1 | // jar_mod.h - v0.01 - public domain C0 - Joshua Reisenauer |
2 | // |
3 | // HISTORY: |
4 | // |
5 | // v0.01 2016-03-12 Setup |
6 | // |
7 | // |
8 | // USAGE: |
9 | // |
10 | // In ONE source file, put: |
11 | // |
12 | // #define JAR_MOD_IMPLEMENTATION |
13 | // #include "jar_mod.h" |
14 | // |
15 | // Other source files should just include jar_mod.h |
16 | // |
17 | // SAMPLE CODE: |
18 | // jar_mod_context_t modctx; |
19 | // short samplebuff[4096]; |
20 | // bool bufferFull = false; |
21 | // int intro_load(void) |
22 | // { |
23 | // jar_mod_init(&modctx); |
24 | // jar_mod_load_file(&modctx, "file.mod"); |
25 | // return 1; |
26 | // } |
27 | // int intro_unload(void) |
28 | // { |
29 | // jar_mod_unload(&modctx); |
30 | // return 1; |
31 | // } |
32 | // int intro_tick(long counter) |
33 | // { |
34 | // if(!bufferFull) |
35 | // { |
36 | // jar_mod_fillbuffer(&modctx, samplebuff, 4096, 0); |
37 | // bufferFull=true; |
38 | // } |
39 | // if(IsKeyDown(KEY_ENTER)) |
40 | // return 1; |
41 | // return 0; |
42 | // } |
43 | // |
44 | // |
45 | // LISCENSE: |
46 | // |
47 | // Written by: Jean-François DEL NERO (http://hxc2001.com/) <Email : jeanfrancoisdelnero <> free.fr> |
48 | // Adapted to jar_mod by: Joshua Adam Reisenauer <kd7tck@gmail.com> |
49 | // This program is free software. It comes without any warranty, to the |
50 | // extent permitted by applicable law. You can redistribute it and/or |
51 | // modify it under the terms of the Do What The Fuck You Want To Public |
52 | // License, Version 2, as published by Sam Hocevar. See |
53 | // http://sam.zoy.org/wtfpl/COPYING for more details. |
54 | /////////////////////////////////////////////////////////////////////////////////// |
55 | // HxCMOD Core API: |
56 | // ------------------------------------------- |
57 | // int jar_mod_init(jar_mod_context_t * modctx) |
58 | // |
59 | // - Initialize the jar_mod_context_t buffer. Must be called before doing anything else. |
60 | // Return 1 if success. 0 in case of error. |
61 | // ------------------------------------------- |
62 | // mulong jar_mod_load_file(jar_mod_context_t * modctx, const char* filename) |
63 | // |
64 | // - "Load" a MOD from file, context must already be initialized. |
65 | // Return size of file in bytes. |
66 | // ------------------------------------------- |
67 | // void jar_mod_fillbuffer( jar_mod_context_t * modctx, short * outbuffer, unsigned long nbsample, jar_mod_tracker_buffer_state * trkbuf ) |
68 | // |
69 | // - Generate and return the next samples chunk to outbuffer. |
70 | // nbsample specify the number of stereo 16bits samples you want. |
71 | // The output format is by default signed 48000Hz 16-bit Stereo PCM samples, otherwise it is changed with jar_mod_setcfg(). |
72 | // The output buffer size in bytes must be equal to ( nbsample * 2 * channels ). |
73 | // The optional trkbuf parameter can be used to get detailed status of the player. Put NULL/0 is unused. |
74 | // ------------------------------------------- |
75 | // void jar_mod_unload( jar_mod_context_t * modctx ) |
76 | // - "Unload" / clear the player status. |
77 | // ------------------------------------------- |
78 | /////////////////////////////////////////////////////////////////////////////////// |
79 | |
80 | |
81 | #ifndef INCLUDE_JAR_MOD_H |
82 | #define INCLUDE_JAR_MOD_H |
83 | |
84 | // Allow custom memory allocators |
85 | #ifndef JARMOD_MALLOC |
86 | #define JARMOD_MALLOC(sz) malloc(sz) |
87 | #endif |
88 | #ifndef JARMOD_FREE |
89 | #define JARMOD_FREE(p) free(p) |
90 | #endif |
91 | |
92 | |
93 | // Basic type |
94 | typedef unsigned char muchar; |
95 | typedef unsigned short muint; |
96 | typedef short mint; |
97 | typedef unsigned long mulong; |
98 | |
99 | #define NUMMAXCHANNELS 32 |
100 | #define MAXNOTES 12*12 |
101 | #define DEFAULT_SAMPLE_RATE 48000 |
102 | // |
103 | // MOD file structures |
104 | // |
105 | |
106 | #pragma pack(1) |
107 | |
108 | typedef struct { |
109 | muchar name[22]; |
110 | muint length; |
111 | muchar finetune; |
112 | muchar volume; |
113 | muint reppnt; |
114 | muint replen; |
115 | } sample; |
116 | |
117 | typedef struct { |
118 | muchar sampperiod; |
119 | muchar period; |
120 | muchar sampeffect; |
121 | muchar effect; |
122 | } note; |
123 | |
124 | typedef struct { |
125 | muchar title[20]; |
126 | sample samples[31]; |
127 | muchar length; // length of tablepos |
128 | muchar protracker; |
129 | muchar patterntable[128]; |
130 | muchar signature[4]; |
131 | muchar speed; |
132 | } module; |
133 | |
134 | #pragma pack() |
135 | |
136 | // |
137 | // HxCMod Internal structures |
138 | // |
139 | typedef struct { |
140 | char* sampdata; |
141 | muint sampnum; |
142 | muint length; |
143 | muint reppnt; |
144 | muint replen; |
145 | mulong samppos; |
146 | muint period; |
147 | muchar volume; |
148 | mulong ticks; |
149 | muchar effect; |
150 | muchar parameffect; |
151 | muint effect_code; |
152 | mint decalperiod; |
153 | mint portaspeed; |
154 | mint portaperiod; |
155 | mint vibraperiod; |
156 | mint Arpperiods[3]; |
157 | muchar ArpIndex; |
158 | mint oldk; |
159 | muchar volumeslide; |
160 | muchar vibraparam; |
161 | muchar vibrapointeur; |
162 | muchar finetune; |
163 | muchar cut_param; |
164 | muint patternloopcnt; |
165 | muint patternloopstartpoint; |
166 | } channel; |
167 | |
168 | typedef struct { |
169 | module song; |
170 | char* sampledata[31]; |
171 | note* patterndata[128]; |
172 | |
173 | mulong playrate; |
174 | muint tablepos; |
175 | muint patternpos; |
176 | muint patterndelay; |
177 | muint jump_loop_effect; |
178 | muchar bpm; |
179 | mulong patternticks; |
180 | mulong patterntickse; |
181 | mulong patternticksaim; |
182 | mulong sampleticksconst; |
183 | mulong samplenb; |
184 | channel channels[NUMMAXCHANNELS]; |
185 | muint number_of_channels; |
186 | muint fullperiod[MAXNOTES * 8]; |
187 | muint mod_loaded; |
188 | mint last_r_sample; |
189 | mint last_l_sample; |
190 | mint stereo; |
191 | mint stereo_separation; |
192 | mint bits; |
193 | mint filter; |
194 | |
195 | muchar *modfile; // the raw mod file |
196 | mulong modfilesize; |
197 | muint loopcount; |
198 | } jar_mod_context_t; |
199 | |
200 | // |
201 | // Player states structures |
