X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=TODO;h=fba7831c56a5f24ba5cf6b0c7e6adbda63368e97;hb=48f2b9351f93d0161c675cfb60e95bf919041df2;hp=029a6293d75f15726e484c44c5d022575e82b36b;hpb=9e90e53ba3a141e1e4f4a32ccaa7b36b0daecf1a;p=lilypond.git diff --git a/TODO b/TODO index 029a6293d7..fba7831c56 100644 --- a/TODO +++ b/TODO @@ -1,228 +1,226 @@ -*-outline-layout:(2 (-1 -1 0 :) 0);outline-stylish-prefixes:nil -*- + * GNU LilyPond TODO -Features you cannot find in the doco as working, should be +Features you cannot find in the documentation as working, should be mentioned here. This is an assorted collection of stuff that will be -done, might be done, or is an idea that I want to think about - +done, might be done, or is an idea that we want to think about. Most of the items are marked in the code as well -Grep for TODO and ugh/ugr/urg. - -.* BUGS -. * AFM for BlueSky AFM files. -. * staff size for post/prebreaks -. * .ly files -. * input/star-spangled-banner -. * mutopia/J.S.Bach/wtk1-fugue2.ly -. * input/test/grace -. * fix: text on rests: ridiculous dims -. * \score { \notes { c8 c8 c8 c c c } -\paper { \translator { \VoiceContext \remove "Auto_beam_engraver";}} -} -. * m=\notes\relative c'''{ - \time 2/4; - - R2*4 | c2 | c2 | c2 | c2 | c2 | c2 | c2 | c2 | c2 | \break - <{R2*10}{s2 \mark "A"; }> | % Too narrow space for the first rest in -1.1.29 - r4 r8 [g16 \p ( a ] | -[ ) g8-. fis16 ( g ][ ) fis8-. f16 ( g ] | -[ ) f8-. e16 ( f ][ ) e8-. es16 ( f ] | -[ ) es8 \f c16 ( d][es8 d16 c ] | -) d4 r8 [g16 \p ( a ] | -[ ) g8-. fis16 ( g ][ ) fis8-. f16 ( g ] | \break -) c2 | c2 | c2 | c2 | c2 | c2 | c2 | c2 | c2 | -} - -\score{ - \m - \paper{ - \translator{ - \ScoreContext - SkipBars = 1; - } - \translator { - \OrchestralPartStaffContext - } - } -} -. * midi key. -. *P.P.S. It can be cool in mudela-book to distinguish in pre,postMudelaExample, -whether MudelaExample is epsed or not: ( if this fragment is floating eps, than 1, -otherwise 2). say preMudelaExample[eps]{}, and change it in document body sometimes. - -. * tetex: mfplain.mem -. * fix singleStaffBracket -. * declare performers in \midi -. * fix MIDI -. * \shape 1st dim skipped? -. * turn slope-damping on/off -. * tremolo stuff -. * fix height of / collisions with lyrics (chords), - see input/test/vertical-text.ly; input/test/repeat.ly -. * We need feta-din*.mf files for more sizes than 10. -. * latex bla.tex broken (titles / \lilyfooter stuff?) -. * fix dynamics decently, ie. use kerning & ligatures. -. * support_l_arr_ empty in staff-margin's G_staff_side_item -. * minVerticalAlign for StaffGroups. -. * fix OrchestralScore and Hara-kiri (i.e., fix Coriolan) -. * Phrasing: Indicating the textual underlay of a piece, or -otherwise dividing a piece into phrases. - -There are distinct ways of specifying the first two (although at -present, they're not properly distinguished) but no distinct way to -specify the third. Should there be? - -.* TODO before 1.2 -. * break priority setting from SCM. -. * Gade score -. * remove [] in favour of auto-beamer -. * The minimum distance between different staffs works only within - StaffGroups, not between StaffGroups. The Gade Score looks quite - strange on the pages where the Timpani and/or Brass sections don't - play. I've set the minimum distance with: - \translator { - \OrchestralScoreContext - minVerticalAlign = 2.5*\staffheight; - } -. * hangOnClef with non-breakable clefs. -. * Aha, the problem is the new TeX code generation for changing fonts. -> (The explanation below is mostly intended for Han-Wen and Jan) -> Before, the font was changed with macros declared separately for -> pure TeX and LaTeX, but now all the fonts are declared directly in -> the generated code using the low-level TeX commands. This circumvents -> the fontencoding mechanism of LaTeX and is a potential source of -> problems also for us users of the Latin-1 character set. -> I think it still works since the inputencoding latin1 is -> declared by ly2dvi, but it still means that e.g. an o with -> umlaut is typeset as a combination of the two symbols 'o' and -> 'umlaut' instead of as a single character, as would be the case -> if fontencoding OT1 had