mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 20:21:24 +00:00
103 lines
3 KiB
C
103 lines
3 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 */
|
|
|
|
gdouble
|
|
gst_video_frame_rate (GstPad * pad)
|
|
{
|
|
gdouble fps = 0.;
|
|
const GstCaps *caps = NULL;
|
|
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)
|
|
{
|
|
const GstCaps *caps = NULL;
|
|
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)
|