[Bug 761700] New: basedrm: a base class based on CENC common encryption scheme for DRM playback

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=761700

            Bug ID: 761700
           Summary: basedrm: a base class based on CENC common encryption
                    scheme for DRM playback
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: sharma.rajesh at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 320610
  --> https://bugzilla.gnome.org/attachment.cgi?id=320610&action=edit
basedrm patch

short_description: Base class for DRM using ISOBMFF CENC common encryption and
'piff' (PSSH box)
Common encryption (CENC) in ISO base media file format files (ISOBMFF)  ISO/IEC
23001-7 standard
Common encryption (CENC) of MPEG-2 transport streams (MPEG-2 TS)        ISO/IEC
23001-9 standard

This basedrm class does license management and other common activities to
enable DRM management systems to decrypt the encrypted audio / video samples. 

The subclass is responsible for providing pad template caps for 
source and sink pads. The pads need to be named "sink" and "src".
DRM subsystem should do in place decryption so that input and output buffer are
same.
gstbasedrm class will not implement any default methods therefore all necessary
methods required for DRM management should be implemented by derived class.

We have developed and tested this plugin in STMicroelectronics for DRM playback
on our HW platform. This class has been tested on STB platform using latest
gstreamer baseline for DASH / MSS and HLS streaming playback of PlayReady
protected data. gstreamer patches for CENC support in gstreamer for MSS and HLS
(in mpegts ) have been developed in ST for CENC encrypted PlayReady streams.

This BaseDRM class has also been tested using clear key DRM in native gstreamer
with CENC encrypted DASH streams with clearkey mechanism.

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