source: buchla-68k/orig/DOC/SCRFILE.TXT@ cbe2c15

Last change on this file since cbe2c15 was 3ae31e9, checked in by Thomas Lopatic <thomas@…>, 7 years ago

Imported original source code.
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[3ae31e9]1MIDAS-VII Score (M7SLOTnn.SCR) File Format 1988-06-28 Rev 2
2------------------------------------------ ---------- -----
3
4 . Scores are stored in files with up to 20 scores per file.
5 . Scores are stored on disk in packed form and unpacked when loaded.
6 . An empty score takes only a 4 byte length flag (-1L) on disk.
7
8. Each file consists of:
9
10 Library Header Record 56 bytes
11 --------------------- --------
12
13 . Every MIDAS-VII library file has a header, as follows:
14
15 struct mlibhdr { /* MIDAS library file header */
16
17 char l_csum[8]; /* checksum in HEX ASCII, of all but l_csum[] */
18 char l_name[8]; /* file name */
19 char l_type[3]; /* file type (SCR for a score) */
20 char l_cmnt[37]; /* comment */
21 };
22
23
24 Total longs required 4 bytes
25 -------------------- -------
26
27 . Total number of longs required in RAM to load all of the scores.
28
29 Scores 01-20
30 ------------
31
32 . All scores start with their length:
33
34 nbr 4 bytes Number of longs required,
35 or -1L if the score is empty
36
37 . Non-Empty scores have the following additional data:
38
39 scname 16 bytes Score name (not zero terminated)
40
41 stimes 240 bytes Section flags and SMPTE times
42
43 table: 20 entries, 1 per section, 12 bytes per section
44
45 struct s_time { /* section time structure */
46
47 short sflags; /* flags */
48 char smpte[10]; /* SMPTE start timecode */
49 };
50
51 events 5..32 bytes Packed event data
52
53 . See "MIDAS-VII Score Event Formats" for details.
54
55
56MIDAS-VII Score Event Sizes (in bytes)
57---------------------------------------
58
59. Standard event sizes in RAM:
60
61 E_SIZE1 20 bytes
62 E_SIZE2 24 bytes
63 E_SIZE3 32 bytes
64
65. Event sizes in RAM and on disk:
66
67 size score disk type
68 ------- ----- ---- --------------
69 E_SIZE1 20 0 0 - EV_NULL
70 E_SIZE1 20 6 1 - EV_SCORE
71 E_SIZE2 24 6 2 - EV_SBGN
72 E_SIZE2 24 6 3 - EV_SEND
73 E_SIZE2 24 7 4 - EV_INST
74 E_SIZE1 20 9 5 - EV_NBEG
75 E_SIZE1 20 9 6 - EV_NEND
76 E_SIZE1 20 5 7 - EV_STOP
77 E_SIZE1 20 7 8 - EV_INTP
78 E_SIZE2 24 6 9 - EV_TMPO
79 E_SIZE2 24 6 10 - EV_TUNE
80 E_SIZE2 24 7 11 - EV_GRP
81 E_SIZE2 24 7 12 - EV_LOCN
82 E_SIZE2 24 7 13 - EV_DYN
83 E_SIZE2 24 8 14 - EV_ANVL
84 E_SIZE2 24 7 15 - EV_ANRS
85 E_SIZE2 24 6 16 - EV_ASGN
86 E_SIZE3 32 8 17 - EV_TRNS
87 E_SIZE1 20 6 18 - EV_REPT
88 E_SIZE1 20 6 19 - EV_PNCH
89 E_SIZE1 20 7 20 - EV_PRES
90 E_SIZE1 20 6 21 - EV_FINI
91 E_SIZE1 20 7 22 - EV_CPRS
92 E_SIZE1 20 5 23 - EV_BAR
93
94MIDAS-VII Event Formats on Disk
95-------------------------------
96
97 . All events are stored on disk in compressed form as:
98
99 +0 1 byte type code,
100
101 +1 4 bytes time (in absolute frames),
102
103 +5 0 to 4 bytes parameter data.
104
105
106 Type Format on disk
107 -------- ------------------------------
108 EV_NULL -- not stored on disk --
109 EV_SCORE 01 tt tt tt tt nn
110 EV_SBGN 02 tt tt tt tt ss
111 EV_SEND 03 tt tt tt tt ss
112 EV_INST 04 tt tt tt tt gg ii
113 EV_NBEG 05 tt tt tt tt nn gg vv vv
114 EV_NEND 06 tt tt tt tt nn gg vv vv
115 EV_STOP 07 tt tt tt tt
116 EV_INTP 08 tt tt tt tt ii ii
117 EV_TMPO 09 tt tt tt tt vv
118 EV_TUNE 0A tt tt tt tt nn
119 EV_GRP 0B tt tt tt tt gg ss
120 EV_LOCN 0C tt tt tt tt gg ll
121 EV_DYN 0D tt tt tt tt gg dd
122 EV_ANVL 0E tt tt tt tt vg vv vv
123 EV_ANRS 0F tt tt tt tt vg rr
124 EV_ASGN 10 tt tt tt tt nn
125 EV_TRNS 11 tt tt tt tt gg cc cc
126 EV_REPT 12 tt tt tt tt cc
127 EV_PNCH 13 tt tt tt tt cc
128 EV_PRES 14 tt tt tt tt kk pp (OBSOLETE)
129 EV_FINI 15 tt tt tt tt ss
130 EV_CPRS 16 tt tt tt tt gg pp (OBSOLETE)
131 EV_BAR 17 tt tt tt tt
132 EV_NEXT 18 tt tt tt tt
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