DirectX multi-monitor support (#966)

* Needed changes before multi-monitor support

* Add multi-monitor and P010 detection

* Initial multi-monitor support

* Fix multi-monitor capturing

Author: awawa-dev

Diff for: include/base/Grabber.h

@@ -176,6 +176,8 @@ public slots:
 
 	int getTargetSystemFrameDimension(int& targetSizeX, int& targetSizeY);
 
+	int getTargetSystemFrameDimension(int actualWidth, int actualHeight, int& targetSizeX, int& targetSizeY);
+
 	void processSystemFrameBGRA(uint8_t* source, int lineSize = 0, bool useLut = true);
 
 	void processSystemFrameBGR(uint8_t* source, int lineSize = 0);

Diff for: include/grabber/windows/DX/DxGrabber.h

@@ -18,13 +18,61 @@
 	#include <vector>
 	#include <map>
 	#include <chrono>
+	#include <list>
+	#include <algorithm>
 #endif
 
 // util includes
 #include <utils/PixelFormat.h>
 #include <base/Grabber.h>
 #include <utils/Components.h>
 
+template <class T> void SafeRelease(T** ppT)
+{
+	if (*ppT)
+	{
+		(*ppT)->Release();
+		*ppT = NULL;
+	}
+}
+
+struct DisplayHandle
+{
+	QString name;
+	int warningCounter = 6;
+	bool wideGamut = false;
+	int actualDivide = -1, actualWidth = 0, actualHeight = 0;
+	uint targetMonitorNits = 0;
+	ID3D11Texture2D* d3dConvertTexture = nullptr;
+	ID3D11RenderTargetView* d3dRenderTargetView = nullptr;
+	ID3D11ShaderResourceView* d3dConvertTextureView = nullptr;
+	ID3D11VertexShader* d3dVertexShader = nullptr;
+	ID3D11PixelShader* d3dPixelShader = nullptr;
+	ID3D11Buffer* d3dBuffer = nullptr;
+	ID3D11SamplerState* d3dSampler = nullptr;
+	ID3D11InputLayout* d3dVertexLayout = nullptr;
+	IDXGIOutputDuplication* d3dDuplicate = nullptr;
+	ID3D11Texture2D* d3dSourceTexture = nullptr;
+	DXGI_OUTDUPL_DESC surfaceProperties{};
+
+	DisplayHandle() = default;
+	DisplayHandle(const DisplayHandle&) = delete;
+	~DisplayHandle()
+	{
+		SafeRelease(&d3dRenderTargetView);
+		SafeRelease(&d3dSourceTexture);
+		SafeRelease(&d3dConvertTextureView);
+		SafeRelease(&d3dConvertTexture);
+		SafeRelease(&d3dVertexShader);
+		SafeRelease(&d3dVertexLayout);
+		SafeRelease(&d3dPixelShader);
+		SafeRelease(&d3dSampler);
+		SafeRelease(&d3dBuffer);
+		SafeRelease(&d3dDuplicate);
+		printf("SmartPointer is removing: DisplayHandle for %s\n", QSTRING_CSTR(name));
+	};
+};
+
 class DxGrabber : public Grabber
 {
 	Q_OBJECT
@@ -56,6 +104,13 @@ public slots:
 	void restart();
 
 private:
+
+	const QString MULTI_MONITOR = "MULTI-MONITOR";
+
+	void captureFrame(DisplayHandle& display);
+
+	int captureFrame(DisplayHandle& display, Image<ColorRgb>& image);
+
 	QString GetSharedLut();
 
 	void enumerateDevices(bool silent);
@@ -70,29 +125,17 @@ public slots:
 
 	bool initDirectX(QString selectedDeviceName);
 
-	bool initShaders();
-	HRESULT deepScaledCopy(ID3D11Texture2D* source);
+	bool initShaders(DisplayHandle& display);
+	HRESULT deepScaledCopy(DisplayHandle& display, ID3D11Texture2D* source);
 
 	QString					_configurationPath;
 	QTimer*					_timer;
 	QTimer*					_retryTimer;
-	int						_warningCounter;
-	int						_actualDivide;
-	bool					_wideGamut;
+	bool					_multiMonitor;
 
 	bool					_dxRestartNow;
+	std::list<std::unique_ptr<DisplayHandle>> _handles;
 	ID3D11Device*			_d3dDevice;
 	ID3D11DeviceContext*	_d3dContext;
-	ID3D11Buffer*			_d3dBuffer;
-	ID3D11SamplerState*		_d3dSampler;
-	ID3D11InputLayout*		_d3dVertexLayout;
-	ID3D11VertexShader*		_d3dVertexShader;
-	ID3D11PixelShader*		_d3dPixelShader;
-	ID3D11Texture2D*		_d3dSourceTexture;
-	ID3D11Texture2D*		_d3dConvertTexture;
-	ID3D11ShaderResourceView* _d3dConvertTextureView;
-	ID3D11RenderTargetView* _d3dRenderTargetView;
-	IDXGIOutputDuplication* _d3dDuplicate;
-	DXGI_OUTDUPL_DESC		_surfaceProperties;
 	Image<ColorRgb>			_cacheImage;
 };

