1 /* GStreamer
2 * Copyright (C) 2016 Carlos Rafael Giani <dv@pseudoterminal.org>
3 *
4 * gstunalignedvideoparse.c:
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 #include <string.h>
23 #include <stdio.h>
24 #include <gst/gst.h>
25 #include <gst/video/video.h>
26 #include "gstunalignedvideoparse.h"
27 #include "unalignedvideo.h"
28
29 GST_DEBUG_CATEGORY (unaligned_video_parse_debug);
30 #define GST_CAT_DEFAULT unaligned_video_parse_debug
31
32 struct _GstUnalignedVideoParse
33 {
34 GstBin parent;
35 GstElement *inner_parser;
36 };
37
38 struct _GstUnalignedVideoParseClass
39 {
40 GstBinClass parent_class;
41 };
42
43 static GstStaticPadTemplate static_sink_template =
44 GST_STATIC_PAD_TEMPLATE ("sink",
45 GST_PAD_SINK,
46 GST_PAD_ALWAYS,
47 GST_STATIC_CAPS (GST_UNALIGNED_RAW_VIDEO_CAPS)
48 );
49
50 static GstStaticPadTemplate static_src_template =
51 GST_STATIC_PAD_TEMPLATE ("src",
52 GST_PAD_SRC,
53 GST_PAD_ALWAYS,
54 GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL))
55 );
56
57 G_DEFINE_TYPE (GstUnalignedVideoParse, gst_unaligned_video_parse, GST_TYPE_BIN);
58
59 static void
gst_unaligned_video_parse_class_init(GstUnalignedVideoParseClass * klass)60 gst_unaligned_video_parse_class_init (GstUnalignedVideoParseClass * klass)
61 {
62 GstElementClass *element_class;
63
64 GST_DEBUG_CATEGORY_INIT (unaligned_video_parse_debug, "unalignedvideoparse",
65 0, "Unaligned raw video parser");
66
67 element_class = GST_ELEMENT_CLASS (klass);
68
69 gst_element_class_add_pad_template (element_class,
70 gst_static_pad_template_get (&static_sink_template));
71 gst_element_class_add_pad_template (element_class,
72 gst_static_pad_template_get (&static_src_template));
73
74 gst_element_class_set_static_metadata (element_class,
75 "unalignedvideoparse",
76 "Codec/Parser/Bin/Video",
77 "Parse unaligned raw video data",
78 "Carlos Rafael Giani <dv@pseudoterminal.org>");
79 }
80
81 static void
gst_unaligned_video_parse_init(GstUnalignedVideoParse * unaligned_video_parse)82 gst_unaligned_video_parse_init (GstUnalignedVideoParse * unaligned_video_parse)
83 {
84 GstPad *inner_pad;
85 GstPad *ghostpad;
86
87 unaligned_video_parse->inner_parser =
88 gst_element_factory_make ("rawvideoparse", "inner_parser");
89 g_assert (unaligned_video_parse->inner_parser != NULL);
90
91 g_object_set (G_OBJECT (unaligned_video_parse->inner_parser),
92 "use-sink-caps", TRUE, NULL);
93
94 gst_bin_add (GST_BIN (unaligned_video_parse),
95 unaligned_video_parse->inner_parser);
96
97 inner_pad =
98 gst_element_get_static_pad (unaligned_video_parse->inner_parser, "sink");
99 ghostpad =
100 gst_ghost_pad_new_from_template ("sink", inner_pad,
101 gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
102 (unaligned_video_parse), "sink"));
103 gst_element_add_pad (GST_ELEMENT (unaligned_video_parse), ghostpad);
104 gst_object_unref (GST_OBJECT (inner_pad));
105
106 inner_pad = gst_element_get_static_pad (unaligned_video_parse->inner_parser,
107 "src");
108 ghostpad =
109 gst_ghost_pad_new_from_template ("src", inner_pad,
110 gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
111 (unaligned_video_parse), "src"));
112 gst_element_add_pad (GST_ELEMENT (unaligned_video_parse), ghostpad);
113 gst_object_unref (GST_OBJECT (inner_pad));
114 }
115