3 Ann Hell Ex Machina - Music Software
4 Copyright (C) 2003/2005 Angel Ortega <angel@triptico.com>
6 ss_song.c - Software synth song event stream management
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 2
11 of the License, or (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 http://www.triptico.com
41 song_ev_type type
; /* event type */
42 int frame
; /* frame number (time) */
43 int trk_id
; /* track id */
48 song_ev_type type
; /* SONG_EV_NOTE_OFF */
51 int note_id
; /* note id */
56 song_ev_type type
; /* SONG_EV_NOTE_ON */
59 int note_id
; /* note id */
60 int note
; /* MIDI-like note */
61 float vol
; /* volume */
64 struct ss_ev_ss_sustain
66 song_ev_type type
; /* SONG_EV_SS_SUSTAIN */
69 double sustain
; /* sustain time (in frames) */
72 struct ss_ev_ss_vibrato
74 song_ev_type type
; /* SONG_EV_SS_VIBRATO */
77 double vib_depth
; /* vibrato depth (in msecs) */
78 double vib_freq
; /* vibrato frequency (in Hzs) */
81 struct ss_ev_ss_channel
83 song_ev_type type
; /* SONG_EV_SS_CHANNEL */
86 int channel
; /* channel */
87 float vol
; /* volume */
92 song_ev_type type
; /* SONG_EV_SS_WAV */
95 char * file
; /* path to .wav file */
96 int base
; /* MIDI-like base note */
97 int min
; /* MIDI-like minimum note */
98 int max
; /* MIDI-like maximum note */
99 double loop_start
; /* loop start */
100 double loop_end
; /* loop end */
105 song_ev_type type
; /* SONG_EV_SS_PAT */
108 char * file
; /* path to .pat file */
113 song_ev_type type
; /* SONG_EV_TEMPO */
116 double tempo
; /* tempo in bmp */
119 struct ss_ev_pitch_stretch
121 song_ev_type type
; /* SONG_EV_SS_PITCH_STRETCH */
124 int note_id
; /* note id */
125 int note
; /* MIDI-like note (to find the wave) */
126 double len
; /* note length (1: whole note) */
127 float vol
; /* note volume (1: full volume) */
132 song_ev_type type
; /* effect type */
135 int channel
; /* channel */
136 double size
; /* size of effect */
137 float gain
; /* gain */
138 double depth
; /* depth */
139 double freq
; /* freq */
140 double phase
; /* phase */
141 float initial
; /* initial vol */
142 float final
; /* final vol */
147 struct ss_ev_generic generic
;
148 struct ss_ev_note_on note_on
;
149 struct ss_ev_note_off note_off
;
150 struct ss_ev_ss_sustain ss_sustain
;
151 struct ss_ev_ss_vibrato ss_vibrato
;
152 struct ss_ev_ss_channel ss_channel
;
153 struct ss_ev_ss_wav ss_wav
;
154 struct ss_ev_ss_pat ss_pat
;
155 struct ss_ev_ss_eff ss_eff
;
156 struct ss_ev_tempo tempo
;
157 struct ss_ev_pitch_stretch ss_pitch_stretch
;
160 /* the softsynth song stream */
162 static union ss_ev
* ss_song
=NULL
;
163 static int n_ss_ev
=0;
166 /* the instruments */
168 #define SONG_INS_NUM 256
169 struct ss_ins song_ins
[SONG_INS_NUM
];
174 ********************/
176 static void add_ss_ev(union ss_ev
* e
)
177 /* adds a softsynth song event */
180 ss_song
=(union ss_ev
*)realloc(ss_song
,
181 (n_ss_ev
+ 1) * sizeof(union ss_ev
));
184 memcpy(&ss_song
[n_ss_ev
], e
, sizeof(union ss_ev
));
190 static int ss_ev_cmp(const void * v1
, const void * v2
)
191 /* softsynth song event compare function for qsort() */
193 struct ss_ev_generic
* e1
;
194 struct ss_ev_generic
* e2
;
196 e1
=(struct ss_ev_generic
*)v1
; e2
=(struct ss_ev_generic
*)v2
;
198 if(e1
->frame
== e2
->frame
)
199 return(e1
->type
- e2
->type
);
201 return(e1
->frame
- e2
->frame
);
205 static int ss_song_convert_events(void)
