From be9b6e3bc8622af69350918f3e1d4f90b333d0bb Mon Sep 17 00:00:00 2001 From: Martin Peach Date: Thu, 24 Aug 2006 06:56:27 +0000 Subject: Source for midifile.pd with help patch svn path=/trunk/externals/mrpeach/; revision=5727 --- midifile/midifile-help.pd | 173 ++++++ midifile/midifile.c | 1444 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1617 insertions(+) create mode 100755 midifile/midifile-help.pd create mode 100755 midifile/midifile.c diff --git a/midifile/midifile-help.pd b/midifile/midifile-help.pd new file mode 100755 index 0000000..e3f882f --- /dev/null +++ b/midifile/midifile-help.pd @@ -0,0 +1,173 @@ +#N canvas 364 491 466 316 12; +#N canvas 0 0 690 635 midifile_write 0; +#X obj 15 2 bng 45 250 50 0 empty empty choose 5 23 0 8 -62784 -260818 +-258699; +#X text 450 563 Martin Peach \, 2005; +#X obj 130 77 tgl 45 0 empty empty record 2 23 0 8 -258699 -241291 +-24198 0 1; +#X floatatom 125 585 15 0 0 0 tick - -; +#X obj 130 206 metro 2; +#X floatatom 181 149 15 0 0 0 - - -; +#X msg 181 123 2.005; +#X msg 267 433 flush; +#X obj 275 304 makenote; +#X obj 275 334 pack f f; +#X msg 251 237 60; +#X msg 304 237 127; +#X msg 358 237 100; +#X floatatom 251 263 5 0 0 0 - - -; +#X floatatom 304 263 5 0 0 0 - - -; +#X floatatom 358 263 5 0 0 0 - - -; +#X obj 275 364 list prepend 144; +#X obj 398 325 + 144; +#X floatatom 398 301 5 0 0 0 - - -; +#X text 447 301 channel; +#X text 448 323 note-on; +#X msg 17 482 verbose \$1; +#X text 5 437 verbosity defaults to 1; +#X text 76 14 1: open a file for writing; +#X text 199 89 2: start recording; +#X text 439 239 3: input MIDI as lists; +#X text 317 434 4: stop recording and save the file; +#X obj 131 525 midifile; +#X obj 15 358 savepanel; +#X msg 185 388 240 1 2 3 4 247; +#X text 320 388 a sysex message; +#X obj 125 555 float; +#X msg 15 389 write \$1; +#X floatatom 17 456 5 0 0 0 - - -; +#X connect 0 0 28 0; +#X connect 2 0 4 0; +#X connect 4 0 27 0; +#X connect 5 0 4 1; +#X connect 6 0 5 0; +#X connect 7 0 27 0; +#X connect 8 0 9 0; +#X connect 8 1 9 1; +#X connect 9 0 16 0; +#X connect 10 0 13 0; +#X connect 11 0 14 0; +#X connect 12 0 15 0; +#X connect 13 0 8 0; +#X connect 14 0 8 1; +#X connect 15 0 8 2; +#X connect 16 0 27 0; +#X connect 17 0 16 1; +#X connect 18 0 17 0; +#X connect 21 0 27 0; +#X connect 27 1 31 1; +#X connect 27 2 31 0; +#X connect 28 0 32 0; +#X connect 29 0 27 0; +#X connect 31 0 3 0; +#X connect 32 0 27 0; +#X connect 33 0 21 0; +#X restore 76 116 pd midifile_write; +#N canvas 388 25 825 783 midifile_read 0; +#X obj 102 332 midifile wowo; +#X obj 102 285 bng 15 250 50 0 empty empty step 20 10 0 8 -262144 -1 +-1; +#X obj 29 201 openpanel; +#X obj 29 0 bng 45 250 50 0 empty empty choose 5 23 0 8 -62784 -260818 +-258699; +#X text 525 724 Martin Peach \, 2005; +#X obj 166 36 tgl 45 0 empty empty play 10 23 0 8 -24198 -1 -258699 +0 1; +#X msg 308 279 rewind; +#X text 363 278 go to start of file; +#X floatatom 151 370 15 0 0 0 tick - -; +#X obj 367 176 hradio 15 1 0 16 empty empty track_number 0 -6 0 8 -62784 +-241291 -1 0; +#X msg 367 197 dump \$1; +#X msg 308 253 68050; +#X msg 234 129 track \$1; +#X obj 234 80 hradio 15 1 0 16 empty empty track_number 0 -6 0 8 -62784 +-241291 -1 0; +#X obj 166 263 metro 2; +#X msg 241 102 -1; +#X text 272 101 output all tracks; +#X text 212 332 creation arguments: midi_file_name; +#X text 305 129 output only this track; +#X text 430 196 parse this track to main window; +#X msg 519 279 0; +#X floatatom 217 206 15 0 0 0 - - -; +#X msg 217 180 2.005; +#X text 351 252 goto tick 68050; +#X floatatom 66 575 5 0 0 0 note - -; +#X floatatom 121 606 5 0 0 1 velocity - -; +#X obj 31 550 bng 15 250 50 0 empty empty empty 0 -6 0 8 -262144 -1 +-1; +#X obj 201 403 t b b b; +#X obj 205 470 float; +#X floatatom 205 492 15 0 0 0 last_tick - -; +#X text 207 352 bangs at end of file; +#X obj 31 423 list split 1; +#X obj 76 545 list split 1; +#X obj 121 627 / 127; +#X floatatom 121 651 5 0 0 0 - - -; +#X obj 86 695 send note_amp; +#X obj 31 719 send midi_pitch; +#X obj 86 672 float; +#X obj 31 630 float; +#X msg 105 398 144; +#X floatatom 106 454 5 0 0 0 - - -; +#X obj 31 478 select 144; +#X msg 576 291 verbose \$1; +#X text 576 247 verbosity defaults to 1; +#X text 91 12 1: choose a MIDI file to play; +#X text 228 43 2: start playing it; +#X obj 297 411 print ****; +#X obj 103 108 spigot; +#X obj 146 82 tgl 15 0 empty empty empty 0 -6 0 8 -44926 -258699 -258699 +0 1; +#X text 95 79 loop; +#X msg 29 239 read \$1; +#X floatatom 576 265 5 0 0 0 - - -; +#X connect 0 0 31 0; +#X connect 0 1 8 0; +#X connect 0 2 27 0; +#X connect 0 2 46 0; +#X connect 1 0 0 0; +#X connect 2 0 50 0; +#X connect 3 0 2 0; +#X connect 5 0 14 0; +#X connect 6 0 0 0; +#X connect 8 0 28 1; +#X connect 9 0 10 0; +#X connect 10 0 0 0; +#X connect 11 0 0 0; +#X connect 12 0 0 0; +#X connect 13 0 12 0; +#X connect 14 0 0 0; +#X connect 15 0 12 0; +#X connect 20 0 0 0; +#X connect 21 0 14 1; +#X connect 22 0 21 0; +#X connect 24 0 38 1; +#X connect 25 0 33 0; +#X connect 26 0 38 0; +#X connect 26 0 37 0; +#X connect 27 0 47 0; +#X connect 27 1 6 0; +#X connect 27 2 5 0; +#X connect 27 2 28 0; +#X connect 28 0 29 0; +#X connect 31 0 41 0; +#X connect 31 1 32 0; +#X connect 32 0 24 0; +#X connect 32 1 25 0; +#X connect 33 0 34 0; +#X connect 34 0 37 1; +#X connect 37 0 35 0; +#X connect 38 0 36 0; +#X connect 39 0 40 0; +#X connect 40 0 41 1; +#X connect 41 0 26 0; +#X connect 42 0 0 0; +#X connect 47 0 5 0; +#X connect 48 0 47 1; +#X connect 50 0 0 0; +#X connect 51 0 42 0; +#X restore 76 83 pd midifile_read; +#X text 228 234 2006 Martin Peach; +#X text 15 10 midifile reads and writes MIDI files.; diff --git a/midifile/midifile.c b/midifile/midifile.c new file mode 100755 index 0000000..92482aa --- /dev/null +++ b/midifile/midifile.c @@ -0,0 +1,1444 @@ +/* midifile.c v 1.2: An external for Pure Data that reads and writes MIDI files +* Copyright (C) 2005 Martin Peach +* +* 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 +* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +* +* Latest version of this file can be found at: +* http://puredata.info/Members/martinrp +* +* To compile for MSWindows machines, make sure that the line +* #define MSW is not commented out, or add /D "MSW" in the command line +* ...otherwise make sure it is commented out. +* martinrp@vax2.concordia.ca +* 20051202 changed help file name to the new way: midifile-help +* 20060103 implement writing type 0 file. (Need to add running status) +* 20060104 running status +* 20060105 sysex write, add verbose for more messages to console, bang output only once at end of file +* 20060109 don't forget to rewind tracks before a write! +* ...Cleaned up naming so that all function names begin with midifile +* verbosity can be 0-3 +* 20060110 output totaltime before end-bang +*/ + +//#define MSW // useful in m_pd.h if not yet replaced by _MSC_VER + +#include "m_pd.h" +#include +#include + +#ifdef _MSC_VER +#define EXPORT_SHARED __declspec(dllexport) +#else +#define EXPORT_SHARED +#endif +#define NO_MORE_ELEMENTS 0xFFFFFFFF + +static t_class *midifile_class; + +#define PATH_BUF_SIZE 256 +#define MAX_TRACKS 128 // track data is allocated as needed but we need to preallocate space for the pointers +#define MAX_TRACK_LEN 1024 // for now... +#define ALL_TRACKS MAX_TRACKS +typedef enum {mfReset, mfReading, mfWriting} mfstate; + +typedef struct mf_header_chunk +{ + char chunk_type[4]; // each chunk begins with a 4-character ASCII type. + size_t chunk_length ; // followed by a 32-bit length + int chunk_format; + int chunk_ntrks; + int chunk_division; +} mf_header_chunk; + +typedef struct mf_track_chunk +{ + char chunk_type[4]; // each chunk begins with a 4-character ASCII type. + size_t chunk_length ; // followed by a 32-bit length + size_t delta_time ; // current delta_time of latest track_data element + size_t total_time ; // sum of delta_times so far + size_t track_index ; // current byte offset to next track_data element + unsigned char running_status; + char *track_data; +} mf_track_chunk; + +typedef struct t_midifile +{ + t_object x_obj; + size_t total_time; // current time for this MIDI file in delta_time units + t_atom midi_data[3]; // one MIDI packet as a list + t_outlet *midi_list_outlet; + t_outlet *bang_outlet; + //t_outlet *sysex_outlet; // 20060105 use midi_list_outlet instead + t_outlet *total_time_outlet; + FILE *fP; + FILE *tmpFP; + char fPath[PATH_BUF_SIZE]; + size_t offset; // character offset into the file fP + int track; // play this track, or all tracks if negative; + int verbosity; // nonzero for text output to console + int ended; // nonzero if all tracks have finished + mfstate state; // READING or WRITING + mf_header_chunk header_chunk; // First chunk in the midi file + mf_track_chunk track_chunk[MAX_TRACKS]; // Subsequent track chunks. Other kinds of chunk are ignored +} t_midifile; + +void midifile_skip_next_track_chunk_data(t_midifile *x, int index); +void midifile_get_next_track_chunk_data(t_midifile *x, int index); +size_t midifile_get_next_track_chunk_delta_time(t_midifile *x, int index); +void midifile_output_long_list (t_outlet *outlet, unsigned char *cP, size_t len, unsigned char first_byte); +void midifile_dump_track_chunk_data(t_midifile *x, int index); +char *midifile_read_var_len (char *cP, size_t *delta); +int midifile_write_variable_length_value (FILE *fP, size_t value); +unsigned short midifile_combine_bytes(unsigned char data1, unsigned char data2); +unsigned short midifile_get_multibyte_2(char*n); +unsigned long midifile_get_multibyte_3(char*n); +unsigned long midifile_get_multibyte_4(char*n); +int midifile_read_track_chunk(t_midifile *x, int index); +int midifile_read_header_chunk(t_midifile *x); +void midifile_rewind (t_midifile *x); +void midifile_rewind_tracks(t_midifile *x); +int midifle_read_chunks(t_midifile *x); +void midifile_close(t_midifile *x); +void midifile_free_file(t_midifile *x); +void midifile_free(t_midifile *x); +int midifile_open_path(t_midifile *x, char *path, char *mode); +void midifile_flush(t_midifile *x); +size_t midifile_write_header(t_midifile *x); +void midifile_read(t_midifile *x, t_symbol *path); +void midifile_write(t_midifile *x, t_symbol *path); +void midifile_bang(t_midifile *x); +size_t midifile_write_end_of_track(t_midifile *x, size_t end_time); +void midifile_float(t_midifile *x, t_float ticks); +void midifile_list(t_midifile *x, t_symbol *s, int argc, t_atom *argv); +void *midifile_new(t_symbol *s, int argc, t_atom *argv); +void midifile_verbosity(t_midifile *x, t_floatarg verbosity); +void midifile_single_track(t_midifile *x, t_floatarg track); +void midifile_dump(t_midifile *x, t_floatarg track); +EXPORT_SHARED void midifile_setup(void); + +EXPORT_SHARED void midifile_setup(void) +{ + midifile_class = class_new (gensym("midifile"), + (t_newmethod) midifile_new, + (t_method)midifile_free, sizeof(t_midifile), + CLASS_DEFAULT, + A_GIMME, 0); + //CLASS_DEFAULT a normal object with one inlet + class_addbang(midifile_class, midifile_bang); + class_addfloat(midifile_class, midifile_float); + class_addlist(midifile_class, midifile_list); + class_addmethod(midifile_class, (t_method)midifile_read, gensym("read"), A_DEFSYMBOL, 0); + class_addmethod(midifile_class, (t_method)midifile_flush, gensym("flush"), 0); + class_addmethod(midifile_class, (t_method)midifile_write, gensym("write"), A_DEFSYMBOL, 0); + class_addmethod(midifile_class, (t_method)midifile_dump, gensym("dump"), A_DEFFLOAT, 0); + class_addmethod(midifile_class, (t_method)midifile_single_track, gensym("track"), A_DEFFLOAT, 0); + class_addmethod(midifile_class, (t_method)midifile_rewind, gensym("rewind"), 0); + class_addmethod(midifile_class, (t_method)midifile_verbosity, gensym("verbose"), A_DEFFLOAT, 0); + class_sethelpsymbol(midifile_class, gensym("midifile-help")); +} + +void *midifile_new(t_symbol *s, int argc, t_atom *argv) +{ + t_midifile *x = (t_midifile *)pd_new(midifile_class); + t_symbol *pathSymbol; + int i; + + if (x == NULL) + { + error("midifile: Could not create..."); + return x; + } + x->fP = NULL; + x->fPath[0] = '\0'; + x->track = ALL_TRACKS; // startup playing anything + x->midi_data[0].a_type = x->midi_data[1].a_type = x->midi_data[2].a_type = A_FLOAT; + x->state = mfReset; + x->verbosity = 1; // default to posting all + for (i = 0; i < MAX_TRACKS; ++i) + { + x->track_chunk[i].track_data = NULL; + } + // find the first string in the arg list and interpret it as a path to a midi file + for (i = 0; i < argc; ++i) + { + if (argv[i].a_type == A_SYMBOL) + { + pathSymbol = atom_getsymbol(&argv[i]); + if (pathSymbol != NULL) + { + if (midifile_open_path(x, pathSymbol->s_name, "rb")) + { + if (x->verbosity) post("midifile: opened %s", x->fPath); + x->state = mfReading; + if (midifle_read_chunks(x) == 0) midifile_free_file(x); + } + else error("midifile: unable to open %s", pathSymbol->s_name); + break; + } + } + } + x->midi_list_outlet = outlet_new(&x->x_obj, &s_list); + // x->sysex_outlet = outlet_new(&x->x_obj, &s_float); // raw sysex stream (20060105 send a list through midi_list_outlet) + x->total_time_outlet = outlet_new(&x->x_obj, &s_float); // current total_time + x->bang_outlet = outlet_new(&x->x_obj, &s_bang); // bang at end of file + return (void *)x; +} + +void midifile_close(t_midifile *x) +{ + if (x->fP != NULL) + { + fclose (x->fP); + x->fP = NULL; + } + if (x->tmpFP != NULL) + { + fclose(x->tmpFP); + x->tmpFP = NULL; + } + x->fPath[0] = '\0'; + x->state = mfReset; + x->total_time = 0L; + x->offset = 0L; + outlet_float(x->total_time_outlet, x->total_time); +} + +void midifile_free_file(t_midifile *x) +{ + int i; + + midifile_close(x); + + for (i = 0; i < MAX_TRACKS; ++i) + { + if (x->track_chunk[i].track_data != NULL) + { + freebytes(x->track_chunk[i].track_data, x->track_chunk[i].chunk_length); + //if (x->verbosity) post("midifile_free: freed %lu bytes for track %d", x->track_chunk[i].chunk_length, i); + } + x->track_chunk[i].track_data = NULL; + } +} + +void midifile_free(t_midifile *x) +{ + midifile_free_file(x); +} + +int midifile_open_path(t_midifile *x, char *path, char *mode) +/* path is a string. Up to PATH_BUF_SIZE-1 characters will be copied into x->fPath. */ +/* mode should be "rb" or "wb" */ +/* x->fPath will be used as a file name to open. */ +/* midifile_open_path attempts to open the file for binary mode reading. */ +/* Returns 1 if successful, else 0. */ +{ + FILE *fP; + char tryPath[PATH_BUF_SIZE]; + + strncpy(tryPath, path, PATH_BUF_SIZE-1); // copy path into a length-limited buffer + // ...if it doesn't work we won't mess up x->fPath + tryPath[PATH_BUF_SIZE-1] = '\0'; // just make sure there is a null termination + + fP = fopen(tryPath, mode); + if (fP == NULL) return 0; + x->fP = fP; + strncpy(x->fPath, tryPath, PATH_BUF_SIZE); + return 1; +} + +void midifile_flush(t_midifile *x) +/* write the header to x->fP, copy x->tmpFP into it, and close both files */ +/* flush ends the track */ +{ + size_t written = 0L; + size_t end_time = x->total_time; + int c; + + if(x->state != mfWriting) return; // only if we're writing + + outlet_bang(x->bang_outlet); // bang so tick count can be saved externally + midifile_write_end_of_track(x, end_time); + written = midifile_write_header(x); +/* now copy the MIDI data from tmpFP to fP */ + rewind (x->tmpFP); + while ((c = getc(x->tmpFP)) != EOF) + { + putc(c, x->fP); + ++written; + } + if (x->verbosity) post ("midifile: wrote %lu to %s", written, x->fPath); + midifile_close(x); +} + +size_t midifile_write_header(t_midifile *x) +/* write the MThd and MTrk headers to x->fP */ +{ + size_t j, written = 0L; + int i; + char c; + + rewind (x->fP); + fprintf (x->fP, "MThd"); + j = 6; // length of header data + for (i = 0; i < 4; ++i) + { // msb first + c = (char)((j & 0xFF000000)>>24); + putc(c, x->fP); + j <<= 8; + } + j = 0; // type of file + for (i = 0; i < 2; ++i) + { // msb first + c = (char)((j & 0xFF00)>>8); + putc(c, x->fP); + j <<= 8; + } + j = 1; // number of tracks + for (i = 0; i < 2; ++i) + { // msb first + c = (char)((j & 0xFF00)>>8); + putc(c, x->fP); + j <<= 8; + } + j = x->header_chunk.chunk_division; // ticks per quarter note + for (i = 0; i < 2; ++i) + { // msb first + c = (char)((j & 0xFF00)>>8); + putc(c, x->fP); + j <<= 8; + } + fprintf (x->fP, "MTrk"); + j = x->track_chunk[0].chunk_length; // length of MIDI data +// if (x->verbosity) post ("chunk_length is %lu", j); + for (i = 0; i < 4; ++i) + { // msb first + c = (char)((j & 0xFF000000)>>24); + putc(c, x->fP); +// if (x->verbosity) post ("...%d...", c); + j <<= 8; + } + written = 22L; + return written; +} + +void midifile_write(t_midifile *x, t_symbol *path) +/* open the file for writing and write the header */ +{ + midifile_free_file(x); + if (midifile_open_path(x, path->s_name, "wb")) + { + if (x->verbosity) post("midifile: opened %s", x->fPath); + x->state = mfWriting; + x->tmpFP = tmpfile (); // a temporary file for the MIDI data while we don't know how long it is + + strncpy (x->header_chunk.chunk_type, "MThd", 4L);// track header chunk + x->header_chunk.chunk_length = 6L; // 3 ints to follow + x->header_chunk.chunk_format = 0; // single-track file + x->header_chunk.chunk_ntrks = 1; // one track for type 0 file + x->header_chunk.chunk_division = 0; // for now + strncpy (x->track_chunk[0].chunk_type, "MTrk", 4L); + x->track_chunk[0].chunk_length = 0L; // for now + midifile_rewind_tracks(x); + } + else error("midifile: Unable to open %s", path->s_name); +} + +void midifile_read(t_midifile *x, t_symbol *path) +{ + midifile_free_file(x); + if (midifile_open_path(x, path->s_name, "rb")) + { + if (x->verbosity) post("midifile: opened %s", x->fPath); + x->state = mfReading; + if (midifle_read_chunks(x) == 0) midifile_free_file(x); + } + else error("midifile: