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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10 | #include "stddefs.h"
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11 | #include "fpu.h"
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12 | #include "hwdefs.h"
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13 | #include "vsdd.h"
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14 | #include "graphdef.h"
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15 |
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16 | #include "midas.h"
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17 | #include "instdsp.h"
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18 |
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19 | extern unsigned setipl(unsigned arg);
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20 |
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21 | extern unsigned tofpu(unsigned time);
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22 | extern unsigned fromfpu(unsigned fputime);
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23 |
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24 | extern short s_inst[], vce2trg[], vce2grp[];
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25 |
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26 | extern short curfunc; /* current function number */
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27 | extern short curinst; /* current instrument number */
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28 | extern short curpnt; /* current point number (absolute) */
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29 | extern short curvce; /* current voice number */
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30 | extern short cxval; /* graphics cursor x value */
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31 | extern short editsw; /* edit mode switch */
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32 | extern short initcfg; /* initialization cfg value */
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33 | extern short npts; /* number of points in function */
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34 | extern short pecase; /* point edit case variable */
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35 | extern short pntsv; /* point selection state variable */
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36 | extern short subj; /* edited point number (relative) */
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37 | extern short temax; /* time upper limit */
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38 | extern short temin; /* time lower limit */
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39 |
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40 | extern char *funcndx[256][2]; /* function header pointers */
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41 |
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42 | extern short idbox[][8]; /* display box parameters */
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43 | extern short instmod[12]; /* intrument data modified */
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44 |
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45 | extern short fnoff[]; /* instrument fn to FPU fn table */
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46 |
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47 | extern struct instpnt *pntptr; /* pointer to edited point */
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48 |
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49 | extern struct instdef idefs[NINST]; /* current instrument definitions */
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50 | extern struct instdef vbufs[12]; /* voice instrument buffers */
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51 |
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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 | #include "dfltins.h" /* short dfltins[]; default instrument */
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57 | #include "ptoftab.h" /* short ptoftab[]; pitch to frequency table */
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58 |
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59 | short finival[NFINST] = { /* initial function values */
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60 |
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61 | FPUVAL(500), /* 0: Freq 1 */
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62 | FPUVAL(500), /* 1: Freq 2 */
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63 | FPUVAL(500), /* 2: Freq 3 */
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64 | FPUVAL(500), /* 3: Freq 4 */
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65 | FPUVAL(500), /* 4: Filter / Resonance */
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66 | FPUVAL(500), /* 5: Location */
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67 |
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68 | FPUVAL(0), /* 6: Index 1 */
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69 | FPUVAL(0), /* 7: Index 2 */
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70 | FPUVAL(0), /* 8: Index 3 */
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71 | FPUVAL(0), /* 9: Index 4 */
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72 | FPUVAL(0), /* 10: Index 5 */
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73 | FPUVAL(0), /* 11: Index 6 */
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74 |
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75 | FPUVAL(0) /* 12: Level */
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76 | };
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77 |
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78 | short expbit[16] = { /* FPU time exponent bit expansion table */
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79 |
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80 | 0x0001, /* 0 */
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81 | 0x0002, /* 1 */
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82 | 0x0004, /* 2 */
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83 | 0x0008, /* 3 */
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84 | 0x0010, /* 4 */
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85 | 0x0020, /* 5 */
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86 | 0x0040, /* 6 */
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87 | 0x0080, /* 7 */
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88 | 0x0100, /* 8 */
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89 | 0x0200, /* 9 */
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90 | 0x0400, /* 10 */
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91 | 0x0800, /* 11 */
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92 | 0x1000, /* 12 */
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93 | 0x2000, /* 13 */
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94 | 0x4000, /* 14 */
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95 | 0x8000 /* 15 */
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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 | */
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101 |
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102 | /*
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103 | =============================================================================
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104 | segtime() -- determine time to a point using a new segment time
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105 | =============================================================================
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106 | */
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107 |
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108 | short segtime(short pn, unsigned ptime)
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109 | {
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110 | register struct instpnt *pp;
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111 | register short i;
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112 | register unsigned tacc;
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113 |
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114 | pp = &vbufs[curvce].idhpnt[vbufs[curvce].idhfnc[curfunc].idfpt1];
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115 | tacc = 0;
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116 |
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117 | for (i = 0; i < pn; i++)
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118 | tacc += fromfpu(pp++->iptim);
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119 |
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120 | tacc += fromfpu(ptime);
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121 |
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122 | return(tacc);
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123 | }
