2023.10.25

VERSION

@@ -1,2 +1,2 @@
-August 31 2023
+October 25 2023
 

doc/CHANGES

@@ -15103,4 +15103,7 @@ stats_noteon(). In function, output_track_summary(), suppressed
 notemeanpitch for percussion channel.
 
 
+October 25 2023
+
+Midistats returns track activity (note on/off) for every track.
 

doc/midistats.1

@@ -1,4 +1,4 @@
-.TH MIDISTATS 1 "9 December 2022"
+.TH MIDISTATS 1 "25 October 2023"
 .SH NAME
 \fBmidistats\fP \- program to summarize the statistical properties of a midi file
 .SH SYNOPSIS
@@ -36,11 +36,14 @@ the sum of the MIDI pitches for all the notes,
 the sum of the note durations in MIDI pulse units,
 the number of control parameter messages,
 the number of pressure messages.
-and the number of distinct rhythm patterns for each channel
+the number of distinct rhythm patterns for each channel
+the number of pulses the channel was inactive
 the minimum pitch value
 the maximum pitch value
 the minimum note length in pulses
 the maximum note length in pulses
+the number of gaps in the channel
+the entropy of the pitch class histogram for that channel
 .PP
 After processing all the individual tracks, the following information
 applies to the entire midi file.
@@ -74,9 +77,9 @@ that occur in the midi file.
 pitchact is a similar histogram but is weighted by the length of
 the notes.
 .PP
-quietTime is used to compute the track/channel spread in midiexplorer.
-It is computed by summing up all the midi pulses which occur
-in gaps greater than 8 beats.
+chnact returns the amount of note activity in each channel.
+.PP
+trkact returns the number of notes in each track.
 .PP
 totalrhythmpatterns is the total number of bar rhythm patterns for
 all channels except the percussion channel.

doc/readme.txt

@@ -6,7 +6,7 @@ abc2abc  version 2.20 February 07 2023
 yaps     version 1.92 January 06 2023
 abcmatch version 1.82 June 14 2022
 midicopy version 1.38 May 06 2022
-midistats version 0.72 August 31 2023
+midistats version 0.77 October 25 2023
 
 24th January 2002
 Copyright James Allwright

midistats.c

@@ -18,7 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
  */
  
-#define VERSION "0.72 August 31 2023 midistats"
+#define VERSION "0.77 October 25 2023 midistats"
 
 #include <limits.h>
 /* Microsoft Visual C++ Version 6.0 or higher */
@@ -63,6 +63,7 @@ static FILE *F;
 static FILE *outhandle; /* for producing the abc file */
 
 int tracknum=0;  /* track number */
+int lasttrack = 0; /* lasttrack */
 int division;    /* pulses per quarter note defined in MIDI header    */
 int quietLimit;  /* minimum number of pulses with no activity */
 long tempo = 500000; /* the default tempo is 120 quarter notes/minute */
@@ -118,6 +119,7 @@ int notechan[2048],notechanvol[2048]; /*for linking on and off midi
 int lastTick[2048]; /* for getting last pulse number for chan (0-15) and pitch (0-127) in MIDI file */
 int last_on_tick[17]; /* for detecting chords [SS] 2019-08-02 */
 int channel_active[17]; /* for dealing with chords [SS] 2023-08-30 */
+int channel_used_in_track[17]; /* for dealing with quietTime [SS] 2023-09-06 */
 
 int histogram[256];
 unsigned char drumpat[8000];
@@ -147,6 +149,8 @@ struct trkstat {
   int lastNoteOff[17];
   int quietTime[17];
   int rhythmpatterns[17];
+  int numberOfGaps[17];
+  float pitchEntropy[17];
   } trkdata;
 
 /* The trkstat references the individual channels in the midi file.
@@ -168,8 +172,10 @@ int pitchhistogram[12]; /* pitch distribution for non drum notes */
 int channel2prog[17]; /* maps channel to program */
 int channel2nnotes[17]; /*maps channel to note count */
 int chnactivity[17]; /* [SS] 2018-02-02 */
+int trkactivity[40]; /* [SS] 2023-10-25 */
 int progactivity[128]; /* [SS] 2018-02-02 */
 int pitchclass_activity[12]; /* [SS] 2018-02-02 */
+int chanpitchhistogram[204]; /* [SS] 2023-09-13 */
 
