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
|
/* GStreamer
* Copyright (C) <2007> Stefan Kost <ensonic@users.sf.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:element-equalizer-3bands
* @short_description: 3-band equalizer
*
* <refsect2>
* <para>
* The 3-band equalizer element allows to change the gain of a low frequency,
* medium frequency and high frequency band.
* </para>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch filesrc location=song.ogg ! oggdemux ! vorbisdec ! audioconvert ! equalizer-3bands band1=6.0 ! alsasink
* </programlisting>
* This raises the volume of the 2nd band, which is at 1110 Hz, by 6 db.
* </para>
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstiirequalizer.h"
#include "gstiirequalizer3bands.h"
enum
{
ARG_BAND0 = 1,
ARG_BAND1,
ARG_BAND2,
};
static void gst_iir_equalizer_3bands_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_iir_equalizer_3bands_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
GST_DEBUG_CATEGORY_EXTERN (equalizer_debug);
#define GST_CAT_DEFAULT equalizer_debug
GST_BOILERPLATE (GstIirEqualizer3Bands, gst_iir_equalizer_3bands,
GstIirEqualizer, GST_TYPE_IIR_EQUALIZER);
/* equalizer implementation */
static void
gst_iir_equalizer_3bands_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
const GstElementDetails iir_equalizer_details =
GST_ELEMENT_DETAILS ("3 Band Equalizer",
"Filter/Effect/Audio",
"Direct Form 3 band IIR equalizer",
"Stefan Kost <ensonic@users.sf.net>");
gst_element_class_set_details (element_class, &iir_equalizer_details);
}
static void
gst_iir_equalizer_3bands_class_init (GstIirEqualizer3BandsClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->set_property = gst_iir_equalizer_3bands_set_property;
gobject_class->get_property = gst_iir_equalizer_3bands_get_property;
g_object_class_install_property (gobject_class, ARG_BAND0,
g_param_spec_double ("band0", "110 Hz",
"gain for the frequency band 100 Hz, ranging from -24.0 to +12.0",
-24.0, 12.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
g_object_class_install_property (gobject_class, ARG_BAND1,
g_param_spec_double ("band1", "1100 Hz",
"gain for the frequency band 1100 Hz, ranging from -24.0 to +12.0",
-24.0, 12.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
g_object_class_install_property (gobject_class, ARG_BAND2,
g_param_spec_double ("band2", "11 kHz",
"gain for the frequency band 11 kHz, ranging from -24.0 to +12.0",
-24.0, 12.0, 0.0, G_PARAM_READWRITE | GST_PARAM_CONTROLLABLE));
}
static void
gst_iir_equalizer_3bands_init (GstIirEqualizer3Bands * equ_n,
GstIirEqualizer3BandsClass * g_class)
{
GstIirEqualizer *equ = GST_IIR_EQUALIZER (equ_n);
gst_iir_equalizer_compute_frequencies (equ, 3);
}
static void
gst_iir_equalizer_3bands_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
switch (prop_id) {
case ARG_BAND0:
gst_child_proxy_set_property (GST_OBJECT (equ), "band0::gain", value);
break;
case ARG_BAND1:
gst_child_proxy_set_property (GST_OBJECT (equ), "band1::gain", value);
break;
case ARG_BAND2:
gst_child_proxy_set_property (GST_OBJECT (equ), "band2::gain", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_iir_equalizer_3bands_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstIirEqualizer *equ = GST_IIR_EQUALIZER (object);
switch (prop_id) {
case ARG_BAND0:
gst_child_proxy_get_property (GST_OBJECT (equ), "band0::gain", value);
break;
case ARG_BAND1:
gst_child_proxy_get_property (GST_OBJECT (equ), "band1::gain", value);
break;
case ARG_BAND2:
gst_child_proxy_get_property (GST_OBJECT (equ), "band2::gain", value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
|
