Implemented HEVC video demuxing and parsing

media/BUILD.gn

Index: media/BUILD.gn
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 0308bc049ceeee109209c3fff39434fecbcb7c3d..51fb153a530c861a07413ee33e73ecb25ea3b602 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -32,6 +32,9 @@ config("media_config") {
   if (use_cras) {
     defines += [ "USE_CRAS" ]
   }
+  if (proprietary_codecs && enable_hevc_demuxing) {
+    defines += [ "ENABLE_HEVC_DEMUXING" ]
+  }
 }
 
 config("media_implementation") {
@@ -327,6 +330,21 @@ component("media") {
     }
   }
 
+  if (proprietary_codecs && enable_hevc_demuxing) {
+    sources += [
+      "filters/h265_parser.cc",
+      "filters/h265_parser.h",
+      "formats/mp4/hevc.cc",
+      "formats/mp4/hevc.h",
+    ]
+    if (media_use_ffmpeg) {
+      sources += [
+        "filters/ffmpeg_h265_to_annex_b_bitstream_converter.cc",
+        "filters/ffmpeg_h265_to_annex_b_bitstream_converter.h",
+      ]
+    }
+  }
+
   if (current_cpu == "arm" && arm_use_neon) {
     defines += [ "USE_NEON" ]
   }
@@ -686,6 +704,9 @@ test("media_unittests") {
         "filters/ffmpeg_h264_to_annex_b_bitstream_converter_unittest.cc",
       ]
     }
+    if (enable_hevc_demuxing) {
+      sources += [ "filters/h265_parser_unittest.cc" ]
+    }
   }
 
   if (is_mac || is_ios) {