been used. This shouldn't give any -> difference in layout, though. One of the main argument for using -> fontencoding OT1 is for the hyphenation mechanism to work, an -> argument that's clearly irrelevant in our application. Yet we -> see the problem for August. -. * Check gcc 2.8.1 compatibility -. * Abstraction for engravers: -. * make "in-between" engraver (Tie, Extender) -. * make wide_spanner_engraver (line_group_spanne,r staff_symbol) -. * remove Interval dim_ from Dimension_cache and rename the struct. -. * merge align_element and axis_element_group. -. * do scaled fonts generally -. * The Lilypond accidental symbols are available through the TeX macros, -\textflat, \textsharp and \textnatural defined in the init file -lilyponddefs.tex. All the symbols are defined in the files fetaXX.tex -where XX corresponds to the size. I don't know where (or even if) they -are installed but they are generated in the mf/out/ directory during the -compilation. -. * make dependencies () a virtual function. -. * fix Repeated_music design -. * one big ly2dvi input that includes *all* tests. -. * store req -> element, element -> element causes for warnings -. * junk Text_def, use G_text_item in stead. -. * junk Script_def -. * include examples in RPM. -. * fix partial measures in meaningful way. -. * working notehead style. -. * add scripts to bars eg. |^"bla" -. * relative mode for mi2mu -. * uniformise recent feta contributions. -. * use SCM and Molecules for {accordeon stuff, } -. * bigger and fatter 4/4 C -. * sort out directory stuff. -. * --prefix option? -. * -I option per filetype? -. * kpathsea? +Grep -i for TODO, FIXME and ugh/ugr/urg. + +.* TODO +. * use hash tabs iso. alist_ for elt property? +. * tremolos. +. * internationalize GUILE msgs. +. * unbroken marks. +. * put property test files in refman. +. * fix slurdotted +. * alignment within @itemize +. * slur dashing. +. * junk dstream output. +. * agressive type-checking for SCM stuff. +. * script columns +. * Must stop before this music ends: +verse=\lyrics { +. * input/bugs/clef.sly: clef changes go missing +. * input/test/grace.sly: wierd big spacing on grace notes +. * TODO^2: +. * make a TODO.texi, like http://www.gnu.org/software/guile/ideas.html +. * make this file understandable for 3rd parties. +. * \accepts -> \acceptedby +. * context in embedded SCM errors. +. * acc at tied note after linebreak. +. * fix font-naming and selecting +. * barcheck warning doesn't resync anymore +. * provide settable/invisible span-score-bar bracket +. * add context information to warnings +Paper: +waarschuwing: Kan niet beide uiteinden van bindingsboog vinden +MIDI: +pa.ly:33:23: waarschuwing: Schroot verzoek: `Span_req': + g' a4 bes8 \grace f8( + )es16 d es8 r c | +. * sparse ties. +. * chord tonic: placement of accidental C#, Cb (from scm and C++) +. * note head on stem err msg in dutch. +. * why need to run -C mf twice? +. * here's no difference at all in output. When either is jacked up to 7.0, +everything works and matches up; when either is set just a bit above the +default 5.0 (5.4 is what I was hoping to use), stems miss note heads. So +it's some sort of a numerical (truncation/roundoff) problem. +John +. * fix #'margin-shape; setting indent to 0 with \shape fails +. * Fixed size staff/system heights; +. * ly2dvi : don't repeat opus if same. +. * hara kiri _8 clef. +. * junk -M ? +. * mudela-book doco +. * fix or replace feta-accordion.mf +. * bracket pdf hack +. * Mondrup: +- if I change the property minVerticalAlign in a multi staff score with +lyrics the change affects the lyrics too. I would like the change to +_only_ affect staves. + +- I would like to be able to influence the sloping of xtuplet brackets + +- after the leading measure in the above mentioned score I want a double +bar line fully drawn across the staves and after that keep to the +ChoirStaff bar line types in the rest of the scores +. * Write script that uses --find-old-relative to do auto relativization. + + +.