| 1 | /*************************************************************************************** |
| 2 | * Genesis Plus |
| 3 | * CD drive processor & CD-DA fader |
| 4 | * |
| 5 | * Copyright (C) 2012-2013 Eke-Eke (Genesis Plus GX) |
| 6 | * |
| 7 | * Redistribution and use of this code or any derivative works are permitted |
| 8 | * provided that the following conditions are met: |
| 9 | * |
| 10 | * - Redistributions may not be sold, nor may they be used in a commercial |
| 11 | * product or activity. |
| 12 | * |
| 13 | * - Redistributions that are modified from the original source must include the |
| 14 | * complete source code, including the source code for all components used by a |
| 15 | * binary built from the modified sources. However, as a special exception, the |
| 16 | * source code distributed need not include anything that is normally distributed |
| 17 | * (in either source or binary form) with the major components (compiler, kernel, |
| 18 | * and so on) of the operating system on which the executable runs, unless that |
| 19 | * component itself accompanies the executable. |
| 20 | * |
| 21 | * - Redistributions must reproduce the above copyright notice, this list of |
| 22 | * conditions and the following disclaimer in the documentation and/or other |
| 23 | * materials provided with the distribution. |
| 24 | * |
| 25 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 26 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 29 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 35 | * POSSIBILITY OF SUCH DAMAGE. |
| 36 | * |
| 37 | ****************************************************************************************/ |
| 38 | |
| 39 | #include "../pico_int.h" |
| 40 | #include "genplus_macros.h" |
| 41 | #include "cue.h" |
| 42 | #include "cdd.h" |
| 43 | |
| 44 | #ifdef USE_LIBTREMOR |
| 45 | #define SUPPORTED_EXT 20 |
| 46 | #else |
| 47 | #define SUPPORTED_EXT 10 |
| 48 | #endif |
| 49 | |
| 50 | cdd_t cdd; |
| 51 | |
| 52 | /* BCD conversion lookup tables */ |
| 53 | static const uint8 lut_BCD_8[100] = |
| 54 | { |
| 55 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, |
| 56 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, |
| 57 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, |
| 58 | 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, |
| 59 | 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, |
| 60 | 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, |
| 61 | 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
| 62 | 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, |
| 63 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, |
| 64 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, |
| 65 | }; |
| 66 | |
| 67 | static const uint16 lut_BCD_16[100] = |
| 68 | { |
| 69 | 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, |
| 70 | 0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107, 0x0108, 0x0109, |
| 71 | 0x0200, 0x0201, 0x0202, 0x0203, 0x0204, 0x0205, 0x0206, 0x0207, 0x0208, 0x0209, |
| 72 | 0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307, 0x0308, 0x0309, |
| 73 | 0x0400, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0406, 0x0407, 0x0408, 0x0409, |
