mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-30 12:10:37 +00:00
8b7f0ae3fe
fakesrc doesn't announce video caps, so most video pipelines will just error out with not-negotiated if a fallback element is created.
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/* GStreamer
|
|
* (c) 2005 Ronald S. Bultje <rbultje@ronald.bitfreak.net>
|
|
* (c) 2006 Jan Schmidt <thaytan@noraisin.net>
|
|
* (c) 2008 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., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:element-autovideosrc
|
|
* @see_also: autoaudiosrc, v4l2src, v4lsrc
|
|
*
|
|
* autovideosrc is a video src that automatically detects an appropriate
|
|
* video source to use. It does so by scanning the registry for all elements
|
|
* that have <quote>Source</quote> and <quote>Video</quote> in the class field
|
|
* of their element information, and also have a non-zero autoplugging rank.
|
|
*
|
|
* <refsect2>
|
|
* <title>Example launch line</title>
|
|
* |[
|
|
* gst-launch-1.0 -v -m autovideosrc ! xvimagesink
|
|
* ]|
|
|
* </refsect2>
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gstautovideosrc.h"
|
|
|
|
G_DEFINE_TYPE (GstAutoVideoSrc, gst_auto_video_src, GST_TYPE_AUTO_DETECT);
|
|
|
|
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
|
|
GST_PAD_SRC,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS_ANY);
|
|
|
|
static GstElement *
|
|
gst_auto_video_src_create_fake_element (GstAutoDetect * autodetect)
|
|
{
|
|
GstElement *fake;
|
|
|
|
fake = gst_element_factory_make ("videotestsrc", "fake-auto-video-src");
|
|
if (fake != NULL) {
|
|
g_object_set (fake, "is-live", TRUE, NULL);
|
|
} else {
|
|
GST_ELEMENT_ERROR (autodetect, RESOURCE, NOT_FOUND,
|
|
("Failed to find usable video source element."),
|
|
("Failed to find a usable video source and couldn't create a video"
|
|
"testsrc as fallback either, check your GStreamer installation."));
|
|
/* This will error out with not-negotiated.. */
|
|
fake = gst_element_factory_make ("fakesrc", "fake-auto-video-src");
|
|
}
|
|
return fake;
|
|
}
|
|
|
|
static void
|
|
gst_auto_video_src_class_init (GstAutoVideoSrcClass * klass)
|
|
{
|
|
GstAutoDetectClass *autoclass = GST_AUTO_DETECT_CLASS (klass);
|
|
GstElementClass *eklass = GST_ELEMENT_CLASS (klass);
|
|
|
|
gst_element_class_add_pad_template (eklass,
|
|
gst_static_pad_template_get (&src_template));
|
|
gst_element_class_set_static_metadata (eklass, "Auto video source",
|
|
"Source/Video",
|
|
"Wrapper video source for automatically detected video source",
|
|
"Jan Schmidt <thaytan@noraisin.net>, "
|
|
"Stefan Kost <ensonic@users.sf.net>");
|
|
|
|
autoclass->create_fake_element = gst_auto_video_src_create_fake_element;
|
|
}
|
|
|
|
static void
|
|
gst_auto_video_src_init (GstAutoVideoSrc * src)
|
|
{
|
|
GstAutoDetect *autodetect = GST_AUTO_DETECT (src);
|
|
|
|
autodetect->media_klass = "Video";
|
|
autodetect->flag = GST_ELEMENT_FLAG_SOURCE;
|
|
}
|