202 | // |
203 | typedef struct track_state_ |
204 | { |
205 | unsigned char instrument_number; |
206 | unsigned short cur_period; |
207 | unsigned char cur_volume; |
208 | unsigned short cur_effect; |
209 | unsigned short cur_parameffect; |
210 | }track_state; |
211 | |
212 | typedef struct tracker_state_ |
213 | { |
214 | int number_of_tracks; |
215 | int bpm; |
216 | int speed; |
217 | int cur_pattern; |
218 | int cur_pattern_pos; |
219 | int cur_pattern_table_pos; |
220 | unsigned int buf_index; |
221 | track_state tracks[32]; |
222 | }tracker_state; |
223 | |
224 | typedef struct tracker_state_instrument_ |
225 | { |
226 | char name[22]; |
227 | int active; |
228 | }tracker_state_instrument; |
229 | |
230 | typedef struct jar_mod_tracker_buffer_state_ |
231 | { |
232 | int nb_max_of_state; |
233 | int nb_of_state; |
234 | int cur_rd_index; |
235 | int sample_step; |
236 | char name[64]; |
237 | tracker_state_instrument instruments[31]; |
238 | tracker_state * track_state_buf; |
239 | }jar_mod_tracker_buffer_state; |
240 | |
241 | #ifdef __cplusplus |
242 | extern "C" { |
243 | #endif |
244 | |
245 | bool jar_mod_init(jar_mod_context_t * modctx); |
246 | bool jar_mod_setcfg(jar_mod_context_t * modctx, int samplerate, int bits, int stereo, int stereo_separation, int filter); |
247 | void jar_mod_fillbuffer(jar_mod_context_t * modctx, short * outbuffer, unsigned long nbsample, jar_mod_tracker_buffer_state * trkbuf); |
248 | void jar_mod_unload(jar_mod_context_t * modctx); |
249 | mulong jar_mod_load_file(jar_mod_context_t * modctx, const char* filename); |
250 | mulong jar_mod_current_samples(jar_mod_context_t * modctx); |
251 | mulong jar_mod_max_samples(jar_mod_context_t * modctx); |
252 | void jar_mod_seek_start(jar_mod_context_t * ctx); |
253 | |
254 | #ifdef __cplusplus |
255 | } |
256 | #endif |
257 | //-------------------------------------------------------------------- |
258 | |
259 | |
260 | |
261 | //------------------------------------------------------------------------------- |
262 | #ifdef JAR_MOD_IMPLEMENTATION |
263 | |
264 | #include <stdio.h> |
265 | #include <stdlib.h> |
266 | //#include <stdbool.h> |
267 | |
268 | // Effects list |
269 | #define EFFECT_ARPEGGIO 0x0 // Supported |
270 | #define EFFECT_PORTAMENTO_UP 0x1 // Supported |
271 | #define EFFECT_PORTAMENTO_DOWN 0x2 // Supported |
272 | #define EFFECT_TONE_PORTAMENTO 0x3 // Supported |
273 | #define EFFECT_VIBRATO 0x4 // Supported |
274 | #define EFFECT_VOLSLIDE_TONEPORTA 0x5 // Supported |
275 | #define EFFECT_VOLSLIDE_VIBRATO 0x6 // Supported |
276 | #define EFFECT_VOLSLIDE_TREMOLO 0x7 // - TO BE DONE - |
277 | #define EFFECT_SET_PANNING 0x8 // - TO BE DONE - |
278 | #define EFFECT_SET_OFFSET 0x9 // Supported |
279 | #define EFFECT_VOLUME_SLIDE 0xA // Supported |
280 | #define EFFECT_JUMP_POSITION 0xB // Supported |
281 | #define EFFECT_SET_VOLUME 0xC // Supported |
282 | #define EFFECT_PATTERN_BREAK 0xD // Supported |
283 | |
284 | #define EFFECT_EXTENDED 0xE |
285 | #define EFFECT_E_FINE_PORTA_UP 0x1 // Supported |
286 | #define EFFECT_E_FINE_PORTA_DOWN 0x2 // Supported |
287 | #define EFFECT_E_GLISSANDO_CTRL 0x3 // - TO BE DONE - |
288 | #define EFFECT_E_VIBRATO_WAVEFORM 0x4 // - TO BE DONE - |
289 | #define EFFECT_E_SET_FINETUNE 0x5 // - TO BE DONE - |
290 | #define EFFECT_E_PATTERN_LOOP 0x6 // Supported |
291 | #define EFFECT_E_TREMOLO_WAVEFORM 0x7 // - TO BE DONE - |
292 | #define EFFECT_E_SET_PANNING_2 0x8 // - TO BE DONE - |
293 | #define EFFECT_E_RETRIGGER_NOTE 0x9 // - TO BE DONE - |
294 | #define EFFECT_E_FINE_VOLSLIDE_UP 0xA // Supported |
295 | #define EFFECT_E_FINE_VOLSLIDE_DOWN 0xB // Supported |
296 | #define EFFECT_E_NOTE_CUT 0xC // Supported |
297 | #define EFFECT_E_NOTE_DELAY 0xD // - TO BE DONE - |
298 | #define EFFECT_E_PATTERN_DELAY 0xE // Supported |
299 | #define EFFECT_E_INVERT_LOOP 0xF // - TO BE DONE - |
300 | #define EFFECT_SET_SPEED 0xF0 // Supported |
301 | #define EFFECT_SET_TEMPO 0xF2 // Supported |
302 | |
303 | #define PERIOD_TABLE_LENGTH MAXNOTES |
304 | #define FULL_PERIOD_TABLE_LENGTH ( PERIOD_TABLE_LENGTH * 8 ) |
305 | |
306 | static const short periodtable[]= |
307 | { |
308 | 27392, 25856, 24384, 23040, 21696, 20480, 19328, 18240, 17216, 16256, 15360, 14496, |
309 | 13696, 12928, 12192, 11520, 10848, 10240, 9664, 9120, 8606, 8128, 7680, 7248, |
310 | 6848, 6464, 6096, 5760, 5424, 5120, 4832, 4560, 4304, 4064, 3840, 3624, |
311 | 3424, 3232, 3048, 2880, 2712, 2560, 2416, 2280, 2152, 2032, 1920, 1812, |
312 | 1712, 1616, 1524, 1440, 1356, 1280, 1208, 1140, 1076, 1016, 960, 906, |
313 | 856, 808, 762, 720, 678, 640, 604, 570, 538, 508, 480, 453, |
314 | 428, 404, 381, 360, 339, 320, 302, 285, 269, 254, 240, 226, |
315 | 214, 202, 190, 180, 170, 160, 151, 143, 135, 127, 120, 113, |
316 | 107, 101, 95, 90, 85, 80, 75, 71, 67, 63, 60, 56, |
317 | 53, 50, 47, 45, 42, 40, 37, 35, 33, 31, 30, 28, |
318 | 27, 25, 24, 22, 21, 20, 19, 18, 17, 16, 15, 14, |
319 | 13, 13, 12, 11, 11, 10, 9, 9, 8, 8, 7, 7 |
320 | }; |
321 | |
322 | static const short sintable[]={ |
323 | 0, 24, 49, 74, 97, 120, 141,161, |
324 | 180, 197, 212, 224, 235, 244, 250,253, |
325 | 255, 253, 250, 244, 235, 224, 212,197, |
326 | 180, 161, 141, 120, 97, 74, 49, 24 |
327 | }; |
328 | |
329 | typedef struct modtype_ |
330 | { |
331 | unsigned char signature[5]; |
332 | int numberofchannels; |
333 | }modtype; |
334 | |
335 | modtype modlist[]= |
336 | { |
337 | { "M!K!" ,4}, |
338 | { "M.K." ,4}, |
339 | { "FLT4" ,4}, |
340 | { "FLT8" ,8}, |
341 | { "4CHN" ,4}, |
342 | { "6CHN" ,6}, |
343 | { "8CHN" ,8}, |
344 | { "10CH" ,10}, |
345 | { "12CH" ,12}, |
346 | { "14CH" ,14}, |
347 | { "16CH" ,16}, |
348 | { "18CH" ,18}, |
349 | { "20CH" ,20}, |
350 | { "22CH" ,22}, |
351 | { "24CH" ,24}, |
352 | { "26CH" ,26}, |
353 | { "28CH" ,28}, |
354 | { "30CH" ,30}, |
355 | { "32CH" ,32}, |
356 | { "" ,0} |
357 | }; |
358 | |
359 | /////////////////////////////////////////////////////////////////////////////////// |
360 | |
361 | static void memcopy( void * dest, void *source, unsigned long size ) |
362 | { |
363 | unsigned long i; |
364 | unsigned char * d,*s; |
365 | |
366 | d=(unsigned char*)dest; |
367 | s=(unsigned char*)source; |
