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H.265/HEVC bitstream parser
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| #!/usr/bin/env python | |
| """ | |
| - ae(v): context-adaptive arithmetic entropy-coded syntax element. The parsing process for this descriptor is | |
| specified in clause 9.3. | |
| - b(8): byte having any pattern of bit string (8 bits). The parsing process | |
| for this descriptor is specified by the return value of the function | |
| read_bits( 8 ). | |
| - f(n): fixed-pattern bit string using n bits written (from left to right) | |
| with the left bit first. The parsing process for this descriptor is specified | |
| by the return value of the function read_bits( n ). | |
| - se(v): signed integer 0-th order Exp-Golomb-coded syntax element with the left bit first. The parsing process | |
| for this descriptor is specified in clause 9.2. | |
| - u(n): unsigned integer using n bits. When n is "v" in the syntax table, the number of bits varies in a manner | |
| dependent on the value of other syntax elements. The parsing process for this descriptor is specified by the | |
| return value of the function read_bits( n ) interpreted as a binary representation of an unsigned integer with | |
| most significant bit written first. | |
| - ue(v): unsigned integer 0-th order Exp-Golomb-coded syntax element with the left bit first. The parsing | |
| process for this descriptor is specified in clause 9.2. | |
| """ | |
| import sys | |
| import os | |
| import re | |
| from bitstring import BitArray, BitStream | |
| class NalUnitType: | |
| """ | |
| Table 7-1 - NAL unit type codes and NAL unit type classes | |
| copypaste from source/Lib/TLibCommon/CommonDef.h | |
| """ | |
| NAL_UNIT_CODED_SLICE_TRAIL_N = 0 | |
| NAL_UNIT_CODED_SLICE_TRAIL_R = 1 | |
| NAL_UNIT_CODED_SLICE_TSA_N = 2 | |
| NAL_UNIT_CODED_SLICE_TSA_R = 3 | |
| NAL_UNIT_CODED_SLICE_STSA_N = 4 | |
| NAL_UNIT_CODED_SLICE_STSA_R = 5 | |
| NAL_UNIT_CODED_SLICE_RADL_N = 6 | |
| NAL_UNIT_CODED_SLICE_RADL_R = 7 | |
| NAL_UNIT_CODED_SLICE_RASL_N = 8 | |
| NAL_UNIT_CODED_SLICE_RASL_R = 9 | |
| NAL_UNIT_RESERVED_VCL_N10 = 10 | |
| NAL_UNIT_RESERVED_VCL_R11 = 11 | |
| NAL_UNIT_RESERVED_VCL_N12 = 12 | |
| NAL_UNIT_RESERVED_VCL_R13 = 13 | |
| NAL_UNIT_RESERVED_VCL_N14 = 14 | |
| NAL_UNIT_RESERVED_VCL_R15 = 15 | |
| NAL_UNIT_CODED_SLICE_BLA_W_LP = 16 | |
| NAL_UNIT_CODED_SLICE_BLA_W_RADL = 17 | |
| NAL_UNIT_CODED_SLICE_BLA_N_LP = 18 | |
| NAL_UNIT_CODED_SLICE_IDR_W_RADL = 19 | |
| NAL_UNIT_CODED_SLICE_IDR_N_LP = 20 | |
| NAL_UNIT_CODED_SLICE_CRA = 21 | |
| NAL_UNIT_RESERVED_IRAP_VCL22 = 22 | |
| NAL_UNIT_RESERVED_IRAP_VCL23 = 23 | |
| NAL_UNIT_RESERVED_VCL24 = 24 | |
| NAL_UNIT_RESERVED_VCL25 = 25 | |
| NAL_UNIT_RESERVED_VCL26 = 26 | |
| NAL_UNIT_RESERVED_VCL27 = 27 | |
| NAL_UNIT_RESERVED_VCL28 = 28 | |
| NAL_UNIT_RESERVED_VCL29 = 29 | |
| NAL_UNIT_RESERVED_VCL30 = 30 | |
| NAL_UNIT_RESERVED_VCL31 = 31 | |
| NAL_UNIT_VPS = 32 | |
| NAL_UNIT_SPS = 33 | |
| NAL_UNIT_PPS = 34 | |
| NAL_UNIT_ACCESS_UNIT_DELIMITER = 35 | |
| NAL_UNIT_EOS = 36 | |
| NAL_UNIT_EOB = 37 | |
| NAL_UNIT_FILLER_DATA = 38 | |
| NAL_UNIT_PREFIX_SEI = 39 | |
| NAL_UNIT_SUFFIX_SEI = 40 | |
| NAL_UNIT_RESERVED_NVCL41 = 41 | |
| NAL_UNIT_RESERVED_NVCL42 = 42 | |
| NAL_UNIT_RESERVED_NVCL43 = 43 | |
| NAL_UNIT_RESERVED_NVCL44 = 44 | |
| NAL_UNIT_RESERVED_NVCL45 = 45 | |
| NAL_UNIT_RESERVED_NVCL46 = 46 | |
| NAL_UNIT_RESERVED_NVCL47 = 47 | |
| NAL_UNIT_UNSPECIFIED_48 = 48 | |
