HRTFDatabaseLoader.cpp [plain text]
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "HRTFDatabaseLoader.h"
#include "HRTFDatabase.h"
#include <wtf/MainThread.h>
namespace WebCore {
HRTFDatabaseLoader::LoaderMap* HRTFDatabaseLoader::s_loaderMap = 0;
PassRefPtr<HRTFDatabaseLoader> HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(float sampleRate)
{
ASSERT(isMainThread());
RefPtr<HRTFDatabaseLoader> loader;
if (!s_loaderMap)
s_loaderMap = adoptPtr(new LoaderMap()).leakPtr();
loader = s_loaderMap->get(sampleRate);
if (loader) {
ASSERT(sampleRate == loader->databaseSampleRate());
return loader;
}
loader = adoptRef(new HRTFDatabaseLoader(sampleRate));
s_loaderMap->add(sampleRate, loader.get());
loader->loadAsynchronously();
return loader;
}
HRTFDatabaseLoader::HRTFDatabaseLoader(float sampleRate)
: m_databaseLoaderThread(0)
, m_databaseSampleRate(sampleRate)
{
ASSERT(isMainThread());
}
HRTFDatabaseLoader::~HRTFDatabaseLoader()
{
ASSERT(isMainThread());
waitForLoaderThreadCompletion();
m_hrtfDatabase.clear();
if (s_loaderMap)
s_loaderMap->remove(m_databaseSampleRate);
}
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;
}
}
#endif // ENABLE(WEB_AUDIO)