示例#1
0
OniStatus Context::waitForStreams(OniStreamHandle* pStreams, int streamCount, int* pStreamIndex, int timeout)
{
	static const int MAX_WAITED_STREAMS = 50;
	Device* deviceList[MAX_WAITED_STREAMS];
	VideoStream* streamsList[MAX_WAITED_STREAMS];

	unsigned long long oldestTimestamp = XN_MAX_UINT64;
	int oldestIndex = -1;

	if (streamCount > MAX_WAITED_STREAMS)
	{
		m_errorLogger.Append("Cannot wait on more than %d streams", MAX_WAITED_STREAMS);
		return ONI_STATUS_NOT_SUPPORTED;
	}

	int numDevices = 0;

	for (int i = 0; i < streamCount; ++i)
	{
		if (pStreams[i] == NULL)
		{
			continue;
		}

		streamsList[i] =  ((_OniStream*)pStreams[i])->pStream;

		Device* pDevice = &streamsList[i]->getDevice();

		// Check if device already exists.
		bool found = false;
		for (int j = 0; j < numDevices; ++j)
		{
			if (deviceList[j] == pDevice)
			{
				found = true;
				break;
			}
		}

		// Add new device to list.
		if (!found)
		{
			deviceList[numDevices] = pDevice;
			++numDevices;
		}
	}

	XN_EVENT_HANDLE hEvent = getThreadEvent();

	XnUInt64 passedTime;
	XnOSTimer workTimer;
	XnUInt32 timeToWait = timeout;
	xnOSStartTimer(&workTimer);

	do
	{
		for (int i = 0; i < streamCount; ++i)
		{
			if (pStreams[i] == NULL)
				continue;

			VideoStream* pStream = ((_OniStream*)pStreams[i])->pStream;
			pStream->lockFrame();
			OniFrame* pFrame = pStream->peekFrame();
			if (pFrame != NULL && pFrame->timestamp < oldestTimestamp)
			{
				oldestTimestamp = pFrame->timestamp;
				oldestIndex = i;
			}
			pStream->unlockFrame();
		}

		if (oldestIndex != -1)
		{
			*pStreamIndex = oldestIndex;
			break;
		}

		// 'Poke' the driver to attempt to receive more frames.
		for (int j = 0; j < numDevices; ++j)
		{
			deviceList[j]->tryManualTrigger();
		}

		if(timeout != ONI_TIMEOUT_FOREVER)
		{
			xnOSQueryTimer(workTimer, &passedTime);
			if((int)passedTime < timeout)
				timeToWait = timeout - (int)passedTime;
			else
				timeToWait = 0;
		}
	} while (XN_STATUS_OK == xnOSWaitEvent(hEvent, timeToWait));
	
	xnOSStopTimer(&workTimer);

	if (oldestIndex != -1)
	{
		return ONI_STATUS_OK;
	}

	m_errorLogger.Append("waitForStreams: timeout reached");
	return ONI_STATUS_TIME_OUT;
}
示例#2
0
OniStatus Context::waitForStreams(OniStreamHandle* pStreams, int streamCount, int* pStreamIndex, int timeout)
{
	static const int MAX_WAITED_DEVICES = 20;
	Device* deviceList[MAX_WAITED_DEVICES];

	unsigned long long oldestTimestamp = XN_MAX_UINT64;
	int oldestIndex = -1;

	int numDevices = 0;
	for (int i = 0; i < streamCount; ++i)
	{
		if (pStreams[i] != NULL)
		{
			VideoStream* pStream = ((_OniStream*)pStreams[i])->pStream;
			Device* pDevice = &pStream->getDevice();

			// Check if device already exists.
			bool found = false;
			for (int j = 0; j < numDevices; ++j)
			{
				if (deviceList[j] == pDevice)
				{
					found = true;
					break;
				}
			}

			// Add new device to list.
			if (!found)
			{
				if (numDevices < MAX_WAITED_DEVICES)
				{
					deviceList[numDevices] = pDevice;
					++numDevices;
				}
				else
				{
					// Cannot wait on streams from more than MAX_WAITED_DEVICES devices.
					return ONI_STATUS_NOT_SUPPORTED;
				}
			}
		}
	}

	do
	{
		for (int i = 0; i < streamCount; ++i)
		{
			if (pStreams[i] == NULL)
				continue;

			VideoStream* pStream = ((_OniStream*)pStreams[i])->pStream;
			pStream->lockFrame();
			OniFrame* pFrame = pStream->peekFrame();
			if (pFrame != NULL && pFrame->timestamp < oldestTimestamp)
			{
				oldestTimestamp = pFrame->timestamp;
				oldestIndex = i;
			}
			pStream->unlockFrame();
		}

		if (oldestIndex != -1)
		{
			*pStreamIndex = oldestIndex;
			return ONI_STATUS_OK;
		}

		// 'Poke' the driver to attempt to receive more frames.
		for (int j = 0; j < numDevices; ++j)
		{
			deviceList[j]->tryManualTrigger();
		}

	} while (m_newFrameAvailableEvent.Wait(timeout) == XN_STATUS_OK);

	m_errorLogger.Append("waitForStreams: timeout reached");
	return ONI_STATUS_TIME_OUT;
}