[f40a309] | 1 | /*
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| 2 | =============================================================================
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| 3 | initi.c -- MIDAS-VII - instrument editor support functions
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| 4 | Version 2 -- 1989-12-19 -- D.N. Lynx Crowe
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| 5 | =============================================================================
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| 6 | */
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| 7 |
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| 8 | #define DEBUGPS 0 /* define non-zero to debug pntsel() */
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| 9 |
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[b28a12e] | 10 | #include "ram.h"
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[f40a309] | 11 |
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| 12 | #include "dfltins.h" /* short dfltins[]; default instrument */
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[7258c6a] | 13 | #include "ptoftab.h" /* int16_t ptoftab[]; pitch to frequency table */
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[f40a309] | 14 |
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[7258c6a] | 15 | int16_t finival[NFINST] = { /* initial function values */
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[f40a309] | 16 |
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| 17 | FPUVAL(500), /* 0: Freq 1 */
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| 18 | FPUVAL(500), /* 1: Freq 2 */
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| 19 | FPUVAL(500), /* 2: Freq 3 */
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| 20 | FPUVAL(500), /* 3: Freq 4 */
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| 21 | FPUVAL(500), /* 4: Filter / Resonance */
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| 22 | FPUVAL(500), /* 5: Location */
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| 23 |
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| 24 | FPUVAL(0), /* 6: Index 1 */
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| 25 | FPUVAL(0), /* 7: Index 2 */
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| 26 | FPUVAL(0), /* 8: Index 3 */
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| 27 | FPUVAL(0), /* 9: Index 4 */
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| 28 | FPUVAL(0), /* 10: Index 5 */
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| 29 | FPUVAL(0), /* 11: Index 6 */
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| 30 |
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| 31 | FPUVAL(0) /* 12: Level */
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| 32 | };
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| 33 |
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[432327d] | 34 | uint16_t expbit[16] = { /* FPU time exponent bit expansion table */
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[f40a309] | 35 |
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| 36 | 0x0001, /* 0 */
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| 37 | 0x0002, /* 1 */
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| 38 | 0x0004, /* 2 */
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| 39 | 0x0008, /* 3 */
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| 40 | 0x0010, /* 4 */
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| 41 | 0x0020, /* 5 */
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| 42 | 0x0040, /* 6 */
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| 43 | 0x0080, /* 7 */
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| 44 | 0x0100, /* 8 */
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| 45 | 0x0200, /* 9 */
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| 46 | 0x0400, /* 10 */
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| 47 | 0x0800, /* 11 */
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| 48 | 0x1000, /* 12 */
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| 49 | 0x2000, /* 13 */
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| 50 | 0x4000, /* 14 */
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| 51 | 0x8000 /* 15 */
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| 52 | };
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| 53 |
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| 54 | /*
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| 55 | =============================================================================
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| 56 | segtime() -- determine time to a point using a new segment time
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| 57 | =============================================================================
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| 58 | */
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| 59 |
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[fa50076] | 60 | uint16_t segtime(int16_t pn, uint16_t ptime)
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[f40a309] | 61 | {
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| 62 | register struct instpnt *pp;
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[7258c6a] | 63 | register int16_t i;
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| 64 | register uint16_t tacc;
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[f40a309] | 65 |
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[0b23063] | 66 | pp = &vbufs[curvce].idhpnt[(int16_t)vbufs[curvce].idhfnc[curfunc].idfpt1];
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[f40a309] | 67 | tacc = 0;
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| 68 |
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| 69 | for (i = 0; i < pn; i++)
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| 70 | tacc += fromfpu(pp++->iptim);
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| 71 |
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| 72 | tacc += fromfpu(ptime);
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| 73 |
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| 74 | return(tacc);
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| 75 | }
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| 76 |
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| 77 | /*
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| 78 | =============================================================================
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| 79 | setseg() -- set the time to a segment
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| 80 | =============================================================================
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| 81 | */
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| 82 |
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[7258c6a] | 83 | void setseg(int16_t pn, uint16_t ptime)
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[f40a309] | 84 | {
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[7258c6a] | 85 | register int16_t i;
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| 86 | register uint16_t tacc;
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[f40a309] | 87 | register struct instpnt *pp;
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| 88 |
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[0b23063] | 89 | pp = &vbufs[curvce].idhpnt[(int16_t)vbufs[curvce].idhfnc[curfunc].idfpt1];
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[f40a309] | 90 | tacc = 0;
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| 91 |
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| 92 | for (i = 0; i < pn; i++)
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| 93 | tacc += fromfpu(pp++->iptim);
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| 94 |
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| 95 | pp->iptim = tofpu(ptime - tacc);
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| 96 | }
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| 97 |
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| 98 | /*
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| 99 | =============================================================================
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| 100 | timeto() -- find the time at a point in a function