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124 |
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125 | /*
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126 | =============================================================================
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127 | setseg() -- set the time to a segment
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128 | =============================================================================
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129 | */
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130 |
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131 | void setseg(short pn, unsigned ptime)
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132 | {
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133 | register short i;
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134 | register unsigned tacc;
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135 | register struct instpnt *pp;
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136 |
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137 | pp = &vbufs[curvce].idhpnt[vbufs[curvce].idhfnc[curfunc].idfpt1];
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138 | tacc = 0;
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139 |
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140 | for (i = 0; i < pn; i++)
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141 | tacc += fromfpu(pp++->iptim);
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142 |
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143 | pp->iptim = tofpu(ptime - tacc);
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144 | }
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145 |
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146 | /* |
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147 |
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148 | */
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149 |
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150 | /*
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151 | =============================================================================
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152 | timeto() -- find the time at a point in a function
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153 | =============================================================================
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154 | */
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155 |
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156 | short timeto(short fn, short pj)
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157 | {
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158 | register struct instdef *ip;
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159 | register struct instpnt *pt;
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160 | register short tf, pm, pn;
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161 |
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162 | ip = &vbufs[curvce];
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163 | pn = ip->idhfnc[fn].idfpt1;
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164 | pt = &ip->idhpnt[pn];
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165 | pm = pn + pj;
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166 | tf = 0;
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167 |
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168 | while (pn LE pm) {
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169 |
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170 | tf += fromfpu(pt->iptim);
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171 | ++pt;
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172 | ++pn;
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173 | }
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174 |
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175 | return(tf);
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176 | }
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177 |
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178 | /* |
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179 |
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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 | pntsel() -- setup editing limits for subj in the current function
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185 | =============================================================================
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186 | */
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187 |
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188 | void pntsel(void)
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189 | {
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190 | register struct idfnhdr *fp;
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191 |
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192 | fp = &vbufs[curvce].idhfnc[curfunc];
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193 |
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194 | curpnt = fp->idfpt1 + subj;
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195 | pntptr = &vbufs[curvce].idhpnt[curpnt];
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196 |
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197 | npts = fp->idfpif;
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198 |
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199 | if (npts EQ 1) { /* detemine editing case */
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200 |
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201 | pecase = 0; /* single point */
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202 | temin = 1;
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203 | temax = 32767;
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204 |
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205 | } else if (subj EQ (npts - 1)) {
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206 |
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207 | pecase = 1; /* last point */
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208 | temin = timeto(curfunc, subj - 1);
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209 | temax = 32767;
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210 |
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211 | } else {
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212 |
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213 | pecase = 2; /* interior point */
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214 | temin = timeto(curfunc, subj - 1);
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215 | temax = timeto(curfunc, subj + 1);
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216 | }
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217 |
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218 | #if DEBUGPS
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219 | printf("pntsel(): curpnt=%d, subj=%d, fp=0x%08lx, pntptr=0x%08lx\r\n",
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220 | curpnt, subj, fp, pntptr);
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221 | printf("pntsel(): npts=%d, pecase=%d, temin=%d, temax=%d\r\n",
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222 | npts, pecase, temin, temax);
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223 | #endif
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224 | }
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225 |
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226 | /* |
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227 |
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228 | */
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229 |
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230 | /*
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231 | =============================================================================
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232 | vtoy() -- convert a value to a y coordinate for display
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233 | =============================================================================
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234 | */
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235 |
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236 | short vtoy(short val, short window)
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237 | {
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238 | register short yval;
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239 |
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240 | if (val GT 1000)
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241 | val = 1000;
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242 |
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243 | yval = 56 + (((1000 - val) * 14) / 100);
