3 Ann Hell Ex Machina - Music Software
4 Copyright (C) 2003/2006 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 */
44 int event_id
; /* event id */
49 song_ev_type type
; /* SONG_EV_NOTE_OFF */
53 int note_id
; /* note id */
58 song_ev_type type
; /* SONG_EV_NOTE_ON */
62 int note_id
; /* note id */
63 int note
; /* MIDI-like note */
64 sample_t vol
; /* volume */
67 struct ss_ev_ss_sustain
69 song_ev_type type
; /* SONG_EV_SS_SUSTAIN */
73 double sustain
; /* sustain time (in frames) */
76 struct ss_ev_ss_vibrato
78 song_ev_type type
; /* SONG_EV_SS_VIBRATO */
82 double vib_depth
; /* vibrato depth (in msecs) */
83 double vib_freq
; /* vibrato frequency (in Hzs) */
86 struct ss_ev_ss_portamento
88 song_ev_type type
; /* SONG_EV_SS_PORTAMENTO */
92 double portamento
; /* portamento */
95 struct ss_ev_ss_channel
97 song_ev_type type
; /* SONG_EV_SS_CHANNEL */
101 int channel
; /* channel */
102 sample_t vol
; /* volume */
107 song_ev_type type
; /* SONG_EV_SS_WAV */
111 char * file
; /* path to .wav file */
112 int base
; /* MIDI-like base note */
113 int min
; /* MIDI-like minimum note */
114 int max
; /* MIDI-like maximum note */
115 double loop_start
; /* loop start */
116 double loop_end
; /* loop end */
117 int first_channel
; /* first channel to start spreading */
118 int skip_channels
; /* channels to skip when spreading */
123 song_ev_type type
; /* SONG_EV_SS_PAT */
127 char * file
; /* path to .pat file */
132 song_ev_type type
; /* SONG_EV_TEMPO */
136 double tempo
; /* tempo in bmp */
139 struct ss_ev_pitch_stretch
141 song_ev_type type
; /* SONG_EV_SS_PITCH_STRETCH */
145 int note_id
; /* note id */
146 int note
; /* MIDI-like note (to find the wave) */
147 double len
; /* note length (1: whole note) */
148 sample_t vol
; /* note volume (1: full volume) */
151 struct ss_ev_print_wave_tempo
153 song_ev_type type
; /* SONG_EV_SS_PRINT_WAVE_TEMPO */
157 int note_id
; /* note id */
158 int note
; /* MIDI-like note (to find the wave) */
159 double len
; /* note length (1: whole note) */
164 song_ev_type type
; /* effect type */
168 int channel
; /* channel */
169 double size
; /* size of effect */
170 sample_t gain
; /* gain */
171 double depth
; /* depth */
172 double freq
; /* freq */
173 double phase
; /* phase */
174 sample_t initial
; /* initial vol */
175 sample_t final
; /* final vol */
178 struct ss_ev_song_info
180 song_ev_type type
; /* SONG_EV_SONG_INFO */
184 char * author
; /* track author */
185 char * name
; /* track name */
190 struct ss_ev_generic generic
;
191 struct ss_ev_note_on note_on
;
192 struct ss_ev_note_off note_off
;
193 struct ss_ev_ss_sustain ss_sustain
;
