diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2012-11-13 17:47:39 +0000 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2012-11-13 17:47:39 +0000 |
commit | c0bb288ff148274bd258562b0c718aa5e009cca0 (patch) | |
tree | bbc0c9f9c2757e73d01e5fe2e10e7812a96ebd5b /libs | |
parent | 55c7a3bf01ddbc22620eccbf682f5094e6be97e3 (diff) |
change handling of MIDI gain so that we present a linear fader spanning 0..127. this is based on the realization that we actually have no idea what the MIDI receiver will do with velocity and/or CC #7 values, and so trying to pretend that we can provide some kind of dB value in the display or the behaviour of the fader is completely wrong; ALSO: fix keyboard entry of fader levels for non EN locales (#5027)
git-svn-id: svn://localhost/ardour2/branches/3.0@13480 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'libs')
-rw-r--r-- | libs/ardour/amp.cc | 24 | ||||
-rw-r--r-- | libs/ardour/ardour/amp.h | 12 |
2 files changed, 24 insertions, 12 deletions
diff --git a/libs/ardour/amp.cc b/libs/ardour/amp.cc index d68f73ef3e..c0cd404cf6 100644 --- a/libs/ardour/amp.cc +++ b/libs/ardour/amp.cc @@ -33,6 +33,10 @@ using namespace ARDOUR; using namespace PBD; +using std::min; + +/* gain range of -inf to +6dB, default 0dB */ +const float Amp::max_gain_coefficient = 1.99526231f; Amp::Amp (Session& s) : Processor(s, "Amp") @@ -42,8 +46,7 @@ Amp::Amp (Session& s) , _gain_automation_buffer(0) { Evoral::Parameter p (GainAutomation); - /* gain range of -inf to +6dB, default 0dB */ - p.set_range (0, 1.99526231f, 1, false); + p.set_range (0, max_gain_coefficient, 1, false); boost::shared_ptr<AutomationList> gl (new AutomationList (p)); _gain_control = boost::shared_ptr<GainControl> (new GainControl (X_("gaincontrol"), s, this, p, gl)); _gain_control->set_flags (Controllable::GainLike); @@ -114,11 +117,12 @@ Amp::run (BufferSet& bufs, framepos_t /*start_frame*/, framepos_t /*end_frame*/, for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { MidiBuffer& mb (*i); - + const float midi_velocity_factor = gain_coefficient_to_midi_velocity_factor (_current_gain); + for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *m; if (ev.is_note_on()) { - ev.scale_velocity (_current_gain); + ev.scale_velocity (midi_velocity_factor); } } } @@ -172,8 +176,8 @@ Amp::apply_gain (BufferSet& bufs, framecnt_t nframes, gain_t initial, gain_t tar Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *m; if (ev.is_note_on()) { - gain_t scale = delta * (ev.time()/(double) nframes); - ev.scale_velocity (initial+scale); + const gain_t scale = delta * (ev.time()/(double) nframes); + ev.scale_velocity (gain_coefficient_to_midi_velocity_factor (initial+scale)); } } } @@ -331,11 +335,12 @@ Amp::apply_simple_gain (BufferSet& bufs, framecnt_t nframes, gain_t target) for (BufferSet::midi_iterator i = bufs.midi_begin(); i != bufs.midi_end(); ++i) { MidiBuffer& mb (*i); + const float midi_velocity_factor = gain_coefficient_to_midi_velocity_factor (target); for (MidiBuffer::iterator m = mb.begin(); m != mb.end(); ++m) { Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *m; if (ev.is_note_on()) { - ev.scale_velocity (target); + ev.scale_velocity (midi_velocity_factor); } } } @@ -371,10 +376,7 @@ Amp::inc_gain (gain_t factor, void *src) void Amp::set_gain (gain_t val, void *src) { - // max gain at about +6dB (10.0 ^ ( 6 dB * 0.05)) - if (val > 1.99526231f) { - val = 1.99526231f; - } + val = min (val, max_gain_coefficient); if (src != _gain_control.get()) { _gain_control->set_value (val); diff --git a/libs/ardour/ardour/amp.h b/libs/ardour/ardour/amp.h index 46dbdba227..dcffb1bcdb 100644 --- a/libs/ardour/ardour/amp.h +++ b/libs/ardour/ardour/amp.h @@ -102,7 +102,17 @@ public: } std::string value_as_string (boost::shared_ptr<AutomationControl>) const; - + + static const float max_gain_coefficient; + + inline static float gain_coefficient_to_midi_velocity_factor (gain_t v) { + return (v/max_gain_coefficient); + } + + inline static gain_t midi_velocity_factor_to_gain_coefficient (float v) { + return v * max_gain_coefficient; + } + private: bool _denormal_protection; bool _apply_gain; |