media: AVDA now doesn't queue EOS for a flush if the codec is empty

media/gpu/android_video_decode_accelerator.h

 // Copyright (c) 2013 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 MEDIA_GPU_ANDROID_VIDEO_DECODE_ACCELERATOR_H_
 #define MEDIA_GPU_ANDROID_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 76 matching lines @@
     // to NO_ERROR or ERROR depending on success.
     WAITING_FOR_CODEC,
     // Set when we have a codec, but it doesn't yet have a key.
     WAITING_FOR_KEY,
     // The output surface was destroyed. We must not configure a new MediaCodec
     // with the destroyed surface.
     SURFACE_DESTROYED,
   };
 
   enum DrainType {
-    DRAIN_TYPE_NONE,
     DRAIN_FOR_FLUSH,
     DRAIN_FOR_RESET,
     DRAIN_FOR_DESTROY,
   };
 
   // Initialize of the picture buffer manager.  This is to be called when the
   // SurfaceView in |surface_id_|, if any, is no longer busy.  It will return
   // false on failure, and true if initialization was successful.  This includes
   // synchronous and asynchronous init; the AVDA might not yet have a codec on
   // success, but async init will at least be in progress.
@@ skipping 167 matching lines @@
 
   // Keeps track of bitstream ids notified to the client with
   // NotifyEndOfBitstreamBuffer() before getting output from the bitstream.
   std::list<int32_t> bitstreams_notified_in_advance_;
 
   AVDAPictureBufferManager picture_buffer_manager_;
 
   // Time at which we last did useful work on io_timer_.
   base::TimeTicks most_recent_work_;
 
-  // Type of a drain request. We need to distinguish between DRAIN_FOR_FLUSH
-  // and other types, see IsDrainingForResetOrDestroy().
-  DrainType drain_type_;
+  // The ongoing drain operation, if any.
+  base::Optional<DrainType> drain_type_;
 
   // Holds a ref-count to the CDM to avoid using the CDM after it's destroyed.
   scoped_refptr<MediaKeys> cdm_for_reference_holding_only_;
 
   MediaDrmBridgeCdmContext* media_drm_bridge_cdm_context_;
 
   // MediaDrmBridge requires registration/unregistration of the player, this
   // registration id is used for this.
   int cdm_registration_id_;
 
@@ skipping 32 matching lines @@
 
   // WeakPtrFactory for posting tasks back to |this|.
   base::WeakPtrFactory<AndroidVideoDecodeAccelerator> weak_this_factory_;
 
   friend class AndroidVideoDecodeAcceleratorTest;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_ANDROID_VIDEO_DECODE_ACCELERATOR_H_