194 struct ss_ev_ss_vibrato ss_vibrato
;
195 struct ss_ev_ss_portamento ss_portamento
;
196 struct ss_ev_ss_channel ss_channel
;
197 struct ss_ev_ss_wav ss_wav
;
198 struct ss_ev_ss_pat ss_pat
;
199 struct ss_ev_ss_eff ss_eff
;
200 struct ss_ev_tempo tempo
;
201 struct ss_ev_pitch_stretch ss_pitch_stretch
;
202 struct ss_ev_print_wave_tempo ss_print_wave_tempo
;
203 struct ss_ev_song_info song_info
;
206 /* the softsynth song stream */
208 static union ss_ev
* ss_song
= NULL
;
209 static int n_ss_ev
= 0;
212 /* the instruments */
214 struct ss_ins ss_song_ins
[SS_MAX_INSTRUMENTS
];
218 ********************/
220 static void add_ss_ev(union ss_ev
* e
)
221 /* adds a softsynth song event */
223 GROW(ss_song
, n_ss_ev
, union ss_ev
);
226 memcpy(&ss_song
[n_ss_ev
], e
, sizeof(union ss_ev
));
232 static int ss_ev_cmp(const void * v1
, const void * v2
)
233 /* softsynth song event compare function for qsort() */
235 struct ss_ev_generic
* e1
;
236 struct ss_ev_generic
* e2
;
239 e1
= (struct ss_ev_generic
*)v1
; e2
= (struct ss_ev_generic
*)v2
;
241 ret
= e1
->frame
- e2
->frame
;
244 ret
= e1
->type
- e2
->type
;
247 ret
= e1
->event_id
- e2
->event_id
;
253 static void ss_song_convert_events(int * n_channels
)
254 /* converts generic song_ev events to softsynth events */
259 int frame
, frame_ac
, f_frame
;
260 double fpw
, time_ac
, time_ac_m
;
266 /* resets the ss stream */
279 frame
= frame_ac
= f_frame
= 0;
280 time_ac
= time_ac_m
= 0;
283 /* travels the song events generating softsynth song events */
284 for(n
= 0;n
< n_song_ev
;n
++)
286 /* gets the song event */
289 /* calculates the frame */
290 frame
= ((e
->generic
.time
- time_ac
) * fpw
) + frame_ac
;
292 /* generic event data */
293 sse
.generic
.type
= e
->generic
.type
;
294 sse
.generic
.frame
= frame
;
295 sse
.generic
.trk_id
= e
->generic
.trk_id
;
296 sse
.generic
.event_id
= e
->generic
.event_id
;
298 switch(e
->generic
.type
)
302 /* updates accumulations */
304 time_ac
= e
->generic
.time
;
306 /* calculates frames-per-whole based on new tempo */
307 fpw
= (double) ss_frequency
* 60.0;
308 fpw
/= e
->tempo
.tempo
/ 4.0;
311 sse
.tempo
.tempo
= e
->tempo
.tempo
;
318 /* just store the values */
321 time_ac_m
= e
->meter
.time
;
325 case SONG_EV_MEASURE
:
327 song_test_measure_boundary(e
->measure
.time
- time_ac_m
,
328 num
, den
, e
->measure
.line
);
333 /* convert to note on / off pairs */
335 sse
.note_on
.type
= SONG_EV_NOTE_ON
;
336 sse
.note_on
.note_id
= note_id
++;
337 sse
.note_on
.note
= e
->note
.note
;
338 sse
.note_on
.vol
= e
->note
.vol
;
342 frame
+= (int)(e
->note
.len
* fpw
);
344 sse
.note_off
.type
= SONG_EV_NOTE_OFF
