675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <cmath>
+
+#include "pbd/convert.h"
+#include "pbd/strsplit.h"
+
#include "ardour/dB.h"
#include "ardour/gain_control.h"
#include "ardour/session.h"
+#include "ardour/vca.h"
+#include "ardour/vca_manager.h"
#include "i18n.h"
using namespace std;
GainControl::GainControl (Session& session, const Evoral::Parameter ¶m, boost::shared_ptr<AutomationList> al)
- : AutomationControl (session, param, ParameterDescriptor(param),
- al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
- param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol")) {
+ : SlavableAutomationControl (session, param, ParameterDescriptor(param),
+
al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
+ param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol")) {
alist()->reset_default (1.0);
range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db;
}
-double
-GainControl::get_value() const
-{
- if (!_master) {
- return AutomationControl::get_value();
- }
- return AutomationControl::get_value() * _master->get_value();
-}
-
-void
-GainControl::set_value (double val, PBD::Controllable::GroupControlDisposition group_override)
-{
- if (writable()) {
- _set_value (val, group_override);
- }
-}
-
-void
-GainControl::set_value_unchecked (double val)
-{
- /* used only automation playback */
- _set_value (val, Controllable::NoGroup);
-}
-
-void
-GainControl::_set_value (double val, Controllable::GroupControlDisposition group_override)
-{
- AutomationControl::set_value (std::max (std::min (val, (double)_desc.upper), (double)_desc.lower), group_override);
- _session.set_dirty ();
-}
-
double
GainControl::internal_to_interface (double v) const
{
}
void
-GainControl::set_master (boost::shared_ptr<GainControl> m)
+GainControl::inc_gain (gain_t factor)
{
- double old_master_val;
+ /* To be used ONLY when doing group-relative gain adjustment, from
+ * ControlGroup::set_group_values().
+ */
- if (_master) {
- old_master_val = _master->get_value();
+ const float desired_gain = user_double();
+
+ if (fabsf (desired_gain) < GAIN_COEFF_SMALL) {
+ // really?! what's the idea here?
+ actually_set_value (0.000001f + (0.000001f * factor), Controllable::ForGroup);
} else {
- old_master_val = 1.0;
+ actually_set_value (desired_gain + (desired_gain * factor), Controllable::ForGroup);
}
+}
- _master = m;
+void
+GainControl::recompute_masters_ratios (double val)
+{
+ /* Master WRITE lock must be held */
- double new_master_val;
+ /* V' is the new gain value for this
- if (_master) {
- new_master_val = _master->get_value();
- } else {
- new_master_val = 1.0;
+ Mv(n) is the return value of ::get_value() for the n-th master
+ Mr(n) is the return value of ::ratio() for the n-th master record
+
+ the slave should return V' on the next call to ::get_value().
+
+ but the value is determined by the masters, so we know:
+
+ V' = (Mv(1) * Mr(1)) * (Mv(2) * Mr(2)) * ... * (Mv(n) * Mr(n))
+
+ hence:
+
+ Mr(1) * Mr(2) * ... * (Mr(n) = V' / (Mv(1) * Mv(2) * ... * Mv(n))
+
+ if we make all ratios equal (i.e. each master contributes the same
+ fraction of its own gain level to make the final slave gain), then we
+ have:
+
+ pow (Mr(n), n) = V' / (Mv(1) * Mv(2) * ... * Mv(n))
+
+ which gives
+
+ Mr(n) = pow ((V' / (Mv(1) * Mv(2) * ... * Mv(n))), 1/n)
+
+ Mr(n) is the new ratio number for the slaves
+ */
+
+
+ const double nmasters = _masters.size();
+ double masters_total_gain_coefficient = 1.0;
+
+ for (Masters::iterator mr = _masters.begin(); mr != _masters.end(); ++mr) {
+ masters_total_gain_coefficient *= mr->second.master()->get_value();
}
- if (old_master_val != new_master_val) {
- Changed(); /* EMIT SIGNAL */
+ const double new_universal_ratio = pow ((val / masters_total_gain_coefficient), (1.0/nmasters));
+
+ for (Masters::iterator mr = _masters.begin(); mr != _masters.end(); ++mr) {
+ mr->second.reset_ratio (new_universal_ratio);
}
}
+XMLNode&
+GainControl::get_state ()
+{
+ XMLNode& node (AutomationControl::get_state());
+
+#if 0
+ /* store VCA master IDs */
+
+ string str;
+
+ {
+ Glib::Threads::RWLock::ReaderLock lm (master_lock);
+ for (Masters::const_iterator mr = _masters.begin(); mr != _masters.end(); ++mr) {
+ if (!str.empty()) {
+ str += ',';
+ }
+ str += PBD::to_string (mr->first, std::dec);
+ }
+ }
+
+ if (!str.empty()) {
+ node.add_property (X_("masters"), str);
+ }
+#endif
+
+ return node;
+}
+
+int
+GainControl::set_state (XMLNode const& node, int version)
+{
+ AutomationControl::set_state (node, version);
+
+#if 0
+ XMLProperty const* prop = node.property (X_("masters"));
+
+ /* Problem here if we allow VCA's to be slaved to other VCA's .. we
+ * have to load all VCAs first, then set up slave/master relationships
+ * once we have them all.
+ */
+
+ if (prop) {
+ masters_string = prop->value ();
+
+ if (_session.vca_manager().vcas_loaded()) {
+ vcas_loaded ();
+ } else {
+ _session.vca_manager().VCAsLoaded.connect_same_thread (vca_loaded_connection, boost::bind (&GainControl::vcas_loaded, this));
+ }
+ }
+#endif
+
+ return 0;
+}
+
+void
+GainControl::vcas_loaded ()
+{
+ if (masters_string.empty()) {
+ return;
+ }
+
+ vector<string> masters;
+ split (masters_string, masters, ',');
+
+ for (vector<string>::const_iterator m = masters.begin(); m != masters.end(); ++m) {
+ boost::shared_ptr<VCA> vca = _session.vca_manager().vca_by_number (PBD::atoi (*m));
+ if (vca) {
+ add_master (vca->gain_control());
+ }
+ }
+
+ vca_loaded_connection.disconnect ();
+ masters_string.clear ();
+}
+
projects / ardour.git / blobdiff