X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fgain_control.cc;h=35f666bdf10c23222ed24e905b9d6e1491e8dee7;hb=567c0a8f5321f70f13e8e0c4c78725ce4521608b;hp=b9c381c406eda2acc272e350ac55e3d59e69a93f;hpb=17853bc472f3a097df53443b43cd859be356eea0;p=ardour.git diff --git a/libs/ardour/gain_control.cc b/libs/ardour/gain_control.cc index b9c381c406..35f666bdf1 100644 --- a/libs/ardour/gain_control.cc +++ b/libs/ardour/gain_control.cc @@ -21,92 +21,36 @@ #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 al) - : AutomationControl (session, param, ParameterDescriptor(param), - al ? al : boost::shared_ptr (new AutomationList (param)), - param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol")) { - + : SlavableAutomationControl (session, param, ParameterDescriptor(param), + al ? al : boost::shared_ptr (new AutomationList (param)), + param.type() == GainAutomation ? X_("gaincontrol") : X_("trimcontrol"), + Controllable::GainLike) +{ alist()->reset_default (1.0); lower_db = accurate_coefficient_to_dB (_desc.lower); range_db = accurate_coefficient_to_dB (_desc.upper) - lower_db; } -gain_t -GainControl::get_value_locked () const { - - /* read or write masters lock must be held */ - - 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->second.master()->get_value () * mr->second.ratio(); - } - - return min (Config->get_max_gain(), g); -} - -double -GainControl::get_value () const -{ - Glib::Threads::RWLock::ReaderLock lm (master_lock); - return get_value_locked (); -} - -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) -{ - 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 (); -} - double GainControl::internal_to_interface (double v) const { if (_desc.type == GainAutomation) { - return gain_to_slider_position (v); + return gain_to_slider_position_with_max (v, _desc.upper); } else { return (accurate_coefficient_to_dB (v) - lower_db) / range_db; } @@ -116,7 +60,7 @@ double GainControl::interface_to_internal (double v) const { if (_desc.type == GainAutomation) { - return slider_position_to_gain (v); + return slider_position_to_gain_with_max (v, _desc.upper); } else { return dB_to_coefficient (lower_db + v * range_db); } @@ -141,229 +85,40 @@ GainControl::get_user_string () const 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->second.master()->get_value () * mr->second.ratio(); - } - - return g; -} - void -GainControl::add_master (boost::shared_ptr vca) +GainControl::inc_gain (gain_t factor) { - gain_t current_value; - std::pair res; - - { - Glib::Threads::RWLock::WriterLock lm (master_lock); - current_value = get_value_locked (); - - /* ratio will be recomputed below */ - - res = _masters.insert (make_pair (vca->number(), MasterRecord (vca->control(), 0.0))); - - if (res.second) { - - recompute_masters_ratios (current_value); - - /* note that we bind @param m as a weak_ptr, 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)); - - /* Store the connection inside the MasterRecord, so that when we destroy it, the connection is destroyed - and we no longer hear about changes to the VCA. - */ - - vca->control()->Changed.connect_same_thread (res.first->second.connection, boost::bind (&PBD::Signal0::operator(), &Changed)); - } - } - - if (res.second) { - VCAStatusChange (); /* EMIT SIGNAL */ - } -} - -void -GainControl::master_going_away (boost::weak_ptr wv) -{ - boost::shared_ptr v = wv.lock(); - if (v) { - remove_master (v); - } -} - -void -GainControl::remove_master (boost::shared_ptr vca) -{ - gain_t current_value; - Masters::size_type erased = 0; - - { - Glib::Threads::RWLock::WriterLock lm (master_lock); - current_value = get_value_locked (); - erased = _masters.erase (vca->number()); - if (erased) { - recompute_masters_ratios (current_value); - } - } - - if (erased) { - VCAStatusChange (); /* EMIT SIGNAL */ - } -} - -void -GainControl::clear_masters () -{ - bool had_masters = false; + /* To be used ONLY when doing group-relative gain adjustment, from + * ControlGroup::set_group_values(). + */ - { - Glib::Threads::RWLock::WriterLock lm (master_lock); - if (!_masters.empty()) { - had_masters = true; - } - _masters.clear (); - } + const float desired_gain = get_value (); - if (had_masters) { - VCAStatusChange (); /* EMIT SIGNAL */ + if (fabsf (desired_gain) < GAIN_COEFF_SMALL) { + // really?! what's the idea here? + actually_set_value (0.000001f + (0.000001f * factor), Controllable::ForGroup); + } else { + actually_set_value (desired_gain + (desired_gain * factor), Controllable::ForGroup); } } void -GainControl::recompute_masters_ratios (double val) +GainControl::post_add_master (boost::shared_ptr m) { - /* 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->second.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) { - mr->second.reset_ratio (new_universal_ratio); + if (m->get_value() == 0) { + /* master is at -inf, which forces this ctrl to -inf on assignment */ + Changed (false, Controllable::NoGroup); /* EMIT SIGNAL */ } } bool -GainControl::slaved_to (boost::shared_ptr vca) const +GainControl::get_masters_curve_locked (framepos_t start, framepos_t end, float* vec, framecnt_t veclen) const { - Glib::Threads::RWLock::ReaderLock lm (master_lock); - return _masters.find (vca->number()) != _masters.end(); -} - -bool -GainControl::slaved () const -{ - Glib::Threads::RWLock::ReaderLock lm (master_lock); - return !_masters.empty(); -} - -XMLNode& -GainControl::get_state () -{ - 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->first, std::dec); - } + if (_masters.empty()) { + return list()->curve().rt_safe_get_vector (start, end, vec, veclen); } - - if (!str.empty()) { - node.add_property (X_("masters"), str); + for (framecnt_t i = 0; i < veclen; ++i) { + vec[i] = 1.f; } - - 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 masters; - split (prop->value(), masters, ','); - - for (vector::const_iterator m = masters.begin(); m != masters.end(); ++m) { - boost::shared_ptr vca = _session.vca_manager().vca_by_number (PBD::atoi (*m)); - if (vca) { - add_master (vca); - } - } - } - - return 0; + return SlavableAutomationControl::masters_curve_multiply (start, end, vec, veclen); }