274fcc35 |
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" |
15ca7152 |
41 | #include "cd_parse.h" |
274fcc35 |
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 | |
02ff0254 |
52 | #define is_audio(index) \ |
53 | (cdd.toc.tracks[index].type & CT_AUDIO) |
54 | |
274fcc35 |
55 | /* BCD conversion lookup tables */ |
56 | static const uint8 lut_BCD_8[100] = |
57 | { |
58 | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, |
59 | 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, |
60 | 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, |
61 | 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, |
62 | 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, |
63 | 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, |
64 | 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, |
65 | 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, |
66 | 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, |
67 | 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, |
68 | }; |
69 | |
70 | static const uint16 lut_BCD_16[100] = |
71 | { |
72 | 0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, |
73 | 0x0100, 0x0101, 0x0102, 0x0103, 0x0104, 0x0105, 0x0106, 0x0107, 0x0108, 0x0109, |
74 | 0x0200, 0x0201, 0x0202, 0x0203, 0x0204, 0x0205, 0x0206, 0x0207, 0x0208, 0x0209, |
75 | 0x0300, 0x0301, 0x0302, 0x0303, 0x0304, 0x0305, 0x0306, 0x0307, 0x0308, 0x0309, |
76 | 0x0400, 0x0401, 0x0402, 0x0403, 0x0404, 0x0405, 0x0406, 0x0407, 0x0408, 0x0409, |
77 | 0x0500, 0x0501, 0x0502, 0x0503, 0x0504, 0x0505, 0x0506, 0x0507, 0x0508, 0x0509, |
78 | 0x0600, 0x0601, 0x0602, 0x0603, 0x0604, 0x0605, 0x0606, 0x0607, 0x0608, 0x0609, |
79 | 0x0700, 0x0701, 0x0702, 0x0703, 0x0704, 0x0705, 0x0706, 0x0707, 0x0708, 0x0709, |
80 | 0x0800, 0x0801, 0x0802, 0x0803, 0x0804, 0x0805, 0x0806, 0x0807, 0x0808, 0x0809, |
81 | 0x0900, 0x0901, 0x0902, 0x0903, 0x0904, 0x0905, 0x0906, 0x0907, 0x0908, 0x0909, |
82 | }; |
83 | |
84 | /* pre-build TOC */ |
85 | static const uint16 toc_snatcher[21] = |
86 | { |
87 | 56014, 495, 10120, 20555, 1580, 5417, 12502, 16090, 6553, 9681, |
88 | 8148, 20228, 8622, 6142, 5858, 1287, 7424, 3535, 31697, 2485, |
89 | 31380 |
90 | }; |
91 | |
92 | static const uint16 toc_lunar[52] = |
93 | { |
94 | 5422, 1057, 7932, 5401, 6380, 6592, 5862, 5937, 5478, 5870, |
95 | 6673, 6613, 6429, 4996, 4977, 5657, 3720, 5892, 3140, 3263, |
96 | 6351, 5187, 3249, 1464, 1596, 1750, 1751, 6599, 4578, 5205, |
97 | 1550, 1827, 2328, 1346, 1569, 1613, 7199, 4928, 1656, 2549, |
98 | 1875, 3901, 1850, 2399, 2028, 1724, 4889, 14551, 1184, 2132, |
99 | 685, 3167 |
100 | }; |
101 | |
102 | static const uint32 toc_shadow[15] = |
103 | { |
104 | 10226, 70054, 11100, 12532, 12444, 11923, 10059, 10167, 10138, 13792, |
105 | 11637, 2547, 2521, 3856, 900 |
106 | }; |
107 | |
108 | static const uint32 toc_dungeon[13] = |
109 | { |
110 | 2250, 22950, 16350, 24900, 13875, 19950, 13800, 15375, 17400, 17100, |
111 | 3325, 6825, 25275 |
112 | }; |
113 | |
114 | static const uint32 toc_ffight[26] = |
115 | { |
