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Add API to query IO latencies

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IO::connected_latency() is relevant once Ardour publishes individual
per Port latency.

IO::public_latency() is only for debug purposes.
This commit is contained in:
Robin Gareus 2017-09-28 06:08:30 +02:00
parent 491523d6b7
commit 8ff3b5ecf6
2 changed files with 60 additions and 4 deletions
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3
libs/ardour/ardour/io.h
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@ -116,7 +116,10 @@ class LIBARDOUR_API IO : public SessionObject, public Latent
bool physically_connected () const; bool physically_connected () const;
samplecnt_t signal_latency () const { return 0; } samplecnt_t signal_latency () const { return 0; }
samplecnt_t latency () const; samplecnt_t latency () const;
samplecnt_t public_latency () const;
samplecnt_t connected_latency (bool for_playback) const;
PortSet& ports() { return _ports; } PortSet& ports() { return _ports; }
const PortSet& ports() const { return _ports; } const PortSet& ports() const { return _ports; }

61
libs/ardour/io.cc
View file

@ -1219,14 +1219,12 @@ IO::apply_pretty_name ()
samplecnt_t samplecnt_t
IO::latency () const IO::latency () const
{ {
samplecnt_t max_latency; samplecnt_t max_latency = 0;
samplecnt_t latency;
max_latency = 0;
/* io lock not taken - must be protected by other means */ /* io lock not taken - must be protected by other means */
for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) { for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
samplecnt_t latency;
if ((latency = i->private_latency_range (_direction == Output).max) > max_latency) { if ((latency = i->private_latency_range (_direction == Output).max) > max_latency) {
DEBUG_TRACE (DEBUG::Latency, string_compose ("port %1 has %2 latency of %3 - use\n", DEBUG_TRACE (DEBUG::Latency, string_compose ("port %1 has %2 latency of %3 - use\n",
name(), name(),
@ -1242,6 +1240,61 @@ IO::latency () const
return max_latency; return max_latency;
} }
samplecnt_t
IO::public_latency () const
{
samplecnt_t max_latency = 0;
/* io lock not taken - must be protected by other means */
for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
samplecnt_t latency;
if ((latency = i->public_latency_range (_direction == Output).max) > max_latency) {
DEBUG_TRACE (DEBUG::Latency, string_compose ("port %1 has %2 latency of %3 - use\n",
name(),
((_direction == Output) ? "PLAYBACK" : "CAPTURE"),
latency));
max_latency = latency;
}
}
DEBUG_TRACE (DEBUG::Latency, string_compose ("%1: max %4 public latency from %2 ports = %3\n",
name(), _ports.num_ports(), max_latency,
((_direction == Output) ? "PLAYBACK" : "CAPTURE")));
return max_latency;
}
samplecnt_t
IO::connected_latency (bool for_playback) const
{
/* io lock not taken - must be protected by other means */
samplecnt_t max_latency = 0;
bool connected = false;
/* if output is not connected to anything, use private latency */
for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
if (i->connected()) {
connected = true;
max_latency = 0;
break;
}
samplecnt_t latency;
if ((latency = i->private_latency_range (for_playback).max) > max_latency) {
max_latency = latency;
}
}
if (connected) {
for (PortSet::const_iterator i = _ports.begin(); i != _ports.end(); ++i) {
LatencyRange lr;
i->get_connected_latency_range (lr, for_playback);
if (lr.max > max_latency) {
max_latency = lr.max;
}
}
}
return max_latency;
}
int int
IO::connect_ports_to_bundle (boost::shared_ptr<Bundle> c, bool exclusive, void* src) { IO::connect_ports_to_bundle (boost::shared_ptr<Bundle> c, bool exclusive, void* src) {
return connect_ports_to_bundle(c, exclusive, false, src); return connect_ports_to_bundle(c, exclusive, false, src);