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vca design: gain controls cannot silently "merge" the master(s) value into their own

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This commit is contained in:
Paul Davis 2016-02-29 09:09:53 -05:00
parent 405f9fc712
commit 8eafe8b804
3 changed files with 22 additions and 25 deletions
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2
libs/ardour/amp.cc
View file

@ -118,7 +118,7 @@ Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/,
} else { /* manual (scalar) gain */
gain_t const dg = _gain_control->user_double();
gain_t const dg = _gain_control->user_double() * _gain_control->get_master_gain ();
if (_current_gain != dg) {

5
libs/ardour/ardour/gain_control.h
View file

@ -43,7 +43,6 @@ class LIBARDOUR_API GainControl : public AutomationControl {
void set_value (double val, PBD::Controllable::GroupControlDisposition group_override);
void set_value_unchecked (double);
double get_value () const;
double internal_to_interface (double) const;
double interface_to_internal (double) const;
@ -54,18 +53,20 @@ class LIBARDOUR_API GainControl : public AutomationControl {
double lower_db;
double range_db;
gain_t get_master_gain () const;
void add_master (boost::shared_ptr<GainControl>);
void remove_master (boost::shared_ptr<GainControl>);
void clear_masters ();
private:
void _set_value (double val, PBD::Controllable::GroupControlDisposition group_override);
gain_t get_master_gain () const;
mutable Glib::Threads::Mutex master_lock;
typedef std::list<boost::shared_ptr<GainControl> > Masters;
Masters _masters;
gain_t get_master_gain_locked () const;
};
} /* namespace */

40
libs/ardour/gain_control.cc
View file

@ -36,22 +36,6 @@ GainControl::GainControl (Session& session, const Evoral::Parameter &param, boos
range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db;
}
double
GainControl::get_value() const
{
Glib::Threads::Mutex::Lock sm (master_lock, Glib::Threads::TRY_LOCK);
if (sm.locked()) {
if (_masters.empty()) {
return AutomationControl::get_value();
}
return AutomationControl::get_value() * get_master_gain ();
} else {
/* could not take lock */
return AutomationControl::get_value ();
}
}
void
GainControl::set_value (double val, PBD::Controllable::GroupControlDisposition group_override)
{
@ -115,6 +99,18 @@ GainControl::get_user_string () const
gain_t
GainControl::get_master_gain () const
{
Glib::Threads::Mutex::Lock sm (master_lock, Glib::Threads::TRY_LOCK);
if (sm.locked()) {
return get_master_gain_locked ();
}
return 1.0;
}
gain_t
GainControl::get_master_gain_locked () const
{
/* Master lock MUST be held */
@ -135,9 +131,9 @@ GainControl::add_master (boost::shared_ptr<GainControl> m)
{
Glib::Threads::Mutex::Lock lm (master_lock);
old_master_val = get_master_gain ();
old_master_val = get_master_gain_locked ();
_masters.push_back (m);
new_master_val = get_master_gain ();
new_master_val = get_master_gain_locked ();
}
if (old_master_val != new_master_val) {
@ -153,9 +149,9 @@ GainControl::remove_master (boost::shared_ptr<GainControl> m)
{
Glib::Threads::Mutex::Lock lm (master_lock);
old_master_val = get_master_gain ();
old_master_val = get_master_gain_locked ();
_masters.remove (m);
new_master_val = get_master_gain ();
new_master_val = get_master_gain_locked ();
}
if (old_master_val != new_master_val) {
@ -171,9 +167,9 @@ GainControl::clear_masters ()
{
Glib::Threads::Mutex::Lock lm (master_lock);
old_master_val = get_master_gain ();
old_master_val = get_master_gain_locked ();
_masters.clear ();
new_master_val = get_master_gain ();
new_master_val = get_master_gain_locked ();
}
if (old_master_val != new_master_val) {