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annotate cue.c @ 2080:bafb757e1cd2

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Implement CD audio
author Michael Pavone <pavone@retrodev.com>
date Wed, 02 Feb 2022 01:10:07 -0800
parents 5a2b759f6b2d
children 0db3af42dd72
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2059
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1 #include <ctype.h>
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2 #include <string.h>
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3
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4 #include "system.h"
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5 #include "util.h"
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6
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7 static char* cmd_start(char *cur)
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8 {
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9 while (*cur && isblank(*cur))
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10 {
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11 cur++;
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12 }
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13 return cur;
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14 }
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15
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16 static char* next_line(char *cur)
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17 {
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18 while (*cur && *cur != '\n')
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19 {
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20 cur++;
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21 }
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22 if (*cur) {
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23 return cur + 1;
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24 }
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25 return NULL;
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26 }
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27
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28 static uint32_t timecode_to_lba(char *timecode)
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29 {
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30 char *end;
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31 int seconds = 0, frames = 0;
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32 int minutes = strtol(timecode, &end, 10);
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33 if (end) {
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34 timecode = end + 1;
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35 seconds = strtol(timecode, &end, 10);
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36 if (end) {
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37 timecode = end + 1;
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38 frames = strtol(timecode, NULL, 10);
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39 }
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40 }
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41 seconds += minutes * 60;
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42 return seconds * 75 + frames;
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43
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44 }
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45
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46 enum {
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47 FAKE_DATA = 1,
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48 FAKE_AUDIO,
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49 };
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50
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51 static uint8_t bin_seek(system_media *media, uint32_t sector)
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52 {
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53 media->cur_sector = sector;
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54 uint32_t lba = sector;
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55 uint8_t track;
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56 for (track = 0; track < media->num_tracks; track++)
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57 {
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58 if (lba < media->tracks[track].fake_pregap) {
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59 media->in_fake_pregap = media->tracks[track].type == TRACK_DATA ? FAKE_DATA : FAKE_AUDIO;
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60 break;
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61 }
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62 lba -= media->tracks[track].fake_pregap;
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63 if (lba < media->tracks[track].start_lba) {
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64 media->in_fake_pregap = media->tracks[track].type == TRACK_DATA ? FAKE_DATA : FAKE_AUDIO;
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65 break;
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66 }
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67 if (lba < media->tracks[track].end_lba) {
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68 media->in_fake_pregap = 0;
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69 break;
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70 }
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71 }
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72 if (!media->in_fake_pregap) {
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73 fseek(media->f, lba * 2352, SEEK_SET);
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74 }
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75 return track;
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76 }
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77
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78 static uint8_t fake_read(uint32_t sector, uint32_t offset)
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79 {
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80 if (!offset || (offset >= 16)) {
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81 return 0;
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82 //TODO: error detection and correction bytes
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83 } else if (offset < 12) {
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84 return 0xFF;
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85 } else if (offset == 12) {
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86 uint32_t minute = (sector / 75) / 60;
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87 return (minute % 10) | ((minute / 10 ) << 4);
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88 } else if (offset == 13) {
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89 uint32_t seconds = (sector / 75) % 60;
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90 return (seconds % 10) | ((seconds / 10 ) << 4);
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91 } else if (offset == 14) {
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92 uint32_t frames = sector % 75;
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93 return (frames % 10) | ((frames / 10 ) << 4);
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94 } else {
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95 return 1;
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96 }
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97 }
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98
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99 static uint8_t bin_read(system_media *media, uint32_t offset)
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100 {
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101 if (media->in_fake_pregap == FAKE_DATA) {
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102 return fake_read(media->cur_sector, offset);
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103 } else if (media->in_fake_pregap == FAKE_AUDIO) {
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104 return 0;
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105 } else {
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106 return fgetc(media->f);
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107 }
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108 }
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109
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110 static uint8_t iso_seek(system_media *media, uint32_t sector)
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111 {
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112 media->cur_sector = sector;
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113 if (sector < (2 * 75)) {
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114 media->in_fake_pregap = FAKE_DATA;
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115 } else {
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116 media->in_fake_pregap = 0;
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117 fseek(media->f, (sector - 2 * 75) * 2048, SEEK_SET);
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118 }
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119 return 0;
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120 }
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121
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122 static uint8_t iso_read(system_media *media, uint32_t offset)
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123 {
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124 if (media->in_fake_pregap || offset < 16 || offset > (2048 + 16)) {
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125 return fake_read(media->cur_sector, offset);
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126 } else {
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127 return fgetc(media->f);
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128 }
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129 }
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130
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131 uint8_t parse_cue(system_media *media)
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132 {
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133 char *line = media->buffer;
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134 media->num_tracks = 0;
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135 do {
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136 char *cmd = cmd_start(line);
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137 if (cmd) {
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138 if (startswith(cmd, "TRACK ")) {
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139 media->num_tracks++;
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140 }
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diff changeset
141 line = next_line(cmd);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