Diff for: include/image/Image.h

@@ -30,6 +30,8 @@ class Image
 
 	void gradientVBox(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t r, uint8_t g, uint8_t b);
 
+	void insertHorizontal(int x, Image<ColorSpace>& source);
+
 	unsigned width() const;
 
 	unsigned height() const;

Diff for: include/utils/PixelFormat.h

@@ -11,6 +11,7 @@ enum class PixelFormat {
 	I420,
 	NV12,
 	MJPEG,
+	P010,
 	NO_CHANGE
 };
 
@@ -42,6 +43,10 @@ inline PixelFormat parsePixelFormat(const QString& pixelFormat)
 	{
 		return PixelFormat::MJPEG;
 	}
+	else if (format.compare("p010") == 0)
+	{
+		return PixelFormat::P010;
+	}
 
 	return PixelFormat::NO_CHANGE;
 }
@@ -73,6 +78,10 @@ inline QString pixelFormatToString(const PixelFormat& pixelFormat)
 	{
 		return "mjpeg";
 	}
+	else if (pixelFormat == PixelFormat::P010)
+	{
+		return "p010";
+	}
 
 	return "NO_CHANGE";
 }

Diff for: sources/base/Grabber.cpp

@@ -101,7 +101,24 @@ void Grabber::setEnabled(bool enable)
 
 void Grabber::setMonitorNits(int nits)
 {
-	_targetMonitorNits = nits;
+	if (_targetMonitorNits != nits)
+	{
+		_targetMonitorNits = nits;
+
+		Debug(_log, "Set nits to %i", _targetMonitorNits);
+
+		if (_initialized && !_blocked)
+		{
+			Debug(_log, "Restarting video grabber");
+			uninit();
+			start();
+		}
+		else
+		{
+			Info(_log, "Delayed restart of the grabber due to change of monitor nits value");
+			_restartNeeded = true;
+		}
+	}
 }
 
 void Grabber::setCropping(unsigned cropLeft, unsigned cropRight, unsigned cropTop, unsigned cropBottom)
@@ -128,7 +145,24 @@ void Grabber::setCropping(unsigned cropLeft, unsigned cropRight, unsigned cropTo
 
 void Grabber::enableHardwareAcceleration(bool hardware)
 {
-	_hardware = hardware;
+	if (_hardware != hardware)
+	{
+		_hardware = hardware;
+
+		Debug(_log, "Set hardware acceleration to %s", _hardware ? "enabled" : "disabled");
+
+		if (_initialized && !_blocked)
+		{
+			Debug(_log, "Restarting video grabber");
+			uninit();
+			start();
+		}
+		else
+		{
+			Info(_log, "Delayed restart of the grabber due to change of the hardware acceleration");
+			_restartNeeded = true;
+		}
+	}
 }
 
 bool Grabber::trySetInput(int input)
@@ -518,6 +552,32 @@ int Grabber::getTargetSystemFrameDimension(int& targetSizeX, int& targetSizeY)
 	return divide;
 }
 
+int Grabber::getTargetSystemFrameDimension(int actualWidth, int actualHeight, int& targetSizeX, int& targetSizeY)
+{
+	int realSizeX = actualWidth;
+	int realSizeY = actualHeight;
+
+	if (realSizeX <= 16 || realSizeY <= 16)
+	{
+		realSizeX = actualWidth;
+		realSizeY = actualHeight;
+	}
+
+	int checkWidth = realSizeX;
+	int divide = 1;
+
+	while (checkWidth > _width)
+	{
+		divide++;
+		checkWidth = realSizeX / divide;
+	}
+
+	targetSizeX = realSizeX / divide;
+	targetSizeY = realSizeY / divide;
+
+	return divide;
+}
+
 void Grabber::processSystemFrameBGRA(uint8_t* source, int lineSize, bool useLut)
 {
 	int targetSizeX, targetSizeY;

Diff for: sources/grabber/linux/v4l2/V4L2Grabber.cpp

@@ -69,6 +69,9 @@ static const V4L2Grabber::HyperHdrFormat supportedFormats[] =
 	{ V4L2_PIX_FMT_YUV420, PixelFormat::I420 },
 	{ V4L2_PIX_FMT_NV12,   PixelFormat::NV12 },
 	{ V4L2_PIX_FMT_MJPEG,  PixelFormat::MJPEG }
+	#ifdef V4L2_PIX_FMT_P010
+		,{ V4L2_PIX_FMT_P010,  PixelFormat::P010 }
+	#endif
 };