Functions
GST_H264_IS_P_SLICE()
#define GST_H264_IS_P_SLICE(slice) (((slice)->type % 5) == GST_H264_P_SLICE)
GST_H264_IS_B_SLICE()
#define GST_H264_IS_B_SLICE(slice) (((slice)->type % 5) == GST_H264_B_SLICE)
GST_H264_IS_I_SLICE()
#define GST_H264_IS_I_SLICE(slice) (((slice)->type % 5) == GST_H264_I_SLICE)
GST_H264_IS_SP_SLICE()
#define GST_H264_IS_SP_SLICE(slice) (((slice)->type % 5) == GST_H264_SP_SLICE)
GST_H264_IS_SI_SLICE()
#define GST_H264_IS_SI_SLICE(slice) (((slice)->type % 5) == GST_H264_SI_SLICE)
Types and Values
GST_H264_MAX_SPS_COUNT
#define GST_H264_MAX_SPS_COUNT 32
GST_H264_MAX_PPS_COUNT
#define GST_H264_MAX_PPS_COUNT 256
enum GstH264SEIPayloadType
enum GstH264SEIPicStructType
struct GstH264NalParser
struct GstH264NalParser {
};
struct GstH264NalUnit
struct GstH264NalUnit {
guint16 ref_idc;
guint16 type;
/* calculated values */
guint8 idr_pic_flag;
guint size;
guint offset;
guint sc_offset;
gboolean valid;
guint8 *data;
};
struct GstH264SPS
struct GstH264SPS {
gint id;
guint8 profile_idc;
guint8 constraint_set0_flag;
guint8 constraint_set1_flag;
guint8 constraint_set2_flag;
guint8 constraint_set3_flag;
guint8 level_idc;
guint8 chroma_format_idc;
guint8 separate_colour_plane_flag;
guint8 bit_depth_luma_minus8;
guint8 bit_depth_chroma_minus8;
guint8 qpprime_y_zero_transform_bypass_flag;
guint8 scaling_matrix_present_flag;
guint8 scaling_lists_4x4[6][16];
guint8 scaling_lists_8x8[6][64];
guint8 log2_max_frame_num_minus4;
guint8 pic_order_cnt_type;
/* if pic_order_cnt_type == 0 */
guint8 log2_max_pic_order_cnt_lsb_minus4;
/* else if pic_order_cnt_type == 1 */
guint8 delta_pic_order_always_zero_flag;
gint32 offset_for_non_ref_pic;
gint32 offset_for_top_to_bottom_field;
guint8 num_ref_frames_in_pic_order_cnt_cycle;
gint32 offset_for_ref_frame[255];
guint32 num_ref_frames;
guint8 gaps_in_frame_num_value_allowed_flag;
guint32 pic_width_in_mbs_minus1;
guint32 pic_height_in_map_units_minus1;
guint8 frame_mbs_only_flag;
guint8 mb_adaptive_frame_field_flag;
guint8 direct_8x8_inference_flag;
guint8 frame_cropping_flag;
/* if frame_cropping_flag */
guint32 frame_crop_left_offset;
guint32 frame_crop_right_offset;
guint32 frame_crop_top_offset;
guint32 frame_crop_bottom_offset;
guint8 vui_parameters_present_flag;
/* if vui_parameters_present_flag */
GstH264VUIParams vui_parameters;
/* calculated values */
guint8 chroma_array_type;
guint32 max_frame_num;
gint width, height;
gint fps_num, fps_den;
gboolean valid;
};
struct GstH264PPS
struct GstH264PPS {
gint id;
GstH264SPS *sequence;
guint8 entropy_coding_mode_flag;
guint8 pic_order_present_flag;
guint32 num_slice_groups_minus1;
/* if num_slice_groups_minus1 > 0 */
guint8 slice_group_map_type;
/* and if slice_group_map_type == 0 */
guint32 run_length_minus1[8];
/* or if slice_group_map_type == 2 */
guint32 top_left[8];
guint32 bottom_right[8];
/* or if slice_group_map_type == (3, 4, 5) */
guint8 slice_group_change_direction_flag;
guint32 slice_group_change_rate_minus1;