;
345 sse
.note_off
.frame
= frame
;
352 /* move the cursor back */
354 frame_ac
-= (int)(e
->back
.len
* fpw
);
358 case SONG_EV_SS_PITCH_STRETCH
:
360 sse
.ss_pitch_stretch
.note_id
= note_id
++;
361 sse
.ss_pitch_stretch
.note
= e
->ss_pitch_stretch
.note
;
362 sse
.ss_pitch_stretch
.len
= e
->ss_pitch_stretch
.len
;
363 sse
.ss_pitch_stretch
.vol
= e
->ss_pitch_stretch
.vol
;
367 frame
+= (int)(e
->ss_pitch_stretch
.len
* fpw
);
369 sse
.note_off
.type
= SONG_EV_NOTE_OFF
;
370 sse
.note_off
.frame
= frame
;
375 case SONG_EV_SS_PRINT_WAVE_TEMPO
:
377 sse
.ss_print_wave_tempo
.note
= e
->ss_print_wave_tempo
.note
;
378 sse
.ss_print_wave_tempo
.len
= e
->ss_print_wave_tempo
.len
;
385 sse
.ss_wav
.file
= e
->ss_wav
.file
;
386 sse
.ss_wav
.base
= e
->ss_wav
.base
;
387 sse
.ss_wav
.min
= e
->ss_wav
.min
;
388 sse
.ss_wav
.max
= e
->ss_wav
.max
;
389 sse
.ss_wav
.loop_start
= e
->ss_wav
.loop_start
;
390 sse
.ss_wav
.loop_end
= e
->ss_wav
.loop_end
;
391 sse
.ss_wav
.first_channel
= e
->ss_wav
.first_channel
;
392 sse
.ss_wav
.skip_channels
= e
->ss_wav
.skip_channels
;
399 sse
.ss_pat
.file
= e
->ss_pat
.file
;
404 case SONG_EV_SS_SUSTAIN
:
406 sse
.ss_sustain
.sustain
= e
->ss_sustain
.sustain
;
411 case SONG_EV_SS_VIBRATO
:
413 sse
.ss_vibrato
.vib_depth
= e
->ss_vibrato
.vib_depth
;
414 sse
.ss_vibrato
.vib_freq
= e
->ss_vibrato
.vib_freq
;
419 case SONG_EV_SS_PORTAMENTO
:
421 sse
.ss_portamento
.portamento
= e
->ss_portamento
.portamento
;
426 case SONG_EV_SS_CHANNEL
:
428 sse
.ss_channel
.channel
= e
->ss_channel
.channel
;
429 sse
.ss_channel
.vol
= e
->ss_channel
.vol
;
432 if(*n_channels
< e
->ss_channel
.channel
)
433 *n_channels
= e
->ss_channel
.channel
;
438 case SONG_EV_SS_EFF_DELAY
:
439 case SONG_EV_SS_EFF_ECHO
:
440 case SONG_EV_SS_EFF_COMB
:
441 case SONG_EV_SS_EFF_ALLPASS
:
442 case SONG_EV_SS_EFF_FLANGER
:
443 case SONG_EV_SS_EFF_WOBBLE
:
444 case SONG_EV_SS_EFF_SQWOBBLE
:
445 case SONG_EV_SS_EFF_HFWOBBLE
:
446 case SONG_EV_SS_EFF_FADER
:
447 case SONG_EV_SS_EFF_REVERB
:
448 case SONG_EV_SS_EFF_FOLDBACK
:
449 case SONG_EV_SS_EFF_OFF
:
451 sse
.ss_eff
.channel
= e
->ss_eff
.channel
;
452 sse
.ss_eff
.size
= e
->ss_eff
.size
;
453 sse
.ss_eff
.gain
= e
->ss_eff
.gain
;
454 sse
.ss_eff
.depth
= e
->ss_eff
.depth
;
455 sse
.ss_eff
.freq
= e
->ss_eff
.freq
;
456 sse
.ss_eff
.phase
= e
->ss_eff
.phase
;
457 sse
.ss_eff
.initial
= e
->ss_eff
.initial
;
458 sse
.ss_eff
.final
= e
->ss_eff
.final
;
463 case SONG_EV_SONG_INFO
:
465 sse
.song_info
.author
= e
->song_info
.author
;
466 sse
.song_info
.name
= e
->song_info
.name
;
476 case SONG_EV_MIDI_CHANNEL
:
477 case SONG_EV_MIDI_PROGRAM
:
482 case SONG_EV_NOTE_ON
:
483 case SONG_EV_NOTE_OFF
:
486 /* never found in generic song streams */
490 /* store the further frame seen */
491 if(f_frame
< frame
) f_frame
= frame
;
494 /* generates an end of event mark, a time after the last one */
495 sse
.generic
.type
= SONG_EV_END
;
496 sse
.generic
.frame
= f_frame
+ ss_frequency
;
497 sse
.generic
.event_id
= -1;
501 qsort(ss_song
, n_ss_ev
, sizeof(union ss_ev
), ss_ev_cmp
);
508 static void ss_song_trace_events(void)
513 printf("** SOFTWARE SYNTHESIZER EVENT DUMP **\n\n");
514 printf("%10s %5s %5s Event and information\n",
515 "Frame", "Track", "Ev.ID");
516 printf("------------------------------------------------------------\n");
518 for(n
= 0, e
= ss_song
;n
< n_ss_ev
;n
++, e
++)
520 printf("%10d %5d %5d ",
521 e
->generic
.frame
, e
->generic
.trk_id
, e
->generic
.event_id
);
523 switch(e
->generic
.type
)
527 printf("SONG_EV_TEMPO ");
528 printf("%lf", e
->tempo
.tempo
);
531 case SONG_EV_SS_SUSTAIN
:
533 printf("SONG_EV_SS_SUSTAIN ");
534 printf("SUSTAIN:%lf", e
->ss_sustain
.sustain
);
537 case SONG_EV_SS_VIBRATO
:
539 printf("SONG_EV_SS_VIBRATO ");
540 printf("DEPTH:%lf FREQ:%lf",
541 e
->ss_vibrato
.vib_depth
,
542 e
->ss_vibrato
.vib_freq
);
545 case SONG_EV_SS_PORTAMENTO
:
547 printf("SONG_EV_SS_PORTAMENTO ");
549 e
->ss_portamento
.portamento
);
552 case SONG_EV_SS_CHANNEL
:
554 printf("SONG_EV_SS_CHANNEL ");
555 printf("CHANNEL:%d VOL:%lf",
556 e
->ss_channel
.channel
,
562 printf("SONG_EV_SS_WAV ");
563 printf("FILE:'%s' BASE:%d MIN:%d MAX:%d START:%lf END:%lf",
564 e
->ss_wav
.file
, e
->ss_wav
.base
,
565 e
->ss_wav
.min
, e
->ss_wav
.max
,
566 e
->ss_wav
.loop_start
, e
->ss_wav
.loop_end
);
571 printf("SONG_EV_SS_PAT ");
572 printf("FILE:'%s'", e
->ss_pat
.file
);
575 case SONG_EV_SS_EFF_DELAY
:
577 printf("SONG_EV_SS_EFF_DELAY ");
578 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
579 printf("SIZE:%lf ", e
->ss_eff
.size
);
582 case SONG_EV_SS_EFF_ECHO
:
584 printf("SONG_EV_SS_EFF_ECHO ");
585 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
586 printf("SIZE:%lf ", e
->ss_eff
.size
);
587 printf("GAIN:%f ", e
->ss_eff
.gain
);
590 case SONG_EV_SS_EFF_COMB
:
592 printf("SONG_EV_SS_EFF_COMB ");
593 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
594 printf("SIZE:%lf ", e
->ss_eff
.size
);
595 printf("GAIN:%f ", e
->ss_eff
.gain
);
598 case SONG_EV_SS_EFF_ALLPASS
:
600 printf("SONG_EV_SS_EFF_ALLPASS ");
601 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
602 printf("SIZE:%lf ", e
->ss_eff
.size
);
603 printf("GAIN:%f ", e
->ss_eff
.gain
);
606 case SONG_EV_SS_EFF_FLANGER
:
608 printf("SONG_EV_SS_EFF_FLANGER ");