* Cleanups needed +. * \$ and $ identifier syntax in examples. +. * Key_engraver, Local_key_item +. * Think of comprehensive solution for "if (grace_b == self_grace_b_)" +. * String[String.length] doesn't trap. +. * Rhythmic_column and interaction stem/rhythmic_column/note_head/dots. +. * clef engraver +. * parser +. * Lookup::text -> needs to be TeX independent. +. * junk Music_iterator::first_b_ + +.* ACCIDENTALS +. * half-sharps, half-flats +. * adaptive accidental spacing. +. * accidentals closer to note head + + +.* BEAMS +. * [c8. c16 c16 c16] in 6/8 timesig. +. * Rewrite Stem, Beam (hairy) +. * beams over barlines +. * Rests and beams don't work too well together. Example: + [ r8 g''16 des'] [r8 c16 a] +. * autoBeamMelisma: if I explicitly beam notes in a staff with auto +beaming disabled I would like to have these beams also to be +melismatic. +. * The stemLength property should affect also beamed stems. +. * staffside spanner (crescendo!) along with staffswitch. +. * * auto melismaBusy for beams. + +. * +> \context Staff < +> {\voiceone''4. r8} +> \voicetwo c,4 r4} +> > +. * sort out breve shapes. +. * \time forces keysig? +.* STUFF +. * We need feta-din*.mf files for more sizes than 10. +. * align left edge of broken tuplet-spanner (have a test case?) +. * fix dynamics decently, ie. use kerning & ligatures. +. * key restorations & repeats +. * paperXX.ly \quartwidth, font setting not up to date. (Should read from AFM?) +. *In Caro Mio Ben, bar 8, there's a syllable that starts on a note, and +ends on a pair of grace notes. Standard practice is to mark this with +a slur starting on the main note and ending on the grace note, so a +singer knows where to break the words. + +In bar 27, there's a crescendo that's supposed to start at the start +of the grace notes and extend to the note after the grace notes. +. * 4. Lyrics and grace sections don't go too well together. + The words are aligned with the main note, not the start of the + grace note. This is usually wrong, but is sometimes right. +. * tie-direction +. * repeats and partial measures. +. * rhythmic staff & accidentals. +. * use melismaBusy in Lyric context to typeset melismata correctly. . * ly2dvi/lilypond logfile. -. * How can I specify a chord whose duration is longer than a whole note? - \type ChordNames { \chord{ A1*2-min } } - -gives me a parse error. And \times doesn't work either. I can't use -a spacer note. So it seems to be impossible to have long chords of -general length. Of course, in the example above I can use \breve. -But what if I want a chord that lasts for 3 whole notes? Or what -about 2.5 whole notes? Is there a mechanism for getting this kind of -length? - - - -. * fractional chord durs. . * hang Item on Spanner . * do --safe for PS output? -. * convert-mudela --output -. * Staff_margin (with a partial measure.) -. * fix pletvisibility properties: -. * bracket on/off/no-bracket-when-beam -. * num on/off/no-num-when-beam -. * fix: standchen. -. * junk text{sharp,flat,etc} -. * fix convert-mudela manpage -. * decimal point in \paper {} -. * { \voiceone [g''8 fis'' e''] d''4 |} - and=20 - { \voicetwo d'4 d'2.*2/3 } spacing -. * tied notes for MIDI -. * sharp /flat on trills (in MIDI ??) -. * scm-ify \property values. -. * move class Lookup {} into scm . * msgfmt -o check? -. * \breathmark TeX macro -. * add new glyphs to font.ly -. * formatting of input stuff. -. * \notes{ a \< b \cr } vs \notes{ a \< b \! } -. * space after bars? -. * 'hinterfleisch' before bar (e.g. wtk1-fugue2)? -. * Summary of minor spelling irregularities: -. * capitalization/use of underscores in property names -. * fix SkipBars -> skipBars -. * broken scripts: - lbheel = \script { "bheel" 0 0 -1 0 0 } - rbheel = \script { "bheel" 0 0 1 0 0 } - lbtoe = \script { "btoe" 0 0 -1 0 0 } - rbtoe = \script { "btoe" 0 0 1 0 0 } - lfheel = \script { "fheel" 0 0 -1 0 0 } - rfheel = \script { "fheel" 0 0 1 0 0 } - lftoe = \script { "ftoe" 0 0 -1 0 0 } - rftoe = \script { "ftoe" 0 0 1 0 0 } - and also - portato= \script { "portato" 0 -1 0 1 0 } -. * ly2dvi -. * bottomnote for ly2dvi -. * deps for ly2dvi -.