/* packet-h264.c * Routines for H.264 dissection * Copyright 2007 - 2009, Anders Broman * * $Id$ * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * References: * http://www.ietf.org/rfc/rfc3984.txt?number=3984 * http://www.itu.int/rec/T-REC-H.264/en */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include /* Initialize the protocol and registered fields */ static int proto_h264 = -1; static int hf_h264_type = -1; static int hf_h264_nal_f_bit = -1; static int hf_h264_nal_nri = -1; static int hf_h264_start_bit = -1; static int hf_h264_forbidden_bit = -1; static int hf_h264_end_bit = -1; static int hf_h264_profile = -1; static int hf_h264_profile_idc = -1; static int hf_h264_rbsp_stop_bit = -1; static int hf_h264_rbsp_trailing_bits = -1; static int hf_h264_constraint_set0_flag = -1; static int hf_h264_constraint_set1_flag = -1; static int hf_h264_constraint_set2_flag = -1; static int hf_h264_constraint_set3_flag = -1; static int hf_h264_reserved_zero_4bits = -1; static int hf_h264_level_idc = -1; static int hf_h264_nal_unit = -1; static int hf_h264_forbidden_zero_bit = -1; static int hf_h264_nal_ref_idc = -1; static int hf_h264_nal_unit_type = -1; static int hf_h264_seq_parameter_set_id = -1; static int hf_h264_chroma_format_idc = -1; static int hf_h264_residual_colour_transform_flag = -1; static int hf_h264_bit_depth_luma_minus8 = -1; static int hf_h264_bit_depth_chroma_minus8 = -1; static int hf_h264_qpprime_y_zero_transform_bypass_flag = -1; static int hf_h264_seq_scaling_matrix_present_flag = -1; static int hf_h264_log2_max_frame_num_minus4 = -1; static int hf_h264_pic_order_cnt_type = -1; static int hf_h264_log2_max_pic_order_cnt_lsb_minus4 = -1; static int hf_h264_delta_pic_order_always_zero_flag = -1; static int hf_h264_offset_for_non_ref_pic = -1; static int hf_h264_offset_for_top_to_bottom_field = -1; static int hf_h264_num_ref_frames_in_pic_order_cnt_cycle = -1; static int hf_h264_offset_for_ref_frame = -1; static int hf_h264_num_ref_frames = -1; static int hf_h264_gaps_in_frame_num_value_allowed_flag = -1; static int hf_h264_pic_width_in_mbs_minus1 = -1; static int hf_h264_pic_height_in_map_units_minus1 = -1; static int hf_h264_frame_mbs_only_flag = -1; static int hf_h264_mb_adaptive_frame_field_flag = -1; static int hf_h264_direct_8x8_inference_flag = -1; static int hf_h264_frame_cropping_flag = -1; static int hf_h264_frame_crop_left_offset = -1; static int hf_h264_frame_crop_right_offset = -1; static int hf_h264_frame_crop_top_offset = -1; static int hf_h264_frame_crop_bottom_offset = -1; static int hf_h264_vui_parameters_present_flag = -1; static int hf_h264_pic_parameter_set_id = -1; static int hf_h264_entropy_coding_mode_flag = -1; static int hf_h264_pic_order_present_flag = -1; static int hf_h264_num_slice_groups_minus1 = -1; static int hf_h264_slice_group_map_type = -1; static int hf_h264_num_ref_idx_l0_active_minus1 = -1; static int hf_h264_num_ref_idx_l1_active_minus1 = -1; static int hf_h264_weighted_pred_flag = -1; static int hf_h264_weighted_bipred_idc = -1; static int hf_h264_pic_init_qp_minus26 = -1; static int hf_h264_pic_init_qs_minus26 = -1; static int hf_h264_chroma_qp_index_offset = -1; static int hf_h264_deblocking_filter_control_present_flag = -1; static int hf_h264_constrained_intra_pred_flag = -1; static int hf_h264_redundant_pic_cnt_present_flag = -1; static int hf_h264_transform_8x8_mode_flag = -1; static int hf_h264_pic_scaling_matrix_present_flag = -1; static int hf_h264_second_chroma_qp_index_offset = -1; static int hf_h264_par_profile = -1; static int hf_h264_par_profile_b = -1; static int hf_h264_par_profile_m = -1; static int hf_h264_par_profile_e = -1; static int hf_h264_par_profile_h = -1; static int hf_h264_par_profile_h10 = -1; static int