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1 /*
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2 * miniJSS - Module structure and handling routines
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2006-2007 Tecnic Software productions (TNSP)
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5 */
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6 #include "jssmod.h"
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7 #include <string.h>
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8
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9
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10 #ifndef JSS_LIGHT
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11 /* Take given data until maxlen reached, make a string
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12 */
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13 char *jssASCIItoStr(char * sdata, const char endByte, const size_t maxLen)
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14 {
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15 size_t i, k;
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16 char *res;
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17
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18 for (i = 0; sdata[i] && i < maxLen; i++);
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19
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20 res = (char *) dmMalloc(i + 1);
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21 if (res == NULL)
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22 return NULL;
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23
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24 for (k = 0; sdata[k] != endByte && k < i; k++)
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25 res[k] = sdata[k];
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26
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27 res[k] = 0;
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28
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29 return res;
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30 }
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31
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32
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33 /* Encodes a given 8-bit sample
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34 */
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43
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35 BOOL jssEncodeSample8(Uint8 * data, const size_t len, const int ops)
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0
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36 {
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43
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37 size_t count = len;
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0
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38 Sint8 t, value = 0;
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39
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43
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40 while (count--)
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0
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41 {
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43
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42 t = *data;
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0
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43
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44 if (ops & jsampFlipSign)
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45 t ^= 0x80;
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46
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47 if (ops & jsampDelta)
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48 {
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49 int n = t - value;
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50 value = t;
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51 t = n;
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52 }
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53
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43
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54 *(data++) = t;
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0
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55 }
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56
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57 return TRUE;
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58 }
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59
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60
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61 /* Decodes a given 16-bit sample
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62 */
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43
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63 BOOL jssEncodeSample16(Uint16 * data, const size_t len, const int ops)
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0
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64 {
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65 // "Split" the 16-bit samples into 8-bit halves
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66 if (ops & jsampSplit)
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67 {
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68 // Allocate temporary processing buffer
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43
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69 size_t count, bufSize = len * sizeof(Sint16);
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0
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70 Uint8 *bp1, *bp2;
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43
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71 Sint16 *sdata, *tmpBuf = dmMalloc(bufSize);
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0
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72 if (tmpBuf == NULL) return FALSE;
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73
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74 sdata = tmpBuf;
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43
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75 bp1 = (Uint8 *) data;
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76 bp2 = bp1 + len;
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77 count = len;
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0
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78
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43
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79 while (count--)
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0
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80 {
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43
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81 Sint16 t = (*sdata++);
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0
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82 *bp1++ = t >> 8;
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83 *bp2++ = t & 0xff;
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84 }
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85
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43
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86 memcpy(data, tmpBuf, bufSize);
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0
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87 dmFree(tmpBuf);
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88
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43
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89 return jssEncodeSample8((Uint8 *) data, bufSize, ops);
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0
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90 }
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91 else
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92 {
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43
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93 Sint16 t, p, value = 0, *sdata = (Sint16 *) data;
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94 size_t count = len;
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0
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95
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43
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96 while (count--)
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0
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97 {
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98 if (ops & jsampSwapEndianess)
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99 {
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100 p = *sdata;
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101 t = ((p >> 8) & 0xff) | ((p & 0xff) << 8);
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102 } else
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103 t = *sdata;
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104
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105 if (ops & jsampDelta)
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106 {
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107 int n = t - value;
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108 value = t;
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109 t = n;
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110 }
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111
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112 if (ops & jsampFlipSign)
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113 t ^= 0x8000;
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114
