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
41namespace cricket {
42class 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