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| 101 | =============================================================================
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| 102 | */
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| 103 |
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[fa50076] | 104 | uint16_t timeto(int16_t fn, int16_t pj)
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[f40a309] | 105 | {
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| 106 | register struct instdef *ip;
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| 107 | register struct instpnt *pt;
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[fa50076] | 108 | register int16_t pm, pn;
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| 109 | uint16_t tf;
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[f40a309] | 110 |
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| 111 | ip = &vbufs[curvce];
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| 112 | pn = ip->idhfnc[fn].idfpt1;
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| 113 | pt = &ip->idhpnt[pn];
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| 114 | pm = pn + pj;
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| 115 | tf = 0;
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| 116 |
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| 117 | while (pn LE pm) {
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| 118 |
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| 119 | tf += fromfpu(pt->iptim);
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| 120 | ++pt;
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| 121 | ++pn;
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| 122 | }
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| 123 |
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| 124 | return(tf);
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| 125 | }
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| 126 |
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| 127 | /*
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| 128 | =============================================================================
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| 129 | pntsel() -- setup editing limits for subj in the current function
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| 130 | =============================================================================
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| 131 | */
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| 132 |
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[0580615] | 133 | void pntsel(void)
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[f40a309] | 134 | {
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| 135 | register struct idfnhdr *fp;
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| 136 |
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| 137 | fp = &vbufs[curvce].idhfnc[curfunc];
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| 138 |
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| 139 | curpnt = fp->idfpt1 + subj;
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| 140 | pntptr = &vbufs[curvce].idhpnt[curpnt];
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| 141 |
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| 142 | npts = fp->idfpif;
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| 143 |
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| 144 | if (npts EQ 1) { /* detemine editing case */
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| 145 |
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| 146 | pecase = 0; /* single point */
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| 147 | temin = 1;
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| 148 | temax = 32767;
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| 149 |
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| 150 | } else if (subj EQ (npts - 1)) {
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| 151 |
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| 152 | pecase = 1; /* last point */
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| 153 | temin = timeto(curfunc, subj - 1);
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| 154 | temax = 32767;
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| 155 |
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| 156 | } else {
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| 157 |
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| 158 | pecase = 2; /* interior point */
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| 159 | temin = timeto(curfunc, subj - 1);
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| 160 | temax = timeto(curfunc, subj + 1);
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| 161 | }
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| 162 |
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| 163 | #if DEBUGPS
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| 164 | printf("pntsel(): curpnt=%d, subj=%d, fp=0x%08lx, pntptr=0x%08lx\r\n",
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| 165 | curpnt, subj, fp, pntptr);
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| 166 | printf("pntsel(): npts=%d, pecase=%d, temin=%d, temax=%d\r\n",
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| 167 | npts, pecase, temin, temax);
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| 168 | #endif
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| 169 | }
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| 170 |
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| 171 | /*
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| 172 | =============================================================================
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| 173 | vtoy() -- convert a value to a y coordinate for display
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| 174 | =============================================================================
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| 175 | */
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| 176 |
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[7258c6a] | 177 | int16_t vtoy(int16_t val, int16_t window)
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[f40a309] | 178 | {
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[7258c6a] | 179 | register int16_t yval;
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[f40a309] | 180 |
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| 181 | if (val GT 1000)
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| 182 | val = 1000;
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| 183 |
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| 184 | yval = 56 + (((1000 - val) * 14) / 100);
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| 185 |
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| 186 | if (window < 12)
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[7258c6a] | 187 | return((int16_t)(idbox[window][1] + (((yval - 56) * 100L) / 540L)));
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[f40a309] | 188 | else
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| 189 | return(yval);
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| 190 | }
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| 191 |
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| 192 | /*
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| 193 | =============================================================================
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| 194 | ttox() -- convert a time to an x coordinate for display
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| 195 | =============================================================================
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| 196 | */
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| 197 |
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[7258c6a] | 198 | int16_t ttox(uint16_t time, int16_t window)
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[f40a309] | 199 | {
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[7258c6a] | 200 | register int16_t xval;
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[f40a309] | 201 |
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| 202 | if (time < 128) /* 0..127 */
