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VocalEasel/Sources/VLModel.cpp
Matthias Neeracher f4c1d7b591 Implement MMA/MIDI output
2006-11-12 11:37:36 +00:00

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/*
* VLModel.cpp
* Vocalese
*
* Created by Matthias Neeracher on 12/18/05.
* Copyright 2005 __MyCompanyName__. All rights reserved.
*
*/
#include "VLModel.h"
#include <ctype.h>
VLFraction & VLFraction::Normalize()
{
//
// Divide GCD
//
if (fNum) {
unsigned a = fNum;
unsigned b = fDenom;
while (b) {
unsigned c = a % b;
a = b;
b = c;
}
fNum /= a;
fDenom /= a;
} else
fDenom = 1;
return *this;
}
VLFraction & VLFraction::operator+=(VLFraction other)
{
fNum = fNum*other.fDenom + other.fNum*fDenom;
fDenom *= other.fDenom;
return Normalize();
}
VLFraction & VLFraction::operator-=(VLFraction other)
{
fNum = fNum*other.fDenom - other.fNum*fDenom;
fDenom *= other.fDenom;
return Normalize();
}
VLFraction & VLFraction::operator*=(VLFraction other)
{
fNum *= other.fNum;
fDenom *= other.fDenom;
return Normalize();
}
VLFraction & VLFraction::operator/=(VLFraction other)
{
fNum *= other.fDenom;
fDenom *= other.fNum;
return Normalize();
}
VLFraction & VLFraction::operator%=(VLFraction other)
{
fNum *= other.fDenom;
fDenom *= other.fNum;
fNum %= fDenom;
return *this *= other;
}
static const char kScale[] = "c d ef g a b";
static std::string PitchName(int8_t pitch, bool useSharps)
{
if (pitch == VLNote::kNoPitch)
return "r";
pitch %= 12;
if (kScale[pitch] != ' ')
return static_cast<char>(std::toupper(kScale[pitch])) + std::string();
else if (useSharps)
return static_cast<char>(std::toupper(kScale[pitch-1]))
+ std::string(kVLSharpStr);
else
return static_cast<char>(std::toupper(kScale[pitch+1]))
+ std::string(kVLFlatStr);
}
static std::string LilypondPitchName(int8_t pitch, bool useSharps)
{
if (pitch == VLNote::kNoPitch)
return "r";
pitch %= 12;
if (kScale[pitch] != ' ')
return kScale[pitch] + std::string();
else if (useSharps)
return kScale[pitch-1] + std::string("is");
else
return kScale[pitch+1] + std::string("es");
}
static std::string MMAPitchName(int8_t pitch, bool useSharps)
{
if (pitch == VLNote::kNoPitch)
return "r";
char name[3];
name[2] = 0;
name[1] = 'n';
pitch %= 12;
if (kScale[pitch] != ' ') {
name[0] = kScale[pitch];
} else if (useSharps) {
name[0] = kScale[pitch-1];
name[1] = '#';
} else {
name[0] = kScale[pitch+1];
name[1] = '&';
}
return name;
}
VLNote::VLNote(std::string name)
{
//
// Determine key
//
if (const char * key = strchr(kScale, name[0]))
fPitch = key-kScale+kMiddleC;
else
goto failed;
name.erase(0, 1);
//
// Look for sharp / flat
//
if (name.size())
if (name[0] == '#') {
++fPitch;
name.erase(0);
} else if (name[0] == 'b') {
--fPitch;
name.erase(0, 1);
}
if (name == "")
return;
failed:
fPitch = kNoPitch; // Failed to parse completely
}
