#include "pbd/convert.h"
#include "pbd/strsplit.h"
+#include "evoral/Curve.hpp"
+
#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"
+#include "pbd/i18n.h"
using namespace ARDOUR;
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")) {
-
- alist()->reset_default (1.0);
-
- lower_db = accurate_coefficient_to_dB (_desc.lower);
- range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db;
-}
-
-double
-GainControl::get_value () const
+ : SlavableAutomationControl (session, param, ParameterDescriptor(param),
+ al ? al : boost::shared_ptr<AutomationList> (new AutomationList (param)),
+ param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol"),
+ Controllable::GainLike)
{
- Glib::Threads::RWLock::ReaderLock lm (master_lock);
-
- if (_masters.empty()) {
- return AutomationControl::get_value();
- }
-
- gain_t g = 1.0;
-
- for (Masters::const_iterator mr = _masters.begin(); mr != _masters.end(); ++mr) {
- /* get current master value, scale by our current ratio with that master */
- g *= mr->master()->get_value () * mr->ratio();
- }
-
- return g;
-}
-
-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)
+GainControl::inc_gain (gain_t factor)
{
- /* used only automation playback */
- _set_value (val, Controllable::NoGroup);
-}
-
-void
-GainControl::_set_value (double val, Controllable::GroupControlDisposition group_override)
-{
- val = std::max (std::min (val, (double)_desc.upper), (double)_desc.lower);
-
- {
- Glib::Threads::RWLock::WriterLock lm (master_lock);
-
- if (!_masters.empty()) {
- recompute_masters_ratios (val);
- }
- }
-
- AutomationControl::set_value (val, group_override);
-
- _session.set_dirty ();
-}
+ /* To be used ONLY when doing group-relative gain adjustment, from
+ * ControlGroup::set_group_values().
+ */
-double
-GainControl::internal_to_interface (double v) const
-{
- if (_desc.type == GainAutomation) {
- return gain_to_slider_position (v);
- } else {
- return (accurate_coefficient_to_dB (v) - lower_db) / range_db;
- }
-}
+ const float desired_gain = get_value ();
-double
-GainControl::interface_to_internal (double v) const
-{
- if (_desc.type == GainAutomation) {
- return slider_position_to_gain (v);
+ if (fabsf (desired_gain) < GAIN_COEFF_SMALL) {
+ // really?! what's the idea here?
+ actually_set_value (0.000001f + (0.000001f * factor), Controllable::ForGroup);
} else {
- return dB_to_coefficient (lower_db + v * range_db);
- }
-}
-
-double
-GainControl::internal_to_user (double v) const
-{
- return accurate_coefficient_to_dB (v);
-}
-
-double
-GainControl::user_to_internal (double u) const
-{
- return dB_to_coefficient (u);
-}
-
-std::string
-GainControl::get_user_string () const
-{
- char theBuf[32]; sprintf( theBuf, _("%3.1f dB"), accurate_coefficient_to_dB (get_value()));
- return std::string(theBuf);
-}
-
-gain_t
-GainControl::get_master_gain () const
-{
- Glib::Threads::RWLock::ReaderLock 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 (read or write lock is acceptable) */
-
- gain_t g = 1.0;
-
- for (Masters::const_iterator mr = _masters.begin(); mr != _masters.end(); ++mr) {
- /* get current master value, scale by our current ratio with that master */
- g *= mr->master()->get_value () * mr->ratio();
- }
-
- return g;
-}
-
-void
-GainControl::add_master (boost::shared_ptr<VCA> vca)
-{
- gain_t old_master_val;
- std::pair<Masters::iterator,bool> res;
-
- {
- Glib::Threads::RWLock::WriterLock lm (master_lock);
- old_master_val = get_master_gain_locked ();
-
- /* ratio will be recomputed below */
-
- MasterRecord mr (vca->control(), vca->number(), 0.0);
-
- res = _masters.insert (mr);
- recompute_masters_ratios (old_master_val);
-
- /* note that we bind @param m as a weak_ptr<GainControl>, thus
- avoiding holding a reference to the control in the binding
- itself.
