Reducing the IPC latency for MSE video decoding

media/base/android/media_source_player.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_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_
 #define MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_
 
 #include <jni.h>
 #include <map>
 #include <string>
@@ skipping 84 matching lines @@
 
   // Callback to notify that MediaCrypto is ready in |drm_bridge_|.
   void OnMediaCryptoReady();
 
   // Handle pending events if all the decoder jobs are not currently decoding.
   void ProcessPendingEvents();
 
   // Helper method to clear any pending |SURFACE_CHANGE_EVENT_PENDING|
   // and reset |video_decoder_job_| to null.
   void ResetVideoDecoderJob();
+  void ResetAudioDecoderJob();
 
   // Helper methods to configure the decoder jobs.
   void ConfigureVideoDecoderJob();
   void ConfigureAudioDecoderJob();
 
   // Flush the decoders and clean up all the data needs to be decoded.
   void ClearDecodingData();
 
   // Called to decode more data.
   void DecodeMoreAudio();
@@ skipping 160 matching lines @@
   // the player should pause. When a new key is added (OnKeyAdded()), we should
   // try to start playback again.
   bool is_waiting_for_key_;
 
   // Test-only callback for hooking the completion of the next decode cycle.
   base::Closure decode_callback_for_testing_;
 
   // Whether |surface_| is currently used by the player.
   bool is_surface_in_use_;
 
+  // Whether there are pending data requests by the decoder.
+  bool has_pending_audio_data_request_;
+  bool has_pending_video_data_request_;
+
   friend class MediaSourcePlayerTest;
   DISALLOW_COPY_AND_ASSIGN(MediaSourcePlayer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_SOURCE_PLAYER_H_