| 74 | 0x0500, 0x0501, 0x0502, 0x0503, 0x0504, 0x0505, 0x0506, 0x0507, 0x0508, 0x0509, |
| 75 | 0x0600, 0x0601, 0x0602, 0x0603, 0x0604, 0x0605, 0x0606, 0x0607, 0x0608, 0x0609, |
| 76 | 0x0700, 0x0701, 0x0702, 0x0703, 0x0704, 0x0705, 0x0706, 0x0707, 0x0708, 0x0709, |
| 77 | 0x0800, 0x0801, 0x0802, 0x0803, 0x0804, 0x0805, 0x0806, 0x0807, 0x0808, 0x0809, |
| 78 | 0x0900, 0x0901, 0x0902, 0x0903, 0x0904, 0x0905, 0x0906, 0x0907, 0x0908, 0x0909, |
| 79 | }; |
| 80 | |
| 81 | /* pre-build TOC */ |
| 82 | static const uint16 toc_snatcher[21] = |
| 83 | { |
| 84 | 56014, 495, 10120, 20555, 1580, 5417, 12502, 16090, 6553, 9681, |
| 85 | 8148, 20228, 8622, 6142, 5858, 1287, 7424, 3535, 31697, 2485, |
| 86 | 31380 |
| 87 | }; |
| 88 | |
| 89 | static const uint16 toc_lunar[52] = |
| 90 | { |
| 91 | 5422, 1057, 7932, 5401, 6380, 6592, 5862, 5937, 5478, 5870, |
| 92 | 6673, 6613, 6429, 4996, 4977, 5657, 3720, 5892, 3140, 3263, |
| 93 | 6351, 5187, 3249, 1464, 1596, 1750, 1751, 6599, 4578, 5205, |
| 94 | 1550, 1827, 2328, 1346, 1569, 1613, 7199, 4928, 1656, 2549, |
| 95 | 1875, 3901, 1850, 2399, 2028, 1724, 4889, 14551, 1184, 2132, |
| 96 | 685, 3167 |
| 97 | }; |
| 98 | |
| 99 | static const uint32 toc_shadow[15] = |
| 100 | { |
| 101 | 10226, 70054, 11100, 12532, 12444, 11923, 10059, 10167, 10138, 13792, |
| 102 | 11637, 2547, 2521, 3856, 900 |
| 103 | }; |
| 104 | |
| 105 | static const uint32 toc_dungeon[13] = |
| 106 | { |
| 107 | 2250, 22950, 16350, 24900, 13875, 19950, 13800, 15375, 17400, 17100, |
| 108 | 3325, 6825, 25275 |
| 109 | }; |
| 110 | |
| 111 | static const uint32 toc_ffight[26] = |
| 112 | { |
| 113 | 11994, 9742, 10136, 9685, 9553, 14588, 9430, 8721, 9975, 9764, |
| 114 | 9704, 12796, 585, 754, 951, 624, 9047, 1068, 817, 9191, 1024, |
| 115 | 14562, 10320, 8627, 3795, 3047 |
| 116 | }; |
| 117 | |
| 118 | static const uint32 toc_ffightj[29] = |
| 119 | { |
| 120 | 11994, 9752, 10119, 9690, 9567, 14575, 9431, 8731, 9965, 9763, |
| 121 | 9716, 12791, 579, 751, 958, 630, 9050, 1052, 825, 9193, 1026, |
| 122 | 14553, 9834, 10542, 1699, 1792, 1781, 3783, 3052 |
| 123 | }; |
| 124 | |
| 125 | #if 0 |
| 126 | /* supported WAVE file header (16-bit stereo samples @44.1kHz) */ |
| 127 | static const unsigned char waveHeader[32] = |
| 128 | { |
| 129 | 0x57,0x41,0x56,0x45,0x66,0x6d,0x74,0x20,0x10,0x00,0x00,0x00,0x01,0x00,0x02,0x00, |
| 130 | 0x44,0xac,0x00,0x00,0x10,0xb1,0x02,0x00,0x04,0x00,0x10,0x00,0x64,0x61,0x74,0x61 |
| 131 | }; |
| 132 | #endif |
| 133 | |
| 134 | #ifdef USE_LIBTREMOR |
| 135 | #ifdef DISABLE_MANY_OGG_OPEN_FILES |
| 136 | static void ogg_free(int i) |
| 137 | { |
| 138 | /* clear OGG file descriptor to prevent file from being closed */ |
| 139 | cdd.toc.tracks[i].vf.datasource = NULL; |
| 140 | |
| 141 | /* close VORBIS file structure */ |
| 142 | ov_clear(&cdd.toc.tracks[i].vf); |
| 143 | |
| 144 | /* indicates that the track is a seekable VORBIS file */ |
| 145 | cdd.toc.tracks[i].vf.seekable = 1; |
| 146 | |
| 147 | /* reset file reading position */ |
| 148 | fseek(cdd.toc.tracks[i].fd, 0, SEEK_SET); |
| 149 | } |
| 150 | #endif |
| 151 | #endif |
| 152 | |
| 153 | void cdd_reset(void) |
| 154 | { |
| 155 | /* reset cycle counter */ |
