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-rwxr-xr-xmidifile/midifile-help.pd173
-rwxr-xr-xmidifile/midifile.c1444
2 files changed, 1617 insertions, 0 deletions
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 <stdio.h>
+#include <string.h>
+
+#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 */
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-27 11:01:00 +0000