gstreamer/ges/ges-track-audio-test-source.c

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/* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:ges-track-audio-test-source
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* @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.
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*/
#include "ges-internal.h"
#include "ges-track-object.h"
#include "ges-track-audio-test-source.h"
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G_DEFINE_TYPE (GESTrackAudioTestSource, ges_track_audio_test_source,
GES_TYPE_TRACK_SOURCE);
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struct _GESTrackAudioTestSourcePrivate
{
/* Dummy variable */
void *nothing;
};
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enum
{
PROP_0,
};
static void ges_track_audio_test_source_get_property (GObject * object, guint
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property_id, GValue * value, GParamSpec * pspec);
static void ges_track_audio_test_source_set_property (GObject * object, guint
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property_id, const GValue * value, GParamSpec * pspec);
static GstElement *ges_track_audio_test_source_create_element (GESTrackObject *
self);
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static void
ges_track_audio_test_source_class_init (GESTrackAudioTestSourceClass * klass)
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{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GESTrackObjectClass *bg_class = GES_TRACK_OBJECT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GESTrackAudioTestSourcePrivate));
object_class->get_property = ges_track_audio_test_source_get_property;
object_class->set_property = ges_track_audio_test_source_set_property;
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bg_class->create_element = ges_track_audio_test_source_create_element;
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}
static void
ges_track_audio_test_source_init (GESTrackAudioTestSource * self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
GES_TYPE_TRACK_AUDIO_TEST_SOURCE, GESTrackAudioTestSourcePrivate);
self->freq = 440;
self->volume = 0;
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}
static void
ges_track_audio_test_source_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec)
{
switch (property_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ges_track_audio_test_source_set_property (GObject * object,
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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_track_audio_test_source_create_element (GESTrackObject * trksrc)
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{
GESTrackAudioTestSource *self;
GstElement *ret;
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self = (GESTrackAudioTestSource *) trksrc;
ret = gst_element_factory_make ("audiotestsrc", NULL);
g_object_set (ret, "volume", (gdouble) self->volume, "freq", (gdouble)
self->freq, NULL);
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return ret;
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}
void
ges_track_audio_test_source_set_freq (GESTrackAudioTestSource * self,
gdouble freq)
{
GstElement *element = ges_track_object_get_element (GES_TRACK_OBJECT (self));
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self->freq = freq;
if (element)
g_object_set (element, "freq", (gdouble) freq, NULL);
}
void
ges_track_audio_test_source_set_volume (GESTrackAudioTestSource * self,
gdouble volume)
{
GstElement *element = ges_track_object_get_element (GES_TRACK_OBJECT (self));
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self->volume = volume;
if (element)
g_object_set (element, "volume", (gdouble) volume, NULL);
}
GESTrackAudioTestSource *
ges_track_audio_test_source_new (void)
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{
return g_object_new (GES_TYPE_TRACK_AUDIO_TEST_SOURCE, NULL);
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}