609 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
610 printf("SIZE:%lf ", e
->ss_eff
.size
);
611 printf("GAIN:%f ", e
->ss_eff
.gain
);
612 printf("DEPTH:%lf ", e
->ss_eff
.depth
);
613 printf("FREQ:%lf PHASE:%lf", e
->ss_eff
.freq
,
617 case SONG_EV_SS_EFF_WOBBLE
:
619 printf("SONG_EV_SS_EFF_WOBBLE ");
620 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
621 printf("FREQ:%lf PHASE:%lf GAIN:%lf", e
->ss_eff
.freq
,
622 e
->ss_eff
.phase
, e
->ss_eff
.gain
);
625 case SONG_EV_SS_EFF_SQWOBBLE
:
627 printf("SONG_EV_SS_EFF_SQWOBBLE ");
628 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
629 printf("FREQ:%lf PHASE:%lf", e
->ss_eff
.freq
,
633 case SONG_EV_SS_EFF_HFWOBBLE
:
635 printf("SONG_EV_SS_EFF_HFWOBBLE ");
636 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
637 printf("FREQ:%lf PHASE:%lf", e
->ss_eff
.freq
,
641 case SONG_EV_SS_EFF_FADER
:
643 printf("SONG_EV_SS_EFF_FADER ");
644 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
645 printf("SIZE:%lf ", e
->ss_eff
.size
);
646 printf("INITIAL:%f FINAL:%f", e
->ss_eff
.initial
,
650 case SONG_EV_SS_EFF_REVERB
:
652 printf("SONG_EV_SS_EFF_REVERB ");
653 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
656 case SONG_EV_SS_EFF_OFF
:
658 printf("SONG_EV_SS_EFF_OFF ");
659 printf("CHANNEL:%d ", e
->ss_eff
.channel
);
662 case SONG_EV_SS_PITCH_STRETCH
:
664 printf("SONG_EV_SS_PITCH_STRETCH ");
665 printf("MIDI:%d LEN:%lf VOL:%f",
666 e
->ss_pitch_stretch
.note
,
667 e
->ss_pitch_stretch
.len
,
668 e
->ss_pitch_stretch
.vol
);
672 case SONG_EV_SS_PRINT_WAVE_TEMPO
:
674 printf("SONG_EV_SS_PRINT_WAVE_TEMPO ");
675 printf("MIDI:%d LEN:%lf",
676 e
->ss_print_wave_tempo
.note
,
677 e
->ss_print_wave_tempo
.len
);
680 case SONG_EV_SONG_INFO
:
682 printf("SONG_EV_SONG_INFO ");
683 printf("AUTHOR:'%s' NAME:'%s'",
688 case SONG_EV_NOTE_ON
:
690 printf("SONG_EV_NOTE_ON ");
691 printf("ID:%d MIDI:%d VOL:%f",
692 e
->note_on
.note_id
, e
->note_on
.note
,
696 case SONG_EV_NOTE_OFF
:
698 printf("SONG_EV_NOTE_OFF ");
699 printf("ID:%d", e
->note_off
.note_id
);
704 printf("SONG_EV_EOT ");
709 printf("SONG_EV_END ");
713 printf("** Unexpected type: %d",
724 static union ss_ev
* process_this_frame_events(union ss_ev
* e
, int skip_frames
)
725 /* process the events attached to this frame */
727 static double tempo
= 120.0;
728 static int frame
= 0;
730 /* from the beginning? */
740 if(frame
% ss_frequency
== 0)
742 int m
= frame
/ ss_frequency
;
743 printf("[%02d:%02d]\r", m
/ 60, m
% 60);
748 while(e
!= NULL
&& e
->generic
.frame
== frame
)
754 if(e
->generic
.type
== SONG_EV_NOTE_ON
||
755 e
->generic
.type
== SONG_EV_NOTE_OFF
||
