mirror of
https://github.com/microtherion/VocalEasel.git
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383 lines
9.3 KiB
C++
383 lines
9.3 KiB
C++
//
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// File: VLLilypondWriter.h
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//
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// Author(s):
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//
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// (MN) Matthias Neeracher
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//
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// Copyright © 2007 Matthias Neeracher
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//
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#include "VLLilypondWriter.h"
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void VLLilypondWriter::Visit(VLSong & song)
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{
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fSong = &song;
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fChords.clear();
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fMelody.clear();
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fLyrics.clear();
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fLyrics.resize(song.CountStanzas());
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fL = fLyrics;
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fInPickup = true;
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fIndent.clear();
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fSeenEnding = 0;
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fNumEndings = 0;
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fLastProp = 0;
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VisitMeasures(song, false);
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//
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// Terminate melody
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//
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if (fIndent.size())
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fMelody += fSeenEnding ? "}}\n" : "}\n";
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}
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void VLLilypondWriter::VisitMeasure(size_t m, VLProperties & p, VLMeasure & meas)
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{
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char measNo[8];
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if (!(m % 4))
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sprintf(measNo, " %% %d", m+1);
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else
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measNo[0] = 0;
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fUseSharps = p.fKey > 0;
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fInPickup = fInPickup && !m && meas.NoChords();
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//
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// Generate chords
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//
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fAccum.clear();
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VisitChords(meas);
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fAccum += measNo;
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fChords+= fAccum + '\n';
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fAccum.clear();
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//
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// Generate key/time if changed
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//
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if (!fLastProp || fLastProp->fTime != p.fTime) {
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char time[16];
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sprintf(time, "\\time %d/%d\n", p.fTime.fNum, p.fTime.fDenom);
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fAccum += fIndent+time;
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}
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if (!fLastProp || fLastProp->fKey != p.fKey || fLastProp->fMode != p.fMode) {
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const int kMajorOffset = 6;
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const int kMinorOffset = 9;
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static const char * sKeyNames[] = {
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"ges", "des", "as", "es", "bes", "f",
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"c", "g", "d", "a", "e", "b", "fis", "cis", "gis"
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};
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char key[16];
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if (p.fMode < 0)
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sprintf(key, "\\key %s \\minor\n", sKeyNames[p.fKey+kMinorOffset]);
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else
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sprintf(key, "\\key %s \\major\n", sKeyNames[p.fKey+kMajorOffset]);
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fAccum += fIndent+key;
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}
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fLastProp = &p;
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//
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// Generate structure elements
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//
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int times;
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size_t volta;
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bool repeat;
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bool hasBarLine = false;
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if (meas.fBreak == VLMeasure::kNewPage) {
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fAccum += fIndent+"\\pageBreak\n";
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hasBarLine = true;
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} else if (meas.fBreak == VLMeasure::kNewSystem) {
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fAccum += fIndent+"\\break\n";
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hasBarLine = true;
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}
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if (fSong->DoesEndRepeat(m)) {
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fAccum += "}\n";
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fIndent = "";
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hasBarLine = true;
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}
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if (fSong->DoesBeginEnding(m, &repeat, &volta)) {
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fAccum += fSeenEnding ? "}{\n" : "} \\alternative {{\n";
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fAccum += " \\set Score.repeatCommands = #'((volta \"";
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const char * comma = "";
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for (int r=0; r<8; ++r)
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if (volta & (1<<r)) {
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char volta[8];
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sprintf(volta, "%s%d.", comma, r+1);
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comma = ", ";
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fAccum += volta;
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}
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fAccum += "\")" + std::string(repeat ? "" : " end-repeat") + ")\n";
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fSeenEnding |= volta;
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++fNumEndings;
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hasBarLine = true;
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} else if (fSong->DoesEndEnding(m, &hasBarLine)) {
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fAccum += "}}\n";
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fIndent = "";
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}
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if (fSong->DoesBeginRepeat(m, ×)) {
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char volta[8];
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sprintf(volta, "%d", times);
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fAccum = fAccum + "\\repeat volta "+volta+" {\n";
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fIndent = " ";
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fSeenEnding = 0;
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fNumEndings = 0;
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hasBarLine = true;
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}
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fAccum += fIndent;
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if (fSong->fCoda == m) {
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if (!hasBarLine)
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fAccum += "\\bar \"|.\" ";
