OpenMPUtilities.h

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// Copyright (c) 2008-2019 OpenShot Studios, LLC
//
// SPDX-License-Identifier: LGPL-3.0-or-later
 
#ifndef OPENSHOT_OPENMP_UTILITIES_H
#define OPENSHOT_OPENMP_UTILITIES_H
 
#include <omp.h>
#include <algorithm>
#include <string>
 
#include "Settings.h"
 
// Calculate the # of OpenMP Threads to allow
#define OPEN_MP_NUM_PROCESSORS openshot::Settings::Instance()->EffectiveOMPThreads()
#define FF_VIDEO_NUM_PROCESSORS std::clamp(openshot::Settings::Instance()->FF_THREADS, 2, openshot::Settings::Instance()->MaxAllowedThreads())
#define FF_AUDIO_NUM_PROCESSORS std::clamp(openshot::Settings::Instance()->FF_THREADS, 2, openshot::Settings::Instance()->MaxAllowedThreads())
 
// Set max-active-levels to the max supported, if possible
// (supported_active_levels is OpenMP 5.0 (November 2018) or later, only.)
#if (_OPENMP >= 201811)
  #define OPEN_MP_MAX_ACTIVE omp_get_supported_active_levels()
#else
  #define OPEN_MP_MAX_ACTIVE OPEN_MP_NUM_PROCESSORS
#endif
 
#endif