text: /****************************************************************************
   * examples/multi_webcamera/multiwebcam_perf.h
   *
   *   Copyright 2019, 2020 Sony Semiconductor Solutions Corporation
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   * 3. Neither the name NuttX nor the names of its contributors may be
   *    used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   *
   ****************************************************************************/
  
  #ifndef __EXAMPLE_MULTIWEBCAM_PERF_H__
  #define __EXAMPLE_MULTIWEBCAM_PERF_H__
  
  #include <nuttx/config.h>
  
  #ifdef CONFIG_EXAMPLES_MULTIWEBCAM_PERF
  
  #  include <stdio.h>
  #  include <sys/time.h>
  #  include <time.h>
  
  #  define PREPARE_PERF_VARIABLES()  struct timeval now, then
  #  define SET_INITIAL_TIME()        gettimeofday(&then, NULL)
  #  define PRINT_DIFF_TIME(send_bytes) \
    do \
      { \
        int ___time_diff; \
        gettimeofday(&now, NULL); \
        ___time_diff = (((now.tv_sec - then.tv_sec) * 1000) \
                     + ((now.tv_usec - then.tv_usec) / 1000)); \
        then = now; \
        printf("[%d ms] %d bytes (rate: %10.3f bps)\n", \
                ___time_diff, \
                (send_bytes), \
                ((float)(send_bytes * 8 * 1000) / (float)___time_diff)  \
              ); \
      } \
    while(0)
  
  #else
  
  #  define PREPARE_PERF_VARIABLES()
  #  define SET_INITIAL_TIME()
  #  define PRINT_DIFF_TIME(b)
  
  #endif
  
  #endif  /* __EXAMPLE_MULTIWEBCAM_PERFORM_H__ */
  