116 | 11994, 9742, 10136, 9685, 9553, 14588, 9430, 8721, 9975, 9764, |
117 | 9704, 12796, 585, 754, 951, 624, 9047, 1068, 817, 9191, 1024, |
118 | 14562, 10320, 8627, 3795, 3047 |
119 | }; |
120 | |
121 | static const uint32 toc_ffightj[29] = |
122 | { |
123 | 11994, 9752, 10119, 9690, 9567, 14575, 9431, 8731, 9965, 9763, |
124 | 9716, 12791, 579, 751, 958, 630, 9050, 1052, 825, 9193, 1026, |
125 | 14553, 9834, 10542, 1699, 1792, 1781, 3783, 3052 |
126 | }; |
127 | |
ba11a481 |
128 | #if 0 |
274fcc35 |
129 | /* supported WAVE file header (16-bit stereo samples @44.1kHz) */ |
130 | static const unsigned char waveHeader[32] = |
131 | { |
132 | 0x57,0x41,0x56,0x45,0x66,0x6d,0x74,0x20,0x10,0x00,0x00,0x00,0x01,0x00,0x02,0x00, |
133 | 0x44,0xac,0x00,0x00,0x10,0xb1,0x02,0x00,0x04,0x00,0x10,0x00,0x64,0x61,0x74,0x61 |
134 | }; |
ba11a481 |
135 | #endif |
274fcc35 |
136 | |
137 | #ifdef USE_LIBTREMOR |
138 | #ifdef DISABLE_MANY_OGG_OPEN_FILES |
139 | static void ogg_free(int i) |
140 | { |
141 | /* clear OGG file descriptor to prevent file from being closed */ |
142 | cdd.toc.tracks[i].vf.datasource = NULL; |
143 | |
144 | /* close VORBIS file structure */ |
145 | ov_clear(&cdd.toc.tracks[i].vf); |
146 | |
147 | /* indicates that the track is a seekable VORBIS file */ |
148 | cdd.toc.tracks[i].vf.seekable = 1; |
149 | |
150 | /* reset file reading position */ |
151 | fseek(cdd.toc.tracks[i].fd, 0, SEEK_SET); |
152 | } |
153 | #endif |
154 | #endif |
155 | |
156 | void cdd_reset(void) |
157 | { |
158 | /* reset cycle counter */ |
159 | cdd.cycles = 0; |
160 | |
161 | /* reset drive access latency */ |
162 | cdd.latency = 0; |
163 | |
164 | /* reset track index */ |
ce5c904a |
165 | cdd.index = -1; |
274fcc35 |
166 | |
167 | /* reset logical block address */ |
168 | cdd.lba = 0; |
169 | |
170 | /* reset status */ |
7b3ddc11 |
171 | cdd.status = NO_DISC; |
172 | |
274fcc35 |
173 | /* reset CD-DA fader (full volume) */ |
174 | cdd.volume = 0x400; |
175 | |
176 | /* clear CD-DA output */ |
177 | cdd.audio[0] = cdd.audio[1] = 0; |
178 | } |
179 | |
180 | /* FIXME: use cdd_read_audio() instead */ |
181 | static void cdd_change_track(int index, int lba) |
182 | { |
183 | int i, base, lba_offset, lb_len; |
184 | |
4aaedc89 |
185 | for (i = index; i >= 0; i--) |
274fcc35 |
186 | if (cdd.toc.tracks[i].fd != NULL) |
187 | break; |
188 | |
189 | Pico_mcd->cdda_stream = cdd.toc.tracks[i].fd; |
190 | base = cdd.toc.tracks[index].offset; |
191 | lba_offset = lba - cdd.toc.tracks[index].start; |
192 | lb_len = cdd.toc.tracks[index].end - cdd.toc.tracks[index].start; |
193 | |
194 | elprintf(EL_CD, "play #%d lba %d base %d", index, lba, base); |
195 | |
196 | cdda_start_play(base, lba_offset, lb_len); |
197 | } |
198 | |
44479027 |
199 | static off_t read_pos = -1; |
274fcc35 |
200 | |
44479027 |
201 | void cdd_seek(int index, int lba) |
274fcc35 |
202 | { |
44479027 |
203 | int aindex = (index < 0 ? -index : index); |
274fcc35 |
204 | |
205 | #ifdef USE_LIBTREMOR |
206 | #ifdef DISABLE_MANY_OGG_OPEN_FILES |
44479027 |
207 | /* check if track index has changed */ |