Unable to open %s", path->s_name); +} + +void midifile_bang(t_midifile *x) +/* step forward one tick and process all tracks for that tick */ +{ + int j, result = 1, ended = 0; + size_t total_time; + + switch (x->state) + { + case mfReading: + if (x->verbosity > 2) post("midifile_bang: total_time %lu", x->total_time); + for (j = 0; ((j < x->header_chunk.chunk_ntrks)&&(result != 0)); ++j) + { + if (x->track_chunk[j].total_time != NO_MORE_ELEMENTS) + { + while ((total_time = midifile_get_next_track_chunk_delta_time(x, j) + x->track_chunk[j].total_time) == x->total_time) + { + if ((x->track == j) ||(x->track == ALL_TRACKS)) midifile_get_next_track_chunk_data(x, j); + else midifile_skip_next_track_chunk_data(x, j); + } + x->ended = 0; + } + if (x->track_chunk[j].delta_time == NO_MORE_ELEMENTS) ++ended; + } + if ((ended == x->header_chunk.chunk_ntrks)&&(x->ended == 0)) + { // set ended flag, only bang once + if (x->verbosity > 1) post ("ended = %d x->header_chunk.chunk_ntrks = %d", ended, x->header_chunk.chunk_ntrks); + outlet_bang(x->bang_outlet); + ++x->ended; + } + // fall through into mfWriting + case mfWriting: + ++x->total_time; + outlet_float(x->total_time_outlet, x->total_time); + break; + default: + break;// don't change time when no files are open + } +} + +/* The arguments of the ``list''-method +* a pointer to the class-dataspace +* a pointer to the selector-symbol (always &s_list) +* the number of atoms and a pointer to the list of atoms: +*/ + +void midifile_list(t_midifile *x, t_symbol *s, int argc, t_atom *argv) +/* add a list containing time and midi packet to the temporary file in MIDI file format */ +{ + int i, j, k, m, dt_written = 0; + size_t len, written = 0L; + static int warnings = 0; + + if (! x->state == mfWriting) return;// list only works for writing + if (x->tmpFP == NULL) + { + if (0 == warnings++) error ("midifile: no file is open for writing"); + return; + } + for (i = 0; i < argc; ++i) + { + switch (argv[i].a_type) + { + case A_FLOAT: + { + j = atom_getint(&argv[i]); + if (x->verbosity > 2) post ("midifile_list. j[%d] = 0x%lX", i, j); + if (j <= 0x100) + { + if (!dt_written) + { // deltatime + x->track_chunk[0].delta_time = x->total_time - x->track_chunk[0].total_time; + x->track_chunk[0].total_time = x->total_time; + written = midifile_write_variable_length_value(x->tmpFP, x->track_chunk[0].delta_time); + dt_written = 1; + } + if (j == x->track_chunk[0].running_status) break;// don't save redundant status byte + if (j >= 0x80 && j <= 0xEF)x->track_chunk[0].running_status = j;// new running status + else if (j >= 0xF0 && j <= 0xF7) + { + x->track_chunk[0].running_status = 0;// clear running status + if (j == 0xF0) + { // system exclusive: + // find length + for (k = i+1, len = 0L; k < argc; ++k, ++len) + { + if (argv[k].a_type != A_FLOAT) + { + error ("midifile: sysex list must be all floats"); + x->track_chunk[0].chunk_length += written; + return; + } + m = atom_getint(&argv[k]); + if (m & 0x80) break;// take any non-data as end of exclusive + } + if (m != 0xF7) + { + error ("midifile: sysex list terminator is 0x%d", m); + x->track_chunk[0].chunk_length += written; + return; + } + ++len; + if (x->verbosity) post ("midifile: sysex length %lu. j = 0x%X", len, j); + putc (j, x->tmpFP); + ++written; + // write length as variable length + written += midifile_write_variable_length_value (x->tmpFP, len); + // write the rest of the sysex message + for (k = i+1; j != 0xF7; ++k) + { + j = atom_getint(&argv[k]); + putc (j, x->tmpFP); + ++written; + } + x->track_chunk[0].chunk_length += written; + return; + } + } + if (x->verbosity > 1) post ("midifile: j = 0x%X", j); + putc (j, x->tmpFP); + ++written; + } + break; + } + } + } + x->track_chunk[0].chunk_length += written; +// if (x->verbosity) post ("midifile_list"); +} + +size_t midifile_write_end_of_track(t_midifile *x, size_t end_time) +/* write End of Track event to x->tmpFP */ +{ + size_t written = 0L; + + x->track_chunk[0].delta_time = end_time - x->track_chunk[0].total_time; + x->track_chunk[0].total_time = x->total_time; + written = midifile_write_variable_length_value (x->tmpFP, x->track_chunk[0].delta_time); + putc (0xFF, x->tmpFP); + putc (0x2F, x->tmpFP); + putc (0x00, x->tmpFP); + written += 3L; + x->track_chunk[0].chunk_length += written; + return written; +} + +void midifile_float(t_midifile *x, t_float ticks) +/* go to a total time of cue_time */ +{ + size_t cTime = (size_t)ticks; + size_t total_time; + int j, result = 1, ended = 0; + + switch (x->state) + { + case mfReading: // cue to ticks + //if (x->verbosity) post ("midifile_float %d", cTime); + midifile_rewind_tracks(x); + for (j = 0; ((j < x->header_chunk.chunk_ntrks)&&(result != 0)); ++j) + { + if (x->track_chunk[j].total_time != NO_MORE_ELEMENTS) + { + while ((total_time = midifile_get_next_track_chunk_delta_time(x, j) + x->track_chunk[j].total_time) < cTime) + { + midifile_skip_next_track_chunk_data(x, j); + } + } + if (x->track_chunk[j].delta_time == NO_MORE_ELEMENTS) ++ended; + } + x->total_time = cTime; + outlet_float(x->total_time_outlet, x->total_time); + if (ended == x->header_chunk.chunk_ntrks) + { + if (x->verbosity) post ("midifile: ended = %d x->header_chunk.chunk_ntrks = %d", ended, x->header_chunk.chunk_ntrks); + outlet_bang(x->bang_outlet); + } + break; + case mfWriting: // add ticks to current time + x->total_time += cTime; + outlet_float(x->total_time_outlet, x->total_time); + break; + case mfReset: // do nothing + break; + } + +} + +int midifle_read_chunks(t_midifile *x) +{ + int j, result; +// size_t delta_time; + + result = midifile_read_header_chunk(x); + midifile_rewind_tracks(x); + for (j = 0; ((j < x->header_chunk.chunk_ntrks)&&(result != 0)); ++j) + midifile_read_track_chunk(x, j); + return result; +} + +int midifile_read_header_chunk(t_midifile *x) +{ + char *cP = x->header_chunk.chunk_type; + char *sP; + char buf[4]; + size_t n; + int div, smpte, ticks; + + if (x->fP == NULL) + { + error("midifile: no open file"); + return 0;// no open file + } + rewind(x->fP); + x->offset = 0L; + n = fread(cP, 1L, 4L, x->fP); + x->offset += n; + if (n != 4L) + { + error("midifile: read %lu instead of 4", n); + return 0; + } + if (x->verbosity) post("midifile: Header chunk type: %c%c%c%c", cP[0], cP[1], cP[2], cP[3]); + if (!