| NAL_UNIT_UNSPECIFIED_49 = 49 | |
| NAL_UNIT_UNSPECIFIED_50 = 50 | |
| NAL_UNIT_UNSPECIFIED_51 = 51 | |
| NAL_UNIT_UNSPECIFIED_52 = 52 | |
| NAL_UNIT_UNSPECIFIED_53 = 53 | |
| NAL_UNIT_UNSPECIFIED_54 = 54 | |
| NAL_UNIT_UNSPECIFIED_55 = 55 | |
| NAL_UNIT_UNSPECIFIED_56 = 56 | |
| NAL_UNIT_UNSPECIFIED_57 = 57 | |
| NAL_UNIT_UNSPECIFIED_58 = 58 | |
| NAL_UNIT_UNSPECIFIED_59 = 59 | |
| NAL_UNIT_UNSPECIFIED_60 = 60 | |
| NAL_UNIT_UNSPECIFIED_61 = 61 | |
| NAL_UNIT_UNSPECIFIED_62 = 62 | |
| NAL_UNIT_UNSPECIFIED_63 = 63 | |
| NAL_UNIT_INVALID = 64 | |
| class slice_segment_header(object): | |
| def __init__(self, s): | |
| """ | |
| 7.3.6.1 General slice segment header syntax | |
| """ | |
| pass | |
| def show(self): | |
| pass | |
| class slice_segment_data(object): | |
| def __init__(self, s): | |
| """ | |
| """ | |
| pass | |
| def show(self): | |
| pass | |
| class rbsp_slice_segment_trailing_bits(object): | |
| def __init__(self, s): | |
| """ | |
| """ | |
| pass | |
| def show(self): | |
| pass | |
| class hrd_parameters(object): | |
| def __init__(self, s, commonInfPresentFlag, maxNumSubLayersMinus1): | |
| """ | |
| E.2.2 HRD parameters syntax | |
| """ | |
| self.t='\t\t' | |
| if commonInfPresentFlag: | |
| self.nal_hrd_parameters_present_flag = s.read('uint:1') | |
| self.vcl_hrd_parameters_present_flag = s.read('uint:1') | |
| if self.nal_hrd_parameters_present_flag or self.vcl_hrd_parameters_present_flag: | |
| self.sub_pic_hrd_params_present_flag = s.read('uint:1') | |
| if self.sub_pic_hrd_params_present_flag: | |
| self.tick_divisor_minus2 = s.read('uint:8') | |
| self.du_cpb_removal_delay_increment_length_minus1 = s.read('uint:5') | |
| self.sub_pic_cpb_params_in_pic_timing_sei_flag = s.read('uint:1') | |
| self.dpb_output_delay_du_length_minus1 = s.read('uint:5') | |
| self.bit_rate_scale = s.read('uint:4') | |
| self.cpb_size_scale = s.read('uint:4') | |
| if self.sub_pic_hrd_params_present_flag: | |
| self.icpb_size_du_scale = s.read('uint:4') | |
| self.initial_cpb_removal_delay_length_minus1 = s.read('uint:5') | |
| self.au_cpb_removal_delay_length_minus1 = s.read('uint:5') | |
| self.dpb_output_delay_length_minus1 = s.read('uint:5') | |
| for i in range(maxNumSubLayersMinus1 + 1): | |
| self.fixed_pic_rate_general_flag[ i ] = s.read('uint:1') | |
| if not self.fixed_pic_rate_general_flag[i]: | |
| self.fixed_pic_rate_within_cvs_flag[i] = s.read('uint:1') | |
| if self.fixed_pic_rate_within_cvs_flag[i]: | |
| self.elemental_duration_in_tc_minus1[i] = s.read('ue') | |
| else: | |
| self.low_delay_hrd_flag[i] = s.read('uint:1') | |
| if not self.low_delay_hrd_flag[i]: | |
| self.cpb_cnt_minus1[i] = s.read('ue') | |
| if self.nal_hrd_parameters_present_flag: | |
| sub_layer_hrd_parameters(s, i) | |
| if self.vcl_hrd_parameters_present_flag: | |
| self.sub_layer_hrd_parameters(s,i) | |
| def show(self): | |
| """ | |
| """ | |
| attrs = vars(self) | |
| print self.t,'hrd parameters' | |
| print self.t,'==============' | |
| for k, v in attrs.iteritems(): | |
| print k, v | |
| class slice_segment_layer_rbsp(object): | |
| def __init__(self, s): | |
| """ | |
| Interpret next bits in BitString s as an ... | |
| 7.3.2.9 Slice segment layer RBSP syntax | |
| """ | |
| self.t = '\t' | |
| slice_segment_header(s).show() | |
| slice_segment_data(s).show() | |
| rbsp_slice_segment_trailing_bits(s) | |
| def show(self): | |
| pass | |
| class video_parameter_set_rbsp(object): | |
| def __init__(self, s): | |
