source: roaraudio/include/libroardsp/libroardsp.h @ 1100:aac17d20aea1

Last change on this file since 1100:aac17d20aea1 was 1100:aac17d20aea1, checked in by phi, 15 years ago

added DC block with f_e=~5Hz
File size: 6.2 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#define ROARDSP_FILTER_DCBLOCK        9
47
48// filter CTLs:
49
50#define ROARDSP_FCTL_FREQ             1
51#define ROARDSP_FCTL_TIME             2
52#define ROARDSP_FCTL_MUL              3
53#define ROARDSP_FCTL_DIV              4
54#define ROARDSP_FCTL_N                5
55#define ROARDSP_FCTL_LIMIT            6
56#define ROARDSP_FCTL_PHASE            7
57#define ROARDSP_FCTL_Q                8
58#define ROARDSP_FCTL_MODE             9
59
60// filter specific constants:
61#define ROARDSP_DOWNMIX_LEFT          1
62#define ROARDSP_DOWNMIX_RIGHT         2
63#define ROARDSP_DOWNMIX_ARITHMETIC    3
64#define ROARDSP_DOWNMIX_RMS           4
65
66#define ROARDSP_DCBLOCK_NUMBLOCKS     100
67
68// types:
69
70struct roardsp_filter {
71 int    channels;
72 int    bits;
73 int    rate;
74 void * inst;
75 int (*calc  )(struct roardsp_filter * filter, void * data, size_t samples);
76 int (*uninit)(struct roardsp_filter * filter);
77 int (*ctl   )(struct roardsp_filter * filter, int cmd, void * data);
78};
79
80struct roardsp_filterchain {
81 int filters;
82 struct roardsp_filter * filter[ROARDSP_MAX_FILTERS_PER_CHAIN];
83};
84
85struct roardsp_lowp {
86 uint32_t freq; // in mHz (0Hz..4MHz)
87 uint16_t a, b;
88 int32_t  old[ROAR_MAX_CHANNELS];
89};
90
91struct roardsp_highp {
92 uint32_t freq; // in mHz (0Hz..4MHz)
93 int32_t  a, b, c;
94 int32_t  oldout[ROAR_MAX_CHANNELS];
95 int32_t  oldin[ROAR_MAX_CHANNELS];
96};
97
98struct roardsp_amp {
99 int32_t  mul;
100 int32_t  div;
101};
102
103struct roardsp_dcblock {
104 int cur;
105 int32_t dc[ROARDSP_DCBLOCK_NUMBLOCKS];
106};
107
108// funcs:
109int    roardsp_filter_str2id(char * str);
110char * roardsp_filter_id2str(int id);
111int    roardsp_filter_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
112int    roardsp_filter_uninit(struct roardsp_filter * filter);
113int    roardsp_filter_calc  (struct roardsp_filter * filter, void * data, size_t len);
114int    roardsp_filter_ctl   (struct roardsp_filter * filter, int cmd, void * data);
115
116int roardsp_fchain_init  (struct roardsp_filterchain * chain);
117int roardsp_fchain_uninit(struct roardsp_filterchain * chain);
118int roardsp_fchain_add   (struct roardsp_filterchain * chain, struct roardsp_filter * filter);
119int roardsp_fchain_calc  (struct roardsp_filterchain * chain, void * data, size_t len);
120int roardsp_fchain_num   (struct roardsp_filterchain * chain);
121
122// filter:
123
124int roardsp_lowp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
125int roardsp_lowp_uninit(struct roardsp_filter * filter);
126int roardsp_lowp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
127int roardsp_lowp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
128
129int roardsp_highp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
130int roardsp_highp_uninit(struct roardsp_filter * filter);
131int roardsp_highp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
132int roardsp_highp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
133
134int roardsp_amp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
135int roardsp_amp_uninit(struct roardsp_filter * filter);
136int roardsp_amp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
137int roardsp_amp_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
138int roardsp_amp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
139
140int roardsp_add_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
141int roardsp_add_calc16(struct roardsp_filter * filter, void * data, size_t samples);
142
143int roardsp_quantify_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
144int roardsp_quantify_uninit(struct roardsp_filter * filter);
145int roardsp_quantify_calc16(struct roardsp_filter * filter, void * data, size_t samples);
146int roardsp_quantify_ctl   (struct roardsp_filter * filter, int cmd, void * data);
147
148int roardsp_clip_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
149int roardsp_clip_calc16(struct roardsp_filter * filter, void * data, size_t samples);
150int roardsp_clip_ctl   (struct roardsp_filter * filter, int cmd, void * data);
151
152int roardsp_downmix_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
153int roardsp_downmix_calc162(struct roardsp_filter * filter, void * data, size_t samples);
154int roardsp_downmix_ctl    (struct roardsp_filter * filter, int cmd, void * data);
155
156int roardsp_dcblock_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
157int roardsp_dcblock_uninit (struct roardsp_filter * filter);
158int roardsp_dcblock_calc16 (struct roardsp_filter * filter, void * data, size_t samples);
159
160// codecs:
161int roardsp_conv_alaw2pcm16 (int16_t * out, char * in, size_t len);
162int roardsp_conv_pcm162alaw (char * out, int16_t * in, size_t len);
163
164int roardsp_conv_mulaw2pcm16 (int16_t * out, char * in, size_t len);
165int roardsp_conv_pcm162mulaw (char * out, int16_t * in, size_t len);
166
167__END_DECLS
168
169#endif
170
171//ll
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