hf_h264_par_profile_h4_2_2 = -1; static int hf_h264_par_profile_h4_4_4 = -1; static int hf_h264_par_add_mode_sup = -1; static int hf_h264_par_AdditionalModesSupported = -1; static int hf_h264_par_add_mode_sup_rcdo = -1; static int hf_h264_par_ProfileIOP = -1; static int hf_h264_par_constraint_set0_flag = -1; static int hf_h264_par_constraint_set1_flag = -1; static int hf_h264_par_constraint_set2_flag = -1; /* VUI parameters */ static int hf_h264_aspect_ratio_info_present_flag = -1; static int hf_h264_aspect_ratio_idc = -1; static int hf_h264_sar_width = -1; static int hf_h264_sar_height = -1; static int hf_h264_overscan_info_present_flag = -1; static int hf_h264_overscan_appropriate_flag = -1; static int hf_h264_video_signal_type_present_flag = -1; static int hf_h264_video_format = -1; static int hf_h264_video_full_range_flag = -1; static int hf_h264_colour_description_present_flag = -1; static int hf_h264_colour_primaries = -1; static int hf_h264_transfer_characteristics = -1; static int hf_h264_matrix_coefficients = -1; static int hf_h264_chroma_loc_info_present_flag = -1; static int hf_h264_chroma_sample_loc_type_top_field = -1; static int hf_h264_chroma_sample_loc_type_bottom_field = -1; static int hf_h264_timing_info_present_flag = -1; static int hf_h264_num_units_in_tick = -1; static int hf_h264_time_scale = -1; static int hf_h264_fixed_frame_rate_flag = -1; static int hf_h264_nal_hrd_parameters_present_flag = -1; static int hf_h264_vcl_hrd_parameters_present_flag = -1; static int hf_h264_low_delay_hrd_flag = -1; static int hf_h264_pic_struct_present_flag = -1; static int hf_h264_bitstream_restriction_flag = -1; static int hf_h264_motion_vectors_over_pic_boundaries_flag = -1; static int hf_h264_max_bytes_per_pic_denom = -1; static int hf_h264_max_bits_per_mb_denom = -1; static int hf_h264_log2_max_mv_length_horizontal = -1; static int hf_h264_log2_max_mv_length_vertical = -1; static int hf_h264_num_reorder_frames = -1; static int hf_h264_max_dec_frame_buffering = -1; static int hf_h264_cpb_cnt_minus1 = -1; static int hf_h264_bit_rate_scale = -1; static int hf_h264_cpb_size_scale = -1; static int hf_h264_bit_rate_value_minus1 = -1; static int hf_h264_cpb_size_value_minus1 = -1; static int hf_h264_cbr_flag = -1; static int hf_h264_initial_cpb_removal_delay_length_minus1 = -1; static int hf_h264_cpb_removal_delay_length_minus1 = -1; static int hf_h264_dpb_output_delay_length_minus11 = -1; static int hf_h264_time_offset_length = -1; static int hf_h264_first_mb_in_slice = -1; static int hf_h264_slice_type = -1; static int hf_h264_slice_id = -1; static int hf_h264_payloadsize = -1; static int hf_h264_payloadtype = -1; static int hf_h264_frame_num = -1; /* Initialize the subtree pointers */ static int ett_h264 = -1; static int ett_h264_profile = -1; static int ett_h264_nal = -1; static int ett_h264_fua = -1; static int ett_h264_stream = -1; static int ett_h264_nal_unit = -1; static int ett_h264_par_profile = -1; static int ett_h264_par_AdditionalModesSupported = -1; static int ett_h264_par_ProfileIOP = -1; /* The dynamic payload type range which will be dissected as H.264 */ #define RTP_PT_DEFAULT_RANGE "0" static range_t *temp_dynamic_payload_type_range = NULL; static dissector_handle_t h264_handle; /* syntax tables in subclause 7.3 is equal to * ue(v), me(v), se(v), or te(v). */ typedef enum { H264_UE_V = 0, H264_ME_V = 1, H264_SE_V = 2, H264_TE_V = 3 } h264_golomb_descriptors; static const true_false_string h264_f_bit_vals = { "Bit errors or other syntax violations", "No bit errors or other syntax violations" }; static const true_false_string h264_start_bit_vals = { "the first packet of FU-A picture", "Not the first packet of FU-A picture" }; static const true_false_string h264_end_bit_vals = { "the last packet of FU-A picture", "Not the last packet of FU-A picture" }; static const true_false_string h264_forbidden_bit_vals = { "Forbidden Bit of FU-A", "Not Forbidden Bit of FU-A" }; #define H264_SEQ_PAR_SET 7 #define H264_PIC_PAR_SET 8 static const value_string h264_type_values[] = { { 0, "Undefined" }, { 1, "NAL unit - Coded slice of a non-IDR picture" }, /* Single NAL unit packet per H.264 */ { 2, "NAL unit - Coded slice data partition A" }, { 3, "NAL unit - Coded slice data partition B" }, { 4, "NAL unit - Coded slice data partition C" }, { 5, "NAL unit - Coded slice of an IDR picture" }, { 6, "NAL unit - Supplemental enhancement information (SEI)" }, { H264_SEQ_PAR_SET, "NAL unit - Sequence parameter set" }, /* 7 */ { H264_PIC_PAR_SET, "NAL unit - Picture parameter set" }, /* 8 */ { 9, "NAL unit - Access unit delimiter" }, { 10, "NAL unit - End of sequence" }, { 11, "NAL unit - End of stream" }, { 12, "NAL unit - Filler data" }, { 13, "NAL unit - Sequence parameter set extension" }, { 14, "NAL unit - Reserved" }, { 15, "NAL unit - Reserved" }, { 16, "NAL unit - Reserved" }, { 17, "NAL unit - Reserved" }, { 18, "NAL unit - Reserved" }, { 19, "NAL unit - Coded slice of an auxiliary coded picture without partitioning" }, { 20, "NAL unit - Reserved" }, { 21, "NAL unit - Reserved" }, { 22, "NAL unit - Reserved" }, { 23, "NAL unit - Reserved" }, { 24, "STAP-A" }, /* Single-time aggregation packet */ { 25, "STAP-B" }, /* Single-time aggregation packet */ { 26, "MTAP16" }, /* Multi-time aggregation packet */ { 27, "MTAP24" }, /* Multi-time aggregation packet */ { 28, "FU-A" }, /* Fragmentation unit */ { 29, "FU-B" }, /* Fragmentation unit */ { 30, "undefined" }, { 31, "undefined" }, { 0, NULL } }; static const value_string h264_profile_idc_values[] = { { 66, "Baseline profile" }, { 77, "Main profile" }, { 88, "Extended profile" }, { 100, "High profile" }, { 110, "High 10 profile" }, { 122, "High 4:2:2 profile" }, { 144, "High 4:4:4 profile" }, { 0, NULL } }; static const value_string h264_level_bitrate_values[] = { { 10, "64kb/s" }, { 11, "192kb/s" }, { 12, "384kb/s" }, { 13, "2 Mb/s" }, { 20, "2 Mb/s" }, { 21, "4 Mb/s" }, { 22, "4 Mb/s" }, { 30, "10 Mb/s" }, { 31, "14 Mb/s" }, { 32, "20 Mb/s" }, { 40, "20 Mb/s" }, { 41, "50 Mb/s" }, { 42, "50 Mb/s" }, { 50, "135 Mb/s" }, { 51, "240 Mb/s" }, { 0, NULL } }; static const value_string h264_nal_unit_type_vals[] = { { 0, "Unspecified" }, { 1, "Coded slice of a non-IDR picture" }, { 2, "Coded slice data partition A" }, { 3, "Coded slice data partition B" }, { 4, "Coded slice data partition C" }, { 5, "Coded slice of an IDR picture" }, { 6, "Supplemental enhancement information (SEI)" }, { 7, "Sequence parameter set" }, { 8, "Picture parameter set" }, { 9, "Access unit delimiter" }, { 10, "End of sequence" }, { 11, "End of stream" }, { 12, "Filler data" }, { 13, "Sequence parameter set extension" }, { 14, "Reserved" }, { 15, "Reserved" }, { 16, "Reserved" }, { 17, "Reserved" }, { 18, "Reserved" }, { 19, "Coded slice of an auxiliary coded picture without partitioning" }, { 20, "Reserved" }, { 21, "Reserved" }, { 22, "Reserved" }, { 23, "Reserved" }, { 24, "Unspecified" }, { 25, "Unspecified" }, { 26, "Unspecified" }, { 27, "Unspecified" }, { 28, "FU-A" }, { 29, "Unspecified" }, { 30, "Unspecified" }, { 31, "Unspecified" }, { 0, NULL } }; static const value_string h264_slice_group_map_type_vals[] = { { 0, "Interleaved slice groups" }, { 1, "Dispersed slice group mapping" }, { 2, "One or more foreground slice groups and a leftover slice group" }, { 3, "Changing slice groups" }, { 4, "Changing slice groups" }, { 5, "Changing slice groups" }, { 6, "Explicit assignment of a slice group to each slice group map unit" }, { 0, NULL } }; /* Table 