void VLNote::Name(std::string & name, bool useSharps) const
{
name = PitchName(fPitch, useSharps);
}
void VLNote::LilypondName(std::string & name, VLFraction at, const VLProperties & prop) const
{
std::string n = LilypondPitchName(fPitch, prop.fKey >= 0);
if (fPitch != kNoPitch) {
for (int ticks = (fPitch-kMiddleC+kOctave)/kOctave; ticks>0; --ticks)
n += '\'';
for (int commas = (kMiddleC-kOctave-fPitch)/kOctave; commas>0; --commas)
n += ',';
}
std::vector<std::string> durations;
VLFraction prevPart(0);
for (VLFraction dur = fDuration; dur.fNum; ) {
char duration[32];
VLFraction part, visual;
bool triplet;
prop.PartialNote(at, dur, &part);
prop.VisualNote(at, part, &visual, &triplet);
if (!triplet && fPitch != kNoPitch && part == dur && 2*visual == prevPart) {
durations.pop_back();
sprintf(duration, "%s%d.", n.c_str(), visual.fDenom/2);
} else if (triplet) {
sprintf(duration, "\\times 2/3 { %s%d }", n.c_str(), visual.fDenom);
} else {
sprintf(duration, "%s%d", n.c_str(), visual.fDenom);
}
durations.push_back(duration);
prevPart = part;
at += part;
dur -= part;
}
for (size_t i=0; i<durations.size(); ++i) {
if (i)
name += " ~ ";
name += durations[i];
}
}
static struct {
VLFract fVal;
const char * fName;
} sMMADur [] = {
{{1,1}, "1"},
{{1,2}, "2"},
{{1,3}, "23"},
{{1,4}, "4"},
{{1,6}, "81"},
{{1,8}, "8"},
{{1,12}, "82"},
{{1,16}, "16"},
{{1,24}, "6"},
{{1,32}, "32"},
{{1,64}, "64"},
{{0,0}, 0}
};
void VLNote::MMAName(std::string & name, VLFraction at, const VLProperties & prop) const
{
bool useSharps = prop.fKey >= 0;
name.clear();
for (VLFraction dur = fDuration; dur.fNum; ) {
VLFraction part;
prop.PartialNote(at, dur, &part);
for (int d=0; sMMADur[d].fName; ++d)
if (part == sMMADur[d].fVal) {
if (name.size())
name += '+';
name += sMMADur[d].fName;
}
dur -= part;
at += part;
}
name += MMAPitchName(fPitch, useSharps);
if (fPitch != kNoPitch) {
for (int raise = (fPitch-kMiddleC)/kOctave; raise>0; --raise)
name += '+';
for (int lower = (kMiddleC-fPitch)/kOctave; lower>0; --lower)
name += '-';
}
}
struct VLChordModifier {
const char * fName;
uint32_t fAddSteps;
uint32_t fDelSteps;
};
#define _ VLChord::
static const VLChordModifier kModifiers[] = {
{"b13", _ kmMin13th, 0},
{"add13", _ kmMaj13th, 0},
{"13", _ kmMin7th | _ kmMaj9th | _ km11th | _ kmMaj13th, 0},
{"#11", _ kmAug11th, 0},
{"add11", _ km11th, 0},
{"11", _ kmMin7th | _ kmMaj9th | _ km11th, 0},
{"#9", _ kmAug9th, _ kmMaj9th},
{"+9", _ kmAug9th, _ kmMaj9th},
{"b9", _ kmMin9th, _ kmMaj9th},
{"-9", _ kmMin9th, _ kmMaj9th},
{"69", _ kmDim7th | _ kmMaj9th, 0},
{"add9", _ kmMaj9th, 0},
{"9", _ kmMin7th | _ kmMaj9th, 0},
{"7", _ kmMin7th, 0},
{"maj", _ kmMaj7th, _ kmMin7th},
{"6", _ kmDim7th, 0},
{"#5", _ kmAug5th, _ km5th},
{"+5", _ kmAug5th, _ km5th},
{"aug", _ kmAug5th, _ km5th},
{"+", _ kmAug5th, _ km5th},
