gstreamer/tests/check/gst/gstprotection.c

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protection: add GstProtectionMeta to support protected content In order to support some types of protected streams (such as those protected using DASH Common Encryption) some per-buffer information needs to be passed between elements. This commit adds a GstMeta type called GstProtectionMeta that allows protection specific information to be added to a GstBuffer. An example of its usage is qtdemux providing information to each output sample that enables a downstream element to decrypt it. This commit adds a utility function to select a supported protection system from the installed Decryption elements found in the registry. The gst_protection_select_system function that takes an array of identifiers and searches the registry for a element of klass Decryptor that supports one or more of the supplied identifiers. If multiple elements are found, the one with the highest rank is selected. This commit adds a unit test for the gst_protection_select_system function that adds a fake Decryptor element to the registry and then checks that it can correctly be selected by the utility function. This commit adds a unit test for GstProtectionMeta that creates GstProtectionMeta and adds & removes it from a buffer and performs some simple reference count checks. API: gst_buffer_add_protection_meta() API: gst_buffer_get_protection_meta() API: gst_protection_select_system() API: gst_protection_meta_api_get_type() API: gst_protection_meta_get_info() https://bugzilla.gnome.org/show_bug.cgi?id=705991
2015-04-15 14:33:31 +00:00
/* GStreamer
*
* Unit tests for protection library.
*
* Copyright (C) <2015> YouView TV Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <gst/check/gstcheck.h>
#include <gst/gstprotection.h>
#ifndef GST_PACKAGE_NAME
#define GST_PACKAGE_NAME "gstreamer"
#endif
#ifndef GST_PACKAGE_ORIGIN
#define GST_PACKAGE_ORIGIN "https://developer.gnome.org/gstreamer/"
#endif
static GType gst_protection_test_get_type (void);
#define GST_TYPE_PROTECTION_TEST (gst_protection_test_get_type ())
#define GST_PROTECTION_TEST(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PROTECTION_TEST, GstProtectionTest))
#define GST_PROTECTION_TEST_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PROTECTION_TEST, GstProtectionTestClass))
#define GST_IS_PROTECTION_TEST(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PROTECTION_TEST))
#define GST_IS_PROTECTION_TEST_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PROTECTION_TEST))
#define GST_PROTECTION_TEST_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_PROTECTION_TEST, GstProtectionTestClass))
#define GST_PROTECTION_TEST_NAME "protection-test"
#define CLEARKEY_SYSTEM_ID "78f32170-d883-11e0-9572-0800200c9a66"
typedef struct _GstProtectionTest
{
GstElement parent;
gint test;
} GstProtectionTest;
typedef struct _GstProtectionTestClass
{
GstElementClass parent_class;
} GstProtectionTestClass;
typedef struct _PluginInitContext
{
const gchar *name;
guint rank;
GType type;
} PluginInitContext;
static GstStaticPadTemplate gst_decrypt_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS
("application/x-cenc, original-media-type=(string)video/x-h264, "
PROTECTION_SYSTEM_ID_CAPS_FIELD "=(string)" CLEARKEY_SYSTEM_ID)
);
static void
gst_protection_test_class_init (GObjectClass * klass)
{
}
static void
gst_protection_test_base_init (GstProtectionTestClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_decrypt_sink_template));
gst_element_class_set_metadata (element_class,
"Decryptor element for unit tests",
GST_ELEMENT_FACTORY_KLASS_DECRYPTOR,
"Use in unit tests", "Alex Ashley <alex.ashley@youview.com>");
}
static GType
gst_protection_test_get_type (void)
{
static volatile gsize protection_test_type = 0;
if (g_once_init_enter (&protection_test_type)) {
GType type;
const GTypeInfo info = {
sizeof (GstProtectionTestClass),
(GBaseInitFunc) gst_protection_test_base_init, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gst_protection_test_class_init, /* class_init */
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GstProtectionTest),
0, /* n_preallocs */
NULL, /* instance_init */
NULL /* value_table */
};
type =
g_type_register_static (GST_TYPE_ELEMENT, "GstProtectionTest", &info,
0);
g_once_init_leave (&protection_test_type, type);
}
return protection_test_type;
}
static gboolean
protection_plugin_init_func (GstPlugin * plugin, gpointer user_data)
{
PluginInitContext *context = (PluginInitContext *) user_data;
gboolean ret;
ret =
gst_element_register (plugin, context->name, context->rank,
