Mercurial > sdl-ios-xcode
annotate src/cdrom/SDL_cdrom.c @ 2847:7d020441fa81
Don't hardcode RECT for fragment program texture targets.
Now we can generate what a given system needs when compiling the shader.
author | Ryan C. Gordon <icculus@icculus.org> |
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date | Sun, 07 Dec 2008 07:06:34 +0000 |
parents | 204be4fc2726 |
children | 99210400e8b9 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
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22 #include "SDL_config.h" |
0 | 23 |
24 /* This is the CD-audio control API for Simple DirectMedia Layer */ | |
25 | |
26 #include "SDL_cdrom.h" | |
27 #include "SDL_syscdrom.h" | |
28 | |
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29 #define CLIP_FRAMES 10 /* Some CD-ROMs won't go all the way */ |
0 | 30 |
31 static int SDL_cdinitted = 0; | |
32 static SDL_CD *default_cdrom; | |
33 | |
34 /* The system level CD-ROM control functions */ | |
35 struct CDcaps SDL_CDcaps = { | |
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36 NULL, /* Name */ |
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37 NULL, /* Open */ |
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38 NULL, /* GetTOC */ |
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39 NULL, /* Status */ |
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40 NULL, /* Play */ |
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41 NULL, /* Pause */ |
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42 NULL, /* Resume */ |
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43 NULL, /* Stop */ |
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44 NULL, /* Eject */ |
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45 NULL, /* Close */ |
0 | 46 }; |
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47 |
0 | 48 int SDL_numcds; |
49 | |
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50 int |
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51 SDL_CDROMInit(void) |
0 | 52 { |
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53 int retval; |
0 | 54 |
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55 SDL_numcds = 0; |
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56 retval = SDL_SYS_CDInit(); |
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57 if (retval == 0) { |
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58 SDL_cdinitted = 1; |
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59 } |
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60 default_cdrom = NULL; |
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61 return (retval); |
0 | 62 } |
63 | |
64 /* Check to see if the CD-ROM subsystem has been initialized */ | |
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65 static int |
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66 CheckInit(int check_cdrom, SDL_CD ** cdrom) |
0 | 67 { |
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68 int okay; |
0 | 69 |
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70 okay = SDL_cdinitted; |
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71 if (check_cdrom && (*cdrom == NULL)) { |
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72 *cdrom = default_cdrom; |
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73 if (*cdrom == NULL) { |
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74 SDL_SetError("CD-ROM not opened"); |
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75 okay = 0; |
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76 } |
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77 } |
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78 if (!SDL_cdinitted) { |
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79 SDL_SetError("CD-ROM subsystem not initialized"); |
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80 } |
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81 return (okay); |
0 | 82 } |
83 | |
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84 int |
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85 SDL_CDNumDrives(void) |
0 | 86 { |
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87 if (!CheckInit(0, NULL)) { |
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88 return (-1); |
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89 } |
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90 return (SDL_numcds); |
0 | 91 } |
92 | |
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93 const char * |
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94 SDL_CDName(int drive) |
0 | 95 { |
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96 if (!CheckInit(0, NULL)) { |
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97 return (NULL); |
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98 } |
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99 if (drive >= SDL_numcds) { |
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100 SDL_SetError("Invalid CD-ROM drive index"); |
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101 return (NULL); |
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102 } |
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103 if (SDL_CDcaps.Name) { |
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104 return (SDL_CDcaps.Name(drive)); |
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105 } else { |
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106 return (""); |
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107 } |
0 | 108 } |
109 | |
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110 SDL_CD * |
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111 SDL_CDOpen(int drive) |
0 | 112 { |
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113 struct SDL_CD *cdrom; |
0 | 114 |
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115 if (!CheckInit(0, NULL)) { |
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116 return (NULL); |
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117 } |
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118 if (drive >= SDL_numcds) { |
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119 SDL_SetError("Invalid CD-ROM drive index"); |
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120 return (NULL); |
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121 } |
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122 cdrom = (SDL_CD *) SDL_malloc(sizeof(*cdrom)); |
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123 if (cdrom == NULL) { |
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124 SDL_OutOfMemory(); |
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125 return (NULL); |
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126 } |
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127 SDL_memset(cdrom, 0, sizeof(*cdrom)); |
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128 cdrom->id = SDL_CDcaps.Open(drive); |
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129 if (cdrom->id < 0) { |
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130 SDL_free(cdrom); |
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131 return (NULL); |
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132 } |
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133 default_cdrom = cdrom; |
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134 return (cdrom); |
0 | 135 } |
136 | |
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137 CDstatus |
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138 SDL_CDStatus(SDL_CD * cdrom) |
