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Add note name parser to convert to midi note number

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Supports i18n, is case and whitespace insensitive for more resilent parsing.
This commit is contained in:
Nil Geisweiller 2017-05-12 21:27:56 +03:00 committed by Robin Gareus
parent c55c814177
commit 40f3efa3aa
2 changed files with 47 additions and 3 deletions
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8
libs/ardour/ardour/parameter_descriptor.h
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@ -43,7 +43,13 @@ struct LIBARDOUR_API ParameterDescriptor : public Evoral::ParameterDescriptor
HZ, ///< Frequency in Hertz
};
static std::string midi_note_name (uint8_t);
static std::string midi_note_name (uint8_t, bool translate=true);
/** Dual of midi_note_name, convert a note name into its midi note number. */
typedef std::map<std::string, uint8_t> NameNumMap;
static std::string normalize_note_name(const std::string& name);
static NameNumMap build_midi_name2num();
static uint8_t midi_note_num (const std::string& name);
ParameterDescriptor(const Evoral::Parameter& parameter);

42
libs/ardour/parameter_descriptor.cc
View File

@ -17,6 +17,8 @@
675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <boost/algorithm/string.hpp>
#include "ardour/amp.h"
#include "ardour/dB.h"
#include "ardour/parameter_descriptor.h"
@ -190,7 +192,7 @@ ParameterDescriptor::update_steps()
}
std::string
ParameterDescriptor::midi_note_name (const uint8_t b)
ParameterDescriptor::midi_note_name (const uint8_t b, bool translate)
{
char buf[16];
if (b > 127) {
@ -198,6 +200,10 @@ ParameterDescriptor::midi_note_name (const uint8_t b)
return buf;
}
static const char* en_notes[] = {
"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"
};
static const char* notes[] = {
S_("Note|C"),
S_("Note|C#"),
@ -215,8 +221,40 @@ ParameterDescriptor::midi_note_name (const uint8_t b)
/* MIDI note 0 is in octave -1 (in scientific pitch notation) */
const int octave = b / 12 - 1;
snprintf (buf, sizeof (buf), "%s%d", notes[b % 12], octave);
const size_t p = b % 12;
snprintf (buf, sizeof (buf), "%s%d", translate ? notes[p] : en_notes[p], octave);
return buf;
}
std::string
ParameterDescriptor::normalize_note_name(const std::string& name)
{
// Remove whitespaces and convert to lower case for a more resilient parser
return boost::to_lower_copy(boost::erase_all_copy(name, " "));
};
ParameterDescriptor::NameNumMap
ParameterDescriptor::build_midi_name2num()
{
NameNumMap name2num;
for (uint8_t num = 0; num < 128; num++) {
name2num[normalize_note_name(midi_note_name(num))] = num;
}
return name2num;
}
uint8_t
ParameterDescriptor::midi_note_num (const std::string& name)
{
static NameNumMap name2num = build_midi_name2num();
uint8_t num = -1; // -1 (or 255) is returned in case of failure
NameNumMap::const_iterator it = name2num.find(normalize_note_name(name));
if (it != name2num.end())
num = it->second;
return num;
}
} // namespace ARDOUR