diff --git a/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc b/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc index 0057946cc..d5559fa63 100644 --- a/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc +++ b/protocols/jabber/libjingle/talk/session/phone/v4llookup.cc @@ -1,67 +1,68 @@ /* * Copyright 2009, Google Inc. * Author: lexnikitin@google.com (Alexey Nikitin) * * V4LLookup provides basic functionality to work with V2L2 devices in Linux * The functionality is implemented as a class with virtual methods for * the purpose of unit testing. */ #include "talk/session/phone/v4llookup.h" #include #include #include #include #include #include #include +#include #include #include #include "talk/base/logging.h" namespace cricket { V4LLookup *V4LLookup::v4l_lookup_ = NULL; bool V4LLookup::CheckIsV4L2Device(const std::string& device_path) { // check device major/minor numbers are in the range for video devices. struct stat s; if (lstat(device_path.c_str(), &s) != 0 || !S_ISCHR(s.st_mode)) return false; int video_fd = -1; bool is_v4l2 = false; // check major/minur device numbers are in range for video device if (major(s.st_rdev) == 81) { dev_t num = minor(s.st_rdev); if (num <= 63 && num >= 0) { video_fd = ::open(device_path.c_str(), O_RDONLY | O_NONBLOCK); if ((video_fd >= 0) || (errno == EBUSY)) { ::v4l2_capability video_caps; memset(&video_caps, 0, sizeof(video_caps)); if ((errno == EBUSY) || (::ioctl(video_fd, VIDIOC_QUERYCAP, &video_caps) >= 0 && (video_caps.capabilities & V4L2_CAP_VIDEO_CAPTURE))) { LOG(LS_INFO) << "Found V4L2 capture device " << device_path; is_v4l2 = true; } else { LOG(LS_ERROR) << "VIDIOC_QUERYCAP failed for " << device_path; } } else { LOG(LS_ERROR) << "Failed to open " << device_path; } } } if (video_fd >= 0) ::close(video_fd); return is_v4l2; } }; // namespace cricket