| 156 | cdd.cycles = 0; |
| 157 | |
| 158 | /* reset drive access latency */ |
| 159 | cdd.latency = 0; |
| 160 | |
| 161 | /* reset track index */ |
| 162 | cdd.index = 0; |
| 163 | |
| 164 | /* reset logical block address */ |
| 165 | cdd.lba = 0; |
| 166 | |
| 167 | /* reset status */ |
| 168 | cdd.status = NO_DISC; |
| 169 | |
| 170 | /* reset CD-DA fader (full volume) */ |
| 171 | cdd.volume = 0x400; |
| 172 | |
| 173 | /* clear CD-DA output */ |
| 174 | cdd.audio[0] = cdd.audio[1] = 0; |
| 175 | } |
| 176 | |
| 177 | /* FIXME: use cdd_read_audio() instead */ |
| 178 | static void cdd_change_track(int index, int lba) |
| 179 | { |
| 180 | int i, base, lba_offset, lb_len; |
| 181 | |
| 182 | for (i = index; i > 0; i--) |
| 183 | if (cdd.toc.tracks[i].fd != NULL) |
| 184 | break; |
| 185 | |
| 186 | Pico_mcd->cdda_stream = cdd.toc.tracks[i].fd; |
| 187 | base = cdd.toc.tracks[index].offset; |
| 188 | lba_offset = lba - cdd.toc.tracks[index].start; |
| 189 | lb_len = cdd.toc.tracks[index].end - cdd.toc.tracks[index].start; |
| 190 | |
| 191 | elprintf(EL_CD, "play #%d lba %d base %d", index, lba, base); |
| 192 | |
| 193 | cdda_start_play(base, lba_offset, lb_len); |
| 194 | } |
| 195 | |
| 196 | int cdd_context_save(uint8 *state) |
| 197 | { |
| 198 | int bufferptr = 0; |
| 199 | |
| 200 | save_param(&cdd.cycles, sizeof(cdd.cycles)); |
| 201 | save_param(&cdd.latency, sizeof(cdd.latency)); |
| 202 | save_param(&cdd.index, sizeof(cdd.index)); |
| 203 | save_param(&cdd.lba, sizeof(cdd.lba)); |
| 204 | save_param(&cdd.scanOffset, sizeof(cdd.scanOffset)); |
| 205 | save_param(&cdd.volume, sizeof(cdd.volume)); |
| 206 | save_param(&cdd.status, sizeof(cdd.status)); |
| 207 | |
| 208 | return bufferptr; |
| 209 | } |
| 210 | |
| 211 | int cdd_context_load(uint8 *state) |
| 212 | { |
| 213 | int lba; |
| 214 | int bufferptr = 0; |
| 215 | |
| 216 | #ifdef USE_LIBTREMOR |
| 217 | #ifdef DISABLE_MANY_OGG_OPEN_FILES |
| 218 | /* close previous track VORBIS file structure to save memory */ |
| 219 | if (cdd.toc.tracks[cdd.index].vf.datasource) |
| 220 | { |
| 221 | ogg_free(cdd.index); |
| 222 | } |
| 223 | #endif |
| 224 | #endif |
| 225 | |
| 226 | load_param(&cdd.cycles, sizeof(cdd.cycles)); |
| 227 | load_param(&cdd.latency, sizeof(cdd.latency)); |
| 228 | load_param(&cdd.index, sizeof(cdd.index)); |
| 229 | load_param(&cdd.lba, sizeof(cdd.lba)); |
| 230 | load_param(&cdd.scanOffset, sizeof(cdd.scanOffset)); |
| 231 | load_param(&cdd.volume, sizeof(cdd.volume)); |
| 232 | load_param(&cdd.status, sizeof(cdd.status)); |
| 233 | |
| 234 | /* adjust current LBA within track limit */ |
| 235 | lba = cdd.lba; |
| 236 | if (lba < cdd.toc.tracks[cdd.index].start) |
| 237 | { |
| 238 | lba = cdd.toc.tracks[cdd.index].start; |
| 239 | } |
| 240 | |
| 241 | /* seek to current track position */ |
| 242 | if (!cdd.index) |
| 243 | { |
| 244 | /* DATA track */ |
| 245 | if (cdd.toc.tracks[0].fd) |
| 246 | { |
| 247 | pm_seek(cdd.toc.tracks[0].fd, lba * cdd.sectorSize, SEEK_SET); |
| 248 | } |
| 249 | } |
| 250 | #ifdef USE_LIBTREMOR |
| 251 | else if (cdd.toc.tracks[cdd.index].vf.seekable) |
| 252 | { |
| 253 | #ifdef DISABLE_MANY_OGG_OPEN_FILES |
| 254 | /* VORBIS file need to be opened first */ |