7-6 Name association to slice_type */ static const value_string h264_slice_type_vals[] = { { 0, "P (P slice)" }, { 1, "B (B slice)" }, { 2, "I (I slice)" }, { 3, "SP (SP slice)" }, { 4, "SI (SI slice)" }, { 5, "P (P slice)" }, { 6, "B (B slice)" }, { 7, "I (I slice)" }, { 8, "SP (SP slice)" }, { 9, "SI (SI slice)" }, { 0, NULL } }; /* byte_aligned( ) is specified as follows. * - If the current position in the bitstream is on a byte boundary, i.e., * the next bit in the bitstream is the first bit in a byte, * the return value of byte_aligned( ) is equal to TRUE. * - Otherwise, the return value of byte_aligned( ) is equal to FALSE. */ static gboolean h264_byte_aligned(int bit_offset) { if(bit_offset&0x3) return FALSE; return TRUE; } /* Expect a tvb and a bit offset into the tvb * returns the valu and bit_offset */ #define cVALS(x) (const value_string*)(x) guint32 dissect_h264_exp_golomb_code(proto_tree *tree, int hf_index, tvbuff_t *tvb, gint *start_bit_offset, h264_golomb_descriptors descriptor) /*(tvbuff_t *tvb, gint *start_bit_offset) */ { gint leading_zero_bits, bit_offset, start_offset; guint32 codenum, mask, value, tmp; gint32 se_value=0; gint b; char *str; int bit; int i; header_field_info *hf_field = NULL; start_offset = *start_bit_offset>>3; if(hf_index > -1) hf_field = proto_registrar_get_nth(hf_index); bit_offset = *start_bit_offset; /* prepare the string */ str=ep_alloc(256); str[0]='\0'; for(bit=0;bit<((int)(bit_offset&0x07));bit++){ if(bit&&(!(bit%4))){ g_strlcat(str, " ", 256); } g_strlcat(str,".", 256); } leading_zero_bits = -1; for( b = 0; !b; leading_zero_bits++ ){ if(bit&&(!(bit%4))){ g_strlcat(str, " ", 256); } if(bit&&(!(bit%8))){ g_strlcat(str, " ", 256); } b = tvb_get_bits8(tvb, bit_offset, 1); if(b != 0){ g_strlcat(str, "1", 256); } else { g_strlcat(str, "0", 256); } bit++; bit_offset++; } if(leading_zero_bits==0){ codenum = 0; *start_bit_offset = bit_offset; for(;bit%8;bit++){ if(bit&&(!(bit%4))){ g_strlcat(str, " ", 256); } g_strlcat(str,".", 256); } if(hf_field){ g_strlcat(str," = ", 256); g_strlcat(str,hf_field->name, 256); switch (descriptor){ case H264_SE_V: /* if the syntax element is coded as se(v), * the value of the syntax element is derived by invoking the * mapping process for signed Exp-Golomb codes as specified in * subclause 9.1.1 with codeNum as the input. */ if(hf_field->type==FT_INT32){ if (hf_field->strings) { proto_tree_add_int_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %s (%d)", str, val_to_str(codenum, cVALS(hf_field->strings), "Unknown "), codenum); }else{ switch(hf_field->display){ case BASE_DEC: proto_tree_add_int_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %d", str, codenum); break; default: DISSECTOR_ASSERT_NOT_REACHED(); break; } } } return codenum; default: break; } if(hf_field->type==FT_UINT32){ if (hf_field->strings) { proto_tree_add_uint_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %s (%u)", str, val_to_str(codenum, cVALS(hf_field->strings), "Unknown "), codenum); }else{ switch(hf_field->display){ case BASE_DEC: proto_tree_add_uint_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %u", str, codenum); break; case BASE_HEX: proto_tree_add_uint_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: 0x%x", str, codenum); break; default: DISSECTOR_ASSERT_NOT_REACHED(); break; } } }else{ /* Only allow guint32 */ DISSECTOR_ASSERT_NOT_REACHED(); } } return codenum; } /* Syntax elements coded as ue(v), me(v), or se(v) are Exp-Golomb-coded. Syntax elements coded as te(v) are truncated Exp-Golomb-coded. The parsing process for these syntax elements begins with reading the bits starting at the current location in the bitstream up to and including the first non-zero bit, and counting the number of leading bits that are equal