{"b5", _ kmDim5th, _ km5th},
{"-5", _ kmDim5th, _ km5th},
{"sus4", _ km4th, _ kmMaj3rd},
{"sus2", _ kmMaj2nd, _ kmMaj3rd},
{"sus", _ km4th, _ kmMaj3rd},
{"4", _ km4th, _ kmMaj3rd},
{"2", _ kmMaj2nd, _ kmMaj3rd},
{NULL, 0, 0}
};
VLChord::VLChord(std::string name)
{
size_t root;
//
// Determine key
//
if (const char * key = strchr(kScale, name[0]))
fPitch = key-kScale+kMiddleC;
else
goto failed;
name.erase(0, 1);
//
// Look for sharp / flat
//
if (name.size())
if (name[0] == '#') {
++fPitch;
name.erase(0, 1);
} else if (name[0] == 'b') {
--fPitch;
name.erase(0, 1);
}
//
// Root
//
fRootPitch = kNoPitch;
if ((root = name.find('/')) != std::string::npos) {
if (root+1 >= name.size())
goto failed;
if (const char * key = strchr(kScale, name[root+1]))
fRootPitch = key-kScale+kMiddleC-12;
else
goto failed;
if (root+2 < name.size()) {
switch (name[root+2]) {
case 'b':
--fRootPitch;
break;
case '#':
++fRootPitch;
break;
default:
goto failed;
}
name.erase(root, 3);
} else
name.erase(root, 2);
}
//
// Apply modifiers
//
fSteps = kmUnison | kmMaj3rd | km5th;
for (const VLChordModifier * mod = kModifiers; mod->fName && name.size() && name != "dim" && name != "m" && name != "-"; ++mod) {
size_t pos = name.find(mod->fName);
if (pos != std::string::npos) {
name.erase(pos, strlen(mod->fName));
fSteps &= ~mod->fDelSteps;
fSteps |= mod->fAddSteps;
}
}
if (name == "m" || name == "-") {
fSteps = (fSteps & ~kmMaj3rd) | kmMin3rd;
name.erase(0, 1);
} else if (name == "dim") {
uint32_t steps = fSteps & (kmMaj3rd | km5th | kmMin7th);
fSteps ^= steps;
fSteps |= steps >> 1; // Diminish 3rd, 5th, and 7th, if present
name.erase(0, 3);
}
if (name == "")
return; // Success
failed:
fPitch = kNoPitch;
}
static const char * kStepNames[] = {
"", "", "sus2", "", "", "sus", kVLFlatStr "5", "", kVLSharpStr "5", "6",
"7", kVLSharpStr "7", "", kVLFlatStr "9", "9", kVLSharpStr "9", "",
"11", kVLSharpStr "11", "", kVLFlatStr "13", "13"
};
void VLChord::Name(std::string & base, std::string & ext, std::string & root, bool useSharps) const
{
base = PitchName(fPitch, useSharps);
ext = "";
root = "";
uint32_t steps = fSteps;
//
// m / dim
//
if (steps & kmMin3rd)
if (steps & (kmDim5th|kmDim7th)
&& !(steps & (km5th|kmMin7th|kmMaj7th|kmMin9th|kmMaj9th|km11th|kmAug11th|kmMin13th|kmMaj13th))
) {
ext += "dim";
steps|= (steps & kmDim7th) << 1;
steps&= ~(kmMin3rd|kmDim5th|kmDim7th);
} else {
base += "m";
steps&= ~kmMin3rd;
}
//
// +
//
steps &= ~(kmUnison | kmMaj3rd | km5th);
if (steps == kmAug5th) {
ext += "+";
steps= 0;
}
//
// Maj
//
if (steps & kmMaj7th) {
ext += "Maj";
steps&= ~kmMaj7th;
steps|= kmMin7th; // Write out the 7 for clarification
}
//
// 6/9
//
if ((steps & (kmDim7th|kmMaj9th)) == (kmDim7th|kmMaj9th)) {
ext += "69";
steps&= ~(kmDim7th|kmMaj9th);
}
//
// Other extensions. Only the highest unaltered extension is listed.