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115 *(sdata++) = t;
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116 }
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117 }
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118 return TRUE;
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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 /* Decodes a given 8-bit sample
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124 */
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43
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125 BOOL jssDecodeSample8(Uint8 * data, const size_t len, const int ops)
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0
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126 {
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43
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127 size_t count = len;
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0
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128 Sint8 t, value = 0;
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129
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43
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130 while (count--)
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0
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131 {
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43
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132 t = *data;
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0
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133
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134 if (ops & jsampDelta)
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135 t = value = t + value;
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136
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137 if (ops & jsampFlipSign)
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138 t ^= 0x80;
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139
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140 *(data++) = t;
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0
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141 }
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142 return TRUE;
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143 }
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144
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145
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146 /* Decodes a given 16-bit sample
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147 */
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43
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148 BOOL jssDecodeSample16(Uint16 * data, const size_t len, const int ops)
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0
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149 {
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150 if (ops & jsampSplit)
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151 {
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43
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152 size_t count, bufSize = len * sizeof(Uint16);
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0
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153 Uint8 *bp1, *bp2;
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154 Sint16 *tmpBuf, *sdata;
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155
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43
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156 if (!jssDecodeSample8((Uint8 *) data, bufSize, ops))
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0
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157 return FALSE;
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158
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159 tmpBuf = dmMalloc(bufSize);
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160 if (tmpBuf == NULL) return FALSE;
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43
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161 memcpy(tmpBuf, data, bufSize);
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0
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162
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43
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163 sdata = (Sint16 *) data;
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0
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164 bp1 = (Uint8 *) tmpBuf;
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43
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165 bp2 = bp1 + len;
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166 count = len;
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167 while (count--)
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0
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168 {
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169 *sdata++ = (*bp1++ << 8) | (*bp2++ & 0xff);
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170 }
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171
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172 dmFree(tmpBuf);
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173 }
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174 else
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175 {
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43
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176 Sint16 t, p, value = 0, *sdata = (Sint16 *) data;
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177 size_t count = len;
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178 while (count--)
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0
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179 {
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180 if (ops & jsampSwapEndianess)
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181 {
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182 p = *sdata;
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183 t = ((p >> 8) & 0xff) | ((p & 0xff) << 8);
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184 } else
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185 t = *sdata;
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186
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187 if (ops & jsampDelta)
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188 t = value = t + value;
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189
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190 if (ops & jsampFlipSign)
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191 t ^= 0x8000;
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192
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193 *(sdata++) = t;
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194 }
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195 }
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196 return TRUE;
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197 }
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198
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199
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200 /* Allocates a new module structure or returns errorvalue if failed.
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201 * Memory is allocated only for the basic structure. Sample- and pattern
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202 * areas must be allocated separately with appropriate routines.
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203 */
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204 JSSModule *jssAllocateModule(void)
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205 {
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206 int i;
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207 JSSModule *module;
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208
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209 // Allocate module structure
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210 module = dmMalloc0(sizeof(JSSModule));
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211 if (module == NULL)
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212 return NULL;
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213
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214 // Initialize structure
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215 for (i = 0; i < jsetNChannels; i++)
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216 module->defPanning[i] = jchPanMiddle;
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217
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218 for (i = 0; i < jsetMaxOrders; i++)
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219 module->orderList[i] = jsetOrderEnd;
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220
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221 // Allocate mutex
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222 #ifdef JSS_SUP_THREADS
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223 module->mutex = dmCreateMutex();
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224 #endif
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225
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226 return module;
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227 }
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228
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229
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230 /* Frees a given module structure, freeing all memory areas
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231 * that were allocated for it (including patterns, samples, etc.)
