vaapi_context Struct Reference
[VA API Decoding]

This structure is used to share data between the FFmpeg library and the client video application. More...

#include <vaapi.h>

Data Fields
void *	display
	Window system dependent data.
uint32_t	config_id
	Configuration ID.
uint32_t	context_id
	Context ID (video decode pipeline).
uint32_t	pic_param_buf_id
	VAPictureParameterBuffer ID.
uint32_t	iq_matrix_buf_id
	VAIQMatrixBuffer ID.
uint32_t	bitplane_buf_id
	VABitPlaneBuffer ID (for VC-1 decoding).
uint32_t *	slice_buf_ids
	Slice parameter/data buffer IDs.
unsigned int	n_slice_buf_ids
	Number of effective slice buffer IDs to send to the HW.
unsigned int	slice_buf_ids_alloc
	Size of pre-allocated slice_buf_ids.
void *	slice_params
	Pointer to VASliceParameterBuffers.
unsigned int	slice_param_size
	Size of a VASliceParameterBuffer element.
unsigned int	slice_params_alloc
	Size of pre-allocated slice_params.
unsigned int	slice_count
	Number of slices currently filled in.
const uint8_t *	slice_data
	Pointer to slice data buffer base encoding: unused decoding: Set by libavcodec.
uint32_t	slice_data_size
	Current size of slice data.

---

Detailed Description

This structure is used to share data between the FFmpeg library and the client video application.

This shall be zero-allocated and available as AVCodecContext.hwaccel_context. All user members can be set once during initialization or through each AVCodecContext.get_buffer() function call. In any case, they must be valid prior to calling decoding functions.

Definition at line 44 of file vaapi.h.

---

Field Documentation

uint32_t vaapi_context::bitplane_buf_id

VABitPlaneBuffer ID (for VC-1 decoding).

• encoding: unused
• decoding: Set by libavcodec

Definition at line 91 of file vaapi.h.

Referenced by ff_vaapi_alloc_bitplane(), ff_vaapi_common_end_frame(), and render_picture().

uint32_t vaapi_context::config_id

Configuration ID.

• encoding: unused
• decoding: Set by user

Definition at line 59 of file vaapi.h.

uint32_t vaapi_context::context_id

Context ID (video decode pipeline).

• encoding: unused
• decoding: Set by user

Definition at line 67 of file vaapi.h.

Referenced by alloc_buffer(), commit_slices(), and render_picture().

void* vaapi_context::display

Window system dependent data.

• encoding: unused
• decoding: Set by user

Definition at line 51 of file vaapi.h.

Referenced by alloc_buffer(), commit_slices(), ff_vaapi_common_end_frame(), and render_picture().

uint32_t vaapi_context::iq_matrix_buf_id

VAIQMatrixBuffer ID.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 83 of file vaapi.h.

Referenced by ff_vaapi_alloc_iq_matrix(), ff_vaapi_common_end_frame(), and render_picture().

unsigned int vaapi_context::n_slice_buf_ids

Number of effective slice buffer IDs to send to the HW.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 107 of file vaapi.h.

Referenced by commit_slices(), ff_vaapi_common_end_frame(), and render_picture().

uint32_t vaapi_context::pic_param_buf_id

VAPictureParameterBuffer ID.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 75 of file vaapi.h.

Referenced by ff_vaapi_alloc_pic_param(), ff_vaapi_common_end_frame(), and render_picture().

uint32_t* vaapi_context::slice_buf_ids

Slice parameter/data buffer IDs.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 99 of file vaapi.h.

Referenced by commit_slices(), ff_vaapi_common_end_frame(), and render_picture().

unsigned int vaapi_context::slice_buf_ids_alloc

Size of pre-allocated slice_buf_ids.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 115 of file vaapi.h.

Referenced by commit_slices(), and ff_vaapi_common_end_frame().

unsigned int vaapi_context::slice_count

Number of slices currently filled in.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 147 of file vaapi.h.

Referenced by commit_slices(), ff_vaapi_alloc_slice(), and ff_vaapi_common_end_frame().

const uint8_t* vaapi_context::slice_data

Pointer to slice data buffer base

• encoding: unused
• decoding: Set by libavcodec.

Definition at line 154 of file vaapi.h.

Referenced by commit_slices(), and ff_vaapi_alloc_slice().

uint32_t vaapi_context::slice_data_size

Current size of slice data.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 162 of file vaapi.h.

Referenced by commit_slices(), and ff_vaapi_alloc_slice().

unsigned int vaapi_context::slice_param_size

Size of a VASliceParameterBuffer element.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 131 of file vaapi.h.

Referenced by commit_slices(), ff_vaapi_alloc_slice(), start_frame(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_start_frame(), and vaapi_vc1_start_frame().

void* vaapi_context::slice_params

Pointer to VASliceParameterBuffers.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 123 of file vaapi.h.

Referenced by commit_slices(), ff_vaapi_alloc_slice(), and ff_vaapi_common_end_frame().

unsigned int vaapi_context::slice_params_alloc

Size of pre-allocated slice_params.

• encoding: unused
• decoding: Set by libavcodec

Definition at line 139 of file vaapi.h.

Referenced by ff_vaapi_alloc_slice(), and ff_vaapi_common_end_frame().

---

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

• libavcodec/vaapi.h