* STUFF +. * collision of lyrics with span_bars. See star-spangled. +. * It is impossible to typeset two textual scripts that are stacked + on top of eachother and avoids note collisions and at the same + time are typeset with different textStyle. I tried to move around + the text_engraver and other engravers between Voice and Thread + but the granularity is not fine enough, the scripts have to + share the same engraver in order to be get correct vertical + position but than they cannot have different style. + In my opinion, all scripts that share the same staff, should + be stacked vertically, avoiding collisions with the notes + in all voices. + +. * Matanya's tips: +. * don't shorten stems/staffs closer to each other. +. * to space the staffs/staffgroups contained in the score. +. * heavier beams? + +. * tuplets that are written as "number : note", for example + "3 : [image of a half note here]". possible? +. * a note with a circle after it, meaning: + + note + circle = note + 1/4 of its length + + the circle is like a dot that's not filled in. for example, on + page three, the c-sharp on the second line should be a quarter with + a circle, not a quarter tied to a sixteenth. is this at all + possible with lily? +. * make dependencies () a virtual function. +. * deprecate hangOnClef. +. * Abstraction for engravers: +. * make "in-between" engraver (Tie) +. * make wide_spanner_engraver (line_group_spanner, staff_symbol) +. * store req -> element, element -> element causes for warnings . * compulsory hshift +. * My wish list for lyrics. I dream of a time when I will have enough time to +become familiar enough with the source code to be able to implement some of +these myself, but I don't know when that will be, so I thought I'd "publish" +my suggestions in case someone else is in a position to give them some +priority. Otherwise, perhaps they could go on the todo list? + +If any of these are already implemented, please let me what the syntax is to +use them! + +1. Stanza numbering. Numbering at the beginning of a song with the number +set to the left of the first note. It would also be nice (but not as +important) to be able to have some form of automatic numbering at the +beginning of each new line. This would make it easier to follow songs with a +large number of stanzas. + +3. Notes centred above/below lyrics rather than left-aligned. + +4. It would be very nice to be able to build some kind of phrasing into the +lyrics of hymns, etc, so that the first words of a phrase are left aligned +with each other, the last words are right aligned, and the words in between +are centred. + +5. In a song, with (say) four stanzas and a chorus, it would be nice to be +able to vertically align the chorus midway between the staves. + +6. It would be nice to be able to put vertical brackets either side of a +repeated section with different words for each repeat. +. * Give # lines in linebreaking. . * arrows on slurs. +. * rewrite context defs using Scheme +. * junk TeX specifics from internal code. +. * \selectmusic to cut pieces from music. +. * formatting of input stuff. +. * deps for ly2dvi +. * TODO: merge atom & molecule; make tree from molecule. . * Align_element::padding ? -. * uniformise property names... -. * ydirection <-> yDirection -. * rather allow '_' in identifiers first (i.e. junk ^ and _), - and do y_direction? -. * typo checks on property names? . * use streambufs and iostream - to provide IO handling for TeX stream, mudela stream, data-file. +to provide IO handling for TeX stream, mudela stream, data-file. . * seriously buffer TeX output (do profile of writing .5 mb TeX file.) -. * strip EXEs before installing -. * zip target for binary windows dist (JBR) +. * fix partial measures in meaningful way. +. * uniformise recent feta contributions. +. * bigger and fatter 4/4 C +. * relative mode for midi2ly . * junking \skip req in lyrics -. * percussion note heads -. * mi2mu empty staffs. +. * midi2ly empty staffs. +. * use Fourier transformation for rhythmic quantisation. . * horizontal centering of dynamics . * $DEPENDENCIES_OUTPUT support -. * Xdvi zooming ?! Try to understand GS garbage collection. -gs: Error: /undefined in draw_beam -gs: Operand stack: +. * turn slope-damping on/off +. * sort out directory stuff. +. * --prefix option? +. * -I option per filetype? +. * kpathsea? . * fix vertical alignment and stafflines . * declaring Performers -. * GrandStaff needs more work -- I want