source: roaraudio/include/libroardsp/libroardsp.h @ 1004:15b43935d30b

Last change on this file since 1004:15b43935d30b was 1004:15b43935d30b, checked in by phi, 15 years ago

added new filter: downmix
File size: 5.8 KB
Line 
1//libroardsp.h:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - August 2008
5 *
6 *  This file is part of libroardsp 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 *  libroardsp 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 */
24
25#ifndef _LIBROARDSP_H_
26#define _LIBROARDSP_H_
27
28#include <roaraudio.h>
29
30__BEGIN_DECLS
31
32#include "midi.h"
33
34// defines
35#define ROARDSP_MAX_FILTERS_PER_CHAIN 8
36
37#define ROARDSP_FILTER_NONE           0
38#define ROARDSP_FILTER_AMP            1
39#define ROARDSP_FILTER_LOWP           2
40#define ROARDSP_FILTER_HIGHP          3
41#define ROARDSP_FILTER_MODULATE       4
42#define ROARDSP_FILTER_QUANTIFY       5
43#define ROARDSP_FILTER_CLIP           6
44#define ROARDSP_FILTER_ADD            7
45#define ROARDSP_FILTER_DOWNMIX        8
46
47// filter CTLs:
48
49#define ROARDSP_FCTL_FREQ             1
50#define ROARDSP_FCTL_TIME             2
51#define ROARDSP_FCTL_MUL              3
52#define ROARDSP_FCTL_DIV              4
53#define ROARDSP_FCTL_N                5
54#define ROARDSP_FCTL_LIMIT            6
55#define ROARDSP_FCTL_PHASE            7
56#define ROARDSP_FCTL_Q                8
57#define ROARDSP_FCTL_MODE             9
58
59// filter specific constants:
60#define ROARDSP_DOWNMIX_LEFT          1
61#define ROARDSP_DOWNMIX_RIGHT         2
62#define ROARDSP_DOWNMIX_ARITHMETIC    3
63#define ROARDSP_DOWNMIX_RMS           4
64
65// types:
66
67struct roardsp_filter {
68 int    channels;
69 int    bits;
70 int    rate;
71 void * inst;
72 int (*calc  )(struct roardsp_filter * filter, void * data, size_t samples);
73 int (*uninit)(struct roardsp_filter * filter);
74 int (*ctl   )(struct roardsp_filter * filter, int cmd, void * data);
75};
76
77struct roardsp_filterchain {
78 int filters;
79 struct roardsp_filter * filter[ROARDSP_MAX_FILTERS_PER_CHAIN];
80};
81
82struct roardsp_lowp {
83 uint32_t freq; // in mHz (0Hz..4MHz)
84 uint16_t a, b;
85 int32_t  old[ROAR_MAX_CHANNELS];
86};
87
88struct roardsp_highp {
89 uint32_t freq; // in mHz (0Hz..4MHz)
90 int32_t  a, b, c;
91 int32_t  oldout[ROAR_MAX_CHANNELS];
92 int32_t  oldin[ROAR_MAX_CHANNELS];
93};
94
95struct roardsp_amp {
96 int32_t  mul;
97 int32_t  div;
98};
99
100// funcs:
101int    roardsp_filter_str2id(char * str);
102char * roardsp_filter_id2str(int id);
103int    roardsp_filter_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
104int    roardsp_filter_uninit(struct roardsp_filter * filter);
105int    roardsp_filter_calc  (struct roardsp_filter * filter, void * data, size_t len);
106int    roardsp_filter_ctl   (struct roardsp_filter * filter, int cmd, void * data);
107
108int roardsp_fchain_init  (struct roardsp_filterchain * chain);
109int roardsp_fchain_uninit(struct roardsp_filterchain * chain);
110int roardsp_fchain_add   (struct roardsp_filterchain * chain, struct roardsp_filter * filter);
111int roardsp_fchain_calc  (struct roardsp_filterchain * chain, void * data, size_t len);
112int roardsp_fchain_num   (struct roardsp_filterchain * chain);
113
114// filter:
115
116int roardsp_lowp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
117int roardsp_lowp_uninit(struct roardsp_filter * filter);
118int roardsp_lowp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
119int roardsp_lowp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
120
121int roardsp_highp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
122int roardsp_highp_uninit(struct roardsp_filter * filter);
123int roardsp_highp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
124int roardsp_highp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
125
126int roardsp_amp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
127int roardsp_amp_uninit(struct roardsp_filter * filter);
128int roardsp_amp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
129int roardsp_amp_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
130int roardsp_amp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
131
132int roardsp_add_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
133int roardsp_add_calc16(struct roardsp_filter * filter, void * data, size_t samples);
134
135int roardsp_quantify_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
136int roardsp_quantify_uninit(struct roardsp_filter * filter);
137int roardsp_quantify_calc16(struct roardsp_filter * filter, void * data, size_t samples);
138int roardsp_quantify_ctl   (struct roardsp_filter * filter, int cmd, void * data);
139
140int roardsp_clip_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
141int roardsp_clip_calc16(struct roardsp_filter * filter, void * data, size_t samples);
142int roardsp_clip_ctl   (struct roardsp_filter * filter, int cmd, void * data);
143
144int roardsp_downmix_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
145int roardsp_downmix_calc162(struct roardsp_filter * filter, void * data, size_t samples);
146int roardsp_downmix_ctl    (struct roardsp_filter * filter, int cmd, void * data);
147
148// codecs:
149int roardsp_conv_alaw2pcm16 (int16_t * out, char * in, size_t len);
150int roardsp_conv_pcm162alaw (char * out, int16_t * in, size_t len);
151
152int roardsp_conv_mulaw2pcm16 (int16_t * out, char * in, size_t len);
153int roardsp_conv_pcm162mulaw (char * out, int16_t * in, size_t len);
154
155__END_DECLS
156
157#endif
158
159//ll
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