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/* This file is part of the KDE project.
Copyright (C) 2007 Trolltech ASA. All rights reserved.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "displaylinkcallback.h"
#include "backendheader.h"
QT_BEGIN_NAMESPACE
namespace Phonon
{
namespace QT7
{
CVDisplayLinkRef DisplayLinkCallback::m_displayLink = 0;
int DisplayLinkCallback::m_refCount = 0;
CVTimeStamp DisplayLinkCallback::m_timeStamp;
bool DisplayLinkCallback::m_initialized = false;
static CVReturn displayLinkCallback(CVDisplayLinkRef /*displayLink*/,
const CVTimeStamp */*inNow*/,
const CVTimeStamp */*inOutputTime*/,
CVOptionFlags /*flagsIn*/,
CVOptionFlags */*flagsOut*/,
void */*displayLinkContext*/)
{
return kCVReturnSuccess;
}
CVTimeStamp LinkTimeProxy::getCVTimeStamp() const
{
return m_timeStamp;
}
void LinkTimeProxy::setCVTimeStamp(const CVTimeStamp &timeStamp)
{
m_timeStamp = timeStamp;
}
LinkTimeProxy DisplayLinkCallback::currentTime()
{
LinkTimeProxy proxy;
CVDisplayLinkGetCurrentTime(m_displayLink, &m_timeStamp);
proxy.setCVTimeStamp(m_timeStamp);
return proxy;
}
void DisplayLinkCallback::retain()
{
++m_refCount;
if (m_initialized)
return;
// First subscriber. Initialize:
m_initialized = true;
memset(&m_timeStamp, 0, sizeof(m_timeStamp));
OSStatus err = EnterMovies();
BACKEND_ASSERT2(err == noErr, "Could not initialize QuickTime", FATAL_ERROR)
err = CVDisplayLinkCreateWithCGDisplay(kCGDirectMainDisplay, &m_displayLink);
BACKEND_ASSERT2(err == noErr, "Could not create display link", FATAL_ERROR)
err = CVDisplayLinkSetCurrentCGDisplay(m_displayLink, kCGDirectMainDisplay);
BACKEND_ASSERT2(err == noErr, "Could not set the current display for the display link", FATAL_ERROR)
err = CVDisplayLinkSetOutputCallback(m_displayLink, displayLinkCallback, 0);
BACKEND_ASSERT2(err == noErr, "Could not set the callback for the display link", FATAL_ERROR)
err = CVDisplayLinkStart(m_displayLink);
BACKEND_ASSERT2(err == noErr, "Could not start the display link", FATAL_ERROR)
}
void DisplayLinkCallback::release()
{
BACKEND_ASSERT2(m_refCount > 0, "Release called for display link with refcount < 1", NORMAL_ERROR)
--m_refCount;
if (m_refCount == 0){
CVDisplayLinkStop(m_displayLink);
CFRelease(m_displayLink);
m_displayLink = 0;
ExitMovies();
m_initialized = false;
}
}
}} // namespace Phonon::QT7
QT_END_NAMESPACE
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