[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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[7258c6a] | 34 | int16_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 | */
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| 57 |
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| 58 | /*
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| 59 | =============================================================================
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| 60 | segtime() -- determine time to a point using a new segment time
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| 61 | =============================================================================
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| 62 | */
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[7258c6a] | 63 |
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[f40a309] | 64 | int16_t segtime(int16_t pn, uint16_t ptime)
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| 65 | {
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[7258c6a] | 66 | register struct instpnt *pp;
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| 67 | register int16_t i;
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[f40a309] | 68 | register uint16_t tacc;
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| 69 |
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| 70 | pp = &vbufs[curvce].idhpnt[vbufs[curvce].idhfnc[curfunc].idfpt1];
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| 71 | tacc = 0;
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| 72 |
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| 73 | for (i = 0; i < pn; i++)
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| 74 | tacc += fromfpu(pp++->iptim);
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| 75 |
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| 76 | tacc += fromfpu(ptime);
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| 77 |
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| 78 | return(tacc);
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| 79 | }
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| 80 |
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| 81 | /*
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| 82 | =============================================================================
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| 83 | setseg() -- set the time to a segment
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| 84 | =============================================================================
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| 85 | */
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[7258c6a] | 86 |
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[f40a309] | 87 | void setseg(int16_t pn, uint16_t ptime)
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[7258c6a] | 88 | {
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| 89 | register int16_t i;
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[f40a309] | 90 | register uint16_t tacc;
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| 91 | register struct instpnt *pp;
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| 92 |
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| 93 | pp = &vbufs[curvce].idhpnt[vbufs[curvce].idhfnc[curfunc].idfpt1];
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| 94 | tacc = 0;
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| 95 |
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| 96 | for (i = 0; i < pn; i++)
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| 97 | tacc += fromfpu(pp++->iptim);
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| 98 |
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| 99 | pp->iptim = tofpu(ptime - tacc);
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| 100 | }
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| 101 |
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| 102 | /* |
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| 103 |
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| 104 | */
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| 105 |
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| 106 | /*
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| 107 | =============================================================================
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| 108 | timeto() -- find the time at a point in a function
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| 109 | =============================================================================
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[7258c6a] | 110 | */
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[f40a309] | 111 |
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| 112 | int16_t timeto(int16_t fn, int16_t pj)
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| 113 | {
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[7258c6a] | 114 | register struct instdef *ip;
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[f40a309] | 115 | register struct instpnt *pt;
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| 116 | register int16_t tf, pm, pn;
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| 117 |
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| 118 | ip = &vbufs[curvce];
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| 119 | pn = ip->idhfnc[fn].idfpt1;
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| 120 | pt = &ip->idhpnt[pn];
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| 121 | pm = pn + pj;
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| 122 | tf = 0;
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| 123 |
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| 124 | while (pn LE pm) {
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| 125 |
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| 126 | tf += fromfpu(pt->iptim);
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| 127 | ++pt;
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| 128 | ++pn;
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| 129 | }
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| 130 |
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| 131 | return(tf);
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| 132 | }
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| 133 |
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| 134 | /* |
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| 135 |
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| 136 | */
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| 137 |
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| 138 | /*
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| 139 | =============================================================================
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| 140 | pntsel() -- setup editing limits for subj in the current function
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[0580615] | 141 | =============================================================================
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[f40a309] | 142 | */
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| 143 |
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| 144 | void pntsel(void)
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| 145 | {
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| 146 | register struct idfnhdr *fp;
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| 147 |
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| 148 | fp = &vbufs[curvce].idhfnc[curfunc];
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| 149 |
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| 150 | curpnt = fp->idfpt1 + subj;
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| 151 | pntptr = &vbufs[curvce].idhpnt[curpnt];
