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2023.08.13

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sshlien
2023-09-13 17:36:44 -04:00
parent 1394cd96c5
commit 2bf0052eb8
4 changed files with 22 additions and 5 deletions
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2
VERSION
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@@ -1,2 +1,2 @@
September 11 2023
September 13 2023

1
doc/midistats.1
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@@ -43,6 +43,7 @@ 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.

2
doc/readme.txt
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@@ -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 0.74 September 11 2023
midistats version 0.75 September 13 2023
24th January 2002
Copyright James Allwright

22
midistats.c
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@@ -18,7 +18,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#define VERSION "0.74 September 11 2023 midistats"
#define VERSION "0.75 September 13 2023 midistats"
#include <limits.h>
/* Microsoft Visual C++ Version 6.0 or higher */
@@ -149,6 +149,7 @@ struct trkstat {
int quietTime[17];
int rhythmpatterns[17];
int numberOfGaps[17];
float pitchEntropy[17];
} trkdata;
/* The trkstat references the individual channels in the midi file.
@@ -172,6 +173,7 @@ int channel2nnotes[17]; /*maps channel to note count */
int chnactivity[17]; /* [SS] 2018-02-02 */
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 */
@@ -541,8 +543,10 @@ 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;
@@ -550,6 +554,7 @@ float histogram_entropy (int *histogram, int size)
e = p*log(p);
entropy = entropy + e;
}
//printf("\n");
return -entropy/log(2.0);
}
@@ -590,8 +595,9 @@ 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 %d",trkdata.notepitchmin[i], trkdata.notepitchmax[i] ,trkdata.notelengthmin[i], trkdata.notelengthmax[i], trkdata.numberOfGaps[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; /* in case channel i is used in another track */
trkdata.numberOfGaps[i] = 0;
@@ -625,14 +631,21 @@ void stats_trackstart()
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()
{
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();
}
@@ -645,7 +658,9 @@ 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) {
@@ -686,6 +701,7 @@ 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 */
}