diff options
Diffstat (limited to 'libs/ardour/ardour/parameter_descriptor.h')
| -rw-r--r-- | libs/ardour/ardour/parameter_descriptor.h | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/libs/ardour/ardour/parameter_descriptor.h b/libs/ardour/ardour/parameter_descriptor.h index 8916f081a3..1576230b8f 100644 --- a/libs/ardour/ardour/parameter_descriptor.h +++ b/libs/ardour/ardour/parameter_descriptor.h @@ -33,24 +33,34 @@ typedef std::map<const std::string, const float> ScalePoints; */ struct ParameterDescriptor { + enum Unit { + NONE, ///< No unit + DB, ///< Decibels + MIDI_NOTE, ///< MIDI note number + }; + ParameterDescriptor(const Evoral::Parameter& parameter) : key((uint32_t)-1) , datatype(Variant::VOID) , normal(parameter.normal()) , lower(parameter.min()) , upper(parameter.max()) - , step(0) - , smallstep((upper - lower) / 100.0) - , largestep((upper - lower) / 10.0) - , integer_step(false) + , step((upper - lower) / 100.0f) + , smallstep((upper - lower) / 1000.0f) + , largestep((upper - lower) / 10.0f) + , integer_step(parameter.type() >= MidiCCAutomation && + parameter.type() <= MidiChannelPressureAutomation) , toggled(parameter.toggled()) , logarithmic(false) , sr_dependent(false) , min_unbound(0) , max_unbound(0) , enumeration(false) - , midinote(false) - {} + { + if (parameter.type() == GainAutomation) { + unit = DB; + } + } ParameterDescriptor() : key((uint32_t)-1) @@ -68,13 +78,33 @@ struct ParameterDescriptor , min_unbound(0) , max_unbound(0) , enumeration(false) - , midinote(false) {} + /// Set step, smallstep, and largestep, based on current description + void update_steps() { + if (unit == ParameterDescriptor::MIDI_NOTE) { + step = smallstep = 1; // semitone + largestep = 12; // octave + } else { + const float delta = upper - lower; + + step = delta / 1000.0f; + smallstep = delta / 10000.0f; + largestep = delta / 10.0f; + + if (integer_step) { + step = rint(step); + largestep = rint(largestep); + // leave smallstep alone for fine tuning + } + } + } + std::string label; boost::shared_ptr<ScalePoints> scale_points; uint32_t key; ///< for properties Variant::Type datatype; ///< for properties + Unit unit; float normal; float lower; ///< for frequencies, this is in Hz (not a fraction of the sample rate) float upper; ///< for frequencies, this is in Hz (not a fraction of the sample rate) @@ -88,7 +118,6 @@ struct ParameterDescriptor bool min_unbound; bool max_unbound; bool enumeration; - bool midinote; ///< only used if integer_step is also true }; } // namespace ARDOUR |