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| 152 |
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| 153 | npts = fp->idfpif;
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| 154 |
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| 155 | if (npts EQ 1) { /* detemine editing case */
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| 156 |
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| 157 | pecase = 0; /* single point */
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| 158 | temin = 1;
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| 159 | temax = 32767;
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| 160 |
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| 161 | } else if (subj EQ (npts - 1)) {
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| 162 |
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| 163 | pecase = 1; /* last point */
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| 164 | temin = timeto(curfunc, subj - 1);
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| 165 | temax = 32767;
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| 166 |
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| 167 | } else {
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| 168 |
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| 169 | pecase = 2; /* interior point */
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| 170 | temin = timeto(curfunc, subj - 1);
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| 171 | temax = timeto(curfunc, subj + 1);
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| 172 | }
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| 173 |
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| 174 | #if DEBUGPS
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| 175 | printf("pntsel(): curpnt=%d, subj=%d, fp=0x%08lx, pntptr=0x%08lx\r\n",
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| 176 | curpnt, subj, fp, pntptr);
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| 177 | printf("pntsel(): npts=%d, pecase=%d, temin=%d, temax=%d\r\n",
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| 178 | npts, pecase, temin, temax);
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| 179 | #endif
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| 180 | }
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| 181 |
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| 182 | /* |
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| 183 |
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| 184 | */
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| 185 |
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| 186 | /*
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| 187 | =============================================================================
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[7258c6a] | 188 | vtoy() -- convert a value to a y coordinate for display
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[f40a309] | 189 | =============================================================================
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[7258c6a] | 190 | */
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[f40a309] | 191 |
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| 192 | int16_t vtoy(int16_t val, int16_t window)
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| 193 | {
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| 194 | register int16_t yval;
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| 195 |
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| 196 | if (val GT 1000)
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| 197 | val = 1000;
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[7258c6a] | 198 |
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[f40a309] | 199 | yval = 56 + (((1000 - val) * 14) / 100);
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| 200 |
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| 201 | if (window < 12)
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| 202 | return((int16_t)(idbox[window][1] + (((yval - 56) * 100L) / 540L)));
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| 203 | else
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| 204 | return(yval);
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| 205 | }
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| 206 |
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| 207 | /* |
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| 208 |
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| 209 | */
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| 210 |
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| 211 | /*
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[7258c6a] | 212 | =============================================================================
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[f40a309] | 213 | ttox() -- convert a time to an x coordinate for display
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[7258c6a] | 214 | =============================================================================
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[f40a309] | 215 | */
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| 216 |
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[7258c6a] | 217 | int16_t ttox(uint16_t time, int16_t window)
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[f40a309] | 218 | {
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[7258c6a] | 219 | register int16_t xval;
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[f40a309] | 220 |
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[7258c6a] | 221 | if (time < 128) /* 0..127 */
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[f40a309] | 222 | xval = 8 + (int16_t)(((time * 1000L) / 2309L));
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[7258c6a] | 223 | else if (time < 256) /* 128..255 */
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[f40a309] | 224 | xval = 64 + (int16_t)((((time - 128) * 1000L) / 2309L));
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[7258c6a] | 225 | else if (time < 512) /* 256..511 */
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[f40a309] | 226 | xval = 120 + (int16_t)((((time - 256) * 1000L) / 4636L));
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[7258c6a] | 227 | else if (time < 1024) /* 512..1023 */
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[f40a309] | 228 | xval = 176 + (int16_t)((((time - 512) * 1000L) / 9290L));
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[7258c6a] | 229 | else if (time < 2048) /* 1024..2047 */
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[f40a309] | 230 | xval = 232 + (int16_t)((((time - 1024) * 1000L) / 18600L));
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[7258c6a] | 231 | else if (time < 4096) /* 2048..4095 */
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| 232 | xval = 288 + (int16_t)((((time - 2048) * 1000L) / 37218L));
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| 233 | else if (time < 8192) /* 4096..8191 */
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[f40a309] | 234 | xval = 344 + (int16_t)((((time - 4096) * 1000L)/ 74454L));
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| 235 | else if (time < 16384) /* 8192..16383 */
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| 236 | xval = 400 + (int16_t)((((time - 8192) * 1000L) / 148927L));
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| 237 | else if (time < (uint16_t)32768) /* 16384..32767 */
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| 238 | xval = 456 + (int16_t)((((time - 16384) * 1000L) / 309113L));
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| 239 | else
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| 240 | xval = 509;
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[7258c6a] | 241 |
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[f40a309] | 242 | if (xval > 509)
