vcap: Initial implementation

This UPM module captures a still frame from a Linux V4L device, such
as a USB webcam, and and then allows you to save it as a JPEG image
into a file.

The camera and driver in use must support streaming, mmap-able buffers
and must provide data in YUYV format.  This should encompass most
video cameras out there.  It has been tested with a few off the shelf
USB cameras without any problems.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/vcap/CMakeLists.txt

@@ -0,0 +1,18 @@
+set (libname "vcap")
+set (libdescription "upm Video Frame Capture and image save utility")
+set (module_src ${libname}.cxx)
+set (module_h ${libname}.hpp)
+set (reqlibname "jpeg")
+upm_module_init()
+target_link_libraries(${libname} jpeg)
+if (BUILDSWIG)
+  if (BUILDSWIGNODE)
+    swig_link_libraries (jsupm_${libname} jpeg ${MRAA_LIBRARIES} ${NODE_LIBRARIES})
+  endif()
+  if (BUILDSWIGPYTHON)
+    swig_link_libraries (pyupm_${libname} jpeg ${PYTHON_LIBRARIES} ${MRAA_LIBRARIES})
+  endif()
+  if (BUILDSWIGJAVA)
+    swig_link_libraries (javaupm_${libname} jpeg ${MRAAJAVA_LDFLAGS} ${JAVA_LDFLAGS})
+  endif()
+endif()