a single word - `harpsichord' to the left of the grandstaff, not one on each - stave. (Organ staff -- with separate pedal -- but common - properties may be something to think about. Of course for - organ you want to be able to give stop indications on the way - through, so the \property Voice.Instrument would be a stop, - and \property GrandStaff.instrument would be PipeOrgan...) -. * revise the Score_priority_align_engraver concept. It sucks. -. * *.yo: fix pod manpage layout legacy . * text-items clash with stems/beams . * --include, -I option for ly2dvi (pass on to lily) . * fix placement of beam-less abbrev @@ -235,67 +233,46 @@ gs: Operand stack: * { a4 a16 } c <-- duration of c? * < a4 b8 > c <-- duration of c? . * \tempo 4. = 90; -. * fix audio-items (don't use (input) requests, but copy data) . * make sure all ex's have a mudela-version . * do rest-collisions for Multi_measure_rests as well. . * split error/warning in error/warning/non_fatal_error . * add a Duration_convert member to Duration_iter to set parameters. Junk global duration settings. -. * en-,discouraged linebreaking: -. * handle DISALLOW < penalty > FORCE . * discourage breaking of slurs . * fix variable define/lookup parser global<->paper . * fix title/instrument placements; see input/test/title.ly . * <\voiceone c4. \voicetwo c4> -. * add full cello suites to web site (kom op, Maarten!) -. * Rethink Time_description -\cadenza , \meter, \grouping should all be \properties +. * I'd like to change the \repetitions command to Jan's suggested + syntax: \repeat "repeatsymbol" 2 {...}, but I'm not sure that + I understand the implementation of repeats well enough. +. * add mudela-book-doc source to webstie. +. * fix singleStaffBracket . * rename -. * measure -> bar -. * abbrev -> tremolo -. * abbreviation-beam -> (measured/unmeasured) tremolo . * partial -> anacrouse -. * shared lib -. * robustify Beam (in case of no stems, 32nd notes) -. * decentralised spring factory . * move paper vars into engraver properties -. * check for groff / troff/ nroff et +. * add new glyphs to font.ly . * more intelligent file searching . * disable spaces in TeX stuff . * handle ^C for tmp/file creation. . * make LilyPond RPM fully relocatable -. * dots & rest collisions. -. * documentation -. * remove links to non-free SW. -. * internal documentation -. * a general paper. -. * \properties -. * left/rightbeamcount -. * various other new properties. -. * introduction? -. * info? -. * LaTeX? -. * more manpages? -. * the warning about the negative slur/tie length appears twice -which is irritating. . * better hshift (dots, distance, head dependent) +. * didot / big point. . * clefs (AG): The "8" should appear closer to the actual clef, touching it. . * put errorlevel in Input class . * junk nesting slurs -. * integrate midi-elts from mi2mu and lily? + .* FONT . * the bracket is ugly (wings are too parabolic, should be more circular) . * versioning for Feta +. * rewrite dynamic signs. They're kind of spaghetti now. . * The `3' in the meter key is a one or two pixels too thin (at 600dpi) in the middle: . * design macro for penstroke with rounded endings . * timesig C: fat yet less curved. Check out relations. . * design decent macro for bulbed endings . * printer dependencies. -. * y-refpoint for rests should be the 4th staffline (gclef: b') -. * clean-up eight+ rests . * versioning . * lo-res fixes. . * work out sizes of character fonts. @@ -305,23 +282,55 @@ touching it. . * coda signs: Segno, O+ . * glissando, arpeggio . * lengthened trill -. * 128th flags . * include important spacing dims in fetalog +. * scalability: use blot_diameter everywhere, make font chubbier for + small sizes. + .