Fix MIDI command timestamp calculations and synthesization duration.

- Improve variable naming to include time units for clarity
- Fix existing timestamp calculations to respect time units as well as track tempo (default values for now)
- Ensure the synthesizer produces PCM for the correct amount of time (including gaps between commands).

PiperOrigin-RevId: 458428243

libraries/test_data/src/test/assets/extractordumps/midi/Twinkle.mid.0.dump

@@ -5,7 +5,7 @@ seekMap:
 numberOfTracks = 1
 track 0:
   total output bytes = 96
-  sample count = 30
+  sample count = 96
   format 0:
     sampleMimeType = audio/midi
   sample 0:
@@ -21,111 +21,375 @@ track 0:
     flags = 1
     data = length 3, hash FFFED75B
   sample 3:
-    time = 128
+    time = 100000
+    flags = 1
+    data = length 0, hash 1
+  sample 4:
+    time = 200000
+    flags = 1
+    data = length 0, hash 1
+  sample 5:
+    time = 300000
+    flags = 1
+    data = length 0, hash 1
+  sample 6:
+    time = 400000
+    flags = 1
+    data = length 0, hash 1
+  sample 7:
+    time = 500000
     flags = 1
     data = length 3, hash FFFED733
-  sample 4:
+  sample 8:
-    time = 128
+    time = 500000
     flags = 1
     data = length 3, hash FFFED751
-  sample 5:
+  sample 9:
-    time = 256
+    time = 600000
+    flags = 1
+    data = length 0, hash 1
+  sample 10:
+    time = 700000
+    flags = 1
+    data = length 0, hash 1
+  sample 11:
+    time = 800000
+    flags = 1
+    data = length 0, hash 1
+  sample 12:
+    time = 900000
+    flags = 1
+    data = length 0, hash 1
+  sample 13:
+    time = 1000000
     flags = 1
     data = length 3, hash FFFED733
-  sample 6:
+  sample 14:
-    time = 256
+    time = 1000000
     flags = 1
     data = length 3, hash FFFED839
-  sample 7:
+  sample 15:
-    time = 384
+    time = 1100000
+    flags = 1
+    data = length 0, hash 1
+  sample 16:
+    time = 1200000
+    flags = 1
+    data = length 0, hash 1
+  sample 17:
+    time = 1300000
+    flags = 1
+    data = length 0, hash 1
+  sample 18:
+    time = 1400000
+    flags = 1
+    data = length 0, hash 1
+  sample 19:
+    time = 1500000
     flags = 1
     data = length 3, hash FFFED80C
-  sample 8:
+  sample 20:
-    time = 384
+    time = 1500000
     flags = 1
     data = length 3, hash FFFED83E
-  sample 9:
+  sample 21:
-    time = 512
+    time = 1600000
+    flags = 1
+    data = length 0, hash 1
+  sample 22:
+    time = 1700000
+    flags = 1
+    data = length 0, hash 1
+  sample 23:
+    time = 1800000
+    flags = 1
+    data = length 0, hash 1
+  sample 24:
+    time = 1900000
+    flags = 1
+    data = length 0, hash 1
+  sample 25:
+    time = 2000000
     flags = 1
     data = length 3, hash FFFED80C
-  sample 10:
+  sample 26:
-    time = 512
+    time = 2000000
     flags = 1
     data = length 3, hash FFFED877
-  sample 11:
+  sample 27:
-    time = 640
+    time = 2100000
+    flags = 1
+    data = length 0, hash 1
+  sample 28:
+    time = 2200000
+    flags = 1
+    data = length 0, hash 1
+  sample 29:
+    time = 2300000
+    flags = 1
+    data = length 0, hash 1
+  sample 30:
+    time = 2400000
+    flags = 1
+    data = length 0, hash 1
+  sample 31:
+    time = 2500000
     flags = 1
     data = length 3, hash FFFED84A
-  sample 12:
+  sample 32:
-    time = 640
+    time = 2500000
     flags = 1
     data = length 3, hash FFFED87C
-  sample 13:
+  sample 33:
-    time = 768
+    time = 2600000
+    flags = 1
+    data = length 0, hash 1
+  sample 34:
