source: roaraudio/libroardsp/filter_swap.c @ 5381:430b1d26e12d

Last change on this file since 5381:430b1d26e12d was 5381:430b1d26e12d, checked in by phi, 12 years ago

updated copyright years

File size: 2.7 KB
Line 
1//filter_swap.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2012
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, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 */
25
26#include "libroardsp.h"
27
28int roardsp_swap_init   (struct roardsp_filter * filter, struct roar_stream * stream, int id) {
29 struct roardsp_swap * inst = roar_mm_malloc(sizeof(struct roardsp_swap));
30
31 (void)stream, (void)id;
32
33 ROAR_DBG("roardsp_swap_init(*): inst=%p", inst);
34
35 if ( inst == NULL ) {
36  ROAR_ERR("roardsp_swap_init(*): Can not alloc memory for filter swap: %s", strerror(errno));
37  filter->inst = NULL;
38  return -1;
39 }
40
41 filter->inst = inst;
42
43 return roardsp_swap_reset(filter, ROARDSP_RESET_FULL);
44}
45
46int roardsp_swap_uninit (struct roardsp_filter * filter) {
47 if ( filter == NULL )
48  return -1;
49
50 if ( filter->inst == NULL )
51  return -1;
52
53 roar_mm_free(filter->inst);
54
55 return 0;
56}
57
58#define _calcX2(bits) \
59int roardsp_swap_calc##bits##2(struct roardsp_filter * filter, void * data, size_t samples) { \
60 int##bits##_t * d = data; \
61 register int##bits##_t s; \
62 size_t i; \
63\
64 (void)filter; \
65\
66 for (i = 0; i < samples; i += 2) { \
67  ROAR_DBG("roardsp_swap_calc*2(*): d[i]=%i, d[i+1]=%i", d[i], d[i+1]); \
68  s      = d[i]; \
69  d[i]   = d[i+1]; \
70  d[i+1] = s; \
71 } \
72\
73 return 0; \
74}
75
76_calcX2(8)
77_calcX2(16)
78_calcX2(32)
79
80int roardsp_swap_ctl    (struct roardsp_filter * filter, int cmd, void * data) {
81 (void)filter, (void)cmd, (void)data;
82 roar_err_set(ROAR_ERROR_NOSYS);
83 return -1;
84}
85
86int roardsp_swap_reset  (struct roardsp_filter * filter, int what) {
87 struct roardsp_swap * inst = NULL;
88 int i;
89
90 if ( filter == NULL )
91  return -1;
92
93 if ( (inst = filter->inst) == NULL )
94  return -1;
95
96 switch (what) {
97  case ROARDSP_RESET_NONE:
98  case ROARDSP_RESET_STATE:
99    return  0;
100   break;
101  case ROARDSP_RESET_FULL:
102    memset(inst, 0, sizeof(struct roardsp_swap));
103
104    for (i = 0; i < ROAR_MAX_CHANNELS; i++)
105     inst->map[i] = i;
106
107    inst->map[0] = 1;
108    inst->map[1] = 0;
109    return  0;
110   break;
111  default:
112    return -1;
113 }
114
115 return -1;
116}
117
118//ll
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