368 | for(i=0;i<size;i++) |
369 | { |
370 | d[i]=s[i]; |
371 | } |
372 | } |
373 | |
374 | static void memclear( void * dest, unsigned char value, unsigned long size ) |
375 | { |
376 | unsigned long i; |
377 | unsigned char * d; |
378 | |
379 | d=(unsigned char*)dest; |
380 | for(i=0;i<size;i++) |
381 | { |
382 | d[i]=value; |
383 | } |
384 | } |
385 | |
386 | static int memcompare( unsigned char * buf1, unsigned char * buf2, unsigned int size ) |
387 | { |
388 | unsigned int i; |
389 | |
390 | i = 0; |
391 | |
392 | while(i<size) |
393 | { |
394 | if(buf1[i] != buf2[i]) |
395 | { |
396 | return 0; |
397 | } |
398 | i++; |
399 | } |
400 | |
401 | return 1; |
402 | } |
403 | |
404 | static int getnote( jar_mod_context_t * mod, unsigned short period, int finetune ) |
405 | { |
406 | int i; |
407 | |
408 | for(i = 0; i < FULL_PERIOD_TABLE_LENGTH; i++) |
409 | { |
410 | if(period >= mod->fullperiod[i]) |
411 | { |
412 | return i; |
413 | } |
414 | } |
415 | |
416 | return MAXNOTES; |
417 | } |
418 | |
419 | static void worknote( note * nptr, channel * cptr, char t, jar_mod_context_t * mod ) |
420 | { |
421 | muint sample, period, effect, operiod; |
422 | muint curnote, arpnote; |
423 | |
424 | sample = (nptr->sampperiod & 0xF0) | (nptr->sampeffect >> 4); |
425 | period = ((nptr->sampperiod & 0xF) << 8) | nptr->period; |
426 | effect = ((nptr->sampeffect & 0xF) << 8) | nptr->effect; |
427 | |
428 | operiod = cptr->period; |
429 | |
430 | if ( period || sample ) |
431 | { |
432 | if( sample && sample < 32 ) |
433 | { |
434 | cptr->sampnum = sample - 1; |
435 | } |
436 | |
437 | if( period || sample ) |
438 | { |
439 | cptr->sampdata = (char *) mod->sampledata[cptr->sampnum]; |
440 | cptr->length = mod->song.samples[cptr->sampnum].length; |
441 | cptr->reppnt = mod->song.samples[cptr->sampnum].reppnt; |
442 | cptr->replen = mod->song.samples[cptr->sampnum].replen; |
443 | |
444 | cptr->finetune = (mod->song.samples[cptr->sampnum].finetune)&0xF; |
445 | |
446 | if(effect>>8!=4 && effect>>8!=6) |
447 | { |
448 | cptr->vibraperiod=0; |
449 | cptr->vibrapointeur=0; |
450 | } |
451 | } |
452 | |
453 | if( (sample != 0) && ( (effect>>8) != EFFECT_VOLSLIDE_TONEPORTA ) ) |
454 | { |
455 | cptr->volume = mod->song.samples[cptr->sampnum].volume; |
456 | cptr->volumeslide = 0; |
457 | } |
458 | |
459 | if( ( (effect>>8) != EFFECT_TONE_PORTAMENTO && (effect>>8)!=EFFECT_VOLSLIDE_TONEPORTA) ) |
460 | { |
461 | if (period!=0) |
462 | cptr->samppos = 0; |
463 | } |
464 | |
465 | cptr->decalperiod = 0; |
466 | if( period ) |
467 | { |
468 | if(cptr->finetune) |
469 | { |
470 | if( cptr->finetune <= 7 ) |
471 | { |
472 | period = mod->fullperiod[getnote(mod,period,0) + cptr->finetune]; |
473 | } |
474 | else |
475 | { |
476 | period = mod->fullperiod[getnote(mod,period,0) - (16 - (cptr->finetune)) ]; |
477 | } |
478 | } |
479 | |
480 | cptr->period = period; |
481 | } |
482 | |
483 | } |
484 | |
485 | cptr->effect = 0; |
486 | cptr->parameffect = 0; |
487 | cptr->effect_code = effect; |
488 | |
489 | switch (effect >> 8) |
490 | { |
491 | case EFFECT_ARPEGGIO: |
492 | /* |
493 | [0]: Arpeggio |
494 | Where [0][x][y] means "play note, note+x semitones, note+y |
495 | semitones, then return to original note". The fluctuations are |
496 | carried out evenly spaced in one pattern division. They are usually |
497 | used to simulate chords, but this doesn't work too well. They are |
498 | also used to produce heavy vibrato. A major chord is when x=4, y=7. |
499 | A minor chord is when x=3, y=7. |
500 | */ |
501 | |
502 | if(effect&0xff) |
503 | { |
504 | cptr->effect = EFFECT_ARPEGGIO; |
505 | cptr->parameffect = effect&0xff; |
506 | |
507 | cptr->ArpIndex = 0; |
508 | |
509 | curnote = getnote(mod,cptr->period,cptr->finetune); |
510 | |
511 | cptr->Arpperiods[0] = cptr->period; |
512 | |
513 | arpnote = curnote + (((cptr->parameffect>>4)&0xF)*8); |
514 | if( arpnote >= FULL_PERIOD_TABLE_LENGTH ) |
515 | arpnote = FULL_PERIOD_TABLE_LENGTH - 1; |
516 | |
517 | cptr->Arpperiods[1] = mod->fullperiod[arpnote]; |
518 | |
519 | arpnote = curnote + (((cptr->parameffect)&0xF)*8); |
520 | if( arpnote >= FULL_PERIOD_TABLE_LENGTH ) |
521 | arpnote = FULL_PERIOD_TABLE_LENGTH - 1; |
522 | |
523 | cptr->Arpperiods[2] = mod->fullperiod[arpnote]; |
524 | } |
525 | break; |
526 | |
527 | case EFFECT_PORTAMENTO_UP: |
528 | /* |
529 | [1]: Slide up |
530 | Where [1][x][y] means "smoothly decrease the period of current |
531 | sample by x*16+y after each tick in the division". The |
532 | ticks/division are set with the 'set speed' effect (see below). If |
533 | the period of the note being played is z, then the final period |
534 | will be z - (x*16 + y)*(ticks - 1). As the slide rate depends on |
535 | the speed, changing the speed will change the slide. You cannot |
536 | slide beyond the note B3 (period 113). |
537 | */ |
538 | |
539 | cptr->effect = EFFECT_PORTAMENTO_UP; |
540 | cptr->parameffect = effect&0xff; |
541 | break; |
542 | |
543 | case EFFECT_PORTAMENTO_DOWN: |
544 | /* |
545 | [2]: Slide down |
546 | Where [2][x][y] means "smoothly increase the period of current |
547 | sample by x*16+y after each tick in the division". Similar to [1], |
548 | but lowers the pitch. You cannot slide beyond the note C1 (period |
549 | 856). |
550 | */ |
551 | |
552 | cptr->effect = EFFECT_PORTAMENTO_DOWN; |
553 | cptr->parameffect = effect&0xff; |
554 | break; |
555 | |
556 | case EFFECT_TONE_PORTAMENTO: |
557 | /* |
558 | [3]: Slide to note |
559 | Where [3][x][y] means "smoothly change the period of current sample |
560 | by x*16+y after each tick in the division, never sliding beyond |
561 | current period". The period-length in this channel's division is a |
562 | parameter to this effect, and hence is not played. Sliding to a |
563 | note is similar to effects [1] and [2], but the slide will not go |
564 | beyond the given period, and the direction is implied by that |
565 | period. If x and y are both 0, then the old slide will continue. |
566 | */ |
567 | |
568 | cptr->effect = EFFECT_TONE_PORTAMENTO; |
569 | if( (effect&0xff) != 0 ) |
570 | { |
571 | cptr->portaspeed = (short)(effect&0xff); |
572 | } |
573 | |
574 | if(period!=0) |
575 | { |
576 | cptr->portaperiod = period; |
