[Libav-user] extradata

[Alex]

Hi, I develop decoder that  use NVidia CUDA thechnology.
And I have problems, for decode frame on CUDA I need fill and parse same struc first to CUDA decoder.
But I don't  understend where and how I can get params for my struc. Can you help me?

This is struc for h264 video:
http://graphics.im.ntu.edu.tw/~bossliaw/nvCuda_doxygen/html/struct___c_u_v_i_d_h264_p_i_c_p_a_r_a_m_s.html

int 	log2_max_frame_num_minus4
int 	pic_order_cnt_type
int 	log2_max_pic_order_cnt_lsb_minus4
int 	delta_pic_order_always_zero_flag
int 	frame_mbs_only_flag
int 	direct_8x8_inference_flag
int 	num_ref_frames
unsigned char 	residual_colour_transform_flag
unsigned char 	bit_depth_luma_minus8
unsigned char 	bit_depth_chroma_minus8
unsigned char 	qpprime_y_zero_transform_bypass_flag
int 	entropy_coding_mode_flag
int 	pic_order_present_flag
int 	num_ref_idx_l0_active_minus1
int 	num_ref_idx_l1_active_minus1
int 	weighted_pred_flag
int 	weighted_bipred_idc
int 	pic_init_qp_minus26
int 	deblocking_filter_control_present_flag
int 	redundant_pic_cnt_present_flag
int 	transform_8x8_mode_flag
int 	MbaffFrameFlag
int 	constrained_intra_pred_flag
int 	chroma_qp_index_offset
int 	second_chroma_qp_index_offset
int 	ref_pic_flag
int 	frame_num
int 	CurrFieldOrderCnt [2]
CUVIDH264DPBENTRY 	dpb [16]
unsigned char 	WeightScale4x4 [6][16]
unsigned char 	WeightScale8x8 [2][64]
unsigned char 	fmo_aso_enable
unsigned char 	num_slice_groups_minus1
unsigned char 	slice_group_map_type
signed char 	pic_init_qs_minus26
unsigned int 	slice_group_change_rate_minus1
union {
   unsigned long long   slice_group_map_addr
   const unsigned char *   pMb2SliceGroupMap
} 	fmo
unsigned int 	Reserved [12]
union {
   CUVIDH264MVCEXT   mvcext
   CUVIDH264SVCEXT   svcext
};