source: roaraudio/include/libroardsp/filters.h @ 5173:96a378947ca8

Last change on this file since 5173:96a378947ca8 was 5173:96a378947ca8, checked in by phi, 13 years ago

imporved the clip filter
File size: 6.4 KB
Line 
1//filters.h:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011
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_FILTERS_H_
37#define _LIBROARDSP_FILTERS_H_
38
39#include "libroardsp.h"
40
41#ifdef ROAR_HAVE_LIBM
42struct roardsp_lowp {
43 uint32_t freq; // in mHz (0Hz..4MHz)
44 uint16_t a, b;
45 int32_t  old[ROAR_MAX_CHANNELS];
46};
47
48struct roardsp_highp {
49 uint32_t freq; // in mHz (0Hz..4MHz)
50 int32_t  a, b, c;
51 int32_t  oldout[ROAR_MAX_CHANNELS];
52 int32_t  oldin[ROAR_MAX_CHANNELS];
53};
54#endif
55
56struct roardsp_amp {
57 int32_t  mul;
58 int32_t  div;
59};
60
61struct roardsp_dcblock {
62 int cur;
63 int32_t dc[ROARDSP_DCBLOCK_NUMBLOCKS];
64};
65
66enum roardsp_clip_mode {
67 ROARDSP_CLIP_MODE_LIMIT = 0,
68 ROARDSP_CLIP_MODE_ZERO  = 1,
69 ROARDSP_CLIP_MODE_WARP  = 2,
70 ROARDSP_CLIP_MODE_NOISE  = 3,
71};
72
73struct roardsp_clip {
74 enum roardsp_clip_mode mode;
75 int32_t limit;
76};
77
78struct roardsp_swap {
79 int map[ROAR_MAX_CHANNELS];
80};
81
82struct roardsp_agc {
83 struct roardsp_filter * amp;
84 uint32_t target_amp;
85};
86
87struct roardsp_speex_prep {
88#ifdef _SPEEX_TYPES_H
89 SpeexPreprocessState *preprocess;
90 int frame_size;
91#else
92 char dummy[8];
93#endif
94};
95
96
97// filter:
98
99#ifdef ROAR_HAVE_LIBM
100int roardsp_lowp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
101int roardsp_lowp_uninit(struct roardsp_filter * filter);
102int roardsp_lowp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
103int roardsp_lowp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
104int roardsp_lowp_reset (struct roardsp_filter * filter, int what);
105
106int roardsp_highp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
107int roardsp_highp_uninit(struct roardsp_filter * filter);
108int roardsp_highp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
109int roardsp_highp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
110int roardsp_highp_reset (struct roardsp_filter * filter, int what);
111#endif
112
113int roardsp_amp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
114int roardsp_amp_uninit(struct roardsp_filter * filter);
115int roardsp_amp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
116int roardsp_amp_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
117int roardsp_amp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
118int roardsp_amp_reset (struct roardsp_filter * filter, int what);
119
120int roardsp_add_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
121int roardsp_add_calc16(struct roardsp_filter * filter, void * data, size_t samples);
122int roardsp_add_reset (struct roardsp_filter * filter, int what);
123
124int roardsp_quantify_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
125int roardsp_quantify_uninit(struct roardsp_filter * filter);
126int roardsp_quantify_calc16(struct roardsp_filter * filter, void * data, size_t samples);
127int roardsp_quantify_ctl   (struct roardsp_filter * filter, int cmd, void * data);
128int roardsp_quantify_reset (struct roardsp_filter * filter, int what);
129
130int roardsp_clip_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
131int roardsp_clip_uninit(struct roardsp_filter * filter);
132int roardsp_clip_calc16(struct roardsp_filter * filter, void * data, size_t samples);
133int roardsp_clip_ctl   (struct roardsp_filter * filter, int cmd, void * data);
134int roardsp_clip_reset (struct roardsp_filter * filter, int what);
135
136int roardsp_downmix_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
137int roardsp_downmix_calc162(struct roardsp_filter * filter, void * data, size_t samples);
138int roardsp_downmix_ctl    (struct roardsp_filter * filter, int cmd, void * data);
139int roardsp_downmix_reset  (struct roardsp_filter * filter, int what);
140
141int roardsp_dcblock_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
142int roardsp_dcblock_uninit (struct roardsp_filter * filter);
143int roardsp_dcblock_calc16 (struct roardsp_filter * filter, void * data, size_t samples);
144int roardsp_dcblock_reset  (struct roardsp_filter * filter, int what);
145
146int roardsp_swap_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
147int roardsp_swap_uninit (struct roardsp_filter * filter);
148int roardsp_swap_calc162(struct roardsp_filter * filter, void * data, size_t samples);
149int roardsp_swap_ctl    (struct roardsp_filter * filter, int cmd, void * data);
150int roardsp_swap_reset  (struct roardsp_filter * filter, int what);
151
152int roardsp_agc_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
153int roardsp_agc_uninit (struct roardsp_filter * filter);
154int roardsp_agc_ctl    (struct roardsp_filter * filter, int cmd, void * data);
155int roardsp_agc_reset  (struct roardsp_filter * filter, int what);
156
157#ifdef _SPEEX_TYPES_H
158#define ROAR_HAVE_SPEEX_FILTER
159int roardsp_speex_prep_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
160int roardsp_speex_prep_uninit (struct roardsp_filter * filter);
161int roardsp_speex_prep_calc161(struct roardsp_filter * filter, void * data, size_t samples);
162int roardsp_speex_prep_ctl    (struct roardsp_filter * filter, int cmd, void * data);
163int roardsp_speex_prep_reset  (struct roardsp_filter * filter, int what);
164#endif
165
166
167#endif
168
169//ll
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