0 | 139 { |
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140 CDstatus status; |
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141 int i; |
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142 Uint32 position; |
0 | 143 |
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144 /* Check if the CD-ROM subsystem has been initialized */ |
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145 if (!CheckInit(1, &cdrom)) { |
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146 return (CD_ERROR); |
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147 } |
0 | 148 |
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149 /* Get the current status of the drive */ |
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150 cdrom->numtracks = 0; |
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151 cdrom->cur_track = 0; |
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152 cdrom->cur_frame = 0; |
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153 status = SDL_CDcaps.Status(cdrom, &i); |
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154 position = (Uint32) i; |
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155 cdrom->status = status; |
0 | 156 |
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157 /* Get the table of contents, if there's a CD available */ |
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158 if (CD_INDRIVE(status)) { |
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159 if (SDL_CDcaps.GetTOC(cdrom) < 0) { |
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160 status = CD_ERROR; |
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161 } |
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162 /* If the drive is playing, get current play position */ |
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163 if ((status == CD_PLAYING) || (status == CD_PAUSED)) { |
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164 for (i = 1; cdrom->track[i].offset <= position; ++i) { |
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165 /* Keep looking */ ; |
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166 } |
0 | 167 #ifdef DEBUG_CDROM |
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168 fprintf(stderr, |
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169 "Current position: %d, track = %d (offset is %d)\n", |
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170 position, i - 1, cdrom->track[i - 1].offset); |
0 | 171 #endif |
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172 cdrom->cur_track = i - 1; |
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173 position -= cdrom->track[cdrom->cur_track].offset; |
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174 cdrom->cur_frame = position; |
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175 } |
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176 } |
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177 return (status); |
0 | 178 } |
179 | |
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180 int |
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181 SDL_CDPlayTracks(SDL_CD * cdrom, |
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182 int strack, int sframe, int ntracks, int nframes) |
0 | 183 { |
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184 int etrack, eframe; |
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185 int start, length; |
0 | 186 |
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187 /* Check if the CD-ROM subsystem has been initialized */ |
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188 if (!CheckInit(1, &cdrom)) { |
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189 return (CD_ERROR); |
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190 } |
0 | 191 |
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192 /* Determine the starting and ending tracks */ |
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193 if ((strack < 0) || (strack >= cdrom->numtracks)) { |
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194 SDL_SetError("Invalid starting track"); |
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195 return (CD_ERROR); |
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196 } |
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197 if (!ntracks && !nframes) { |
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198 etrack = cdrom->numtracks; |
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199 eframe = 0; |
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200 } else { |
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201 etrack = strack + ntracks; |
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202 if (etrack == strack) { |
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203 eframe = sframe + nframes; |
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204 } else { |
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205 eframe = nframes; |
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206 } |
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207 } |
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208 if (etrack > cdrom->numtracks) { |
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209 SDL_SetError("Invalid play length"); |
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210 return (CD_ERROR); |
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211 } |
0 | 212 |
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213 /* Skip data tracks and verify frame offsets */ |
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214 while ((strack <= etrack) && |
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215 (cdrom->track[strack].type == SDL_DATA_TRACK)) { |
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216 ++strack; |
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217 } |
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218 if (sframe >= (int) cdrom->track[strack].length) { |
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219 SDL_SetError("Invalid starting frame for track %d", strack); |
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220 return (CD_ERROR); |
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221 } |
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222 while ((etrack > strack) && |
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223 (cdrom->track[etrack - 1].type == SDL_DATA_TRACK)) { |
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224 --etrack; |
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225 } |
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226 if (eframe > (int) cdrom->track[etrack].length) { |
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227 SDL_SetError("Invalid ending frame for track %d", etrack); |
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228 return (CD_ERROR); |
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229 } |
0 | 230 |
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231 /* Determine start frame and play length */ |
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232 start = (cdrom->track[strack].offset + sframe); |
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233 length = (cdrom->track[etrack].offset + eframe) - start; |
0 | 234 #ifdef CLIP_FRAMES |
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235 /* I've never seen this necessary, but xmcd does it.. */ |
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236 length -= CLIP_FRAMES; /* CLIP_FRAMES == 10 */ |
