Detailed Description

GPU RGBA->YUY2 encoder (packed 4:2:2, NTV2_FBF_8BIT_YCBCR_YUY2).

Identical to UYVYEncoder except the output byte order is Y0, Cb, Y1, Cr (YUY2 / YUYV) instead of Cb, Y0, Cr, Y1 (UYVY / 2vuy). Output is an RGBA8 texture at half width; each texel encodes 2 source pixels.

Public Member Functions
void	init (QRhi &rhi, const RenderState &state, QRhiTexture *inputRGBA, int width, int height, const QString &colorConversion=colorMatrixOut()) override

void	exec (QRhi &rhi, QRhiCommandBuffer &cb) override

int	planeCount () const override
	Number of readback planes (1 for UYVY, 2 for NV12, 3 for I420).

const QRhiReadbackResult &	readback (int) const override
	Get the readback result for a given plane. Valid after endOffscreenFrame.

void	release () override
	Release all GPU resources.

Public Member Functions inherited from score::gfx::GPUVideoEncoder
virtual QRhiTexture *	outputTexture () const noexcept

virtual void	setReadbackEnabled (bool) noexcept

Public Attributes
QRhiTexture *	m_outTexture {}

QRhiTextureRenderTarget *	m_renderTarget {}

QRhiRenderPassDescriptor *	m_rpDesc {}

QRhiSampler *	m_sampler {}

QRhiShaderResourceBindings *	m_srb {}

QRhiGraphicsPipeline *	m_pipeline {}

QRhiReadbackResult	m_readback {}

int	m_width {}

int	m_height {}

Static Public Attributes
static constexpr const char *	frag

Static Public Attributes inherited from score::gfx::GPUVideoEncoder
static constexpr const char *	vertex_shader

static constexpr const char *	rgb_to_yuv_glsl

static constexpr const char *	y_flip_glsl
	Fragment shader Y-flip: on GL, flip v_texcoord.y. On Metal/HLSL, no flip.

Member Function Documentation

◆ exec()

void score::gfx::YUY2Encoder::exec	(	QRhi &	rhi,
		QRhiCommandBuffer &	cb
	)

inlineoverridevirtual

Execute the conversion pass. Call inside beginOffscreenFrame/endOffscreenFrame. Renders the conversion shader and schedules GPU->CPU readback(s).

Implements score::gfx::GPUVideoEncoder.

◆ init()

void score::gfx::YUY2Encoder::init	(	QRhi &	rhi,
		const RenderState &	state,
		QRhiTexture *	inputRGBA,
		int	width,
		int	height,
		const QString &	colorConversion = `colorMatrixOut()`
	)

inlineoverridevirtual

Create render targets, textures, samplers, and the graphics pipeline.

Parameters

rhi	The QRhi instance.
state	The render state (for shader compilation).
inputRGBA	The scene RGBA texture to read from.
width	Source width in pixels.
height	Source height in pixels.
colorConversion	GLSL code from colorMatrixOut() defining convert_from_rgb(). If empty, defaults to BT.709 full range.