VADecPictureParameterBufferVP9 Struct Reference

VP9 Decoding Picture Parameter Buffer Structure. More...

#include <va_dec_vp9.h>

Public Attributes
uint16_t	frame_width
	picture width Picture original resolution. The value may not be multiple of 8.
uint16_t	frame_height
	picture height Picture original resolution. The value may not be multiple of 8.
VASurfaceID	reference_frames [8]
	Surface indices of reference frames in DPB. More...
uint8_t	log2_tile_rows
	number of tile rows specified by (1 << log2_tile_rows). It corresponds the variable with same name in VP9 code.
uint8_t	log2_tile_columns
	number of tile columns specified by (1 << log2_tile_columns). It corresponds the variable with same name in VP9 code.
uint8_t	frame_header_length_in_bytes
	Number of bytes taken up by the uncompressed frame header, which corresponds to byte length of function read_uncompressed_header() in VP9 code. Specifically, it is the byte count from bit stream buffer start to the last byte of uncompressed frame header. If there are other meta data in the buffer before uncompressed header, its size should be also included here.
uint16_t	first_partition_size
	The byte count of compressed header the bitstream buffer, which corresponds to syntax first_partition_size in code.
uint8_t	mb_segment_tree_probs [7]
uint8_t	profile
	VP9 Profile definition value range [0..3].
uint8_t	bit_depth
	VP9 bit depth per sample same for both luma and chroma samples.
uint32_t	va_reserved [VA_PADDING_MEDIUM]
	Reserved bytes for future use, must be zero.
uint32_t	subsampling_x: 1
	flags for current picture same syntax and semantic as those in VP9 code
uint32_t	segmentation_temporal_update: 1
	corresponds to variable temporal_update in VP9 code.
uint32_t	segmentation_update_map: 1
	corresponds to variable update_mb_segmentation_map in VP9 code.
uint32_t	last_ref_frame: 3
	Index of reference_frames[] and points to the LAST reference frame. It corresponds to active_ref_idx[0] in VP9 code.
uint32_t	last_ref_frame_sign_bias: 1
	Sign Bias of the LAST reference frame. It corresponds to ref_frame_sign_bias[LAST_FRAME] in VP9 code.
uint32_t	golden_ref_frame: 3
	Index of reference_frames[] and points to the GOLDERN reference frame. It corresponds to active_ref_idx[1] in VP9 code.
uint32_t	golden_ref_frame_sign_bias: 1
	Sign Bias of the GOLDERN reference frame. Corresponds to ref_frame_sign_bias[GOLDERN_FRAME] in VP9 code.
uint32_t	alt_ref_frame: 3
	Index of reference_frames[] and points to the ALTERNATE reference frame. Corresponds to active_ref_idx[2] in VP9 code.
uint32_t	alt_ref_frame_sign_bias: 1
	Sign Bias of the ALTERNATE reference frame. Corresponds to ref_frame_sign_bias[ALTREF_FRAME] in VP9 code.
uint32_t	lossless_flag: 1
	Lossless Mode LosslessFlag = base_qindex == 0 && y_dc_delta_q == 0 && uv_dc_delta_q == 0 && uv_ac_delta_q == 0; Where base_qindex, y_dc_delta_q, uv_dc_delta_q and uv_ac_delta_q are all variables in VP9 code.

Detailed Description

VP9 Decoding Picture Parameter Buffer Structure.

This structure conveys picture level parameters. App should send a surface with this data structure down to VAAPI once per frame.

Member Data Documentation

mb_segment_tree_probs

uint8_t VADecPictureParameterBufferVP9::mb_segment_tree_probs[7]

These values are segment probabilities with same names in VP9 function setup_segmentation(). They should be parsed directly from bitstream by application.

reference_frames

VASurfaceID VADecPictureParameterBufferVP9::reference_frames[8]

Surface indices of reference frames in DPB.

Each entry of the list specifies the surface index of the picture that is referred by current picture or will be referred by any future picture. Application who calls this API should update this list based on the refreshing information from VP9 bitstream.

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

• va_dec_vp9.h