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232 */
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233 int jssFreeModule(JSSModule * module)
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234 {
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235 int i;
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236
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237 if (module == NULL)
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238 return DMERR_NULLPTR;
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239
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240 // Free strings
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241 #ifndef JSS_LIGHT
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242 dmFree(module->moduleName);
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243 dmFree(module->trackerName);
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244 #endif
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245
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246 // Free patterns
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247 for (i = 0; i < module->npatterns; i++)
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248 {
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249 if (module->patterns[i])
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250 {
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251 JSSPattern *pat = module->patterns[i];
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252 dmFree(pat->data);
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253 dmFree(pat);
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254 module->patterns[i] = NULL;
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255 }
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256 }
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257
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258 // Free instruments
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259 for (i = 0; i < module->ninstruments; i++)
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260 {
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261 if (module->instruments[i])
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262 {
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263 JSSInstrument *inst = module->instruments[i];
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264 #ifndef JSS_LIGHT
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265 dmFree(inst->desc);
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266 #endif
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267 dmFree(inst->data);
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268 dmFree(inst);
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269 module->instruments[i] = NULL;
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270 }
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271 }
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272
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273 // Free extended instruments
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274 for (i = 0; i < module->nextInstruments; i++)
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275 {
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276 if (module->extInstruments[i])
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277 {
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278 JSSExtInstrument *ext = module->extInstruments[i];
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279 #ifndef JSS_LIGHT
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280 dmFree(ext->desc);
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281 #endif
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282 dmFree(ext);
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283 module->extInstruments[i] = NULL;
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284 }
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285 }
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286
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287 // Free mutex
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288 #ifdef JSS_SUP_THREADS
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289 dmDestroyMutex(module->mutex);
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290 #endif
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291
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292 // Free the module structure
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293 memset(module, 0, sizeof(JSSModule));
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294 dmFree(module);
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295
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296 return DMERR_OK;
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297 }
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298
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299
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300 /* Allocates and initializes a internal pattern structure.
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301 */
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302 JSSPattern *jssAllocatePattern(int nrows, int nchannels)
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303 {
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304 int i, j;
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305 JSSPattern *res;
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306 JSSNote *pnote;
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307
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308 // Check arguments
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309 if (nrows <= 0 || nchannels <= 0)
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310 JSSERROR(DMERR_INVALID_ARGS, NULL, "Invalid nrows=%i or nchannels=%i.\n", nrows, nchannels);
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311
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312 // Allocate a pattern structure
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313 res = dmMalloc0(sizeof(JSSPattern));
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314 if (res == NULL)
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315 JSSERROR(DMERR_MALLOC, NULL, "Could not allocate pattern structure.\n");
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316
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317 // Allocate notedata
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318 res->data = dmCalloc(nrows * nchannels, sizeof(JSSNote));
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319 if (res->data == NULL)
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320 {
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321 dmFree(res);
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322 JSSERROR(DMERR_MALLOC, NULL, "Could not allocate pattern data (nrows=%i, nchannels=%i).\n", nrows,
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323 nchannels);
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324 }
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325
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326 // Initialize
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327 res->nrows = nrows;
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328 res->nchannels = nchannels;
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329
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330 pnote = res->data;
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331 for (j = 0; j < nrows; j++)
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332 {
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333 for (i = 0; i < nchannels; i++)
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334 {
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335 pnote->note = pnote->instrument = pnote->volume =
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336 pnote->effect = pnote->param = jsetNotSet;
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337
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338 pnote++;
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339 }
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340 }
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341
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342 // OK, return pointer to struct
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343 return res;
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344 }
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345
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346
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347 /* Allocates and initializes internal "normal" instrument structure.
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348 */
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349 JSSInstrument *jssAllocateInstrument(void)
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350 {
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351 JSSInstrument *res;
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352
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353 // Allocate a instrument structure
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354 res = dmMalloc0(sizeof(JSSInstrument));
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355 if (res == NULL)
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356 return NULL;
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357
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358 return res;
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359 }
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360
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361
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362 /* Allocates and initializes "extended" instrument structure.
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363 */
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364 JSSExtInstrument *jssAllocateExtInstrument(void)
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365 {
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366 int i;
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367 JSSExtInstrument *res;
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368
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369 // Allocate a instrument structure
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370 res = dmMalloc0(sizeof(JSSExtInstrument));
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371 if (res == NULL)
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372 return NULL;
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373
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374 for (i = 0; i < jsetNNotes; i++)
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375 {
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376 res->sNumForNotes[i] = jsetNotSet;
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377 }
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378
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379 return res;
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380 }
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