1 | //swap.c: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2010 |
---|
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 | |
---|
28 | int 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 | ROAR_DBG("roardsp_swap_init(*): inst=%p", inst); |
---|
32 | |
---|
33 | if ( inst == NULL ) { |
---|
34 | ROAR_ERR("roardsp_swap_init(*): Can not alloc memory for filter swap: %s", strerror(errno)); |
---|
35 | filter->inst = NULL; |
---|
36 | return -1; |
---|
37 | } |
---|
38 | |
---|
39 | filter->inst = inst; |
---|
40 | |
---|
41 | return roardsp_swap_reset(filter, ROARDSP_RESET_FULL); |
---|
42 | } |
---|
43 | |
---|
44 | int roardsp_swap_uninit (struct roardsp_filter * filter) { |
---|
45 | if ( filter == NULL ) |
---|
46 | return -1; |
---|
47 | |
---|
48 | if ( filter->inst == NULL ) |
---|
49 | return -1; |
---|
50 | |
---|
51 | roar_mm_free(filter->inst); |
---|
52 | |
---|
53 | return 0; |
---|
54 | } |
---|
55 | |
---|
56 | int roardsp_swap_calc162(struct roardsp_filter * filter, void * data, size_t samples) { |
---|
57 | int16_t * d = data; |
---|
58 | register int16_t s; |
---|
59 | int i; |
---|
60 | |
---|
61 | for (i = 0; i < samples; i += 2) { |
---|
62 | ROAR_DBG("roardsp_swap_calc162(*): d[i]=%i, d[i+1]=%i", d[i], d[i+1]); |
---|
63 | s = d[i]; |
---|
64 | d[i] = d[i+1]; |
---|
65 | d[i+1] = s; |
---|
66 | } |
---|
67 | |
---|
68 | return 0; |
---|
69 | } |
---|
70 | |
---|
71 | int roardsp_swap_ctl (struct roardsp_filter * filter, int cmd, void * data) { |
---|
72 | return -1; |
---|
73 | } |
---|
74 | |
---|
75 | int roardsp_swap_reset (struct roardsp_filter * filter, int what) { |
---|
76 | struct roardsp_swap * inst = NULL; |
---|
77 | int i; |
---|
78 | |
---|
79 | if ( filter == NULL ) |
---|
80 | return -1; |
---|
81 | |
---|
82 | if ( (inst = filter->inst) == NULL ) |
---|
83 | return -1; |
---|
84 | |
---|
85 | switch (what) { |
---|
86 | case ROARDSP_RESET_NONE: |
---|
87 | case ROARDSP_RESET_STATE: |
---|
88 | return 0; |
---|
89 | break; |
---|
90 | case ROARDSP_RESET_FULL: |
---|
91 | memset(inst, 0, sizeof(struct roardsp_swap)); |
---|
92 | |
---|
93 | for (i = 0; i < ROAR_MAX_CHANNELS; i++) |
---|
94 | inst->map[i] = i; |
---|
95 | |
---|
96 | inst->map[0] = 1; |
---|
97 | inst->map[1] = 0; |
---|
98 | return 0; |
---|
99 | break; |
---|
100 | default: |
---|
101 | return -1; |
---|
102 | } |
---|
103 | |
---|
104 | return -1; |
---|
105 | } |
---|
106 | |
---|
107 | //ll |
---|