grab.cpp File Reference

Grabbing Interface. More...

#include <libavutil/imgutils.h>
#include <libswscale/swscale.h>
#include <sys/mman.h>
#include <drm_fourcc.h>
#include "drmbuffer.h"
#include "grab.h"
#include "logger.h"
#include "videorender.h"

Go to the source code of this file.

Macros
#define	OPAQUE   0xff
#define	TRANSPARENT   0x00
#define	UNMULTIPLY(color, alpha)   ((0xff * color) / alpha)
#define	BLEND(back, front, alpha)   ((front * alpha) + (back * (255 - alpha))) / 255

Functions
void	Sand128ToPlanarY8 (uint8_t *dst, const unsigned int dstStride, const uint8_t *src, unsigned int stride1, unsigned int stride2, unsigned int w, unsigned int h)
	Convert the luma (Y plane) from SAND to linear buffer (8bit)
static void	Sand30ToPlanarY16 (uint8_t *dst, const unsigned int dstStride, const uint8_t *src, unsigned int stride1, unsigned int stride2, unsigned int w, unsigned int h)
	Convert the luma (Y plane) from SAND to linear buffer (10bit)
static void	Sand30ToPlanarC16 (uint8_t *dstU, const unsigned int dstStrideU, uint8_t *dstV, const unsigned int dstStrideV, const uint8_t *src, unsigned int stride1, unsigned int stride2, unsigned int w, unsigned int h)
	Convert the chroma (UV plane) from SAND to linear buffer (10bit)
enum AVPixelFormat	DrmFormatToAVFormat (uint32_t pixFmt)
	Convert a DRM format to a ffmpeg AV format.
static uint8_t *	ScaleRgb24 (uint8_t *src, int *size, int srcW, int srcH, int dstW, int dstH)
	Scale an image.
static void	AlphaBlend (uint8_t *result, uint8_t *front, uint8_t *back, const unsigned int width, const unsigned int height)
	Blend two images.
static int	BlitVideo (uint8_t *dst, uint8_t *src, int dstW, int dstH, int dstX, int dstY, int srcW, int srcH)
	Blit the video on black background.
uint8_t *	CreateJpeg (uint8_t *image, int *size, int quality, int width, int height)
	Call rgb to jpeg for C Plugin.

Detailed Description

Grabbing Interface.

This file defines cGrabBuffer and cSoftHdGrab, which are used to handle grab requests.

This file contains code under multiple licenses:

• Raspberry Pi code: BSD-3-Clause
• Remaining code: AGPL-3.0-or-later

Copyright

2025 - 2026 by Andreas Baierl. All Rights Reserved.

License

AGPL-3.0-or-later

Definition in file grab.cpp.