SC_Apple.mm

/************************************************************************
 *
 * Copyright 2013 Seth Nickell <snickell@gmail.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 ************************************************************************/

#include "SC_Apple.hpp"
#include <atomic>

#import <Cocoa/Cocoa.h>

namespace SC { namespace Apple {

void disableAppNap() {
    // Does the App Nap API even exist on this Mac?
    if ([[NSProcessInfo processInfo] respondsToSelector:@selector(beginActivityWithOptions:reason:)]) {
        // If the API exists, then disable App Nap...

        // From NSProcessInfo.h:
        // NSActivityIdleSystemSleepDisabled = (1ULL << 20),
        // NSActivityUserInitiated = (0x00FFFFFFULL | NSActivityIdleSystemSleepDisabled),
        // NSActivityLatencyCritical = 0xFF00000000ULL

        uint64_t options = (0x00FFFFFFULL | (1ULL << 20)) | 0xFF00000000ULL;

        // NSActivityLatencyCritical | NSActivityUserInitiated
        [[NSProcessInfo processInfo] beginActivityWithOptions:options
                                                       reason:@"avoiding audio hiccups and reducing latency"];
    }
}

} // namespace Apple
} // namespace SC