/* or if slice_group_map_type == 6 */
guint32 pic_size_in_map_units_minus1;
guint8 *slice_group_id;
guint8 num_ref_idx_l0_active_minus1;
guint8 num_ref_idx_l1_active_minus1;
guint8 weighted_pred_flag;
guint8 weighted_bipred_idc;
gint8 pic_init_qp_minus26;
gint8 pic_init_qs_minus26;
gint8 chroma_qp_index_offset;
guint8 deblocking_filter_control_present_flag;
guint8 constrained_intra_pred_flag;
guint8 redundant_pic_cnt_present_flag;
guint8 transform_8x8_mode_flag;
guint8 scaling_lists_4x4[6][16];
guint8 scaling_lists_8x8[6][64];
guint8 second_chroma_qp_index_offset;
gboolean valid;
};
struct GstH264HRDParams
struct GstH264HRDParams {
guint8 cpb_cnt_minus1;
guint8 bit_rate_scale;
guint8 cpb_size_scale;
guint32 bit_rate_value_minus1[32];
guint32 cpb_size_value_minus1[32];
guint8 cbr_flag[32];
guint8 initial_cpb_removal_delay_length_minus1;
guint8 cpb_removal_delay_length_minus1;
guint8 dpb_output_delay_length_minus1;
guint8 time_offset_length;
};
struct GstH264VUIParams
struct GstH264VUIParams {
guint8 aspect_ratio_info_present_flag;
guint8 aspect_ratio_idc;
/* if aspect_ratio_idc == 255 */
guint16 sar_width;
guint16 sar_height;
guint8 overscan_info_present_flag;
/* if overscan_info_present_flag */
guint8 overscan_appropriate_flag;
guint8 video_signal_type_present_flag;
guint8 video_format;
guint8 video_full_range_flag;
guint8 colour_description_present_flag;
guint8 colour_primaries;
guint8 transfer_characteristics;
guint8 matrix_coefficients;
guint8 chroma_loc_info_present_flag;
guint8 chroma_sample_loc_type_top_field;
guint8 chroma_sample_loc_type_bottom_field;
guint8 timing_info_present_flag;
/* if timing_info_present_flag */
guint32 num_units_in_tick;
guint32 time_scale;
guint8 fixed_frame_rate_flag;
guint8 nal_hrd_parameters_present_flag;
/* if nal_hrd_parameters_present_flag */
GstH264HRDParams nal_hrd_parameters;
guint8 vcl_hrd_parameters_present_flag;
/* if nal_hrd_parameters_present_flag */
GstH264HRDParams vcl_hrd_parameters;
guint8 low_delay_hrd_flag;
guint8 pic_struct_present_flag;
guint8 bitstream_restriction_flag;
/* if bitstream_restriction_flag */
guint8 motion_vectors_over_pic_boundaries_flag;
guint32 max_bytes_per_pic_denom;
guint32 max_bits_per_mb_denom;
guint32 log2_max_mv_length_horizontal;
guint32 log2_max_mv_length_vertical;
guint32 num_reorder_frames;
guint32 max_dec_frame_buffering;
};
struct GstH264DecRefPicMarking
struct GstH264DecRefPicMarking {
/* if slice->nal_unit.IdrPicFlag */
guint8 no_output_of_prior_pics_flag;
guint8 long_term_reference_flag;
guint8 adaptive_ref_pic_marking_mode_flag;
GstH264RefPicMarking ref_pic_marking[10];
guint8 n_ref_pic_marking;
};
struct GstH264RefPicMarking
struct GstH264RefPicMarking {
guint8 memory_management_control_operation;
guint32 difference_of_pic_nums_minus1;
guint32 long_term_pic_num;
guint32 long_term_frame_idx;
guint32 max_long_term_frame_idx_plus1;
};
struct GstH264PredWeightTable
struct GstH264PredWeightTable {
guint8 luma_log2_weight_denom;