206 /* converts generic song_ev events to softsynth events */
212 double fpw
, time_ac
, time_ac_m
;
217 /* resets the ss stream */
234 /* travels the song events generating softsynth song events */
235 for(n
=0;n
< n_song_ev
;n
++)
237 /* gets the song event */
240 /* calculates the frame */
241 frame
=((e
->generic
.time
- time_ac
) * fpw
) + frame_ac
;
243 /* generic event data */
244 sse
.generic
.type
=e
->generic
.type
;
245 sse
.generic
.frame
=frame
;
246 sse
.generic
.trk_id
=e
->generic
.trk_id
;
248 /* account the biggest track seen */
249 if(b_track
< e
->generic
.trk_id
) b_track
=e
->generic
.trk_id
;
251 switch(e
->generic
.type
)
255 /* updates accumulations */
257 time_ac
+= e
->generic
.time
;
259 /* calculates frames-per-whole based on new tempo */
260 fpw
=(double) ss_frequency
* 60.0;
261 fpw
/= e
->tempo
.tempo
/ 4.0;
264 sse
.tempo
.tempo
=e
->tempo
.tempo
;
271 /* just store the values */
274 time_ac_m
=e
->meter
.time
;
278 case SONG_EV_MEASURE
:
280 song_test_measure_boundary(e
->measure
.time
- time_ac_m
,
281 num
, den
, e
->measure
.line
);
286 /* convert to note on / off pairs */
288 sse
.note_on
.type
=SONG_EV_NOTE_ON
;
289 sse
.note_on
.note_id
=note_id
++;
290 sse
.note_on
.note
=e
->note
.note
;
291 sse
.note_on
.vol
=e
->note
.vol
;
295 frame
+= (int)(e
->note
.len
* fpw
);
297 sse
.note_off
.type
=SONG_EV_NOTE_OFF
;
298 sse
.note_off
.frame
=frame
;
303 case SONG_EV_SS_PITCH_STRETCH
:
305 sse
.ss_pitch_stretch
.note_id
=note_id
++;
306 sse
.ss_pitch_stretch
.note
=e
->ss_pitch_stretch
.note
;
307 sse
.ss_pitch_stretch
.len
=e
->ss_pitch_stretch
.len
;
308 sse
.ss_pitch_stretch
.vol
=e
->ss_pitch_stretch
.vol
;
312 frame
+= (int)(e
->ss_pitch_stretch
.len
* fpw
);
314 sse
.note_off
.type
=SONG_EV_NOTE_OFF
;
315 sse
.note_off
.frame
=frame
;
322 sse
.ss_wav
.file
=e
->ss_wav
.file
;
323 sse
.ss_wav
.base
=e
->ss_wav
.base
;
324 sse
.ss_wav
.min
=e
->ss_wav
.min
;
325 sse
.ss_wav
.max
=e
->ss_wav
.max
;
326 sse
.ss_wav
.loop_start
=e
->ss_wav
.loop_start
;
327 sse
.ss_wav
.loop_end
=e
->ss_wav
.loop_end
;
334 sse
.ss_pat
.file
=e
->ss_pat
.file
;
339 case SONG_EV_SS_SUSTAIN
:
341 sse
.ss_sustain
.sustain
=e
->ss_sustain
.sustain
;
346 case SONG_EV_SS_VIBRATO
:
348 sse
.ss_vibrato
.vib_depth
=e
->ss_vibrato
.vib_depth
;
349 sse
.ss_vibrato
.vib_freq
=e
->ss_vibrato
.vib_freq
;
354 case SONG_EV_SS_CHANNEL
:
356 sse
.ss_channel
.channel
=e
->ss_channel
.channel
;
357 sse
.ss_channel
.vol
=e
->ss_channel
.vol
;
362 case SONG_EV_SS_EFF_DELAY
:
363 case SONG_EV_SS_EFF_ECHO
:
364 case SONG_EV_SS_EFF_COMB
:
365 case SONG_EV_SS_EFF_ALLPASS
:
366 case SONG_EV_SS_EFF_FLANGER
:
367 case SONG_EV_SS_EFF_WOBBLE
:
368 case SONG_EV_SS_EFF_SQWOBBLE
:
369 case SONG_EV_SS_EFF_FADER
:
370 case SONG_EV_SS_EFF_REVERB
:
371 case SONG_EV_SS_EFF_OFF
:
373 sse
.ss_eff
.channel
=e
->ss_eff
.channel
;
374 sse
.ss_eff
.size
=e
->ss_eff
.size
;
375 sse
.ss_eff
.gain
=e
->ss_eff
.gain
;
376 sse
.ss_eff
.depth
=e
->ss_eff
.depth
;
377 sse
.ss_eff
.freq
=e
->ss_eff
.freq
;
378 sse
.ss_eff
.phase
=e
->ss_eff
.phase
;
379 sse
.ss_eff
.initial
=e
->ss_eff
.initial
;
380 sse
.ss_eff
.final
=e
->ss_eff
.final
;
385 case SONG_EV_MIDI_CHANNEL
:
386 case SONG_EV_MIDI_PROGRAM
:
391 case SONG_EV_NOTE_ON
:
392 case SONG_EV_NOTE_OFF
:
395 /* never found in generic song streams */
400 /* generates an end of event mark, a time after the last one */
401 sse
.generic
