ardour/livetrax
13
0
Fork 0
Code

improve AU Latency PropertyChange Events

Browse Source
This commit is contained in:
Robin Gareus 2016-07-16 18:43:10 +02:00
parent b7d730433b
commit faefc3ba9a
2 changed files with 11 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libs/ardour/ardour/audio_unit.h
View File

@ -171,7 +171,7 @@ class LIBARDOUR_API AUPlugin : public ARDOUR::Plugin
int32_t output_channels;
std::vector<std::pair<int,int> > io_configs;
framecnt_t _last_nframes;
mutable framecnt_t _current_latency;
mutable volatile guint _current_latency;
bool _requires_fixed_size_buffers;
AudioBufferList* buffers;
bool _has_midi_input;

18
libs/ardour/audio_unit.cc
View File

@ -431,7 +431,7 @@ AUPlugin::AUPlugin (AudioEngine& engine, Session& session, boost::shared_ptr<CAC
, unit (new CAAudioUnit)
, initialized (false)
, _last_nframes (0)
, _current_latency (-1)
, _current_latency (UINT_MAX)
, _requires_fixed_size_buffers (false)
, buffers (0)
, variable_inputs (false)
@ -472,7 +472,7 @@ AUPlugin::AUPlugin (const AUPlugin& other)
, unit (new CAAudioUnit)
, initialized (false)
, _last_nframes (0)
, _current_latency (-1)
, _current_latency (UINT_MAX)
, _requires_fixed_size_buffers (false)
, buffers (0)
, variable_inputs (false)
@ -955,10 +955,12 @@ AUPlugin::default_value (uint32_t port)
framecnt_t
AUPlugin::signal_latency () const
{
if (_current_latency < 0) {
_current_latency = unit->Latency() * _session.frame_rate();
guint lat = g_atomic_int_get (&_current_latency);;
if (lat == UINT_MAX) {
lat = unit->Latency() * _session.frame_rate();
g_atomic_int_set (&_current_latency, lat);
}
return _current_latency;
return lat;
}
void
@ -3474,9 +3476,9 @@ AUPlugin::parameter_change_listener (void* /*arg*/, void* src, const AudioUnitEv
{
if (event->mEventType == kAudioUnitEvent_PropertyChange) {
if (event->mArgument.mProperty.mPropertyID == kAudioUnitProperty_Latency) {
DEBUG_TRACE (DEBUG::AudioUnits, string_compose("AU Latency Change Event %1 <> %1\n", new_value, unit->Latency()));
// TODO atomically set //_current_latency = -1;
_current_latency = unit->Latency() * _session.frame_rate(); // TODO: check: new_value
DEBUG_TRACE (DEBUG::AudioUnits, string_compose("AU Latency Change Event %1 <> %2\n", new_value, unit->Latency()));
guint lat = unit->Latency() * _session.frame_rate();
g_atomic_int_set (&_current_latency, lat);
}
return;
}