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244 |
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245 | if (window < 12)
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246 | return((short)(idbox[window][1] + (((yval - 56) * 100L) / 540L)));
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247 | else
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248 | return(yval);
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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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255 | /*
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256 | =============================================================================
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257 | ttox() -- convert a time to an x coordinate for display
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258 | =============================================================================
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259 | */
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260 |
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261 | short ttox(unsigned time, short window)
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262 | {
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263 | register short xval;
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264 |
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265 | if (time < 128) /* 0..127 */
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266 | xval = 8 + (short)(((time * 1000L) / 2309L));
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267 | else if (time < 256) /* 128..255 */
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268 | xval = 64 + (short)((((time - 128) * 1000L) / 2309L));
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269 | else if (time < 512) /* 256..511 */
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270 | xval = 120 + (short)((((time - 256) * 1000L) / 4636L));
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271 | else if (time < 1024) /* 512..1023 */
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272 | xval = 176 + (short)((((time - 512) * 1000L) / 9290L));
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273 | else if (time < 2048) /* 1024..2047 */
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274 | xval = 232 + (short)((((time - 1024) * 1000L) / 18600L));
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275 | else if (time < 4096) /* 2048..4095 */
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276 | xval = 288 + (short)((((time - 2048) * 1000L) / 37218L));
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277 | else if (time < 8192) /* 4096..8191 */
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278 | xval = 344 + (short)((((time - 4096) * 1000L)/ 74454L));
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279 | else if (time < 16384) /* 8192..16383 */
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280 | xval = 400 + (short)((((time - 8192) * 1000L) / 148927L));
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281 | else if (time < (unsigned)32768) /* 16384..32767 */
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282 | xval = 456 + (short)((((time - 16384) * 1000L) / 309113L));
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283 | else
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284 | xval = 509;
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285 |
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286 | if (xval > 509)
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287 | xval = 509;
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288 |
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289 | if (window < 12)
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290 | return((short)(idbox[window][0] + (((xval - 8) * 100L) / 599L)));
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291 | else
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292 | return(xval);
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293 | }
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294 |
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295 | /* |
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296 |
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297 | */
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298 |
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299 | /*
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300 | =============================================================================
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301 | selpnt() -- select a point for editing
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302 | =============================================================================
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303 | */
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304 |
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305 | short selpnt(void)
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306 | {
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307 | register struct idfnhdr *fp;
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308 |
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309 | register short i, xv, np;
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310 |
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311 | short lo_x, lo_x_pt, hi_x, hi_x_pt;
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312 |
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313 | fp = &vbufs[curvce].idhfnc[curfunc];
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314 | np = fp->idfpif;
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315 | lo_x_pt = 0;
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316 | lo_x = ttox(timeto(curfunc, lo_x_pt), 12);
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317 | hi_x_pt = np - 1;
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318 | hi_x = ttox(timeto(curfunc, hi_x_pt), 12);
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319 |
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320 | for (i = 0; i < np; i++) {
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321 |
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322 | xv = ttox(timeto(curfunc, i), 12);
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323 |
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324 | if (xv LE cxval) /* largest x LE cxval */
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325 | if (xv GE lo_x) {
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326 |
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327 | lo_x = xv;
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328 | lo_x_pt = i;
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329 | }
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330 |
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331 | if (xv GE cxval) /* smallest x GE cxval*/
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332 | if (xv LT hi_x) {
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333 |
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334 | hi_x = xv;
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335 | hi_x_pt = i;
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336 | }
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337 | }
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338 |
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339 | if (lo_x EQ hi_x)
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340 | return(lo_x_pt);
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341 |
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342 | if ((cxval - lo_x) LT (hi_x - cxval))
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343 | return(lo_x_pt);
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344 | else
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345 | return(hi_x_pt);
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346 | }
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347 |
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348 | /* |
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349 |
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350 | */
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351 |
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352 | /*
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353 | =============================================================================
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354 | setinst() -- setup for editing a new instrument
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355 | =============================================================================
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356 | */
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357 |
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358 | void setinst(void)
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359 | {
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360 | register struct instdef *ip;