0 | 237 #endif |
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238 if (length < 0) { |
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239 return (0); |
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240 } |
0 | 241 |
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242 /* Play! */ |
0 | 243 #ifdef DEBUG_CDROM |
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244 fprintf(stderr, "Playing %d frames at offset %d\n", length, start); |
0 | 245 #endif |
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246 return (SDL_CDcaps.Play(cdrom, start, length)); |
0 | 247 } |
248 | |
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249 int |
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250 SDL_CDPlay(SDL_CD * cdrom, int sframe, int length) |
0 | 251 { |
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252 /* Check if the CD-ROM subsystem has been initialized */ |
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253 if (!CheckInit(1, &cdrom)) { |
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254 return (CD_ERROR); |
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255 } |
0 | 256 |
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257 return (SDL_CDcaps.Play(cdrom, sframe, length)); |
0 | 258 } |
259 | |
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260 int |
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261 SDL_CDPause(SDL_CD * cdrom) |
0 | 262 { |
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263 CDstatus status; |
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264 int retval; |
0 | 265 |
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266 /* Check if the CD-ROM subsystem has been initialized */ |
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267 if (!CheckInit(1, &cdrom)) { |
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268 return (CD_ERROR); |
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269 } |
0 | 270 |
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271 status = SDL_CDcaps.Status(cdrom, NULL); |
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272 switch (status) { |
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273 case CD_PLAYING: |
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274 retval = SDL_CDcaps.Pause(cdrom); |
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275 break; |
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276 default: |
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277 retval = 0; |
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278 break; |
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279 } |
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280 return (retval); |
0 | 281 } |
282 | |
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283 int |
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284 SDL_CDResume(SDL_CD * cdrom) |
0 | 285 { |
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286 CDstatus status; |
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287 int retval; |
0 | 288 |
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289 /* Check if the CD-ROM subsystem has been initialized */ |
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290 if (!CheckInit(1, &cdrom)) { |
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291 return (CD_ERROR); |
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292 } |
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293 |
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294 status = SDL_CDcaps.Status(cdrom, NULL); |
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295 switch (status) { |
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296 case CD_PAUSED: |
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297 retval = SDL_CDcaps.Resume(cdrom); |
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298 default: |
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299 retval = 0; |
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300 break; |
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301 } |
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302 return (retval); |
0 | 303 } |
304 | |
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305 int |
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306 SDL_CDStop(SDL_CD * cdrom) |
0 | 307 { |
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308 CDstatus status; |
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309 int retval; |
0 | 310 |
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311 /* Check if the CD-ROM subsystem has been initialized */ |
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312 if (!CheckInit(1, &cdrom)) { |
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313 return (CD_ERROR); |
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314 } |
0 | 315 |
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316 status = SDL_CDcaps.Status(cdrom, NULL); |
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317 switch (status) { |
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318 case CD_PLAYING: |
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319 case CD_PAUSED: |
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320 retval = SDL_CDcaps.Stop(cdrom); |
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321 default: |
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322 retval = 0; |
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323 break; |
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324 } |
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325 return (retval); |
0 | 326 } |
327 | |
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328 int |
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329 SDL_CDEject(SDL_CD * cdrom) |
0 | 330 { |
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331 /* Check if the CD-ROM subsystem has been initialized */ |
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332 if (!CheckInit(1, &cdrom)) { |
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333 return (CD_ERROR); |
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334 } |
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335 return (SDL_CDcaps.Eject(cdrom)); |
0 | 336 } |
337 | |
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338 void |
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339 SDL_CDClose(SDL_CD * cdrom) |
0 | 340 { |
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341 /* Check if the CD-ROM subsystem has been initialized */ |
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342 if (!CheckInit(1, &cdrom)) { |
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343 return; |
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344 } |
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345 SDL_CDcaps.Close(cdrom); |
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346 SDL_free(cdrom); |
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347 default_cdrom = NULL; |
0 | 348 } |
349 | |
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350 void |
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351 SDL_CDROMQuit(void) |
0 | 352 { |
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353 SDL_SYS_CDQuit(); |
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354 SDL_cdinitted = 0; |
0 | 355 } |
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356 |
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357 /* vi: set ts=4 sw=4 expandtab: */ |