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      1 /*
      2  * Copyright 2009 Google Inc.
      3  * Author: lexnikitin (at) google.com (Alexey Nikitin)
      4  *
      5  * V4LLookup provides basic functionality to work with V2L2 devices in Linux
      6  * The functionality is implemented as a class with virtual methods for
      7  * the purpose of unit testing.
      8  */
      9 #ifndef TALK_MEDIA_DEVICES_V4LLOOKUP_H_
     10 #define TALK_MEDIA_DEVICES_V4LLOOKUP_H_
     11 
     12 #include <string>
     13 
     14 #ifdef LINUX
     15 namespace cricket {
     16 class V4LLookup {
     17  public:
     18   virtual ~V4LLookup() {}
     19 
     20   static bool IsV4L2Device(const std::string& device_path) {
     21     return GetV4LLookup()->CheckIsV4L2Device(device_path);
     22   }
     23 
     24   static void SetV4LLookup(V4LLookup* v4l_lookup) {
     25     v4l_lookup_ = v4l_lookup;
     26   }
     27 
     28   static V4LLookup* GetV4LLookup() {
     29     if (!v4l_lookup_) {
     30       v4l_lookup_ = new V4LLookup();
     31     }
     32     return v4l_lookup_;
     33   }
     34 
     35  protected:
     36   static V4LLookup* v4l_lookup_;
     37   // Making virtual so it is easier to mock
     38   virtual bool CheckIsV4L2Device(const std::string& device_path);
     39 };
     40 
     41 }  // namespace cricket
     42 
     43 #endif  // LINUX
     44 #endif  // TALK_MEDIA_DEVICES_V4LLOOKUP_H_
     45