1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/* GStreamer
* Copyright (C) 2011 Collabora Ltd.
* Copyright (C) 2011 Intel
*
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
*
* 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 "gstsurfaceconverter.h"
#include "gstsurfacebuffer.h"
/**
* SECTION:gstsurfaceconverter
* @short_description: Interface for #GstSurfaceBuffer conversion
*
* Objects implementing this interface are used as a conversion context. This
* allows elements to optimize the upload by keeping ahold of required resources
* between uploads. The context must be discarded when the pipeline goes to
* #GST_STATE_NULL or renewed whenever the caps are changed.
* <note>
* The GstVideoContext interface is unstable API and may change in future.
* One can define GST_USE_UNSTABLE_API to acknowledge and avoid this warning.
* </note>
*
* <refsect2>
* <title>Example uploading to GL texture</title>
* |[
* if (G_UNLIKELY (priv->converter == NULL))
* priv->converter = gst_surface_buffer_create_converter (surface, "opengl", &value);
*
* gst_surface_converter_upload (priv->converter, surface);
* ]|
* </refsect2>
*/
G_DEFINE_INTERFACE (GstSurfaceConverter, gst_surface_converter, G_TYPE_INVALID);
static void
gst_surface_converter_default_init (GstSurfaceConverterInterface * iface)
{
/* default virtual functions */
iface->upload = NULL;
}
/**
* gst_surface_converter_upload:
* @converter: a #GstSurfaceConverter
* @buffer: the #GstSurfaceBuffer to upload
*
* Convert and uploads the #GstSurfaceBuffer to the converter destination.
*
* Returns: #TRUE on success, #FALSE otherwise
*/
gboolean
gst_surface_converter_upload (GstSurfaceConverter * converter,
GstSurfaceBuffer * buffer)
{
g_return_val_if_fail (GST_IS_SURFACE_CONVERTER (converter), FALSE);
g_return_val_if_fail (GST_IS_SURFACE_BUFFER (buffer), FALSE);
return GST_SURFACE_CONVERTER_GET_IFACE (converter)->upload (converter,
buffer);
}
|
