restructured project structure: move projects into sub-folders, split dispmanx-grabber from hyperion

libsrc/dispmanx-grabber/DispmanxFrameGrabber.cpp

@@ -0,0 +1,56 @@
+
+#include "DispmanxFrameGrabber.h"
+
+DispmanxFrameGrabber::DispmanxFrameGrabber(const unsigned width, const unsigned height) :
+	_display(0),
+	_resource(0),
+	_width(width),
+	_height(height)
+{
+	// Initiase BCM
+	bcm_host_init();
+
+	// Open the connection to the display
+	_display = vc_dispmanx_display_open(0);
+	int ret = vc_dispmanx_display_get_info(_display, &_info);
+	// Make the compiler (in release mode) happy by 'using' ret
+	(void)ret;
+	assert(ret == 0);
+
+	// Create the resources for capturing image
+	_resource = vc_dispmanx_resource_create(
+			VC_IMAGE_RGB888,
+			width,
+			height,
+			&_vc_image_ptr);
+	assert(_resource);
+
+	// Define the capture rectangle with the same size
+	vc_dispmanx_rect_set(&_rectangle, 0, 0, width, height);
+	_pitch = width * 3;
+}
+
+DispmanxFrameGrabber::~DispmanxFrameGrabber()
+{
+	// Clean up resources
+	vc_dispmanx_resource_delete(_resource);
+
+	// Close the displaye
+	vc_dispmanx_display_close(_display);
+
+	// De-init BCM
+	bcm_host_deinit();
+}
+
+void DispmanxFrameGrabber::grabFrame(RgbImage& image)
+{
+	// Sanity check of the given image size
+	assert(image.width() == _width && image.height() == _height);
+
+	void* image_ptr = image.memptr();
+
+	// Create the snapshot
+	vc_dispmanx_snapshot(_display, _resource, VC_IMAGE_ROT0);
+	// Read the snapshot into the memory (incl down-scaling)
+	vc_dispmanx_resource_read_data(_resource, &_rectangle, image_ptr, _pitch);
+}