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[7258c6a] | 203 | xval = 8 + (int16_t)(((time * 1000L) / 2309L));
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[f40a309] | 204 | else if (time < 256) /* 128..255 */
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[7258c6a] | 205 | xval = 64 + (int16_t)((((time - 128) * 1000L) / 2309L));
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[f40a309] | 206 | else if (time < 512) /* 256..511 */
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[7258c6a] | 207 | xval = 120 + (int16_t)((((time - 256) * 1000L) / 4636L));
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[f40a309] | 208 | else if (time < 1024) /* 512..1023 */
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[7258c6a] | 209 | xval = 176 + (int16_t)((((time - 512) * 1000L) / 9290L));
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[f40a309] | 210 | else if (time < 2048) /* 1024..2047 */
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[7258c6a] | 211 | xval = 232 + (int16_t)((((time - 1024) * 1000L) / 18600L));
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[f40a309] | 212 | else if (time < 4096) /* 2048..4095 */
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[7258c6a] | 213 | xval = 288 + (int16_t)((((time - 2048) * 1000L) / 37218L));
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[f40a309] | 214 | else if (time < 8192) /* 4096..8191 */
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[7258c6a] | 215 | xval = 344 + (int16_t)((((time - 4096) * 1000L)/ 74454L));
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[f40a309] | 216 | else if (time < 16384) /* 8192..16383 */
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[7258c6a] | 217 | xval = 400 + (int16_t)((((time - 8192) * 1000L) / 148927L));
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| 218 | else if (time < (uint16_t)32768) /* 16384..32767 */
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| 219 | xval = 456 + (int16_t)((((time - 16384) * 1000L) / 309113L));
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[f40a309] | 220 | else
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| 221 | xval = 509;
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| 222 |
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| 223 | if (xval > 509)
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| 224 | xval = 509;
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| 225 |
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| 226 | if (window < 12)
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[7258c6a] | 227 | return((int16_t)(idbox[window][0] + (((xval - 8) * 100L) / 599L)));
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[f40a309] | 228 | else
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| 229 | return(xval);
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| 230 | }
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| 231 |
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| 232 | /*
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| 233 | =============================================================================
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| 234 | selpnt() -- select a point for editing
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| 235 | =============================================================================
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| 236 | */
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| 237 |
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[7258c6a] | 238 | int16_t selpnt(void)
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[f40a309] | 239 | {
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| 240 | register struct idfnhdr *fp;
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| 241 |
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[7258c6a] | 242 | register int16_t i, xv, np;
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[f40a309] | 243 |
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[7258c6a] | 244 | int16_t lo_x, lo_x_pt, hi_x, hi_x_pt;
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[f40a309] | 245 |
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| 246 | fp = &vbufs[curvce].idhfnc[curfunc];
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| 247 | np = fp->idfpif;
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| 248 | lo_x_pt = 0;
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| 249 | lo_x = ttox(timeto(curfunc, lo_x_pt), 12);
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| 250 | hi_x_pt = np - 1;
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| 251 | hi_x = ttox(timeto(curfunc, hi_x_pt), 12);
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| 252 |
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| 253 | for (i = 0; i < np; i++) {
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| 254 |
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| 255 | xv = ttox(timeto(curfunc, i), 12);
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| 256 |
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| 257 | if (xv LE cxval) /* largest x LE cxval */
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| 258 | if (xv GE lo_x) {
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| 259 |
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| 260 | lo_x = xv;
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| 261 | lo_x_pt = i;
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| 262 | }
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| 263 |
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| 264 | if (xv GE cxval) /* smallest x GE cxval*/
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| 265 | if (xv LT hi_x) {
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| 266 |
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| 267 | hi_x = xv;
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| 268 | hi_x_pt = i;
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| 269 | }
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| 270 | }
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| 271 |
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| 272 | if (lo_x EQ hi_x)
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| 273 | return(lo_x_pt);
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| 274 |
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| 275 | if ((cxval - lo_x) LT (hi_x - cxval))
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| 276 | return(lo_x_pt);
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| 277 | else
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| 278 | return(hi_x_pt);
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| 279 | }
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| 280 |
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| 281 | /*
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| 282 | =============================================================================
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| 283 | setinst() -- setup for editing a new instrument
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| 284 | =============================================================================
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| 285 | */
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| 286 |
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[0580615] | 287 | void setinst(void)
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[f40a309] | 288 | {
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| 289 | register struct instdef *ip;
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| 290 | register struct idfnhdr *fp;
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| 291 |
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| 292 | curfunc = 12; /* current function = 12 = level */
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| 293 | subj = 0; /* current edited point = 0 (first point) */
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| 294 | pntsv = 0; /* point selection state = unselected */
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| 295 | pecase = 0; /* point selection case = 0 (first point) */
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| 296 |
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| 297 | ip = &vbufs[curvce]; /* instrument definition pointer */
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| 298 | fp = &ip->idhfnc[curfunc]; /* function pointer */