756 e
->generic
.type
== SONG_EV_SS_PITCH_STRETCH
)
758 if(frame
< skip_frames
)
761 frame
= e
->generic
.frame
;
766 /* take the instrument */
767 if(e
->generic
.trk_id
< 0)
770 i
= &ss_song_ins
[e
->generic
.trk_id
];
772 switch(e
->generic
.type
)
774 case SONG_EV_NOTE_ON
:
776 if(ss_ins_note_on(i
, e
->note_on
.note
,
777 e
->note_on
.vol
, e
->note_on
.note_id
) < 0 &&
779 printf("ss_ins_note_on error: track %d note %d\n",
780 e
->note_on
.trk_id
, e
->note_on
.note
);
784 case SONG_EV_NOTE_OFF
:
786 ss_ins_note_off(i
, e
->note_off
.note_id
);
790 case SONG_EV_SS_SUSTAIN
:
792 ss_ins_set_sustain(i
, e
->ss_sustain
.sustain
);
796 case SONG_EV_SS_VIBRATO
:
798 ss_ins_set_vibrato(i
, e
->ss_vibrato
.vib_depth
,
799 e
->ss_vibrato
.vib_freq
);
803 case SONG_EV_SS_PORTAMENTO
:
805 ss_ins_set_portamento(i
,
806 (e
->ss_portamento
.portamento
* 44100.0)
807 / ((double) ss_frequency
* 1000000.0));
811 case SONG_EV_SS_CHANNEL
:
813 ss_ins_set_channel(i
, e
->ss_channel
.channel
,
820 w
= ss_load_wav_file(e
->ss_wav
.file
,
821 ss_note_frequency(e
->ss_wav
.base
),
822 ss_note_frequency(e
->ss_wav
.min
),
823 ss_note_frequency(e
->ss_wav
.max
),
824 e
->ss_wav
.loop_start
, e
->ss_wav
.loop_end
,
825 e
->ss_wav
.first_channel
, e
->ss_wav
.skip_channels
);
827 /* fail if can't open wav */
830 printf("Can't load wav '%s'\n", e
->ss_wav
.file
);
834 ss_ins_add_layer(i
, w
);
840 if(ss_load_pat_file(i
, e
->ss_pat
.file
) < 0)
842 printf("Can't load pat '%s'\n", e
->ss_pat
.file
);
848 case SONG_EV_SS_EFF_DELAY
:
850 ss_eff_delay(&i
->effs
[e
->ss_eff
.channel
], e
->ss_eff
.size
);
853 case SONG_EV_SS_EFF_ECHO
:
855 ss_eff_echo(&i
->effs
[e
->ss_eff
.channel
],
856 e
->ss_eff
.size
, e
->ss_eff
.gain
);
859 case SONG_EV_SS_EFF_COMB
:
861 ss_eff_comb(&i
->effs
[e
->ss_eff
.channel
],
862 e
->ss_eff
.size
, e
->ss_eff
.gain
);
865 case SONG_EV_SS_EFF_ALLPASS
:
867 ss_eff_allpass(&i
->effs
[e
->ss_eff
.channel
],
868 e
->ss_eff
.size
, e
->ss_eff
.gain
);
871 case SONG_EV_SS_EFF_FLANGER
:
873 ss_eff_flanger(&i
->effs
[e
->ss_eff
.channel
],
874 e
->ss_eff
.size
, e
->ss_eff
.gain
,
875 e
->ss_eff
.depth
, e
->ss_eff
.freq
,
879 case SONG_EV_SS_EFF_WOBBLE
:
881 ss_eff_wobble(&i
->effs
[e
->ss_eff
.channel
],
882 e
->ss_eff
.freq
, e
->ss_eff
.phase
,
887 case SONG_EV_SS_EFF_SQWOBBLE
:
889 ss_eff_square_wobble(&i
->effs
[e
->ss_eff
.channel
],
890 e
->ss_eff
.freq
, e
->ss_eff
.phase
);
894 case SONG_EV_SS_EFF_HFWOBBLE
:
896 ss_eff_half_wobble(&i
->effs
[e
->ss_eff
.channel
],
897 e
->ss_eff
.freq
, e
->ss_eff
.phase
);
901 case SONG_EV_SS_EFF_FADER
:
903 ss_eff_fader(&i
->effs
[e
->ss_eff
.channel
],
904 e
->ss_eff
