Introduce Dolby Vision video codec and Demuxer support

media/BUILD.gn

Index: media/BUILD.gn
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 36667dac146026189ac6689b6228db4e8a56e494..b47595cca2bccb551f1b07b84fc1ca1339f7c269 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -21,6 +21,7 @@ buildflag_header("media_features") {
     "ENABLE_AC3_EAC3_AUDIO_DEMUXING=$enable_ac3_eac3_audio_demuxing",
     "ENABLE_CBCS_ENCRYPTION_SCHEME=$enable_cbcs_encryption_scheme",
     "ENABLE_HEVC_DEMUXING=$enable_hevc_demuxing",
+    "ENABLE_DOLBY_VISION_DEMUXING=$enable_dolby_vision_demuxing",
     "ENABLE_HLS_SAMPLE_AES=$enable_hls_sample_aes",
     "ENABLE_MSE_MPEG2TS_STREAM_PARSER=$enable_mse_mpeg2ts_stream_parser",
     "ENABLE_RUNTIME_MEDIA_RENDERER_SELECTION=$enable_runtime_media_renderer_selection",
@@ -350,6 +351,12 @@ component("media") {
       ]
     }
   }
+  if (proprietary_codecs && enable_dolby_vision_demuxing) {
+    sources += [
+      "formats/mp4/dolby_vision.cc",
+      "formats/mp4/dolby_vision.h",
+    ]
+  }
 
   if (current_cpu == "arm" && arm_use_neon) {
     defines += [ "USE_NEON" ]
@@ -704,6 +711,9 @@ source_set("unit_tests") {
     if (enable_hls_sample_aes) {
       deps += [ "//third_party/boringssl" ]
     }
+    if (enable_dolby_vision_demuxing) {
+      sources += [ "formats/mp4/dolby_vision_unittest.cc" ]
+    }
   }
 
   if (is_mac || is_ios) {