to 0. This process is specified as follows: leadingZeroBits = -1; for( b = 0; !b; leadingZeroBits++ ) b = read_bits( 1 ) The variable codeNum is then assigned as follows: codeNum = 2leadingZeroBits - 1 + read_bits( leadingZeroBits ) where the value returned from read_bits( leadingZeroBits ) is interpreted as a binary representation of an unsigned integer with most significant bit written first. */ codenum = 1; codenum = codenum << leading_zero_bits; mask = codenum>>1; if (leading_zero_bits > 32) DISSECTOR_ASSERT_NOT_REACHED(); else if (leading_zero_bits > 16) value = tvb_get_bits32(tvb, bit_offset,leading_zero_bits, ENC_BIG_ENDIAN); else if (leading_zero_bits > 8) value = tvb_get_bits16(tvb, bit_offset,leading_zero_bits, ENC_BIG_ENDIAN); else value = tvb_get_bits8(tvb, bit_offset,leading_zero_bits ); codenum = (codenum-1) + value; bit_offset = bit_offset + leading_zero_bits; /* read the bits for the int */ for(i=0;i>1; } for(;bit%8;bit++){ if(bit&&(!(bit%4))){ g_strlcat(str, " ", 256); } g_strlcat(str,".", 256); } switch (descriptor){ case H264_SE_V: /* if the syntax element is coded as se(v), * the value of the syntax element is derived by invoking the * mapping process for signed Exp-Golomb codes as specified in * subclause 9.1.1 with codeNum as the input. * k+1 * (-1) Ceil( k/2 ) */ se_value = (codenum + 1) >> 1; if (!(se_value & 1)){ se_value = - se_value; } break; default: break; } if(hf_field){ g_strlcat(str," = ", 256); g_strlcat(str,hf_field->name, 256); switch (descriptor){ case H264_SE_V: g_strlcat(str,"(se(v))", 256); /* if the syntax element is coded as se(v), * the value of the syntax element is derived by invoking the * mapping process for signed Exp-Golomb codes as specified in * subclause 9.1.1 with codeNum as the input. */ break; default: break; } if((hf_field->type==FT_UINT32)&&(descriptor==H264_UE_V)){ if (hf_field->strings) { proto_tree_add_uint_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %s (%u)", str, val_to_str(codenum, cVALS(hf_field->strings), "Unknown "), codenum); }else{ switch(hf_field->display){ case BASE_DEC: proto_tree_add_uint_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %u", str, codenum); break; case BASE_HEX: proto_tree_add_uint_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: 0x%x", str, codenum); break; default: DISSECTOR_ASSERT_NOT_REACHED(); break; } } }else if((hf_field->type==FT_INT32)&&(descriptor==H264_SE_V)){ if (hf_field->strings) { proto_tree_add_int_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %s (%d)", str, val_to_str(codenum, cVALS(hf_field->strings), "Unknown "), se_value); }else{ switch(hf_field->display){ case BASE_DEC: proto_tree_add_int_format(tree, hf_index, tvb, start_offset, 1, codenum, "%s: %d", str, se_value); break; default: DISSECTOR_ASSERT_NOT_REACHED(); break; } } *start_bit_offset = bit_offset; return se_value; }else{ /* Only allow guint32 */ DISSECTOR_ASSERT_NOT_REACHED(); } } *start_bit_offset = bit_offset; return codenum; } /* This function is adapted to parsing NAL units from SDP data where the * base64 coding may add extra padding */ static gboolean more_rbsp_data(proto_tree *tree _U_, tvbuff_t *tvb, packet_info *pinfo _U_, gint bit_offset) { int offset; int remaining_length; int last_one_bit; guint8 b = 0; /* XXX might not be the best way of doing things but: * Serch from the end of the tvb for the first '1' bit * assuming that its's the RTBSP stop bit */ /* Set offset to the byte we are treating */ offset = bit_offset>>3; remaining_length = tvb_length_remaining(tvb,offset); /* If there is more then 2 bytes left there *should* be more data */ if(remaining_length>2){ return TRUE; } /* Start from last bit */ last_one_bit = (tvb_length(tvb) << 3); for( b = 0; !b; ){ last_one_bit--; b = tvb_get_bits8(tvb, last_one_bit, 1); } if( last_one_bit == bit_offset){ return FALSE; } return TRUE; } static int dissect_h264_rbsp_trailing_bits(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint bit_offset) { gint remaining_bits=0; proto_tree_add_bits_item(tree, hf_h264_rbsp_stop_bit, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if((bit_offset&0x7)!