1 | /*
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2 | =============================================================================
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3 | scgoto.c -- position display at a given frame time
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4 | Version 48 -- 1988-09-23 -- 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 DEBUG_GO 0 /* define non-zero for sc_goto() debug */
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9 | #define CHECKPTR 0 /* define non-zero to check pointers */
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10 |
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11 | #include "all.h"
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12 |
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13 | extern void clrnl(void);
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14 | extern void clrsctl(void);
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15 | extern void dsrpmod(void);
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16 | extern void dssect(void);
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17 | extern void quiet(int16_t _1, int16_t _2);
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18 | extern void sc_adv(void);
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19 | extern void scupd(void);
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20 | extern void sdwins(void);
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21 | extern void se_disp(struct s_entry *ep, int16_t sd, struct gdsel *gdstb[], int16_t cf);
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22 | extern void sreset(void);
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23 |
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24 | /* variables defined elsewhere */
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25 |
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26 | #if DEBUG_GO
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27 | extern short verbose, testing;
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28 | #endif
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29 |
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30 | extern int16_t recsw;
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31 | extern int16_t ndisp;
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32 | extern int16_t sd;
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33 | extern int16_t swctrl;
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34 | extern int16_t swflag;
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35 |
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36 | extern struct gdsel *gdfsep;
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37 |
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38 | extern struct gdsel *gdstbc[];
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39 | extern struct gdsel *gdstbn[];
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40 |
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41 | /* |
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42 |
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43 | */
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44 |
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45 | /*
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46 | =============================================================================
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47 | sc_goto(tval) -- position score display at time 'tval'
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48 | =============================================================================
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49 | */
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50 |
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51 | int16_t sc_goto(int32_t tval)
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52 | {
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53 | register struct gdsel *gdsp;
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54 | register struct s_entry *rp;
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55 | register int32_t tf, rt;
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56 | register int16_t mod48 = 48;
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57 |
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58 | #if CHECKPTR
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59 | Pcheck(p_fwd, "p_fwd - sc_goto entry");
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60 | Pcheck(p_ctr, "p_ctr - sc_goto entry");
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61 | Pcheck(p_bak, "p_bak - sc_goto entry");
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62 | Pcheck(p_cur, "p_cur - sc_goto entry");
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63 | #endif
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64 |
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65 | /* quick check of pointers so we don't crash */
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66 |
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67 | if ((p_fwd EQ E_NULL) OR (p_cur EQ E_NULL) OR
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68 | (p_bak EQ E_NULL) OR (p_ctr EQ E_NULL))
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69 | return(FAILURE);
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70 |
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71 | if (v_regs[5] & 0x0180) /* setup for VSDD bank 0 */
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72 | vbank(0);
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73 |
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74 | sd = D_FWD; /* set display and scroll direction */
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75 | swctrl = FALSE; /* stop scroll wheel */
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76 | swflag = FALSE; /* ... */
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77 |
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78 | recsw = FALSE; /* force play mode on goto */
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79 | dsrpmod(); /* update video and LCD displays */
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80 |
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81 | if (ndisp EQ 2)
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82 | sreset(); /* reset highlighting if score is up */
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83 |
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84 | quiet(-1, -1); /* quiet the instrument */
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85 | clrnl(); /* clear note entry lists */
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86 | clrsctl(); /* clear slice control data */
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87 |
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88 | t_bak = tval - TO_BAK; /* set target time at p_bak */
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89 | t_fwd = t_bak; /* set target time at p_fwd */
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90 | t_ctr = tval; /* set target time at p_ctr */
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91 | t_cur = tval; /* set target time at p_cur */
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92 |
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93 | p_bak = frfind(t_bak, 0); /* position p_bak at t_bak */
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94 | p_cur = frfind(t_cur, 1); /* position p_cur at t_cur */
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95 | p_fwd = frfind(t_fwd, 1); /* position p_fwd at t_fwd */
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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 | /* reset the display pointers to the target time */
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101 |
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102 | if ((t_fwd LE 0) AND (p_fwd->e_type EQ EV_SCORE))
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103 | p_fwd = p_fwd->e_fwd; /* skip score header */
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104 |
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105 | rp = p_fwd; /* current forward event pointer */
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106 | rt = t_fwd; /* current forward event time */
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107 | tf = tval + TO_FWD; /* target event time */
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108 |
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109 | #if DEBUG_GO
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110 | if (verbose) {
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111 |
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112 | printf("## sc_goto(%8ld) ENTRY - tf: %8ld\n", tval, tf);
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113 |
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114 | printf(" t_bak: %8ld t_ctr: %8ld t_fwd: %8ld t_cur: %8ld\n",
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115 | t_bak, t_ctr, t_fwd, t_cur);
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116 |
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117 | printf(" p_bak: %08lX p_ctr: %08lX p_fwd: %08lX p_cur: %08lX\n",
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118 | p_bak, p_ctr, p_fwd, p_cur);
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119 | }
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120 | #endif
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121 |
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122 | /* |
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123 |
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124 | */
