Support (E)AC3 passthrough

chromecast/common/media/cast_media_client.cc

 // Copyright 2016 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.
 
 #include "chromecast/common/media/cast_media_client.h"
 
 #include "base/lazy_instance.h"
+#include "chromecast/media/base/media_caps.h"
 #include "chromecast/media/base/media_codec_support.h"
 #include "chromecast/public/media/media_capabilities_shlib.h"
 
 // TODO(servolk): Is there a better way to override just IsSupportedVideoConfig
 // without duplicating content::RenderMediaClient implementation?
 // For now use this to allow access to the ::media::GetMediaClient.
 namespace media {
 MEDIA_EXPORT MediaClient* GetMediaClient();
 }
 
@@ skipping 30 matching lines @@
     std::vector<std::unique_ptr<::media::KeySystemProperties>>*
         key_systems_properties) {
   content_media_client_->AddSupportedKeySystems(key_systems_properties);
 }
 
 void CastMediaClient::RecordRapporURL(const std::string& metric,
                                       const GURL& url) {
   content_media_client_->RecordRapporURL(metric, url);
 }
 
-// static
 bool CastMediaClient::IsSupportedVideoConfig(::media::VideoCodec codec,
                                              ::media::VideoCodecProfile profile,
                                              int level) {
   // TODO(servolk): For now, while the MediaCapabilitiesShlib is not mandatory
   // and might not be present, we will call the custom IsSupportedVideoConfig
   // implementation when it's present and will rely on the older approach
   // (MediaCodecSupportShlib) to block codecs not supported on platforms that
   // don't have MediaCodecSupportShlib yet. During the next OEM API change we'll
   // make MediaCodecSupportShlib mandatory and will be always able to call it.
   if (MediaCapabilitiesShlib::IsSupportedVideoConfig) {
     return MediaCapabilitiesShlib::IsSupportedVideoConfig(
         ToCastVideoCodec(codec), ToCastVideoProfile(profile), level);
   }
   LOG(WARNING) << __FUNCTION__
                << " MediaCapabilitiesShlib::IsSupportedVideoConfig not present"
                << ", returning true";
   return true;
 }
 
+bool CastMediaClient::IsSupportedPassthroughAudio(::media::AudioCodec codec) {
+  return (codec == ::media::kCodecAC3 &&
+          MediaCapabilities::HdmiSinkSupportsAC3()) ||
+         (codec == ::media::kCodecEAC3 &&
+          MediaCapabilities::HdmiSinkSupportsEAC3());
+}
+
 }  // namespace media
 }  // namespace chromecast