=0){ remaining_bits = 8 - (bit_offset&0x7); proto_tree_add_bits_item(tree, hf_h264_rbsp_trailing_bits, tvb, bit_offset, remaining_bits, ENC_BIG_ENDIAN); } return bit_offset+remaining_bits; } /* * 7.3.3 Slice header syntax * slice_header( ) * XXX Just parse a few bytes */ static int dissect_h264_slice_header(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint bit_offset) { /* first_mb_in_slice 2 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_first_mb_in_slice, tvb, &bit_offset, H264_UE_V); /* slice_type 2 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_slice_type, tvb, &bit_offset, H264_UE_V); /* pic_parameter_set_id 2 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_pic_parameter_set_id, tvb, &bit_offset, H264_UE_V); /* frame_num 2 u(v) */ /* * represented by log2_max_frame_num_minus4 + 4 bits in * the bitstream * proto_tree_add_bits_item(tree, hf_h264_frame_num, tvb, bit_offset, 4, ENC_BIG_ENDIAN); */ return bit_offset; } /* 7.3.2.1.1 Scaling list syntax * * scaling_list( scalingList, sizeOfScalingList, useDefaultScalingMatrixFlag ) */ /* static int dissect_h264_scaling_list(proto_tree *tree, tvbuff_t *tvb, gint bit_offset, int hf_index_scalinglist, guint8 sizeOfScalingList, int hf_index_usedefaultscalingmatrixflag) { guint8 lastScale = 8; guint8 nextScale = 8: guint8 delta_scale; for( j = 0; j < sizeOfScalingList; j++ ) { if( nextScale != 0 ) { / delta_scale 0 | 1 se(v) / delta_scale = dissect_h264_exp_golomb_code(tree, hf_h264_delta_scale, tvb, &bit_offset); nextScale = ( lastScale + delta_scale + 256 ) % 256; useDefaultScalingMatrixFlag = ( j == 0 && nextScale == 0 ); } scalingList[ j ] = ( nextScale == 0 ) ? lastScale : nextScale lastScale = scalingList[ j ] } } */ /* E.1.2 HRD parameters syntax */ static int dissect_h264_hrd_parameters(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint bit_offset) { guint8 cpb_cnt_minus1; int SchedSelIdx; /* cpb_cnt_minus1 0 ue(v) */ cpb_cnt_minus1 = dissect_h264_exp_golomb_code(tree, hf_h264_cpb_cnt_minus1, tvb, &bit_offset, H264_UE_V); /* bit_rate_scale 0 u(4) */ proto_tree_add_bits_item(tree, hf_h264_bit_rate_scale, tvb, bit_offset, 4, ENC_BIG_ENDIAN); bit_offset = bit_offset + 4; /* cpb_size_scale 0 u(4) */ proto_tree_add_bits_item(tree, hf_h264_cpb_size_scale, tvb, bit_offset, 4, ENC_BIG_ENDIAN); bit_offset = bit_offset + 4; /* for( SchedSelIdx = 0; SchedSelIdx <= cpb_cnt_minus1; SchedSelIdx++ ) { */ for( SchedSelIdx = 0; SchedSelIdx <= cpb_cnt_minus1; SchedSelIdx++ ) { /* bit_rate_value_minus1[ SchedSelIdx ] 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_bit_rate_value_minus1, tvb, &bit_offset, H264_UE_V); /* cpb_size_value_minus1[ SchedSelIdx ] 0 ue(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_cpb_size_value_minus1, tvb, &bit_offset, H264_UE_V); /* cbr_flag[ SchedSelIdx ] 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_cbr_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; } /* initial_cpb_removal_delay_length_minus1 0 u(5) */ proto_tree_add_bits_item(tree, hf_h264_initial_cpb_removal_delay_length_minus1, tvb, bit_offset, 5, ENC_BIG_ENDIAN); bit_offset = bit_offset + 5; /* cpb_removal_delay_length_minus1 0 u(5) */ proto_tree_add_bits_item(tree, hf_h264_cpb_removal_delay_length_minus1, tvb, bit_offset, 5, ENC_BIG_ENDIAN); bit_offset = bit_offset + 5; /* dpb_output_delay_length_minus1 0 u(5) */ proto_tree_add_bits_item(tree, hf_h264_dpb_output_delay_length_minus11, tvb, bit_offset, 