| 255 | ov_open(cdd.toc.tracks[cdd.index].fd,&cdd.toc.tracks[cdd.index].vf,0,0); |
| 256 | #endif |
| 257 | /* VORBIS AUDIO track */ |
| 258 | ov_pcm_seek(&cdd.toc.tracks[cdd.index].vf, (lba - cdd.toc.tracks[cdd.index].start) * 588 - cdd.toc.tracks[cdd.index].offset); |
| 259 | } |
| 260 | #endif |
| 261 | #if 0 |
| 262 | else if (cdd.toc.tracks[cdd.index].fd) |
| 263 | { |
| 264 | /* PCM AUDIO track */ |
| 265 | fseek(cdd.toc.tracks[cdd.index].fd, (lba * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET); |
| 266 | } |
| 267 | #else |
| 268 | else |
| 269 | { |
| 270 | cdd_change_track(cdd.index, lba); |
| 271 | } |
| 272 | #endif |
| 273 | |
| 274 | return bufferptr; |
| 275 | } |
| 276 | |
| 277 | int cdd_context_load_old(uint8 *state) |
| 278 | { |
| 279 | memcpy(&cdd.lba, state + 8, sizeof(cdd.lba)); |
| 280 | return 12 * 4; |
| 281 | } |
| 282 | |
| 283 | int cdd_load(const char *filename, int type) |
| 284 | { |
| 285 | char header[0x210]; |
| 286 | int ret; |
| 287 | |
| 288 | /* first unmount any loaded disc */ |
| 289 | cdd_unload(); |
| 290 | |
| 291 | /* genplus parses cue here, in PD we use our own parser */ |
| 292 | ret = load_cd_image(filename, &type); |
| 293 | if (ret != 0) |
| 294 | return ret; |
| 295 | |
| 296 | /* read first 16 bytes */ |
| 297 | pm_read(header, 0x10, cdd.toc.tracks[0].fd); |
| 298 | |
| 299 | /* look for valid CD image ID string */ |
| 300 | if (memcmp("SEGADISCSYSTEM", header, 14)) |
| 301 | { |
| 302 | /* if not found, read next 16 bytes */ |
| 303 | pm_read(header, 0x10, cdd.toc.tracks[0].fd); |
| 304 | |
| 305 | /* look again for valid CD image ID string */ |
| 306 | if (memcmp("SEGADISCSYSTEM", header, 14)) |
| 307 | { |
| 308 | elprintf(EL_STATUS|EL_ANOMALY, "cd: bad cd image?"); |
| 309 | /* assume bin without security code */ |
| 310 | } |
| 311 | |
| 312 | /* BIN format (2352 bytes data blocks) */ |
| 313 | cdd.sectorSize = 2352; |
| 314 | } |
| 315 | else |
| 316 | { |
| 317 | /* ISO format (2048 bytes data blocks) */ |
| 318 | cdd.sectorSize = 2048; |
| 319 | } |
| 320 | |
| 321 | ret = (type == CT_BIN) ? 2352 : 2048; |
| 322 | if (ret != cdd.sectorSize) |
| 323 | elprintf(EL_STATUS|EL_ANOMALY, "cd: type detection mismatch"); |
| 324 | |
| 325 | /* read CD image header + security code */ |
| 326 | pm_read(header + 0x10, 0x200, cdd.toc.tracks[0].fd); |
| 327 | |
| 328 | /* Simulate audio tracks if none found */ |
| 329 | if (cdd.toc.last == 1) |
| 330 | { |
| 331 | /* Some games require exact TOC infos */ |
| 332 | if (strstr(header + 0x180,"T-95035") != NULL) |
| 333 | { |
| 334 | /* Snatcher */ |
| 335 | cdd.toc.last = cdd.toc.end = 0; |
| 336 | do |
| 337 | { |
| 338 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
| 339 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_snatcher[cdd.toc.last]; |
| 340 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
| 341 | cdd.toc.last++; |
| 342 | } |
| 343 | while (cdd.toc.last < 21); |
| 344 | } |
| 345 | else if (strstr(header + 0x180,"T-127015") != NULL) |
| 346 | { |
| 347 | /* Lunar - The Silver Star */ |
| 348 | cdd.toc.last = cdd.toc.end = 0; |
| 349 | do |
| 350 | { |
| 351 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
