C++ (Cpp) attributes_s Examples

Example #1

File: interface.cpp Project: jarikomppa/escapi

int CountCaptureDevices()
{
	HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);

	if (FAILED(hr)) return 0;

	hr = MFStartup(MF_VERSION);

	if (FAILED(hr)) return 0;

	// choose device
	IMFAttributes *attributes = NULL;
	hr = MFCreateAttributes(&attributes, 1);
	ScopedRelease<IMFAttributes> attributes_s(attributes);

	if (FAILED(hr)) return 0;

	hr = attributes->SetGUID(
		MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE,
		MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID
		);
	if (FAILED(hr)) return 0;

	ChooseDeviceParam param = { 0 };
	hr = MFEnumDeviceSources(attributes, &param.mDevices, &param.mCount);

	if (FAILED(hr)) return 0;

	return param.mCount;
}

Example #2

File: interface.cpp Project: jarikomppa/escapi

void GetCaptureDeviceName(int aDevice, char * aNamebuffer, int aBufferlength)
{
	int i;
	if (!aNamebuffer || aBufferlength <= 0)
		return;

	aNamebuffer[0] = 0;

	HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);

	if (FAILED(hr)) return;

	hr = MFStartup(MF_VERSION);

	if (FAILED(hr)) return;

	// choose device
	IMFAttributes *attributes = NULL;
	hr = MFCreateAttributes(&attributes, 1);
	ScopedRelease<IMFAttributes> attributes_s(attributes);

	if (FAILED(hr)) return;

	hr = attributes->SetGUID(
		MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE,
		MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID
		);

	if (FAILED(hr)) return;

	ChooseDeviceParam param = { 0 };
	hr = MFEnumDeviceSources(attributes, &param.mDevices, &param.mCount);

	if (FAILED(hr)) return;

	if (aDevice < (signed)param.mCount)
	{
		WCHAR *name = 0;
		UINT32 namelen = 255;
		hr = param.mDevices[aDevice]->GetAllocatedString(
			MF_DEVSOURCE_ATTRIBUTE_FRIENDLY_NAME,
			&name,
			&namelen
			);
		if (SUCCEEDED(hr) && name)
		{
			i = 0;
			while (i < aBufferlength - 1 && i < (signed)namelen && name[i] != 0)
			{
				aNamebuffer[i] = (char)name[i];
				i++;
			}
			aNamebuffer[i] = 0;

			CoTaskMemFree(name);
		}
	}
}

Example #3

File: capture.cpp Project: NathanW2/escapi

HRESULT CaptureClass::initCapture(int aDevice)
{
	mWhoAmI = aDevice;
	HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);

	DO_OR_DIE;

	hr = MFStartup(MF_VERSION);

	DO_OR_DIE;

	// choose device
	IMFAttributes *attributes = NULL;
	hr = MFCreateAttributes(&attributes, 1);
	ScopedRelease<IMFAttributes> attributes_s(attributes);

	DO_OR_DIE;

	hr = attributes->SetGUID(
		MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE,
		MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID
		);

	DO_OR_DIE;

	ChooseDeviceParam param = { 0 };
	hr = MFEnumDeviceSources(attributes, &param.mDevices, &param.mCount);

	DO_OR_DIE;

	if ((signed)param.mCount > aDevice)
	{
		// use param.ppDevices[0]
		IMFAttributes   *attributes = NULL;
		IMFMediaType    *type = NULL;
		EnterCriticalSection(&mCritsec);

		hr = param.mDevices[aDevice]->ActivateObject(
			__uuidof(IMFMediaSource),
			(void**)&mSource
			);

		DO_OR_DIE_CRITSECTION;

		hr = MFCreateAttributes(&attributes, 3);
		ScopedRelease<IMFAttributes> attributes_s(attributes);

		DO_OR_DIE_CRITSECTION;

		hr = attributes->SetUINT32(MF_READWRITE_DISABLE_CONVERTERS, TRUE);

		DO_OR_DIE_CRITSECTION;

		hr = attributes->SetUnknown(
			MF_SOURCE_READER_ASYNC_CALLBACK,
			this
			);

		DO_OR_DIE_CRITSECTION;

		hr = MFCreateSourceReaderFromMediaSource(
			mSource,
			attributes,
			&mReader
			);

		DO_OR_DIE_CRITSECTION;

		int preferredmode = scanMediaTypes(gParams[mWhoAmI].mWidth, gParams[mWhoAmI].mHeight);
		mUsedIndex = preferredmode;

		hr = mReader->GetNativeMediaType(
			(DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM,
			preferredmode,
			&type
			);
		ScopedRelease<IMFMediaType> type_s(type);

		DO_OR_DIE_CRITSECTION;

		hr = setVideoType(type);

		DO_OR_DIE_CRITSECTION;

		hr = mReader->SetCurrentMediaType(
			(DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM,
			NULL,
			type
			);

		DO_OR_DIE_CRITSECTION;

		hr = mReader->ReadSample(
			(DWORD)MF_SOURCE_READER_FIRST_VIDEO_STREAM,
			0,
			NULL,
			NULL,
			NULL,
			NULL
			);

		DO_OR_DIE_CRITSECTION;

		LeaveCriticalSection(&mCritsec);
	}
	else
	{
		return MF_E_INVALIDINDEX;
	}

	/*
	for (i = 0; i < 16; i++)
	{
	char temp[128];
	float v;
	int f;
	int r = GetProperty(i, v, f);
	sprintf(temp, "%d: %3.3f %d (%d)\n", i, v, f, r);
	OutputDebugStringA(temp);
	}
	*/

	return 0;
}