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| 299 |
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| 300 | curpnt = subj + fp->idfpt1; /* current point in function */
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| 301 | pntptr = &ip->idhpnt[curpnt]; /* current point pointer */
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| 302 |
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| 303 | newws(); /* setup waveshape variables */
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| 304 | }
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| 305 |
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| 306 | /*
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| 307 | =============================================================================
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| 308 | newinst() -- select a new instrument
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| 309 | =============================================================================
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| 310 | */
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| 311 |
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[7258c6a] | 312 | void newinst(int16_t inst)
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[f40a309] | 313 | {
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| 314 | curinst = inst;
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| 315 | s_inst[curvce] = inst;
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| 316 | setinst();
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| 317 | }
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| 318 |
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| 319 | /*
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| 320 | =============================================================================
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| 321 | newvce() -- select a new voice
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| 322 | =============================================================================
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| 323 | */
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| 324 |
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[7258c6a] | 325 | void newvce(int16_t voice)
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[f40a309] | 326 | {
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| 327 | curvce = voice;
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| 328 | curinst = s_inst[curvce];
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| 329 | setinst();
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| 330 | }
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| 331 |
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| 332 | /*
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| 333 | =============================================================================
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| 334 | setivce() -- set instrument definition for a voice
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| 335 | =============================================================================
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| 336 | */
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| 337 |
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[7258c6a] | 338 | void setivce(int16_t voice)
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[f40a309] | 339 | {
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[7ecfb7b] | 340 | register int16_t j, k, oldi;
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[f40a309] | 341 | register struct instdef *ip;
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| 342 |
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| 343 | ip = &vbufs[voice];
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| 344 |
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| 345 | oldi = setipl(FPU_DI); /* disable FPU interrupts */
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| 346 |
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| 347 | /* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
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| 348 |
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| 349 | for (j = 0; j < NFINST; j++) { /* set funcndx[] entries */
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| 350 |
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| 351 | k = (voice << 4) + fnoff[j];
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[72741f4] | 352 | funcndx[k][0] = (int8_t *)&ip->idhfnc[j];
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| 353 | funcndx[k][1] = (int8_t *)ip->idhpnt;
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[f40a309] | 354 | }
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| 355 |
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| 356 | /* set waveshapes */
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| 357 |
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| 358 | memcpyw((io_fpu + FPU_OWST + (voice << 9) + 0x0100 + 1),
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| 359 | ip->idhwvaf, NUMWPNT);
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| 360 |
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| 361 | memcpyw((io_fpu + FPU_OWST + (voice << 9) + 1),
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| 362 | ip->idhwvbf, NUMWPNT);
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| 363 |
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| 364 | setipl(oldi); /* restore interrupts */
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| 365 |
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| 366 | /* ++++++++++++++++++++++++++ Interrupts restored +++++++++++++++++++++++++++ */
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| 367 |
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| 368 | instmod[voice] = FALSE; /* instrument matches library */
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| 369 | }
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| 370 |
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| 371 | /*
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| 372 | =============================================================================
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| 373 | modinst() -- handle instrument modifications
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| 374 | =============================================================================
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| 375 | */
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| 376 |
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[0580615] | 377 | void modinst(void)
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[f40a309] | 378 | {
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[7258c6a] | 379 | int16_t f, i, grp, oldi;
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[f40a309] | 380 |
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| 381 | if (NOT instmod[curvce]) {
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| 382 |
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| 383 | instmod[curvce] = TRUE;
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| 384 | dswin(19);
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| 385 | }
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| 386 |
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| 387 | if (NOT editsw) {
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| 388 |
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| 389 | if ((grp = vce2grp[curvce]) > 0) {
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| 390 |
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| 391 | oldi = setipl(FPU_DI); /* +++++ disable FPU interrupts */
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| 392 |
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| 393 | for (i = 0; i < 12; i++) {
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| 394 |
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| 395 | if (vce2grp[i] EQ grp) {
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| 396 |
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| 397 | memcpyw(&vbufs[i], &vbufs[curvce],
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| 398 | sizeof (struct instdef) / 2);
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| 399 |