+    time = 2700000
+    flags = 1
+    data = length 0, hash 1
+  sample 35:
+    time = 2800000
+    flags = 1
+    data = length 0, hash 1
+  sample 36:
+    time = 2900000
+    flags = 1
+    data = length 0, hash 1
+  sample 37:
+    time = 3000000
     flags = 1
     data = length 3, hash FFFED84A
-  sample 14:
+  sample 38:
-    time = 768
+    time = 3000000
     flags = 1
     data = length 3, hash FFFED82F
-  sample 15:
+  sample 39:
-    time = 1024
+    time = 3100000
+    flags = 1
+    data = length 0, hash 1
+  sample 40:
+    time = 3200000
+    flags = 1
+    data = length 0, hash 1
+  sample 41:
+    time = 3300000
+    flags = 1
+    data = length 0, hash 1
+  sample 42:
+    time = 3400000
+    flags = 1
+    data = length 0, hash 1
+  sample 43:
+    time = 3500000
+    flags = 1
+    data = length 0, hash 1
+  sample 44:
+    time = 3600000
+    flags = 1
+    data = length 0, hash 1
+  sample 45:
+    time = 3700000
+    flags = 1
+    data = length 0, hash 1
+  sample 46:
+    time = 3800000
+    flags = 1
+    data = length 0, hash 1
+  sample 47:
+    time = 3900000
+    flags = 1
+    data = length 0, hash 1
+  sample 48:
+    time = 4000000
     flags = 1
     data = length 3, hash FFFED80C
-  sample 16:
+  sample 49:
-    time = 1024
+    time = 4000000
     flags = 1
     data = length 3, hash FFFED800
-  sample 17:
+  sample 50:
-    time = 1152
+    time = 4100000
+    flags = 1
+    data = length 0, hash 1
+  sample 51:
+    time = 4200000
+    flags = 1
+    data = length 0, hash 1
+  sample 52:
+    time = 4300000
+    flags = 1
+    data = length 0, hash 1
+  sample 53:
+    time = 4400000
+    flags = 1
+    data = length 0, hash 1
+  sample 54:
+    time = 4500000
     flags = 1
     data = length 3, hash FFFED7CE
-  sample 18:
+  sample 55:
-    time = 1152
+    time = 4500000
     flags = 1
     data = length 3, hash FFFED7FB
-  sample 19:
+  sample 56:
-    time = 1280
+    time = 4600000
+    flags = 1
+    data = length 0, hash 1
+  sample 57:
+    time = 4700000
+    flags = 1
+    data = length 0, hash 1
+  sample 58:
+    time = 4800000
+    flags = 1
+    data = length 0, hash 1
+  sample 59:
+    time = 4900000
+    flags = 1
+    data = length 0, hash 1
+  sample 60:
+    time = 5000000
     flags = 1
     data = length 3, hash FFFED7CE
-  sample 20:
+  sample 61:
-    time = 1280
+    time = 5000000
     flags = 1
     data = length 3, hash FFFED7E1
-  sample 21:
+  sample 62:
-    time = 1344
+    time = 5100000
+    flags = 1
+    data = length 0, hash 1
+  sample 63:
+    time = 5200000
+    flags = 1
+    data = length 0, hash 1
+  sample 64:
+    time = 5250000
     flags = 1
     data = length 3, hash FFFED7AF
-  sample 22:
+  sample 65:
-    time = 1408
+    time = 5350000
+    flags = 1
+    data = length 0, hash 1
+  sample 66:
+    time = 5450000
+    flags = 1
+    data = length 0, hash 1
+  sample 67:
+    time = 5500000
     flags = 1
     data = length 3, hash FFFED7D7
-  sample 23:
+  sample 68:
-    time = 1472
+    time = 5600000
+    flags = 1
+    data = length 0, hash 1
+  sample 69:
+    time = 5700000
+    flags = 1
+    data = length 0, hash 1
+  sample 70:
+    time = 5750000
     flags = 1
     data = length 3, hash FFFED7AF
-  sample 24:
+  sample 71:
-    time = 1536
+    time = 5850000
+    flags = 1
+    data = length 0, hash 1
+  sample 72:
+    time = 5950000
+    flags = 1
+    data = length 0, hash 1
+  sample 73:
+    time = 6000000
     flags = 1
     data = length 3, hash FFFED79E