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361 | register struct idfnhdr *fp;
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362 |
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363 | curfunc = 12; /* current function = 12 = level */
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364 | subj = 0; /* current edited point = 0 (first point) */
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365 | pntsv = 0; /* point selection state = unselected */
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366 | pecase = 0; /* point selection case = 0 (first point) */
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367 |
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368 | ip = &vbufs[curvce]; /* instrument definition pointer */
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369 | fp = &ip->idhfnc[curfunc]; /* function pointer */
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370 |
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371 | curpnt = subj + fp->idfpt1; /* current point in function */
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372 | pntptr = &ip->idhpnt[curpnt]; /* current point pointer */
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373 |
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374 | newws(); /* setup waveshape variables */
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375 | }
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376 |
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377 | /* |
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378 |
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379 | */
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380 |
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381 | /*
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382 | =============================================================================
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383 | newinst() -- select a new instrument
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384 | =============================================================================
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385 | */
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386 |
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387 | void newinst(short inst)
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388 | {
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389 | curinst = inst;
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390 | s_inst[curvce] = inst;
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391 | setinst();
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392 | }
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393 |
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394 | /*
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395 | =============================================================================
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396 | newvce() -- select a new voice
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397 | =============================================================================
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398 | */
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399 |
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400 | void newvce(short voice)
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401 | {
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402 | curvce = voice;
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403 | curinst = s_inst[curvce];
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404 | setinst();
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405 | }
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406 |
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407 | /* |
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408 |
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409 | */
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410 |
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411 | /*
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412 | =============================================================================
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413 | setivce() -- set instrument definition for a voice
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414 | =============================================================================
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415 | */
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416 |
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417 | void setivce(short voice)
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418 | {
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419 | register short i, j, k, oldi;
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420 | register struct instdef *ip;
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421 |
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422 | ip = &vbufs[voice];
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423 |
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424 | oldi = setipl(FPU_DI); /* disable FPU interrupts */
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425 |
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426 | /* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
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427 |
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428 | for (j = 0; j < NFINST; j++) { /* set funcndx[] entries */
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429 |
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430 | k = (voice << 4) + fnoff[j];
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431 | funcndx[k][0] = &ip->idhfnc[j];
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432 | funcndx[k][1] = ip->idhpnt;
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433 | }
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434 |
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435 | /* set waveshapes */
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436 |
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437 | memcpyw((io_fpu + FPU_OWST + (voice << 9) + 0x0100 + 1),
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438 | ip->idhwvaf, NUMWPNT);
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439 |
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440 | memcpyw((io_fpu + FPU_OWST + (voice << 9) + 1),
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441 | ip->idhwvbf, NUMWPNT);
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442 |
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443 | setipl(oldi); /* restore interrupts */
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444 |
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445 | /* ++++++++++++++++++++++++++ Interrupts restored +++++++++++++++++++++++++++ */
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446 |
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447 | instmod[voice] = FALSE; /* instrument matches library */
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448 | }
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449 |
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450 | /* |
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451 |
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452 | */
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453 |
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454 | /*
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455 | =============================================================================
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456 | modinst() -- handle instrument modifications
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457 | =============================================================================
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458 | */
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459 |
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460 | void modinst(void)
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461 | {
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462 | short f, i, grp, oldi;
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463 |
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464 | if (NOT instmod[curvce]) {
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465 |
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466 | instmod[curvce] = TRUE;
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467 | dswin(19);
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468 | }
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469 |
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470 | if (NOT editsw) {
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471 |
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472 | if ((grp = vce2grp[curvce]) > 0) {
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473 |
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474 | oldi = setipl(FPU_DI); /* +++++ disable FPU interrupts */