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fAccum += "\\break \\mark \\markup { \\musicglyph #\"scripts.coda\" }\n"
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+ fIndent;
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}
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fMelody += fAccum;
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//
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// Generate melody & lyrics
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//
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fAccum.clear();
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for (size_t stanza=0; stanza<fL.size(); ++stanza)
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fL[stanza].clear();
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fPrevNote.fPitch = VLNote::kNoPitch;
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VisitNotes(meas, p, true);
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//
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// Consolidate triplets and dots
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//
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size_t trip;
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while ((trip = fAccum.find("} \\times 2/3 { ")) != std::string::npos)
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fAccum.erase(trip, 15);
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while ((trip = fAccum.find(" ~ } \\times 2/3 { ")) != std::string::npos)
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fAccum.erase(trip+2, 17);
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while ((trip = fAccum.find(" ~.")) != std::string::npos)
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fAccum.erase(trip, 2);
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if (fSong->fGoToCoda == m+1)
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fAccum += "\n"
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+ fIndent
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+ "\\mark \\markup { \\musicglyph #\"scripts.coda\" } |";
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else
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fAccum += " |";
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fMelody += fAccum + measNo + '\n';
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//
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// Accumulate lyrics
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//
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const char * nuline = m%4 ? "" : "\n";
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for (size_t stanza=0; stanza<fLyrics.size(); ++stanza)
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fLyrics[stanza] += fL[stanza] + nuline;
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}
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static const char kScale[] = "c d ef g a b";
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static const char kValue[] = {
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1, 2, 4, 8, 16, 32
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};
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static std::string LilypondPitchName(int8_t pitch, bool useSharps)
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{
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if (pitch == VLNote::kNoPitch)
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return "r";
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pitch %= 12;
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if (kScale[pitch] != ' ')
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return kScale[pitch] + std::string();
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else if (useSharps)
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return kScale[pitch-1] + std::string("is");
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else
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return kScale[pitch+1] + std::string("es");
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}
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static std::string EscapeSyllable(std::string syll)
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{
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for (size_t i=0; i<syll.size(); ++i)
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if (isalpha(syll[i]))
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continue;
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else
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switch (syll[i]) {
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case '-':
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case ':':
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case '.':
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case ',':
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case ';':
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case '\'':
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case '_':
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continue;
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default:
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goto escape;
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}
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//
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// Purely alphabetic syllable, no need to escape.
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//
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return syll;
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escape:
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size_t q=0;
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while ((q = syll.find_first_of('"', q)) != std::string::npos) {
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syll.replace(q, 1, "\\\"", 2);
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q += 2;
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}
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q = 0;
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while ((q = syll.find_first_of('_', q)) != std::string::npos) {
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syll.replace(q, 1, "\"_\"", 3);
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q += 3;
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}
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return '"'+syll+'"';
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}
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static bool PreferSharps(bool globalSharps, int noteAccidentals)
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{
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return (noteAccidentals & VLNote::kAccidentals)
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? (noteAccidentals & VLNote::kWantSharp)
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: globalSharps;
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}
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void VLLilypondWriter::VisitNote(VLLyricsNote & n)
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{
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std::string nm =
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LilypondPitchName(n.fPitch, PreferSharps(fUseSharps, n.fVisual));
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if (n.fPitch != VLNote::kNoPitch) {
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int ref = VLNote::kMiddleC-VLNote::kOctave;
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for (int ticks = (n.fPitch-ref)/VLNote::kOctave; ticks>0; --ticks)
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nm += '\'';
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for (int commas = (ref-n.fPitch)/VLNote::kOctave; commas>0; --commas)
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nm += ',';
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fInPickup = false;
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} else if (fInPickup) {
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nm = "s";
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}
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const char * space = fAccum.size() ? " " : "";
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const char * tie = n.fTied & VLNote::kTiedWithNext ? " ~" : "";
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char duration[32];
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if (n.fTied == VLNote::kTiedWithPrev && n.fVisual == fPrevNote.fVisual+1
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&& n.fPitch == fPrevNote.fPitch
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)
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strcpy(duration, ".");
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else if (n.fVisual & VLNote::kTriplet)
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sprintf(duration, "%s\\times 2/3 { %s%d%s }",
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space, nm.c_str(), kValue[n.fVisual & VLNote::kNoteHead], tie);
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else
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sprintf(duration, "%s%s%d%s",