208 | if (index != cdd.index) |
274fcc35 |
209 | { |
44479027 |
210 | /* close previous track VORBIS file structure to save memory */ |
211 | if (cdd.index >= 0 && cdd.toc.tracks[cdd.index].vf.datasource) |
212 | { |
213 | ogg_free(cdd.index); |
214 | } |
215 | |
216 | /* open current track VORBIS file */ |
217 | if (cdd.toc.tracks[aindex].vf.seekable) |
218 | { |
219 | ov_open(cdd.toc.tracks[aindex].fd,&cdd.toc.tracks[aindex].vf,0,0); |
220 | } |
274fcc35 |
221 | } |
222 | #endif |
223 | #endif |
224 | |
44479027 |
225 | /* update current track index and LBA */ |
226 | cdd.index = aindex; |
227 | cdd.lba = lba; |
274fcc35 |
228 | |
44479027 |
229 | /* stay within track limits when seeking files */ |
274fcc35 |
230 | if (lba < cdd.toc.tracks[cdd.index].start) |
231 | { |
232 | lba = cdd.toc.tracks[cdd.index].start; |
233 | } |
234 | |
44479027 |
235 | /* seek to current block */ |
02ff0254 |
236 | if (!is_audio(cdd.index)) |
274fcc35 |
237 | { |
238 | /* DATA track */ |
44479027 |
239 | read_pos = lba * cdd.sectorSize; |
240 | pm_seek(cdd.toc.tracks[cdd.index].fd, read_pos, SEEK_SET); |
274fcc35 |
241 | } |
242 | #ifdef USE_LIBTREMOR |
243 | else if (cdd.toc.tracks[cdd.index].vf.seekable) |
244 | { |
274fcc35 |
245 | /* VORBIS AUDIO track */ |
246 | ov_pcm_seek(&cdd.toc.tracks[cdd.index].vf, (lba - cdd.toc.tracks[cdd.index].start) * 588 - cdd.toc.tracks[cdd.index].offset); |
247 | } |
248 | #endif |
249 | #if 0 |
250 | else if (cdd.toc.tracks[cdd.index].fd) |
251 | { |
252 | /* PCM AUDIO track */ |
253 | fseek(cdd.toc.tracks[cdd.index].fd, (lba * 2352) - cdd.toc.tracks[cdd.index].offset, SEEK_SET); |
254 | } |
255 | #else |
256 | else |
257 | { |
258 | cdd_change_track(cdd.index, lba); |
259 | } |
260 | #endif |
44479027 |
261 | } |
262 | |
263 | int cdd_context_save(uint8 *state) |
264 | { |
265 | int bufferptr = 0; |
266 | |
267 | save_param(&cdd.cycles, sizeof(cdd.cycles)); |
268 | save_param(&cdd.latency, sizeof(cdd.latency)); |
269 | save_param(&cdd.index, sizeof(cdd.index)); |
270 | save_param(&cdd.lba, sizeof(cdd.lba)); |
271 | save_param(&cdd.scanOffset, sizeof(cdd.scanOffset)); |
272 | save_param(&cdd.volume, sizeof(cdd.volume)); |
273 | save_param(&cdd.status, sizeof(cdd.status)); |
274 | |
275 | return bufferptr; |
276 | } |
277 | |
278 | int cdd_context_load(uint8 *state) |
279 | { |
280 | int bufferptr = 0; |
281 | |
282 | load_param(&cdd.cycles, sizeof(cdd.cycles)); |
283 | load_param(&cdd.latency, sizeof(cdd.latency)); |
284 | load_param(&cdd.index, sizeof(cdd.index)); |
285 | load_param(&cdd.lba, sizeof(cdd.lba)); |
286 | load_param(&cdd.scanOffset, sizeof(cdd.scanOffset)); |
287 | load_param(&cdd.volume, sizeof(cdd.volume)); |
288 | load_param(&cdd.status, sizeof(cdd.status)); |
289 | |
290 | /* seek to current track position */ |
291 | cdd_seek(-cdd.index, cdd.lba); |
274fcc35 |
292 | |
293 | return bufferptr; |
294 | } |
295 | |
296 | int cdd_context_load_old(uint8 *state) |
297 | { |
298 | memcpy(&cdd.lba, state + 8, sizeof(cdd.lba)); |
44479027 |
299 | cdd_seek(-cdd.index, cdd.lba); |
