Added code for amlogic grabber.

Former-commit-id: fdb9c1c5d8ce02d531d2008057e22f1ae8f7d04e

libsrc/grabber/amlogic/AmlogicGrabber.cpp

@@ -0,0 +1,87 @@
+
+// STL includes
+#include <cassert>
+#include <iostream>
+
+// Linux includes
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+// Local includes
+#include "AmlogicGrabber.h"
+
+// Flags copied from 'linux/amlogic/amports/amvideocap.h' at https://github.com/codesnake/linux-amlogic/
+#define AMVIDEOCAP_IOC_MAGIC 'V'
+#define AMVIDEOCAP_IOW_SET_WANTFRAME_WIDTH      		_IOW(AMVIDEOCAP_IOC_MAGIC, 0x02, int)
+#define AMVIDEOCAP_IOW_SET_WANTFRAME_HEIGHT     		_IOW(AMVIDEOCAP_IOC_MAGIC, 0x03, int)
+
+AmlogicGrabber::AmlogicGrabber(const unsigned width, const unsigned height) :
+	_width(width),
+	_height(height),
+	_amlogicCaptureDev(-1)
+{
+	_amlogicCaptureDev = open("/dev/amvideocap0", O_RDONLY, 0);
+	if (_amlogicCaptureDev == -1)
+	{
+		std::cerr << "[" << __PRETTY_FUNCTION__ << "] Failed to open the AMLOGIC device (" << errno << ")" << std::endl;
+		return;
+	}
+	
+	if (ioctl(_amlogicCaptureDev, AMVIDEOCAP_IOW_SET_WANTFRAME_WIDTH,  _width)  == -1 || 
+	    ioctl(_amlogicCaptureDev, AMVIDEOCAP_IOW_SET_WANTFRAME_HEIGHT, _height) == -1)
+	{
+		// Failed to configure frame width
+		std::cerr << "[" << __PRETTY_FUNCTION__ << "] Failed to configure capture size (" << errno << ")" << std::endl;
+	}
+}
+
+AmlogicGrabber::~AmlogicGrabber()
+{
+	if (_amlogicCaptureDev != -1)
+	{
+		if (close(_amlogicCaptureDev) == -1)
+		{
+			std::cerr << "[" << __PRETTY_FUNCTION__ << "] Failed to close AMLOGIC device (" << errno << ")" << std::endl;
+		}
+		_amlogicCaptureDev = -1;
+	}
+}
+
+void AmlogicGrabber::setVideoMode(const VideoMode videoMode)
+{
+	switch (videoMode) {
+	case VIDEO_3DSBS:
+		//vc_dispmanx_rect_set(&_rectangle, 0, 0, _width/2, _height);
+		break;
+	case VIDEO_3DTAB:
+		//vc_dispmanx_rect_set(&_rectangle, 0, 0, _width, _height/2);
+		break;
+	case VIDEO_2D:
+	default:
+		//vc_dispmanx_rect_set(&_rectangle, 0, 0, _width, _height);
+		break;
+	}
+}
+
+void AmlogicGrabber::grabFrame(Image<ColorRgb> & image)
+{
+	// resize the given image if needed
+	if (image.width() != unsigned(_rectangle.width) || image.height() != unsigned(_rectangle.height))
+	{
+		image.resize(_rectangle.width, _rectangle.height);
+	}
+	
+	// Read the snapshot into the memory
+	void * image_ptr = image.memptr();
+	const size_t bytesToRead = _width * _height * sizeof(ColorRgb);
+	const size_t bytesRead   = pread(amlogicCaptureDev, image_ptr, bytesToRead, 0)
+	if (bytesToRead != bytesRead)
+	{
+		// Read of snapshot failed
+		std::cerr << "[" << __PRETTY_FUNCTION__ << "] Capture failed to grab entire image [bytesToRead(" << bytesToRead << ") != bytesRead(" << bytesRead << ")]" << std::endl;
+	}
+}

libsrc/grabber/amlogic/AmlogicGrabber.h

@@ -0,0 +1,52 @@
+#pragma once
+
+// STL includes
+#include <cstdint>
+
+// Utils includes
+#include <utils/Image.h>
+#include <utils/ColorRgba.h>
+#include <utils/VideoMode.h>
+
+///
+/// The DispmanxFrameGrabber is used for creating snapshots of the display (screenshots) with a
+/// downsized and scaled resolution.
+///
+class AmlogicGrabber
+{
+public:
+	///
+	/// Construct a AmlogicGrabber that will capture snapshots with specified dimensions.
+	///
+	/// @param[in] width  The width of the captured screenshot
+	/// @param[in] height The heigth of the captured screenshot
+	///
+	AmlogicGrabber(const unsigned width, const unsigned height);
+	~AmlogicGrabber();
+
+	///
+	/// Set the video mode (2D/3D)
+	/// @param[in] mode The new video mode
+	///
+	void setVideoMode(const VideoMode videoMode);
+
+	///
+	/// Captures a single snapshot of the display and writes the data to the given image. The
+	/// provided image should have the same dimensions as the configured values (_width and
+	/// _height)
+	///
+	/// @param[out] image  The snapped screenshot (should be initialized with correct width and
+	/// height)
+	///
+	void grabFrame(Image<ColorRgba> & image);
+
+private:
+
+	/// With of the captured snapshot [pixels]
+	const unsigned _width;
+	/// Height of the captured snapshot [pixels]
+	const unsigned _height;
+	
+	/** The snapshot/capture device of the amlogic video chip */
+	int _amlogicCaptureDev;
+};

