3 Ann Hell Ex Machina - Music Software
4 Copyright (C) 2003/2008 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
39 /* the softsynth song stream */
41 static struct song_ev
*ss_song
= NULL
;
42 static int n_ss_ev
= 0;
46 struct ss_ins ss_song_ins
[SS_MAX_INSTRUMENTS
];
52 static struct song_ev
* add_ss_ev(const struct song_ev
*e
)
53 /* adds a softsynth song event */
55 return copy_event(&ss_song
, &n_ss_ev
, e
);
59 static int frame_type_eventid_cmp(const void *v1
, const void *v2
)
60 /* softsynth song event compare function for qsort() */
66 e1
= (struct song_ev
*) v1
;
67 e2
= (struct song_ev
*) v2
;
69 ret
= e1
->frame
- e2
->frame
;
72 ret
= e1
->type
- e2
->type
;
75 ret
= e1
->event_id
- e2
->event_id
;
81 static void ss_song_convert_events(int *n_channels
)
82 /* converts generic song_ev events to softsynth events */
86 int frame
, frame_ac
, f_frame
;
87 double fpw
, time_ac
, time_ac_m
;
93 /* resets the ss stream */
94 if (ss_song
!= NULL
) {
105 frame
= frame_ac
= f_frame
= 0;
106 time_ac
= time_ac_m
= 0;
109 /* travels the song events generating softsynth song events */
110 for (n
= 0; n
< n_song_ev
; n
++) {
111 /* gets the song event */
114 /* calculates the frame */
115 frame
= ((e
->time
- time_ac
) * fpw
) + frame_ac
;
121 /* updates accumulations */
125 /* calculates frames-per-whole based on new tempo */
126 fpw
= (double) ss_frequency
* 60.0;
127 fpw
/= e
->amount
/ 4.0;
135 /* just store the values */
142 case SONG_EV_MEASURE
:
144 song_test_measure_boundary(e
->time
- time_ac_m
,
150 /* assign a note id */
151 e
->note_id
= note_id
++;
156 /* copy again, but set as NOTE_OFF */
158 e
->type
= SONG_EV_NOTE_OFF
;
160 frame
+= (int) (e
->len
* fpw
);
167 /* move the cursor back */
169 frame_ac
-= (int) (e
->len
* fpw
);
173 case SONG_EV_SS_PITCH_STRETCH
:
175 /* assign a note id */
176 e
->note_id
= note_id
++;
181 /* and copy again, as a note off */
183 e
->type
= SONG_EV_NOTE_OFF
;
185 frame
+= (int) (e
->len
* fpw
);
190 case SONG_EV_SS_PRINT_WAVE_TEMPO
:
194 case SONG_EV_SS_SUSTAIN
:
195 case SONG_EV_SS_ATTACK
:
196 case SONG_EV_SS_VIBRATO
:
197 case SONG_EV_SS_PORTAMENTO
:
198 case SONG_EV_SS_EFF_DELAY
:
199 case SONG_EV_SS_EFF_ECHO
:
200 case SONG_EV_SS_EFF_COMB
:
201 case SONG_EV_SS_EFF_ALLPASS
:
202 case SONG_EV_SS_EFF_FLANGER
:
203 case SONG_EV_SS_EFF_WOBBLE
:
204 case SONG_EV_SS_EFF_SQWOBBLE
:
205 case SONG_EV_SS_EFF_HFWOBBLE
:
206 case SONG_EV_SS_EFF_FADER
:
207 case SONG_EV_SS_EFF_REVERB
:
208 case SONG_EV_SS_EFF_FOLDBACK
:
209 case SONG_EV_SS_EFF_ATAN
:
210 case SONG_EV_SS_EFF_DISTORT
:
211 case SONG_EV_SS_EFF_OVERDRIVE
:
212 case SONG_EV_SS_EFF_OFF
:
213 case SONG_EV_SS_MASTER_VOLUME
:
214 case SONG_EV_SONG_INFO
:
221 case SONG_EV_SS_CHANNEL
:
224 if (*n_channels
< e
->channel
)
225 *n_channels
= e
->channel
;
231 case SONG_EV_MIDI_CHANNEL
:
232 case SONG_EV_MIDI_PROGRAM
:
237 case SONG_EV_NOTE_OFF
:
240 /* never found in generic song streams */
