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95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/* GStreamer
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* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
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* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
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* (c) 2008 Stefan Kost <ensonic@users.sf.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-autoaudiosrc
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* @title: autoaudiosrc
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* @see_also: autovideosrc, alsasrc, osssrc
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*
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* autoaudiosrc is an audio source that automatically detects an appropriate
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* audio source to use. It does so by scanning the registry for all elements
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* that have <quote>Source</quote> and <quote>Audio</quote> in the class field
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* of their element information, and also have a non-zero autoplugging rank.
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*
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* ## Example launch line
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* |[
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* gst-launch-1.0 -v -m autoaudiosrc ! audioconvert ! audioresample ! autoaudiosink
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* ]|
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstautoaudiosrc.h"
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G_DEFINE_TYPE (GstAutoAudioSrc, gst_auto_audio_src, GST_TYPE_AUTO_DETECT);
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS_ANY);
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static GstElement *
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gst_auto_audio_src_create_fake_element (GstAutoDetect * autodetect)
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{
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GstElement *fake;
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fake = gst_element_factory_make ("audiotestsrc", "fake-auto-audio-src");
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if (fake != NULL) {
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g_object_set (fake, "is-live", TRUE, NULL);
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gst_util_set_object_arg (G_OBJECT (fake), "wave", "silence");
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} else {
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GST_ELEMENT_ERROR (autodetect, RESOURCE, NOT_FOUND,
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("Failed to find usable audio source element."),
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("Failed to find a usable audio source and couldn't create an audio"
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"testsrc as fallback either, check your GStreamer installation."));
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/* This will error out with not-negotiated.. */
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fake = gst_element_factory_make ("fakesrc", "fake-auto-audio-src");
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}
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return fake;
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}
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static void
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gst_auto_audio_src_class_init (GstAutoAudioSrcClass * klass)
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{
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GstAutoDetectClass *autoclass = GST_AUTO_DETECT_CLASS (klass);
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GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_static_pad_template (eklass, &src_template);
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gst_element_class_set_static_metadata (eklass, "Auto audio source",
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"Source/Audio",
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"Wrapper audio source for automatically detected audio source",
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"Jan Schmidt <thaytan@noraisin.net>, "
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"Stefan Kost <ensonic@users.sf.net>");
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autoclass->create_fake_element = gst_auto_audio_src_create_fake_element;
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}
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static void
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gst_auto_audio_src_init (GstAutoAudioSrc * src)
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{
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GstAutoDetect *autodetect = GST_AUTO_DETECT (src);
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autodetect->media_klass = "Audio";
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autodetect->flag = GST_ELEMENT_FLAG_SOURCE;
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}
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