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1 /*
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2
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3 Name: LOAD_669.C
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4
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5 Description:
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6 Tran's 669 module loader
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7
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8 Portability:
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9 All systems - all compilers (hopefully)
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10
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11 If this module is found to not be portable to any particular platform,
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12 please contact Jake Stine at dracoirs@epix.net (see MIKMOD.TXT for
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13 more information on contacting the author).
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14
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15 */
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16
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17 #include <string.h>
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18 #include "mikmod.h"
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19
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20
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21 // Raw 669 header struct:
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22
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23 typedef struct S69HEADER
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24 { UBYTE marker[2];
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25 CHAR message[108];
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26 UBYTE nos;
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27 UBYTE nop;
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28 UBYTE looporder;
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29 UBYTE orders[0x80];
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30 UBYTE tempos[0x80];
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31 UBYTE breaks[0x80];
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32 } S69HEADER;
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33
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34
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35 // Raw 669 sampleinfo struct:
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36
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37 typedef struct S69SAMPLE
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38 { CHAR filename[13];
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39 SLONG length;
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40 SLONG loopbeg;
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41 SLONG loopend;
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42 } S69SAMPLE;
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43
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44
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45 // Raw 669 Note struct
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46
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47 typedef struct S69NOTE
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48 { UBYTE a,b,c;
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49 } S69NOTE;
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50
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51
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52 static S69NOTE *s69pat = NULL;
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53 static S69HEADER *mh = NULL;
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54
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55 static CHAR *S69_Version[] =
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56 { "669",
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57 "Extended 669"
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58 };
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59
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60
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61 BOOL S69_Test(void)
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62 {
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63 UBYTE id[2];
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64
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65 if(!_mm_read_UBYTES(id,2,modfp)) return 0;
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66 if(!memcmp(id,"if",2) || !memcmp(id,"JN",2))
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67 { _mm_fseek(modfp,108,SEEK_CUR);
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68 if(_mm_read_UBYTE(modfp) > 64) return 0;
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69 if(_mm_read_UBYTE(modfp) > 128) return 0;
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70 if(_mm_read_UBYTE(modfp) > 120) return 0;
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71 return 1;
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72 }
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73 return 0;
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74 }
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75
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76
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77 BOOL S69_Init(void)
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78 {
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79 if(!(s69pat=(S69NOTE *)_mm_malloc(64*8*sizeof(S69NOTE)))) return 0;
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80 if(!(mh=(S69HEADER *)_mm_calloc(1,sizeof(S69HEADER)))) return 0;
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81 return 1;
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82 }
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83
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84
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85 void S69_Cleanup(void)
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86 {
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87 if(s69pat!=NULL) free(s69pat);
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88 if(mh!=NULL) free(mh);
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89
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90 mh = NULL;
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91 s69pat = NULL;
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92 }
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93
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94
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95 BOOL S69_LoadPatterns(void)
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96 {
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97 int t,s,q,tracks=0,t2,t3;
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98 UBYTE note,inst,vol,a,b,c, lo;
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99 S69NOTE *cur;
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100
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101 if(!AllocPatterns()) return 0;
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102 if(!AllocTracks()) return 0;
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103
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104 for(t=0; t<of.numpat; t++)
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105 { of.pattrows[t] = mh->breaks[t]+1;
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106
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107 // Load the pattern into the temp buffer
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108 // and convert it into the 3-byte format
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109
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110 cur = s69pat;
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111 for(t2=64; t2; t2--)
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112 { for(t3=8; t3; t3--, cur++)
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113 { cur->a = _mm_read_UBYTE(modfp);
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114 cur->b = _mm_read_UBYTE(modfp);
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115 cur->c = _mm_read_UBYTE(modfp);
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116 }
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117 }
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118
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119 if(feof(modfp))
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120 { _mm_errno = MMERR_LOADING_PATTERN;
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121 return 0;
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122 }
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123
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124 for(s=0; s<8; s++)
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125 { UniReset();
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126 UniPTEffect(0xf,75); // was 78
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127 UniPTEffect(0xf,3);
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128
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129 for(q=0; q<64; q++)