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475 |
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476 | for (i = 0; i < 12; i++) {
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477 |
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478 | if (vce2grp[i] EQ grp) {
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479 |
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480 | memcpyw(&vbufs[i], &vbufs[curvce],
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481 | sizeof (struct instdef) / 2);
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482 |
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483 | for (f = 0; f < 12; f++)
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484 | vbufs[i].idhfnc[f].idftmd
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485 | &= ~I_ACTIVE;
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486 |
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487 | s_inst[i] = curinst;
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488 | clrvce(i);
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489 | setivce(i);
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490 | dosync(i);
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491 | execkey(0, 0, i, 1);
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492 | vce2trg[i] = -1;
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493 | }
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494 | }
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495 |
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496 | setipl(oldi); /* +++++ enable FPU interrupts */
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497 | }
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498 | }
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499 | }
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500 |
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501 | /* |
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502 |
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503 | */
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504 |
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505 | /*
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506 | =============================================================================
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507 | initi() -- initialize an instrument definition
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508 | =============================================================================
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509 | */
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510 |
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511 | void initi(struct instdef *ip)
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512 | {
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513 | register short i, mintfpu, rb;
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514 |
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515 | memsetw(ip, 0, sizeof (struct instdef) / 2);
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516 |
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517 | memcpy(ip->idhname, " ", MAXIDLN+1);
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518 | memcpy(ip->idhcom1, " ", MAXIDLN+1);
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519 | memcpy(ip->idhcom2, " ", MAXIDLN+1);
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520 | memcpy(ip->idhcom3, " ", MAXIDLN+1);
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521 |
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522 | ip->idhplft = NIPNTS - NFINST;
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523 | ip->idhcfg = (initcfg >> 8) & 0x00FF;
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524 | mintfpu = tofpu(1);
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525 |
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526 | for (i = 0; i < NFINST; i++) { /* for each function ... */
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527 |
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528 | /* initialize the function header */
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529 |
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530 | rb = ((i < 4) AND (i NE 0)) ? 0 : I_NRATIO;
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531 | ip->idhfnc[i].idfpif = 1;
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532 | ip->idhfnc[i].idfpt1 = i;
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533 | ip->idhfnc[i].idftmd = (I_TM_KEY | 0x0010) | rb;
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534 |
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535 | /* initialize the first point in the function */
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536 |
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537 | ip->idhpnt[i].iptim = mintfpu;
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538 | ip->idhpnt[i].ipval = finival[i];
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539 | }
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540 |
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541 | for (i = 0; i < NUMWPNT; i++) {
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542 |
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543 | ip->idhwvaf[i] = (ip->idhwvao[i] = 0x8000 ^ ((i + 1) << 8));
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544 | ip->idhwvbf[i] = (ip->idhwvbo[i] = 0x8000 ^ ((i + 1) << 8));
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545 | }
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546 | }
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547 |
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548 | /* |
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549 |
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550 | */
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551 |
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552 | /*
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553 | =============================================================================
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554 | initil() -- initialize instrument library
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555 | =============================================================================
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556 | */
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557 |
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558 | void initil(void)
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559 | {
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560 | register short i;
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561 |
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562 | setipl(FPU_DI); /* disable FPU interrupts */
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563 |
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564 | /* +++++++++++++++++++++++ FPU interrupts disabled ++++++++++++++++++++++++++ */
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565 |
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566 | fpuclr(); /* clear the FPU */
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567 |
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568 | memcpyw(&idefs[0], dfltins, sizeof (struct instdef) / 2);
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569 |
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570 | for (i = 1; i < NINST; i++) /* initialize each instrument */
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571 | initi(&idefs[i]);
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572 |
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573 | memset(funcndx, 0, sizeof funcndx);
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574 |
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575 | for (i = 0; i < 12; i++) { /* initialize voices */
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576 |
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577 | memcpyw(&vbufs[i], &idefs[0], sizeof (struct instdef) / 2);
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578 | setivce(i);
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579 | }
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580 |
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581 | setipl(FPU_EI); /* enable FPU interrupts */
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582 |
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583 | /* ++++++++++++++++++++++++++ Interrupts enabled ++++++++++++++++++++++++++++ */
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584 |
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585 | newvce(0); /* setup editing for instrument 0, voice 0 */
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586 | newinst(0);
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587 | }
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588 |
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