context->type);
return ret;
}
static gboolean
protection_create_plugin (GstRegistry * registry, const gchar * name,
GType type)
{
gboolean ret;
PluginInitContext context;
context.name = name;
context.rank = GST_RANK_MARGINAL;
context.type = type;
ret = gst_plugin_register_static_full (GST_VERSION_MAJOR, /* version */
GST_VERSION_MINOR, /* version */
name, /* name */
"Protection unit test", /* description */
protection_plugin_init_func, /* init function */
"0.0.0", /* version string */
GST_LICENSE_UNKNOWN, /* license */
__FILE__, /* source */
GST_PACKAGE_NAME, /* package */
GST_PACKAGE_ORIGIN, /* origin */
&context /* user_data */
);
return ret;
}
static void
test_setup (void)
{
GstRegistry *registry;
registry = gst_registry_get ();
protection_create_plugin (registry, GST_PROTECTION_TEST_NAME,
GST_TYPE_PROTECTION_TEST);
}
static void
test_teardown (void)
{
}
GST_START_TEST (test_decryptor_element_class)
{
GstElement *elem;
const gchar *selected_id;
const gchar *sys_ids[] = {
CLEARKEY_SYSTEM_ID,
"69f908af-4816-46ea-910c-cd5dcccb0a3a",
"5e629af5-38da-4063-8977-97ffbd9902d4",
NULL
};
#ifdef DEBUG_PLUGINS
GList *list, *walk;
list = gst_registry_get_plugin_list (gst_registry_get ());
for (walk = list; walk; walk = g_list_next (walk)) {
GstPlugin *plugin = (GstPlugin *) walk->data;
g_print ("Element %s\n", gst_plugin_get_name (plugin));
}
#endif
elem = gst_element_factory_make (GST_PROTECTION_TEST_NAME, NULL);
fail_unless (GST_IS_ELEMENT (elem));
selected_id = gst_protection_select_system (sys_ids);
fail_if (selected_id == NULL);
selected_id = gst_protection_select_system (&sys_ids[1]);
fail_unless (selected_id == NULL);
selected_id = gst_protection_select_system (&sys_ids[3]);
fail_unless (selected_id == NULL);
}
GST_END_TEST;
GST_START_TEST (test_protection_metadata)
{
GstBuffer *buf = NULL;
GstBuffer *iv, *kid;
GstBuffer *fetched_iv = NULL, *fetched_key_id = NULL;
GstStructure *meta_info;
GstProtectionMeta *meta = NULL;
const GstMetaInfo *info = NULL;
const GValue *value;
/* Check correct type info is returned */
info = gst_protection_meta_get_info ();
fail_unless (info != NULL);
fail_unless (info->api == GST_PROTECTION_META_API_TYPE);
iv = gst_buffer_new_allocate (NULL, 16, NULL);
gst_buffer_memset (iv, 0, 'i', 16);
ASSERT_MINI_OBJECT_REFCOUNT (iv, "iv", 1);
kid = gst_buffer_new_allocate (NULL, 16, NULL);
gst_buffer_memset (kid, 0, 'k', 16);
ASSERT_MINI_OBJECT_REFCOUNT (kid, "kid", 1);
meta_info = gst_structure_new ("application/x-cenc",
"encrypted", G_TYPE_BOOLEAN, TRUE,
"iv", GST_TYPE_BUFFER, iv,
"iv_size", G_TYPE_UINT, 16, "kid", GST_TYPE_BUFFER, kid, NULL);
ASSERT_MINI_OBJECT_REFCOUNT (kid, "kid", 2);
ASSERT_MINI_OBJECT_REFCOUNT (iv, "iv", 2);
buf = gst_buffer_new_allocate (NULL, 1024, NULL);
/* Test attaching protection metadata to buffer */
meta = gst_buffer_add_protection_meta (buf, meta_info);
fail_unless (meta != NULL);
/* gst_buffer_new_allocate takes ownership of info GstStructure */
ASSERT_MINI_OBJECT_REFCOUNT (buf, "Buffer", 1);
/* Test detaching protection metadata from buffer, and check that
* contained data is correct */
meta = NULL;
meta = gst_buffer_get_protection_meta (buf);
fail_unless (meta != NULL);
ASSERT_MINI_OBJECT_REFCOUNT (buf, "Buffer", 1);
value = gst_structure_get_value (meta->info, "iv");
fail_unless (value != NULL);
fetched_iv = gst_value_get_buffer (value);
fail_unless (fetched_iv != NULL);
fail_unless (gst_buffer_get_size (fetched_iv) == 16);
value = gst_structure_get_value (meta->info, "kid");
fail_unless (value != NULL);
fetched_key_id = gst_value_get_buffer (value);
fail_unless (fetched_key_id != NULL);
fail_unless (gst_buffer_get_size (fetched_key_id) == 16);
gst_buffer_remove_meta (buf, (GstMeta *) meta);
/* Check that refcounts are decremented after metadata is freed */
ASSERT_MINI_OBJECT_REFCOUNT (buf, "Buffer", 1);
ASSERT_MINI_OBJECT_REFCOUNT (iv, "IV", 1);
ASSERT_MINI_OBJECT_REFCOUNT (kid, "KID", 1);
gst_buffer_unref (buf);
gst_buffer_unref (iv);
gst_buffer_unref (kid);
}
GST_END_TEST;
static Suite *
protection_suite (void)
{
Suite *s = suite_create ("protection library");
TCase *tc_chain = tcase_create ("general");
suite_add_tcase (s, tc_chain);
tcase_add_test (tc_chain, test_decryptor_element_class);
tcase_add_test (tc_chain, test_protection_metadata);
tcase_add_unchecked_fixture (tc_chain, test_setup, test_teardown);
return s;
}
int
main (int argc, char **argv)
{
int nf;
Suite *s = protection_suite ();
SRunner *sr = srunner_create (s);
gst_check_init (&argc, &argv);
srunner_run_all (sr, CK_NORMAL);
nf = srunner_ntests_failed (sr);
srunner_free (sr);
return nf;
}