1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* Sweep, a sound wave editor.
*
* Copyright (C) 2000 Conrad Parker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <string.h>
#include <gdk/gdkkeysyms.h>
#include <sweep/sweep.h>
#define NR_PARAMS 2
#ifndef __GNUC__
#error GCCisms used here. Please report this error to \
sweep-devel@lists.sourceforge.net stating your versions of sweep \
and your operating system and compiler.
#endif
static sw_param_range delay_range = {
SW_RANGE_LOWER_BOUND_VALID|SW_RANGE_STEP_VALID,
lower: {f: 0.0},
step: {f: 0.001}
};
static sw_param_range gain_range = {
SW_RANGE_ALL_VALID,
lower: {f: 0.0},
upper: {f: 1.0},
step: {f: 0.01}
};
static sw_param_spec param_specs[] = {
{
N_("Delay"),
N_("Time to delay by"),
SWEEP_TYPE_FLOAT,
SW_PARAM_CONSTRAINED_RANGE,
{range: &delay_range},
SW_PARAM_HINT_TIME
},
{
N_("Gain"),
N_("Gain with which to mix in delayed signal"),
SWEEP_TYPE_FLOAT,
SW_PARAM_CONSTRAINED_RANGE,
{range: &gain_range},
SW_PARAM_HINT_DEFAULT
},
};
static void
echo_suggest (sw_sample * sample, sw_param_set pset, gpointer custom_data)
{
pset[0].f = 0.0;
pset[1].f = 0.0;
}
static void
region_echo (gpointer data, sw_format * format, sw_framecount_t nr_frames,
sw_param_set pset, gpointer custom_data)
{
gfloat delay = pset[0].f;
gfloat gain = pset[1].f;
sw_framecount_t i, delay_f, dlen_s;
sw_audio_t * d, * e;
gpointer ep;
delay_f = time_to_frames (format, delay);
d = (sw_audio_t *)data;
ep = data + frames_to_bytes (format, delay_f);
e = (sw_audio_t *)ep;
if (delay > nr_frames) return;
dlen_s = frames_to_samples (format, nr_frames - delay_f);
for (i = 0; i < dlen_s; i++) {
e[i] += (sw_audio_t)((gfloat)(d[i]) * gain);
}
}
static sw_op_instance *
echo_apply (sw_sample * sample, sw_param_set pset, gpointer custom_data)
{
return
perform_filter_region_op (sample, _("Echo"),
(SweepFilterRegion)region_echo, pset, NULL);
}
static sw_procedure proc_echo = {
N_("Echo"),
N_("Apply an echo to selected regions of a sample"),
"Conrad Parker",
"Copyright (C) 2000",
"http://sweep.sourceforge.net/plugins/echo",
"Filters/Echo", /* identifier */
GDK_e, /* accel_key */
GDK_SHIFT_MASK, /* accel_mods */
NR_PARAMS, /* nr_params */
param_specs, /* param_specs */
echo_suggest, /* suggests() */
echo_apply,
NULL, /* custom_data */
};
static GList *
echo_init (void)
{
return g_list_append ((GList *)NULL, &proc_echo);
}
sw_plugin plugin = {
echo_init, /* plugin_init */
NULL, /* plugin_cleanup */
};
|