| 352 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_lunar[cdd.toc.last]; |
| 353 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
| 354 | cdd.toc.last++; |
| 355 | } |
| 356 | while (cdd.toc.last < 52); |
| 357 | } |
| 358 | else if (strstr(header + 0x180,"T-113045") != NULL) |
| 359 | { |
| 360 | /* Shadow of the Beast II */ |
| 361 | cdd.toc.last = cdd.toc.end = 0; |
| 362 | do |
| 363 | { |
| 364 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
| 365 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_shadow[cdd.toc.last]; |
| 366 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
| 367 | cdd.toc.last++; |
| 368 | } |
| 369 | while (cdd.toc.last < 15); |
| 370 | } |
| 371 | else if (strstr(header + 0x180,"T-143025") != NULL) |
| 372 | { |
| 373 | /* Dungeon Explorer */ |
| 374 | cdd.toc.last = cdd.toc.end = 0; |
| 375 | do |
| 376 | { |
| 377 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
| 378 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_dungeon[cdd.toc.last]; |
| 379 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
| 380 | cdd.toc.last++; |
| 381 | } |
| 382 | while (cdd.toc.last < 13); |
| 383 | } |
| 384 | else if (strstr(header + 0x180,"MK-4410") != NULL) |
| 385 | { |
| 386 | /* Final Fight CD (USA, Europe) */ |
| 387 | cdd.toc.last = cdd.toc.end = 0; |
| 388 | do |
| 389 | { |
| 390 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
| 391 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_ffight[cdd.toc.last]; |
| 392 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
| 393 | cdd.toc.last++; |
| 394 | } |
| 395 | while (cdd.toc.last < 26); |
| 396 | } |
| 397 | else if (strstr(header + 0x180,"G-6013") != NULL) |
| 398 | { |
| 399 | /* Final Fight CD (Japan) */ |
| 400 | cdd.toc.last = cdd.toc.end = 0; |
| 401 | do |
| 402 | { |
| 403 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
| 404 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_ffightj[cdd.toc.last]; |
| 405 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
| 406 | cdd.toc.last++; |
| 407 | } |
| 408 | while (cdd.toc.last < 29); |
| 409 | } |
| 410 | #if 0 |
| 411 | else |
| 412 | { |
| 413 | /* default TOC (99 tracks & 2s per audio tracks) */ |
| 414 | do |
| 415 | { |
| 416 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end + 2*75; |
| 417 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + 2*75; |
| 418 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
| 419 | cdd.toc.last++; |
| 420 | } |
| 421 | while ((cdd.toc.last < 99) && (cdd.toc.end < 56*60*75)); |
| 422 | } |
| 423 | #endif |
| 424 | } |
| 425 | |
| 426 | /* Lead-out */ |
| 427 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
| 428 | |
| 429 | /* CD loaded */ |
| 430 | cdd.loaded = 1; |
| 431 | |
| 432 | /* disc not scanned yet */ |
| 433 | cdd.status = NO_DISC; |
| 434 | |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | int cdd_unload(void) |
| 439 | { |
| 440 | int was_loaded = cdd.loaded; |
| 441 | |
| 442 | if (cdd.loaded) |
| 443 | { |
| 444 | int i; |
| 445 | |
| 446 | /* close CD tracks */ |
| 447 | if (cdd.toc.tracks[0].fd) |
| 448 | { |
| 449 | pm_close(cdd.toc.tracks[0].fd); |
| 450 | cdd.toc.tracks[0].fd = NULL; |
| 451 | } |
| 452 | |
