HRTFDatabaseLoader.cpp [plain text]
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "HRTFDatabaseLoader.h"
#include "HRTFDatabase.h"
#include <wtf/MainThread.h>
namespace WebCore {
HRTFDatabaseLoader* HRTFDatabaseLoader::s_loader = 0;
PassRefPtr<HRTFDatabaseLoader> HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(float sampleRate)
{
ASSERT(isMainThread());
RefPtr<HRTFDatabaseLoader> loader;
if (!s_loader) {
loader = adoptRef(new HRTFDatabaseLoader(sampleRate));
s_loader = loader.get();
loader->loadAsynchronously();
} else {
loader = s_loader;
ASSERT(sampleRate == loader->databaseSampleRate());
}
return loader;
}
HRTFDatabaseLoader::HRTFDatabaseLoader(float sampleRate)
: m_databaseLoaderThread(0)
, m_databaseSampleRate(sampleRate)
{
ASSERT(isMainThread());
}
HRTFDatabaseLoader::~HRTFDatabaseLoader()
{
ASSERT(isMainThread());
waitForLoaderThreadCompletion();
m_hrtfDatabase.clear();
ASSERT(this == s_loader);
s_loader = 0;
}
static void databaseLoaderEntry(void* threadData)
{
HRTFDatabaseLoader* loader = reinterpret_cast<HRTFDatabaseLoader*>(threadData);
ASSERT(loader);
loader->load();
}
void HRTFDatabaseLoader::load()
{
ASSERT(!isMainThread());
if (!m_hrtfDatabase.get()) {
m_hrtfDatabase = HRTFDatabase::create(m_databaseSampleRate);
}
}
void HRTFDatabaseLoader::loadAsynchronously()
{
ASSERT(isMainThread());
MutexLocker locker(m_threadLock);
if (!m_hrtfDatabase.get() && !m_databaseLoaderThread) {
m_databaseLoaderThread = createThread(databaseLoaderEntry, this, "HRTF database loader");
}
}
bool HRTFDatabaseLoader::isLoaded() const
{
return m_hrtfDatabase.get();
}
void HRTFDatabaseLoader::waitForLoaderThreadCompletion()
{
MutexLocker locker(m_threadLock);
if (m_databaseLoaderThread)
waitForThreadCompletion(m_databaseLoaderThread);
m_databaseLoaderThread = 0;
}
HRTFDatabase* HRTFDatabaseLoader::defaultHRTFDatabase()
{
if (!s_loader)
return 0;
return s_loader->database();
}
}
#endif // ENABLE(WEB_AUDIO)