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Member "gstreamer-1.16.1/gst/gstprotection.h" (19 Apr 2019, 3073 Bytes) of package /linux/misc/gstreamer-1.16.1.tar.xz:


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    1 /* GStreamer
    2  * Copyright (C) <2015> YouView TV Ltd.
    3  *
    4  * This library is free software; you can redistribute it and/or
    5  * modify it under the terms of the GNU Library General Public
    6  * License as published by the Free Software Foundation; either
    7  * version 2 of the License, or (at your option) any later version.
    8  *
    9  * This library is distributed in the hope that it will be useful,
   10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   12  * Library General Public License for more details.
   13  *
   14  * You should have received a copy of the GNU Library General Public
   15  * License along with this library; if not, write to the
   16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   17  * Boston, MA 02110-1301, USA.
   18  */
   19 
   20 #ifndef __GST_PROTECTION_H__
   21 #define __GST_PROTECTION_H__
   22 
   23 #include <gst/gst.h>
   24 
   25 G_BEGIN_DECLS
   26 
   27 /**
   28  * GST_PROTECTION_SYSTEM_ID_CAPS_FIELD:
   29  *
   30  * The field name in a GstCaps that is used to signal the UUID of the protection
   31  * system.
   32  *
   33  * Since: 1.6
   34  */
   35 #define GST_PROTECTION_SYSTEM_ID_CAPS_FIELD "protection-system"
   36 
   37 /**
   38  * GST_PROTECTION_UNSPECIFIED_SYSTEM_ID:
   39  *
   40  * The protection system value of the unspecified UUID.
   41  * In some cases the system protection ID is not present in the contents or in their
   42  * metadata, as encrypted WebM.
   43  * This define is used to set the value of the "system_id" field in GstProtectionEvent,
   44  * with this value, the application will use an external information to choose which
   45  * protection system to use.
   46  *
   47  * Example: The matroskademux uses this value in the case of encrypted WebM,
   48  * the application will choose the appropriate protection system based on the information
   49  * received through EME API.
   50  *
   51  * Since: 1.16
   52  */
   53 #define GST_PROTECTION_UNSPECIFIED_SYSTEM_ID "unspecified-system-id"
   54 
   55 typedef struct _GstProtectionMeta GstProtectionMeta;
   56 /**
   57  * GstProtectionMeta:
   58  * @meta: the parent #GstMeta.
   59  * @info: the cryptographic information needed to decrypt the sample.
   60  *
   61  * Metadata type that holds information about a sample from a protection-protected
   62  * track, including the information needed to decrypt it (if it is encrypted).
   63  *
   64  * Since: 1.6
   65  */
   66 struct _GstProtectionMeta
   67 {
   68   GstMeta meta;
   69 
   70   GstStructure *info;
   71 };
   72 
   73 GST_API
   74 GType gst_protection_meta_api_get_type (void);
   75 
   76 #define GST_PROTECTION_META_API_TYPE (gst_protection_meta_api_get_type())
   77 
   78 #define gst_buffer_get_protection_meta(b) \
   79     ((GstProtectionMeta*)gst_buffer_get_meta ((b), GST_PROTECTION_META_API_TYPE))
   80 
   81 #define GST_PROTECTION_META_INFO (gst_protection_meta_get_info())
   82 
   83 GST_API
   84 const GstMetaInfo * gst_protection_meta_get_info (void);
   85 
   86 GST_API
   87 GstProtectionMeta * gst_buffer_add_protection_meta (GstBuffer * buffer,
   88                                                     GstStructure * info);
   89 GST_API
   90 const gchar * gst_protection_select_system (const gchar ** system_identifiers);
   91 
   92 GST_API
   93 gchar ** gst_protection_filter_systems_by_available_decryptors (
   94     const gchar ** system_identifiers);
   95 
   96 G_END_DECLS
   97 #endif /* __GST_PROTECTION_META_H__ */