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/*
Copyright (C) 2007 Paul Davis
Author: Dave 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_parameter_h__
#define __ardour_parameter_h__
#include <string>
#include <pbd/compose.h>
#include <pbd/error.h>
#include <ardour/types.h>
namespace ARDOUR {
/** ID of an automatable parameter.
*
* A given automatable object has a number of automatable parameters. This is
* the unique ID for those parameters. Anything automatable (AutomationList,
* Curve) must have an ID unique with respect to it's Automatable parent.
*
* A parameter ID has two parts, a type and an int (only used by some types).
*
* This is a bit more ugly than it could be, due to using the existing/legacy
* ARDOUR::AutomationType: GainAutomation, PanAutomation, SoloAutomation,
* and MuteAutomation use only the type(), but PluginAutomation and
* MidiCCAutomation use the id() as port number and CC number, respectively.
*
* Future types may use a string or URI or whatever, as long as these are
* comparable anything may be added. ints are best as these should be fast to
* copy and compare with one another.
*/
class Parameter
{
public:
inline Parameter(AutomationType type = NullAutomation, uint32_t id=0) : _type(type), _id(id) {}
/** Construct an Parameter from a string returned from Parameter::to_string
* (AutomationList automation-id property)
*/
Parameter(const std::string& str) : _type(NullAutomation), _id(0) {
if (str == "gain") {
_type = GainAutomation;
} else if (str == "solo") {
_type = SoloAutomation;
} else if (str == "mute") {
_type = MuteAutomation;
} else if (str == "fadein") {
_type = FadeInAutomation;
} else if (str == "fadeout") {
_type = FadeOutAutomation;
} else if (str == "envelope") {
_type = EnvelopeAutomation;
} else if (str == "pan") {
_type = PanAutomation;
} else if (str.length() > 4 && str.substr(0, 4) == "pan-") {
_type = PanAutomation;
_id = atoi(str.c_str()+4);
} else if (str.length() > 10 && str.substr(0, 10) == "parameter-") {
_type = PluginAutomation;
_id = atoi(str.c_str()+10);
} else if (str.length() > 7 && str.substr(0, 7) == "midicc-") {
_type = MidiCCAutomation;
_id = atoi(str.c_str()+7);
} else {
PBD::warning << "Unknown Parameter '" << str << "'" << endmsg;
}
}
inline AutomationType type() const { return _type; }
inline uint32_t id() const { return _id; }
inline bool operator==(const Parameter& id) const
{ return (_type == id._type && _id == id._id); }
/** Arbitrary but fixed ordering, so we're comparable (usable in std::map) */
inline bool operator<(const Parameter& id) const {
#ifndef NDEBUG
if (_type == NullAutomation)
PBD::warning << "Uninitialized Parameter compared." << endmsg;
#endif
return (_type < id._type || _id < id._id);
}
inline operator bool() const { return (_type != 0); }
/** Unique string representation, suitable as an XML property value.
* e.g. <AutomationList automation-id="whatthisreturns">
*/
inline std::string to_string() const {
if (_type == GainAutomation) {
return "gain";
} else if (_type == PanAutomation) {
return string_compose("pan-%1", _id);
} else if (_type == SoloAutomation) {
return "solo";
} else if (_type == MuteAutomation) {
return "mute";
} else if (_type == FadeInAutomation) {
return "fadein";
} else if (_type == FadeOutAutomation) {
return "fadeout";
} else if (_type == EnvelopeAutomation) {
return "envelope";
} else if (_type == PluginAutomation) {
return string_compose("parameter-%1", _id);
} else if (_type == MidiCCAutomation) {
return string_compose("midicc-%1", _id);
} else {
assert(false);
PBD::warning << "Uninitialized Parameter to_string() called." << endmsg;
return "";
}
}
/* The below properties are only used for CC right now, but unchanging properties
* of parameters (rather than changing parameters of automation lists themselves)
* should be moved here */
inline double min() const {
if (_type == MidiCCAutomation)
return 0.0;
else
return DBL_MIN;
}
inline double max() const {
if (_type == MidiCCAutomation)
return 127.0;
else
return DBL_MAX;
}
inline bool is_integer() const {
return (_type == MidiCCAutomation);
}
private:
// default copy constructor is ok
AutomationType _type;
uint32_t _id;
};
} // namespace ARDOUR
#endif // __ardour_parameter_h__
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