3 Ann Hell Ex Machina - Music Software
4 Copyright (C) 2003/2005 Angel Ortega <angel@triptico.com>
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License
8 as published by the Free Software Foundation; either version 2
9 of the License, or (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 http://www.triptico.com
26 #ifndef SS_MAX_CHANNELS
27 #define SS_MAX_CHANNELS 16
30 #ifndef SS_MAX_GENERATORS
31 #define SS_MAX_GENERATORS 256
40 double size
; /* size in frames */
41 int n_channels
; /* # of channels */
42 float ** wave
; /* the PCM waves */
43 int s_rate
; /* original sample rate */
45 double loop_start
; /* start of loop (-1, no loop) */
46 double loop_end
; /* end of loop */
48 double base_freq
; /* base frequency */
49 double min_freq
; /* minimum frequency */
50 double max_freq
; /* maximum frequency */
57 int note_id
; /* note ID */
58 float vol
; /* volume */
59 struct ss_wave
* w
; /* the wave data */
61 double cursor
; /* offset to next sample */
62 double inc
; /* increment (frequency) */
64 int sustain
; /* number of frames to play after release */
65 float dvol
; /* volume decrement in sustain */
67 double vibrato
; /* vibrato oscillator */
68 double vib_depth
; /* vibrato depth */
69 double vib_inc
; /* increment for vibrato oscillator */
71 double portamento
; /* portamento sum to inc */
77 /* software syntesizer instruments */
81 int n_layers
; /* # of layers */
82 struct ss_wave
** layers
; /* layers */
84 struct ss_gen
* gens
; /* generator queue */
86 int n_channels
; /* number of channels */
87 float * vols
; /* volumes (1 per channel) */
88 struct ss_eff
** effs
; /* effect chains (1 per channel) */
90 double sustain
; /* sustain in msecs */
97 float * wave
; /* wave buffer */
98 double size
; /* size of wave */
99 float gain
; /* effect gain */
100 float igain
; /* gain increment */
102 double lfo
; /* lfo value */
103 double lfo_depth
; /* lfo depth */
104 double lfo_inc
; /* lfo increment */
106 double cursor
; /* current buffer position */
108 float (* func
)(struct ss_eff
*, float); /* processing function */
110 struct ss_eff
* next
; /* next in chain */
127 SONG_EV_SS_EFF_DELAY
,
130 SONG_EV_SS_EFF_ALLPASS
,
131 SONG_EV_SS_EFF_FLANGER
,
132 SONG_EV_SS_EFF_WOBBLE
,
133 SONG_EV_SS_EFF_SQWOBBLE
,
134 SONG_EV_SS_EFF_FADER
,
135 SONG_EV_SS_EFF_REVERB
,
138 SONG_EV_MIDI_CHANNEL
,
139 SONG_EV_MIDI_PROGRAM
,
142 SONG_EV_SS_PITCH_STRETCH
,
151 struct song_ev_generic
153 song_ev_type type
; /* event type */
154 double time
; /* event time (1: whole note) */
155 int trk_id
; /* track id */
160 song_ev_type type
; /* SONG_EV_NOTE */
163 int note
; /* MIDI-like note */
164 double len
; /* note length (1: whole note) */
165 float vol
; /* note volume (1: full volume) */
170 song_ev_type type
; /* SONG_EV_TEMPO */
172 int trk_id
; /* always -1 */
173 double tempo
; /* tempo in bpm */
178 song_ev_type type
; /* SONG_EV_METER */
180 int trk_id
; /* always -1 */
181 int num
; /* meter numerator */
182 int den
; /* meter denominator */
185 struct song_ev_ss_pitch_stretch
187 song_ev_type type
; /* SONG_EV_SS_PITCH_STRETCH */
190 int note
; /* MIDI-like note (to find the wave) */
191 double len
; /* note length (1: whole note) */
192 float vol
; /* note volume (1: full volume) */
195 struct song_ev_ss_sustain
197 song_ev_type type
; /* SONG_EV_SS_SUSTAIN */
200 double sustain
; /* sustain time (in msecs) */
203 struct song_ev_ss_channel
205 song_ev_type type
; /* SONG_EV_SS_CHANNEL */
208 int channel
; /* channel */
209 float vol
; /* volume */
212 struct song_ev_ss_wav
214 song_ev_type type
; /* SONG_EV_SS_WAV */
217 char * file
; /* path to .wav file */
218 int base
; /* MIDI-like base note */
219 int min
; /* MIDI-like minimum note */
220 int max
; /* MIDI-like maximum note */
221 double loop_start
; /* start of loop */
222 double loop_end
; /* end of loop */
225 struct song_ev_ss_pat
227 song_ev_type type
; /* SONG_EV_SS_PAT */
230 char * file
; /* path to .pat file */
233 struct song_ev_ss_eff
235 song_ev_type type
; /* effect type */
238 int channel
; /* channel */
239 double size