.type
=SONG_EV_END
;
402 sse
.generic
.frame
=frame
+ ss_frequency
;
406 qsort(ss_song
, n_ss_ev
, sizeof(union ss_ev
), ss_ev_cmp
);
408 /* return the number of tracks */
413 int ss_song_render(void)
419 float output
[SS_MAX_CHANNELS
];
424 /* convert the song to ss events */
425 n_tracks
=ss_song_convert_events();
431 /* init the instruments */
432 for(n
=0;n
< n_tracks
;n
++)
433 ss_ins_init(&song_ins
[n
]);
435 /* loop the events */
438 /* process all events for this exact frame */
439 while(e
->generic
.frame
== frame
)
441 /* take the instrument */
442 if(e
->generic
.trk_id
== -1)
445 i
=&song_ins
[e
->generic
.trk_id
];
447 switch(e
->generic
.type
)
449 case SONG_EV_NOTE_ON
:
451 ss_ins_note_on(i
, e
->note_on
.note
,
452 e
->note_on
.vol
, e
->note_on
.note_id
);
456 case SONG_EV_NOTE_OFF
:
458 ss_ins_note_off(i
, e
->note_off
.note_id
);
462 case SONG_EV_SS_SUSTAIN
:
464 ss_ins_set_sustain(i
, e
->ss_sustain
.sustain
);
468 case SONG_EV_SS_VIBRATO
:
470 ss_ins_set_vibrato(i
, e
->ss_vibrato
.vib_depth
,
471 e
->ss_vibrato
.vib_freq
);
475 case SONG_EV_SS_CHANNEL
:
477 ss_ins_set_channel(i
, e
->ss_channel
.channel
,
487 w
=ss_load_wav_file(e
->ss_wav
.file
,
488 ss_note_frequency(e
->ss_wav
.base
),
489 ss_note_frequency(e
->ss_wav
.min
),
490 ss_note_frequency(e
->ss_wav
.max
),
491 e
->ss_wav
.loop_start
,
494 ss_ins_add_layer(i
, w
);
501 ss_load_pat_file(i
, e
->ss_pat
.file
);
504 case SONG_EV_SS_EFF_DELAY
:
506 ss_eff_delay(&i
->effs
[e
->ss_eff
.channel
],
510 case SONG_EV_SS_EFF_ECHO
:
512 ss_eff_echo(&i
->effs
[e
->ss_eff
.channel
],
513 e
->ss_eff
.size
, e
->ss_eff
.gain
);
516 case SONG_EV_SS_EFF_COMB
:
518 ss_eff_comb(&i
->effs
[e
->ss_eff
.channel
],
519 e
->ss_eff
.size
, e
->ss_eff
.gain
);
522 case SONG_EV_SS_EFF_ALLPASS
:
524 ss_eff_allpass(&i
->effs
[e
->ss_eff
.channel
],
525 e
->ss_eff
.size
, e
->ss_eff
.gain
);
528 case SONG_EV_SS_EFF_FLANGER
:
530 ss_eff_flanger(&i
->effs
[e
->ss_eff
.channel
],
531 e
->ss_eff
.size
, e
->ss_eff
.gain
,
532 e
->ss_eff
.depth
, e
->ss_eff
.freq
,
536 case SONG_EV_SS_EFF_WOBBLE
:
538 ss_eff_wobble(&i
->effs
[e
->ss_eff
.channel
],
539 e
->ss_eff
.freq
, e
->ss_eff
.phase
);
543 case SONG_EV_SS_EFF_SQWOBBLE
:
545 ss_eff_square_wobble(&i
->effs
[e
->ss_eff
.channel
],
546 e
->ss_eff
.freq
, e
->ss_eff
.phase
);
550 case SONG_EV_SS_EFF_FADER
:
552 ss_eff_fader(&i
->effs
[e
->ss_eff
.channel
],
553 e
->ss_eff
.size
, e
->ss_eff
.initial
,
557 case SONG_EV_SS_EFF_REVERB
:
559 ss_eff_reverb(&i
->effs
[e
->ss_eff
.channel
]);
562 case SONG_EV_SS_EFF_OFF
:
564 ss_eff_off(&i
->effs
[e
->ss_eff
.channel
]);
569 /* just store the last tempo */
570 tempo
=e
->tempo
.tempo
;
573 case SONG_EV_SS_PITCH_STRETCH
:
581 freq
=ss_note_frequency(e
->ss_pitch_stretch
.note
);
582 w
=ss_ins_find_layer(i
, freq
, &n
);
584 /* calculate optimal frequency */
585 freq
=ss_pitch_from_tempo(w
, tempo
, e
->ss_pitch_stretch
.len
);
588 ss_ins_play(i
, freq
, e
->ss_pitch_stretch
.vol
,
589 e
->ss_pitch_stretch
.note_id
, w
);
599 case SONG_EV_MIDI_CHANNEL
:
600 case SONG_EV_MIDI_PROGRAM
:
603 case SONG_EV_MEASURE
:
605 /* never found in ss song streams */
613 /* reset frame samples */
614 ss_output_init_frame(output
);
616 /* generate output from all instruments */
617 for(n
=0;n
< n_tracks
;n
++)
618 ss_ins_frame(&song_ins
[n
], output
);
620 /* dump to sampling driver */
621 ss_output_write(output
);