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| 243 | xval = 509;
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| 244 |
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| 245 | if (window < 12)
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| 246 | return((int16_t)(idbox[window][0] + (((xval - 8) * 100L) / 599L)));
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| 247 | else
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| 248 | return(xval);
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| 249 | }
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| 250 |
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| 251 | /* |
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| 252 |
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| 253 | */
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| 254 |
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[7258c6a] | 255 | /*
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[f40a309] | 256 | =============================================================================
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| 257 | selpnt() -- select a point for editing
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| 258 | =============================================================================
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[7258c6a] | 259 | */
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[f40a309] | 260 |
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[7258c6a] | 261 | int16_t selpnt(void)
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[f40a309] | 262 | {
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| 263 | register struct idfnhdr *fp;
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| 264 |
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| 265 | register int16_t i, xv, np;
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| 266 |
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| 267 | int16_t lo_x, lo_x_pt, hi_x, hi_x_pt;
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| 268 |
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| 269 | fp = &vbufs[curvce].idhfnc[curfunc];
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| 270 | np = fp->idfpif;
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| 271 | lo_x_pt = 0;
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| 272 | lo_x = ttox(timeto(curfunc, lo_x_pt), 12);
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| 273 | hi_x_pt = np - 1;
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| 274 | hi_x = ttox(timeto(curfunc, hi_x_pt), 12);
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| 275 |
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| 276 | for (i = 0; i < np; i++) {
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| 277 |
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| 278 | xv = ttox(timeto(curfunc, i), 12);
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| 279 |
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| 280 | if (xv LE cxval) /* largest x LE cxval */
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| 281 | if (xv GE lo_x) {
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| 282 |
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| 283 | lo_x = xv;
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| 284 | lo_x_pt = i;
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| 285 | }
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| 286 |
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| 287 | if (xv GE cxval) /* smallest x GE cxval*/
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| 288 | if (xv LT hi_x) {
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| 289 |
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| 290 | hi_x = xv;
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| 291 | hi_x_pt = i;
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| 292 | }
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| 293 | }
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| 294 |
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| 295 | if (lo_x EQ hi_x)
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| 296 | return(lo_x_pt);
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| 297 |
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| 298 | if ((cxval - lo_x) LT (hi_x - cxval))
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| 299 | return(lo_x_pt);
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| 300 | else
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| 301 | return(hi_x_pt);
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| 302 | }
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| 303 |
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| 304 | /* |
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| 305 |
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| 306 | */
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[0580615] | 307 |
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[f40a309] | 308 | /*
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| 309 | =============================================================================
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| 310 | setinst() -- setup for editing a new instrument
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| 311 | =============================================================================
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| 312 | */
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| 313 |
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| 314 | void setinst(void)
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| 315 | {
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| 316 | register struct instdef *ip;
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| 317 | register struct idfnhdr *fp;
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| 318 |
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| 319 | curfunc = 12; /* current function = 12 = level */
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| 320 | subj = 0; /* current edited point = 0 (first point) */
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| 321 | pntsv = 0; /* point selection state = unselected */
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| 322 | pecase = 0; /* point selection case = 0 (first point) */
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| 323 |
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| 324 | ip = &vbufs[curvce]; /* instrument definition pointer */
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| 325 | fp = &ip->idhfnc[curfunc]; /* function pointer */
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| 326 |
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| 327 | curpnt = subj + fp->idfpt1; /* current point in function */
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| 328 | pntptr = &ip->idhpnt[curpnt]; /* current point pointer */
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| 329 |
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| 330 | newws(); /* setup waveshape variables */
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| 331 | }
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| 332 |
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| 333 | /* |
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| 334 |
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[7258c6a] | 335 | */
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[f40a309] | 336 |
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| 337 | /*
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| 338 | =============================================================================
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| 339 | newinst() -- select a new instrument
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| 340 | =============================================================================