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130 { a = s69pat[(q*8)+s].a;
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131 b = s69pat[(q*8)+s].b;
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132 c = s69pat[(q*8)+s].c;
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133
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134 note = a >> 2;
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135 inst = ((a & 0x3) << 4) | ((b & 0xf0) >> 4);
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136 vol = b & 0xf;
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137
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138 if(note < 0x3e)
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139 { UniInstrument(inst);
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140 UniNote(note+24);
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141 }
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142
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143 if(note < 0x3f) UniPTEffect(0xc,vol<<2);
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144
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145 lo = c & 0xf;
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146 switch(c >> 4)
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147 { case 0:
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148 UniPTEffect(0x1,lo);
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149 break;
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150
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151 case 1:
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152 UniPTEffect(0x2,lo);
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153 break;
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154
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155 case 2:
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156 UniPTEffect(0x3,lo);
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157 break;
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158
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159 case 4:
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160 UniPTEffect(0x4,lo);
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161 break;
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162 }
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163 UniNewline();
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164 }
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165 if(!(of.tracks[tracks++]=UniDup())) return 0;
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166 }
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167 }
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168 return 1;
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169 }
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170
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171
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172 BOOL S69_Load(void)
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173 {
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174 int t;
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175 S69SAMPLE s;
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176 SAMPLE *q;
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177
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178 // try to read module header
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179
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180 _mm_read_UBYTES(mh->marker,2,modfp);
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181 _mm_read_UBYTES((UBYTE *)mh->message,108,modfp);
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182 mh->nos = _mm_read_UBYTE(modfp);
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183 mh->nop = _mm_read_UBYTE(modfp);
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184 mh->looporder = _mm_read_UBYTE(modfp);
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185 _mm_read_UBYTES(mh->orders,0x80,modfp);
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186 _mm_read_UBYTES(mh->tempos,0x80,modfp);
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187 _mm_read_UBYTES(mh->breaks,0x80,modfp);
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188
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189 // set module variables
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190
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191 of.initspeed = 6;
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192 of.inittempo = 125;
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193 of.songname = DupStr(mh->message,108);
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194 of.modtype = strdup(S69_Version[memcmp(mh->marker,"JN",2)==0]);
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195 of.numchn = 8;
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196 of.numpat = mh->nop;
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197 of.numins = of.numsmp = mh->nos;
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198 of.numtrk = of.numchn*of.numpat;
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199 of.flags = UF_XMPERIODS; // | UF_LINEAR;
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200
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201 if(!AllocPositions(0x80)) return 0;
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202 for(t=0; t<0x80; t++)
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203 { if(mh->orders[t]==0xff) break;
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204 of.positions[t] = mh->orders[t];
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205 }
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206
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207 of.numpos = t;
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208
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209 if(!AllocSamples()) return 0;
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210 q = of.samples;
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211
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212 for(t=0; t<of.numins; t++)
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213 { // try to read sample info
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214
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215 _mm_read_UBYTES((UBYTE *)s.filename,13,modfp);
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216 s.length = _mm_read_I_SLONG(modfp);
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217 s.loopbeg = _mm_read_I_SLONG(modfp);
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218 s.loopend = _mm_read_I_SLONG(modfp);
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219
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220 if((s.length < 0) || (s.loopbeg < -1) || (s.loopend < -1))
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221 { _mm_errno = MMERR_LOADING_HEADER;
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222 return 0;
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223 }
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224
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225 q->samplename = DupStr(s.filename,13);
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226
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227 q->seekpos = 0;
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228 q->speed = 0;
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229 q->length = s.length;
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230 q->loopstart = s.loopbeg;
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231 q->loopend = (s.loopend<s.length) ? s.loopend : s.length;
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232 q->flags = (s.loopbeg<s.loopend) ? SF_LOOP : 0;
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233 q->volume = 64;
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234
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235 q++;
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236 }
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237
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238 if(!S69_LoadPatterns()) return 0;
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239
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240 return 1;
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241 }
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242
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243
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244 MLOADER load_669 =
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245 { NULL,
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246 "669",
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247 "Portable 669 loader v0.1",
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248 S69_Init,
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249 S69_Test,
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250 S69_Load,
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251 S69_Cleanup,
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252 NULL
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253 };
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254
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255
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