| """ | |
| Interpret next bits in BitString s as an VPS | |
| 7.3.2.1 Video parameter set RBSP syntax | |
| """ | |
| self.t = '\t' | |
| self.vps_video_parameter_set_id = s.read('uint:4') | |
| self.vps_reserved_three_2bits = s.read('uint:2') | |
| self.vps_max_layers_minus1 = s.read('uint:6') | |
| self.vps_max_sub_layers_minus1 = s.read('uint:3') | |
| self.vps_temporal_id_nesting_flag = s.read('uint:1') | |
| self.vps_reserved_0xffff_16bits = s.read('uint:16') | |
| self.ptl = profile_tier_level(s, self.vps_max_sub_layers_minus1) | |
| self.vps_sub_layer_ordering_info_present_flag = s.read('uint:1') | |
| i = 0 if self.vps_sub_layer_ordering_info_present_flag else self.vps_max_sub_layers_minus1 | |
| self.vps_max_dec_pic_buffering_minus1 = [] | |
| self.vps_max_num_reorder_pics = [] | |
| self.vps_max_latency_increase_plus1 = [] | |
| for n in range(self.vps_max_sub_layers_minus1 + 1): | |
| self.vps_max_dec_pic_buffering_minus1.append(s.read('ue')) | |
| self.vps_max_num_reorder_pics.append(s.read('ue')) | |
| self.vps_max_latency_increase_plus1.append(s.read('ue')) | |
| self.vps_max_layer_id = s.read('uint:1') | |
| self.vps_num_layer_sets_minus1 = s.read('uint:1') | |
| for i in range(self.vps_num_layer_sets_minus1 + 1): | |
| for j in range(self.vps_max_layer_id + 1): | |
| #layer_id_included_flag[ i ][ j ] | |
| s.read('uint:1') | |
| self.vps_timing_info_present_flag = s.read('uint:1') | |
| if self.vps_timing_info_present_flag: | |
| self.vps_num_units_in_tick = s.read('uint:1') | |
| self.vps_time_scale = s.read('uint:1') | |
| self.vps_poc_proportional_to_timing_flag = s.read('uint:1') | |
| if self.vps_poc_proportional_to_timing_flag: | |
| self.vps_num_ticks_poc_diff_one_minus1 = s.read('uint:1') | |
| self.vps_num_hrd_parameters = s.read('uint:1') | |
| self.hrd_layer_set_idx = [] | |
| self.cprms_present_flag = [] | |
| for i in range(self.vps_num_hrd_parameters): | |
| self.hrd_layer_set_idx.append(s.read('ue')) | |
| if i > 0: | |
| cprms_present_flag.append(s.read('uint:1')) | |
| self.hrdp = hrd_parameters(cprms_present_flag[i], self.vps_max_sub_layers_minus1) | |
| self.vps_extension_flag = s.read('uint:1') | |
| # if self.vps_extension_flag: | |
| # while( more_rbsp_data( ) ) | |
| # vps_extension_data_flag | |
| # rbsp_trailing_bits( ) | |
| def show(self): | |
| print self.t,'Video parameter Set RBSP' | |
| print self.t,'========================' | |
| print self.t,'vps_video_parameter_set_id', self.vps_video_parameter_set_id | |
| print self.t,'vps_reserved_three_2bits', self.vps_reserved_three_2bits | |
| print self.t,'vps_max_layers_minus1', self.vps_max_layers_minus1 | |
| print self.t,'vps_max_sub_layers_minus1', self.vps_max_sub_layers_minus1 | |
| print self.t,'vps_temporal_id_nesting_flag', self.vps_temporal_id_nesting_flag | |
| print self.t,'vps_reserved_0xffff_16bits', self.vps_reserved_0xffff_16bits | |
| self.ptl.show() | |
| print self.t, 'vps_sub_layer_ordering_info_present_flag', self.vps_sub_layer_ordering_info_present_flag | |
| for n in range(self.vps_max_sub_layers_minus1 + 1): | |
| print self.t, 'vps_max_dec_pic_buffering_minus1', self.vps_max_dec_pic_buffering_minus1 | |
| print self.t, 'vps_max_num_reorder_pics', self.vps_max_num_reorder_pics | |
| print self.t, 'vps_max_latency_increase_plus1', self.vps_max_latency_increase_plus1 | |
| print self.t, 'vps_max_layer_id', self.vps_max_layer_id | |
| print self.t, 'vps_num_layer_sets_minus1', self.vps_num_layer_sets_minus1 | |
