in toolbar with dropdown menu
- Null Sink option (creates virtual audio output)
- Loopback Device option (creates paired input+output)
- Dropdown closes on outside click
Note: null-sink requires libpipewire-module-null-sink to be installed.
Loopback works on all PipeWire installations.
- Volume slider on every node (green bar, draggable)
- Mute toggle button (M/m) on every node
- Backend: read volume/mute from PipeWire node props
- Backend: POST /api/volume {node_id, volume} to set volume
- Backend: POST /api/mute {node_id, mute} to toggle mute
- Graph JSON includes volume and mute fields per node
- Slider supports drag-to-adjust with mouse
C++ backend with SSE streaming (reuses qpwgraph PipeWire callbacks).
Svelte frontend with custom SVG canvas for port-level connections.
Features:
- Live PipeWire graph via SSE
- Drag output->input port to connect
- Double-click or select+Delete to disconnect
- Node positions saved to localStorage
- Pan (drag bg) and zoom (scroll)
- Port type coloring (audio=green, midi=red, video=blue)
