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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
#include <gst/base/gstbasetransform.h>
typedef struct
{
GstPad *srcpad;
GstPad *sinkpad;
GList *events;
GList *buffers;
GstElement *trans;
GstBaseTransformClass *klass;
} TestTransData;
static GstStaticPadTemplate gst_test_trans_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("foo/x-bar")
);
static GstStaticPadTemplate gst_test_trans_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("foo/x-bar")
);
typedef struct _GstTestTrans GstTestTrans;
typedef struct _GstTestTransClass GstTestTransClass;
#define GST_TYPE_TEST_TRANS \
(gst_test_trans_get_type())
#define GST_TEST_TRANS(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TEST_TRANS,GstTestTrans))
#define GST_TEST_TRANS_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_TEST_TRANS,GstTestTransClass))
#define GST_TEST_TRANS_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj), GST_TYPE_TEST_TRANS, GstTestTransClass))
#define GST_IS_TEST_TRANS(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TEST_TRANS))
#define GST_IS_TEST_TRANS_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_TEST_TRANS))
struct _GstTestTrans
{
GstBaseTransform element;
TestTransData *data;
};
struct _GstTestTransClass
{
GstBaseTransformClass parent_class;
};
GType gst_test_trans_get_type (void);
G_DEFINE_TYPE (GstTestTrans, gst_test_trans, GST_TYPE_BASE_TRANSFORM);
static GstFlowReturn (*klass_transform) (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer * outbuf) = NULL;
static GstFlowReturn (*klass_transform_ip) (GstBaseTransform * trans,
GstBuffer * buf) = NULL;
static gboolean (*klass_set_caps) (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps) = NULL;
static GstCaps *(*klass_transform_caps) (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter) = NULL;
static gboolean (*klass_transform_size) (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, gsize size, GstCaps * othercaps,
gsize * othersize) = NULL;
static gboolean klass_passthrough_on_same_caps = FALSE;
static GstStaticPadTemplate *sink_template = &gst_test_trans_sink_template;
static GstStaticPadTemplate *src_template = &gst_test_trans_src_template;
static void
gst_test_trans_class_init (GstTestTransClass * klass)
{
GstElementClass *element_class;
GstBaseTransformClass *trans_class;
element_class = (GstElementClass *) klass;
trans_class = (GstBaseTransformClass *) klass;
gst_element_class_set_details_simple (element_class, "TestTrans",
"Filter/Test", "Test transform", "Wim Taymans <wim.taymans@gmail.com>");
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (src_template));
trans_class->passthrough_on_same_caps = klass_passthrough_on_same_caps;
if (klass_transform_ip != NULL)
trans_class->transform_ip = klass_transform_ip;
if (klass_transform != NULL)
trans_class->transform = klass_transform;
if (klass_transform_caps != NULL)
trans_class->transform_caps = klass_transform_caps;
if (klass_transform_size != NULL)
trans_class->transform_size = klass_transform_size;
if (klass_set_caps != NULL)
trans_class->set_caps = klass_set_caps;
}
static void
gst_test_trans_init (GstTestTrans * this)
{
}
static void
gst_test_trans_set_data (GstTestTrans * this, TestTransData * data)
{
this->data = data;
}
static GstFlowReturn
result_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
TestTransData *data;
data = gst_pad_get_element_private (pad);
data->buffers = g_list_append (data->buffers, buffer);
return GST_FLOW_OK;
}
#if 0
static GstFlowReturn
result_buffer_alloc (GstPad * pad, guint64 offset, guint size, GstCaps * caps,
GstBuffer ** buf)
{
GstFlowReturn res;
TestTransData *data;
data = gst_pad_get_element_private (pad);
*buf = gst_buffer_new_and_alloc (size);
gst_buffer_set_caps (*buf, caps);
res = GST_FLOW_OK;
return res;
}
#endif
static TestTransData *
gst_test_trans_new (void)
{
TestTransData *res;
GstPad *tmp;
GstPadTemplate *templ;
res = g_new0 (TestTransData, 1);
res->trans = g_object_new (GST_TYPE_TEST_TRANS, NULL);
templ = gst_static_pad_template_get (sink_template);
templ->direction = GST_PAD_SRC;
res->srcpad = gst_pad_new_from_template (templ, "src");
gst_object_unref (templ);
templ = gst_static_pad_template_get (src_template);
templ->direction = GST_PAD_SINK;
res->sinkpad = gst_pad_new_from_template (templ, "sink");
gst_object_unref (templ);
res->klass = GST_BASE_TRANSFORM_GET_CLASS (res->trans);
gst_test_trans_set_data (GST_TEST_TRANS (res->trans), res);
gst_pad_set_element_private (res->sinkpad, res);
gst_pad_set_chain_function (res->sinkpad, result_sink_chain);
tmp = gst_element_get_static_pad (res->trans, "sink");
gst_pad_link (res->srcpad, tmp);
gst_object_unref (tmp);
tmp = gst_element_get_static_pad (res->trans, "src");
gst_pad_link (tmp, res->sinkpad);
gst_object_unref (tmp);
gst_pad_set_active (res->sinkpad, TRUE);
gst_element_set_state (res->trans, GST_STATE_PAUSED);
gst_pad_set_active (res->srcpad, TRUE);
return res;
}
static void
gst_test_trans_free (TestTransData * data)
{
GstPad *tmp;
gst_pad_set_active (data->sinkpad, FALSE);
gst_element_set_state (data->trans, GST_STATE_NULL);
gst_pad_set_active (data->srcpad, FALSE);
tmp = gst_element_get_static_pad (data->trans, "src");
gst_pad_unlink (tmp, data->sinkpad);
gst_object_unref (tmp);
tmp = gst_element_get_static_pad (data->trans, "sink");
gst_pad_link (data->srcpad, tmp);
gst_object_unref (tmp);
gst_object_unref (data->srcpad);
gst_object_unref (data->sinkpad);
gst_object_unref (data->trans);
g_free (data);
}
static GstFlowReturn
gst_test_trans_push (TestTransData * data, GstBuffer * buffer)
{
GstFlowReturn ret;
ret = gst_pad_push (data->srcpad, buffer);
return ret;
}
static GstBuffer *
gst_test_trans_pop (TestTransData * data)
{
GstBuffer *ret;
if (data->buffers) {
ret = data->buffers->data;
data->buffers = g_list_delete_link (data->buffers, data->buffers);
} else {
ret = NULL;
}
return ret;
}
|