577 | cptr->period = operiod; |
578 | } |
579 | break; |
580 | |
581 | case EFFECT_VIBRATO: |
582 | /* |
583 | [4]: Vibrato |
584 | Where [4][x][y] means "oscillate the sample pitch using a |
585 | particular waveform with amplitude y/16 semitones, such that (x * |
586 | ticks)/64 cycles occur in the division". The waveform is set using |
587 | effect [14][4]. By placing vibrato effects on consecutive |
588 | divisions, the vibrato effect can be maintained. If either x or y |
589 | are 0, then the old vibrato values will be used. |
590 | */ |
591 | |
592 | cptr->effect = EFFECT_VIBRATO; |
593 | if( ( effect & 0x0F ) != 0 ) // Depth continue or change ? |
594 | cptr->vibraparam = (cptr->vibraparam & 0xF0) | ( effect & 0x0F ); |
595 | if( ( effect & 0xF0 ) != 0 ) // Speed continue or change ? |
596 | cptr->vibraparam = (cptr->vibraparam & 0x0F) | ( effect & 0xF0 ); |
597 | |
598 | break; |
599 | |
600 | case EFFECT_VOLSLIDE_TONEPORTA: |
601 | /* |
602 | [5]: Continue 'Slide to note', but also do Volume slide |
603 | Where [5][x][y] means "either slide the volume up x*(ticks - 1) or |
604 | slide the volume down y*(ticks - 1), at the same time as continuing |
605 | the last 'Slide to note'". It is illegal for both x and y to be |
606 | non-zero. You cannot slide outside the volume range 0..64. The |
607 | period-length in this channel's division is a parameter to this |
608 | effect, and hence is not played. |
609 | */ |
610 | |
611 | if( period != 0 ) |
612 | { |
613 | cptr->portaperiod = period; |
614 | cptr->period = operiod; |
615 | } |
616 | |
617 | cptr->effect = EFFECT_VOLSLIDE_TONEPORTA; |
618 | if( ( effect & 0xFF ) != 0 ) |
619 | cptr->volumeslide = ( effect & 0xFF ); |
620 | |
621 | break; |
622 | |
623 | case EFFECT_VOLSLIDE_VIBRATO: |
624 | /* |
625 | [6]: Continue 'Vibrato', but also do Volume slide |
626 | Where [6][x][y] means "either slide the volume up x*(ticks - 1) or |
627 | slide the volume down y*(ticks - 1), at the same time as continuing |
628 | the last 'Vibrato'". It is illegal for both x and y to be non-zero. |
629 | You cannot slide outside the volume range 0..64. |
630 | */ |
631 | |
632 | cptr->effect = EFFECT_VOLSLIDE_VIBRATO; |
633 | if( (effect & 0xFF) != 0 ) |
634 | cptr->volumeslide = (effect & 0xFF); |
635 | break; |
636 | |
637 | case EFFECT_SET_OFFSET: |
638 | /* |
639 | [9]: Set sample offset |
640 | Where [9][x][y] means "play the sample from offset x*4096 + y*256". |
641 | The offset is measured in words. If no sample is given, yet one is |
642 | still playing on this channel, it should be retriggered to the new |
643 | offset using the current volume. |
644 | */ |
645 | |
646 | cptr->samppos = ((effect>>4) * 4096) + ((effect&0xF)*256); |
647 | |
648 | break; |
649 | |
650 | case EFFECT_VOLUME_SLIDE: |
651 | /* |
652 | [10]: Volume slide |
653 | Where [10][x][y] means "either slide the volume up x*(ticks - 1) or |
654 | slide the volume down y*(ticks - 1)". If both x and y are non-zero, |
655 | then the y value is ignored (assumed to be 0). You cannot slide |
656 | outside the volume range 0..64. |
657 | */ |
658 | |
659 | cptr->effect = EFFECT_VOLUME_SLIDE; |
660 | cptr->volumeslide = (effect & 0xFF); |
661 | break; |
662 | |
663 | case EFFECT_JUMP_POSITION: |
664 | /* |
665 | [11]: Position Jump |
666 | Where [11][x][y] means "stop the pattern after this division, and |
667 | continue the song at song-position x*16+y". This shifts the |
668 | 'pattern-cursor' in the pattern table (see above). Legal values for |
669 | x*16+y are from 0 to 127. |
670 | */ |
671 | |
672 | mod->tablepos = (effect & 0xFF); |
673 | if(mod->tablepos >= mod->song.length) |
674 | { |
675 | mod->tablepos = 0; |
676 | } |
677 | mod->patternpos = 0; |
678 | mod->jump_loop_effect = 1; |
679 | |
680 | break; |
681 | |
682 | case EFFECT_SET_VOLUME: |
683 | /* |
684 | [12]: Set volume |
685 | Where [12][x][y] means "set current sample's volume to x*16+y". |
686 | Legal volumes are 0..64. |
687 | */ |
688 | |
689 | cptr->volume = (effect & 0xFF); |
690 | break; |
691 | |
692 | case EFFECT_PATTERN_BREAK: |
693 | /* |
694 | [13]: Pattern Break |
695 | Where [13][x][y] means "stop the pattern after this division, and |
696 | continue the song at the next pattern at division x*10+y" (the 10 |
697 | is not a typo). Legal divisions are from 0 to 63 (note Protracker |
698 | exception above). |
699 | */ |
700 | |
701 | mod->patternpos = ( ((effect>>4)&0xF)*10 + (effect&0xF) ) * mod->number_of_channels; |
702 | mod->jump_loop_effect = 1; |
703 | mod->tablepos++; |
704 | if(mod->tablepos >= mod->song.length) |
705 | { |
706 | mod->tablepos = 0; |
707 | } |
708 | |
709 | break; |
710 | |
711 | case EFFECT_EXTENDED: |
712 | switch( (effect>>4) & 0xF ) |
713 | { |
714 | case EFFECT_E_FINE_PORTA_UP: |
715 | /* |
716 | [14][1]: Fineslide up |
717 | Where [14][1][x] means "decrement the period of the current sample |
718 | by x". The incrementing takes place at the beginning of the |
719 | division, and hence there is no actual sliding. You cannot slide |
720 | beyond the note B3 (period 113). |
721 | */ |
722 | |
723 | cptr->period -= (effect & 0xF); |
724 | if( cptr->period < 113 ) |
725 | cptr->period = 113; |
726 | break; |
727 | |
728 | case EFFECT_E_FINE_PORTA_DOWN: |
729 | /* |
730 | [14][2]: Fineslide down |
731 | Where [14][2][x] means "increment the period of the current sample |
732 | by x". Similar to [14][1] but shifts the pitch down. You cannot |
733 | slide beyond the note C1 (period 856). |
734 | */ |
735 | |
736 | cptr->period += (effect & 0xF); |
737 | if( cptr->period > 856 ) |
738 | cptr->period = 856; |
739 | break; |
740 | |
741 | case EFFECT_E_FINE_VOLSLIDE_UP: |
742 | /* |
743 | [14][10]: Fine volume slide up |
744 | Where [14][10][x] means "increment the volume of the current sample |
745 | by x". The incrementing takes place at the beginning of the |
746 | division, and hence there is no sliding. You cannot slide beyond |
747 | volume 64. |
748 | */ |
749 | |
750 | cptr->volume += (effect & 0xF); |
751 | if( cptr->volume>64 ) |
752 | cptr->volume = 64; |
753 | break; |
754 | |
755 | case EFFECT_E_FINE_VOLSLIDE_DOWN: |
756 | /* |
757 | [14][11]: Fine volume slide down |
