source: roaraudio/include/libroardsp/filters.h @ 5548:73e43db30a1c

Last change on this file since 5548:73e43db30a1c was 5548:73e43db30a1c, checked in by phi, 7 years ago

Added filter based on Goertzel algorithm

File size: 9.4 KB
Line 
1//filters.h:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2011-2012
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
96enum roardsp_responsecurve_mode {
97 ROARDSP_RESPONSECURVE_MODE_PASS = 0, /* pass:           o = i                   */
98 ROARDSP_RESPONSECURVE_MODE_LIN  = 1, /* linear:         o = -(1-i)^(N+1) + 1    */
99 ROARDSP_RESPONSECURVE_MODE_ILIN = 2, /* inverse linear: o = i**(N+1)            */
100 ROARDSP_RESPONSECURVE_MODE_SIN  = 3, /* sin:            o = sin(pi/2 * i)^N     */
101 ROARDSP_RESPONSECURVE_MODE_ISIN = 4, /* inverse sin:    o = 1-sin((1-i)*pi/2)^N */
102 ROARDSP_RESPONSECURVE_MODE_COS  = 5, /* cos:            o = 0.5-cos(i*pi)/2     */
103 ROARDSP_RESPONSECURVE_MODE_ICOS = 6, /* inverse cos:    o = 2*i-0.5+cos(i*pi)/2 */
104};
105
106struct roardsp_responsecurve {
107 enum roardsp_responsecurve_mode mode_pos, mode_neg;
108 int32_t N;
109};
110
111// filter:
112
113#ifdef ROAR_HAVE_LIBM
114int roardsp_lowp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
115int roardsp_lowp_uninit(struct roardsp_filter * filter);
116int roardsp_lowp_calc32(struct roardsp_filter * filter, void * data, size_t samples);
117int roardsp_lowp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
118int roardsp_lowp_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
119int roardsp_lowp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
120int roardsp_lowp_reset (struct roardsp_filter * filter, int what);
121
122int roardsp_highp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
123int roardsp_highp_uninit(struct roardsp_filter * filter);
124int roardsp_highp_calc32(struct roardsp_filter * filter, void * data, size_t samples);
125int roardsp_highp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
126int roardsp_highp_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
127int roardsp_highp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
128int roardsp_highp_reset (struct roardsp_filter * filter, int what);
129#endif
130
131int roardsp_amp_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
132int roardsp_amp_uninit(struct roardsp_filter * filter);
133int roardsp_amp_calc32(struct roardsp_filter * filter, void * data, size_t samples);
134int roardsp_amp_calc16(struct roardsp_filter * filter, void * data, size_t samples);
135int roardsp_amp_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
136int roardsp_amp_ctl   (struct roardsp_filter * filter, int cmd, void * data);
137int roardsp_amp_reset (struct roardsp_filter * filter, int what);
138
139int roardsp_add_calc32(struct roardsp_filter * filter, void * data, size_t samples);
140int roardsp_add_calc16(struct roardsp_filter * filter, void * data, size_t samples);
141int roardsp_add_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
142int roardsp_add_reset (struct roardsp_filter * filter, int what);
143
144int roardsp_quantify_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
145int roardsp_quantify_uninit(struct roardsp_filter * filter);
146int roardsp_quantify_calc32(struct roardsp_filter * filter, void * data, size_t samples);
147int roardsp_quantify_calc16(struct roardsp_filter * filter, void * data, size_t samples);
148int roardsp_quantify_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
149int roardsp_quantify_ctl   (struct roardsp_filter * filter, int cmd, void * data);
150int roardsp_quantify_reset (struct roardsp_filter * filter, int what);
151
152int roardsp_clip_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
153int roardsp_clip_uninit(struct roardsp_filter * filter);
154int roardsp_clip_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
155int roardsp_clip_calc16(struct roardsp_filter * filter, void * data, size_t samples);
156int roardsp_clip_calc32(struct roardsp_filter * filter, void * data, size_t samples);
157int roardsp_clip_ctl   (struct roardsp_filter * filter, int cmd, void * data);
158int roardsp_clip_reset (struct roardsp_filter * filter, int what);
159
160int roardsp_downmix_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
161int roardsp_downmix_calc162(struct roardsp_filter * filter, void * data, size_t samples);
162int roardsp_downmix_ctl    (struct roardsp_filter * filter, int cmd, void * data);
163int roardsp_downmix_reset  (struct roardsp_filter * filter, int what);
164
165int roardsp_dcblock_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
166int roardsp_dcblock_uninit (struct roardsp_filter * filter);
167int roardsp_dcblock_calc16 (struct roardsp_filter * filter, void * data, size_t samples);
168int roardsp_dcblock_reset  (struct roardsp_filter * filter, int what);
169
170int roardsp_swap_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
171int roardsp_swap_uninit (struct roardsp_filter * filter);
172int roardsp_swap_calc322(struct roardsp_filter * filter, void * data, size_t samples);
173int roardsp_swap_calc162(struct roardsp_filter * filter, void * data, size_t samples);
174int roardsp_swap_calc82 (struct roardsp_filter * filter, void * data, size_t samples);
175int roardsp_swap_ctl    (struct roardsp_filter * filter, int cmd, void * data);
176int roardsp_swap_reset  (struct roardsp_filter * filter, int what);
177
178int roardsp_agc_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
179int roardsp_agc_uninit (struct roardsp_filter * filter);
180int roardsp_agc_ctl    (struct roardsp_filter * filter, int cmd, void * data);
181int roardsp_agc_reset  (struct roardsp_filter * filter, int what);
182
183#ifdef _SPEEX_TYPES_H
184#define ROAR_HAVE_SPEEX_FILTER
185int roardsp_speex_prep_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id);
186int roardsp_speex_prep_uninit (struct roardsp_filter * filter);
187int roardsp_speex_prep_calc161(struct roardsp_filter * filter, void * data, size_t samples);
188int roardsp_speex_prep_ctl    (struct roardsp_filter * filter, int cmd, void * data);
189int roardsp_speex_prep_reset  (struct roardsp_filter * filter, int what);
190#endif
191
192#ifdef ROAR_HAVE_LIBM
193int roardsp_responsecurve_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
194int roardsp_responsecurve_uninit(struct roardsp_filter * filter);
195int roardsp_responsecurve_calc32(struct roardsp_filter * filter, void * data, size_t samples);
196int roardsp_responsecurve_calc16(struct roardsp_filter * filter, void * data, size_t samples);
197int roardsp_responsecurve_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
198int roardsp_responsecurve_ctl   (struct roardsp_filter * filter, int cmd, void * data);
199int roardsp_responsecurve_reset (struct roardsp_filter * filter, int what);
200
201int roardsp_goertzel_init  (struct roardsp_filter * filter, struct roar_stream * stream, int id);
202int roardsp_goertzel_uninit(struct roardsp_filter * filter);
203int roardsp_goertzel_calc32(struct roardsp_filter * filter, void * data, size_t samples);
204int roardsp_goertzel_calc16(struct roardsp_filter * filter, void * data, size_t samples);
205int roardsp_goertzel_calc8 (struct roardsp_filter * filter, void * data, size_t samples);
206int roardsp_goertzel_ctl   (struct roardsp_filter * filter, int cmd, void * data);
207int roardsp_goertzel_reset (struct roardsp_filter * filter, int what);
208#endif
209
210#endif
211
212//ll
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