gstreamer/ges/ges-screenshot.c
2012-05-19 13:57:35 -04:00

60 lines
2.1 KiB
C

/* Small helper element for format conversion
* Copyright (C) 2005 Tim-Philipp Müller <tim centricular net>
* Copyright (C) 2010 Brandon Lewis <brandon.lewis@collabora.co.uk>
*
* 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.
*/
#include <gst/gst.h>
#include <gst/video/video.h>
#include "ges-screenshot.h"
#include "ges-internal.h"
/**
* ges_play_sink_convert_frame:
* @playsink: The olaysink to get last frame from
* @caps: The caps defining the format the return value will have
*
* Get the last buffer @playsink showed
*
* Returns: (transfer full): A #GstBuffer containing the last frame from
* @playsink in the format defined by the @caps
*/
GstBuffer *
ges_play_sink_convert_frame (GstElement * playsink, GstCaps * caps)
{
GstBuffer *result;
g_object_get (G_OBJECT (playsink), "frame", (GstMiniObject *) & result, NULL);
GST_DEBUG ("got buffer %p from playsink", result);
if (result != NULL && caps != NULL) {
GstBuffer *temp;
GError *err = NULL;
temp = gst_video_convert_frame (result, caps, 25 * GST_SECOND, &err);
gst_buffer_unref (result);
if (temp == NULL && err) {
/* I'm really uncertain whether we should make playsink post an error
* on the bus or not. It's not like it's a critical issue regarding
* playsink behaviour. */
GST_ERROR ("Error converting frame: %s", err->message);
}
result = temp;
}
return result;
}