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@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: ~V4LLookup()44 virtual ~V4LLookup() {} 45 IsV4L2Device(const std::string & device_path)46 static bool IsV4L2Device(const std::string& device_path) { 47 return GetV4LLookup()->CheckIsV4L2Device(device_path); 48 } 49 SetV4LLookup(V4LLookup * v4l_lookup)50 static void SetV4LLookup(V4LLookup* v4l_lookup) { 51 v4l_lookup_ = v4l_lookup; 52 } 53 GetV4LLookup()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