Allow users to allocate multiple virtual channels independently of
browser tab count. Channels survive SDR center-frequency retuning as
long as they stay within the capture bandwidth; channels that fall
outside the SDR span are automatically destroyed.
Changes:
- trx-core: add AUDIO_MSG_VCHAN_DESTROYED (0x12) wire constant;
add default subscribe_destroyed() to VirtualChannelManager trait
- trx-backend-soapysdr: update_center_hz() detects OOB channels,
removes them, fires destroyed_tx broadcast; add destroyed_sender()
and subscribe_destroyed() override
- trx-server/audio: recv_destroyed() helper avoids select! busy-loop
for non-SDR backends; send AUDIO_MSG_VCHAN_DESTROYED to client when
a channel is evicted server-side
- trx-client/audio_client: persist active_subs across TCP reconnects,
re-subscribe on reconnect; handle AUDIO_MSG_VCHAN_DESTROYED by
pruning vchan_audio map and forwarding UUID via vchan_destroyed_tx
- trx-frontend/lib: add vchan_destroyed broadcast field to
FrontendRuntimeContext
- trx-client/main: wire vchan_destroyed_tx into audio client and
frontend runtime context
- trx-frontend-http/vchan: remove per-session one-channel limit in
allocate(); replace auto-evict in release_session_on_rig() with
subscriber-count-only update; add remove_by_uuid() for server-
triggered OOB destruction (skips redundant VChanAudioCmd::Remove)
- trx-frontend-http/server: spawn background task that forwards
vchan_destroyed broadcast to ClientChannelManager.remove_by_uuid()
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
sjg
60267d450b
