/[pidim]/src/pidim_common.h
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Contents of /src/pidim_common.h

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Revision 8 - (show annotations)
Thu Aug 26 19:26:02 2010 UTC (9 years, 5 months ago) by ben
File MIME type: text/plain
File size: 2685 byte(s)
added some common routines for automation
1 /* pidim_common, part of the Pidim project.
2 * Copyright (C) 2010 Benoit Rouits
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #ifndef PIDIM_COMMON
20 #define PIDIM_COMMON
21 #include <alsa/asoundlib.h>
22 #include <stdlib.h>
23
24 /* create a client handle */
25 snd_seq_t* alsa_open_client (const char* name);
26
27 /* create an input port */
28 int alsa_open_input_port(snd_seq_t *handle, const char* name);
29
30 /* create an output port */
31 int alsa_open_output_port(snd_seq_t *handle, const char* name);
32
33 /* initialize an event queue */
34 int alsa_init_queue(snd_seq_t * handle, int seq_len);
35
36 /* clear an event queue */
37 void alsa_clear_queue(snd_seq_t *handle, int queue_id);
38
39 /* get the file descriptor of the first MIDI input port */
40 #if SND_LIB_MAJOR > 0 || SND_LIB_MINOR >= 6
41 /* FIXME: this is a dirty hack form XMBC code */
42 int alsa_get_fd(snd_seq_t *handle);
43 #endif
44
45 /* return a random integer between 0 and 127 */
46 #define random127() (unsigned char)(random()%128)
47
48 /* return a random integer between 0 and 15 */
49 #define random15() (unsigned char)(random()%16)
50
51 #define scale(n, max, base) (((double)((n)*(base)))/(double)(max))
52 #define scale127(n, max) (scale((n),(max),127))
53 #define scale15(n, max) (scale((n),(max),15))
54 #define PI 3.1415926535897932384626434
55 #define scalePI(n, max) (scale((n),(max),PI))
56 #define scale2PI(n, max) (scale((n),(max),(2*PI)))
57
58 /* return an arbitrary lenghted array containing values 0 to max (and < 255) */
59 unsigned char* midi_ramp (int size, unsigned char max);
60
61 #define midi_ramp127(size) (midi_ramp ((size), 127))
62 #define midi_ramp15(size) (midi_ramp ((size), 15))
63
64 /* return a sinewave of arbitrary length containing values < max (and < 255) */
65 unsigned char* midi_sine (int period, unsigned char max);
66
67 #define midi_sine127(period) (midi_sine((period), 127))
68 #define midi_sine15(period) (midi_sine((period, 15))
69
70 /* return a random line of arbitrary length containing values < max (and < 255) */
71 unsigned char* midi_rand (int length, unsigned char max);
72
73 #endif

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