PlatformClockCA.cpp [plain text]
#include "config.h"
#if USE(COREAUDIO)
#include "PlatformClockCA.h"
#include <AudioToolbox/CoreAudioClock.h>
#include <CoreAudio/AudioHardware.h>
using namespace WebCore;
PlatformClockCA::PlatformClockCA()
: m_clock(0)
, m_running(false)
{
CAClockNew(0, &m_clock);
UInt32 timebase = kCAClockTimebase_AudioDevice;
UInt32 timebaseSize = sizeof(timebase);
CAClockSetProperty(m_clock, kCAClockProperty_InternalTimebase, timebaseSize, &timebase);
AudioObjectID defaultAudioOutput = 0;
UInt32 defaultAudioOutputSize = sizeof(defaultAudioOutput);
AudioObjectPropertyAddress address;
address.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
address.mScope = kAudioObjectPropertyScopeGlobal;
address.mElement = kAudioObjectPropertyElementMaster;
AudioObjectGetPropertyData(kAudioObjectSystemObject, &address, 0, 0, &defaultAudioOutputSize, &defaultAudioOutput);
CAClockSetProperty(m_clock, kCAClockProperty_TimebaseSource, defaultAudioOutputSize, &defaultAudioOutput);
}
PlatformClockCA::~PlatformClockCA()
{
CAClockDispose(m_clock);
}
void PlatformClockCA::setCurrentTime(double time)
{
if (m_running)
CAClockStop(m_clock);
CAClockTime caTime;
caTime.format = kCAClockTimeFormat_Seconds;
caTime.time.seconds = time;
CAClockSetCurrentTime(m_clock, &caTime);
if (m_running)
CAClockStart(m_clock);
}
double PlatformClockCA::currentTime() const
{
CAClockTime caTime;
if (m_running) {
if (CAClockGetCurrentTime(m_clock, kCAClockTimeFormat_Seconds, &caTime) == noErr)
return caTime.time.seconds;
} else {
if (CAClockGetStartTime(m_clock, kCAClockTimeFormat_Seconds, &caTime) == noErr)
return caTime.time.seconds;
}
return 0;
}
void PlatformClockCA::setPlayRate(double rate)
{
CAClockSetPlayRate(m_clock, rate);
}
double PlatformClockCA::PlatformClockCA::playRate() const
{
double rate = 0;
if (CAClockGetPlayRate(m_clock, &rate) == noErr)
return rate;
return 0;
}
void PlatformClockCA::start()
{
if (m_running)
return;
m_running = true;
CAClockStart(m_clock);
}
void PlatformClockCA::stop()
{
if (!m_running)
return;
m_running = false;
CAClockStop(m_clock);
}
#endif