(cP[0] == 'M' && cP[1] == 'T' && cP[2] == 'h' && cP[3] == 'd')) + { + error ("midifile: bad file format: bad header chunk type"); + return 0; + } + cP = buf; + n = fread(cP, 1L, 4L, x->fP); + x->offset += n; + if (n != 4L) + { + error("midifile: read %lu instead of 4", n); + return 0; + } + x->header_chunk.chunk_length = midifile_get_multibyte_4(cP); + if (x->verbosity) post("midifile: Header chunk length: %lu", x->header_chunk.chunk_length); + if (x->header_chunk.chunk_length != 6L) + { + error ("midifile: bad file format: bad header chunk length"); + return 0; + } + n = fread(cP, 1L, 2L, x->fP); + x->offset += n; + if (n != 2L) + { + error("midifile: read %lu instead of 2", n); + return 0; + } + x->header_chunk.chunk_format = midifile_get_multibyte_2(cP); + switch (x->header_chunk.chunk_format) + { + case 0: + sP = "Single multichannel track"; + break; + case 1: + sP = "One or more simultaneous tracks"; + break; + case 2: + sP = "One or more sequentially independent single tracks"; + break; + default: + sP = "Unknown format"; + } + if (x->verbosity) post("midifile: Header chunk format: %d (%s)", x->header_chunk.chunk_format, sP); + + n = fread(cP, 1L, 2L, x->fP); + x->offset += n; + if (n != 2L) + { + error("midifile: read %lu instead of 2", n); + return 0; + } + x->header_chunk.chunk_ntrks = midifile_get_multibyte_2(cP); + if (x->verbosity) post("midifile: Header chunk ntrks: %d", x->header_chunk.chunk_ntrks); + if (x->header_chunk.chunk_ntrks > MAX_TRACKS) + { + error ("midifile: Header chunk ntrks (%d) exceeds midifile MAX_TRACKS, set to %d", x->header_chunk.chunk_ntrks, MAX_TRACKS); + x->header_chunk.chunk_ntrks = MAX_TRACKS; + } + + n = fread(cP, 1L, 2L, x->fP); + x->offset += n; + if (n != 2L) + { + error("midifile: read %lu instead of 2", n); + return 0; + } + x->header_chunk.chunk_division = midifile_get_multibyte_2(cP); + div = x->header_chunk.chunk_division; + if(div & 0x8000) + { + smpte = (-(div>>8)) & 0x0FF; + ticks = div & 0x0FF; + if (x->verbosity) post("midifile: Header chunk division: 0x%X: %d frames per second, %d ticks per frame", div, smpte, ticks); + } + else + { + if (x->verbosity) post("midifile: Header chunk division: 0x%X: %d ticks per quarter note", div, div); + } + return 1; +} + +int midifile_read_track_chunk(t_midifile *x, int index) +/* read the data part of a track chunk into track_data */ +/* after allocating the space for it */ +{ + char *cP = x->track_chunk[index].chunk_type; + char buf[4]; + char type[5]; + size_t n, len; + + if (x->fP == NULL) + { + error("midifile: no open file"); + return 0;// no open file + } + n = fread(cP, 1L, 4L, x->fP); + x->offset += n; + if (n != 4L) + { + error("midifile: read %lu instead of 4", n); + return 0; + } + if (!(cP[0] == 'M' && cP[1] == 'T' && cP[2] == 'r' && cP[3] == 'k')) + { + error ("midifile: bad file format: bad track chunk type"); + return 0; + } + type[0] = cP[0]; + type[1] = cP[1]; + type[2] = cP[2]; + type[3] = cP[3]; + type[4] = '\0'; + cP = buf; + n = fread(cP, 1L, 4L, x->fP); + x->offset += n; + if (n != 4L) + { + error("midifile: read %lu instead of 4", n); + return 0; + } + len = midifile_get_multibyte_4(cP); + x->track_chunk[index].chunk_length = len; + if (x->verbosity) post("midifile: Track chunk %d type: %s, length %lu", index, type, len); + if ((cP = getbytes(len)) == NULL) + { + error ("midifile: Unable to allocate %lu bytes for track data", len); + return 0; + } + x->track_chunk[index].track_data = cP; + n = fread(cP, 1L, len, x->fP); + + return 1; +} + +unsigned short midifile_combine_bytes(unsigned char data1, unsigned char data2) +/* make a short from two 7bit MIDI data bytes */ +{ +/* + unsigned short value = (unsigned short)data2; + value <<= 7; + value |= (unsigned short)data1; + return value; +*/ + return ((((unsigned short)data2)<< 7) | ((unsigned short)data1)); +} + +unsigned long midifile_get_multibyte_4(char*n) +/* make a long from 4 consecutive bytes in big-endian format */ +{ + unsigned long a, b, c, d, e; + a = (*(unsigned long *)(&n[0])) & 0x0FF; + b = (*(unsigned long *)(&n[1])) & 0x0FF; + c = (*(unsigned long *)(&n[2])) & 0x0FF; + d = (*(unsigned long *)(&n[3])) &0x0FF; + e = (a<<24) + (b<<16) + (c<<8) + d; + return e; +} + +unsigned long midifile_get_multibyte_3(char*n) +/* make a long from 3 consecutive bytes in big-endian format */ +{ + unsigned long a, b, c, d; + a = (*(unsigned long *)(&n[0])) & 0x0FF; + b = (*(unsigned long *)(&n[1])) & 0x0FF; + c = (*(unsigned long *)(&n[2])) & 0x0FF; + d = (a<<16) + (b<<8) + c; + return d; +} + +unsigned short midifile_get_multibyte_2(char*n) +/* make a short from 2 consecutive bytes in big-endian format */ +{ + unsigned short a, b, c; + a = (*(unsigned long *)(&n[0])) & 0x0FF; + b = (*(unsigned long *)(&n[1])) & 0x0FF; + c = (a<<8) + b; + return c; +} + + +int midifile_write_variable_length_value (FILE *fP, size_t value) +/* return number of characters written to fP */ +{ + size_t buffer; + int i; + char c; + + buffer = value & 0x07F; + while ((value >>= 7) > 0) + { + buffer <<= 8; + buffer |= 0x80; + buffer += (value & 0x07F); + } + i = 0; + while (1) + { + c = (char)(buffer & (0x0FF)); + putc(c, fP); + ++i; + if (buffer & 0x80) buffer >>= 8; + else break; + } + return i; +} + +char *midifile_read_var_len (char *cP, size_t *delta) +{ +/* enter with cP pointing to deltatime */ +/* set delta to deltatime */ +/* return pointer to following data */ + + unsigned long value; + char c; + + if (((value = *(cP++))) & 0x80) + { + value &= 0x7f; + do + { + value = (value << 7) + ((c = *(cP++)) & 0x7f); + } while (c & 