//
bool has7th = steps & (kmMin7th|kmMaj7th);
bool has9th = steps & (kmMin9th|kmMaj9th|kmAug9th);
if ((steps & kmMaj13th) && has7th && has9th ) {
ext += kStepNames[kMaj13th];
steps &= ~(kmMin7th | kmMaj9th | km11th | kmMaj13th);
} else if ((steps & km11th) && has7th && has9th) {
ext += kStepNames[k11th];
steps &= ~(kmMin7th | kmMaj9th | km11th);
} else if ((steps & kmMaj9th) && has7th) {
ext += kStepNames[kMaj9th];
steps &= ~(kmMin7th | kmMaj9th);
} else if (steps & kmMin7th) {
ext += kStepNames[kMin7th];
steps &= ~(kmMin7th);
}
for (int step = kMin2nd; steps; ++step)
if (steps & (1 << step)) {
if ((1 << step) & (kmMaj9th|km11th|kmMaj13th))
ext += "add";
ext += kStepNames[step];
steps &= ~(1 << step);
}
//
// Root
//
if (fRootPitch != kNoPitch)
root = PitchName(fRootPitch, useSharps);
}
static const char * kLilypondStepNames[] = {
"", "", "sus2", "", "", "sus", "5-", "", "5+", "6", "7", "7+", "",
"9-", "9", "9+", "", "11", "11+", "", "13-", "13"
};
void VLChord::LilypondName(std::string & name, bool useSharps) const
{
name = LilypondPitchName(fPitch, useSharps);
char duration[16];
if (fDuration.fNum == 1 && !(fDuration.fDenom & (fDuration.fDenom-1)))
sprintf(duration, "%d", fDuration.fDenom);
else
sprintf(duration, "1*%d/%d", fDuration.fNum, fDuration.fDenom);
name += std::string(duration);
if (fPitch == kNoPitch)
return;
std::string ext;
uint32_t steps = fSteps;
//
// m / dim
//
if (steps & kmMin3rd)
if (steps & (kmDim5th|kmDim7th)
&& !(steps & (km5th|kmMin7th|kmMaj7th|kmMin9th|kmMaj9th|km11th|kmAug11th|kmMin13th|kmMaj13th))
) {
ext = "dim";
steps|= (steps & kmDim7th) << 1;
steps&= ~(kmMin3rd|kmDim5th|kmDim7th);
} else {
ext = "m";
steps&= ~kmMin3rd;
}
steps &= ~(kmUnison | km5th);
//
// Maj
//
if (steps & kmMaj7th) {
if (ext.size())
ext += '.';
ext += "maj";
if (steps & kmMaj9th) {
ext += "9";
steps &= ~kmMaj9th;
} else
ext += "7";
steps&= ~kmMaj7th;
}
//
// Sus
//
if (steps & (kmMaj2nd|km4th)) {
if (ext.size())
ext += '.';
ext += "sus";
if (steps & kmMaj2nd)
ext += "2";
else
ext += "4";
steps&= ~(kmMaj2nd|km4th);
}
//
// 6/9
//
if ((steps & (kmDim7th|kmMaj9th)) == (kmDim7th|kmMaj9th)) {
if (ext.size() && !isalpha(ext[ext.size()-1]))
ext += '.';
ext += "6.9";
steps&= ~(kmDim7th|kmMaj9th);
}
//
// Other extensions. Only the highest unaltered extension is listed.
//
if (uint32_t unaltered = steps & (kmMin7th | kmMaj9th | km11th | kmMaj13th)) {
steps &= ~unaltered;
for (int step = kMaj13th; step > kDim7th; --step)
if (unaltered & (1 << step)) {
std::string sn = kLilypondStepNames[step];
if (ext.size() && !isalpha(ext[ext.size()-1]) && sn.size())
ext += '.';
ext += sn;
break;
}
}
for (int step = kMin2nd; steps; ++step)
if (steps & (1 << step)) {
std::string sn = kLilypondStepNames[step];
