FreeCalypso > hg > freecalypso-tools

annotate ringtools/fc-e1decode.c @ 1012:11391cb6bdc0

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patch from fixeria: doc change from SE K2x0 to K2xx Since their discovery in late 2022, Sony Ericsson K200 and K220 phones were collectively referred to as SE K2x0 in FreeCalypso documentation. However, now that SE K205 has been discovered as yet another member of the same family (same PCBA in different case), it makes more sense to refer to the whole family as SE K2xx.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 23 Sep 2024 12:23:20 +0000
parents c8806a5d4a6a
children
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176
2b38691076b9 fc-e1decode utility written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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2 * This program decodes a binary Melody E1 file into the ASCII source format
2b38691076b9 fc-e1decode utility written, compiles
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3 * of our own invention which fc-e1gen accepts as input.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
2b38691076b9 fc-e1decode utility written, compiles
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8 #include <stdlib.h>
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9 #include <ctype.h>
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10 #include <string.h>
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11 #include <strings.h>
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12
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13 char *infname;
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14 FILE *inf, *outf;
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15
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16 static unsigned
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17 get_word()
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18 {
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19 u_char b[2];
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20 int i, c;
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21
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22 for (i = 0; i < 2; i++) {
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23 c = getc(inf);
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24 if (c < 0) {
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25 fprintf(stderr, "error: premature EOF in %s\n",
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26 infname);
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27 exit(1);
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28 }
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29 b[i] = c;
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30 }
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31 return((b[1] << 8) | b[0]);
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32 }
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33
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34 do_global_osc_set()
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35 {
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36 unsigned word, osc;
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37
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38 word = get_word();
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39 fprintf(outf, "osc-set (%u)", word & 0xFF);
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40 for (osc = 0; osc < 8; osc++)
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41 if (word & (1 << (osc + 8)))
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42 fprintf(outf, " %u", osc);
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43 putc('\n', outf);
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44 putc('\n', outf);
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45 }
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46
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47 convert_signed_14bit(u)
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48 unsigned u;
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49 {
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50 int i;
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51
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52 i = u;
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53 if (i >= 8192)
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54 i -= 16384;
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55 return (i);
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56 }
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57
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58 convert_signed_5bit(u)
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59 unsigned u;
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60 {
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61 int i;
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62
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63 i = u;
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64 if (i >= 16)
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65 i -= 32;
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66 return (i);
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67 }
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68
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69 process_oscwords(osc, warnflags)
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70 unsigned osc, *warnflags;
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71 {
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72 unsigned word0, word1, extraword;
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73
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74 word0 = get_word();
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75 word1 = get_word();
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76 if (word1 & 0xF)
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77 *warnflags |= 1;
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78 fprintf(outf, "osc %u (%u)", osc, word0 & 1);
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79 if (word0 & 2) {
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80 fprintf(outf, " df %d %u", convert_signed_14bit(word0 >> 2),
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81 word1 >> 6);
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82 } else {
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83 if (word0 & 4)
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84 fputs(" sq1", outf);
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85 if (word0 & 8)
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86 fputs(" sq2", outf);
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87 fprintf(outf, " %u %u %u", (word0 >> 4) & 0x3F, word0 >> 10,
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88 word1 >> 6);
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89 }
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90 if (word1 & 0x10) {
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91 extraword = get_word();
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92 if (extraword & 0xFF)
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93 *warnflags |= 2;
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94 fprintf(outf, " trem %u %d", (extraword >> 8) & 7,
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95 convert_signed_5bit(extraword >> 11));
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96 }
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97 if (word1 & 0x20) {
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98 extraword = get_word();
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99 fprintf(outf, " env %u %u %u %u %u", extraword & 0xF,
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100 extraword >> 13, (extraword >> 10) & 7,
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101 (extraword >> 7) & 7, (extraword >> 4) & 7);
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102 }
178
c8806a5d4a6a fc-e1decode: forgot terminating newline on osc lines
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103 putc('\n', outf);
176
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104 }
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105
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106 process_block(timeword)
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107 unsigned timeword;
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108 {
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109 unsigned osc, warnflags[8], anywarn;
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110
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111 fprintf(outf, "time %u\n", timeword & 0xFF);
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112 for (osc = 0; osc < 8; osc++) {
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113 warnflags[osc] = 0;
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114 if (timeword & (1 << (osc + 8)))
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115 process_oscwords(osc, warnflags + osc);
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116 }
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117 putc('\n', outf);
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118 anywarn = 0;
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119 for (osc = 0; osc < 8; osc++) {
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120 if (warnflags[osc] & 1) {
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121 fprintf(outf,
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122 "# warning: reserved bits set in osc %u word1 above\n",
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123 osc);
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124 anywarn = 1;
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125 }
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126 if (warnflags[osc] & 2) {
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127 fprintf(outf,
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128 "# warning: reserved bits set in osc %u word2 above\n",
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129 osc);
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130 anywarn = 1;
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131 }
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132 }
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133 if (anywarn)
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134 putc('\n', outf);
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135 }
2b38691076b9 fc-e1decode utility written, compiles
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136
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137 main(argc, argv)
2b38691076b9 fc-e1decode utility written, compiles
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138 char **argv;
2b38691076b9 fc-e1decode utility written, compiles
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139 {
2b38691076b9 fc-e1decode utility written, compiles
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140 unsigned timeword;
2b38691076b9 fc-e1decode utility written, compiles
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141
2b38691076b9 fc-e1decode utility written, compiles
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142 if (argc < 2 || argc > 3) {
2b38691076b9 fc-e1decode utility written, compiles
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143 fprintf(stderr, "usage: %s infile [outfile]\n", argv[0]);
2b38691076b9 fc-e1decode utility written, compiles
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144 exit(1);
2b38691076b9 fc-e1decode utility written, compiles
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145 }
2b38691076b9 fc-e1decode utility written, compiles
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146 infname = argv[1];
2b38691076b9 fc-e1decode utility written, compiles
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147 inf = fopen(infname, "r");
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Mychaela Falconia <falcon@freecalypso.org>
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148 if (!inf) {
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Mychaela Falconia <falcon@freecalypso.org>
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149 perror(infname);
2b38691076b9 fc-e1decode utility written, compiles
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150 exit(1);
2b38691076b9 fc-e1decode utility written, compiles
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151 }
2b38691076b9 fc-e1decode utility written, compiles
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152 if (argc > 2) {
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153 outf = fopen(argv[2], "w");
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154 if (!outf) {
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155 perror(argv[2]);
2b38691076b9 fc-e1decode utility written, compiles
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156 exit(1);
2b38691076b9 fc-e1decode utility written, compiles
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157 }
2b38691076b9 fc-e1decode utility written, compiles
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158 } else
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159 outf = stdout;
2b38691076b9 fc-e1decode utility written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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160 do_global_osc_set();
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161 for (;;) {
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162 timeword = get_word();
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Mychaela Falconia <falcon@freecalypso.org>
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163 if (timeword == 0)
2b38691076b9 fc-e1decode utility written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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164 break;
2b38691076b9 fc-e1decode utility written, compiles
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165 process_block(timeword);
2b38691076b9 fc-e1decode utility written, compiles
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166 }
2b38691076b9 fc-e1decode utility written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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167 fputs("end\n", outf);
2b38691076b9 fc-e1decode utility written, compiles
Mychaela Falconia <falcon@freecalypso.org>
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168 exit(0);
2b38691076b9 fc-e1decode utility written, compiles
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169 }