2 * (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
3 * (c) 2006 Jan Schmidt <thaytan@noraisin.net>
4 * (c) 2008 Stefan Kost <ensonic@users.sf.net>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
23 * SECTION:element-autoaudiosrc
24 * @see_also: autovideosrc, alsasrc, osssrc
26 * autoaudiosrc is an audio source that automatically detects an appropriate
27 * audio source to use. It does so by scanning the registry for all elements
28 * that have <quote>Source</quote> and <quote>Audio</quote> in the class field
29 * of their element information, and also have a non-zero autoplugging rank.
32 * <title>Example launch line</title>
34 * gst-launch-1.0 -v -m autoaudiosrc ! audioconvert ! audioresample ! autoaudiosink
43 #include "gstautoaudiosrc.h"
45 G_DEFINE_TYPE (GstAutoAudioSrc, gst_auto_audio_src, GST_TYPE_AUTO_DETECT);
47 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
53 gst_auto_audio_src_create_fake_element (GstAutoDetect * autodetect)
57 fake = gst_element_factory_make ("audiotestsrc", "fake-auto-audio-src");
59 g_object_set (fake, "is-live", TRUE, NULL);
60 gst_util_set_object_arg (G_OBJECT (fake), "wave", "silence");
62 GST_ELEMENT_ERROR (autodetect, RESOURCE, NOT_FOUND,
63 ("Failed to find usable audio source element."),
64 ("Failed to find a usable audio source and couldn't create an audio"
65 "testsrc as fallback either, check your GStreamer installation."));
66 /* This will error out with not-negotiated.. */
67 fake = gst_element_factory_make ("fakesrc", "fake-auto-audio-src");
73 gst_auto_audio_src_class_init (GstAutoAudioSrcClass * klass)
75 GstAutoDetectClass *autoclass = GST_AUTO_DETECT_CLASS (klass);
76 GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
78 gst_element_class_add_static_pad_template (eklass, &src_template);
79 gst_element_class_set_static_metadata (eklass, "Auto audio source",
81 "Wrapper audio source for automatically detected audio source",
82 "Jan Schmidt <thaytan@noraisin.net>, "
83 "Stefan Kost <ensonic@users.sf.net>");
85 autoclass->create_fake_element = gst_auto_audio_src_create_fake_element;
89 gst_auto_audio_src_init (GstAutoAudioSrc * src)
91 GstAutoDetect *autodetect = GST_AUTO_DETECT (src);
93 autodetect->media_klass = "Audio";
94 autodetect->flag = GST_ELEMENT_FLAG_SOURCE;