if (ext.size() && !isalpha(ext[ext.size()-1]) && sn.size())
ext += '.';
ext += sn;
steps &= ~(1 << step);
}
if (ext.size())
name += ':' + ext;
//
// Root
//
if (fRootPitch != kNoPitch)
name += "/+" + LilypondPitchName(fRootPitch, useSharps);
}
//
// MMA supports a large but finite list of chords
//
static const VLChordModifier kMMAModifiers[] = {
{"", 0, 0},
{"+", _ kmAug5th, _ km5th},
{"11", _ kmMin7th | _ kmMaj9th | _ km11th, 0},
{"11b9", _ kmMin7th | _ kmMin9th | _ km11th, 0},
{"13", _ kmMin7th | _ kmMaj9th | _ km11th | _ kmMaj13th, 0},
{"5", 0, _ kmMaj3rd},
{"6", _ kmDim7th, 0},
{"69", _ kmDim7th | _ kmMaj9th, 0},
{"7", _ kmMin7th, 0},
{"7#11", _ kmMin7th | _ kmAug11th, 0},
{"7#5", _ kmMin7th | _ kmAug5th, _ km5th},
{"7#5#9", _ kmMin7th | _ kmAug5th | _ kmAug9th, _ km5th},
{"7#5b9", _ kmMin7th | _ kmAug5th | _ kmMin9th, _ km5th},
{"7#9", _ kmMin7th | _ kmAug9th, 0},
{"7#9#11", _ kmMin7th | _ kmAug9th | _ kmAug11th, 0},
{"7b5", _ kmMin7th | _ kmDim5th, _ km5th},
{"7b5#9", _ kmMin7th | _ kmDim5th | _ kmAug9th, _ km5th},
{"7b5b9", _ kmMin7th | _ kmDim5th | _ kmMin9th, _ km5th},
{"7b9", _ kmMin7th | _ kmMin9th, 0},
{"7sus", _ kmMin7th | _ km4th, _ kmMaj3rd},
{"7sus2", _ kmMin7th | _ kmMaj2nd, _ kmMaj3rd},
{"9", _ kmMin7th | _ kmMaj9th, 0},
{"9#11", _ kmMin7th | _ kmMaj9th | _ kmAug11th, 0},
{"9#5", _ kmMin7th | _ kmMaj9th | _ kmAug5th, _ km5th},
{"9b5", _ kmMin7th | _ kmMaj9th | _ kmDim5th, _ km5th},
{"9sus", _ kmMaj9th, 0},
{"M13", _ kmMaj7th | _ kmMaj13th, 0},
{"M7", _ kmMaj7th, 0},
{"M7#11", _ kmMaj7th | _ kmMaj9th | _ kmAug11th, 0},
{"M7#5", _ kmMaj7th | _ kmAug5th, _ km5th},
{"M7b5", _ kmMaj7th | _ kmDim5th, _ km5th},
{"M9", _ kmMaj7th | _ kmMaj9th, 0},
{"aug9", _ kmMin7th | _ kmMaj9th | _ kmAug5th, _ km5th},
{"dim3", _ kmMin3rd | _ kmDim5th, _ kmMaj3rd | _ km5th},
{"dim7", _ kmMin3rd | _ kmDim5th | _ kmDim7th, _ kmMaj3rd | _ km5th},
{"m", _ kmMin3rd, _ kmMaj3rd},
{"m#5", _ kmMin3rd | _ kmAug5th, _ kmMaj3rd | _ km5th},
{"m(maj7)", _ kmMin3rd | _ kmMaj7th, _ kmMaj3rd},
{"m(sus9)", _ kmMin3rd | _ kmMaj9th, _ kmMaj3rd},
{"m11", _ kmMin3rd | _ kmMin7th | _ kmMaj9th | _ km11th, _ kmMaj3rd},
{"m6", _ kmMin3rd | _ kmDim7th, _ kmMaj3rd},
{"m69", _ kmMin3rd | _ kmDim7th | _ kmMaj9th, _ kmMaj3rd},
{"m7", _ kmMin3rd | _ kmMin7th, _ kmMaj3rd},
{"m7b5", _ kmMin3rd | _ kmMin7th | _ kmDim5th, _ kmMaj3rd | _ km5th},
{"m7b9", _ kmMin3rd | _ kmMin7th | _ kmMin9th, _ kmMaj3rd},
{"m9", _ kmMin3rd | _ kmMin7th | _ kmMaj9th, _ kmMaj3rd},
{"m9b5", _ kmMin3rd | _ kmMin7th | _ kmMaj9th | _ kmDim5th, _ kmMaj3rd | _ km5th},
{"mM7", _ kmMin3rd | _ kmMaj7th, _ kmMaj3rd},
{"mb5", _ kmMin3rd | _ kmDim5th, _ kmMaj3rd | _ km5th},
{"sus", _ km4th, _ kmMaj3rd},
{"sus2", _ kmMaj2nd, _ kmMaj3rd},
{"sus9", _ kmMaj9th, 0},
{NULL, 0, 0}
};