758 | Where [14][11][x] means "decrement the volume of the current sample |
759 | by x". Similar to [14][10] but lowers volume. You cannot slide |
760 | beyond volume 0. |
761 | */ |
762 | |
763 | cptr->volume -= (effect & 0xF); |
764 | if( cptr->volume > 200 ) |
765 | cptr->volume = 0; |
766 | break; |
767 | |
768 | case EFFECT_E_PATTERN_LOOP: |
769 | /* |
770 | [14][6]: Loop pattern |
771 | Where [14][6][x] means "set the start of a loop to this division if |
772 | x is 0, otherwise after this division, jump back to the start of a |
773 | loop and play it another x times before continuing". If the start |
774 | of the loop was not set, it will default to the start of the |
775 | current pattern. Hence 'loop pattern' cannot be performed across |
776 | multiple patterns. Note that loops do not support nesting, and you |
777 | may generate an infinite loop if you try to nest 'loop pattern's. |
778 | */ |
779 | |
780 | if( effect & 0xF ) |
781 | { |
782 | if( cptr->patternloopcnt ) |
783 | { |
784 | cptr->patternloopcnt--; |
785 | if( cptr->patternloopcnt ) |
786 | { |
787 | mod->patternpos = cptr->patternloopstartpoint; |
788 | mod->jump_loop_effect = 1; |
789 | } |
790 | else |
791 | { |
792 | cptr->patternloopstartpoint = mod->patternpos ; |
793 | } |
794 | } |
795 | else |
796 | { |
797 | cptr->patternloopcnt = (effect & 0xF); |
798 | mod->patternpos = cptr->patternloopstartpoint; |
799 | mod->jump_loop_effect = 1; |
800 | } |
801 | } |
802 | else // Start point |
803 | { |
804 | cptr->patternloopstartpoint = mod->patternpos; |
805 | } |
806 | |
807 | break; |
808 | |
809 | case EFFECT_E_PATTERN_DELAY: |
810 | /* |
811 | [14][14]: Delay pattern |
812 | Where [14][14][x] means "after this division there will be a delay |
813 | equivalent to the time taken to play x divisions after which the |
814 | pattern will be resumed". The delay only relates to the |
815 | interpreting of new divisions, and all effects and previous notes |
816 | continue during delay. |
817 | */ |
818 | |
819 | mod->patterndelay = (effect & 0xF); |
820 | break; |
821 | |
822 | case EFFECT_E_NOTE_CUT: |
823 | /* |
824 | [14][12]: Cut sample |
825 | Where [14][12][x] means "after the current sample has been played |
826 | for x ticks in this division, its volume will be set to 0". This |
827 | implies that if x is 0, then you will not hear any of the sample. |
828 | If you wish to insert "silence" in a pattern, it is better to use a |
829 | "silence"-sample (see above) due to the lack of proper support for |
830 | this effect. |
831 | */ |
832 | cptr->effect = EFFECT_E_NOTE_CUT; |
833 | cptr->cut_param = (effect & 0xF); |
834 | if(!cptr->cut_param) |
835 | cptr->volume = 0; |
836 | break; |
837 | |
838 | default: |
839 | |
840 | break; |
841 | } |
842 | break; |
843 | |
844 | case 0xF: |
845 | /* |
846 | [15]: Set speed |
847 | Where [15][x][y] means "set speed to x*16+y". Though it is nowhere |
848 | near that simple. Let z = x*16+y. Depending on what values z takes, |
849 | different units of speed are set, there being two: ticks/division |
850 | and beats/minute (though this one is only a label and not strictly |
851 | true). If z=0, then what should technically happen is that the |
852 | module stops, but in practice it is treated as if z=1, because |
853 | there is already a method for stopping the module (running out of |
854 | patterns). If z<=32, then it means "set ticks/division to z" |
855 | otherwise it means "set beats/minute to z" (convention says that |
856 | this should read "If z<32.." but there are some composers out there |
857 | that defy conventions). Default values are 6 ticks/division, and |
858 | 125 beats/minute (4 divisions = 1 beat). The beats/minute tag is |
859 | only meaningful for 6 ticks/division. To get a more accurate view |
860 | of how things work, use the following formula: |
861 | 24 * beats/minute |
862 | divisions/minute = ----------------- |
863 | ticks/division |
864 | Hence divisions/minute range from 24.75 to 6120, eg. to get a value |
865 | of 2000 divisions/minute use 3 ticks/division and 250 beats/minute. |
866 | If multiple "set speed" effects are performed in a single division, |
867 | the ones on higher-numbered channels take precedence over the ones |
868 | on lower-numbered channels. This effect has a large number of |
869 | different implementations, but the one described here has the |
870 | widest usage. |
871 | */ |
872 | |
873 | if( (effect&0xFF) < 0x21 ) |
874 | { |
875 | if( effect&0xFF ) |
876 | { |
877 | mod->song.speed = effect&0xFF; |
878 | mod->patternticksaim = (long)mod->song.speed * ((mod->playrate * 5 ) / (((long)2 * (long)mod->bpm))); |
879 | } |
880 | } |
881 | |
882 | if( (effect&0xFF) >= 0x21 ) |
883 | { |
884 | /// HZ = 2 * BPM / 5 |
885 | mod->bpm = effect&0xFF; |
886 | mod->patternticksaim = (long)mod->song.speed * ((mod->playrate * 5 ) / (((long)2 * (long)mod->bpm))); |
887 | } |
888 | |
889 | break; |
890 | |
891 | default: |
892 | // Unsupported effect |
893 | break; |
894 | |
895 | } |
896 | |
897 | } |
898 | |
899 | static void workeffect( note * nptr, channel * cptr ) |
900 | { |
901 | switch(cptr->effect) |
902 | { |
903 | case EFFECT_ARPEGGIO: |
904 | |
905 | if( cptr->parameffect ) |
906 | { |
907 | cptr->decalperiod = cptr->period - cptr->Arpperiods[cptr->ArpIndex]; |
908 | |
909 | cptr->ArpIndex++; |
910 | if( cptr->ArpIndex>2 ) |
911 | cptr->ArpIndex = 0; |
912 | } |
913 | break; |
914 | |
915 | case EFFECT_PORTAMENTO_UP: |
916 | |
917 | if(cptr->period) |
918 | { |
919 | cptr->period -= cptr->parameffect; |
920 | |
921 | if( cptr->period < 113 || cptr->period > 20000 ) |
922 | cptr->period = 113; |
923 | } |
924 | |
925 | break; |
926 | |
927 | case EFFECT_PORTAMENTO_DOWN: |
928 | |
929 | if(cptr->period) |
930 | { |
931 | cptr->period += cptr->parameffect; |
932 | |
933 | if( cptr->period > 20000 ) |
934 | cptr->period = 20000; |
935 | } |
936 | |
937 | break; |
938 | |
939 | case EFFECT_VOLSLIDE_TONEPORTA: |
940 | case EFFECT_TONE_PORTAMENTO: |
941 | |
942 | if( cptr->period && ( cptr->period != cptr->portaperiod ) && cptr->portaperiod ) |
943 | { |
944 | if( cptr->period > cptr->portaperiod ) |
945 | { |
946 | if( cptr->period - cptr->portaperiod >= cptr->portaspeed ) |
947 | { |