300 | |
274fcc35 |
301 | return 12 * 4; |
302 | } |
303 | |
304 | int cdd_load(const char *filename, int type) |
305 | { |
306 | char header[0x210]; |
307 | int ret; |
308 | |
309 | /* first unmount any loaded disc */ |
310 | cdd_unload(); |
311 | |
312 | /* genplus parses cue here, in PD we use our own parser */ |
313 | ret = load_cd_image(filename, &type); |
314 | if (ret != 0) |
315 | return ret; |
316 | |
317 | /* read first 16 bytes */ |
318 | pm_read(header, 0x10, cdd.toc.tracks[0].fd); |
319 | |
320 | /* look for valid CD image ID string */ |
321 | if (memcmp("SEGADISCSYSTEM", header, 14)) |
322 | { |
323 | /* if not found, read next 16 bytes */ |
324 | pm_read(header, 0x10, cdd.toc.tracks[0].fd); |
325 | |
326 | /* look again for valid CD image ID string */ |
327 | if (memcmp("SEGADISCSYSTEM", header, 14)) |
328 | { |
329 | elprintf(EL_STATUS|EL_ANOMALY, "cd: bad cd image?"); |
330 | /* assume bin without security code */ |
331 | } |
332 | |
333 | /* BIN format (2352 bytes data blocks) */ |
334 | cdd.sectorSize = 2352; |
335 | } |
336 | else |
337 | { |
338 | /* ISO format (2048 bytes data blocks) */ |
339 | cdd.sectorSize = 2048; |
340 | } |
341 | |
02ff0254 |
342 | ret = (type == CT_ISO ? 2048 : 2352); |
274fcc35 |
343 | if (ret != cdd.sectorSize) |
344 | elprintf(EL_STATUS|EL_ANOMALY, "cd: type detection mismatch"); |
15ca7152 |
345 | pm_sectorsize(cdd.sectorSize, cdd.toc.tracks[0].fd); |
274fcc35 |
346 | |
347 | /* read CD image header + security code */ |
348 | pm_read(header + 0x10, 0x200, cdd.toc.tracks[0].fd); |
349 | |
350 | /* Simulate audio tracks if none found */ |
351 | if (cdd.toc.last == 1) |
352 | { |
353 | /* Some games require exact TOC infos */ |
354 | if (strstr(header + 0x180,"T-95035") != NULL) |
355 | { |
356 | /* Snatcher */ |
357 | cdd.toc.last = cdd.toc.end = 0; |
358 | do |
359 | { |
360 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
361 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_snatcher[cdd.toc.last]; |
362 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
363 | cdd.toc.last++; |
364 | } |
365 | while (cdd.toc.last < 21); |
366 | } |
367 | else if (strstr(header + 0x180,"T-127015") != NULL) |
368 | { |
369 | /* Lunar - The Silver Star */ |
370 | cdd.toc.last = cdd.toc.end = 0; |
371 | do |
372 | { |
373 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
374 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_lunar[cdd.toc.last]; |
375 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
376 | cdd.toc.last++; |
377 | } |
378 | while (cdd.toc.last < 52); |
379 | } |
380 | else if (strstr(header + 0x180,"T-113045") != NULL) |
381 | { |
382 | /* Shadow of the Beast II */ |
383 | cdd.toc.last = cdd.toc.end = 0; |
384 | do |
385 | { |
386 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
387 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_shadow[cdd.toc.last]; |
388 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
389 | cdd.toc.last++; |
390 | } |
391 | while (cdd.toc.last < 15); |
392 | } |
393 | else if (strstr(header + 0x180,"T-143025") != NULL) |
