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2022.08.24

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This commit is contained in:
Seymour Shlien
2022-08-24 13:49:25 -04:00
parent 47181bf504
commit b3562b0c92
4 changed files with 39 additions and 4 deletions
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35
midi2abc.c
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@@ -45,7 +45,7 @@
* based on public domain 'midifilelib' package.
*/
#define VERSION "3.54 April 28 2022 midi2abc"
#define VERSION "3.56 August 24 2022 midi2abc"
#include <limits.h>
/* Microsoft Visual C++ Version 6.0 or higher */
@@ -97,6 +97,7 @@ static FILE *outhandle; /* for producing the abc file */
int tracknum=0; /* track number */
int division; /* pulses per quarter note defined in MIDI header */
int quietLimit; /* minumum number of pulses with no activity */
long tempo = 500000; /* the default tempo is 120 quarter notes/minute */
int unitlen; /* abc unit length usually defined in L: field */
int header_unitlen; /* first unitlen set */
@@ -265,6 +266,8 @@ struct trkstat {
int program[17];
int tempo[17];
int npulses[17];
int lastNoteOff[17];
int quietTime[17];
} trkdata;
/* The trkstat references the individual channels in the midi file.
@@ -1141,6 +1144,7 @@ void stats_header (int format, int ntrks, int ldivision)
{
int i;
division = ldivision;
quietLimit = ldivision*8;
printf("ntrks %d\n",ntrks);
printf("ppqn %d\n",ldivision);
chordthreshold = ldivision/16; /* [SS] 2018-01-21 */
@@ -1152,6 +1156,7 @@ void stats_header (int format, int ntrks, int ldivision)
trkdata.pitchbend[i] = 0;
trkdata.cntlparam[i] = 0; /* [SS] 2022-03-04 */
trkdata.pressure[i] = 0; /* [SS] 2022-03-04 */
trkdata.quietTime[i] = 0; /* [SS] 2022-08-22 */
progcolor[i] = 0;
channel2prog[i] = -1;
channel2nnotes[i] = 0;
@@ -1193,6 +1198,7 @@ void stats_finish()
int i; /* [SDG] 2020-06-03 */
int npulses;
int nprogs;
double delta;
npulses = trkdata.npulses[0];
printf("npulses %d\n",trkdata.npulses[0]);
@@ -1247,6 +1253,14 @@ if (npulses > 0)
for (i=1;i<17;i++) printf("%5.2f ",chnactivity[i]/(double) trkdata.npulses[0]);
else
for (i=0;i<17;i++) printf("%5.2f ",(double) chnactivity[i]);
printf("\nspread ");
for (i=1;i<17;i++) {
delta = trkdata.npulses[0] - trkdata.quietTime[i];
if (trkdata.quietTime[i] < quietLimit) delta = trkdata.npulses[0];
delta = delta / (double) trkdata.npulses[0];
printf (" %5.3f ", delta);
}
printf("\npitchentropy %f\n",histogram_entropy(pitchclass_activity,12));
printf("\n");
}
@@ -1363,12 +1377,22 @@ int chan, pitch, vol;
void stats_noteon(chan,pitch,vol)
int chan, pitch, vol;
{
int delta;
if (vol == 0) {
/* treat as noteoff */
stats_noteoff(chan,pitch,vol);
trkdata.lastNoteOff[chan+1] = Mf_currtime; /* [SS] 2022.08.22 */
return;
}
trkdata.notemeanpitch[chan+1] += pitch;
if (trkdata.lastNoteOff[chan+1] >= 0) {
delta = Mf_currtime - trkdata.lastNoteOff[chan+1];
trkdata.lastNoteOff[chan+1] = -1; /* in case of chord */
if (delta > quietLimit) {
trkdata.quietTime[chan+1] += delta;
}
}
if (abs(Mf_currtime - last_on_tick[chan+1]) < chordthreshold) trkdata.chordcount[chan+1]++;
else trkdata.notecount[chan+1]++; /* [SS] 2019-08-02 */
last_tick[chan+1] = Mf_currtime;
@@ -1404,6 +1428,7 @@ void stats_noteoff(int chan,int pitch,int vol)
if (last_tick[chan+1] == -1) return;
length = Mf_currtime - last_tick[chan+1];
trkdata.notelength[chan+1] += length;
trkdata.lastNoteOff[chan+1] = Mf_currtime; /* [SS] 2022.08.22 */
chnactivity[chan+1] += length;
if (chan == 9) return; /* drum channel */
pitchclass_activity[pitch % 12] += length;
@@ -1413,6 +1438,12 @@ void stats_noteoff(int chan,int pitch,int vol)
if(Mf_currtime > last_tick[chan+1]) last_tick[chan+1] = Mf_currtime;
}
void stats_eot () {
trkdata.lastNoteOff[0] = Mf_currtime; /* [SS] 2022.08.24 */
}
void mftxt_polypressure(chan,pitch,press)
int chan, pitch, press;
{
@@ -1826,7 +1857,7 @@ void initfunc_for_stats()
Mf_sysex = no_op2;
Mf_metamisc = no_op3;
Mf_seqnum = no_op1;
Mf_eot = no_op0;
Mf_eot = stats_eot;
Mf_timesig = stats_timesig;
Mf_smpte = no_op5;
Mf_tempo = stats_tempo;