.size
, e
->ss_eff
.initial
,
908 case SONG_EV_SS_EFF_REVERB
:
910 ss_eff_reverb(&i
->effs
[e
->ss_eff
.channel
]);
913 case SONG_EV_SS_EFF_FOLDBACK
:
915 ss_eff_foldback(&i
->effs
[e
->ss_eff
.channel
],
919 case SONG_EV_SS_EFF_OFF
:
921 ss_eff_off(&i
->effs
[e
->ss_eff
.channel
]);
926 /* just store the last tempo */
927 tempo
= e
->tempo
.tempo
;
930 case SONG_EV_SS_PITCH_STRETCH
:
933 freq
= ss_note_frequency(e
->ss_pitch_stretch
.note
);
934 w
= ss_ins_find_layer(i
, freq
, NULL
);
936 /* calculate optimal frequency */
937 freq
= ss_pitch_from_tempo(w
, tempo
,
938 e
->ss_pitch_stretch
.len
);
941 if(ss_ins_play(i
, freq
, e
->ss_pitch_stretch
.vol
,
942 e
->ss_pitch_stretch
.note_id
, w
) < 0 &&
944 printf("ss_ins_play error: track %d freq %f\n",
945 e
->ss_pitch_stretch
.trk_id
, freq
);
949 case SONG_EV_SS_PRINT_WAVE_TEMPO
:
952 freq
= ss_note_frequency(e
->ss_print_wave_tempo
.note
);
953 w
= ss_ins_find_layer(i
, freq
, NULL
);
955 /* print the optimal tempo */
956 printf("Optimal tempo: %lf\n",
957 ss_tempo_from_wave(w
,
958 e
->ss_print_wave_tempo
.note
,
959 e
->ss_print_wave_tempo
.len
));
963 case SONG_EV_SONG_INFO
:
965 /* add a new song (track) */
966 cue_file_song_info(frame
, e
->song_info
.author
,
972 /* end of track; trigger possible cleaning */
982 case SONG_EV_MIDI_CHANNEL
:
983 case SONG_EV_MIDI_PROGRAM
:
986 case SONG_EV_MEASURE
:
988 /* never found in ss song streams */
1002 int ss_song_render(int skip_secs
, char * driver
, char * devfile
)
1005 sample_t output
[SS_MAX_CHANNELS
];
1008 union ss_ev
* e
= NULL
;
1010 /* convert the song to ss events */
1011 ss_song_convert_events(&n_channels
);
1014 printf("Tracks: %d Channels: %d Events: %d\n",
1015 n_song_tracks
, n_channels
, n_ss_ev
);
1019 ss_song_trace_events();
1023 /* set the number of channels, unless forced */
1024 if(ss_nchannels
== -1)
1025 ss_nchannels
= n_channels
> 0 ? n_channels
: 2;
1027 if(ss_output_open(driver
, devfile
) < 0)
1029 printf("Error: can't init driver\n");
1033 /* init the generators */
1036 /* init the instruments */
1037 for(n
= 0;n
< n_song_tracks
;n
++)
1038 ss_ins_init(&ss_song_ins
[n
]);
1040 /* calculate the frame to start playing */
1041 skip_frames
= skip_secs
* ss_frequency
;
1046 /* process all events in this frame */
1047 if((e
= process_this_frame_events(e
, skip_frames
)) == NULL
)
1050 /* reset frame samples */
1051 ss_output_init_frame(output
);
1053 /* generate output from all instruments */
1054 for(n
= 0;n
< n_song_tracks
;n
++)
1055 ss_ins_frame(&ss_song_ins
[n
], output
);
1057 /* dump to sampling driver */
1058 ss_output_write(output
);
1061 if(verbose
>= 1) printf("\n");