| for i in range(self.vps_num_layer_sets_minus1 + 1): | |
| for j in range(self.vps_max_layer_id + 1): | |
| #layer_id_included_flag[ i ][ j ] | |
| pass | |
| print self.t, 'vps_timing_info_present_flag', self.vps_timing_info_present_flag | |
| if self.vps_timing_info_present_flag: | |
| print self.t, 'vps_num_units_in_tick', self.vps_num_units_in_tick | |
| print self.t, 'vps_time_scale', self.vps_time_scale | |
| print self.t, 'vps_poc_proportional_to_timing_flag', self.vps_poc_proportional_to_timing_flag | |
| if self.vps_poc_proportional_to_timing_flag: | |
| print self.t, 'vps_num_ticks_poc_diff_one_minus1', self.vps_num_ticks_poc_diff_one_minus1 | |
| print self.t, 'vps_num_hrd_parameters', self.vps_num_hrd_parameters | |
| for i in range(self.vps_num_hrd_parameters): | |
| self.hrd_layer_set_idx.append(s.read('ue')) | |
| if i > 0: | |
| cprms_present_flag.append(s.read('uint:1')) | |
| self.hrdp.show() | |
| print self.t, 'vps_extension_flag', self.vps_extension_flag | |
| class profile_tier_level(object): | |
| def __init__(self, s, maxNumSubLayersMinus1): | |
| """ | |
| Interpret next bits in BitString s as an profile_tier_level | |
| 7.3.3 Profile, tier and level syntax | |
| """ | |
| self.t = '\t\t' | |
| self.general_profile_space = s.read('uint:2') | |
| self.general_tier_flag = s.read('uint:1') | |
| self.general_profile_idc = s.read('uint:5') | |
| self.general_profile_compatibility_flag = [s.read('uint:1') for _ in range(32)] | |
| self.general_progressive_source_flag = s.read('uint:1') | |
| self.general_interlaced_source_flag = s.read('uint:1') | |
| self.general_non_packed_constraint_flag = s.read('uint:1') | |
| self.general_frame_only_constraint_flag = s.read('uint:1') | |
| self.general_reserved_zero_44bits = s.read('uint:44') | |
| self.general_level_idc = s.read('uint:8') | |
| self.sub_layer_profile_present_flag = [] | |
| self.sub_layer_level_present_flag = [] | |
| for i in range(maxNumSubLayersMinus1): | |
| self.sub_layer_profile_present_flag.append(s.read('uint:1')) | |
| self.sub_layer_level_present_flag.append(s.read('uint:1')) | |
| def show(self): | |
| print self.t,'Profile Tier Level' | |
| print self.t,'==================' | |
| print self.t,'general_profile_space', self.general_profile_space | |
| print self.t,'general_tier_flag', self.general_tier_flag | |
| print self.t,'general_profile_idc', self.general_profile_idc | |
| for i in range(32): | |
| print "{}{}[{:2d}] {}".format(self.t, 'general_profile_compatibility_flag', i, self.general_profile_compatibility_flag[i]) | |
| print self.t,'general_progressive_source_flag', self.general_progressive_source_flag | |
| print self.t,'general_interlaced_source_flag', self.general_interlaced_source_flag | |
| print self.t,'general_non_packed_constraint_flag', self.general_non_packed_constraint_flag | |
| print self.t,'general_frame_only_constraint_flag', self.general_frame_only_constraint_flag | |
| print self.t,'general_reserved_zero_44bits', self.general_reserved_zero_44bits | |
| # print self.t,"{0:b}".format(self.general_reserved_zero_44bits) | |
| print self.t,'general_level_idc', self.general_level_idc | |
| print self.t,'sub_layer_profile_present_flag', self.sub_layer_profile_present_flag | |
| print self.t,'sub_layer_level_present_flag', self.sub_layer_level_present_flag | |
| class seq_parameter_set_rbsp(object): | |
| def __init__(self, s): | |
| """ | |
| Interpret next bits in BitString s as an SPS | |
