gstreamer/tests/check/libs/test_transform.c

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#include <gst/base/gstbasetransform.h>
typedef struct
{
GstPad *srcpad;
GstPad *sinkpad;
GList *events;
GList *buffers;
GstElement *trans;
GstBaseTransformClass *klass;
GstPadBufferAllocFunction buffer_alloc;
} 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);
GST_BOILERPLATE (GstTestTrans, gst_test_trans, GstBaseTransform,
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) = NULL;
static gboolean (*klass_transform_size) (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, guint size, GstCaps * othercaps,
guint * 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_base_init (gpointer g_class)
{
GstElementClass *element_class;
element_class = GST_ELEMENT_CLASS (g_class);
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));
}
static void
gst_test_trans_class_init (GstTestTransClass * klass)
{
GstBaseTransformClass *trans_class;
trans_class = (GstBaseTransformClass *) klass;
trans_class->passthrough_on_same_caps = klass_passthrough_on_same_caps;
trans_class->transform_ip = klass_transform_ip;
trans_class->transform = klass_transform;
trans_class->transform_caps = klass_transform_caps;
trans_class->transform_size = klass_transform_size;
trans_class->set_caps = klass_set_caps;
}
static void
gst_test_trans_init (GstTestTrans * this, GstTestTransClass * g_class)
{
}
static void
gst_test_trans_set_data (GstTestTrans * this, TestTransData * data)
{
this->data = data;
}
static GstFlowReturn
result_sink_chain (GstPad * pad, GstBuffer * buffer)
{
TestTransData *data;
data = gst_pad_get_element_private (pad);
data->buffers = g_list_append (data->buffers, buffer);
return GST_FLOW_OK;
}
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);
if (data->buffer_alloc) {
res = data->buffer_alloc (pad, offset, size, caps, buf);
} else {
*buf = gst_buffer_new_and_alloc (size);
gst_buffer_set_caps (*buf, caps);
res = GST_FLOW_OK;
}
return res;
}
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_bufferalloc_function (res->sinkpad, result_buffer_alloc);
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;
}