Introduce Dolby Vision video codec and Demuxer support

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")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
 declare_args() {
   # Allows distributions to link pulseaudio directly (DT_NEEDED) instead of
@@ skipping 31 matching lines @@
       (proprietary_codecs && is_chromecast) || use_libfuzzer || use_afl
 
   # 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
 
+  # Enable Dolby Vision demuxing. Enable by default for Chromecast. Actual
+  # decoding must be provided by the platform. Note some Dolby Vision profiles
+  # which are encoded using HEVC require |enable_hevc_demuxing| to be enabled.
+  enable_dolby_vision_demuxing =
+      proprietary_codecs && is_chromecast && !is_android
+
   enable_webrtc = !is_ios && !is_cast_audio_only
 
   # Enable HLS with SAMPLE-AES decryption.
   # Enabled by default on the cast desktop implementation to allow unit tests of
   # MP2TS parsing support.
   enable_hls_sample_aes = proprietary_codecs && is_cast_desktop_build
 }
 
 # enable_hls_sample_aes can only be true if enable_mse_mpeg2ts_stream_parser is.
 assert(enable_mse_mpeg2ts_stream_parser || !enable_hls_sample_aes)
@@ skipping 100 matching lines @@
     }
   }
 }
 
 declare_args() {
   # This switch defines whether the Media Remoting implementation will be built.
   # When enabled, media is allowed to be renderer and played back on remote
   # devices when the tab is being casted and other conditions are met.
   enable_media_remoting = !is_chromecast && !is_ios && !is_android
 }