source: roaraudio/include/libroardsp/synth.h @ 6052:d48765b2475e

Last change on this file since 6052:d48765b2475e was 6052:d48765b2475e, checked in by phi, 9 years ago

updated copyright headers

File size: 3.4 KB
Line 
1//synth.h:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2015
5 *
6 *  This file is part of libroar a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  libroar is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 *  NOTE for everyone want's to change something and send patches:
25 *  read README and HACKING! There a addition information on
26 *  the license of this document you need to read before you send
27 *  any patches.
28 *
29 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
30 *  or libpulse*:
31 *  The libs libroaresd, libroararts and libroarpulse link this lib
32 *  and are therefore GPL. Because of this it may be illigal to use
33 *  them with any software that uses libesd, libartsc or libpulse*.
34 */
35
36#ifndef _LIBROARDSP_SYNTH_H_
37#define _LIBROARDSP_SYNTH_H_
38
39#include "libroardsp.h"
40
41#define ROAR_SYNTH_FUNC_TYPE(name)   float (*name)(float t, struct roar_synth_state * state)
42#define ROAR_SYNTH_FUNC_CAST(name) ((float (*    )(float t, struct roar_synth_state * state)) name)
43
44// SYNF -> Synthesis Function
45#define ROAR_SYNTH_SYNF_RECT ROAR_SYNTH_FUNC_CAST(roar_synth_synf_rect)
46#define ROAR_SYNTH_SYNF_SAW  ROAR_SYNTH_FUNC_CAST(roar_synth_synf_saw)
47#define ROAR_SYNTH_SYNF_TRI  ROAR_SYNTH_FUNC_CAST(roar_synth_synf_tri)
48#define ROAR_SYNTH_SYNF_TRAP ROAR_SYNTH_FUNC_CAST(roar_synth_synf_trap)
49
50// those use sin*()
51#ifdef ROAR_HAVE_LIBM
52#define ROAR_SYNTH_SYNF_SIN  ROAR_SYNTH_FUNC_CAST(sinf)
53#define ROAR_SYNTH_SYNF_S2S  ROAR_SYNTH_FUNC_CAST(roar_synth_synf_s2s)
54#endif
55
56#ifdef ROAR_HAVE_LIBM
57#define ROAR_SYNTH_SYNF_DEFAULT ROAR_SYNTH_SYNF_SIN
58#else
59#define ROAR_SYNTH_SYNF_DEFAULT ROAR_SYNTH_SYNF_TRAP
60#endif
61
62struct roar_synth_state {
63 int rate;
64 struct roar_note_octave * note;
65 ROAR_SYNTH_FUNC_TYPE(func);
66 size_t pcmoffset;
67 float volume;
68};
69
70int roar_synth_init(struct roar_synth_state * state, struct roar_note_octave * note, int rate);
71int roar_synth_set_offset(struct roar_synth_state * state, size_t offset);
72int roar_synth_set_func  (struct roar_synth_state * state, ROAR_SYNTH_FUNC_TYPE(func));
73int roar_synth_set_volume(struct roar_synth_state * state, float volume);
74
75int roar_synth_pcmout_i16n(struct roar_synth_state * state, int16_t * out, size_t frames, int channels);
76int roar_synth_pcmout_i161(struct roar_synth_state * state, int16_t * out, size_t frames);
77
78// some basic SYNFs:
79float roar_synth_synf_rect (float t, struct roar_synth_state * state);
80float roar_synth_synf_saw  (float t, struct roar_synth_state * state);
81float roar_synth_synf_tri  (float t, struct roar_synth_state * state);
82float roar_synth_synf_trap (float t, struct roar_synth_state * state);
83
84#ifdef ROAR_HAVE_LIBM
85float roar_synth_synf_s2s  (float t, struct roar_synth_state * state);
86#endif
87
88#endif
89
90//ll
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