-  sample 25:
+  sample 74:
-    time = 1600
+    time = 6100000
+    flags = 1
+    data = length 0, hash 1
+  sample 75:
+    time = 6200000
+    flags = 1
+    data = length 0, hash 1
+  sample 76:
+    time = 6250000
     flags = 1
     data = length 3, hash FFFED771
-  sample 26:
+  sample 77:
-    time = 1664
+    time = 6350000
+    flags = 1
+    data = length 0, hash 1
+  sample 78:
+    time = 6450000
+    flags = 1
+    data = length 0, hash 1
+  sample 79:
+    time = 6500000
     flags = 1
     data = length 3, hash FFFED7A3
-  sample 27:
+  sample 80:
-    time = 1728
+    time = 6600000
+    flags = 1
+    data = length 0, hash 1
+  sample 81:
+    time = 6700000
+    flags = 1
+    data = length 0, hash 1
+  sample 82:
+    time = 6750000
     flags = 1
     data = length 3, hash FFFED771
-  sample 28:
+  sample 83:
-    time = 1792
+    time = 6850000
+    flags = 1
+    data = length 0, hash 1
+  sample 84:
+    time = 6950000
+    flags = 1
+    data = length 0, hash 1
+  sample 85:
+    time = 7000000
     flags = 1
     data = length 3, hash FFFED751
-  sample 29:
+  sample 86:
-    time = 2048
+    time = 7100000
+    flags = 1
+    data = length 0, hash 1
+  sample 87:
+    time = 7200000
+    flags = 1
+    data = length 0, hash 1
+  sample 88:
+    time = 7300000
+    flags = 1
+    data = length 0, hash 1
+  sample 89:
+    time = 7400000
+    flags = 1
+    data = length 0, hash 1
+  sample 90:
+    time = 7500000
+    flags = 1
+    data = length 0, hash 1
+  sample 91:
+    time = 7600000
+    flags = 1
+    data = length 0, hash 1
+  sample 92:
+    time = 7700000
+    flags = 1
+    data = length 0, hash 1
+  sample 93:
+    time = 7800000
+    flags = 1
+    data = length 0, hash 1
+  sample 94:
+    time = 7900000
+    flags = 1
+    data = length 0, hash 1
+  sample 95:
+    time = 8000000
     flags = 1
     data = length 3, hash FFFED733
 tracksEnded = true

libraries/test_data/src/test/assets/extractordumps/midi/Twinkle.mid.unknown_length.dump

@@ -5,7 +5,7 @@ seekMap:
 numberOfTracks = 1
 track 0:
   total output bytes = 96
-  sample count = 30
+  sample count = 96
   format 0:
     sampleMimeType = audio/midi
   sample 0:
@@ -21,111 +21,375 @@ track 0:
     flags = 1
     data = length 3, hash FFFED75B
   sample 3:
-    time = 128
+    time = 100000
+    flags = 1
+    data = length 0, hash 1
+  sample 4:
+    time = 200000
+    flags = 1
+    data = length 0, hash 1
+  sample 5:
+    time = 300000
+    flags = 1
+    data = length 0, hash 1
+  sample 6:
+    time = 400000
+    flags = 1
+    data = length 0, hash 1
+  sample 7:
+    time = 500000
     flags = 1
     data = length 3, hash FFFED733
-  sample 4:
+  sample 8:
-    time = 128
+    time = 500000
     flags = 1
     data = length 3, hash FFFED751
-  sample 5:
+  sample 9:
-    time = 256
+    time = 600000
+    flags = 1
+    data = length 0, hash 1
+  sample 10:
+    time = 700000
+    flags = 1
+    data = length 0, hash 1
+  sample 11:
+    time = 800000
+    flags = 1
+    data = length 0, hash 1
+  sample 12:
+    time = 900000
+    flags = 1
+    data = length 0, hash 1
+  sample 13:
+    time = 1000000
     flags = 1
     data = length 3, hash FFFED733
-  sample 6:
+  sample 14:
-    time = 256
+    time = 1000000
     flags = 1
     data = length 3, hash FFFED839
-  sample 7:
+  sample 15:
-    time = 384
+    time = 1100000
+    flags = 1
+    data = length 0, hash 1
+  sample 16:
+    time = 1200000
+    flags = 1
+    data = length 0, hash 1
