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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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This commit is contained in:
Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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44
dom/media/systemservices/OSXRunLoopSingleton.cpp Normal file
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "OSXRunLoopSingleton.h"
#include <mozilla/StaticMutex.h>
#include <AudioUnit/AudioUnit.h>
#include <CoreAudio/AudioHardware.h>
#include <CoreAudio/HostTime.h>
#include <CoreFoundation/CoreFoundation.h>
static bool gRunLoopSet = false;
static mozilla::StaticMutex gMutex;
void mozilla_set_coreaudio_notification_runloop_if_needed()
{
mozilla::StaticMutexAutoLock lock(gMutex);
if (gRunLoopSet) {
return;
}
/* This is needed so that AudioUnit listeners get called on this thread, and
* not the main thread. If we don't do that, they are not called, or a crash
* occur, depending on the OSX version. */
AudioObjectPropertyAddress runloop_address = {
kAudioHardwarePropertyRunLoop,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
CFRunLoopRef run_loop = nullptr;
OSStatus r;
r = AudioObjectSetPropertyData(kAudioObjectSystemObject,
&runloop_address,
0, NULL, sizeof(CFRunLoopRef), &run_loop);
if (r != noErr) {
NS_WARNING("Could not make global CoreAudio notifications use their own thread.");
}
gRunLoopSet = true;
}