* 3RD PARTY BUGS -. * GNU diff 2.7: diff -rN does not see a new directory with empty file +. * UMR: Uninitialized memory read + This is occurring while in: + qst [qsort.c] + qsort [libc.so.1] + Keyword_table::Keyword_table(Keyword_ent*) [keyword.cc:28] + My_lily_lexer::My_lily_lexer() [my-lily-lexer.cc:78] + My_lily_parser::parse_file(String,String) [my-lily-parser.cc:54] + do_one_file(String,String) [scores.cc:124] + Reading 4 bytes from 0xefffeca8 on the stack. + Address 0xefffeca8 is 728 bytes below frame pointer in function +. * Array axeses; + + for (int i=0; i < loose_elems.size (); i++) + { + Score_element* elt = loose_elems[i]; + /* + with which axes do we have to meddle? + */ + int j =0; + Axis as [2]; + for (int a = X_AXIS; a < NO_AXES; ++a) + if (elt->parent_l (Axis (a)) == this) + as[j++] = Axis (a); + if (j == 1) + as[j++] = as[0]; + + axeses.push (as); + } + +. * patch: don't touch timestamp if all patches fail. +. * MetaPost: should not generate setgray for unfill + +. * mf-to-table -> add space 'before ; in AFM output. (-> check AFM +spec. Is this a bug in afm2tfm?) . * check out GCC signatures? . * glibc 2.0: f = fopen ("/dev/null", "r") assert (feof (f)) -.* 3RD PARTY PROJECTS: -. * make GCC warn about ctor that leaves member vars uninitialised. -. * GNU patch -. * 'double-fix' mode: ignore identical fix, rather than suggest - to revert patch direction when (more or less? exactly) the same - thing is fixed +. * tetex: mfplain.mem -> INSTALL +. * mfplain.ini not in tetex 0.9 -> INSTALL + + .* PROJECTS . * Scripts: -. * fix position of bar number . * stack scripts in chords: % fingering: footing: < a-4 c-2 g-1 > < c-\ltoe e-\lheel > @@ -330,7 +339,6 @@ touching it. . * stack parameterised scripts for fingering and footing: . * convert-mudela: -. * automatically add a \version if not present. . * better parsing . * make smarter . * convert-mudela -e empty.ly @@ -344,34 +352,40 @@ touching it. . * use properties for: . * default tempo. -. * cadenza mode? . * page handling: . * PS output . * optimal pagebreaking. -. * Unicode support? -> man 7 unicode -. * 16 bit Strings -. * -u switch -. * detect of 16/8 bit files -. * examples to go with it. - -. * Spring_spacer: -. * write a faster Spring_spacer (without matrices if possible) -. * relate energybound to linelen unitspace fontsize etc. -. * used fixed point fp? +. * internationalisation for input. +. * Unicode support? -> man 7 unicode +. * (The explanation below is mostly intended for Han-Wen and Jan) +> Before, the font was changed with macros declared separately for +> pure TeX and LaTeX, but now all the fonts are declared directly in +> the generated code using the low-level TeX commands. This circumvents +> the fontencoding mechanism of LaTeX and is a potential source of +> problems also for us users of the Latin-1 character set. +> I think it still works since the inputencoding latin1 is +> declared by ly2dvi, but it still means that e.g. an o with +> umlaut is typeset as a combination of the two symbols 'o' and +> 'umlaut' instead of as a single character, as would be the case +> if fontencoding OT1 had been used. This shouldn't give any +> difference in layout, though. One of the main argument for using +> fontencoding OT1 is for the hyphenation mechanism to work, an +> argument that's clearly irrelevant in our application. Yet we +> see the problem for August. . * \header . * output header info to MIDI too. +. * dump \header into easily parsable format. . * a musical dictionary. See Documentation/vocabulary-*, other - languages: +languages: . * explanations . * italian . * german . * dutch . * swedish - .. ? . * chords . * guitar chords (fret diagrams) @@ -382,53 +396,22 @@ touching it. . * Debug logs: . * derive lily_stream, Dstream, texstream from ostream? . * indentable stream as baseclass for TeX stream, lily stream, Dstream. -. * use dstream feature in mi2mu +. * use dstream feature in midi2ly . * integrate IO checking into stream class . * input converters . * NIFF? -. * ABC? -. * SMDL? +. * musedata . * add to MIDI output: -. * tempo change +. * sharp / flat on trills (in MIDI ??) . * ornaments (and trills?) -. * repeat/volta . * slurs . * accents . * dynamics - > Would it be hard to add support for proper dynamics in MIDI output? I > would really like to have this feature... -To answer this, I have to give a little background. Please say so if -I am being obtuse. - -Both audio and notation elements are created decentrally, when -LilyPond says "Interpreting music ... [8][16] etc." After all -elements are created, they are processed again to calculate all -parameters. After that is done, they are dumped onto the output (the -MIDI