+  sample 17:
+    time = 1300000
+    flags = 1
+    data = length 0, hash 1
+  sample 18:
+    time = 1400000
+    flags = 1
+    data = length 0, hash 1
+  sample 19:
+    time = 1500000
     flags = 1
     data = length 3, hash FFFED80C
-  sample 8:
+  sample 20:
-    time = 384
+    time = 1500000
     flags = 1
     data = length 3, hash FFFED83E
-  sample 9:
+  sample 21:
-    time = 512
+    time = 1600000
+    flags = 1
+    data = length 0, hash 1
+  sample 22:
+    time = 1700000
+    flags = 1
+    data = length 0, hash 1
+  sample 23:
+    time = 1800000
+    flags = 1
+    data = length 0, hash 1
+  sample 24:
+    time = 1900000
+    flags = 1
+    data = length 0, hash 1
+  sample 25:
+    time = 2000000
     flags = 1
     data = length 3, hash FFFED80C
-  sample 10:
+  sample 26:
-    time = 512
+    time = 2000000
     flags = 1
     data = length 3, hash FFFED877
-  sample 11:
+  sample 27:
-    time = 640
+    time = 2100000
+    flags = 1
+    data = length 0, hash 1
+  sample 28:
+    time = 2200000
+    flags = 1
+    data = length 0, hash 1
+  sample 29:
+    time = 2300000
+    flags = 1
+    data = length 0, hash 1
+  sample 30:
+    time = 2400000
+    flags = 1
+    data = length 0, hash 1
+  sample 31:
+    time = 2500000
     flags = 1
     data = length 3, hash FFFED84A
-  sample 12:
+  sample 32:
-    time = 640
+    time = 2500000
     flags = 1
     data = length 3, hash FFFED87C
-  sample 13:
+  sample 33:
-    time = 768
+    time = 2600000
+    flags = 1
+    data = length 0, hash 1
+  sample 34:
+    time = 2700000
+    flags = 1
+    data = length 0, hash 1
+  sample 35:
+    time = 2800000
+    flags = 1
+    data = length 0, hash 1
+  sample 36:
+    time = 2900000
+    flags = 1
+    data = length 0, hash 1
+  sample 37:
+    time = 3000000
     flags = 1
     data = length 3, hash FFFED84A
-  sample 14:
+  sample 38:
-    time = 768
+    time = 3000000
     flags = 1
     data = length 3, hash FFFED82F
-  sample 15:
+  sample 39:
-    time = 1024
+    time = 3100000
+    flags = 1
+    data = length 0, hash 1
+  sample 40:
+    time = 3200000
+    flags = 1
+    data = length 0, hash 1
+  sample 41:
+    time = 3300000
+    flags = 1
+    data = length 0, hash 1
+  sample 42:
+    time = 3400000
+    flags = 1
+    data = length 0, hash 1
+  sample 43:
+    time = 3500000
+    flags = 1
+    data = length 0, hash 1
+  sample 44:
+    time = 3600000
+    flags = 1
+    data = length 0, hash 1
+  sample 45:
+    time = 3700000
+    flags = 1
+    data = length 0, hash 1
+  sample 46:
+    time = 3800000
+    flags = 1
+    data = length 0, hash 1
+  sample 47:
+    time = 3900000
+    flags = 1
+    data = length 0, hash 1
+  sample 48:
+    time = 4000000
     flags = 1
     data = length 3, hash FFFED80C
-  sample 16:
+  sample 49:
-    time = 1024
+    time = 4000000
     flags = 1
     data = length 3, hash FFFED800
-  sample 17:
+  sample 50:
-    time = 1152
+    time = 4100000
+    flags = 1
+    data = length 0, hash 1
+  sample 51:
+    time = 4200000
+    flags = 1
+    data = length 0, hash 1
+  sample 52:
+    time = 4300000
+    flags = 1
+    data = length 0, hash 1
+  sample 53:
+    time = 4400000
+    flags = 1
+    data = length 0, hash 1
+  sample 54:
+    time = 4500000
     flags = 1
     data = length 3, hash FFFED7CE
-  sample 18:
+  sample 55:
-    time = 1152
+    time = 4500000
     flags = 1
     data = length 3, hash FFFED7FB
-  sample 19:
+  sample 56:
-    time = 1280