| 7.3.2.2 Sequence parameter set RBSP syntax | |
| """ | |
| self.t = '\t' | |
| self.sps_video_parameter_set_id = s.read('uint:4') | |
| self.sps_max_sub_layers_minus1 = s.read('uint:1') | |
| self.sps_temporal_id_nesting_flag = s.read('uint:1') | |
| self.ptl = profile_tier_level(s, self.sps_max_sub_layers_minus1) | |
| def show(self): | |
| print self.t,'Sequence Parameter Set RBSP' | |
| print self.t,'===========================' | |
| print self.t,'sps_video_parameter_set_id', self.sps_video_parameter_set_id | |
| print self.t,'sps_max_sub_layers_minus1', self.sps_max_sub_layers_minus1 | |
| print self.t,'sps_temporal_id_nesting_flag', self.sps_temporal_id_nesting_flag | |
| self.ptl.show() | |
| class pic_parameter_set_rbsp(object): | |
| def __init__(self, s): | |
| """ | |
| Interpret next bits in BitString s as an PPS | |
| 7.3.2.3 Picture parameter set RBSP syntax | |
| """ | |
| self.t='\t' | |
| self.pps_pic_parameter_set_id = s.read('ue') | |
| self.pps_seq_parameter_set_id = s.read('ue') | |
| self.dependent_slice_segments_enabled_flag = s.read('uint:1') | |
| self.output_flag_present_flag = s.read('uint:1') | |
| self.num_extra_slice_header_bits = s.read('uint:3') | |
| self.sign_data_hiding_enabled_flag = s.read('uint:1') | |
| self.cabac_init_present_flag = s.read('uint:1') | |
| self.num_ref_idx_l0_default_active_minus1 = s.read('ue') | |
| self.num_ref_idx_l1_default_active_minus1 = s.read('ue') | |
| self.init_qp_minus26 = s.read('se') | |
| self.constrained_intra_pred_flag = s.read('uint:1') | |
| self.transform_skip_enabled_flag = s.read('uint:1') | |
| self.cu_qp_delta_enabled_flag = s.read('uint:1') | |
| if self.cu_qp_delta_enabled_flag: | |
| self.diff_cu_qp_delta_depth = s.read('ue') | |
| self.pps_cb_qp_offset = s.read('se') | |
| self.pps_cr_qp_offset = s.read('se') | |
| self.pps_slice_chroma_qp_offsets_present_flag = s.read('uint:1') | |
| self.weighted_pred_flag = s.read('uint:1') | |
| self.weighted_bipred_flag = s.read('uint:1') | |
| self.transquant_bypass_enabled_flag = s.read('uint:1') | |
| self.tiles_enabled_flag = s.read('uint:1') | |
| self.entropy_coding_sync_enabled_flag = s.read('uint:1') | |
| if self.tiles_enabled_flag: | |
| self.num_tile_columns_minus1 = s.read('ue') | |
| self.num_tile_rows_minus1 = s.read('ue') | |
| self.uniform_spacing_flag = s.read('uint:1') | |
| if not self.uniform_spacing_flag: | |
| self.column_width_minus1 = [s.read('ue') for _ in range(self.num_tile_columns_minus1)] | |
| self.row_height_minus1 = [s.read('ue') for _ in range(self.num_tile_rows_minus1)] | |
| self.loop_filter_across_tiles_enabled_flagi = s.read('uint:1') | |
| self.pps_loop_filter_across_slices_enabled_flag = s.read('uint:1') | |
| self.deblocking_filter_control_present_flag = s.read('uint:1') | |
| if self.deblocking_filter_control_present_flag: | |
| self.deblocking_filter_override_enabled_flag = s.read('uint:1') | |
| self.pps_deblocking_filter_disabled_flag = s.read('uint:1') | |
| if not self.pps_deblocking_filter_disabled_flag: | |
| self.pps_beta_offset_div2 = s.read('se') | |
| self.pps_tc_offset_div2 = s.read('se') | |
| self.pps_scaling_list_data_present_flag = s.read('uint:1') | |
| if self.pps_scaling_list_data_present_flag: | |
| scaling_list_data(s) | |
| self.lists_modification_present_flag = s.read('uint:1') | |
| self.log2_parallel_merge_level_minus2 = s.read('ue') | |
| self.slice_segment_header_extension_present_flag = s.read('uint:1') | |
| self.pps_extension_flag = s.read('uint:1') | |
