annotate playercode/load_far.c @ 13:32f80cd7bfee

General tidy up..
author darius
date Thu, 23 Apr 1998 07:20:19 +0000
parents 5d614bcc4287
children
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1 /*
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2
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3 Name: LOAD_FAR.C
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4
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5 Description:
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6 Farandole (FAR) 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 #include <string.h>
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17 #include "mikmod.h"
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18
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19
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20 typedef struct FARSAMPLE
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21 { CHAR samplename[32];
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22 ULONG length;
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23 UBYTE finetune;
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24 UBYTE volume;
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25 ULONG reppos;
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26 ULONG repend;
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27 UBYTE type;
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28 UBYTE loop;
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29 } FARSAMPLE;
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30
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31
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32
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33 typedef struct FARHEADER1
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34 { UBYTE id[4]; // file magic
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35 CHAR songname[40]; // songname
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36 CHAR blah[3]; // 13,10,26
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37 UWORD headerlen; // remaining length of header in bytes
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38 UBYTE version;
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39 UBYTE onoff[16];
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40 UBYTE edit1[9];
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41 UBYTE speed;
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42 UBYTE panning[16];
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43 UBYTE edit2[4];
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44 UWORD stlen;
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45 } FARHEADER1;
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46
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47
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48 typedef struct FARHEADER2
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49 { UBYTE orders[256];
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50 UBYTE numpat;
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51 UBYTE snglen;
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52 UBYTE loopto;
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53 UWORD patsiz[256];
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54 } FARHEADER2;
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55
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56
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57 typedef struct FARNOTE
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58 { UBYTE note,ins,vol,eff;
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59 } FARNOTE;
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60
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61
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62
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63 static CHAR FAR_Version[] = "Farandole";
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64 static FARHEADER1 *mh1 = NULL;
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65 static FARHEADER2 *mh2 = NULL;
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66 static FARNOTE *pat = NULL;
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67
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68
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69 BOOL FAR_Test(void)
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70 {
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71 UBYTE id[4];
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72
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73 if(!_mm_read_UBYTES(id,4,modfp)) return 0;
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74 return(!memcmp(id,"FAR=",4));
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75 }
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76
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77
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78 BOOL FAR_Init(void)
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79 {
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80 if(!(mh1 = (FARHEADER1 *)_mm_malloc(sizeof(FARHEADER1)))) return 0;
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81 if(!(mh2 = (FARHEADER2 *)_mm_malloc(sizeof(FARHEADER2)))) return 0;
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82 if(!(pat = (FARNOTE *)_mm_malloc(16*256*sizeof(FARNOTE)))) return 0;
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83
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84 return 1;
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85 }
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86
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87
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88 void FAR_Cleanup(void)
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89 {
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90 if(mh1!=NULL) free(mh1);
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91 if(mh2!=NULL) free(mh2);
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92 if(pat!=NULL) free(pat);
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93
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94 mh1 = NULL;
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95 mh2 = NULL;
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96 pat = NULL;
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97 }
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98
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99
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100 UBYTE *FAR_ConvertTrack(FARNOTE *n,int rows)
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101 {
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102 int t;
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103
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104 UniReset();
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105
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106 for(t=0; t<rows; t++)
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107 { if(n->note)
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108 { UniInstrument(n->ins);
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109 UniNote(n->note+23+12);
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110 }
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111
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112 if(n->vol&0xf) UniPTEffect(0xc,(n->vol&0xf)<<2);
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113 switch(n->eff>>4)
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114 { case 0xf:
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115 UniPTEffect(0xf,n->eff&0xf);
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116 break;
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117
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118 // others not yet implemented
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119 }
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120
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121 UniNewline();
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122 n+=16;
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123 }
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124 return UniDup();
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125 }
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126
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127
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128 BOOL FAR_Load(void)
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129 {
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130 int t,u,tracks=0;
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131 SAMPLE *q;
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132 FARSAMPLE s;
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133 FARNOTE *crow;
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134 UBYTE smap[8];
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135
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136 // try to read module header (first part)
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137 _mm_read_UBYTES(mh1->id,4,modfp);
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138 _mm_read_SBYTES(mh1->songname,40,modfp);
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139 _mm_read_SBYTES(mh1->blah,3,modfp);
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140 mh1->headerlen = _mm_read_I_UWORD (modfp);
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141 mh1->version = _mm_read_UBYTE (modfp);
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142 _mm_read_UBYTES(mh1->onoff,16,modfp);
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143 _mm_read_UBYTES(mh1->edit1,9,modfp);
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144 mh1->speed = _mm_read_UBYTE(modfp);
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145 _mm_read_UBYTES(mh1->panning,16,modfp);
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146 _mm_read_UBYTES(mh1->edit2,4,modfp);
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147 mh1->stlen = _mm_read_I_UWORD (modfp);
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148
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149
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150 // init modfile data
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151
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152 of.modtype = strdup(FAR_Version);
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153 of.songname = DupStr(mh1->songname,40);
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154 of.numchn = 16;
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155 of.initspeed = mh1->speed;
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156 of.inittempo = 99;
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157
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158 for(t=0; t<16; t++) of.panning[t] = mh1->panning[t]<<4;
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159
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160 // read songtext into comment field
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161 if(!ReadComment(mh1->stlen)) return 0;
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162
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163 // try to read module header (second part)
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164 _mm_read_UBYTES(mh2->orders,256,modfp);
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165 mh2->numpat = _mm_read_UBYTE(modfp);
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166 mh2->snglen = _mm_read_UBYTE(modfp);
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167 mh2->loopto = _mm_read_UBYTE(modfp);
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168 _mm_read_I_UWORDS(mh2->patsiz,256,modfp);
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169
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170 // of.numpat=mh2->numpat;
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171 of.numpos = mh2->snglen;
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172 if(!AllocPositions(of.numpos)) return 0;
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173 for(t=0; t<of.numpos; t++)
