1 /* GStreamer
2 * Copyright (C) 2016 Carlos Rafael Giani <dv@pseudoterminal.org>
3 *
4 * gstunalignedaudioparse.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/audio/audio.h>
26 #include "gstunalignedaudioparse.h"
27 #include "gstrawparseelements.h"
28 #include "unalignedaudio.h"
29
30 GST_DEBUG_CATEGORY (unaligned_audio_parse_debug);
31 #define GST_CAT_DEFAULT unaligned_audio_parse_debug
32
33 struct _GstUnalignedAudioParse
34 {
35 GstBin parent;
36 GstElement *inner_parser;
37 };
38
39 static GstStaticPadTemplate static_sink_template =
40 GST_STATIC_PAD_TEMPLATE ("sink",
41 GST_PAD_SINK,
42 GST_PAD_ALWAYS,
43 GST_STATIC_CAPS (GST_UNALIGNED_RAW_AUDIO_CAPS)
44 );
45
46 static GstStaticPadTemplate static_src_template =
47 GST_STATIC_PAD_TEMPLATE ("src",
48 GST_PAD_SRC,
49 GST_PAD_ALWAYS,
50 GST_STATIC_CAPS (GST_AUDIO_CAPS_MAKE (GST_AUDIO_FORMATS_ALL)
51 ", layout = (string) { interleaved, non-interleaved }")
52 );
53
54 G_DEFINE_TYPE (GstUnalignedAudioParse, gst_unaligned_audio_parse, GST_TYPE_BIN);
55 GST_ELEMENT_REGISTER_DEFINE (unalignedaudioparse,
56 "unalignedaudioparse", GST_RANK_MARGINAL, GST_TYPE_UNALIGNED_AUDIO_PARSE);
57
58 static void
gst_unaligned_audio_parse_class_init(GstUnalignedAudioParseClass * klass)59 gst_unaligned_audio_parse_class_init (GstUnalignedAudioParseClass * klass)
60 {
61 GstElementClass *element_class;
62
63 GST_DEBUG_CATEGORY_INIT (unaligned_audio_parse_debug, "unalignedaudioparse",
64 0, "Unaligned raw audio parser");
65
66 element_class = GST_ELEMENT_CLASS (klass);
67
68 gst_element_class_add_pad_template (element_class,
69 gst_static_pad_template_get (&static_sink_template));
70 gst_element_class_add_pad_template (element_class,
71 gst_static_pad_template_get (&static_src_template));
72
73 gst_element_class_set_static_metadata (element_class,
74 "unalignedaudioparse",
75 "Codec/Parser/Bin/Audio",
76 "Parse unaligned raw audio data",
77 "Carlos Rafael Giani <dv@pseudoterminal.org>");
78 }
79
80 static void
gst_unaligned_audio_parse_init(GstUnalignedAudioParse * unaligned_audio_parse)81 gst_unaligned_audio_parse_init (GstUnalignedAudioParse * unaligned_audio_parse)
82 {
83 GstPad *inner_pad;
84 GstPad *ghostpad;
85
86 unaligned_audio_parse->inner_parser =
87 gst_element_factory_make ("rawaudioparse", "inner_parser");
88 g_assert (unaligned_audio_parse->inner_parser != NULL);
89
90 g_object_set (G_OBJECT (unaligned_audio_parse->inner_parser),
91 "use-sink-caps", TRUE, NULL);
92
93 gst_bin_add (GST_BIN (unaligned_audio_parse),
94 unaligned_audio_parse->inner_parser);
95
96 inner_pad =
97 gst_element_get_static_pad (unaligned_audio_parse->inner_parser, "sink");
98 ghostpad =
99 gst_ghost_pad_new_from_template ("sink", inner_pad,
100 gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
101 (unaligned_audio_parse), "sink"));
102 gst_element_add_pad (GST_ELEMENT (unaligned_audio_parse), ghostpad);
103 gst_object_unref (GST_OBJECT (inner_pad));
104
105 inner_pad = gst_element_get_static_pad (unaligned_audio_parse->inner_parser,
106 "src");
107 ghostpad =
108 gst_ghost_pad_new_from_template ("src", inner_pad,
109 gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS
110 (unaligned_audio_parse), "src"));
111 gst_element_add_pad (GST_ELEMENT (unaligned_audio_parse), ghostpad);
112 gst_object_unref (GST_OBJECT (inner_pad));
113 }
114