void VLChord::MMAName(std::string & name, bool useSharps) const
{
VLFraction dur = fDuration;
int quarters = static_cast<int>(dur*4.0f+0.5f);
name = "";
if (!quarters--)
return;
if (fPitch == kNoPitch) {
name = '/';
} else {
std::string base, ext;
VLNote::Name(base, useSharps);
size_t best = 0;
size_t bestBits = 32;
size_t bestScore= 0;
for (size_t i=0; kMMAModifiers[i].fName; ++i) {
uint32_t steps = (kmUnison | kmMaj3rd | km5th)
| kMMAModifiers[i].fAddSteps
&~kMMAModifiers[i].fDelSteps;
if (fSteps == steps) {
//
// Exact match
//
best = i;
break;
}
steps ^= fSteps;
size_t bits=0;
size_t score=0;
for (uint32_t b=steps; b; b &= (b-1))
++bits;
for (size_t b=0; b<32; ++b)
if (steps & (1<<b))
score += 32-b;
if (bits < bestBits || (bits==bestBits && score < bestScore)) {
best = i;
bestBits = bits;
bestScore = score;
}
}
ext = kMMAModifiers[best].fName;
name = base+ext;
if (fRootPitch != kNoPitch)
name += '/' + PitchName(fRootPitch, useSharps);
std::toupper(base[0]);
size_t mod;
while ((mod = name.find("Maj")) != std::string::npos)
name.erase(mod+1, 2);
while ((mod = name.find(kVLSharpStr)) != std::string::npos)
name.replace(mod, 3, "#", 1);
while ((mod = name.find(kVLFlatStr)) != std::string::npos)
name.replace(mod, 3, "&", 1);
}
while (quarters--)
name += " /";
}
static VLFraction MaxNote(VLFraction d)
{
if (d >= 1)
return 1;
if (d.fNum == 1 && !(d.fDenom & (d.fDenom-1))) // Power of 2
return d;
VLFraction note(1,2);
VLFraction triplet(1,3);
for (;;) {
if (d >= note)
return note;
else if (d >= triplet)
return triplet;
note /= 2;
triplet /= 2;
}
}
static void TrimNote(VLFraction at, VLFraction & d, VLFraction grid)
{
if (at < grid && d > grid-at)
d = MaxNote(grid-at);
}
void VLProperties::PartialNote(VLFraction at, VLFraction totalDuration,
VLFraction * noteDuration) const
{
const VLFraction kBeat(1, fTime.fDenom);
at %= fTime;
*noteDuration = MaxNote(std::min(MaxNote(totalDuration), fTime-at)); // Don't extend past measure
if (at.fDenom > kBeat.fDenom) { // Break up notes not starting on beat
// Don't extend past "middle" of measure
if (fTime.fNum & 1) // Odd timecode, round up (most 5/4 seems to be 3+2, not 2+3)
TrimNote(at, *noteDuration, VLFraction((fTime.fNum+1)/2, fTime.fDenom));
else
TrimNote(at, *noteDuration, fTime / 2);
at %= kBeat;
if (at == 2*kBeat/3)
TrimNote(0, *noteDuration, kBeat); // Allow syncopated beats in swing
else
TrimNote(at, *noteDuration, kBeat);// Don't let other notes span beats
}
if (!(noteDuration->fDenom % 3) && *noteDuration != totalDuration && ((at+*noteDuration)%kBeat) > 0)
*noteDuration *= VLFraction(3,4); // avoid frivolous triplets
}
void VLProperties::VisualNote(VLFraction at, VLFraction actualDur,
VLFraction *visualDur, bool * triplet) const
{
bool swing= !(fDivisions % 3); // In swing mode?