 
 /* [SS] 2017-11-01 */
@@ -413,6 +419,7 @@ void stats_header (int format, int ntrks, int ldivision)
   quietLimit = ldivision*8;
   divisionsPerBar = division*beatsPerBar;
   unitDivision = divisionsPerBar/24;
+  lasttrack = ntrks; /* [SS] 2023-10-25 */
   printf("ntrks %d\n",ntrks);
   printf("ppqn %d\n",ldivision);
   chordthreshold = ldivision/16; /* [SS] 2018-01-21 */
@@ -425,6 +432,7 @@ void stats_header (int format, int ntrks, int ldivision)
     trkdata.cntlparam[i] = 0; /* [SS] 2022-03-04 */
     trkdata.pressure[i] = 0; /* [SS] 2022-03-04 */
     trkdata.quietTime[i] = 0; /* [SS] 2022-08-22 */
+    trkdata.numberOfGaps[i] = 0; /* [SS] 2023-09-07 */
     progcolor[i] = 0;
     channel2prog[i] = 0; /* [SS] 2023-06-25-8/
     channel2nnotes[i] = 0;
@@ -434,6 +442,7 @@ void stats_header (int format, int ntrks, int ldivision)
   for (i=0;i<12;i++) pitchhistogram[i] = 0; /* [SS] 2017-11-01 */
   for (i=0;i<12;i++) pitchclass_activity[i] = 0; /* [SS] 2018-02-02 */
   for (i=0;i<128;i++) progactivity[i] = 0; /* [SS] 2018-02-02 */
+  for (i=0;i<40;i++) trkactivity[i]=0; /* [SS] 2023-10-25 */
 }
 
 void determine_progcolor ()
@@ -519,17 +528,12 @@ else
   for (i=0;i<12;i++) printf("%5.2f ",(double) pitchclass_activity[i]);
 printf("\nchnact "); /* [SS] 2018-02-08 */
 if (npulses > 0)
-  for (i=1;i<17;i++) printf("%5.2f ",chnactivity[i]/(double) trkdata.npulses[0]);
+  for (i=1;i<17;i++) printf("%5.3f ",chnactivity[i]/(double) trkdata.npulses[0]);
 else 
-  for (i=0;i<17;i++) printf("%5.2f ",(double) chnactivity[i]);
-printf("\nquietTime ");
-for (i=1;i<17;i++) {
-  delta = trkdata.npulses[0] - trkdata.quietTime[i];
-  if (trkdata.quietTime[i] < quietLimit) delta = 0;
-  delta = delta / (double) trkdata.npulses[0];
-  /* printf (" %5.3f ", delta); */
-  printf (" %d ", trkdata.quietTime[i]);
-  }
+  for (i=0;i<17;i++) printf("%5.3f ",(double) chnactivity[i]);
+printf("\ntrkact ");
+  lasttrack++;
+  for (i=0;i<lasttrack;i++) printf("% 5d",trkactivity[i]);
 
 printf("\npitchentropy %f\n",histogram_entropy(pitchclass_activity,12));
 printf("totalrhythmpatterns =%d\n",nrpatterns);
@@ -547,8 +551,10 @@ float histogram_entropy (int *histogram, int size)
   float e,p;
   total = 0;
   entropy = 0.0;
+  //printf("\nhistogram_entropy of:");
   for (i=0;i<size;i++) {
     total += histogram[i];
+    //printf(" %d",histogram[i]);
     } 
   for (i=0;i<size;i++) {
     if (histogram[i] < 1) continue;
@@ -556,6 +562,7 @@ float histogram_entropy (int *histogram, int size)
     e = p*log(p);
     entropy = entropy + e;
     } 
+  //printf("\n");
   return -entropy/log(2.0);
   } 
 