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125 |
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126 | while (rt++ LT tf) { /* advance p_fwd chain to tf */
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127 |
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128 | if (rp->e_type NE EV_FINI) { /* don't pass end of score */
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129 |
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130 | while (rp->e_time LE rt) { /* check event time */
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131 |
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132 | if (ndisp EQ 2) /* display event */
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133 | se_disp(rp, D_FWD, gdstbn, 0);
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134 |
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135 | rp = rp->e_fwd; /* point at next event */
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136 |
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137 | if (rp->e_type EQ EV_FINI) /* done if at end */
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138 | break;
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139 | }
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140 | }
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141 |
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142 | if (ndisp EQ 2) {
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143 |
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144 | if (0 EQ (rt % mod48)) { /* handle beat markers */
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145 |
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146 | if ((struct gdsel *)NULL NE (gdsp = gdfsep)) {
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147 |
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148 | gdfsep = gdsp->next;
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149 |
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150 | gdsp->next = gdstbn[12];
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151 | gdsp->note = 0x1111;
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152 | gdsp->code = 1;
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153 |
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154 | gdstbn[12] = gdsp;
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155 | }
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156 | }
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157 |
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158 | sc_adv(); /* scroll the display */
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159 | }
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160 | }
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161 |
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162 | p_fwd = rp; /* update p_fwd for next event */
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163 | t_fwd = tf; /* update t_fwd */
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164 |
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165 | /* |
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166 |
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167 | */
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168 | /* execute & display things at current time to start things out right */
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169 |
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170 | if (ndisp EQ 2) /* if score is up ... */
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171 | dssect(); /* display section */
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172 |
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173 | rp = p_cur; /* current event pointer */
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174 | rt = t_cur; /* current event time */
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175 |
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176 | if ((rt LE 0) AND (rp->e_type EQ EV_SCORE)) /* skip score header */
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177 | rp = rp->e_fwd;
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178 |
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179 | if (rp->e_type NE EV_FINI) { /* if we aren't at end of score */
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180 |
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181 | while (rp->e_time EQ rt) { /* do events at current time */
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182 |
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183 | se_exec(rp, D_FWD); /* execute event */
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184 |
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185 | if (ndisp EQ 2)
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186 | se_disp(rp, D_FWD, gdstbc, 1); /* update center slice */
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187 |
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188 | rp = rp->e_fwd; /* point at next event */
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189 |
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190 | if (rp->e_type EQ EV_FINI) /* done if at end */
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191 | break;
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192 | }
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193 | }
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194 |
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195 | p_cur = rp; /* update p_cur */
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196 | p_ctr = rp; /* update p_ctr */
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197 |
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198 | if (ndisp EQ 2) { /* if score is up ... */
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199 |
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200 | scupd(); /* update event display */
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201 | sdwins(); /* refresh windows */
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202 | }
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203 |
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204 | /* |
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205 |
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206 | */
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207 |
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208 | #if DEBUG_GO
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209 | if (verbose) {
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210 |
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211 | printf("## sc_goto(%8ld) EXIT\n");
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212 |
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213 | printf(" t_bak: %8ld t_ctr: %8ld t_fwd: %8ld t_cur: %8ld\n",
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214 | t_bak, t_ctr, t_fwd, t_cur);
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215 |
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216 | printf(" p_bak: %08lx p_ctr: %08lx p_fwd: %08lx p_cur: %08lx\n",
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217 | p_bak, p_ctr, p_fwd, p_cur);
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218 | }
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219 | #endif
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220 |
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221 | #if CHECKPTR
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222 | Pcheck(p_fwd, "p_fwd - sc_goto exiting");
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223 | Pcheck(p_ctr, "p_ctr - sc_goto exiting");
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224 | Pcheck(p_bak, "p_bak - sc_goto exiting");
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225 | Pcheck(p_cur, "p_cur - sc_goto exiting");
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226 | #endif
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227 |
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228 | return(SUCCESS);
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229 | }
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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 |
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235 | /*
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236 | =============================================================================
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237 | sc_refr() -- refresh the display to a particular time
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238 | =============================================================================
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239 | */
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240 |
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241 | int16_t sc_refr(int32_t t)
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242 | {
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243 | int16_t oldrs, rc;
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244 |
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245 | oldrs = recsw; /* save recsw */
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246 | rc = sc_goto(t); /* refresh the display via a goto */
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247 | recsw = oldrs; /* restore recsw */
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248 | dsrpmod(); /* update display of recsw */
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249 | return(rc); /* return status from sc_goto */
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250 | }
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251 |
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