[2425] | 1 | //synth.h: |
---|
| 2 | |
---|
| 3 | /* |
---|
| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
---|
| 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, 675 Mass Ave, Cambridge, MA 02139, USA. |
---|
| 22 | * |
---|
| 23 | * NOTE for everyone want's to change something and send patches: |
---|
| 24 | * read README and HACKING! There a addition information on |
---|
| 25 | * the license of this document you need to read before you send |
---|
| 26 | * any patches. |
---|
| 27 | * |
---|
| 28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
---|
| 29 | * or libpulse*: |
---|
| 30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
---|
| 31 | * and are therefore GPL. Because of this it may be illigal to use |
---|
| 32 | * them with any software that uses libesd, libartsc or libpulse*. |
---|
| 33 | */ |
---|
| 34 | |
---|
| 35 | #ifndef _LIBROARDSP_SYNTH_H_ |
---|
| 36 | #define _LIBROARDSP_SYNTH_H_ |
---|
| 37 | |
---|
| 38 | #include "libroardsp.h" |
---|
| 39 | |
---|
[2426] | 40 | #define ROAR_SYNTH_FUNC_TYPE(name) float (*name)(float t, struct roar_synth_state * state) |
---|
| 41 | #define ROAR_SYNTH_FUNC_CAST(name) ((ROAR_SYNTH_FUNC_TYPE()) name) |
---|
| 42 | |
---|
| 43 | // SYNF -> Synthesis Function |
---|
[2430] | 44 | #define ROAR_SYNTH_SYNF_RECT ROAR_SYNTH_FUNC_CAST(roar_synth_synf_rect) |
---|
| 45 | #define ROAR_SYNTH_SYNF_SAW ROAR_SYNTH_FUNC_CAST(roar_synth_synf_saw) |
---|
| 46 | #define ROAR_SYNTH_SYNF_TRI ROAR_SYNTH_FUNC_CAST(roar_synth_synf_tri) |
---|
| 47 | #define ROAR_SYNTH_SYNF_TRAP ROAR_SYNTH_FUNC_CAST(roar_synth_synf_trap) |
---|
[2482] | 48 | |
---|
| 49 | // those use sin*() |
---|
| 50 | #ifdef ROAR_HAVE_LIBM |
---|
| 51 | #define ROAR_SYNTH_SYNF_SIN ROAR_SYNTH_FUNC_CAST(sinf) |
---|
[2431] | 52 | #define ROAR_SYNTH_SYNF_S2S ROAR_SYNTH_FUNC_CAST(roar_synth_synf_s2s) |
---|
[2482] | 53 | #endif |
---|
[2426] | 54 | |
---|
[2483] | 55 | #ifdef ROAR_HAVE_LIBM |
---|
| 56 | #define ROAR_SYNTH_SYNF_DEFAULT ROAR_SYNTH_SYNF_SIN |
---|
| 57 | #else |
---|
| 58 | #define ROAR_SYNTH_SYNF_DEFAULT ROAR_SYNTH_SYNF_TRAP |
---|
| 59 | #endif |
---|
| 60 | |
---|
[2426] | 61 | struct roar_synth_state { |
---|
| 62 | int rate; |
---|
| 63 | struct roar_note_octave * note; |
---|
| 64 | ROAR_SYNTH_FUNC_TYPE(func); |
---|
| 65 | size_t pcmoffset; |
---|
[2432] | 66 | float volume; |
---|
[2426] | 67 | }; |
---|
| 68 | |
---|
| 69 | int roar_synth_init(struct roar_synth_state * state, struct roar_note_octave * note, int rate); |
---|
| 70 | int roar_synth_set_offset(struct roar_synth_state * state, size_t offset); |
---|
| 71 | int roar_synth_set_func (struct roar_synth_state * state, ROAR_SYNTH_FUNC_TYPE(func)); |
---|
[2432] | 72 | int roar_synth_set_volume(struct roar_synth_state * state, float volume); |
---|
[2426] | 73 | |
---|
| 74 | int roar_synth_pcmout_i16n(struct roar_synth_state * state, int16_t * out, size_t frames, int channels); |
---|
| 75 | int roar_synth_pcmout_i161(struct roar_synth_state * state, int16_t * out, size_t frames); |
---|
| 76 | |
---|
[2430] | 77 | // some basic SYNFs: |
---|
| 78 | float roar_synth_synf_rect (float t, struct roar_synth_state * state); |
---|
| 79 | float roar_synth_synf_saw (float t, struct roar_synth_state * state); |
---|
| 80 | float roar_synth_synf_tri (float t, struct roar_synth_state * state); |
---|
| 81 | float roar_synth_synf_trap (float t, struct roar_synth_state * state); |
---|
[2482] | 82 | |
---|
| 83 | #ifdef ROAR_HAVE_LIBM |
---|
[2431] | 84 | float roar_synth_synf_s2s (float t, struct roar_synth_state * state); |
---|
[2482] | 85 | #endif |
---|
[2430] | 86 | |
---|
[2425] | 87 | #endif |
---|
| 88 | |
---|
| 89 | //ll |
---|