| 453 | for (i = 1; i < cdd.toc.last; i++) |
| 454 | { |
| 455 | #ifdef USE_LIBTREMOR |
| 456 | if (cdd.toc.tracks[i].vf.datasource) |
| 457 | { |
| 458 | /* close VORBIS file (if still opened) */ |
| 459 | ov_clear(&cdd.toc.tracks[i].vf); |
| 460 | } |
| 461 | else |
| 462 | #endif |
| 463 | if (cdd.toc.tracks[i].fd) |
| 464 | { |
| 465 | /* close file */ |
| 466 | if (Pico_mcd->cdda_type == CT_MP3) |
| 467 | fclose(cdd.toc.tracks[i].fd); |
| 468 | else |
| 469 | pm_close(cdd.toc.tracks[0].fd); |
| 470 | |
| 471 | /* detect single file images */ |
| 472 | if (cdd.toc.tracks[i+1].fd == cdd.toc.tracks[i].fd) |
| 473 | { |
| 474 | /* exit loop */ |
| 475 | i = cdd.toc.last; |
| 476 | } |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | /* CD unloaded */ |
| 481 | cdd.loaded = 0; |
| 482 | |
| 483 | if (cdd.status != CD_OPEN) |
| 484 | cdd.status = NO_DISC; |
| 485 | } |
| 486 | |
| 487 | /* reset TOC */ |
| 488 | memset(&cdd.toc, 0x00, sizeof(cdd.toc)); |
| 489 | |
| 490 | /* unknown CD image file format */ |
| 491 | cdd.sectorSize = 0; |
| 492 | |
| 493 | return was_loaded; |
| 494 | } |
| 495 | |
| 496 | void cdd_read_data(uint8 *dst) |
| 497 | { |
| 498 | /* only read DATA track sectors */ |
| 499 | if ((cdd.lba >= 0) && (cdd.lba < cdd.toc.tracks[0].end)) |
| 500 | { |
| 501 | /* BIN format ? */ |
| 502 | if (cdd.sectorSize == 2352) |
| 503 | { |
| 504 | /* skip 16-byte header */ |
| 505 | pm_seek(cdd.toc.tracks[0].fd, cdd.lba * 2352 + 16, SEEK_SET); |
| 506 | } |
| 507 | |
| 508 | /* read sector data (Mode 1 = 2048 bytes) */ |
| 509 | pm_read(dst, 2048, cdd.toc.tracks[0].fd); |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | #if 0 |
| 514 | void cdd_read_audio(unsigned int samples) |
| 515 | { |
| 516 | /* previous audio outputs */ |
| 517 | int16 l = cdd.audio[0]; |
| 518 | int16 r = cdd.audio[1]; |
| 519 | |
| 520 | /* get number of internal clocks (samples) needed */ |
| 521 | samples = blip_clocks_needed(blip[0], samples); |
| 522 | |
| 523 | /* audio track playing ? */ |
| 524 | if (!Pico_mcd->s68k_regs[0x36+0] && cdd.toc.tracks[cdd.index].fd) |
| 525 | { |
| 526 | int i, mul, delta; |
| 527 | |
| 528 | /* current CD-DA fader volume */ |
| 529 | int curVol = cdd.volume; |
| 530 | |
| 531 | /* CD-DA fader volume setup (0-1024) */ |
| 532 | int endVol = Pico_mcd->regs[0x34>>1].w >> 4; |
| 533 | |
| 534 | /* read samples from current block */ |
| 535 | #ifdef USE_LIBTREMOR |
| 536 | if (cdd.toc.tracks[cdd.index].vf.datasource) |
| 537 | { |
| 538 | int len, done = 0; |
| 539 | int16 *ptr = (int16 *) (cdc.ram); |
| 540 | samples = samples * 4; |
| 541 | while (done < samples) |
| 542 | { |
| 543 | len = ov_read(&cdd.toc.tracks[cdd.index].vf, (char *)(cdc.ram + done), samples - done, 0); |
| 544 | if (len <= 0) |
| 545 | { |
| 546 | done = samples; |
| 547 | break; |
| 548 | } |
| 549 | done += len; |
| 550 | } |
| 551 | samples = done / 4; |
| 552 | |
| 553 | /* process 16-bit (host-endian) stereo samples */ |
| 554 | for (i=0; i<samples; i++) |
| 555 | { |
| 556 | /* CD-DA fader multiplier (cf. LC7883 datasheet) */ |
| 557 | /* (MIN) 0,1,2,3,4,8,12,16,20...,1020,1024 (MAX) */ |
| 558 | mul = (curVol & 0x7fc) ? (curVol & 0x7fc) : (curVol & 0x03); |
