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#include "decklink-device-discovery.hpp"
#include "decklink-device.hpp"
#include <util/threading.h>
DeckLinkDeviceDiscovery::DeckLinkDeviceDiscovery()
{
discovery.Set(CreateDeckLinkDiscoveryInstance());
if (discovery == nullptr)
blog(LOG_INFO, "No blackmagic support");
}
DeckLinkDeviceDiscovery::~DeckLinkDeviceDiscovery(void)
{
if (discovery != nullptr) {
if (initialized)
discovery->UninstallDeviceNotifications();
for (DeckLinkDevice *device : devices)
device->Release();
}
}
bool DeckLinkDeviceDiscovery::Init(void)
{
HRESULT result = E_FAIL;
if (initialized)
return false;
if (discovery != nullptr)
result = discovery->InstallDeviceNotifications(this);
initialized = result == S_OK;
if (!initialized)
blog(LOG_DEBUG, "Failed to start search for DeckLink devices");
return initialized;
}
DeckLinkDevice *DeckLinkDeviceDiscovery::FindByHash(const char *hash)
{
DeckLinkDevice *ret = nullptr;
deviceMutex.lock();
for (DeckLinkDevice *device : devices) {
if (device->GetHash().compare(hash) == 0) {
ret = device;
ret->AddRef();
break;
}
}
deviceMutex.unlock();
return ret;
}
HRESULT STDMETHODCALLTYPE
DeckLinkDeviceDiscovery::DeckLinkDeviceArrived(IDeckLink *device)
{
DeckLinkDevice *newDev = new DeckLinkDevice(device);
if (!newDev->Init()) {
delete newDev;
return S_OK;
}
std::lock_guard<std::recursive_mutex> lock(deviceMutex);
devices.push_back(newDev);
for (DeviceChangeInfo &cb : callbacks)
cb.callback(cb.param, newDev, true);
return S_OK;
}
HRESULT STDMETHODCALLTYPE
DeckLinkDeviceDiscovery::DeckLinkDeviceRemoved(IDeckLink *device)
{
std::lock_guard<std::recursive_mutex> lock(deviceMutex);
for (size_t i = 0; i < devices.size(); i++) {
if (devices[i]->IsDevice(device)) {
for (DeviceChangeInfo &cb : callbacks)
cb.callback(cb.param, devices[i], false);
devices[i]->Release();
devices.erase(devices.begin() + i);
break;
}
}
return S_OK;
}
ULONG STDMETHODCALLTYPE DeckLinkDeviceDiscovery::AddRef(void)
{
return os_atomic_inc_long(&refCount);
}
HRESULT STDMETHODCALLTYPE DeckLinkDeviceDiscovery::QueryInterface(REFIID iid,
LPVOID *ppv)
{
HRESULT result = E_NOINTERFACE;
*ppv = nullptr;
CFUUIDBytes unknown = CFUUIDGetUUIDBytes(IUnknownUUID);
if (memcmp(&iid, &unknown, sizeof(REFIID)) == 0) {
*ppv = this;
AddRef();
result = S_OK;
} else if (memcmp(&iid, &IID_IDeckLinkDeviceNotificationCallback,
sizeof(REFIID)) == 0) {
*ppv = (IDeckLinkDeviceNotificationCallback *)this;
AddRef();
result = S_OK;
}
return result;
}
ULONG STDMETHODCALLTYPE DeckLinkDeviceDiscovery::Release(void)
{
const long newRefCount = os_atomic_dec_long(&refCount);
if (newRefCount == 0) {
delete this;
return 0;
}
return newRefCount;
}
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