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space, nm.c_str(), kValue[n.fVisual & VLNote::kNoteHead], tie);
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fAccum += duration;
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fPrevNote= n;
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if (n.fPitch != VLNote::kNoPitch && !(n.fTied & VLNote::kTiedWithPrev))
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for (size_t i=0; i<fL.size(); ++i)
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if (n.fLyrics.size() <= i || !n.fLyrics[i]) {
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fL[i] += " \\skip1";
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} else {
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fL[i] += ' ' + EscapeSyllable(n.fLyrics[i].fText);
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if (n.fLyrics[i].fKind & VLSyllable::kHasNext)
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fL[i] += " --";
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}
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}
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static const char * kLilypondStepNames[] = {
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"", "", "sus2", "", "", "sus", "5-", "", "5+", "6", "7", "7+", "",
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"9-", "9", "9+", "", "11", "11+", "", "13-", "13"
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};
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void VLLilypondWriter::VisitChord(VLChord & c)
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{
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std::string name =
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LilypondPitchName(c.fPitch, PreferSharps(fUseSharps, c.fVisual));
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char duration[16];
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if (c.fDuration.fNum == 1 && !(c.fDuration.fDenom & (c.fDuration.fDenom-1))) // Power of two
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sprintf(duration, "%d", c.fDuration.fDenom);
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else
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sprintf(duration, "1*%d/%d", c.fDuration.fNum, c.fDuration.fDenom);
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name += std::string(duration);
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std::string ext;
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uint32_t steps = c.fSteps;
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if (c.fPitch == VLNote::kNoPitch)
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goto done;
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//
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// m / dim
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//
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if (steps & VLChord::kmMin3rd)
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if (steps & (VLChord::kmDim5th|VLChord::kmDim7th)
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&& !(steps & (VLChord::km5th|VLChord::kmMin7th|VLChord::kmMaj7th|VLChord::kmMin9th|VLChord::kmMaj9th|VLChord::km11th|VLChord::kmAug11th|VLChord::kmMin13th|VLChord::kmMaj13th))
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) {
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ext = "dim";
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steps|= (steps & VLChord::kmDim7th) << 1;
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steps&= ~(VLChord::kmMin3rd|VLChord::kmDim5th|VLChord::kmDim7th);
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} else {
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ext = "m";
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steps&= ~VLChord::kmMin3rd;
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}
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steps &= ~(VLChord::kmUnison | VLChord::km5th);
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//
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// Maj
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//
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if (steps & VLChord::kmMaj7th) {
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bool hasMinor = ext.size();
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ext += hasMinor ? "7+" : "maj";
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if (steps & VLChord::kmMaj9th) {
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ext += hasMinor ? ".9" : "9";
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steps &= ~VLChord::kmMaj9th;
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} else
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ext += hasMinor ? "" : "7";
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steps&= ~VLChord::kmMaj7th;
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}
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//
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// Sus
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//
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if (steps & (VLChord::kmMaj2nd|VLChord::km4th)) {
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if (ext.size())
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ext += '.';
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ext += "sus";
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if (steps & VLChord::kmMaj2nd)
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ext += "2";
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else
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ext += "4";
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steps&= ~(VLChord::kmMaj2nd|VLChord::km4th);
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}
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//
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// 6/9
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//
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if ((steps & (VLChord::kmDim7th|VLChord::kmMaj9th)) == (VLChord::kmDim7th|VLChord::kmMaj9th)) {
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if (ext.size() && !isalpha(ext[ext.size()-1]))
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ext += '.';
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ext += "6.9";
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steps&= ~(VLChord::kmDim7th|VLChord::kmMaj9th);
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}
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//
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// Other extensions. Only the highest unaltered extension is listed.
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//
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if (uint32_t unaltered = steps & (VLChord::kmMin7th|VLChord::kmMaj9th|VLChord::km11th|VLChord::kmMaj13th)) {
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steps &= ~unaltered;
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for (int step = VLChord::kMaj13th; step > VLChord::kDim7th; --step)
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if (unaltered & (1 << step)) {
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std::string sn = kLilypondStepNames[step];
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if (ext.size() && !isalpha(ext[ext.size()-1]) && sn.size())
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ext += '.';
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ext += sn;
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break;
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}
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}
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for (int step = VLChord::kMin2nd; steps; ++step)
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if (steps & (1 << step)) {
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std::string sn = kLilypondStepNames[step];
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if (ext.size() && !isalpha(ext[ext.size()-1]) && sn.size())
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ext += '.';
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ext += sn;
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steps &= ~(1 << step);
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}
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if (ext.size())
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name += ':' + ext;
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//
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// Root
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//
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if (c.fRootPitch != VLNote::kNoPitch)
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name += "/+" + LilypondPitchName(c.fRootPitch, fUseSharps);
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done:
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if (fAccum.size())
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fAccum += ' ';
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fAccum += name;
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}
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