stream or the TeX file). - -The audio and notation elements are created by objects called -performer and engraver respectively. They work by taking a chunk of -input (a so-called request), and using the request to create an audio -or notation element. - -After some processing, the engraver sends the created elements to -its enclosing notation/performance context. - -In the case of notation, engravers can also modify existing elements -created by sibling engravers. Eg. the beam-engraver will modify stems -when it creates a beam over a couple of stems. This is done in -Engraver::do_acknowledge_element () and -Engraver::do_process_acknowledged (). - -In the case of audio, there are no mechanisms to modify existing audio -elements. After the audio elements are created, they are sent directly -to the enclosing context (an instance of Performer_group_performer), -through the method Performer::play () - Concretely spoken, for dynamics you have to write a performer (Dynamics_performer), that will take the input requests. If I understand correctly, every MIDI note played must have its dynamic @@ -439,18 +422,11 @@ with a broadcast/acknowledge process. So the best way of handling this, is -- supporting dynamic settings in Audio_note - -- mimicking the broadcast/acknowledge mechanism of the Engravers in - the Performers + 1 supporting dynamic settings in Audio_note -- using that mechanism to write a Dynamics_performer that will modify + 2 Write a Dynamics_performer that will modify any notes it finds to set appropriate strengths. -You could also kludge this by deriving from Performer_group_performer -a performer that also sets dynamics within notes, but that is not the -elegant way to do it. - I'd say that the work involved is not hard, but you have to be fluent with C++ and need some insight into the working of Notation Contexts and friends. I guess I could do it in a day or so, but if you are not @@ -462,65 +438,29 @@ valuable, and I think I have more interesting things to do than fixing the MIDI output (I don't even have a soundcard). But I *do* want to help you or other people with implementing this, so if you need help, don't hesitate to ask. - . * account for rhythmic position in measure . * etc. -. * grace notes -. * make separate class for Grace_*_engravers - (which is at Voice_gravs level) -. * make encapsulated spacing problems. - -. * accidentals per Voice_group -. * Output class, handles : (smallish) -. * help text /(c) notice? -. * version line -. * warning /errors/progress -. * abort on error/warning; exit status -. * quiet/ignore-version options -. * logfile output +. * logfile output? . * PS . * speed up PS code. . * PS lines to .eps files . * write custom prolog - -. * NIFF ? -. * Common Music Notation -. * PostScript output (esp. Beams, Slurs, etc) -. * Move all Score_elems, into libmutype.a -. * SGML - -. * Documentation -. * Doc (C) stuff of sheet music -. * a better format? SGML? TeX? Info? -. * a better tutorial +. * fix ps font switching . * more spanners (smallish) . * Glissando . * trill -. * Rewrite Stem, Beam and Rhythmic_grouping (hairy) -. * [c8. c32 c32] -. * doc on Rhythmic_grouping -. * general shaving on Beam and Stem -. * use plet grouping -. * separate visual from rhythmic info even more -. * beams over bars - -. * lines: -. * Ledger lines, should be separate item: Ledger_lines -. * set different line sizes / thicknesses -. * beam stem showthrough, inter beam sizes (french vs german style) - . * Collisions . * left/right note balls should be handled by Collision: < \multi 2; { \stem 1; } { } > . * Keys: . * merge key{item} & localkey{item}? -. * spacing, national styles? +. * spacing . * Support for TAB . * redo Notehead to allow digits as heads @@ -529,64 +469,33 @@ hesitate to ask. . * should adjust stemlength for flag number. . * breaking: -. * caching breakpoints -. * saving them . * specify number of lines .* INPUTLANGUAGE +. * convention for slurs vs. phrasing marks. . * Language: -. * \type -> \context ? . * \translator -> ? . * fix \partial . * \bla {} vs \bla ; -. * mix engraver hacking with music ? . * \once\property KEY = VAL -. * \addtranslator, \removetranslator -. * junk ^ and _ for scripts -. * junk _ for lyrics. -. * abstract grammar. +. * input property . * Figure out semicolons. -. * c4 4 4 4 for c4 c4 c4 c4? . * 4 ? -. * Viola mode? - - @c c g e g - for - c g es g, - - @A c g e g - for - cis gis e gis . * configure pitch_byte . * rest name configurable .