142 } else {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
143 line = NULL;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
144 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
145 } while (line);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
146 track_info *tracks = calloc(sizeof(track_info), media->num_tracks);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
147 media->tracks = tracks;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
148 line = media->buffer;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
149 int track = -1;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
150 do {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
151 char *cmd = cmd_start(line);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
152 if (cmd) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
153 if (startswith(cmd, "TRACK ")) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
154 track++;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
155 cmd += 6;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
156 char *end;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
157 int file_track = strtol(cmd, &end, 10);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
158 if (file_track != (track + 1)) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
159 warning("Expected track %d, but found track %d in CUE sheet\n", track + 1, file_track);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
160 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
161 cmd = cmd_start(end);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
162 if (cmd) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
163 tracks[track].type = startswith(cmd, "AUDIO") ? TRACK_AUDIO : TRACK_DATA;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
164 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
165 } else if (startswith(cmd, "FILE ")) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
166 if (media->f) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
167 warning("CUE sheets with multiple FILE commands are not supported\n");
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
168 } else {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
169 cmd += 5;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
170 cmd = strchr(cmd, '"');
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
171 if (cmd) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
172 cmd++;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
173 char *end = strchr(cmd, '"');
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
174 if (end) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
175 char *fname;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
176 //TODO: zipped BIN/CUE support
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
177 if (is_absolute_path(cmd)) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
178 fname = malloc(end-cmd + 1);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
179 memcpy(fname, cmd, end-cmd);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
180 fname[end-cmd] = 0;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
181 } else {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
182 size_t dirlen = strlen(media->dir);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
183 fname = malloc(dirlen + 1 + (end-cmd) + 1);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
184 memcpy(fname, media->dir, dirlen);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
185 fname[dirlen] = PATH_SEP[0];
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
186 memcpy(fname + dirlen + 1, cmd, end-cmd);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
187 fname[dirlen + 1 + (end-cmd)] = 0;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
188 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
189 media->f = fopen(fname, "rb");
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
190 if (!media->f) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
191 fatal_error("Failed to open %s specified by FILE command in CUE sheet %s.%s\n", fname, media->name, media->extension);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
192 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
193 free(fname);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
194 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
195 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
196 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
197 } else if (track >= 0) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
198 if (startswith(cmd, "PREGAP ")) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
199 tracks[track].fake_pregap = timecode_to_lba(cmd + 7);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
200 } else if (startswith(cmd, "INDEX ")) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
201 char *after;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
202 int index = strtol(cmd + 6, &after, 10);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
203 if (!index) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
204 tracks[track].pregap_lba = timecode_to_lba(after);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
205 } else if (index == 1) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
206 tracks[track].start_lba = timecode_to_lba(after);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
207 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
208 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
209 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
210 if (cmd) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
211 line = next_line(cmd);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
212 } else {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
213 line = NULL;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
214 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
215 } else {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
216 line = NULL;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
217 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
218 } while (line);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
219 for (uint32_t i = 0; i < (media->num_tracks - 1); i++)
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
220 {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
221 uint32_t next = i + 1;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
222 tracks[i].end_lba = tracks[next].pregap_lba ? tracks[next].pregap_lba : tracks[next].start_lba;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
223 }
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
224 if (media->f) {
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
225 //end of last track is implicitly defined by file size
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
226 tracks[media->num_tracks-1].end_lba = file_size(media->f) / 2352;
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
227 //replace cue sheet with first sector
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
228 free(media->buffer);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
229 media->buffer = calloc(2048, 1);
2062
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
230 if (tracks[0].type = TRACK_DATA) {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
231 // if the first track is a data track, don't trust the CUE sheet and look at the MM:SS:FF from first sector
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
232 uint8_t msf[3];
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
233 fseek(media->f, 12, SEEK_SET);
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
234 if (sizeof(msf) == fread(msf, 1, sizeof(msf), media->f)) {
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
235 tracks[0].fake_pregap = msf[2] + (msf[0] * 60 + msf[1]) * 75;
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
236 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
237 }
07ed42bd7b4c Some progress on CDC and CDD emulation. Now passes first 3 "CDC INIT" tests in mcd-verificator
Michael Pavone <pavone@retrodev.com>
parents: 2061
diff changeset
238
2059
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
239 fseek(media->f, 16, SEEK_SET);
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
240 media->size = fread(media->buffer, 1, 2048, media->f);
2076
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
241 media->seek = bin_seek;
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
242 media->read = bin_read;
2059
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
243 }
2061
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents: 2059
diff changeset
244 uint8_t valid = tracks > 0 && media->f != NULL;
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents: 2059
diff changeset
245 media->type = valid ? MEDIA_CDROM : MEDIA_CART;
7c1760b5b3e5 Implemented basic TOC functionality of CDD MCU
Michael Pavone <pavone@retrodev.com>
parents: 2059
diff changeset
246 return valid;
2059
6399a776e981 Add basic support for BIN/CUE images
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
247 }
2076
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
248
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
249 uint32_t make_iso_media(system_media *media, const char *filename)
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
250 {
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
251 media->f = fopen(filename, "rb");
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
252 if (!media->f) {
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
253 return 0;
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
254 }
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
255 media->buffer = calloc(2048, 1);
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
256 media->size = fread(media->buffer, 1, 2048, media->f);
2079
5a2b759f6b2d BIOS doesn't like it if TOC read happens too quickly
Michael Pavone <pavone@retrodev.com>
parents: 2076
diff changeset
257 media->num_tracks = 1;
5a2b759f6b2d BIOS doesn't like it if TOC read happens too quickly
Michael Pavone <pavone@retrodev.com>
parents: 2076
diff changeset
258 media->tracks = calloc(sizeof(track_info), 1);
2076
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
259 media->tracks[0] = (track_info){
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
260 .fake_pregap = 2 * 75,
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
261 .start_lba = 0,
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
262 .end_lba = file_size(media->f),
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
263 .type = TRACK_DATA
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
264 };
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
265 media->type = MEDIA_CDROM;
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
266 media->seek = iso_seek;
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
267 media->read = iso_read;
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
268 return media->size;
3f29e2726522 Added basic support for ISO images for games that only have a data track
Michael Pavone <pavone@retrodev.com>
parents: 2074
diff changeset
269 }