+    time = 4600000
+    flags = 1
+    data = length 0, hash 1
+  sample 57:
+    time = 4700000
+    flags = 1
+    data = length 0, hash 1
+  sample 58:
+    time = 4800000
+    flags = 1
+    data = length 0, hash 1
+  sample 59:
+    time = 4900000
+    flags = 1
+    data = length 0, hash 1
+  sample 60:
+    time = 5000000
     flags = 1
     data = length 3, hash FFFED7CE
-  sample 20:
+  sample 61:
-    time = 1280
+    time = 5000000
     flags = 1
     data = length 3, hash FFFED7E1
-  sample 21:
+  sample 62:
-    time = 1344
+    time = 5100000
+    flags = 1
+    data = length 0, hash 1
+  sample 63:
+    time = 5200000
+    flags = 1
+    data = length 0, hash 1
+  sample 64:
+    time = 5250000
     flags = 1
     data = length 3, hash FFFED7AF
-  sample 22:
+  sample 65:
-    time = 1408
+    time = 5350000
+    flags = 1
+    data = length 0, hash 1
+  sample 66:
+    time = 5450000
+    flags = 1
+    data = length 0, hash 1
+  sample 67:
+    time = 5500000
     flags = 1
     data = length 3, hash FFFED7D7
-  sample 23:
+  sample 68:
-    time = 1472
+    time = 5600000
+    flags = 1
+    data = length 0, hash 1
+  sample 69:
+    time = 5700000
+    flags = 1
+    data = length 0, hash 1
+  sample 70:
+    time = 5750000
     flags = 1
     data = length 3, hash FFFED7AF
-  sample 24:
+  sample 71:
-    time = 1536
+    time = 5850000
+    flags = 1
+    data = length 0, hash 1
+  sample 72:
+    time = 5950000
+    flags = 1
+    data = length 0, hash 1
+  sample 73:
+    time = 6000000
     flags = 1
     data = length 3, hash FFFED79E
-  sample 25:
+  sample 74:
-    time = 1600
+    time = 6100000
+    flags = 1
+    data = length 0, hash 1
+  sample 75:
+    time = 6200000
+    flags = 1
+    data = length 0, hash 1
+  sample 76:
+    time = 6250000
     flags = 1
     data = length 3, hash FFFED771
-  sample 26:
+  sample 77:
-    time = 1664
+    time = 6350000
+    flags = 1
+    data = length 0, hash 1
+  sample 78:
+    time = 6450000
+    flags = 1
+    data = length 0, hash 1
+  sample 79:
+    time = 6500000
     flags = 1
     data = length 3, hash FFFED7A3
-  sample 27:
+  sample 80:
-    time = 1728
+    time = 6600000
+    flags = 1
+    data = length 0, hash 1
+  sample 81:
+    time = 6700000
+    flags = 1
+    data = length 0, hash 1
+  sample 82:
+    time = 6750000
     flags = 1
     data = length 3, hash FFFED771
-  sample 28:
+  sample 83:
-    time = 1792
+    time = 6850000
+    flags = 1
+    data = length 0, hash 1
+  sample 84:
+    time = 6950000
+    flags = 1
+    data = length 0, hash 1
+  sample 85:
+    time = 7000000
     flags = 1
     data = length 3, hash FFFED751
-  sample 29:
+  sample 86:
-    time = 2048
+    time = 7100000
+    flags = 1
+    data = length 0, hash 1
+  sample 87:
+    time = 7200000
+    flags = 1
+    data = length 0, hash 1
+  sample 88:
+    time = 7300000
+    flags = 1
+    data = length 0, hash 1
+  sample 89:
+    time = 7400000
+    flags = 1
+    data = length 0, hash 1
+  sample 90:
+    time = 7500000
+    flags = 1
+    data = length 0, hash 1
+  sample 91:
+    time = 7600000
+    flags = 1
+    data = length 0, hash 1
+  sample 92:
+    time = 7700000
+    flags = 1
+    data = length 0, hash 1
+  sample 93:
+    time = 7800000
+    flags = 1
+    data = length 0, hash 1
+  sample 94:
+    time = 7900000
+    flags = 1
+    data = length 0, hash 1
+  sample 95:
+    time = 8000000
     flags = 1
     data = length 3, hash FFFED733
 tracksEnded = true