* SMALLISH PROJECTS -. * fix confusing naming in Engraver vs Engraver_group_engraver (context) - -. * progress when creating MIDI elts. - -. * A range for context errors (eg. mark both { and }. ) - . * lyric in staff (sharpsharp in staff, text below) -. * half sharps/flats - . * write Dynamic_line (to group dynamics horizontally) -. * use Real for all y positions. - -. * half-sharps, half-flats - -. * adaptive accidental spacing. . * handle EOF graciously in error messages. . * midi esp.: use I32 iso int where 32 bits are needed (or assumed...) -. * stafftypes: voice names/ instrument names. - . * lily \tempo . * % toe to bheel four to five @@ -601,120 +510,10 @@ hesitate to ask. . * Text_crescendo -. * revise calcideal - .* IDEAS . * Output data structures of Mudela in XML/SGML. . * create libmudela, or liblily_frontend . * move MIDI stuff (including Quantization) to a ANSI C libmidi library. -. * Spacing_request for manually adjusting spacing -. * caching breakpoints -. * used fixedpoint arithmetic for min. energy. -. * move towards incremental algorithms. -. * versioning stuff (cvt mudela, mudela, etc.) -. * dynamic loading of engravers? -.* SMOBS -Han-Wen Nienhuys writes: - -> class Foo_class { -> Foo_smob *smob_ptr_; -> } -> -> struct Foo_smob { -> Foo_class *class_ptr_ -> } - -Usually you can get away without having this interlinked structure. -One piece of information you need when exporting objects to scheme is -the smob tag for your class. You might store this value (a long) into -a class static variable, or a file static variable. I'll use a class -static variable in this example. - -I typically use code that works like this (untested code ahead): - -class Foo_class { - static long *Foo_smob_tag; - SCM obj; // representation as a scheme object, description comes later -} - -// call this once on startup -void init_Foo_class { - static scm_smobfuns type_rec; - - type_rec.mark = foo_mark; - type_rec.free = foo_free; - type_rec.print = foo_display; - type_rec.equalp = 0; - Foo_class::Foo_smob_tag = new int(scm_new_smob(type_rec)); -} - -When you want to export an object to scheme, you put a pointer to the -object itself in the cdr of the cell, and the tag in the car of the -cell. The code looks like this: - -// Is this a Foo? -static int -foo_p(SCM obj) -{ - return(SCM_NIMP(obj) && SCM_CAR(obj) == Foo_class::Foo_smob_tag); -} - -// given a Scheme representation, return, a C++ representation -static Foo_class * -foo_unbox(SCM obj) -{ - return((Foo_class*)SCM_CDR(obj)); -} - -// the SCM representation of the object is stored inside itself -// this will become useful when destructor gets called -static SCM -foo_box(Foo_class *foo) -{ - SCM_DEFER_INTS; - SCM_NEWCELL(foo->obj); - SCM_SETCAR(foo->obj, Foo_class::Foo_smob_tag); - SCM_SETCDR(foo->obj, (SCM)foo); - SCM_ALLOW_INTS; - return foo->obj; -} - -> C++ determines life time, so what is the strategy? - -What happens now when the destructor gets called? Lets set the cdr to -NULL, and then check for that in all of the primitive functions that -use your smob. We'll call this notion 'live'; a scheme object is -'live' if the C++ representation still exists, it's dead if the C++ -object is gone. You can still have references to dead objects in -scheme code; it's just an error to use them. This idea is stolen from -Emacs's handling of buffers ('buffer-live-p' and friends). - -Add another function, foo_live_p: - -static int -foo_live_p(SCM obj) -{ - return(foo_p(obj) && SCM_CDR(obj) != NULL); -} - -In you destructor, you need to do: - -~Foo_class() -{ - SCM_CDR(this->obj, NULL); -} - -When writing new primitives, now just check foo_live_p(). - -I hope the above helps, - --russ - - --- -"Even if you are on the right track, you'll get run over -if you just sit there." - --Will Rogers (1879-1935) * OUTLINE SETUP .* .EMACS @@ -746,3 +545,5 @@ if you just sit there." (require 'allout) (outline-init 't) + +