244 /* store the further frame seen */
249 /* generates an end of event mark, a time after the last one */
250 e
= add_event(&ss_song
, &n_ss_ev
);
252 e
->type
= SONG_EV_END
;
253 e
->frame
= f_frame
+ ss_frequency
;
257 qsort(ss_song
, n_ss_ev
, sizeof(struct song_ev
), frame_type_eventid_cmp
);
264 static const struct song_ev
*process_this_frame_events(const struct song_ev
*e
, int skip_frames
)
265 /* process the events attached to this frame */
267 static double tempo
= 120.0;
268 static int frame
= 0;
270 /* from the beginning? */
277 if (verbose
>= 1 && frame
% ss_frequency
== 0) {
278 int m
= frame
/ ss_frequency
;
279 printf("[%02d:%02d]\r", m
/ 60, m
% 60);
283 while (e
!= NULL
&& e
->frame
== frame
) {
288 if (e
->type
== SONG_EV_NOTE
||
289 e
->type
== SONG_EV_NOTE_OFF
||
290 e
->type
== SONG_EV_SS_PITCH_STRETCH
) {
291 if (frame
< skip_frames
) {
298 /* take the instrument */
302 i
= &ss_song_ins
[e
->trk_id
];
307 if (ss_ins_note_on(i
, e
->value
, e
->vol
, e
->note_id
) < 0 &&
309 printf("ss_ins_note_on error: track %d note %d\n",
310 e
->trk_id
, e
->value
);
314 case SONG_EV_NOTE_OFF
:
316 ss_ins_note_off(i
, e
->note_id
);
320 case SONG_EV_SS_SUSTAIN
:
322 ss_ins_set_sustain(i
, e
->amount
);
326 case SONG_EV_SS_ATTACK
:
328 ss_ins_set_attack(i
, e
->amount
);
332 case SONG_EV_SS_VIBRATO
:
334 ss_ins_set_vibrato(i
, e
->depth
, e
->freq
);
338 case SONG_EV_SS_PORTAMENTO
:
340 ss_ins_set_portamento(i
, (e
->amount
* 44100.0)
341 / ((double) ss_frequency
* 1000000.0));
345 case SONG_EV_SS_CHANNEL
:
347 ss_ins_set_channel(i
, e
->channel
, e
->vol
);
353 w
= ss_load_wav_file(e
->name
,
354 ss_note_frequency(e
->value
),
355 ss_note_frequency(e
->min
),
356 ss_note_frequency(e
->max
),
358 e
->channel
, e
->skip_channels
);
360 /* fail if can't open wav */
362 printf("Can't load wav '%s'\n", e
->name
);
366 ss_ins_add_layer(i
, w
);
372 if (ss_load_pat_file(i
, e
->name
) < 0) {
373 printf("Can't load pat '%s'\n", e
->name
);
381 if (ss_load_sf2_file(i
, e
->name
, e
->str2
) < 0) {
382 printf("Can't load instrument from sf2 '%s'\n", e
->name
);
388 case SONG_EV_SS_EFF_DELAY
:
390 ss_eff_delay(&i
->effs
[e
->channel
], e
->len
);
393 case SONG_EV_SS_EFF_ECHO
:
395 ss_eff_echo(&i
->effs
[e
->channel
], e
->len
, e
->vol
);
398 case SONG_EV_SS_EFF_COMB
:
400 ss_eff_comb(&i
->effs
[e
->channel
], e
->len
, e
->vol
);
403 case SONG_EV_SS_EFF_ALLPASS
:
405 ss_eff_allpass(&i
->effs
[e
->channel
], e
->len
, e
->vol
);
408 case SONG_EV_SS_EFF_FLANGER
:
410 ss_eff_flanger(&i
->effs
[e
->channel
],
411 e
->len
, e
->vol
, e
->depth
, e
->freq
, e
->phase
);
414 case SONG_EV_SS_EFF_WOBBLE
:
416 ss_eff_wobble(&i
->effs
[e
->channel
], e
->freq
, e
->phase
, e
->vol
);
420 case SONG_EV_SS_EFF_SQWOBBLE
:
422 ss_eff_square_wobble(&i
->effs
[e
->channel
], e
->freq
, e
->phase
);
426 case SONG_EV_SS_EFF_HFWOBBLE
:
428 ss_eff_half_wobble(&i
->effs
[e
->channel
], e
