libcamera: stream: Add ColorSpace fields to StreamConfiguration

This is so that applications can choose appropriate color spaces which
will then be passed down to the V4L2 devices.

The ColorSpace field is actually optional. If it is not set you will
get the camera's default color space.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Umang Jain <umang.jain@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

include/libcamera/stream.h

@@ -12,6 +12,7 @@
 #include <string>
 #include <vector>
 
+#include <libcamera/color_space.h>
 #include <libcamera/framebuffer.h>
 #include <libcamera/geometry.h>
 #include <libcamera/pixel_format.h>
@@ -47,6 +48,8 @@ struct StreamConfiguration {
 
 	unsigned int bufferCount;
 
+	std::optional<ColorSpace> colorSpace;
+
 	Stream *stream() const { return stream_; }
 	void setStream(Stream *stream) { stream_ = stream; }
 	const StreamFormats &formats() const { return formats_; }