Implement VideoCapture::get, CvCapture::getProperty, IVideoCapture::getProperty as constant methods.

Changed CV_DbgAssert to CV_Assert when setting video modes for OpenNI2. Otherwise, in release mode the default modes never get set

sensors which do not have image generators.

Not all parameters are specified for openni::VideoMode, so
"selected" mode can be unsupported for device.
Replace default VideoMode constructor to result of getVideoMode() call.

Refactored code responsible for printing debug messages in DShow video capture module to reduce footprint in Release mode.

Replace printf function used for diagnostic purposes with dedicated DebugPrintOut function to output debug messages. This function is effective only in Debug mode and its body becomes empty in Release mode to reduce footprint.

Save selected FCC in order to return proper CV_CAP_PROP_FOURCC property value (currently FCC for RGB24 is always returned).

FOURCC code bytes should be placed in the reverse order.

Set correct value of sample size when calling IAMStreamConfig::SetFormat function. For non-RGB media type it can be set to zero value.
(See http://msdn.microsoft.com/en-us/library/windows/desktop/dd373477%28v=vs.85%29.aspx)

Use _com_ptr_t instead of CComPtr in ComPtr wrapper to avoid ATL dependency.

Applied in PR3260 to 2.4 branch

Applied in PR3251 to 2.4 branch

Applied in PR3251 to 2.4 branch.

Applied in PR3243 to 2.4 branch.

Applied in PR3240 to 2.4 branch.

For several muxers and encoders GStreamer still drops the last frame.

- Accurate ASYC task handling for both GStreamer generations.
- Correct video duration request for videos.
- More accurate pipeline destruction.
- Correct color space conversion plugin for GStreamer 1.0.

also use correct include path on Linux

BUGFIX: Fixed bugged when setting PVAPI property CV_CAP_PROP_FRAME_HEIGHT.

Signed-off-by: Low Chin Kian <kenlck1990@gmail.com>

Added get and set for additional PVAPI properties: DecimationHorizontal, DecimationVertical, BinningX, BinningY