| 559 | |
| 560 | /* left channel */ |
| 561 | delta = ((ptr[0] * mul) / 1024) - l; |
| 562 | ptr++; |
| 563 | l += delta; |
| 564 | blip_add_delta_fast(blip[0], i, delta); |
| 565 | |
| 566 | /* right channel */ |
| 567 | delta = ((ptr[0] * mul) / 1024) - r; |
| 568 | ptr++; |
| 569 | r += delta; |
| 570 | blip_add_delta_fast(blip[1], i, delta); |
| 571 | |
| 572 | /* update CD-DA fader volume (one step/sample) */ |
| 573 | if (curVol < endVol) |
| 574 | { |
| 575 | /* fade-in */ |
| 576 | curVol++; |
| 577 | } |
| 578 | else if (curVol > endVol) |
| 579 | { |
| 580 | /* fade-out */ |
| 581 | curVol--; |
| 582 | } |
| 583 | else if (!curVol) |
| 584 | { |
| 585 | /* audio will remain muted until next setup */ |
| 586 | break; |
| 587 | } |
| 588 | } |
| 589 | } |
| 590 | else |
| 591 | #endif |
| 592 | { |
| 593 | #ifdef LSB_FIRST |
| 594 | int16 *ptr = (int16 *) (cdc.ram); |
| 595 | #else |
| 596 | uint8 *ptr = cdc.ram; |
| 597 | #endif |
| 598 | fread(cdc.ram, 1, samples * 4, cdd.toc.tracks[cdd.index].fd); |
| 599 | |
| 600 | /* process 16-bit (little-endian) stereo samples */ |
| 601 | for (i=0; i<samples; i++) |
| 602 | { |
| 603 | /* CD-DA fader multiplier (cf. LC7883 datasheet) */ |
| 604 | /* (MIN) 0,1,2,3,4,8,12,16,20...,1020,1024 (MAX) */ |
| 605 | mul = (curVol & 0x7fc) ? (curVol & 0x7fc) : (curVol & 0x03); |
| 606 | |
| 607 | /* left channel */ |
| 608 | #ifdef LSB_FIRST |
| 609 | delta = ((ptr[0] * mul) / 1024) - l; |
| 610 | ptr++; |
| 611 | #else |
| 612 | delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - l; |
| 613 | ptr += 2; |
| 614 | #endif |
| 615 | l += delta; |
| 616 | blip_add_delta_fast(blip[0], i, delta); |
| 617 | |
| 618 | /* right channel */ |
| 619 | #ifdef LSB_FIRST |
| 620 | delta = ((ptr[0] * mul) / 1024) - r; |
| 621 | ptr++; |
| 622 | #else |
| 623 | delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - r; |
| 624 | ptr += 2; |
| 625 | #endif |
| 626 | r += delta; |
| 627 | blip_add_delta_fast(blip[1], i, delta); |
| 628 | |
| 629 | /* update CD-DA fader volume (one step/sample) */ |
| 630 | if (curVol < endVol) |
| 631 | { |
| 632 | /* fade-in */ |
| 633 | curVol++; |
| 634 | } |
| 635 | else if (curVol > endVol) |
| 636 | { |
| 637 | /* fade-out */ |
| 638 | curVol--; |
| 639 | } |
| 640 | else if (!curVol) |
| 641 | { |
| 642 | /* audio will remain muted until next setup */ |
| 643 | break; |
| 644 | } |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | /* save current CD-DA fader volume */ |
| 649 | cdd.volume = curVol; |
| 650 | |
| 651 | /* save last audio output for next frame */ |
| 652 | cdd.audio[0] = l; |
| 653 | cdd.audio[1] = r; |
| 654 | } |
| 655 | else |
| 656 | { |
| 657 | /* no audio output */ |
| 658 | if (l) blip_add_delta_fast(blip[0], 0, -l); |
| 659 | if (r) blip_add_delta_fast(blip[1], 0, -r); |
| 660 | |
| 661 | /* save audio output for next frame */ |
| 662 | cdd.audio[0] = 0; |
| 663 | cdd.audio[1] = 0; |
| 664 | } |
| 665 | |
| 666 | /* end of Blip Buffer timeframe */ |
| 667 | blip_end_frame(blip[0], samples); |
| 668 | blip_end_frame(blip[1], samples); |
| 669 | } |
| 670 | #endif |
| 671 | |
| 672 | |
| 673 | void cdd_update(void) |
| 674 | { |
| 675 | #ifdef LOG_CDD |
| 676 |