@@ -596,10 +603,12 @@ for (i=1;i<17;i++) {
      printf("-1  0 ");
    printf("%d %d ",trkdata.cntlparam[i],trkdata.pressure[i]); /* [SS] 2022-03-04 */
    printf("%d %d ",trkdata.quietTime[i],trkdata.rhythmpatterns[i]);
-   if (i != 10)  printf("%d %d %d %d",trkdata.notepitchmin[i],  trkdata.notepitchmax[i] ,trkdata.notelengthmin[i],  trkdata.notelengthmax[i]);
-   else
+   if (i != 10)  {printf("%d %d %d %d %d",trkdata.notepitchmin[i],  trkdata.notepitchmax[i] ,trkdata.notelengthmin[i],  trkdata.notelengthmax[i], trkdata.numberOfGaps[i]);
+   printf(" %f",trkdata.pitchEntropy[i]);
+    } else
      printf("-1 0");
-   trkdata.quietTime[i] = 0;
+   trkdata.quietTime[i] = 0; /* in case channel i is used in another track */
+   trkdata.numberOfGaps[i] = 0;
    printf("\n");
 
    channel2nnotes[i] += trkdata.notecount[i] + trkdata.chordcount[i];
@@ -629,12 +638,22 @@ void stats_trackstart()
   printf("trk %d \n",tracknum);
 
  for (i=0;i<2048;i++) lastTick[i] = -1;
+ for (i=0;i<17;i++) channel_used_in_track[i] = 0; /* [SS] 2023-09-06 */
+ for (i=0;i<204;i++) chanpitchhistogram[i] = 0;  /* [SS] 2023-09-13 */
 }
 
 void stats_trackend()
 {
- trkdata.npulses[tracknum] = Mf_currtime; 
+ int chan;
+ int i;
+ float entropy;
  if (trkdata.npulses[0] < Mf_currtime) trkdata.npulses[0] = Mf_currtime;
+ for (chan = 1; chan < 17; chan++) /* [SS] 2023-09-06 */
+   if (channel_used_in_track[chan] > 0) trkdata.quietTime[chan] += (trkdata.npulses[0] - trkdata.lastNoteOff[chan]); 
+ for (chan=0;chan<16;chan++) {  /* 2023-09-13 */
+   if (chan == 9 || channel_used_in_track[chan+1] == 0) continue;
+   trkdata.pitchEntropy[chan+1] = histogram_entropy(chanpitchhistogram +chan*12,11);
+   }
  output_track_summary(); 
 }
 
@@ -647,7 +666,10 @@ int chan, pitch, vol;
  int barnum;
  int unit;
  int dithermargin; /* [SS] 2023-08-22 */
+ int cpitch; /* [SS] 2023-09-13 */
 
+ cpitch = pitch % 12;
+ channel_used_in_track[chan+1]++; /* [SS] 2023-09-06 */
  dithermargin = unitDivision/2 - 1; 
  if (vol == 0) {
     /* treat as noteoff */
@@ -660,9 +682,10 @@ int chan, pitch, vol;
  trkdata.notepitchmin[chan+1] = min(trkdata.notepitchmin[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;
+                 trkdata.numberOfGaps[chan+1]++;
+	         trkdata.lastNoteOff[chan+1] = -1; /* in case of chord */
 	 }
     }
 	 
@@ -686,6 +709,7 @@ int chan, pitch, vol;
   unit = ((Mf_currtime+dithermargin) % divisionsPerBar)/unitDivision;
   //printf("unit = %d pattern = %d \n",unit,barChn[chan].rhythmPattern);
   barChn[chan].rhythmPattern = barChn[chan].rhythmPattern |= (1UL << unit);
+  chanpitchhistogram[chan*12+cpitch]++;  /* [SS] 2023-09-13 */
   }
 
 
@@ -715,9 +739,10 @@ void stats_noteoff(int chan,int pitch,int vol)
   trkdata.notelength[chan+1] += length;
   trkdata.notelengthmax[chan+1] = max(trkdata.notelengthmax[chan+1],length);
   trkdata.notelengthmin[chan+1] = min(trkdata.notelengthmin[chan+1],length);
-  if (length < 3) printf("chan = %d  lasttick = %d currtime = %ld\n",chan,lastTick[chan*128+pitch],Mf_currtime);
+  //if (length < 3) printf("chan = %d  lasttick = %d currtime = %ld\n",chan,lastTick[chan*128+pitch],Mf_currtime);
   trkdata.lastNoteOff[chan+1] = Mf_currtime; /* [SS] 2022.08.22 */
   chnactivity[chan+1] += length;
+  trkactivity[tracknum]++;
   if (chan == 9) return; /* drum channel */
   pitchclass_activity[pitch % 12] += length;
   program = trkdata.program[chan+1];