diff options
Diffstat (limited to 'libs/ardour/ardour')
| -rw-r--r-- | libs/ardour/ardour/parameter_descriptor.h | 45 | ||||
| -rw-r--r-- | libs/ardour/ardour/value_as_string.h | 81 |
2 files changed, 118 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 diff --git a/libs/ardour/ardour/value_as_string.h b/libs/ardour/ardour/value_as_string.h new file mode 100644 index 0000000000..6c17ace5d3 --- /dev/null +++ b/libs/ardour/ardour/value_as_string.h @@ -0,0 +1,81 @@ +/* + Copyright (C) 2014 Paul Davis + Author: David Robillard + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#ifndef __ardour_value_as_string_h__ +#define __ardour_value_as_string_h__ + +#include <stddef.h> + +#include "ardour/parameter_descriptor.h" + +namespace ARDOUR { + +inline std::string +value_as_string(const ARDOUR::ParameterDescriptor& desc, + double v) +{ + char buf[32]; + + if (desc.scale_points) { + // Check if value is on a scale point + for (ARDOUR::ScalePoints::const_iterator i = desc.scale_points->begin(); + i != desc.scale_points->end(); + ++i) { + if (i->second == v) { + return i->first; // Found it, return scale point label + } + } + } + + // Value is not a scale point, print it normally + if (desc.unit == ARDOUR::ParameterDescriptor::MIDI_NOTE) { + if (v >= 0 && v <= 127) { + const int num = rint(v); + static const char names[12][3] = { + "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B" + }; + snprintf(buf, sizeof(buf), "%s %d", names[num % 12], (num / 12) - 2); + } else { + // Odd, invalid range, just print the number + snprintf(buf, sizeof(buf), "%.0f", v); + } + } else if (desc.integer_step) { + snprintf(buf, sizeof(buf), "%d", (int)v); + } else { + snprintf(buf, sizeof(buf), "%.2f", v); + } + if (desc.unit == ARDOUR::ParameterDescriptor::DB) { + // TODO: Move proper dB printing from AutomationLine here + return std::string(buf) + " dB"; + } + return buf; +} + +inline std::string +value_as_string(const ARDOUR::ParameterDescriptor& desc, + const ARDOUR::Variant& val) +{ + // Only numeric support, for now + return value_as_string(desc, val.to_double()); +} + +} // namespace ARDOUR + +#endif /* __ardour_value_as_string_h__ */ |