guint8 chroma_log2_weight_denom;
gint16 luma_weight_l0[32];
gint8 luma_offset_l0[32];
/* if seq->ChromaArrayType != 0 */
gint16 chroma_weight_l0[32][2];
gint8 chroma_offset_l0[32][2];
/* if slice->slice_type % 5 == 1 */
gint16 luma_weight_l1[32];
gint8 luma_offset_l1[32];
/* and if seq->ChromaArrayType != 0 */
gint16 chroma_weight_l1[32][2];
gint8 chroma_offset_l1[32][2];
};
struct GstH264SliceHdr
struct GstH264SliceHdr {
guint32 first_mb_in_slice;
guint32 type;
GstH264PPS *pps;
/* if seq->separate_colour_plane_flag */
guint8 colour_plane_id;
guint16 frame_num;
guint8 field_pic_flag;
guint8 bottom_field_flag;
/* if nal_unit.type == 5 */
guint16 idr_pic_id;
/* if seq->pic_order_cnt_type == 0 */
guint16 pic_order_cnt_lsb;
/* if seq->pic_order_present_flag && !field_pic_flag */
gint32 delta_pic_order_cnt_bottom;
gint32 delta_pic_order_cnt[2];
guint8 redundant_pic_cnt;
/* if slice_type == B_SLICE */
guint8 direct_spatial_mv_pred_flag;
guint8 num_ref_idx_l0_active_minus1;
guint8 num_ref_idx_l1_active_minus1;
guint8 ref_pic_list_modification_flag_l0;
guint8 n_ref_pic_list_modification_l0;
GstH264RefPicListModification ref_pic_list_modification_l0[32];
guint8 ref_pic_list_modification_flag_l1;
guint8 n_ref_pic_list_modification_l1;
GstH264RefPicListModification ref_pic_list_modification_l1[32];
GstH264PredWeightTable pred_weight_table;
/* if nal_unit.ref_idc != 0 */
GstH264DecRefPicMarking dec_ref_pic_marking;
guint8 cabac_init_idc;
gint8 slice_qp_delta;
gint8 slice_qs_delta;
guint8 disable_deblocking_filter_idc;
gint8 slice_alpha_c0_offset_div2;
gint8 slice_beta_offset_div2;
guint16 slice_group_change_cycle;
/* calculated values */
guint32 max_pic_num;
gboolean valid;
/* Size of the slice_header() in bits */
guint header_size;
};
struct GstH264ClockTimestamp
struct GstH264ClockTimestamp {
guint8 ct_type;
guint8 nuit_field_based_flag;
guint8 counting_type;
guint8 discontinuity_flag;
guint8 cnt_dropped_flag;
guint8 n_frames;
guint8 seconds_flag;
guint8 seconds_value;
guint8 minutes_flag;
guint8 minutes_value;
guint8 hours_flag;
guint8 hours_value;
guint32 time_offset;
};
struct GstH264PicTiming
struct GstH264PicTiming {
guint32 cpb_removal_delay;
guint32 dpb_output_delay;
guint8 pic_struct_present_flag;
/* if pic_struct_present_flag */
guint8 pic_struct;
guint8 clock_timestamp_flag[3];
GstH264ClockTimestamp clock_timestamp[3];
};
struct GstH264BufferingPeriod
struct GstH264BufferingPeriod {
GstH264SPS *sps;
/* seq->vui_parameters->nal_hrd_parameters_present_flag */
guint8 nal_initial_cpb_removal_delay[32];
guint8 nal_initial_cpb_removal_delay_offset[32];
/* seq->vui_parameters->vcl_hrd_parameters_present_flag */
guint8 vcl_initial_cpb_removal_delay[32];
guint8 vcl_initial_cpb_removal_delay_offset[32];
};
struct GstH264SEIMessage
struct GstH264SEIMessage {
GstH264SEIPayloadType payloadType;
union {
GstH264BufferingPeriod buffering_period;
GstH264PicTiming pic_timing;
/* ... could implement more */
};
};