->freq
, e
->phase
);
432 case SONG_EV_SS_EFF_FADER
:
434 ss_eff_fader(&i
->effs
[e
->channel
], e
->len
, e
->initial
, e
->final
);
437 case SONG_EV_SS_EFF_REVERB
:
439 ss_eff_reverb(&i
->effs
[e
->channel
]);
442 case SONG_EV_SS_EFF_FOLDBACK
:
444 ss_eff_foldback(&i
->effs
[e
->channel
], e
->vol
);
447 case SONG_EV_SS_EFF_ATAN
:
449 ss_eff_atan(&i
->effs
[e
->channel
], e
->vol
);
452 case SONG_EV_SS_EFF_DISTORT
:
454 ss_eff_distort(&i
->effs
[e
->channel
], e
->vol
);
457 case SONG_EV_SS_EFF_OVERDRIVE
:
459 ss_eff_overdrive(&i
->effs
[e
->channel
], e
->vol
);
462 case SONG_EV_SS_EFF_OFF
:
464 ss_eff_off(&i
->effs
[e
->channel
]);
469 /* just store the last tempo */
473 case SONG_EV_SS_PITCH_STRETCH
:
476 freq
= ss_note_frequency(e
->value
);
477 w
= ss_ins_find_layer(i
, freq
, NULL
);
479 /* calculate optimal frequency */
480 freq
= ss_pitch_from_tempo(w
, tempo
, e
->len
);
483 if (ss_ins_play(i
, freq
, e
->vol
,
484 e
->note_id
, w
) < 0 && verbose
>= 1)
485 printf("ss_ins_play error: track %d freq %f\n",
490 case SONG_EV_SS_PRINT_WAVE_TEMPO
:
493 freq
= ss_note_frequency(e
->value
);
494 w
= ss_ins_find_layer(i
, freq
, NULL
);
496 /* print the optimal tempo */
497 printf("Optimal tempo: %lf\n",
498 ss_tempo_from_wave(w
, e
->value
, e
->len
));
502 case SONG_EV_SS_MASTER_VOLUME
:
504 /* set master volume */
505 ss_master_volume
= e
->vol
;
508 case SONG_EV_SONG_INFO
:
510 /* add a new song (track) */
511 cue_file_song_info(frame
, e
->str2
, e
->name
);
516 /* end of track; trigger possible cleaning */
526 case SONG_EV_MIDI_CHANNEL
:
527 case SONG_EV_MIDI_PROGRAM
:
529 case SONG_EV_MEASURE
:
532 /* never found in ss song streams */
547 int ss_song_render(int skip_secs
, const char *driver
, const char *devfile
)
550 sample_t output
[SS_MAX_CHANNELS
];
553 const struct song_ev
*e
= NULL
;
555 /* convert the song to ss events */
556 ss_song_convert_events(&n_channels
);
559 printf("Tracks: %d Channels: %d Events: %d\n",
560 n_song_tracks
, n_channels
, n_ss_ev
);
563 printf("** SOFTWARE SYNTHESIZER EVENT DUMP **\n\n");
564 dump_song_events(ss_song
, n_ss_ev
);
568 /* set the number of channels, unless forced */
569 if (ss_nchannels
== -1)
570 ss_nchannels
= n_channels
> 0 ? n_channels
: 2;
572 if (ss_output_open(driver
, devfile
) < 0) {
573 printf("Error: can't init driver\n");
577 /* init the generators */
580 /* init the instruments */
581 for (n
= 0; n
< n_song_tracks
; n
++)
582 ss_ins_init(&ss_song_ins
[n
]);
584 /* calculate the frame to start playing */
585 skip_frames
= skip_secs
* ss_frequency
;
589 /* process all events in this frame */
590 e
= process_this_frame_events(e
, skip_frames
);
592 /* reset frame samples */
593 ss_output_init_frame(output
);
595 /* generate output from all instruments */
596 for (n
= i
= 0; n
< n_song_tracks
; n
++)
597 i
+= ss_ins_frame(&ss_song_ins
[n
], output
);
599 /* dump to sampling driver */
600 ss_output_write(output
);