Lock scheme #4: Introduced the render sample queue for the aec and aecm

webrtc/modules/audio_processing/processing_component.h

 /*
  *  Copyright (c) 2012 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.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_PROCESSING_COMPONENT_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_PROCESSING_COMPONENT_H_
 
 #include <vector>
 
 #include "webrtc/common.h"
 
 namespace webrtc {
 
+// Functor to use when supplying a verifier function for the queue item
+// verifcation.
+template <typename T>
+class RenderQueueItemVerifier {
+ public:
+  explicit RenderQueueItemVerifier(size_t minimum_capacity)
+      : minimum_capacity_(minimum_capacity) {}
+
+  bool operator()(const std::vector<T>& v) const {
+    return v.capacity() >= minimum_capacity_;
+  }
+
+ private:
+  size_t minimum_capacity_;
+};
+
 class ProcessingComponent {
  public:
   ProcessingComponent();
   virtual ~ProcessingComponent();
 
   virtual int Initialize();
   virtual void SetExtraOptions(const Config& config) {}
   virtual int Destroy();
 
   bool is_component_enabled() const;
@@ skipping 14 matching lines @@
 
   std::vector<void*> handles_;
   bool initialized_;
   bool enabled_;
   int num_handles_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_PROCESSING_COMPONENT_H__