[Chromecast] Introduce a MediaCapabilitiesShlib::IsSupportedAudioConfig

chromecast/media/cma/backend/alsa/media_codec_support_cast_audio.cc

 // 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.
 
 #include "base/strings/string_util.h"
 #include "chromecast/public/media/media_capabilities_shlib.h"
 #include "chromecast/public/media_codec_support_shlib.h"
 
 namespace chromecast {
 namespace media {
@@ skipping 22 matching lines @@
 
   return kNotSupported;
 }
 
 bool MediaCapabilitiesShlib::IsSupportedVideoConfig(VideoCodec codec,
                                                     VideoProfile profile,
                                                     int level) {
   return (codec == kCodecH264 || codec == kCodecVP8 || codec == kCodecVP9);
 }
 
+bool MediaCapabilitiesShlib::IsSupportedAudioConfig(const AudioConfig& config) {
+  return config.codec == kCodecAAC || config.codec == kCodecMP3 ||
+         config.codec == kCodecPCM;
+}
+
 }  // namespace media
 }  // namespace chromecast