drmbuffer.cpp File Reference

DRM Buffer. More...

#include <cstdint>
#include <fcntl.h>
#include <sys/mman.h>
#include <libavutil/frame.h>
#include <libavutil/hwcontext_drm.h>
#include <drm_fourcc.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "drmbuffer.h"
#include "logger.h"
#include "pool.h"

Go to the source code of this file.

Macros
#define	ARRAY_SIZE(arr)   (sizeof(arr) / sizeof((arr)[0]))

Functions
const struct format_info *	FindFormat (uint32_t format)
	Find infos for the given pixel format.

Variables
static const struct format_info	format_info_array []
	Holds the infos of a pixel format.

Detailed Description

DRM Buffer.

This files defines cDrmBuffer, which is a class used to describe a DRM buffer, keeping framebuffer and prime handles to be used by the kernel display interface.

Copyright

2018 by zille. All Rights Reserved.

2025 - 2026 by Andreas Baierl. All Rights Reserved.

License

AGPL-3.0-or-later

Definition in file drmbuffer.cpp.

Macro Definition Documentation

ARRAY_SIZE

#define ARRAY_SIZE

(

arr

)

(sizeof(arr) / sizeof((arr)[0]))

Definition at line 232 of file drmbuffer.cpp.

Function Documentation

FindFormat()

const struct format_info * FindFormat

(

uint32_t

format

)

Find infos for the given pixel format.

Parameters

format

pixel format

Returns

the infos of the format as a struct

Definition at line 241 of file drmbuffer.cpp.

References ARRAY_SIZE, format_info::format, and format_info_array.

Referenced by cDrmBuffer::Setup().

Variable Documentation

format_info_array

const struct format_info format_info_array[]

static

Initial value:

= {
    { DRM_FORMAT_NV12, "NV12", 2, { { 8, 1, 1 }, { 16, 2, 2 } }, },
    { DRM_FORMAT_YUV420, "YU12", 3, { { 8, 1, 1 }, { 8, 2, 2 }, {8, 2, 2 } }, },
    { DRM_FORMAT_ARGB8888, "AR24", 1, { { 32, 1, 1 } }, },
}

Holds the infos of a pixel format.

Each entry describes a format in the following matter: { uint32_t format, const char *fourcc, uint8_t num_planes, struct format_plane_info planes[4] }

The format_plane_info is: { uint8_t bitspp, uint8_t xsub, uint8_t ysub, }

Definition at line 226 of file drmbuffer.cpp.

Referenced by FindFormat().