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>
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