VLFraction swung(3, fDivisions*8, true); // Which notes to swing
VLFraction swingGrid(2*swung); // Alignment of swing notes
if (*triplet = !(actualDur.fDenom % 3)) {
if (swing) { // Swing 8ths / 16ths are written as straight 8ths
if (actualDur == 4*swung/3 && (at % swingGrid) == 0) {
*visualDur = swung;
*triplet = false;
} else if (actualDur == 2*swung/3 && ((at+actualDur) % swingGrid) == 0) {
*visualDur = swung;
*triplet = false;
} else {
*visualDur = 4*actualDur/3;
}
} else {
*visualDur = 4*actualDur/3;
}
} else {
*visualDur = actualDur;
}
}
VLMeasure::VLMeasure()
: fProperties(0)
{
}
void VLMeasure::MMANotes(std::string & notes) const
{
VLFraction at(0);
VLNoteList::const_iterator i = fMelody.begin();
VLNoteList::const_iterator e = fMelody.end();
notes.clear();
for (; i!=e; ++i) {
std::string note;
i->MMAName(note, at, *fProperties);
if (notes.size())
notes += ' ';
notes += note+';';
at += i->fDuration;
}
}
void VLMeasure::MMAChords(std::string & chords) const
{
VLChordList::const_iterator i = fChords.begin();
VLChordList::const_iterator e = fChords.end();
chords.clear();
for (; i!=e; ++i) {
std::string chord;
i->MMAName(chord, fProperties->fKey >= 0);
if (chords.size())
chords += ' ';
chords += chord;
}
}
VLSong::VLSong()
{
const VLFraction fourFour(4,4);
VLProperties defaultProperties = {fourFour, 0, 1, 3};
fProperties.push_back(defaultProperties);
fMeasures.resize(32); // Leadin, AABA
VLNote rest = VLRest(1);
VLChord rchord;
rchord.fDuration = 1;
for (int i=0; i<32; ++i) {
fMeasures[i].fProperties = &fProperties.front();
fMeasures[i].fChords.push_back(rchord);
fMeasures[i].fMelody.push_back(rest);
}
}
//
// Deal with chords - a bit simpler
//
void VLSong::AddChord(VLChord chord, size_t measure, VLFraction at)
{
VLChordList::iterator i = fMeasures[measure].fChords.begin();
VLFraction t(0);
for (;;) {
VLFraction tEnd = t+i->fDuration;
if (tEnd > at) {
if (t == at) {
//
// Exact match, replace current
//
chord.fDuration = i->fDuration;
*i = chord;
} else {
//
// Overlap, split current
//
chord.fDuration = tEnd-at;
i->fDuration = at-t;
fMeasures[measure].fChords.insert(++i, chord);
}
break; // Exit here
}
t = tEnd;
++i;
}
}
void VLSong::DelChord(size_t measure, VLFraction at)
{
VLChordList::iterator i = fMeasures[measure].fChords.begin();
VLFraction t(0);
for (;;) {
if (t == at) {
//
// Found it. Extend previous or make rest
//
if (i != fMeasures[measure].fChords.begin()) {
//
// Extend previous
//
VLChordList::iterator j = i;
--j;
j->fDuration += i->fDuration;
fMeasures[measure].fChords.erase(i);
} else {
//
// Turn into rest
//
i->fPitch = VLNote::kNoPitch;
}
break;
}
VLFraction tEnd = t+i->fDuration;
if (tEnd > at)
break; // Past the point, quit
t = tEnd;
++i;
}
}
uint8_t & FirstTie(VLMeasure & measure)
{
VLNoteList::iterator i = measure.fMelody.begin();
return i->fTied;
}
uint8_t & LastTie(VLMeasure & measure)
{
VLNoteList::iterator i = measure.fMelody.end();
--i;
return i->fTied;
}
//
// Dealing with notes is similar, but we also have to handle ties
//
void VLSong::AddNote(VLNote note, size_t measure, VLFraction at)
{
VLNoteList::iterator i = fMeasures[measure].fMelody.begin();
VLFraction t(0);
for (;;) {
VLFraction tEnd = t+i->fDuration;
if (tEnd > at) {
if (t == at) {
//
// Exact match, replace current
//
if (i->fTied) {
//
// Break ties
//
if (i->fTied & VLNote::kTiedWithPrev)
LastTie(fMeasures[measure-1]) &= ~VLNote::kTiedWithNext;
if (i->fTied & VLNote::kTiedWithNext)
FirstTie(fMeasures[measure+1]) &= ~VLNote::kTiedWithPrev;
}
note.fDuration = i->fDuration;
*i = note;
} else {
//
// Overlap, split current
//
if (i->fTied & VLNote::kTiedWithPrev)
LastTie(fMeasures[measure-1]) &= ~VLNote::kTiedWithNext;
note.fDuration = tEnd-at;
i->fDuration = at-t;
i = fMeasures[measure].fMelody.insert(++i, note);
}
break; // Exit here
}
t = tEnd;
++i;
}
i->fTied = 0;
if (note.fTied & VLNote::kTiedWithPrev) // kTiedWithNext is NEVER user set
if (measure && i == fMeasures[measure].fMelody.begin()) {
VLNoteList::iterator j = fMeasures[measure-1].fMelody.end();
--j;
if (j->fPitch == i->fPitch) {
j->fTied |= VLNote::kTiedWithNext;
i->fTied |= VLNote::kTiedWithPrev;
}
}
}
void VLSong::DelNote(size_t measure, VLFraction at)
{
VLNoteList::iterator i = fMeasures[measure].fMelody.begin();
VLFraction t(0);
for (;;) {
if (t == at) {
//
// Found it. Break ties.