libsrc/grabber/amlogic/AmlogicWrapper.cpp

@@ -0,0 +1,88 @@
+// QT includes
+#include <QDebug>
+#include <QDateTime>
+
+// Hyperion includes
+#include <hyperion/Hyperion.h>
+#include <hyperion/ImageProcessorFactory.h>
+#include <hyperion/ImageProcessor.h>
+
+// Amlogic grabber includes
+#include <grabber/AmlogicWrapper.h>
+#include "AmlogicGrabber.h"
+
+
+AmlogicWrapper::AmlogicWrapper(const unsigned grabWidth, const unsigned grabHeight, const unsigned updateRate_Hz, Hyperion * hyperion) :
+	_updateInterval_ms(1000/updateRate_Hz),
+	_timeout_ms(2 * _updateInterval_ms),
+	_priority(1000),
+	_timer(),
+	_image(grabWidth, grabHeight),
+	_frameGrabber(new DispmanxFrameGrabber(grabWidth, grabHeight)),
+	_processor(ImageProcessorFactory::getInstance().newImageProcessor()),
+	_ledColors(hyperion->getLedCount(), ColorRgb{0,0,0}),
+	_hyperion(hyperion)
+{
+	// Configure the timer to generate events every n milliseconds
+	_timer.setInterval(_updateInterval_ms);
+	_timer.setSingleShot(false);
+
+	_processor->setSize(grabWidth, grabHeight);
+
+	// Connect the QTimer to this
+	QObject::connect(&_timer, SIGNAL(timeout()), this, SLOT(action()));
+}
+
+AmlogicWrapper::~AmlogicWrapper()
+{
+	// Cleanup used resources (ImageProcessor and FrameGrabber)
+	delete _processor;
+	delete _frameGrabber;
+}
+
+void AmlogicWrapper::start()
+{
+	// Start the timer with the pre configured interval
+	_timer.start();
+}
+
+void AmlogicWrapper::action()
+{
+	// Grab frame into the allocated image
+	_frameGrabber->grabFrame(_image);
+
+	_processor->process(_image, _ledColors);
+
+	_hyperion->setColors(_priority, _ledColors, _timeout_ms);
+}
+void AmlogicWrapper::stop()
+{
+	// Stop the timer, effectivly stopping the process
+	_timer.stop();
+}
+
+void AmlogicWrapper::setGrabbingMode(const GrabbingMode mode)
+{
+	switch (mode)
+	{
+	case GRABBINGMODE_VIDEO:
+//		_frameGrabber->setFlags(DISPMANX_SNAPSHOT_NO_RGB|DISPMANX_SNAPSHOT_FILL);
+		start();
+		break;
+	case GRABBINGMODE_AUDIO:
+	case GRABBINGMODE_PHOTO:
+	case GRABBINGMODE_MENU:
+	case GRABBINGMODE_INVALID:
+//		_frameGrabber->setFlags(0);
+		start();
+		break;
+	case GRABBINGMODE_OFF:
+		stop();
+		break;
+	}
+}
+
+void AmlogicWrapper::setVideoMode(const VideoMode mode)
+{
+	_frameGrabber->setVideoMode(mode);
+}

libsrc/grabber/amlogic/CMakeLists.txt

@@ -0,0 +1,29 @@
+
+# Define the current source locations
+SET(CURRENT_HEADER_DIR ${CMAKE_SOURCE_DIR}/include/grabber)
+SET(CURRENT_SOURCE_DIR ${CMAKE_SOURCE_DIR}/libsrc/grabber/amlogic)
+
+# Group the headers that go through the MOC compiler
+SET(AmlogicQT_HEADERS ${CURRENT_HEADER_DIR}/AmlogicWrapper.h)
+
+SET(AmlogicHEADERS
+		${CURRENT_SOURCE_DIR}/AmlogicGrabber.h
+)
+
+SET(AmlogicSOURCES
+		${CURRENT_SOURCE_DIR}/AmlogicWrapper.cpp
+		${CURRENT_SOURCE_DIR}/AmlogicFrameGrabber.cpp
+)
+
+QT4_WRAP_CPP(AmlogicHEADERS_MOC ${AmlogicQT_HEADERS})
+
+add_library(amlogic-grabber
+		${AmlogicHEADERS}
+		${AmlogicQT_HEADERS}
+		${AmlogicHEADERS_MOC}
+		${AmlogicSOURCES}
+)
+
+target_link_libraries(amlogic-grabber
+		hyperion
+		${QT_LIBRARIES})