; /* size of effect */
240 float gain
; /* gain */
241 double depth
; /* depth */
242 double freq
; /* freq */
243 double phase
; /* phase */
244 float initial
; /* initial vol */
245 float final
; /* final vol */
248 struct song_ev_midi_channel
250 song_ev_type type
; /* SONG_EV_MIDI_CHANNEL */
253 int channel
; /* midi channel (1-16) */
256 struct song_ev_midi_program
258 song_ev_type type
; /* SONG_EV_MIDI_PROGRAM */
261 int program
; /* midi program (0-127) */
266 struct song_ev_generic generic
;
268 struct song_ev_tempo tempo
;
269 struct song_ev_meter meter
;
271 struct song_ev_note note
;
273 struct song_ev_ss_pitch_stretch ss_pitch_stretch
;
274 struct song_ev_ss_sustain ss_sustain
;
275 struct song_ev_ss_channel ss_channel
;
277 struct song_ev_ss_wav ss_wav
;
278 struct song_ev_ss_pat ss_pat
;
280 struct song_ev_ss_eff ss_eff
;
282 struct song_ev_midi_channel midi_channel
;
283 struct song_ev_midi_program midi_program
;
291 extern int ss_frequency
;
292 extern int ss_interpolation
;
293 extern int ss_nchannels
;
298 extern float ss_master_volume
;
299 extern int ss_output_frames
;
300 extern int ss_output_clipped
;
301 extern float ss_optimal_volume
;
305 extern union song_ev
* song
;
306 extern int n_song_ev
;
311 /* milliseconds to frames conversion */
312 #define MS2F(ms) ((ms / 1000.0) * ss_frequency)
319 double ss_note_frequency(int note
);
320 struct ss_wave
* ss_alloc_wave(int size
, int n_channels
, int s_rate
);
321 float ss_get_sample(float * wave
, double size
, double offset
);
322 double ss_tempo_from_wave(struct ss_wave
* w
, int note
, double len
);
323 double ss_pitch_from_tempo(struct ss_wave
* w
, double tempo
, double len
);
327 struct ss_gen
* ss_gen_alloc(struct ss_gen
** q
);
328 void ss_gen_free(struct ss_gen
** q
, struct ss_gen
* g
);
329 void ss_gen_sustain(struct ss_gen
* g
, double sustain
);
330 void ss_gen_vibrato(struct ss_gen
* g
, double depth
, double freq
);
331 void ss_gen_play(struct ss_gen
* g
, double freq
, float vol
, int note_id
,
333 void ss_gen_release(struct ss_gen
* g
);
334 int ss_gen_frame(struct ss_gen
* g
, int n_channels
, float frame
[]);
338 void ss_ins_init(struct ss_ins
* i
);
339 void ss_ins_add_layer(struct ss_ins
* i
, struct ss_wave
* w
);
340 struct ss_wave
* ss_ins_find_layer(struct ss_ins
* i
, double freq
, int * off
);
341 void ss_ins_set_channel(struct ss_ins
* i
, int channel
, float vol
);
342 void ss_ins_set_sustain(struct ss_ins
* i
, double sustain
);
343 int ss_ins_play(struct ss_ins
* i
, double freq
, float vol
, int note_id
,
345 int ss_ins_note_on(struct ss_ins
* i
, int note
, float vol
, int note_id
);
346 void ss_ins_note_off(struct ss_ins
* i
, int note_id
);
347 void ss_ins_frame(struct ss_ins
* i
, float frame
[]);
351 int ss_output_open(char * drvname
, char * filename
);
352 void ss_output_init_frame(float samples
[]);
353 int ss_output_write(float samples
[]);
354 int ss_output_close(void);
358 struct ss_wave
* ss_load_wav_file(char * file
,
359 double base_freq
, double min_freq
, double max_freq
,
360 double loop_start
, double loop_end
);
361 int ss_load_pat_file(struct ss_ins
* i
, char * file
);
365 void ss_eff_delay(struct ss_eff
** ec
, double size
);
366 void ss_eff_echo(struct ss_eff
** ec
, double size
, float gain
);
367 void ss_eff_comb(struct ss_eff
** ec
, double size
, float gain
);
368 void ss_eff_allpass(struct ss_eff
** ec
, double size
, float gain
);
369 void ss_eff_flanger(struct ss_eff
** ec
, double size
, float gain
,
370 double depth
, double freq
, double phase
);
371 void ss_eff_wobble(struct ss_eff
** ec
, double freq
, double phase
);
372 void ss_eff_square_wobble(struct ss_eff
** ec
, double freq
, double phase
);
373 void ss_eff_fader(struct ss_eff
** ec
, double size
, float initial
, float final
);
374 void ss_eff_reverb(struct ss_eff
** ec
);
376 float ss_eff_process(struct ss_eff
* e
, float s
);
377 void ss_eff_off(struct ss_eff
** ec
);
381 void song_clear(void);
382 void add_song_ev(union song_ev
* ev
);
383 void song_sort(void);
387 int ss_song_render(void);
391 int midi_song_play(void);