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174 { if(mh2->orders[t]==0xff) break;
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175 of.positions[t] = mh2->orders[t];
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176 }
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177
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178 // count number of patterns stored in file
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179 of.numpat = 0;
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180 for(t=0; t<256; t++)
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181 if(mh2->patsiz[t]) if((t+1)>of.numpat) of.numpat=t+1;
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182
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183 of.numtrk = of.numpat*of.numchn;
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184
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185 // seek across eventual new data
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186 _mm_fseek(modfp,mh1->headerlen-(869+mh1->stlen),SEEK_CUR);
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187
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188 // alloc track and pattern structures
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189 if(!AllocTracks()) return 0;
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190 if(!AllocPatterns()) return 0;
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191
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192 for(t=0; t<of.numpat; t++)
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193 { UBYTE rows=0,tempo;
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194
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195 memset(pat,0,16*256*sizeof(FARNOTE));
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196 if(mh2->patsiz[t])
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197 { rows = _mm_read_UBYTE(modfp);
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198 tempo = _mm_read_UBYTE(modfp);
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199
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200 crow = pat;
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201 for(u=mh2->patsiz[t]-2; u; u--, crow++)
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202 { crow->note = _mm_read_UBYTE(modfp);
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203 crow->ins = _mm_read_UBYTE(modfp);
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204 crow->vol = _mm_read_UBYTE(modfp);
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205 crow->eff = _mm_read_UBYTE(modfp);
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206 }
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207
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208 if(feof(modfp))
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209 { _mm_errno = MMERR_LOADING_PATTERN;
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210 return 0;
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211 }
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212
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213 of.pattrows[t] = rows+2;
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214 crow = pat;
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215 for(u=16; u; u--)
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216 if(!(of.tracks[tracks++] = FAR_ConvertTrack(crow,rows+2))) return 0;
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217 }
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218 }
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darius
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219
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220 // read sample map
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221 if(!_mm_read_UBYTES(smap,8,modfp))
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222 { _mm_errno = MMERR_LOADING_HEADER;
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223 return 0;
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224 }
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darius
parents:
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225
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darius
parents:
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226 // count number of samples used
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227 of.numins = 0;
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darius
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228 for(t=0; t<64; t++)
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darius
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229 if(smap[t>>3] & (1 << (t&7))) of.numins++;
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darius
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230 of.numsmp = of.numins;
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darius
parents:
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231
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darius
parents:
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232 // alloc sample structs
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233 if(!AllocSamples()) return 0;
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darius
parents:
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234 q = of.samples;
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235
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darius
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236 for(t=0; t<64; t++)
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darius
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237 { if(smap[t>>3] & (1 << (t&7)))
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238 { _mm_read_SBYTES(s.samplename,32,modfp);
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239 s.length = _mm_read_I_ULONG(modfp);
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240 s.finetune = _mm_read_UBYTE(modfp);
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darius
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241 s.volume = _mm_read_UBYTE(modfp);
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darius
parents:
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242 s.reppos = _mm_read_I_ULONG(modfp);
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243 s.repend = _mm_read_I_ULONG(modfp);
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darius
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244 s.type = _mm_read_UBYTE(modfp);
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darius
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245 s.loop = _mm_read_UBYTE(modfp);
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darius
parents:
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246
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darius
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247 q->samplename = DupStr(s.samplename,32);
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darius
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248 q->length = s.length;
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darius
parents:
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249 q->loopstart = s.reppos;
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darius
parents:
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250 q->loopend = s.repend;
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darius
parents:
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251 q->volume = 64;
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darius
parents:
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252 q->speed = 8363;
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darius
parents:
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253
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darius
parents:
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254 q->flags=SF_SIGNED;
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darius
parents:
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255 if(s.type&1) q->flags|=SF_16BITS;
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darius
parents:
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256 if(s.loop) q->flags|=SF_LOOP;
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darius
parents:
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257
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darius
parents:
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258 q->seekpos = _mm_ftell(modfp);
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darius
parents:
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259 _mm_fseek(modfp,q->length,SEEK_CUR);
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parents:
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260 }
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darius
parents:
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261 q++;
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darius
parents:
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262 }
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darius
parents:
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263 return 1;
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darius
parents:
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264 }
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darius
parents:
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265
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darius
parents:
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266
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darius
parents:
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267 CHAR *FAR_LoadTitle(void)
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darius
parents:
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268 {
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darius
parents:
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269 CHAR s[40];
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darius
parents:
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270
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darius
parents:
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271 _mm_fseek(modfp,4,SEEK_SET);
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darius
parents:
diff changeset
272 if(!fread(s,40,1,modfp)) return NULL;
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darius
parents:
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273
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darius
parents:
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274 return(DupStr(s,40));
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darius
parents:
diff changeset
275 }
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darius
parents:
diff changeset
276
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darius
parents:
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277
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darius
parents:
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278 MLOADER load_far =
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darius
parents:
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279 { NULL,
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darius
parents:
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280 "FAR",
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darius
parents:
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281 "Portable FAR loader v0.1",
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darius
parents:
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282 FAR_Init,
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darius
parents:
diff changeset
283 FAR_Test,
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darius
parents:
diff changeset
284 FAR_Load,
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darius
parents:
diff changeset
285 FAR_Cleanup,
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darius
parents:
diff changeset
286 FAR_LoadTitle
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darius
parents:
diff changeset
287 };
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darius
parents:
diff changeset
288