mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-21 07:46:38 +00:00
abdafb0d64
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
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/* GStreamer
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef __GST_PROTECTION_H__
|
|
#define __GST_PROTECTION_H__
|
|
|
|
#include <gst/gst.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/* @PROTECTION_SYSTEM_ID_CAPS_FIELD: The field name in a GstCaps that is
|
|
* used to signal the UUID of the protection system
|
|
*/
|
|
#define PROTECTION_SYSTEM_ID_CAPS_FIELD "protection-system"
|
|
|
|
typedef struct _GstProtectionMeta GstProtectionMeta;
|
|
/**
|
|
* GstProtectionMeta:
|
|
* @meta: the parent #GstMeta.
|
|
* @info: the cryptographic information needed to decrypt the sample.
|
|
*
|
|
* Metadata type that holds information about a sample from a protection-protected
|
|
* track, including the information needed to decrypt it (if it is encrypted).
|
|
*/
|
|
struct _GstProtectionMeta
|
|
{
|
|
GstMeta meta;
|
|
|
|
GstStructure *info;
|
|
};
|
|
|
|
GType gst_protection_meta_api_get_type (void);
|
|
#define GST_PROTECTION_META_API_TYPE (gst_protection_meta_api_get_type())
|
|
|
|
#define gst_buffer_get_protection_meta(b) \
|
|
((GstProtectionMeta*)gst_buffer_get_meta ((b), GST_PROTECTION_META_API_TYPE))
|
|
|
|
#define GST_PROTECTION_META_INFO (gst_protection_meta_get_info())
|
|
|
|
const GstMetaInfo *gst_protection_meta_get_info (void);
|
|
|
|
GstProtectionMeta *gst_buffer_add_protection_meta (GstBuffer * buffer,
|
|
GstStructure * info);
|
|
|
|
const gchar *gst_protection_select_system (const gchar ** system_identifiers);
|
|
|
|
G_END_DECLS
|
|
#endif /* __GST_PROTECTION_META_H__ */
|