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3 commits

Author SHA1 Message Date
Nicolas Dufresne
bdfcf43f74 gstprection: _add_protection_meta() is transfer none
Just like gst_buffer_add_meta() this function should also be
transfer none. This also silence a gi warning about returning
a copy of a non boxed bare structure.
2015-06-13 12:26:13 -04:00
Nicolas Dufresne
a65cea7c69 gstprotection: Add missing namespace to macro
GST_PROTECTION_SYSTEM_ID_CAPS_FIELD was missing the GST_ namespace.
Add it before its too late.
2015-06-13 12:25:19 -04:00
Alex Ashley
abdafb0d64 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
2015-04-18 12:24:06 +01:00