backend.cpp

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// License: Apache 2.0. See LICENSE file in root directory.
// Copyright(c) 2015 Intel Corporation. All Rights Reserved.

#if defined(RS2_USE_LIBUVC_BACKEND) && !defined(RS2_USE_WMF_BACKEND) && !defined(RS2_USE_V4L2_BACKEND) && !defined(RS2_USE_WINUSB_UVC_BACKEND)  && !defined(RS2_USE_ANDROID_BACKEND)
// UVC support will be provided via libuvc / libusb backend
#elif !defined(RS2_USE_LIBUVC_BACKEND) && defined(RS2_USE_WMF_BACKEND) && !defined(RS2_USE_V4L2_BACKEND) && !defined(RS2_USE_WINUSB_UVC_BACKEND) && !defined(RS2_USE_ANDROID_BACKEND)
// UVC support will be provided via Windows Media Foundation / WinUSB backend
#elif !defined(RS2_USE_LIBUVC_BACKEND) && !defined(RS2_USE_WMF_BACKEND) && !defined(RS2_USE_V4L2_BACKEND) && defined(RS2_USE_WINUSB_UVC_BACKEND)&&!defined(RS2_USE_ANDROID_BACKEND)
// UVC support will be provided via WinUSB / WinUSB backend
#elif !defined(RS2_USE_LIBUVC_BACKEND) && !defined(RS2_USE_WMF_BACKEND) && defined(RS2_USE_V4L2_BACKEND) && !defined(RS2_USE_WINUSB_UVC_BACKEND)&&!defined(RS2_USE_ANDROID_BACKEND)
// UVC support will be provided via Video 4 Linux 2 / libusb backend
#elif !defined(RS2_USE_LIBUVC_BACKEND) && !defined(RS2_USE_WMF_BACKEND) && !defined(RS2_USE_V4L2_BACKEND) && !defined(RS2_USE_WINUSB_UVC_BACKEND) && defined(RS2_USE_ANDROID_BACKEND)
// UVC support will be provided via Android backend
#else
#error No UVC backend selected. Please #define exactly one of RS2_USE_LIBUVC_BACKEND, RS2_USE_WMF_BACKEND, RS2_USE_WINUSB_UVC_BACKEND or RS2_USE_V4L2_BACKEND
#endif

#include "backend.h"
void librealsense::platform::control_range::populate_raw_data(std::vector<uint8_t>& vec, int32_t value)
{
    vec.resize(sizeof(value));
    auto data = reinterpret_cast<const uint8_t*>(&value);
    std::copy(data, data + sizeof(value), vec.data());
}

double librealsense::monotonic_to_realtime(double monotonic)
{
    auto realtime = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
    auto time_since_epoch = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now().time_since_epoch()).count();
    return monotonic + (realtime - time_since_epoch);
}