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| 341 | */
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| 342 |
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| 343 | void newinst(int16_t inst)
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| 344 | {
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| 345 | curinst = inst;
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| 346 | s_inst[curvce] = inst;
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| 347 | setinst();
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[7258c6a] | 348 | }
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[f40a309] | 349 |
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| 350 | /*
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| 351 | =============================================================================
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| 352 | newvce() -- select a new voice
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| 353 | =============================================================================
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| 354 | */
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| 355 |
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| 356 | void newvce(int16_t voice)
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| 357 | {
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| 358 | curvce = voice;
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| 359 | curinst = s_inst[curvce];
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| 360 | setinst();
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| 361 | }
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| 362 |
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| 363 | /* |
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[7258c6a] | 364 |
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[f40a309] | 365 | */
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[7258c6a] | 366 |
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[f40a309] | 367 | /*
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| 368 | =============================================================================
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| 369 | setivce() -- set instrument definition for a voice
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| 370 | =============================================================================
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| 371 | */
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| 372 |
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| 373 | void setivce(int16_t voice)
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| 374 | {
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| 375 | register int16_t i, j, k, oldi;
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| 376 | register struct instdef *ip;
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| 377 |
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| 378 | ip = &vbufs[voice];
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| 379 |
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| 380 | oldi = setipl(FPU_DI); /* disable FPU interrupts */
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| 381 |
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| 382 | /* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
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| 383 |
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| 384 | for (j = 0; j < NFINST; j++) { /* set funcndx[] entries */
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| 385 |
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| 386 | k = (voice << 4) + fnoff[j];
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| 387 | funcndx[k][0] = &ip->idhfnc[j];
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| 388 | funcndx[k][1] = ip->idhpnt;
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| 389 | }
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| 390 |
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| 391 | /* set waveshapes */
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| 392 |
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| 393 | memcpyw((io_fpu + FPU_OWST + (voice << 9) + 0x0100 + 1),
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| 394 | ip->idhwvaf, NUMWPNT);
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| 395 |
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| 396 | memcpyw((io_fpu + FPU_OWST + (voice << 9) + 1),
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| 397 | ip->idhwvbf, NUMWPNT);
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| 398 |
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| 399 | setipl(oldi); /* restore interrupts */
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| 400 |
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| 401 | /* ++++++++++++++++++++++++++ Interrupts restored +++++++++++++++++++++++++++ */
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| 402 |
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| 403 | instmod[voice] = FALSE; /* instrument matches library */
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| 404 | }
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| 405 |
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[0580615] | 406 | /* |
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[f40a309] | 407 |
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[7258c6a] | 408 | */
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[f40a309] | 409 |
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| 410 | /*
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| 411 | =============================================================================
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| 412 | modinst() -- handle instrument modifications
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| 413 | =============================================================================
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| 414 | */
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| 415 |
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| 416 | void modinst(void)
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| 417 | {
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| 418 | int16_t f, i, grp, oldi;
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| 419 |
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| 420 | if (NOT instmod[curvce]) {
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| 421 |
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| 422 | instmod[curvce] = TRUE;
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| 423 | dswin(19);
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| 424 | }
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| 425 |
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| 426 | if (NOT editsw) {
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| 427 |
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| 428 | if ((grp = vce2grp[curvce]) > 0) {
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| 429 |
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| 430 | oldi = setipl(FPU_DI); /* +++++ disable FPU interrupts */
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| 431 |
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| 432 | for (i = 0; i < 12; i++) {
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| 433 |
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| 434 | if (vce2grp[i] EQ grp) {
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| 435 |
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| 436 | memcpyw(&vbufs[i], &vbufs[curvce],
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| 437 | sizeof (struct instdef) / 2);
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| 438 |
