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#ifndef NAL_PARSER_H_
#define NAL_PARSER_H_
#include <stdlib.h>
#include "xine_internal.h"
enum nal_unit_types {
NAL_UNSPECIFIED = 0,
NAL_SLICE,
NAL_PART_A,
NAL_PART_B,
NAL_PART_C,
NAL_SLICE_IDR,
NAL_SEI,
NAL_SPS,
NAL_PPS,
NAL_AU_DELIMITER,
NAL_END_OF_SEQUENCE,
NAL_END_OF_STREAM,
NAL_FILLER_DATA,
NAL_SPS_EXT
};
/* default scaling_lists according to Table 7-2 */
uint8_t default_4x4_intra[16] =
{ 6, 13, 13, 20, 20, 20, 28, 28, 28, 28, 32, 32, 32, 37, 37, 42 };
uint8_t default_4x4_inter[16] =
{ 10, 14, 14, 20, 20, 20, 24, 24, 24, 24, 27, 27, 27, 30, 30, 34};
uint8_t default_8x8_intra[64] =
{ 6, 10, 10, 13, 11, 13, 16, 16, 16, 16, 18, 18, 18, 18, 18, 32,
23, 23, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 27, 27, 27, 27,
27, 27, 27, 27, 29, 29, 29, 29, 29, 29, 29, 31, 31, 31, 31, 31,
31, 33, 33, 33, 33, 33, 36, 36, 36, 36, 38, 38, 38, 40, 40, 42 };
uint8_t default_8x8_inter[64] =
{ 9, 13, 13, 15, 13, 15, 17, 17, 17, 17, 19, 19, 19, 19, 19, 21,
21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22, 22, 24, 24, 24, 24,
24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 27, 27, 27, 27, 27,
27, 28, 28, 28, 28, 28, 30, 30, 30, 30, 32, 32, 32, 33, 33, 35 };
struct nal_unit {
uint8_t nal_ref_idc; // 0x03
uint8_t nal_unit_type; // 0x1f
struct seq_parameter_set_rbsp *sps;
struct pic_parameter_set_rbsp *pps;
struct slice_header *slc;
};
struct seq_parameter_set_rbsp {
uint8_t profile_idc; // 0xff
uint8_t constraint_setN_flag; // 0x0f
uint8_t level_idc; // 0xff
uint32_t seq_parameter_set_id;
uint32_t chroma_format_idc;
uint8_t residual_colour_transform_flag; // 0x01
uint32_t bit_depth_luma_minus8;
uint32_t bit_depth_chroma_minus8;
uint8_t qpprime_y_zero_transform_bypass_flag;
uint8_t seq_scaling_matrix_present_flag;
/* if(seq_scaling_matrix_present_flag) */
{
uint8_t seq_scaling_list_present_flag[8];
uint8_t scaling_lists_4x4[6][16];
uint8_t scaling_lists_8x8[2][64];
}
uint32_t log2_max_frame_num_minus4;
uint32_t pic_order_cnt_type;
// if pic_order_cnt_type==0
uint32_t log2_max_pic_order_cnt_lsb_minus4;
// else
uint8_t delta_pic_order_always_zero_flag;
int32_t offset_for_non_ref_pic;
int32_t offset_for_top_to_bottom_field;
uint8_t num_ref_frames_in_pic_order_cnt_cycle;
int32_t offset_for_ref_frame[256];
// TODO: some more ignored here
uint32_t num_ref_frames;
uint8_t gaps_in_frame_num_value_allowed_flag;
/*uint32_t pic_width_in_mbs_minus1;
uint32_t pic_height_in_map_units_minus1;*/
uint32_t pic_width;
uint32_t pic_height;
uint8_t frame_mbs_only_flag;
uint8_t mb_adaptive_frame_field_flag;
uint8_t direct_8x8_inference_flag;
uint8_t frame_cropping_flag;
uint32_t frame_crop_left_offset;
uint32_t frame_crop_right_offset;
uint32_t frame_crop_top_offset;
uint32_t frame_crop_bottom_offset;
uint8_t vui_parameters_present_flag;
// TODO: add vui_parameters, rtbsp_trailing_bits
};
struct pic_parameter_set_rbsp {
uint32_t pic_parameter_set_id;
uint32_t seq_parameter_set_id;
uint8_t entropy_coding_mode_flag;
uint8_t pic_order_present_flag;
uint32_t num_slice_groups_minus1;
/* num_slice_groups_minus1 > 0 */
{
uint32_t slice_group_map_type;
/* slice_group_map_type == 1 */
{
uint32_t run_length_minus1[64];
}
/* slice_group_map_type == 2 */
{
uint32_t top_left[64];
uint32_t bottom_right[64];
}
/* slice_group_map_type == 3,4,5 */
{
uint8_t slice_group_change_direction_flag;
uint32_t slice_group_change_rate_minus1;
}
/* slice_group_map_type == 6 */
{
uint32_t pic_size_in_map_units_minus1;
uint8_t slice_group_id[64];
}
}
uint32_t num_ref_idx_l0_active_minus1;
uint32_t num_ref_idx_l1_active_minus1;
uint8_t weighted_pred_flag;
uint8_t weighted_bipred_idc;
int32_t pic_init_qp_minus26;
int32_t pic_init_qs_minus26;
int32_t chroma_qp_index_offset;
uint8_t deblocking_filter_control_present_flag;
uint8_t constrained_intra_pred_flag;
uint8_t redundant_pic_cnt_present_flag;
/* if(more_rbsp_data) */
uint8_t transform_8x8_mode_flag;
uint8_t pic_scaling_matrix_present_flag;
/* if(pic_scaling_matrix_present_flag) */
{
uint8_t pic_scaling_list_present_flag[8];
uint8_t scaling_lists_4x4[6][16];
uint8_t scaling_lists_8x8[2][64];
int32_t second_chroma_qp_index_offset;
}
};
struct slice_header {
uint32_t first_mb_in_slice;
uint32_t slice_type;
uint32_t pic_parameter_set_id;
uint32_t frame_num;
int8_t field_pic_flag;
int8_t bottom_field_flag;
uint32_t idr_pic_id;
/* sps->pic_order_cnt_type == 0 */
uint32_t pic_order_cnt_lsb;
int32_t delta_pic_order_cnt_bottom;
/* sps->pic_order_cnt_type == 1 && !sps->delta_pic_order_always_zero_flag */
int32_t delta_pic_order_cnt[2];
/* not needed for packetizing */
/*int32_t redundant_pic_cnt;
uint8_t direct_spatial_mv_pred_flag;*/
};
#define MAX_FRAME_SIZE 1024*1024
struct nal_parser {
uint8_t buf[MAX_FRAME_SIZE];
int buf_len;
int found_sps;
int found_pps;
int last_nal_res;
int field; /* 0=top, 1=bottom, -1=both */
int slice;
int slice_cnt;
int have_top;
int have_frame;
struct nal_unit *nal0;
struct nal_unit *nal1;
struct nal_unit *current_nal;
struct nal_unit *last_nal;
};
int parse_nal(uint8_t *buf, int buf_len, struct nal_parser *parser);
int seek_for_nal(uint8_t *buf, int buf_len);
struct nal_parser* init_parser();
void free_parser(struct nal_parser *parser);
int parse_frame(struct nal_parser *parser, uint8_t *inbuf, int inbuf_len,
uint8_t **ret_buf, int *ret_len);
#endif
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