Home | History | Annotate | Download | only in devices 
      1 /*
      2  * libjingle
      3  * Copyright 2009 Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 /*
     29  * Author: lexnikitin (at) google.com (Alexey Nikitin)
     30  *
     31  * V4LLookup provides basic functionality to work with V2L2 devices in Linux
     32  * The functionality is implemented as a class with virtual methods for
     33  * the purpose of unit testing.
     34  */
     35 #ifndef TALK_MEDIA_DEVICES_V4LLOOKUP_H_
     36 #define TALK_MEDIA_DEVICES_V4LLOOKUP_H_
     37 
     38 #include <string>
     39 
     40 #ifdef WEBRTC_LINUX
     41 namespace cricket {
     42 class V4LLookup {
     43  public:
     44   virtual ~V4LLookup() {}
     45 
     46   static bool IsV4L2Device(const std::string& device_path) {
     47     return GetV4LLookup()->CheckIsV4L2Device(device_path);
     48   }
     49 
     50   static void SetV4LLookup(V4LLookup* v4l_lookup) {
     51     v4l_lookup_ = v4l_lookup;
     52   }
     53 
     54   static V4LLookup* GetV4LLookup() {
     55     if (!v4l_lookup_) {
     56       v4l_lookup_ = new V4LLookup();
     57     }
     58     return v4l_lookup_;
     59   }
     60 
     61  protected:
     62   static V4LLookup* v4l_lookup_;
     63   // Making virtual so it is easier to mock
     64   virtual bool CheckIsV4L2Device(const std::string& device_path);
     65 };
     66 
     67 }  // namespace cricket
     68 
     69 #endif  // WEBRTC_LINUX
     70 #endif  // TALK_MEDIA_DEVICES_V4LLOOKUP_H_
     71