1 /* GStreamer
2 * Copyright (C) 2010 David Schleef <ds@schleef.org>
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23
24 #include <gst/gst.h>
25 #include <gst/base/gstbasesink.h>
26 #include "gstchecksumsink.h"
27
28 static void gst_checksum_sink_set_property (GObject * object, guint prop_id,
29 const GValue * value, GParamSpec * pspec);
30 static void gst_checksum_sink_get_property (GObject * object, guint prop_id,
31 GValue * value, GParamSpec * pspec);
32 static void gst_checksum_sink_dispose (GObject * object);
33 static void gst_checksum_sink_finalize (GObject * object);
34
35 static gboolean gst_checksum_sink_start (GstBaseSink * sink);
36 static gboolean gst_checksum_sink_stop (GstBaseSink * sink);
37 static GstFlowReturn
38 gst_checksum_sink_render (GstBaseSink * sink, GstBuffer * buffer);
39
40 enum
41 {
42 PROP_0,
43 PROP_HASH,
44 };
45
46 static GstStaticPadTemplate gst_checksum_sink_sink_template =
47 GST_STATIC_PAD_TEMPLATE ("sink",
48 GST_PAD_SINK,
49 GST_PAD_ALWAYS,
50 GST_STATIC_CAPS_ANY);
51
52 /* class initialization */
53
54 #define GST_TYPE_CHECKSUM_SINK_HASH (gst_checksum_sink_hash_get_type ())
55 static GType
gst_checksum_sink_hash_get_type(void)56 gst_checksum_sink_hash_get_type (void)
57 {
58 static GType gtype = 0;
59
60 if (gtype == 0) {
61 static const GEnumValue values[] = {
62 {G_CHECKSUM_MD5, "MD5", "md5"},
63 {G_CHECKSUM_SHA1, "SHA-1", "sha1"},
64 {G_CHECKSUM_SHA256, "SHA-256", "sha256"},
65 {G_CHECKSUM_SHA512, "SHA-512", "sha512"},
66 {0, NULL, NULL},
67 };
68
69 gtype = g_enum_register_static ("GstChecksumSinkHash", values);
70 }
71 return gtype;
72 }
73
74 #define gst_checksum_sink_parent_class parent_class
75 G_DEFINE_TYPE (GstChecksumSink, gst_checksum_sink, GST_TYPE_BASE_SINK);
76
77 static void
gst_checksum_sink_class_init(GstChecksumSinkClass * klass)78 gst_checksum_sink_class_init (GstChecksumSinkClass * klass)
79 {
80 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
81 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
82 GstBaseSinkClass *base_sink_class = GST_BASE_SINK_CLASS (klass);
83
84 gobject_class->set_property = gst_checksum_sink_set_property;
85 gobject_class->get_property = gst_checksum_sink_get_property;
86 gobject_class->dispose = gst_checksum_sink_dispose;
87 gobject_class->finalize = gst_checksum_sink_finalize;
88 base_sink_class->start = GST_DEBUG_FUNCPTR (gst_checksum_sink_start);
89 base_sink_class->stop = GST_DEBUG_FUNCPTR (gst_checksum_sink_stop);
90 base_sink_class->render = GST_DEBUG_FUNCPTR (gst_checksum_sink_render);
91
92 gst_element_class_add_static_pad_template (element_class,
93 &gst_checksum_sink_sink_template);
94
95 g_object_class_install_property (gobject_class, PROP_HASH,
96 g_param_spec_enum ("hash", "Hash", "Checksum type",
97 gst_checksum_sink_hash_get_type (), G_CHECKSUM_SHA1,
98 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
99
100 gst_element_class_set_static_metadata (element_class, "Checksum sink",
101 "Debug/Sink", "Calculates a checksum for buffers",
102 "David Schleef <ds@schleef.org>");
103 }
104
105 static void
gst_checksum_sink_init(GstChecksumSink * checksumsink)106 gst_checksum_sink_init (GstChecksumSink * checksumsink)
107 {
108 gst_base_sink_set_sync (GST_BASE_SINK (checksumsink), FALSE);
109 checksumsink->hash = G_CHECKSUM_SHA1;
110 }
111
112 static void
gst_checksum_sink_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)113 gst_checksum_sink_set_property (GObject * object, guint prop_id,
114 const GValue * value, GParamSpec * pspec)
115 {
116 GstChecksumSink *checksumsink = GST_CHECKSUM_SINK (object);
117
118 switch (prop_id) {
119 case PROP_HASH:
120 checksumsink->hash = g_value_get_enum (value);
121 break;
122 default:
123 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
124 break;
125 }
126 }
127
128 static void
gst_checksum_sink_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)129 gst_checksum_sink_get_property (GObject * object, guint prop_id,
130 GValue * value, GParamSpec * pspec)
131 {
132 GstChecksumSink *checksumsink = GST_CHECKSUM_SINK (object);
133
134 switch (prop_id) {
135 case PROP_HASH:
136 g_value_set_enum (value, checksumsink->hash);
137 break;
138 default:
139 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
140 break;
141 }
142 }
143
144 static void
gst_checksum_sink_dispose(GObject * object)145 gst_checksum_sink_dispose (GObject * object)
146 {
147 G_OBJECT_CLASS (parent_class)->dispose (object);
148 }
149
150 static void
gst_checksum_sink_finalize(GObject * object)151 gst_checksum_sink_finalize (GObject * object)
152 {
153 G_OBJECT_CLASS (parent_class)->finalize (object);
154 }
155
156 static gboolean
gst_checksum_sink_start(GstBaseSink * sink)157 gst_checksum_sink_start (GstBaseSink * sink)
158 {
159 return TRUE;
160 }
161
162 static gboolean
gst_checksum_sink_stop(GstBaseSink * sink)163 gst_checksum_sink_stop (GstBaseSink * sink)
164 {
165 return TRUE;
166 }
167
168 static GstFlowReturn
gst_checksum_sink_render(GstBaseSink * sink,GstBuffer * buffer)169 gst_checksum_sink_render (GstBaseSink * sink, GstBuffer * buffer)
170 {
171 gchar *s;
172 GstMapInfo map;
173 GstChecksumSink *checksumsink;
174
175 checksumsink = GST_CHECKSUM_SINK (sink);
176 gst_buffer_map (buffer, &map, GST_MAP_READ);
177 s = g_compute_checksum_for_data (checksumsink->hash, map.data, map.size);
178 gst_buffer_unmap (buffer, &map);
179 g_print ("%" GST_TIME_FORMAT " %s\n",
180 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)), s);
181
182 g_free (s);
183
184 return GST_FLOW_OK;
185 }
186