948 | cptr->period -= cptr->portaspeed; |
949 | } |
950 | else |
951 | { |
952 | cptr->period = cptr->portaperiod; |
953 | } |
954 | } |
955 | else |
956 | { |
957 | if( cptr->portaperiod - cptr->period >= cptr->portaspeed ) |
958 | { |
959 | cptr->period += cptr->portaspeed; |
960 | } |
961 | else |
962 | { |
963 | cptr->period = cptr->portaperiod; |
964 | } |
965 | } |
966 | |
967 | if( cptr->period == cptr->portaperiod ) |
968 | { |
969 | // If the slide is over, don't let it to be retriggered. |
970 | cptr->portaperiod = 0; |
971 | } |
972 | } |
973 | |
974 | if( cptr->effect == EFFECT_VOLSLIDE_TONEPORTA ) |
975 | { |
976 | if( cptr->volumeslide > 0x0F ) |
977 | { |
978 | cptr->volume = cptr->volume + (cptr->volumeslide>>4); |
979 | |
980 | if(cptr->volume>63) |
981 | cptr->volume = 63; |
982 | } |
983 | else |
984 | { |
985 | cptr->volume = cptr->volume - (cptr->volumeslide); |
986 | |
987 | if(cptr->volume>63) |
988 | cptr->volume=0; |
989 | } |
990 | } |
991 | break; |
992 | |
993 | case EFFECT_VOLSLIDE_VIBRATO: |
994 | case EFFECT_VIBRATO: |
995 | |
996 | cptr->vibraperiod = ( (cptr->vibraparam&0xF) * sintable[cptr->vibrapointeur&0x1F] )>>7; |
997 | |
998 | if( cptr->vibrapointeur > 31 ) |
999 | cptr->vibraperiod = -cptr->vibraperiod; |
1000 | |
1001 | cptr->vibrapointeur = (cptr->vibrapointeur+(((cptr->vibraparam>>4))&0xf)) & 0x3F; |
1002 | |
1003 | if( cptr->effect == EFFECT_VOLSLIDE_VIBRATO ) |
1004 | { |
1005 | if( cptr->volumeslide > 0xF ) |
1006 | { |
1007 | cptr->volume = cptr->volume+(cptr->volumeslide>>4); |
1008 | |
1009 | if( cptr->volume > 64 ) |
1010 | cptr->volume = 64; |
1011 | } |
1012 | else |
1013 | { |
1014 | cptr->volume = cptr->volume - cptr->volumeslide; |
1015 | |
1016 | if( cptr->volume > 64 ) |
1017 | cptr->volume = 0; |
1018 | } |
1019 | } |
1020 | |
1021 | break; |
1022 | |
1023 | case EFFECT_VOLUME_SLIDE: |
1024 | |
1025 | if( cptr->volumeslide > 0xF ) |
1026 | { |
1027 | cptr->volume += (cptr->volumeslide>>4); |
1028 | |
1029 | if( cptr->volume > 64 ) |
1030 | cptr->volume = 64; |
1031 | } |
1032 | else |
1033 | { |
1034 | cptr->volume -= (cptr->volumeslide&0xf); |
1035 | |
1036 | if( cptr->volume > 64 ) |
1037 | cptr->volume = 0; |
1038 | } |
1039 | break; |
1040 | |
1041 | case EFFECT_E_NOTE_CUT: |
1042 | if(cptr->cut_param) |
1043 | cptr->cut_param--; |
1044 | |
1045 | if(!cptr->cut_param) |
1046 | cptr->volume = 0; |
1047 | break; |
1048 | |
1049 | default: |
1050 | break; |
1051 | |
1052 | } |
1053 | |
1054 | } |
1055 | |
1056 | /////////////////////////////////////////////////////////////////////////////////// |
1057 | bool jar_mod_init(jar_mod_context_t * modctx) |
1058 | { |
1059 | muint i,j; |
1060 | |
1061 | if( modctx ) |
1062 | { |
1063 | memclear(modctx, 0, sizeof(jar_mod_context_t)); |
1064 | modctx->playrate = DEFAULT_SAMPLE_RATE; |
1065 | modctx->stereo = 1; |
1066 | modctx->stereo_separation = 1; |
1067 | modctx->bits = 16; |
1068 | modctx->filter = 1; |
1069 | |
1070 | for(i=0; i < PERIOD_TABLE_LENGTH - 1; i++) |
1071 | { |
1072 | for(j=0; j < 8; j++) |
1073 | { |
1074 | modctx->fullperiod[(i*8) + j] = periodtable[i] - ((( periodtable[i] - periodtable[i+1] ) / 8) * j); |
1075 | } |
1076 | } |
1077 | |
1078 | return 1; |
1079 | } |
1080 | |
1081 | return 0; |
1082 | } |
1083 | |
1084 | bool jar_mod_setcfg(jar_mod_context_t * modctx, int samplerate, int bits, int stereo, int stereo_separation, int filter) |
1085 | { |
1086 | if( modctx ) |
1087 | { |
1088 | modctx->playrate = samplerate; |
1089 | |
1090 | if( stereo ) |
1091 | modctx->stereo = 1; |
1092 | else |
1093 | modctx->stereo = 0; |
1094 | |
1095 | if(stereo_separation < 4) |
1096 | { |
1097 | modctx->stereo_separation = stereo_separation; |
1098 | } |
1099 | |
1100 | if( bits == 8 || bits == 16 ) |
1101 | modctx->bits = bits; |
1102 | else |
1103 | modctx->bits = 16; |
1104 | |
1105 | if( filter ) |
1106 | modctx->filter = 1; |
1107 | else |
1108 | modctx->filter = 0; |
1109 | |
1110 | return 1; |
1111 | } |
1112 | |
1113 | return 0; |
1114 | } |
1115 | |
1116 | // make certain that mod_data stays in memory while playing |
1117 | static bool jar_mod_load( jar_mod_context_t * modctx, void * mod_data, int mod_data_size ) |
1118 | { |
1119 | muint i, max; |
1120 | unsigned short t; |
1121 | sample *sptr; |
1122 | unsigned char * modmemory,* endmodmemory; |
1123 | |
1124 | modmemory = (unsigned char *)mod_data; |
1125 | endmodmemory = modmemory + mod_data_size; |
1126 | |
1127 | |
1128 | |
1129 | if(modmemory) |
1130 | { |
1131 | if( modctx ) |
1132 | { |
1133 | memcopy(&(modctx->song.title),modmemory,1084); |
1134 | |
1135 | i = 0; |
1136 | modctx->number_of_channels = 0; |
1137 | while(modlist[i].numberofchannels) |
1138 | { |
1139 | if(memcompare(modctx->song.signature,modlist[i].signature,4)) |
1140 | { |
1141 | modctx->number_of_channels = modlist[i].numberofchannels; |
1142 | } |
1143 | |
1144 | i++; |
1145 | } |
1146 | |
1147 | if( !modctx->number_of_channels ) |
1148 | { |
1149 | // 15 Samples modules support |
1150 | // Shift the whole datas to make it look likes a standard 4 channels mod. |
1151 | memcopy(&(modctx->song.signature), "M.K." , 4); |
1152 | memcopy(&(modctx->song.length), &(modctx->song.samples[15]), 130); |
1153 | memclear(&(modctx->song.samples[15]), 0, 480); |
1154 | modmemory += 600; |
1155 | modctx->number_of_channels = 4; |
1156 | } |
1157 | else |
1158 | { |
1159 | modmemory += 1084; |
1160 | } |
1161 | |
1162 | if( modmemory >= endmodmemory ) |
1163 | return 0; // End passed ? - Probably a bad file ! |
1164 | |
1165 | // Patterns loading |
1166 | for (i = max = 0; i < 128; i++) |
1167 | { |
1168 | while (max <= modctx->song.patterntable[i]) |
1169 | { |
1170 | modctx->patterndata[max] = (note*)modmemory; |
1171 | modmemory += (256*modctx->number_of_channels); |
1172 | max++; |
1173 | |
1174 | if( modmemory >= endmodmemory ) |
1175 | return 0; // End passed ? - Probably a bad file ! |
1176 | } |
1177 | } |
1178 | |
1179 | for (i = 0; i < 31; i++) |
1180 | modctx->sampledata[i]=0; |
1181 | |
1182 | // Samples loading |
1183 | for (i = 0, sptr = modctx->song.samples; i <31; i++, sptr++) |
1184 | { |
1185 | t= (sptr->length &0xFF00)>>8 | (sptr->length &0xFF)<<8; |
1186 | sptr->length = t*2; |