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| 439 | for (f = 0; f < 12; f++)
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| 440 | vbufs[i].idhfnc[f].idftmd
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| 441 | &= ~I_ACTIVE;
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| 442 |
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| 443 | s_inst[i] = curinst;
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| 444 | clrvce(i);
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| 445 | setivce(i);
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| 446 | dosync(i);
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| 447 | execkey(0, 0, i, 1);
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| 448 | vce2trg[i] = -1;
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| 449 | }
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| 450 | }
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| 451 |
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| 452 | setipl(oldi); /* +++++ enable FPU interrupts */
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| 453 | }
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| 454 | }
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| 455 | }
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[0580615] | 456 |
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[f40a309] | 457 | /* |
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[7258c6a] | 458 |
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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 | initi() -- initialize an instrument definition
|
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| 464 | =============================================================================
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| 465 | */
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| 466 |
|
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| 467 | void initi(struct instdef *ip)
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| 468 | {
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| 469 | register int16_t i, mintfpu, rb;
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| 470 |
|
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| 471 | memsetw(ip, 0, sizeof (struct instdef) / 2);
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| 472 |
|
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| 473 | memcpy(ip->idhname, " ", MAXIDLN+1);
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| 474 | memcpy(ip->idhcom1, " ", MAXIDLN+1);
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| 475 | memcpy(ip->idhcom2, " ", MAXIDLN+1);
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| 476 | memcpy(ip->idhcom3, " ", MAXIDLN+1);
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| 477 |
|
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| 478 | ip->idhplft = NIPNTS - NFINST;
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| 479 | ip->idhcfg = (initcfg >> 8) & 0x00FF;
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| 480 | mintfpu = tofpu(1);
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| 481 |
|
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| 482 | for (i = 0; i < NFINST; i++) { /* for each function ... */
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| 483 |
|
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| 484 | /* initialize the function header */
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| 485 |
|
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| 486 | rb = ((i < 4) AND (i NE 0)) ? 0 : I_NRATIO;
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| 487 | ip->idhfnc[i].idfpif = 1;
|
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| 488 | ip->idhfnc[i].idfpt1 = i;
|
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| 489 | ip->idhfnc[i].idftmd = (I_TM_KEY | 0x0010) | rb;
|
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| 490 |
|
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| 491 | /* initialize the first point in the function */
|
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| 492 |
|
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| 493 | ip->idhpnt[i].iptim = mintfpu;
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| 494 | ip->idhpnt[i].ipval = finival[i];
|
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| 495 | }
|
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| 496 |
|
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| 497 | for (i = 0; i < NUMWPNT; i++) {
|
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| 498 |
|
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| 499 | ip->idhwvaf[i] = (ip->idhwvao[i] = 0x8000 ^ ((i + 1) << 8));
|
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| 500 | ip->idhwvbf[i] = (ip->idhwvbo[i] = 0x8000 ^ ((i + 1) << 8));
|
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| 501 | }
|
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[0580615] | 502 | }
|
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[f40a309] | 503 |
|
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[7258c6a] | 504 | /* |
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[f40a309] | 505 |
|
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| 506 | */
|
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| 507 |
|
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| 508 | /*
|
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| 509 | =============================================================================
|
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| 510 | initil() -- initialize instrument library
|
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| 511 | =============================================================================
|
---|
| 512 | */
|
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| 513 |
|
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| 514 | void initil(void)
|
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| 515 | {
|
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| 516 | register int16_t i;
|
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| 517 |
|
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| 518 | setipl(FPU_DI); /* disable FPU interrupts */
|
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| 519 |
|
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| 520 | /* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
|
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| 521 |
|
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| 522 | fpuclr(); /* clear the FPU */
|
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| 523 |
|
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| 524 | memcpyw(&idefs[0], dfltins, sizeof (struct instdef) / 2);
|
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| 525 |
|
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| 526 | for (i = 1; i < NINST; i++) /* initialize each instrument */
|
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| 527 | initi(&idefs[i]);
|
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| 528 |
|
---|
| 529 | memset(funcndx, 0, sizeof funcndx);
|
---|
| 530 |
|
---|
| 531 | for (i = 0; i < 12; i++) { /* initialize voices */
|
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| 532 |
|
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[6262b5c] | 533 | memcpyw(&vbufs[i], &idefs[0], sizeof (struct instdef) / 2);
|
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| 534 | setivce(i);
|
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| 535 | }
|
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| 536 |
|
---|
| 537 | setipl(FPU_EI); /* enable FPU interrupts */
|
---|
| 538 |
|
---|
| 539 | /* ++++++++++++++++++++++++++ Interrupts enabled ++++++++++++++++++++++++++++ */
|
---|
| 540 |
|
---|
| 541 | newvce(0); /* setup editing for instrument 0, voice 0 */
|
---|
| 542 | newinst(0);
|
---|
| 543 | }
|
---|
| 544 |
|
---|
| 545 |
|
---|