MP4 support for Common Encryption 'cbcs' scheme.

media/media_options.gni

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/chromecast_build.gni")
 import("//build/config/features.gni")
 
 declare_args() {
   # Allows distributions to link pulseaudio directly (DT_NEEDED) instead of
   # using dlopen. This helps with automated detection of ABI mismatches and
@@ skipping 21 matching lines @@
   # Use low-memory buffers on non-Android builds of Chromecast.
   use_low_memory_buffer = is_chromecast && !is_android
 
   # Enables AC3/EAC3 audio demuxing. This is enabled only on Chromecast, since
   # it only provides demuxing, and is only useful for AC3/EAC3 audio
   # pass-through to HDMI sink on Chromecast.
   enable_ac3_eac3_audio_demuxing = proprietary_codecs && is_chromecast
 
   enable_mse_mpeg2ts_stream_parser = proprietary_codecs && is_chromecast
 
+  # Enable support for the 'cbcs' encryption scheme added by MPEG Common
+  # Encryption 3rd Edition (ISO/IEC 23001-7), published 02/15/2016.
+  enable_cbcs_encryption_scheme = is_chromecast
+
   # Enable HEVC/H265 demuxing. Actual decoding must be provided by the
   # platform. Enable by default for Chromecast.
   enable_hevc_demuxing = proprietary_codecs && is_chromecast
 
   # TODO(GYP): This should be a platform define.
   is_openbsd = false
 }
 
 # Use a second declare_args() to pick up possible overrides of |use_cras|.
 declare_args() {
@@ skipping 63 matching lines @@
         "cdm",
         "renderer",
       ]
       mojo_media_host = "browser"
     } else {
       mojo_media_services = [ "cdm" ]
       mojo_media_host = "utility"
     }
   }
 }