- */
-
- vca->DropReferences.connect_same_thread (masters_connections, boost::bind (&GainControl::master_going_away, this, vca));
- vca->control()->Changed.connect_same_thread (masters_connections, boost::bind (&PBD::Signal0<void>::operator(), &Changed));
- }
-
- if (res.second) {
- VCAStatusChange (); /* EMIT SIGNAL */
+ actually_set_value (desired_gain + (desired_gain * factor), Controllable::ForGroup);
}
}
void
-GainControl::master_going_away (boost::weak_ptr<VCA> wv)
+GainControl::post_add_master (boost::shared_ptr<AutomationControl> m)
{
- boost::shared_ptr<VCA> v = wv.lock();
- if (v) {
- remove_master (v);
+ if (m->get_value() == 0) {
+ /* master is at -inf, which forces this ctrl to -inf on assignment */
+ Changed (false, Controllable::NoGroup); /* EMIT SIGNAL */
}
}
-void
-GainControl::remove_master (boost::shared_ptr<VCA> vca)
-{
- gain_t old_master_val;
- Masters::size_type erased = 0;
-
- {
- Glib::Threads::RWLock::WriterLock lm (master_lock);
- old_master_val = get_master_gain_locked ();
- MasterRecord mr (vca->control(), vca->number(), 0.0);
- erased = _masters.erase (mr);
- if (erased) {
- recompute_masters_ratios (old_master_val);
- }
- }
-
- if (erased) {
- VCAStatusChange (); /* EMIT SIGNAL */
- }
-}
-
-void
-GainControl::clear_masters ()
-{
- bool had_masters = false;
-
- {
- Glib::Threads::RWLock::WriterLock lm (master_lock);
- if (!_masters.empty()) {
- had_masters = true;
- }
- _masters.clear ();
- }
-
- if (had_masters) {
- VCAStatusChange (); /* EMIT SIGNAL */
- }
-}
-
-void
-GainControl::recompute_masters_ratios (double val)
-{
- /* Master WRITE lock must be held */
-
- /* V' is the new gain value for this
-
- 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->master()->get_value();
- }
-
- const double new_universal_ratio = pow ((val / masters_total_gain_coefficient), (1.0/nmasters));
-
- for (Masters::iterator mr = _masters.begin(); mr != _masters.end(); ++mr) {
- const_cast<MasterRecord*>(&(*mr))->reset_ratio (new_universal_ratio);
- }
-}
-
-bool
-GainControl::slaved_to (boost::shared_ptr<VCA> vca) const
-{
- Glib::Threads::RWLock::ReaderLock lm (master_lock);
- return find (_masters.begin(), _masters.end(), MasterRecord (vca->control(), vca->number(), 0.0)) != _masters.end();
-}
-
bool
-GainControl::slaved () const
-{
- Glib::Threads::RWLock::ReaderLock lm (master_lock);
- return !_masters.empty();
-}
-
-XMLNode&
-GainControl::get_state ()
+GainControl::get_masters_curve_locked (samplepos_t start, samplepos_t end, float* vec, samplecnt_t veclen) const
{
- XMLNode& node (AutomationControl::get_state());
-
- /* 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->number(), std::dec);
- }
- }
-
- if (!str.empty()) {
- node.add_property (X_("masters"), str);
+ if (_masters.empty()) {
+ return list()->curve().rt_safe_get_vector (start, end, vec, veclen);
}
-
- return node;
-}
-
-int
-GainControl::set_state (XMLNode const& node, int version)
-{
- AutomationControl::set_state (node, version);
-
- XMLProperty const* prop = node.property (X_("masters"));
-
- /* XXX Problem here if we allow VCA's to be slaved to other VCA's .. we
- * have to load all VCAs first, then call ::set_state() so that
- * vca_by_number() will succeed.
- */
-
- if (prop) {
- vector<string> masters;
- split (prop->value(), 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);
- }
- }
+ for (samplecnt_t i = 0; i < veclen; ++i) {
+ vec[i] = 1.f;
}
-
- return 0;
+ return SlavableAutomationControl::masters_curve_multiply (start, end, vec, veclen);
}
projects / ardour.git / blobdiff