[Chromecast] Limit number of concurrent audio and video decoders

chromecast/media/cma/backend/media_pipeline_backend_wrapper.h

 // 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.
 
 #ifndef CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_BACKEND_WRAPPER_H_
 #define CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_BACKEND_WRAPPER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 31 matching lines @@
 
   int GetStreamType() const;
   void SetStreamTypeVolume(float stream_type_volume);
 
  private:
   std::unique_ptr<MediaPipelineBackend> backend_;
   const int stream_type_;
   std::unique_ptr<AudioDecoderWrapper> audio_decoder_wrapper_;
   float stream_type_volume_;
   bool is_initialized_;
+  bool have_video_decoder_;
   MediaPipelineBackendManager* const backend_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaPipelineBackendWrapper);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_BACKEND_MEDIA_PIPELINE_BACKEND_WRAPPER_H_