score::gfx::DXVDecoder Struct Reference

Decodes DXV DXT1/DXT5 (Resolume) format to GPU. More...

Inheritance diagram for score::gfx::DXVDecoder:

Detailed Description

Decodes DXV DXT1/DXT5 (Resolume) format to GPU.

DXV stores GPU-compressed texture data (BC1/BC3 blocks) with an intermediate compression layer (DXTR opcodes, LZF, or raw). We bypass ffmpeg's CPU decompression and upload raw BC blocks directly to the GPU.

Classes
struct	PacketHeader

Public Types
enum	DXVFormat : uint32_t { FMT_DXT1 = 0x44585431 , FMT_DXT5 = 0x44585435 , FMT_YCG6 = 0x59434736 , FMT_YG10 = 0x59473130 }

Public Member Functions
	DXVDecoder (QRhiTexture::Format fmt, Video::ImageFormat &d, QString filter="")
std::pair< QShader, QShader >	init (RenderList &r) override
	Initialize a GPUVideoDecoder.
void	exec (RenderList &, QRhiResourceUpdateBatch &res, AVFrame &frame) override
	Decode and upload a video frame to the GPU.
Public Member Functions inherited from score::gfx::GPUVideoDecoder
void	release (RenderList &)
	This method will release all the created samplers and textures.

Static Public Member Functions
static PacketHeader	parseHeader (const uint8_t *pkt, int pktSize)
Static Public Member Functions inherited from score::gfx::GPUVideoDecoder
static QRhiTextureSubresourceUploadDescription	createTextureUpload (uint8_t *pixels, int w, int h, int bytesPerPixel, int stride)
	Utility method to create a QRhiTextureSubresourceUploadDescription.
static QString	vertexShader (bool invertY=false) noexcept

Additional Inherited Members
Public Attributes inherited from score::gfx::GPUVideoDecoder
std::vector< Sampler >	samplers

Member Function Documentation

exec()

void score::gfx::DXVDecoder::exec ( RenderList &  , QRhiResourceUpdateBatch &  res, AVFrame &  frame  )

overridevirtual

Decode and upload a video frame to the GPU.

Implements score::gfx::GPUVideoDecoder.

init()

std::pair< QShader, QShader > score::gfx::DXVDecoder::init ( RenderList &  r )

overridevirtual

Initialize a GPUVideoDecoder.

This method must :

• Create samplers and textures for the video format.
• Create shaders that will render the data put into these textures.

It returns a {vertex, fragment} shader pair.

Implements score::gfx::GPUVideoDecoder.

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The documentation for this struct was generated from the following files:

• DXV.hpp
• DXV.cpp