| # if self.pps_extension_flag: | |
| # while more_rbsp_data(): | |
| # self.pps_extension_data_flag = s.read('uint:1') | |
| # rbsp_trailing_bits() | |
| def show(self): | |
| print self.t,'Picture Parameter Set RBSP' | |
| print self.t,'==========================' | |
| print self.t,'pps_pic_parameter_set_id', self.pps_pic_parameter_set_id | |
| print self.t,'pps_seq_parameter_set_id', self.pps_seq_parameter_set_id | |
| print self.t,'dependent_slice_segments_enabled_flag', self.dependent_slice_segments_enabled_flag | |
| print self.t,'output_flag_present_flag', self.output_flag_present_flag | |
| print self.t,'num_extra_slice_header_bits', self.num_extra_slice_header_bits | |
| print self.t,'sign_data_hiding_enabled_flag', self.sign_data_hiding_enabled_flag | |
| print self.t,'cabac_init_present_flag', self.cabac_init_present_flag | |
| print self.t,'num_ref_idx_l0_default_active_minus1', self.num_ref_idx_l0_default_active_minus1 | |
| print self.t,'num_ref_idx_l1_default_active_minus1', self.num_ref_idx_l1_default_active_minus1 | |
| print self.t,'init_qp_minus26', self.init_qp_minus26 | |
| print self.t,'constrained_intra_pred_flag', self.constrained_intra_pred_flag | |
| print self.t,'transform_skip_enabled_flag', self.transform_skip_enabled_flag | |
| print self.t,'cu_qp_delta_enabled_flag', self.cu_qp_delta_enabled_flag | |
| if self.cu_qp_delta_enabled_flag: | |
| print self.t,'diff_cu_qp_delta_depth', self.diff_cu_qp_delta_depth | |
| print self.t,'pps_cb_qp_offset', self.pps_cb_qp_offset | |
| print self.t,'pps_cr_qp_offset', self.pps_cr_qp_offset | |
| print self.t,'pps_slice_chroma_qp_offsets_present_flag', self.pps_slice_chroma_qp_offsets_present_flag | |
| print self.t,'weighted_pred_flag', self.weighted_pred_flag | |
| print self.t,'weighted_bipred_flag', self.weighted_bipred_flag | |
| print self.t,'transquant_bypass_enabled_flag', self.transquant_bypass_enabled_flag | |
| print self.t,'tiles_enabled_flag', self.tiles_enabled_flag | |
| print self.t,'entropy_coding_sync_enabled_flag', self.entropy_coding_sync_enabled_flag | |
| if self.tiles_enabled_flag: | |
| print self.t, 'num_tile_columns_minus1', self.num_tile_columns_minus1 | |
| print self.t, 'num_tile_rows_minus1', self.num_tile_rows_minus1 | |
| print self.t, 'uniform_spacing_flag', self.uniform_spacing_flag | |
| if not self.uniform_spacing_flag: | |
| print self.t, 'column_width_minus1', self.column_width_minus1 | |
| print self.t, 'row_height_minus1', self.row_height_minus1 | |
| print self.t, 'loop_filter_across_tiles_enabled_flagi', self.loop_filter_across_tiles_enabled_flagi | |
| print self.t, 'pps_loop_filter_across_slices_enabled_flag', self.pps_loop_filter_across_slices_enabled_flag | |
| print self.t, 'deblocking_filter_control_present_flag', self.deblocking_filter_control_present_flag | |
| if self.deblocking_filter_control_present_flag: | |
| print self.t, 'deblocking_filter_override_enabled_flag', self.deblocking_filter_override_enabled_flag | |
| print self.t, 'pps_deblocking_filter_disabled_flag', self.pps_deblocking_filter_disabled_flag | |
| if not self.pps_deblocking_filter_disabled_flag: | |
| print self.t, 'pps_beta_offset_div2', self.pps_beta_offset_div2 | |
| print self.t, 'pps_tc_offset_div2', self.pps_tc_offset_div2 | |
| print self.t, 'pps_scaling_list_data_present_flag', self.pps_scaling_list_data_present_flag | |
| if self.pps_scaling_list_data_present_flag: | |
| scaling_list_data(s) | |