0x80); + } + *delta = value; + return cP; +} + + +void midifile_verbosity(t_midifile *x, t_floatarg verbosity) +/* set verbosity of console output */ +{ + x->verbosity = verbosity; +} + +void midifile_single_track(t_midifile *x, t_floatarg track) +/* play only this track or all tracks if out of range */ +{ + if(x->state != mfReading) return; // only if we're reading + if ((track < 0) || (track >= x->header_chunk.chunk_ntrks)) + // anything out of range will be interpreted as all tracks + x->track = ALL_TRACKS; + else x->track = track; +} + +void midifile_dump(t_midifile *x, t_floatarg track) +{ + int index = (int)track; + + if(x->state != mfReading) return; // only if we're reading + if ((index < x->header_chunk.chunk_ntrks) && (index >= 0)) + midifile_dump_track_chunk_data(x, index); + else// anything out of range will be interpreted as all tracks + for (index = 0; index < x->header_chunk.chunk_ntrks; ++index) + midifile_dump_track_chunk_data(x, index); +} + +void midifile_rewind (t_midifile *x) +{ + if(x->state != mfReading) return; // only if we're reading + midifile_rewind_tracks(x); +} + +void midifile_rewind_tracks(t_midifile *x) +/* For all tracks, point to start of track_data */ +{ + int i; + for (i = 0; i < x->header_chunk.chunk_ntrks; ++i) + { + x->track_chunk[i].delta_time = 0L; + x->track_chunk[i].track_index = 0L; + x->track_chunk[i].total_time = 0L; + x->track_chunk[i].running_status = 0; + } + x->total_time = 0L; + x->ended = 0L; + outlet_float(x->total_time_outlet, x->total_time); +} + +size_t midifile_get_next_track_chunk_delta_time(t_midifile *x, int index) +/* return the delta_time of the next event in track[index] */ +{ + unsigned char *cP, *last_cP; + size_t delta_time; + + cP = x->track_chunk[index].track_data + x->track_chunk[index].track_index; + last_cP = x->track_chunk[index].track_data + x->track_chunk[index].chunk_length; + + delta_time = NO_MORE_ELEMENTS; + if ((cP != NULL) && (cP < last_cP) && (x->track_chunk[index].delta_time != NO_MORE_ELEMENTS)) cP = midifile_read_var_len(cP, &delta_time); +// if (x->verbosity) post("delta time for track[%d]: %lu", index, delta_time); + return delta_time; +} + +void midifile_output_long_list (t_outlet *outlet, unsigned char *cP, size_t len, unsigned char first_byte) +{ // ouput a long MIDI message as a list of floats + // first_byte is followed by len bytes at cP + size_t slen; + unsigned int si; + t_atom *slist; + + slen = (len+1L)*sizeof(t_atom); + slist = getbytes (slen); + if (slist == NULL) + { + error ("midifile: no memory for long list"); + return; + } + slist[0].a_type = A_FLOAT; + slist[0].a_w.w_float = 0xF0; + for (si = 0; si < len; ++si) + { + slist[si+1].a_type = A_FLOAT; + slist[si+1].a_w.w_float = cP[si]; + } + outlet_list(outlet, &s_list, len+1L, slist); + freebytes(slist, slen); +} + +void midifile_dump_track_chunk_data(t_midifile *x, int index) +/* parse entire track chunk and output it to the main window */ +{ + unsigned char *cP, *last_cP, *str; + size_t total_time, delta_time, time_sig, len; + unsigned char status, running_status, c, d, nn, dd, cc, bb, mi, mcp, ch; + char sf; + unsigned short sn; + unsigned char tt[3]; + char *msgPtr; + char msg[256]; + + cP = x->track_chunk[index].track_data; + last_cP = x->track_chunk[index].track_data + x->track_chunk[index].chunk_length; + total_time = 0L; + + post("midifile: Parsing track[%d]...", index); + while ((cP != NULL) && (cP < last_cP) && (x->track_chunk[index].delta_time != NO_MORE_ELEMENTS)) + { + msgPtr = msg; + cP = midifile_read_var_len(cP, &delta_time); + status = *cP++; + total_time += delta_time; + msgPtr += sprintf (msgPtr, "tick %lu delta %lu status %02X ", total_time, delta_time, status); + if ((status & 0xF0) == 0xF0) + { + switch (status) + { + case 0xF0: + case 0xF7: + cP = midifile_read_var_len(cP, &len);// not a time but the same variable length format + msgPtr += sprintf(msgPtr, "Sysex: %02X length %lu ", status, len); + cP += len; + break; + case 0xF3: // song select + c = *cP++; + msgPtr += sprintf(msgPtr, "Song Select: %d ", c); + break; + case 0xF2: // song position + c = *cP++; + d = *cP++; + msgPtr += sprintf(msgPtr, "Song Position %d ", midifile_combine_bytes(c, d)); + break; + case 0xF1: // quarter frame + msgPtr += sprintf(msgPtr, "MIDI Quarter Frame"); + break; + case 0xF6: // tune request + msgPtr += sprintf(msgPtr, "MIDI Tune Request"); + break; + case 0xF8: // MIDI clock + msgPtr += sprintf(msgPtr, "MIDI Clock"); + break; + case 0xF9: // MIDI tick + msgPtr += sprintf(msgPtr, "MIDI Tick"); + break; + case 0xFA: // MIDI start + msgPtr += sprintf(msgPtr, "MIDI Start"); + break; + case 0xFB: // MIDI continue + msgPtr += sprintf(msgPtr, "MIDI Continue"); + break; + case 0xFC: // MIDI stop + msgPtr += sprintf(msgPtr, "MIDI Stop"); + break; + case 0xFE: // active sense + msgPtr += sprintf(msgPtr, "MIDI Active Sense"); + break; + case 0xFF: + c = *cP++; + cP = midifile_read_var_len(cP, &len);// not a time but the same variable length format + msgPtr += sprintf(msgPtr, "Meta 0x%02X length %lu \n", c, len); + switch (c) + { + case 0x58: + nn = *cP++; + dd = *cP++; + dd = 1<<(dd); + cc = *cP++; + bb = *cP++; + msgPtr += sprintf(msgPtr, "Time Signature %d/%d %d clocks per tick, %d 32nd notes per quarter note", nn, dd, cc, bb); + break; + case 0x59: + sf = *(signed char*)cP++; + mi = *cP++; + msgPtr += sprintf(msgPtr, "Key Signature: %d %s, %s", sf, (sf<0)?"flats":"sharps", (mi)?"minor":"major"); + break; + case 0x51: + tt[0] = *cP++; + tt[1] = *cP++; + tt[2] = *cP++; + time_sig = midifile_get_multibyte_3(tt); + msgPtr += sprintf(msgPtr, "%lu microseconds per MIDI quarter-note", time_sig); + break; + case 0x2F: + msgPtr += sprintf(msgPtr, "========End of Track %d==========", index); + cP += len; + break; + case 0x21: + tt[0] = *cP++; + msgPtr += sprintf(msgPtr, "MIDI port or cable number (unofficial): %d", tt[0]); + break; + case 0x20: + mcp = *cP++; + msgPtr += sprintf(msgPtr, "MIDI Channel Prefix: %d", mcp); + break; + case 0x06: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + msgPtr += sprintf(msgPtr, "Marker %s", str); + cP[len] = c; + cP += len; + break; + case 0x05: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + msgPtr += sprintf(msgPtr, "Lyric %s", str); + cP[len] = c; + cP += len; + break; + case 0x04: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + msgPtr += sprintf(msgPtr, "Instrument Name %s", str); + cP[len] = c; + cP += len; + break; + case 0x03: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + msgPtr += sprintf(msgPtr, "Sequence/Track Name %s", str); + cP[len] = c; + cP += len; + break; + case 0x02: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + msgPtr += sprintf(msgPtr, "Copyright Notice %s", str); + cP[len] = c; + cP += len; + break; + case 0x01: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + msgPtr += sprintf(msgPtr, "Text %s", str); + cP[len] = c; + cP += len; + break; + case 0x00: + tt[0] = *cP++; + tt[1] = *cP++; + sn = midifile_get_multibyte_2(tt); + msgPtr += sprintf(msgPtr, "Sequence Number %d", sn); + break; + default: + msgPtr += sprintf(msgPtr, "Unknown: 0x%02X", c); + cP += len; + break; + } + break; + default: // 0xF4, 0xF5, 0xF9, 0xFD are not defined + msgPtr += sprintf(msgPtr, "Undefined: 0x%02X", status); + break; + } + } + else + { + if (status & 0x80) + { + running_status = status; + c = *cP++; + } + else + { + c = status; + status = running_status; + } + ch = (status & 0x0F) + 1; // MIDI channel number + switch (status & 0xF0) + { + case 0x80: + d = *cP++; // 2 data bytes + msgPtr += sprintf(msgPtr, "MIDI 0x%02X %02X %02X : channel %d Note %d Off velocity %d", status, c, d, ch, c, d); + break; + case 0x90: + d = *cP++; // 2 data bytes + if (d == 0) + msgPtr += sprintf(msgPtr,"MIDI 0x%02X %02X %02X : channel %d Note %d Off", status, c, d, ch, c); + else + msgPtr += sprintf(msgPtr,"MIDI 0x%02X %02X %02X : channel %d Note %d On velocity %d", status, c, d, ch, c, d); + break; + case 0xA0: + d = *cP++; // 2 data bytes + msgPtr += sprintf(msgPtr,"MIDI: 0x%02X %02X %02X : channel %d Note %d Aftertouch %d", status, c, d, ch, c, d); + break; + case 0xB0: + d = *cP++; // 2 data bytes + msgPtr += sprintf(msgPtr,"MIDI: 0x%02X %02X %02X : channel %d Controller %d: %d", status, c, d, ch, c, d); + break; + case 0xC0: // 1 data byte + msgPtr += sprintf(msgPtr,"MIDI: 0x%02X %02X: channel %d Program Change: %d", status, c, ch, c); + break; + case 0xD0: // 1 data byte + msgPtr += sprintf(msgPtr,"MIDI: 0x%02X %02X: channel %d Channel Pressure: %d", status, c, ch, c); + break; + case 0xE0: // 2 data bytes + d = *cP++; // 2 data bytes + msgPtr += sprintf(msgPtr,"MIDI: 0x%02X %02X %02X : channel %d Pitch Wheel %d", status, c, d, ch, midifile_combine_bytes(c, d)); + break; + } + } + post("midifile: %s", msg); + } +} + +void midifile_get_next_track_chunk_data(t_midifile *x, int index) +/* parse the next track chunk data element and output via the appropriate outlet or post to main window */ +/* Sets the delta_time of the element or NO_MORE_ELEMENTS if no more elements */ +{ + unsigned char *cP, *last_cP, *str; + size_t delta_time, time_sig, len, i; + unsigned char status, c, d, nn, dd, cc, bb, mi, mcp, n; + char sf; + unsigned short sn; + unsigned char tt[3]; + + cP = x->track_chunk[index].track_data + x->track_chunk[index].track_index; + last_cP = x->track_chunk[index].track_data + x->track_chunk[index].chunk_length; + +// if (x->verbosity) post("Parsing track[%d]: ", index); + delta_time = NO_MORE_ELEMENTS; + if ((cP != NULL) && (cP < last_cP) && (x->track_chunk[index].delta_time != NO_MORE_ELEMENTS)) + { + cP = midifile_read_var_len(cP, &delta_time); + status = *cP++; +// if (x->verbosity) post ("delta time %lu total_time %lu status %02X", delta_time, x->track_chunk[index].total_time, status); + if ((status & 0xF0) == 0xF0) + { + switch (status) + {// system message + case 0xF0: + case 0xF7: + cP = midifile_read_var_len(cP, &len); // packet length + if (x->verbosity) post("midifile: Sysex: %02X length %lu", status, len); + midifile_output_long_list(x->midi_list_outlet, cP, len, 0xF0); + /* + outlet_float(x->sysex_outlet, 0xF0); // sysex status + for (i = 0; i < len; ++i) outlet_float(x->sysex_outlet, cP[i]); // sysex packet + //if (cP[len-1] != 0xF7)outlet_float(x->sysex_outlet, 0xF0); // sysex terminator + */ + cP += len; + x->track_chunk[index].running_status = 0; + break; + case 0xF1: // quarter frame + x->midi_data[0].a_w.w_float = status; + outlet_list(x->midi_list_outlet, &s_list, 1, x->midi_data); + x->track_chunk[index].running_status = 0; + break; + case 0xF3: // song select + c = *cP++; + x->midi_data[0].a_w.w_float = status; + x->midi_data[1].a_w.w_float = c; + outlet_list(x->midi_list_outlet, &s_list, 2, x->midi_data); + x->track_chunk[index].running_status = 0; + break; + case 0xF2: // song position + c = *cP++; + x->midi_data[0].a_w.w_float = status; + x->midi_data[1].a_w.w_float = c; + c = *cP++; + x->midi_data[2].a_w.w_float = c; + outlet_list(x->midi_list_outlet, &s_list, 3, x->midi_data); + x->track_chunk[index].running_status = 0; + break; + case 0xF6: // tune request + x->midi_data[0].a_w.w_float = status; + outlet_list(x->midi_list_outlet, &s_list, 1, x->midi_data); + x->track_chunk[index].running_status = 0; + break; + case 0xF8: // MIDI clock + case 0xF9: // MIDI tick + case 0xFA: // MIDI start + case 0xFB: // MIDI continue + case 0xFC: // MIDI stop + case 0xFE: // active sense + x->midi_data[0].a_w.w_float = status; + outlet_list(x->midi_list_outlet, &s_list, 1, x->midi_data); + break; + case 0xFF: + c = *cP++; + cP = midifile_read_var_len(cP, &len);// meta length + if (x->verbosity) post("midifile: Track %d Meta: %02X length %lu", index, c, len); + switch (c) + { + case 0x58: + nn = *cP++; + dd = *cP++; + dd = 1<<(dd); + cc = *cP++; + bb = *cP++; + if (x->verbosity) post ("midifile: Time Signature: %d/%d %d clocks per tick, %d 32nd notes per quarternote", nn, dd, cc, bb); + break; + case 0x59: + sf = *(signed char *)cP++; + mi = *cP++; + if (x->verbosity) post ("midifile: Key Signature: %d %s, %s", sf, (sf<0)?"flats":"sharps", (mi)?"minor":"major"); + break; + case 0x51: + tt[0] = *cP++; + tt[1] = *cP++; + tt[2] = *cP++; + time_sig = midifile_get_multibyte_3(tt); + if (x->verbosity) post ("midifile: %lu microseconds per MIDI quarter-note", time_sig); + break; + case 0x2F: + if (x->verbosity) post ("midifile: End of Track %d", index); + delta_time = NO_MORE_ELEMENTS; + cP += len; + break; + case 0x21: + tt[0] = *cP++; + if (x->verbosity) post ("midifile: MIDI port or cable number (unofficial): %d", tt[0]); + break; + case 0x20: + mcp = *cP++; + if (x->verbosity) post ("midifile: MIDI Channel Prefix: %d", mcp); + break; + case 0x06: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + if (x->verbosity) post ("midifile: Marker: %s", str); + cP[len] = c; + cP += len; + break; + case 0x05: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + if (x->verbosity) post ("midifile: Lyric: %s", str); + cP[len] = c; + cP += len; + break; + case 0x04: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + if (x->verbosity) post ("midifile: Instrument Name: %s", str); + cP[len] = c; + cP += len; + break; + case 0x03: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + if (x->verbosity) post ("midifile: Sequence/Track Name: %s", str); + cP[len] = c; + cP += len; + break; + case 0x02: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + if (x->verbosity) post ("midifile: Copyright Notice: %s", str); + cP[len] = c; + cP += len; + break; + case 0x01: + str = cP; + c = cP[len]; + cP[len] = '\0'; //null terminate temporarily + if (x->verbosity) post ("midifile: Text Event: %s", str); + cP[len] = c; + cP += len; + break; + case 0x00: + tt[0] = *cP++; + tt[1] = *cP++; + sn = midifile_get_multibyte_2(tt); + if (x->verbosity) post ("midifile: Sequence Number %d", sn); + break; + default: + if (x->verbosity) post ("midifile: Unknown: %02X", c); + cP += len; + break; + } + break; + default: // 0xF4, 0xF5, 0xF9, 0xFD are not defined + break; + } + } + else + { + if (status & 0x80) + { + x->track_chunk[index].running_status = status;// status is true status + c = *cP++; + } + else + { + c = status; // status is actually 1st data byte + status = x->track_chunk[index].running_status;// current status + } + switch (status & 0xF0) + { + case 0x80: + case 0x90: + case 0xA0: + case 0xB0: + case 0xE0: + n = 3; + d = *cP++; // 2 data bytes + break; + case 0xC0: // 1 data byte + case 0xD0: + n = 2; + break; + } + x->midi_data[0].a_w.w_float = status; + x->midi_data[1].a_w.w_float = c; + x->midi_data[2].a_w.w_float = (n == 3)?d:0; + if (x->midi_data[0].a_w.w_float != 0) outlet_list(x->midi_list_outlet, &s_list, n, x->midi_data); + //if (x->verbosity) post("MIDI: %02X %d %d", x->track_chunk[index].running_status, c, d); + if (x->track_chunk[index].running_status == 0) + error ("midifile: No running status on track %d at %lu", index, x->track_chunk[index].total_time + delta_time); + } + } + x->track_chunk[index].track_index = (char *)cP - (char *)x->track_chunk[index].track_data; + x->track_chunk[index].delta_time = delta_time; + if (delta_time == NO_MORE_ELEMENTS) x->track_chunk[index].total_time = delta_time; + else x->track_chunk[index].total_time += delta_time; +} + +void midifile_skip_next_track_chunk_data(t_midifile *x, int index) +/* parse the next track chunk data element and skip it without any output */ +/* Sets the delta_time of the element or NO_MORE_ELEMENTS if no more elements */ +{ + unsigned char *cP, *last_cP; + size_t delta_time, len; + unsigned char status, c, n; + + cP = x->track_chunk[index].track_data + x->track_chunk[index].track_index; + last_cP = x->track_chunk[index].track_data + x->track_chunk[index].chunk_length; + +// if (x->verbosity) post("Parsing track[%d]: ", index); + delta_time = NO_MORE_ELEMENTS; + + if ((cP != NULL) && (cP < last_cP) && (x->track_chunk[index].delta_time != NO_MORE_ELEMENTS)) + { + cP = midifile_read_var_len(cP, &delta_time); + status = *cP++; +// if (x->verbosity) post ("delta time %lu total_time %lu status %02X", delta_time, x->track_chunk[index].total_time, status); + if ((status & 0xF0) == 0xF0) + { + switch (status) + {// system message + case 0xF0: + case 0xF7: + cP = midifile_read_var_len(cP, &len); // packet length + cP += len; + break; + case 0xF1: // quarter frame + break; + case 0xF3: // song select + cP += 1; + break; + case 0xF2: // song position + cP += 2; + break; + case 0xF6: // tune request + case 0xF8: // MIDI clock + case 0xF9: // MIDI tick + case 0xFA: // MIDI start + case 0xFB: // MIDI continue + case 0xFC: // MIDI stop + case 0xFE: // active sense + break; + case 0xFF: + c = *cP++; + cP = midifile_read_var_len(cP, &len);// meta length + // if (x->verbosity) post("Meta: %02X length %lu", c, len); + switch (c) + { + case 0x2F: + if (x->verbosity) post ("midifile: End of Track %d", index); + delta_time = NO_MORE_ELEMENTS; + // fall through to default.... + default: + cP += len; + break; + } + break; + default: // 0xF4, 0xF5, 0xF9, 0xFD are not defined + break; + } + } + else + { + if (status & 0x80) + { + x->track_chunk[index].running_status = status; + n = 1; + } + else + { + n = 0; // no status in this message + status = x->track_chunk[index].running_status; + } + switch (status & 0xF0) + { + case 0x80: + case 0x90: + case 0xA0: + case 0xB0: + case 0xE0: + n += 1; // data bytes + break; + case 0xC0: + case 0xD0:// only one data byte + break; + } + cP += n; + } + } + x->track_chunk[index].track_index = (char *)cP - (char *)x->track_chunk[index].track_data; + x->track_chunk[index].delta_time = delta_time; + if (delta_time == NO_MORE_ELEMENTS) x->track_chunk[index].total_time = delta_time; + else x->track_chunk[index].total_time += delta_time; +} + +/* fin midifile.c */ -- cgit v1.2.1