mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-30 04:00:37 +00:00
119 lines
3.1 KiB
C
119 lines
3.1 KiB
C
/* GStreamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
* Library <2002> Ronald Bultje <rbultje@ronald.bitfreak.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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include "video.h"
|
|
|
|
/* This is simply a convenience function, nothing more or less */
|
|
|
|
gfloat
|
|
gst_video_frame_rate (GstPad *pad)
|
|
{
|
|
gfloat fps = 0.;
|
|
GstCaps *caps;
|
|
|
|
/* get pad caps */
|
|
caps = GST_PAD_CAPS (pad);
|
|
if (caps == NULL) {
|
|
g_warning ("gstvideo: failed to get caps of pad %s:%s",
|
|
GST_ELEMENT_NAME (gst_pad_get_parent (pad)),
|
|
GST_PAD_NAME(pad));
|
|
return 0.;
|
|
}
|
|
|
|
if (!gst_caps_has_property_typed (caps, "framerate",
|
|
GST_PROPS_FLOAT_TYPE)) {
|
|
g_warning ("gstvideo: failed to get framerate property of pad %s:%s",
|
|
GST_ELEMENT_NAME (gst_pad_get_parent (pad)),
|
|
GST_PAD_NAME (pad));
|
|
return 0.;
|
|
}
|
|
|
|
gst_caps_get_float (caps, "framerate", &fps);
|
|
|
|
GST_DEBUG ("Framerate request on pad %s:%s: %f",
|
|
GST_ELEMENT_NAME (gst_pad_get_parent (pad)),
|
|
GST_PAD_NAME(pad), fps);
|
|
|
|
return fps;
|
|
}
|
|
|
|
gboolean
|
|
gst_video_get_size (GstPad *pad,
|
|
gint *width,
|
|
gint *height)
|
|
{
|
|
GstCaps *caps;
|
|
|
|
g_return_val_if_fail (pad != NULL, FALSE);
|
|
|
|
caps = GST_PAD_CAPS (pad);
|
|
|
|
if (caps == NULL) {
|
|
g_warning ("gstvideo: failed to get caps of pad %s:%s",
|
|
GST_ELEMENT_NAME (gst_pad_get_parent (pad)),
|
|
GST_PAD_NAME(pad));
|
|
return FALSE;
|
|
}
|
|
|
|
if (!gst_caps_has_property_typed (caps, "width",
|
|
GST_PROPS_INT_TYPE) ||
|
|
!gst_caps_has_property_typed (caps, "height",
|
|
GST_PROPS_FLOAT_TYPE)) {
|
|
g_warning ("gstvideo: failed to get size properties on pad %s:%s",
|
|
GST_ELEMENT_NAME (gst_pad_get_parent (pad)),
|
|
GST_PAD_NAME(pad));
|
|
return FALSE;
|
|
}
|
|
|
|
if (width)
|
|
gst_caps_get_int (caps, "width", width);
|
|
if (height)
|
|
gst_caps_get_int (caps, "height", height);
|
|
|
|
GST_DEBUG ("size request on pad %s:%s: %dx%d",
|
|
GST_ELEMENT_NAME (gst_pad_get_parent (pad)),
|
|
GST_PAD_NAME (pad),
|
|
width ? *width : -1,
|
|
height ? *height : -1);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin *plugin)
|
|
{
|
|
return TRUE;
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (
|
|
GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
"gstvideo",
|
|
"Convenience routines for video plugins",
|
|
plugin_init,
|
|
VERSION,
|
|
GST_LICENSE,
|
|
GST_PACKAGE,
|
|
GST_ORIGIN
|
|
)
|