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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* XMMS Crossfade Plugin
* Copyright (C) 2000-2004 Peter Eisenlohr <peter@eisenlohr.org>
*
* based on the original OSS Output Plugin
* Copyright (C) 1998-2000 Peter Alm, Mikael Alm, Olle Hallnas, Thomas Nilsson and 4Front Technologies
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include "effect.h"
void
effect_init(effect_context_t *ec,
EffectPlugin *ep)
{
memset(ec, 0, sizeof(*ec));
effect_set_plugin(ec, ep);
}
static char *
plugin_name(EffectPlugin *ep)
{
return ep->description ? ep->description : "<unnamed>";
}
void
effect_set_plugin(effect_context_t *ec,
EffectPlugin *ep)
{
if(ec->use_xmms_plugin && (ep == EFFECT_USE_XMMS_PLUGIN)) return;
if(ec->ep == ep) return;
if(ec->last_ep) {
if(ec->last_ep->cleanup) {
DEBUG(("[crossfade] effect: \"%s\" deselected, cleanup\n", plugin_name(ec->last_ep)));
ec->last_ep->cleanup();
}
else
DEBUG(("[crossfade] effect: \"%s\" deselected\n", plugin_name(ec->last_ep)));
}
ec->use_xmms_plugin = (ep == EFFECT_USE_XMMS_PLUGIN);
ec->ep = ec->use_xmms_plugin ? NULL : ep;
ec->last_ep = ec->ep;
ec->is_active = FALSE;
if(ec->ep) {
if(ec->ep->init) {
DEBUG(("[crossfade] effect: \"%s\" selected, init\n", plugin_name(ec->ep)));
ec->ep->init();
}
else
DEBUG(("[crossfade] effect: \"%s\" selected\n", plugin_name(ec->ep)));
}
}
gint
effect_flow(effect_context_t *ec,
gpointer *buffer,
gint length,
format_t *format,
gboolean allow_format_change)
{
EffectPlugin *ep;
if(ec->use_xmms_plugin ? effects_enabled() : (ec->ep != NULL)) {
ep = ec->use_xmms_plugin ? get_current_effect_plugin() : ec->ep;
if(ep != ec->last_ep) {
DEBUG(("[crossfade] effect: plugin: \"%s\"%s\n",
ep ? plugin_name(ep) : "<none>",
ec->use_xmms_plugin ? " (XMMS)" : ""));
ec->last_ep = ep;
ec->is_active = FALSE;
}
if(ep == NULL) return length;
if(ep->query_format) {
AFormat fmt = format->fmt;
gint rate = format->rate;
gint nch = format->nch;
ep->query_format(&fmt, &rate, &nch);
if(!ec->is_active
|| (ec->fmt != fmt)
|| (ec->rate != rate)
|| (ec->nch != nch)) {
if(!allow_format_change && (!format_match(fmt, format->fmt) ||
(rate != format->rate) ||
(nch != format->nch))) {
DEBUG(("[crossfade] effect: format mismatch: "
"in=(%s/%d/%d) out=(%s/%d/%d)\n",
format_name(format->fmt), format->rate, format->nch,
format_name(fmt), rate, nch));
ec->is_valid = FALSE;
}
else {
if(setup_format(fmt, rate, nch, &ec->format) < 0) {
DEBUG(("[crossfade] effect: format not supported "
"(fmt=%s rate=%d nch=%d)!\n",
format_name(fmt), rate, nch));
ec->is_valid = FALSE;
}
else {
ec->is_valid = TRUE;
DEBUG(("[crossfade] effect: plugin enabled "
"(fmt=%s rate=%d nch=%d)\n", format_name(fmt), rate, nch));
}
}
ec->is_active = TRUE;
ec->fmt = fmt;
ec->rate = rate;
ec->nch = nch;
}
if(ec->is_valid && ep->mod_samples) {
length = ep->mod_samples(buffer, length, format->fmt, format->rate, format->nch);
if(allow_format_change) format_copy(format, &ec->format);
}
}
else {
ec->is_active = TRUE;
if(ep->mod_samples)
length = ep->mod_samples(buffer, length, format->fmt, format->rate, format->nch);
}
}
else if(ec->is_active) {
ec->is_active = FALSE;
DEBUG(("[crossfade] effect: plugin disabled\n"));
}
return length;
}
void
effect_free(effect_context_t *ec)
{
/* nothing to do */
}
|