394 | { |
395 | /* Dungeon Explorer */ |
396 | cdd.toc.last = cdd.toc.end = 0; |
397 | do |
398 | { |
399 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
400 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_dungeon[cdd.toc.last]; |
401 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
402 | cdd.toc.last++; |
403 | } |
404 | while (cdd.toc.last < 13); |
405 | } |
406 | else if (strstr(header + 0x180,"MK-4410") != NULL) |
407 | { |
408 | /* Final Fight CD (USA, Europe) */ |
409 | cdd.toc.last = cdd.toc.end = 0; |
410 | do |
411 | { |
412 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
413 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_ffight[cdd.toc.last]; |
414 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
415 | cdd.toc.last++; |
416 | } |
417 | while (cdd.toc.last < 26); |
418 | } |
419 | else if (strstr(header + 0x180,"G-6013") != NULL) |
420 | { |
421 | /* Final Fight CD (Japan) */ |
422 | cdd.toc.last = cdd.toc.end = 0; |
423 | do |
424 | { |
425 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
426 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + toc_ffightj[cdd.toc.last]; |
427 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
428 | cdd.toc.last++; |
429 | } |
430 | while (cdd.toc.last < 29); |
431 | } |
432 | #if 0 |
433 | else |
434 | { |
435 | /* default TOC (99 tracks & 2s per audio tracks) */ |
436 | do |
437 | { |
438 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end + 2*75; |
439 | cdd.toc.tracks[cdd.toc.last].end = cdd.toc.tracks[cdd.toc.last].start + 2*75; |
440 | cdd.toc.end = cdd.toc.tracks[cdd.toc.last].end; |
441 | cdd.toc.last++; |
442 | } |
443 | while ((cdd.toc.last < 99) && (cdd.toc.end < 56*60*75)); |
444 | } |
445 | #endif |
446 | } |
447 | |
448 | /* Lead-out */ |
449 | cdd.toc.tracks[cdd.toc.last].start = cdd.toc.end; |
450 | |
451 | /* CD loaded */ |
452 | cdd.loaded = 1; |
7b3ddc11 |
453 | |
454 | /* disc not scanned yet */ |
455 | cdd.status = NO_DISC; |
456 | |
274fcc35 |
457 | return 0; |
458 | } |
459 | |
460 | int cdd_unload(void) |
461 | { |
462 | int was_loaded = cdd.loaded; |
463 | |
464 | if (cdd.loaded) |
465 | { |
466 | int i; |
467 | |
7e77080f |
468 | /* stop audio streaming */ |
469 | Pico_mcd->cdda_stream = NULL; |
470 | |
274fcc35 |
471 | /* close CD tracks */ |
472 | if (cdd.toc.tracks[0].fd) |
473 | { |
474 | pm_close(cdd.toc.tracks[0].fd); |
475 | cdd.toc.tracks[0].fd = NULL; |
15ca7152 |
476 | if (cdd.toc.tracks[0].fname) |
ef3241d2 |
477 | free(cdd.toc.tracks[0].fname); |
15ca7152 |
478 | cdd.toc.tracks[0].fname = NULL; |
274fcc35 |
479 | } |
480 | |
481 | for (i = 1; i < cdd.toc.last; i++) |
482 | { |
483 | #ifdef USE_LIBTREMOR |
484 | if (cdd.toc.tracks[i].vf.datasource) |
485 | { |
486 | /* close VORBIS file (if still opened) */ |
487 | ov_clear(&cdd.toc.tracks[i].vf); |
488 | } |
489 | else |
490 | #endif |
491 | if (cdd.toc.tracks[i].fd) |
492 | { |
493 | /* close file */ |
494 | if (Pico_mcd->cdda_type == CT_MP3) |
495 | fclose(cdd.toc.tracks[i].fd); |
496 | else |
15ca7152 |