//
if (i->fTied & VLNote::kTiedWithNext)
FirstTie(fMeasures[measure+1]) &= ~VLNote::kTiedWithPrev;
if (i->fTied & VLNote::kTiedWithPrev)
LastTie(fMeasures[measure-1]) &= ~VLNote::kTiedWithNext;
//
// Extend previous or make rest
//
if (i != fMeasures[measure].fMelody.begin()) {
//
// Extend previous
//
VLNoteList::iterator j = i;
--j;
j->fDuration += i->fDuration;
fMeasures[measure].fMelody.erase(i);
} else {
//
// Turn into rest
//
i->fPitch = VLNote::kNoPitch;
i->fTied = 0;
}
break;
}
VLFraction tEnd = t+i->fDuration;
if (tEnd > at)
break; // Past the point, quit
t = tEnd;
++i;
}
}
static void TransposePinned(int8_t & pitch, int semi)
{
if (pitch == VLNote::kNoPitch)
return;
int pitchInOctave = pitch % 12;
int octave = pitch-pitchInOctave;
pitchInOctave += semi;
if (pitchInOctave < 0)
pitch = octave+pitchInOctave+12;
else if (pitchInOctave > 11)
pitch = octave+pitchInOctave-12;
else
pitch = octave+pitchInOctave;
}
void VLSong::Transpose(int semi)
{
for (int pass=0; pass<2 && semi;) {
int8_t low = 127;
int8_t high = 0;
for (size_t measure=0; measure<fMeasures.size(); ++measure) {
VLNoteList::iterator i = fMeasures[measure].fMelody.begin();
VLNoteList::iterator e = fMeasures[measure].fMelody.end();
for (; i!=e; ++i) {
if (i->fPitch == VLNote::kNoPitch)
continue;
i->fPitch += semi;
low = std::min(low, i->fPitch);
high = std::max(high, i->fPitch);
}
}
if (low < VLNote::kMiddleC-6 && high < VLNote::kMiddleC+7)
semi += 12; // Transpose an Octave up
else if (low > VLNote::kMiddleC+7 && high > VLNote::kMiddleC+16)
semi -= 12; // Transpose an Octave down
else
break; // Looks like we're done
}
for (size_t measure=0; measure<fMeasures.size(); ++measure) {
VLChordList::iterator i = fMeasures[measure].fChords.begin();
VLChordList::iterator e = fMeasures[measure].fChords.end();
for (; i!=e; ++i) {
TransposePinned(i->fPitch, semi);
TransposePinned(i->fRootPitch, semi);
}
}
}
void VLSong::LilypondNotes(std::string & notes) const
{
notes = "";
for (size_t measure=0; measure<fMeasures.size(); ++measure) {
VLNoteList::const_iterator i = fMeasures[measure].fMelody.begin();
VLNoteList::const_iterator e = fMeasures[measure].fMelody.end();
VLFraction at(0);
for (; i!=e; ++i) {
std::string note;
i->LilypondName(note, at, *fMeasures[measure].fProperties);
at += i->fDuration;
notes += note+" ";
}
notes += '|';
if (!(measure % 4)) {
char measNo[8];
sprintf(measNo, " %% %d", measure+1);
notes += measNo;
}
if (measure < fMeasures.size()-1)
notes += '\n';
}
}
void VLSong::LilypondChords(std::string & chords) const
{
chords = "";
for (size_t measure=0; measure<fMeasures.size(); ++measure) {
bool useSharps = fMeasures[measure].fProperties->fKey>=0;
VLChordList::const_iterator i = fMeasures[measure].fChords.begin();
VLChordList::const_iterator e = fMeasures[measure].fChords.end();
for (; i!=e; ++i) {
std::string chord;
i->LilypondName(chord, useSharps);
chords += chord+" ";
}
if (!(measure % 4)) {
char measNo[8];
sprintf(measNo, " %% %d", measure+1);
chords += measNo;
}
if (measure < fMeasures.size()-1)
chords += '\n';
}
}
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