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| 400 | for (f = 0; f < 12; f++)
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| 401 | vbufs[i].idhfnc[f].idftmd
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| 402 | &= ~I_ACTIVE;
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| 403 |
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| 404 | s_inst[i] = curinst;
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| 405 | clrvce(i);
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| 406 | setivce(i);
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| 407 | dosync(i);
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| 408 | execkey(0, 0, i, 1);
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| 409 | vce2trg[i] = -1;
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| 410 | }
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| 411 | }
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| 412 |
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| 413 | setipl(oldi); /* +++++ enable FPU interrupts */
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| 414 | }
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| 415 | }
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| 416 | }
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| 417 |
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| 418 | /*
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| 419 | =============================================================================
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| 420 | initi() -- initialize an instrument definition
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| 421 | =============================================================================
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| 422 | */
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| 423 |
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[0580615] | 424 | void initi(struct instdef *ip)
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[f40a309] | 425 | {
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[fa50076] | 426 | int16_t i, rb;
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| 427 | uint16_t mintfpu;
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[f40a309] | 428 |
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| 429 | memsetw(ip, 0, sizeof (struct instdef) / 2);
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| 430 |
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| 431 | memcpy(ip->idhname, " ", MAXIDLN+1);
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| 432 | memcpy(ip->idhcom1, " ", MAXIDLN+1);
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| 433 | memcpy(ip->idhcom2, " ", MAXIDLN+1);
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| 434 | memcpy(ip->idhcom3, " ", MAXIDLN+1);
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| 435 |
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| 436 | ip->idhplft = NIPNTS - NFINST;
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[fa50076] | 437 | ip->idhcfg = (int8_t)((initcfg >> 8) & 0x00FF);
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[f40a309] | 438 | mintfpu = tofpu(1);
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| 439 |
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| 440 | for (i = 0; i < NFINST; i++) { /* for each function ... */
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| 441 |
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| 442 | /* initialize the function header */
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| 443 |
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| 444 | rb = ((i < 4) AND (i NE 0)) ? 0 : I_NRATIO;
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| 445 | ip->idhfnc[i].idfpif = 1;
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[fa50076] | 446 | ip->idhfnc[i].idfpt1 = (int8_t)i;
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| 447 | ip->idhfnc[i].idftmd = (int8_t)((I_TM_KEY | 0x0010) | rb);
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[f40a309] | 448 |
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| 449 | /* initialize the first point in the function */
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| 450 |
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| 451 | ip->idhpnt[i].iptim = mintfpu;
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| 452 | ip->idhpnt[i].ipval = finival[i];
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| 453 | }
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| 454 |
|
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| 455 | for (i = 0; i < NUMWPNT; i++) {
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| 456 |
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[fa50076] | 457 | ip->idhwvaf[i] = (ip->idhwvao[i] = (int16_t)0x8000 ^ ((i + 1) << 8));
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| 458 | ip->idhwvbf[i] = (ip->idhwvbo[i] = (int16_t)0x8000 ^ ((i + 1) << 8));
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[f40a309] | 459 | }
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| 460 | }
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| 461 |
|
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| 462 | /*
|
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| 463 | =============================================================================
|
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| 464 | initil() -- initialize instrument library
|
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| 465 | =============================================================================
|
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| 466 | */
|
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| 467 |
|
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[0580615] | 468 | void initil(void)
|
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[f40a309] | 469 | {
|
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[7258c6a] | 470 | register int16_t i;
|
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[f40a309] | 471 |
|
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| 472 | setipl(FPU_DI); /* disable FPU interrupts */
|
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| 473 |
|
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| 474 | /* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
|
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| 475 |
|
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| 476 | fpuclr(); /* clear the FPU */
|
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| 477 |
|
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| 478 | memcpyw(&idefs[0], dfltins, sizeof (struct instdef) / 2);
|
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| 479 |
|
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| 480 | for (i = 1; i < NINST; i++) /* initialize each instrument */
|
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| 481 | initi(&idefs[i]);
|
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| 482 |
|
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| 483 | memset(funcndx, 0, sizeof funcndx);
|
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| 484 |
|
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| 485 | for (i = 0; i < 12; i++) { /* initialize voices */
|
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| 486 |
|
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| 487 | memcpyw(&vbufs[i], &idefs[0], sizeof (struct instdef) / 2);
|
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| 488 | setivce(i);
|
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| 489 | }
|
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| 490 |
|
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| 491 | setipl(FPU_EI); /* enable FPU interrupts */
|
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| 492 |
|
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| 493 | /* ++++++++++++++++++++++++++ Interrupts enabled ++++++++++++++++++++++++++++ */
|
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| 494 |
|
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| 495 | newvce(0); /* setup editing for instrument 0, voice 0 */
|
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| 496 | newinst(0);
|
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| 497 | }
|
---|
| 498 |
|
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[6262b5c] | 499 |
|
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