1187 | |
1188 | t= (sptr->reppnt &0xFF00)>>8 | (sptr->reppnt &0xFF)<<8; |
1189 | sptr->reppnt = t*2; |
1190 | |
1191 | t= (sptr->replen &0xFF00)>>8 | (sptr->replen &0xFF)<<8; |
1192 | sptr->replen = t*2; |
1193 | |
1194 | |
1195 | if (sptr->length == 0) continue; |
1196 | |
1197 | modctx->sampledata[i] = (char*)modmemory; |
1198 | modmemory += sptr->length; |
1199 | |
1200 | if (sptr->replen + sptr->reppnt > sptr->length) |
1201 | sptr->replen = sptr->length - sptr->reppnt; |
1202 | |
1203 | if( modmemory > endmodmemory ) |
1204 | return 0; // End passed ? - Probably a bad file ! |
1205 | } |
1206 | |
1207 | // States init |
1208 | |
1209 | modctx->tablepos = 0; |
1210 | modctx->patternpos = 0; |
1211 | modctx->song.speed = 6; |
1212 | modctx->bpm = 125; |
1213 | modctx->samplenb = 0; |
1214 | |
1215 | modctx->patternticks = (((long)modctx->song.speed * modctx->playrate * 5)/ (2 * modctx->bpm)) + 1; |
1216 | modctx->patternticksaim = ((long)modctx->song.speed * modctx->playrate * 5) / (2 * modctx->bpm); |
1217 | |
1218 | modctx->sampleticksconst = 3546894UL / modctx->playrate; //8448*428/playrate; |
1219 | |
1220 | for(i=0; i < modctx->number_of_channels; i++) |
1221 | { |
1222 | modctx->channels[i].volume = 0; |
1223 | modctx->channels[i].period = 0; |
1224 | } |
1225 | |
1226 | modctx->mod_loaded = 1; |
1227 | |
1228 | return 1; |
1229 | } |
1230 | } |
1231 | |
1232 | return 0; |
1233 | } |
1234 | |
1235 | void jar_mod_fillbuffer( jar_mod_context_t * modctx, short * outbuffer, unsigned long nbsample, jar_mod_tracker_buffer_state * trkbuf ) |
1236 | { |
1237 | unsigned long i, j; |
1238 | unsigned long k; |
1239 | unsigned char c; |
1240 | unsigned int state_remaining_steps; |
1241 | int l,r; |
1242 | int ll,lr; |
1243 | int tl,tr; |
1244 | short finalperiod; |
1245 | note *nptr; |
1246 | channel *cptr; |
1247 | |
1248 | if( modctx && outbuffer ) |
1249 | { |
1250 | if(modctx->mod_loaded) |
1251 | { |
1252 | state_remaining_steps = 0; |
1253 | |
1254 | if( trkbuf ) |
1255 | { |
1256 | trkbuf->cur_rd_index = 0; |
1257 | |
1258 | memcopy(trkbuf->name,modctx->song.title,sizeof(modctx->song.title)); |
1259 | |
1260 | for(i=0;i<31;i++) |
1261 | { |
1262 | memcopy(trkbuf->instruments[i].name,modctx->song.samples[i].name,sizeof(trkbuf->instruments[i].name)); |
1263 | } |
1264 | } |
1265 | |
1266 | ll = modctx->last_l_sample; |
1267 | lr = modctx->last_r_sample; |
1268 | |
1269 | for (i = 0; i < nbsample; i++) |
1270 | { |
1271 | //--------------------------------------- |
1272 | if( modctx->patternticks++ > modctx->patternticksaim ) |
1273 | { |
1274 | if( !modctx->patterndelay ) |
1275 | { |
1276 | nptr = modctx->patterndata[modctx->song.patterntable[modctx->tablepos]]; |
1277 | nptr = nptr + modctx->patternpos; |
1278 | cptr = modctx->channels; |
1279 | |
1280 | modctx->patternticks = 0; |
1281 | modctx->patterntickse = 0; |
1282 | |
1283 | for(c=0;c<modctx->number_of_channels;c++) |
1284 | { |
1285 | worknote((note*)(nptr+c), (channel*)(cptr+c),(char)(c+1),modctx); |
1286 | } |
1287 | |
1288 | if( !modctx->jump_loop_effect ) |
1289 | modctx->patternpos += modctx->number_of_channels; |
1290 | else |
1291 | modctx->jump_loop_effect = 0; |
1292 | |
1293 | if( modctx->patternpos == 64*modctx->number_of_channels ) |
1294 | { |
1295 | modctx->tablepos++; |
1296 | modctx->patternpos = 0; |
1297 | if(modctx->tablepos >= modctx->song.length) |
1298 | { |
1299 | modctx->tablepos = 0; |
1300 | modctx->loopcount++; // count next loop |
1301 | } |
1302 | } |
1303 | } |
1304 | else |
1305 | { |
1306 | modctx->patterndelay--; |
1307 | modctx->patternticks = 0; |
1308 | modctx->patterntickse = 0; |
1309 | } |
1310 | |
1311 | } |
1312 | |
1313 | if( modctx->patterntickse++ > (modctx->patternticksaim/modctx->song.speed) ) |
1314 | { |
1315 | nptr = modctx->patterndata[modctx->song.patterntable[modctx->tablepos]]; |
1316 | nptr = nptr + modctx->patternpos; |
1317 | cptr = modctx->channels; |
1318 | |
1319 | for(c=0;c<modctx->number_of_channels;c++) |
1320 | { |
1321 | workeffect(nptr+c, cptr+c); |
1322 | } |
1323 | |
1324 | modctx->patterntickse = 0; |
1325 | } |
1326 | |
1327 | //--------------------------------------- |
1328 | |
1329 | if( trkbuf && !state_remaining_steps ) |
1330 | { |
1331 | if( trkbuf->nb_of_state < trkbuf->nb_max_of_state ) |
1332 | { |
1333 | memclear(&trkbuf->track_state_buf[trkbuf->nb_of_state], 0, sizeof(tracker_state)); |
1334 | } |
1335 | } |
1336 | |
1337 | l=0; |
1338 | r=0; |
1339 | |
1340 | for(j =0, cptr = modctx->channels; j < modctx->number_of_channels ; j++, cptr++) |
1341 | { |
1342 | if( cptr->period != 0 ) |
1343 | { |
1344 | finalperiod = cptr->period - cptr->decalperiod - cptr->vibraperiod; |
1345 | if( finalperiod ) |
1346 | { |
1347 | cptr->samppos += ( (modctx->sampleticksconst<<10) / finalperiod ); |
1348 | } |
1349 | |
1350 | cptr->ticks++; |
1351 | |
1352 | if( cptr->replen<=2 ) |
1353 | { |
1354 | if( (cptr->samppos>>10) >= (cptr->length) ) |
1355 | { |
1356 | cptr->length = 0; |
1357 | cptr->reppnt = 0; |
1358 | |
1359 | if( cptr->length ) |
1360 | cptr->samppos = cptr->samppos % (((unsigned long)cptr->length)<<10); |
1361 | else |
1362 | cptr->samppos = 0; |
1363 | } |
1364 | } |
1365 | else |
1366 | { |
1367 | if( (cptr->samppos>>10) >= (unsigned long)(cptr->replen+cptr->reppnt) ) |
1368 | { |
1369 | cptr->samppos = ((unsigned long)(cptr->reppnt)<<10) + (cptr->samppos % ((unsigned long)(cptr->replen+cptr->reppnt)<<10)); |
1370 | } |
1371 | } |
1372 | |
1373 | k = cptr->samppos >> 10; |
1374 | |
1375 | if( cptr->sampdata!=0 && ( ((j&3)==1) || ((j&3)==2) ) ) |
1376 | { |
1377 | r += ( cptr->sampdata[k] * cptr->volume ); |
1378 | } |
1379 | |
1380 | if( cptr->sampdata!=0 && ( ((j&3)==0) || ((j&3)==3) ) ) |
1381 | { |
1382 | l += ( cptr->sampdata[k] * cptr->volume ); |
1383 | } |
1384 | |
1385 | if( trkbuf && !state_remaining_steps ) |
1386 | { |
1387 | if( trkbuf->nb_of_state < trkbuf->nb_max_of_state ) |
1388 | { |
1389 | trkbuf->track_state_buf[trkbuf->nb_of_state].number_of_tracks = modctx->number_of_channels; |
1390 | trkbuf->track_state_buf[trkbuf->nb_of_state].buf_index = i; |
1391 | trkbuf->track_state_buf[trkbuf->nb_of_state].cur_pattern = modctx->song.patterntable[modctx->tablepos]; |
