HRTFDatabaseLoader.cpp [plain text]
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "HRTFDatabaseLoader.h"
#include "HRTFDatabase.h"
#include <wtf/HashMap.h>
#include <wtf/MainThread.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
static HashMap<double, HRTFDatabaseLoader*>& loaderMap()
{
static NeverDestroyed<HashMap<double, HRTFDatabaseLoader*>> loaderMap;
return loaderMap;
}
Ref<HRTFDatabaseLoader> HRTFDatabaseLoader::createAndLoadAsynchronouslyIfNecessary(float sampleRate)
{
ASSERT(isMainThread());
if (RefPtr<HRTFDatabaseLoader> loader = loaderMap().get(sampleRate)) {
ASSERT(sampleRate == loader->databaseSampleRate());
return loader.releaseNonNull();
}
auto loader = adoptRef(*new HRTFDatabaseLoader(sampleRate));
loaderMap().add(sampleRate, loader.ptr());
loader->loadAsynchronously();
return loader;
}
HRTFDatabaseLoader::HRTFDatabaseLoader(float sampleRate)
: m_databaseSampleRate(sampleRate)
{
ASSERT(isMainThread());
}
HRTFDatabaseLoader::~HRTFDatabaseLoader()
{
ASSERT(isMainThread());
waitForLoaderThreadCompletion();
m_hrtfDatabase = nullptr;
loaderMap().remove(m_databaseSampleRate);
}
void HRTFDatabaseLoader::load()
{
ASSERT(!isMainThread());
if (!m_hrtfDatabase.get()) {
m_hrtfDatabase = std::make_unique<HRTFDatabase>(m_databaseSampleRate);
}
}
void HRTFDatabaseLoader::loadAsynchronously()
{
ASSERT(isMainThread());
LockHolder locker(m_threadLock);
if (!m_hrtfDatabase.get() && !m_databaseLoaderThread) {
m_databaseLoaderThread = Thread::create("HRTF database loader", [this] {
load();
});
}
}
bool HRTFDatabaseLoader::isLoaded() const
{
return m_hrtfDatabase.get();
}
void HRTFDatabaseLoader::waitForLoaderThreadCompletion()
{
LockHolder locker(m_threadLock);
if (m_databaseLoaderThread)
m_databaseLoaderThread->waitForCompletion();
m_databaseLoaderThread = nullptr;
}
}
#endif // ENABLE(WEB_AUDIO)