497 | pm_close(cdd.toc.tracks[i].fd); |
498 | cdd.toc.tracks[i].fd = NULL; |
499 | if (cdd.toc.tracks[i].fname) |
ef3241d2 |
500 | free(cdd.toc.tracks[i].fname); |
15ca7152 |
501 | cdd.toc.tracks[i].fname = NULL; |
274fcc35 |
502 | |
503 | /* detect single file images */ |
504 | if (cdd.toc.tracks[i+1].fd == cdd.toc.tracks[i].fd) |
505 | { |
506 | /* exit loop */ |
507 | i = cdd.toc.last; |
508 | } |
509 | } |
510 | } |
511 | |
512 | /* CD unloaded */ |
513 | cdd.loaded = 0; |
7b3ddc11 |
514 | |
515 | if (cdd.status != CD_OPEN) |
516 | cdd.status = NO_DISC; |
274fcc35 |
517 | } |
518 | |
519 | /* reset TOC */ |
520 | memset(&cdd.toc, 0x00, sizeof(cdd.toc)); |
521 | |
522 | /* unknown CD image file format */ |
523 | cdd.sectorSize = 0; |
524 | |
525 | return was_loaded; |
526 | } |
527 | |
528 | void cdd_read_data(uint8 *dst) |
529 | { |
530 | /* only read DATA track sectors */ |
44479027 |
531 | if (!is_audio(cdd.index) && (cdd.lba >= cdd.toc.tracks[cdd.index].start) && |
532 | (cdd.lba < cdd.toc.tracks[cdd.index].end)) |
274fcc35 |
533 | { |
44479027 |
534 | off_t pos; |
535 | |
274fcc35 |
536 | /* BIN format ? */ |
537 | if (cdd.sectorSize == 2352) |
538 | { |
539 | /* skip 16-byte header */ |
44479027 |
540 | pos = cdd.lba * 2352 + 16; |
541 | } |
542 | else |
543 | { |
544 | pos = cdd.lba * cdd.sectorSize; |
545 | } |
546 | |
547 | if (pos != read_pos) { |
548 | pm_seek(cdd.toc.tracks[cdd.index].fd, pos, SEEK_SET); |
549 | read_pos = pos; |
274fcc35 |
550 | } |
551 | |
552 | /* read sector data (Mode 1 = 2048 bytes) */ |
44479027 |
553 | read_pos += pm_read(dst, 2048, cdd.toc.tracks[cdd.index].fd); |
274fcc35 |
554 | } |
555 | } |
556 | |
557 | #if 0 |
558 | void cdd_read_audio(unsigned int samples) |
559 | { |
560 | /* previous audio outputs */ |
561 | int16 l = cdd.audio[0]; |
562 | int16 r = cdd.audio[1]; |
563 | |
564 | /* get number of internal clocks (samples) needed */ |
565 | samples = blip_clocks_needed(blip[0], samples); |
566 | |
567 | /* audio track playing ? */ |
f47d0a28 |
568 | if (!Pico_mcd->s68k_regs[0x36+0] && cdd.toc.tracks[cdd.index].fd) |
274fcc35 |
569 | { |
570 | int i, mul, delta; |
571 | |
572 | /* current CD-DA fader volume */ |
573 | int curVol = cdd.volume; |
574 | |
575 | /* CD-DA fader volume setup (0-1024) */ |
576 | int endVol = Pico_mcd->regs[0x34>>1].w >> 4; |
577 | |
578 | /* read samples from current block */ |
579 | #ifdef USE_LIBTREMOR |
580 | if (cdd.toc.tracks[cdd.index].vf.datasource) |
581 | { |
582 | int len, done = 0; |
583 | int16 *ptr = (int16 *) (cdc.ram); |
584 | samples = samples * 4; |
585 | while (done < samples) |
586 | { |
587 | len = ov_read(&cdd.toc.tracks[cdd.index].vf, (char *)(cdc.ram + done), samples - done, 0); |
588 | if (len <= 0) |
589 | { |
590 | done = samples; |
591 | break; |
592 | } |
593 | done += len; |
594 | } |
595 | samples = done / 4; |
596 | |
597 | /* process 16-bit (host-endian) stereo samples */ |
598 | for (i=0; i<samples; i++) |
599 | { |
600 | /* CD-DA fader multiplier (cf. LC7883 datasheet) */ |
601 | /* (MIN) 0,1,2,3,4,8,12,16,20...,1020,1024 (MAX) */ |