| print self.t, 'lists_modification_present_flag', self.lists_modification_present_flag | |
| print self.t, 'log2_parallel_merge_level_minus2', self.log2_parallel_merge_level_minus2 | |
| print self.t, 'slice_segment_header_extension_present_flag', self.slice_segment_header_extension_present_flag | |
| print self.t, 'pps_extension_flag', self.pps_extension_flag | |
| class nal_unit_header(object): | |
| def __init__(self, s): | |
| """ | |
| Interpret next bits in BitString s as a nal_unit | |
| """ | |
| self.forbidden_zero_bit = s.read('uint:1') | |
| self.nal_unit_type = s.read('uint:6') | |
| self.nuh_layer_id = s.read('uint:6') | |
| self.nuh_temporal_id_plus1 = s.read('uint:3') | |
| def show(self): | |
| print 'forbidden_zero_bit', self.forbidden_zero_bit | |
| print 'nal_unit_type', self.nal_unit_type | |
| print 'nuh_layer_id', self.nuh_layer_id | |
| print 'nuh_temporal_id_plus1', self.nuh_temporal_id_plus1 | |
| def read_nal_unit(s, i, NumBytesInNalUnit): | |
| """ | |
| Table 7-1 - NAL unit type codes and NAL unit type classes | |
| """ | |
| # Advance pointer and skip 24 bits, i.e. 0x000001 | |
| s.pos = i + 24 | |
| n = nal_unit_header(s) | |
| n.show() | |
| # 7.3.1.1 | |
| # Convert NAL data (Annex B format) to RBSP data | |
| NumBytesInRbsp = 0 | |
| rbsp_byte = BitStream() | |
| for i in xrange(NumBytesInNalUnit): | |
| if (i+2) < NumBytesInNalUnit and s.peek('bits:24') == '0x000003': | |
| rbsp_byte.append(s.read('bits:8')) | |
| rbsp_byte.append(s.read('bits:8')) | |
| # emulation_prevention_three_byte | |
| s.read('bits:8') | |
| else: | |
| rbsp_byte.append(s.read('bits:8')) | |
| NumBytesInRbsp = len(rbsp_byte) | |
| s = rbsp_byte | |
| nal_unit_type = n.nal_unit_type | |
| if nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_TRAIL_N or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_TRAIL_R: | |
| # Coded slice segment of a non-TSA, non-STSA trailing picture | |
| slice_segment_layer_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_TSA_N or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_TSA_R: | |
| # Coded slice segment of a TSA picture | |
| slice_segment_layer_rbsp(s) | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_STSA_N or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_STSA_R: | |
| # Coded slice segment of an STSA picture | |
| slice_segment_layer_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_RADL_N or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_RADL_R: | |
| # Coded slice segment of a RADL picture | |
| slice_segment_layer_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_RASL_N or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_RASL_R: | |
| # Coded slice segment of a RADL picture | |
| slice_segment_layer_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL_N10 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL_N12 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL_N14: | |
| # Reserved non-IRAP sub-layer non-reference VCL NAL unit types | |
| pass | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL_R11 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL_R13 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL_R15: | |
| # Reserved non-IRAP sub-layer reference VCL NAL unit types | |
| pass | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_BLA_W_LP or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_BLA_W_RADL or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_BLA_N_LP: | |
| # Coded slice segment of a BLA picture | |
