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/* 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 */
gdouble
gst_video_frame_rate (GstPad *pad)
{
gdouble fps = 0.;
GstCaps *caps;
GstStructure *structure;
/* 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.;
}
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_double (structure, "framerate", &fps)){
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_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;
GstStructure *structure;
gboolean ret;
g_return_val_if_fail (pad != NULL, FALSE);
g_return_val_if_fail (width != NULL, FALSE);
g_return_val_if_fail (height != 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;
}
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", width);
ret &= gst_structure_get_int (structure, "height", height);
if (!ret) {
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;
}
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
)
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