OpenSL ES stability improvements

webrtc/modules/audio_device/android/opensles_player.h

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 34 matching lines @@
 // garbage collection pauses and it supports reduced audio output latency.
 // If the device doesn't claim this feature but supports API level 9 (Android
 // platform version 2.3) or later, then we can still use the OpenSL ES APIs but
 // the output latency may be higher.
 class OpenSLESPlayer {
  public:
   // The lower output latency path is used only if the application requests a
   // buffer count of 2 or more, and a buffer size and sample rate that are
   // compatible with the device's native output configuration provided via the
   // audio manager at construction.
-  static const int kNumOfOpenSLESBuffers = 2;
+  static const int kNumOfOpenSLESBuffers = 4;
 
   // There is no need for this class to use JNI.
   static int32_t SetAndroidAudioDeviceObjects(void* javaVM, void* context) {
     return 0;
   }
   static void ClearAndroidAudioDeviceObjects() {}
 
   explicit OpenSLESPlayer(AudioManager* audio_manager);
   ~OpenSLESPlayer();
 
@@ skipping 122 matching lines @@
   SLPlayItf player_;
 
   // The Android Simple Buffer Queue interface is supported on the audio player
   // and it provides methods to send audio data from the source to the audio
   // player for rendering.
   SLAndroidSimpleBufferQueueItf simple_buffer_queue_;
 
   // This interface exposes controls for manipulating the object’s audio volume
   // properties. This interface is supported on the Audio Player object.
   SLVolumeItf volume_;
+
+  // Last time the OpenSL ES layer asked for audio data to play out.
+  uint32_t last_play_time_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_DEVICE_ANDROID_OPENSLES_PLAYER_H_