vulkan_encode.cpp File Reference

Vulkan-native encoder: DMA-BUF -> Vulkan compute (RGB->YUV) -> Vulkan Video encode. No EGL/GL dependency — all GPU work stays in a single Vulkan queue. More...

#include <algorithm>
#include <array>
#include <cstdint>
#include <drm_fourcc.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
#include <vector>
#include <vulkan/vulkan.h>
#include <libavcodec/avcodec.h>
#include <libavutil/hwcontext.h>
#include <libavutil/hwcontext_vulkan.h>
#include "graphics.h"
#include "src/config.h"
#include "src/logging.h"
#include "src/video_colorspace.h"
#include "vulkan_encode.h"
#include "shaders/rgb2yuv.spv.inc"

Include dependency graph for vulkan_encode.cpp:

Classes
struct	vk::PushConstants
	Vulkan shader constants used by the conversion pass. More...
class	vk::vk_vram_t
	Vulkan encode device that keeps converted frames in GPU memory. More...

Macros
#define	VK_CHECK(expr)
	Macro for VK CHECK.
#define	VK_CHECK_BOOL(expr)
	Macro for VK CHECK BOOL.

Functions
std::unique_ptr< platf::avcodec_encode_device_t >	vk::make_avcodec_encode_device_ram (int width, int height)
	Create a Vulkan encode device for RAM capture.
std::unique_ptr< platf::avcodec_encode_device_t >	vk::make_avcodec_encode_device_vram (int width, int height, int offset_x, int offset_y)
	Create a Vulkan encode device for VRAM capture.
bool	vk::validate ()
	Check if FFmpeg Vulkan Video encoding is available.
int	vk::vulkan_init_avcodec_hardware_input_buffer (platf::avcodec_encode_device_t *encode_device, AVBufferRef **hw_device_buf)
	Initialize Vulkan hardware device for FFmpeg encoding.

Detailed Description

Vulkan-native encoder: DMA-BUF -> Vulkan compute (RGB->YUV) -> Vulkan Video encode. No EGL/GL dependency — all GPU work stays in a single Vulkan queue.

Macro Definition Documentation

VK_CHECK

#define VK_CHECK

(

expr

)

Value:

  do { \
    VkResult _r = (expr); \
    if (_r != VK_SUCCESS) { \
      BOOST_LOG(error) << #expr << " failed: " << _r; \
      return -1; \
    } \
  } while (0)

Macro for VK CHECK.

VK_CHECK_BOOL

#define VK_CHECK_BOOL

(

expr

)

Value:

  do { \
    VkResult _r = (expr); \
    if (_r != VK_SUCCESS) { \
      BOOST_LOG(error) << #expr << " failed: " << _r; \
      return false; \
    } \
  } while (0)

Macro for VK CHECK BOOL.

Function Documentation

make_avcodec_encode_device_ram()

std::unique_ptr< platf::avcodec_encode_device_t > vk::make_avcodec_encode_device_ram	(	int	width,
		int	height )

Create a Vulkan encode device for RAM capture.

Parameters

width	Frame or display width in pixels.
height	Frame or display height in pixels.

Returns

Constructed AVCodec encode device ram object.

make_avcodec_encode_device_vram()

std::unique_ptr< platf::avcodec_encode_device_t > vk::make_avcodec_encode_device_vram	(	int	width,
		int	height,
		int	offset_x,
		int	offset_y )

Create a Vulkan encode device for VRAM capture.

Parameters

width	Frame or display width in pixels.
height	Frame or display height in pixels.
offset_x	Offset x.
offset_y	Offset y.

Returns

Constructed AVCodec encode device VRAM object.

validate()

bool vk::validate

(

)

Check if FFmpeg Vulkan Video encoding is available.

Returns

True when FFmpeg Vulkan Video encoding is available.

vulkan_init_avcodec_hardware_input_buffer()

int vk::vulkan_init_avcodec_hardware_input_buffer	(	platf::avcodec_encode_device_t *	encode_device,
		AVBufferRef **	hw_device_buf )

Initialize Vulkan hardware device for FFmpeg encoding.

Parameters

encode_device	The encode device (vk_t).
hw_device_buf	Output hardware device buffer.

Returns

0 on success, negative on error.