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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/* GStreamer Editing Services
* Copyright (C) 2010 Brandon Lewis <brandon.lewis@collabora.co.uk>
* 2010 Nokia Corporation
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gesaudiotestsource
* @title: GESAudioTestSource
* @short_description: produce a simple test waveform or silence
*
* Outputs a test audio stream using audiotestsrc. The default property values
* output silence. Useful for testing pipelines, or to fill gaps in an audio
* track.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges-track-element.h"
#include "ges-audio-test-source.h"
#define DEFAULT_VOLUME 1.0
struct _GESAudioTestSourcePrivate
{
gdouble freq;
gdouble volume;
};
enum
{
PROP_0,
};
G_DEFINE_TYPE_WITH_PRIVATE (GESAudioTestSource, ges_audio_test_source,
GES_TYPE_AUDIO_SOURCE);
static void ges_audio_test_source_get_property (GObject * object, guint
property_id, GValue * value, GParamSpec * pspec);
static void ges_audio_test_source_set_property (GObject * object, guint
property_id, const GValue * value, GParamSpec * pspec);
static GstElement *ges_audio_test_source_create_source (GESTrackElement * self);
static void
ges_audio_test_source_class_init (GESAudioTestSourceClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESAudioSourceClass *source_class = GES_AUDIO_SOURCE_CLASS (klass);
object_class->get_property = ges_audio_test_source_get_property;
object_class->set_property = ges_audio_test_source_set_property;
source_class->create_source = ges_audio_test_source_create_source;
}
static void
ges_audio_test_source_init (GESAudioTestSource * self)
{
self->priv = ges_audio_test_source_get_instance_private (self);
self->priv->freq = 440;
self->priv->volume = DEFAULT_VOLUME;
}
static void
ges_audio_test_source_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_audio_test_source_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static GstElement *
ges_audio_test_source_create_source (GESTrackElement * trksrc)
{
GESAudioTestSource *self;
GstElement *ret;
const gchar *props[] = { "volume", "freq", NULL };
self = (GESAudioTestSource *) trksrc;
ret = gst_element_factory_make ("audiotestsrc", NULL);
g_object_set (ret, "volume", (gdouble) self->priv->volume, "freq", (gdouble)
self->priv->freq, NULL);
ges_track_element_add_children_props (trksrc, ret, NULL, NULL, props);
return ret;
}
/**
* ges_audio_test_source_set_freq:
* @self: a #GESAudioTestSource
* @freq: The frequency you want to apply on @self
*
* Lets you set the frequency applied on the track element
*/
void
ges_audio_test_source_set_freq (GESAudioTestSource * self, gdouble freq)
{
GstElement *element =
ges_track_element_get_element (GES_TRACK_ELEMENT (self));
self->priv->freq = freq;
if (element) {
GValue val = { 0 };
g_value_init (&val, G_TYPE_DOUBLE);
g_value_set_double (&val, freq);
ges_track_element_set_child_property (GES_TRACK_ELEMENT (self), "freq",
&val);
}
}
/**
* ges_audio_test_source_set_volume:
* @self: a #GESAudioTestSource
* @volume: The volume you want to apply on @self
*
* Sets the volume of the test audio signal.
*/
void
ges_audio_test_source_set_volume (GESAudioTestSource * self, gdouble volume)
{
GstElement *element =
ges_track_element_get_element (GES_TRACK_ELEMENT (self));
self->priv->volume = volume;
if (element) {
GValue val = { 0 };
g_value_init (&val, G_TYPE_DOUBLE);
g_value_set_double (&val, volume);
ges_track_element_set_child_property (GES_TRACK_ELEMENT (self), "volume",
&val);
}
}
/**
* ges_audio_test_source_get_freq:
* @self: a #GESAudioTestSource
*
* Get the current frequency of @self.
*
* Returns: The current frequency of @self.
*/
double
ges_audio_test_source_get_freq (GESAudioTestSource * self)
{
GValue val = { 0 };
ges_track_element_get_child_property (GES_TRACK_ELEMENT (self), "freq", &val);
return g_value_get_double (&val);
}
/**
* ges_audio_test_source_get_volume:
* @self: a #GESAudioTestSource
*
* Get the current volume of @self.
*
* Returns: The current volume of @self
*/
double
ges_audio_test_source_get_volume (GESAudioTestSource * self)
{
GValue val = { 0 };
ges_track_element_get_child_property (GES_TRACK_ELEMENT (self), "volume",
&val);
return g_value_get_double (&val);
}
/* Creates a new #GESAudioTestSource.
*
* Returns: (transfer floating) (nullable): The newly created #GESAudioTestSource.
*/
GESAudioTestSource *
ges_audio_test_source_new (void)
{
GESAudioTestSource *res;
GESAsset *asset = ges_asset_request (GES_TYPE_AUDIO_TEST_SOURCE, NULL, NULL);
res = GES_AUDIO_TEST_SOURCE (ges_asset_extract (asset, NULL));
gst_object_unref (asset);
return res;
}
|