1392 | trkbuf->track_state_buf[trkbuf->nb_of_state].cur_pattern_pos = modctx->patternpos / modctx->number_of_channels; |
1393 | trkbuf->track_state_buf[trkbuf->nb_of_state].cur_pattern_table_pos = modctx->tablepos; |
1394 | trkbuf->track_state_buf[trkbuf->nb_of_state].bpm = modctx->bpm; |
1395 | trkbuf->track_state_buf[trkbuf->nb_of_state].speed = modctx->song.speed; |
1396 | trkbuf->track_state_buf[trkbuf->nb_of_state].tracks[j].cur_effect = cptr->effect_code; |
1397 | trkbuf->track_state_buf[trkbuf->nb_of_state].tracks[j].cur_parameffect = cptr->parameffect; |
1398 | trkbuf->track_state_buf[trkbuf->nb_of_state].tracks[j].cur_period = finalperiod; |
1399 | trkbuf->track_state_buf[trkbuf->nb_of_state].tracks[j].cur_volume = cptr->volume; |
1400 | trkbuf->track_state_buf[trkbuf->nb_of_state].tracks[j].instrument_number = (unsigned char)cptr->sampnum; |
1401 | } |
1402 | } |
1403 | } |
1404 | } |
1405 | |
1406 | if( trkbuf && !state_remaining_steps ) |
1407 | { |
1408 | state_remaining_steps = trkbuf->sample_step; |
1409 | |
1410 | if(trkbuf->nb_of_state < trkbuf->nb_max_of_state) |
1411 | trkbuf->nb_of_state++; |
1412 | } |
1413 | else |
1414 | { |
1415 | state_remaining_steps--; |
1416 | } |
1417 | |
1418 | tl = (short)l; |
1419 | tr = (short)r; |
1420 | |
1421 | if ( modctx->filter ) |
1422 | { |
1423 | // Filter |
1424 | l = (l+ll)>>1; |
1425 | r = (r+lr)>>1; |
1426 | } |
1427 | |
1428 | if ( modctx->stereo_separation == 1 ) |
1429 | { |
1430 | // Left & Right Stereo panning |
1431 | l = (l+(r>>1)); |
1432 | r = (r+(l>>1)); |
1433 | } |
1434 | |
1435 | // Level limitation |
1436 | if( l > 32767 ) l = 32767; |
1437 | if( l < -32768 ) l = -32768; |
1438 | if( r > 32767 ) r = 32767; |
1439 | if( r < -32768 ) r = -32768; |
1440 | |
1441 | // Store the final sample. |
1442 | outbuffer[(i*2)] = l; |
1443 | outbuffer[(i*2)+1] = r; |
1444 | |
1445 | ll = tl; |
1446 | lr = tr; |
1447 | |
1448 | } |
1449 | |
1450 | modctx->last_l_sample = ll; |
1451 | modctx->last_r_sample = lr; |
1452 | |
1453 | modctx->samplenb = modctx->samplenb+nbsample; |
1454 | } |
1455 | else |
1456 | { |
1457 | for (i = 0; i < nbsample; i++) |
1458 | { |
1459 | // Mod not loaded. Return blank buffer. |
1460 | outbuffer[(i*2)] = 0; |
1461 | outbuffer[(i*2)+1] = 0; |
1462 | } |
1463 | |
1464 | if(trkbuf) |
1465 | { |
1466 | trkbuf->nb_of_state = 0; |
1467 | trkbuf->cur_rd_index = 0; |
1468 | trkbuf->name[0] = 0; |
1469 | memclear(trkbuf->track_state_buf, 0, sizeof(tracker_state) * trkbuf->nb_max_of_state); |
1470 | memclear(trkbuf->instruments, 0, sizeof(trkbuf->instruments)); |
1471 | } |
1472 | } |
1473 | } |
1474 | } |
1475 | |
1476 | //resets internals for mod context |
1477 | static bool jar_mod_reset( jar_mod_context_t * modctx) |
1478 | { |
1479 | if(modctx) |
1480 | { |
1481 | memclear(&modctx->song, 0, sizeof(modctx->song)); |
1482 | memclear(&modctx->sampledata, 0, sizeof(modctx->sampledata)); |
1483 | memclear(&modctx->patterndata, 0, sizeof(modctx->patterndata)); |
1484 | modctx->tablepos = 0; |
1485 | modctx->patternpos = 0; |
1486 | modctx->patterndelay = 0; |
1487 | modctx->jump_loop_effect = 0; |
1488 | modctx->bpm = 0; |
1489 | modctx->patternticks = 0; |
1490 | modctx->patterntickse = 0; |
1491 | modctx->patternticksaim = 0; |
1492 | modctx->sampleticksconst = 0; |
1493 | modctx->samplenb = 0; |
1494 | memclear(modctx->channels, 0, sizeof(modctx->channels)); |
1495 | modctx->number_of_channels = 0; |
1496 | modctx->mod_loaded = 0; |
1497 | modctx->last_r_sample = 0; |
1498 | modctx->last_l_sample = 0; |
1499 | |
1500 | return jar_mod_init(modctx); |
1501 | } |
1502 | return 0; |
1503 | } |
1504 | |
1505 | void jar_mod_unload( jar_mod_context_t * modctx) |
1506 | { |
1507 | if(modctx) |
1508 | { |
1509 | if(modctx->modfile) |
1510 | { |
1511 | JARMOD_FREE(modctx->modfile); |
1512 | modctx->modfile = 0; |
1513 | modctx->modfilesize = 0; |
1514 | modctx->loopcount = 0; |
1515 | } |
1516 | jar_mod_reset(modctx); |
1517 | } |
1518 | } |
1519 | |
1520 | mulong jar_mod_load_file(jar_mod_context_t * modctx, const char* filename) |
1521 | { |
1522 | mulong fsize = 0; |
1523 | if(modctx->modfile) |
1524 | { |
1525 | JARMOD_FREE(modctx->modfile); |
1526 | modctx->modfile = 0; |
1527 | } |
1528 | |
1529 | FILE *f = fopen(filename, "rb" ); |
1530 | if(f) |
1531 | { |
1532 | fseek(f,0,SEEK_END); |
1533 | fsize = ftell(f); |
1534 | fseek(f,0,SEEK_SET); |
1535 | |
1536 | if(fsize && fsize < 32*1024*1024) |
1537 | { |
1538 | modctx->modfile = JARMOD_MALLOC(fsize); |
1539 | modctx->modfilesize = fsize; |
1540 | memset(modctx->modfile, 0, fsize); |
1541 | fread(modctx->modfile, fsize, 1, f); |
1542 | fclose(f); |
1543 | |
1544 | if(!jar_mod_load(modctx, (void*)modctx->modfile, fsize)) fsize = 0; |
1545 | } else fsize = 0; |
1546 | } |
1547 | return fsize; |
1548 | } |
1549 | |
1550 | mulong jar_mod_current_samples(jar_mod_context_t * modctx) |
1551 | { |
1552 | if(modctx) |
1553 | return modctx->samplenb; |
1554 | |
1555 | return 0; |
1556 | } |
1557 | |
1558 | // Works, however it is very slow, this data should be cached to ensure it is run only once per file |
1559 | mulong jar_mod_max_samples(jar_mod_context_t * ctx) |
1560 | { |
1561 | mint buff[2]; |
1562 | mulong len; |
1563 | mulong lastcount = ctx->loopcount; |
1564 | |
1565 | while(ctx->loopcount <= lastcount) |
1566 | jar_mod_fillbuffer(ctx, buff, 1, 0); |
1567 | |
1568 | len = ctx->samplenb; |
1569 | jar_mod_seek_start(ctx); |
1570 | |
1571 | return len; |
1572 | } |
1573 | |
1574 | // move seek_val to sample index, 0 -> jar_mod_max_samples is the range |
1575 | void jar_mod_seek_start(jar_mod_context_t * ctx) |
1576 | { |
1577 | if(ctx && ctx->modfile) |
1578 | { |
1579 | muchar* ftmp = ctx->modfile; |
1580 | mulong stmp = ctx->modfilesize; |
1581 | muint lcnt = ctx->loopcount; |
1582 | |
1583 | if(jar_mod_reset(ctx)){ |
1584 | jar_mod_load(ctx, ftmp, stmp); |
1585 | ctx->modfile = ftmp; |
1586 | ctx->modfilesize = stmp; |
1587 | ctx->loopcount = lcnt; |
1588 | } |
1589 | } |
1590 | } |
1591 | |
1592 | #endif // end of JAR_MOD_IMPLEMENTATION |
1593 | //------------------------------------------------------------------------------- |
1594 | |
1595 | |
1596 | #endif //end of header file |