| slice_segment_layer_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_IDR_W_RADL or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_IDR_N_LP: | |
| # Coded slice segment of an IDR picture | |
| slice_segment_layer_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_CODED_SLICE_CRA: | |
| # Coded slice segment of a CRA picture | |
| slice_segment_layer_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_IRAP_VCL22 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_IRAP_VCL23: | |
| # Reserved IRAP VCL NAL unit types | |
| pass | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL24 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL25 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL26 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL27 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL28 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL29 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL30 or \ | |
| nal_unit_type == NalUnitType.NAL_UNIT_RESERVED_VCL31: | |
| #Reserved non-IRAP VCL NAL unit types | |
| pass | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_VPS: | |
| # Video parameter set | |
| video_parameter_set_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_SPS: | |
| # Sequence parameter set | |
| seq_parameter_set_rbsp(s).show() | |
| elif nal_unit_type == NalUnitType.NAL_UNIT_PPS: | |
| # Picture parameter set | |
| pic_parameter_set_rbsp(s).show() | |
| def main(): | |
| """ | |
| """ | |
| F = 'bqmall.bin' | |
| s = BitStream(filename=F) | |
| nals = list(s.findall('0x000001', bytealigned=True)) | |
| size = [y - x for x,y in zip(nals,nals[1:])] | |
| for i, n in zip(nals, size): | |
| print "!! Found NAL @ offset {0:d} ({0:#x})".format((i+24)/8) | |
| read_nal_unit(s, i, n/8) # bits to bytes | |
| if __name__ == "__main__": | |
| main() |
Thank you for sharing the code!
I think there is a wrong parsing process at line 341:
sps_max_sub_layers_minus1 is parsed by u(3).
I corrected it in my fork
Useful! but there is one missing.
Where is the definition of "scaling_list_data" ?
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AAAAAUABDAH//wFgAAADALAAAAMAAAMAP6oCQAAAAAFCAQEBYAAAAwCwAAADAAADAD+gBQIBaWNq pJMvkAAAAAFEAcDy8DyQAAAAAUQBwPLwPJAAAAABRAHA8vA8kA==leads to
!! Found NAL @ offset 4 (0x4)
forbidden_zero_bit 0
nal_unit_type 32
...
Video parameter Set RBSP
========================
...
Profile Tier Level
==================
general_profile_space 0
general_tier_flag 0
general_profile_idc 1
general_profile_compatibility_flag[ 0] 0
general_profile_compatibility_flag[ 1] 1
general_profile_compatibility_flag[ 2] 1
...
general_progressive_source_flag 1
general_interlaced_source_flag 0
general_non_packed_constraint_flag 1
general_frame_only_constraint_flag 1
general_reserved_zero_44bits 0
general_level_idc 63
...
!! Found NAL @ offset 32 (0x20)
forbidden_zero_bit 0
nal_unit_type 33
...
...
Profile Tier Level
==================
general_profile_space 1
general_tier_flag 0
general_profile_idc 0
general_profile_compatibility_flag[ 0] 0
general_profile_compatibility_flag[ 1] 1
general_profile_compatibility_flag[ 2] 0
general_profile_compatibility_flag[ 3] 1
general_profile_compatibility_flag[ 4] 1
general_profile_compatibility_flag[ 5] 0
...
general_progressive_source_flag 0
general_interlaced_source_flag 0
general_non_packed_constraint_flag 1
general_frame_only_constraint_flag 0
! general_reserved_zero_44bits 13194139533312
! general_level_idc 15