Introduce Dolby Vision video codec and Demuxer support

chromecast/media/base/media_codec_support.h

 // Copyright 2015 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.
 
 #ifndef CHROMECAST_MEDIA_BASE_MEDIA_CODEC_SUPPORT_H_
 #define CHROMECAST_MEDIA_BASE_MEDIA_CODEC_SUPPORT_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "chromecast/public/media/decoder_config.h"
 #include "media/base/mime_util.h"
 #include "media/base/video_codecs.h"
 
 // TODO(slan|servolk): remove when this definition exists in //media.
 namespace media {
 typedef base::Callback<bool(const std::string&)> IsCodecSupportedCB;
 }
 
 namespace chromecast {
 namespace media {
 
 // Returns the callback to decide whether a given codec (passed in as a string
 // representation of the codec id conforming to RFC 6381) is supported or not.
 ::media::IsCodecSupportedCB GetIsCodecSupportedOnChromecastCB();
 
-VideoCodec ToCastVideoCodec(const ::media::VideoCodec codec);
+// Converts ::media::VideoCodec to chromecast::media::VideoCodec. Any unknown or
+// unsupported codec will be converted to chromecast::media::kCodecUnknown. Note
+// |codec_profile| is ignored for codecs other than Dolby Vision.
+// TODO(erickung): Removes |codec_profile| parameter by changing VideoCodec enum

[wolenetz, 2017/02/18 00:01:02]

nit: s/Removes/Remove/

[erickung1, 2017/02/27 17:33:10]

Done.

+// to align with ::media::VideoCodecs.
+VideoCodec ToCastVideoCodec(const ::media::VideoCodec codec,
+                            const ::media::VideoCodecProfile codec_profile);
+
+// Converts ::media::VideoCodecProfile to chromecast::media::VideoProfile.
 VideoProfile ToCastVideoProfile(const ::media::VideoCodecProfile profile);
 CodecProfileLevel ToCastCodecProfileLevel(
     const ::media::CodecProfileLevel& codec_profile_level);
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_BASE_MEDIA_CODEC_SUPPORT_H_