rs-pose-and-image.cpp

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// License: Apache 2.0. See LICENSE file in root directory.
// Copyright(c) 2019 Intel Corporation. All Rights Reserved.
#include <librealsense2/rs.hpp>
#include <iostream>
#include <iomanip>
#include <chrono>
#include <thread>
#include <mutex>

int main(int argc, char * argv[]) try
{
    // Declare RealSense pipeline, encapsulating the actual device and sensors
    rs2::pipeline pipe;
    // Create a configuration for configuring the pipeline with a non default profile
    rs2::config cfg;
    // Add pose stream
    cfg.enable_stream(RS2_STREAM_POSE, RS2_FORMAT_6DOF);
    // Enable both image streams
    // Note: It is not currently possible to enable only one
    cfg.enable_stream(RS2_STREAM_FISHEYE, 1, RS2_FORMAT_Y8);
    cfg.enable_stream(RS2_STREAM_FISHEYE, 2, RS2_FORMAT_Y8);

    // Define frame callback

    // The callback is executed on a sensor thread and can be called simultaneously from multiple sensors
    // Therefore any modification to common memory should be done under lock
    std::mutex data_mutex;
    uint64_t pose_counter = 0;
    uint64_t frame_counter = 0;
    bool first_data = true;
    auto last_print = std::chrono::system_clock::now();
    auto callback = [&](const rs2::frame& frame)
    {
        std::lock_guard<std::mutex> lock(data_mutex);
        // Only start measuring time elapsed once we have received the
        // first piece of data
        if (first_data) {
            first_data = false;
            last_print = std::chrono::system_clock::now();
        }

        if (auto fp = frame.as<rs2::pose_frame>()) {
            pose_counter++;
        }
        else if (auto fs = frame.as<rs2::frameset>()) {
            frame_counter++;
        }

        // Print the approximate pose and image rates once per second
        auto now = std::chrono::system_clock::now();
        if (now - last_print >= std::chrono::seconds(1)) {
            std::cout << "\r" << std::setprecision(0) << std::fixed
                      << "Pose rate: "  << pose_counter << " "
                      << "Image rate: " << frame_counter << std::flush;
            pose_counter = 0;
            frame_counter = 0;
            last_print = now;
        }
    };

    // Start streaming through the callback
    rs2::pipeline_profile profiles = pipe.start(cfg, callback);

    // Sleep this thread until we are done
    while(true) {
        std::this_thread::sleep_for(std::chrono::milliseconds(10));
    }

    return EXIT_SUCCESS;
}
catch (const rs2::error & e)
{
    std::cerr << "RealSense error calling " << e.get_failed_function() << "(" << e.get_failed_args() << "):\n    " << e.what() << std::endl;
    return EXIT_FAILURE;
}
catch (const std::exception& e)
{
    std::cerr << e.what() << std::endl;
    return EXIT_FAILURE;
}