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Update latency-compensation when re-ordering processors

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When re-ordering processors, the route's own latency does not
change (at first).
But it might if sends or plugins with side-chains a involved.
This commit is contained in:
Robin Gareus 2019-10-30 23:51:53 +01:00
parent e2f5ce6f61
commit 27a3b93152
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
1 changed files with 38 additions and 0 deletions
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38
libs/ardour/route.cc
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@ -2119,6 +2119,44 @@ Route::apply_processor_order (const ProcessorList& new_order)
/* If the meter is in a custom position, find it and make a rough note of its position */
maybe_note_meter_position ();
/* if any latent plugins were re-ordered and sends or side-chains are present
* in the signal-flow, a full latency-recompute is needed.
*
* The Session will be informed about the new order via
* processors_changed()
* and test if a full latency-recompute is required by comparing
* _signal_latency != ::update_signal_latency();
*
* Since the route's latency itself does not initially change by
* re-ordering, we need to force this:
*/
bool need_latency_recompute = false;
for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
if (boost::shared_ptr<PortInsert> pi = boost::dynamic_pointer_cast<PortInsert> (*i)) {
need_latency_recompute = true;
break;
} else if (boost::shared_ptr<LatentSend> snd = boost::dynamic_pointer_cast<LatentSend> (*i)) {
need_latency_recompute = true;
break;
} else if (boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert> (*i)) {
if (boost::shared_ptr<IO> pio = pi->sidechain_input ()) {
need_latency_recompute = true;
break;
}
}
}
if (need_latency_recompute) {
/* force a change, the correct value will be set
* ::update_signal_latency() will be called via
*
* SIGNAL processors_changed () ->
* -> Session::route_processors_changed ()
* -> Session::update_latency_compensation ()
* -> Route::::update_signal_latency ()
*/
_signal_latency = 0;
}
}
void