602 | mul = (curVol & 0x7fc) ? (curVol & 0x7fc) : (curVol & 0x03); |
603 | |
604 | /* left channel */ |
605 | delta = ((ptr[0] * mul) / 1024) - l; |
606 | ptr++; |
607 | l += delta; |
608 | blip_add_delta_fast(blip[0], i, delta); |
609 | |
610 | /* right channel */ |
611 | delta = ((ptr[0] * mul) / 1024) - r; |
612 | ptr++; |
613 | r += delta; |
614 | blip_add_delta_fast(blip[1], i, delta); |
615 | |
616 | /* update CD-DA fader volume (one step/sample) */ |
617 | if (curVol < endVol) |
618 | { |
619 | /* fade-in */ |
620 | curVol++; |
621 | } |
622 | else if (curVol > endVol) |
623 | { |
624 | /* fade-out */ |
625 | curVol--; |
626 | } |
627 | else if (!curVol) |
628 | { |
629 | /* audio will remain muted until next setup */ |
630 | break; |
631 | } |
632 | } |
633 | } |
634 | else |
635 | #endif |
636 | { |
637 | #ifdef LSB_FIRST |
638 | int16 *ptr = (int16 *) (cdc.ram); |
639 | #else |
640 | uint8 *ptr = cdc.ram; |
641 | #endif |
642 | fread(cdc.ram, 1, samples * 4, cdd.toc.tracks[cdd.index].fd); |
643 | |
644 | /* process 16-bit (little-endian) stereo samples */ |
645 | for (i=0; i<samples; i++) |
646 | { |
647 | /* CD-DA fader multiplier (cf. LC7883 datasheet) */ |
648 | /* (MIN) 0,1,2,3,4,8,12,16,20...,1020,1024 (MAX) */ |
649 | mul = (curVol & 0x7fc) ? (curVol & 0x7fc) : (curVol & 0x03); |
650 | |
651 | /* left channel */ |
652 | #ifdef LSB_FIRST |
653 | delta = ((ptr[0] * mul) / 1024) - l; |
654 | ptr++; |
655 | #else |
656 | delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - l; |
657 | ptr += 2; |
658 | #endif |
659 | l += delta; |
660 | blip_add_delta_fast(blip[0], i, delta); |
661 | |
662 | /* right channel */ |
663 | #ifdef LSB_FIRST |
664 | delta = ((ptr[0] * mul) / 1024) - r; |
665 | ptr++; |
666 | #else |
667 | delta = (((int16)((ptr[0] + ptr[1]*256)) * mul) / 1024) - r; |
668 | ptr += 2; |
669 | #endif |
670 | r += delta; |
671 | blip_add_delta_fast(blip[1], i, delta); |
672 | |
673 | /* update CD-DA fader volume (one step/sample) */ |
674 | if (curVol < endVol) |
675 | { |
676 | /* fade-in */ |
677 | curVol++; |
678 | } |
679 | else if (curVol > endVol) |
680 | { |
681 | /* fade-out */ |
682 | curVol--; |
683 | } |
684 | else if (!curVol) |
685 | { |
686 | /* audio will remain muted until next setup */ |
687 | break; |
688 | } |
689 | } |
690 | } |
691 | |
692 | /* save current CD-DA fader volume */ |
693 | cdd.volume = curVol; |
694 | |
695 | /* save last audio output for next frame */ |
696 | cdd.audio[0] = l; |
697 | cdd.audio[1] = r; |
698 | } |
699 | else |
700 | { |
701 | /* no audio output */ |
702 | if (l) blip_add_delta_fast(blip[0], 0, -l); |
703 | if (r) blip_add_delta_fast(blip[1], 0, -r); |
704 | |
705 | /* save audio output for next frame */ |
706 | cdd.audio[0] = 0; |
707 | cdd.audio[1] = 0; |
708 | } |
709 | |
710 | /* end of Blip Buffer timeframe */ |
711 | blip_end_frame(blip[0], samples); |
712 | blip_end_frame(blip[1], samples); |
713 | } |
714 | #endif |
715 | |
716 | |
717 | void cdd_update(void) |
718 | { |
719 | #ifdef LOG_CDD |
720 |