5, ENC_BIG_ENDIAN); bit_offset = bit_offset + 5; /* time_offset_length 0 u(5) */ proto_tree_add_bits_item(tree, hf_h264_time_offset_length, tvb, bit_offset, 5, ENC_BIG_ENDIAN); bit_offset = bit_offset + 5; return bit_offset; } #define EXTENDED_SAR 255 /* E.1.1 VUI parameters syntax */ /* Table E-2 - Meaning of video_format */ static const value_string h264_video_format_vals[] = { { 22, "reserved_sei_message)" }, { 0, "Component" }, { 1, "PAL" }, { 2, "NTSC" }, { 3, "SECAM" }, { 4, "MAC" }, { 5, "Unspecified video format" }, { 6, "Reserved" }, { 7, "Reserved" }, { 0, NULL } }; static int dissect_h264_vui_parameters(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, gint bit_offset) { guint8 aspect_ratio_info_present_flag, aspect_ratio_idc, overscan_info_present_flag; guint8 video_signal_type_present_flag, colour_description_present_flag, chroma_loc_info_present_flag; guint8 timing_info_present_flag, nal_hrd_parameters_present_flag, vcl_hrd_parameters_present_flag; guint8 bitstream_restriction_flag; /* vui_parameters( ) { * aspect_ratio_info_present_flag 0 u(1) */ aspect_ratio_info_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_aspect_ratio_info_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( aspect_ratio_info_present_flag ) { /* aspect_ratio_idc 0 u(8) */ aspect_ratio_idc = tvb_get_bits8(tvb, bit_offset, 8); proto_tree_add_bits_item(tree, hf_h264_aspect_ratio_idc, tvb, bit_offset, 8, ENC_BIG_ENDIAN); bit_offset = bit_offset + 8; if( aspect_ratio_idc == EXTENDED_SAR ) { /* sar_width 0 u(16) */ proto_tree_add_bits_item(tree, hf_h264_sar_width, tvb, bit_offset, 16, ENC_BIG_ENDIAN); bit_offset = bit_offset + 16; /* sar_height 0 u(16) */ proto_tree_add_bits_item(tree, hf_h264_sar_height, tvb, bit_offset, 16, ENC_BIG_ENDIAN); bit_offset = bit_offset + 16; } } /* overscan_info_present_flag 0 u(1) */ overscan_info_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_overscan_info_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( overscan_info_present_flag ){ /* overscan_appropriate_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_overscan_appropriate_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; } /* video_signal_type_present_flag 0 u(1) */ video_signal_type_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_video_signal_type_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( video_signal_type_present_flag ) { /* video_format 0 u(3) > */ proto_tree_add_bits_item(tree, hf_h264_video_format, tvb, bit_offset, 3, ENC_BIG_ENDIAN); bit_offset = bit_offset + 3; /* video_full_range_flag 0 u(1)*/ proto_tree_add_bits_item(tree, hf_h264_video_full_range_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* colour_description_present_flag 0 u(1) */ colour_description_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_colour_description_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( colour_description_present_flag ) { /* colour_primaries 0 u(8) */ proto_tree_add_bits_item(tree, hf_h264_colour_primaries, tvb, bit_offset, 8, ENC_BIG_ENDIAN); bit_offset = bit_offset + 8; /* transfer_characteristics 0 u(8) */ proto_tree_add_bits_item(tree, hf_h264_transfer_characteristics, tvb, bit_offset, 8, ENC_BIG_ENDIAN); bit_offset = bit_offset + 8; /* matrix_coefficients 0 u(8)*/ proto_tree_add_bits_item(tree, hf_h264_matrix_coefficients, tvb, bit_offset, 8, ENC_BIG_ENDIAN); bit_offset = bit_offset + 8; } } /* chroma_loc_info_present_flag 0 u(1) */ chroma_loc_info_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_chroma_loc_info_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( chroma_loc_info_present_flag ) { /* chroma_sample_loc_type_top_field 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_chroma_sample_loc_type_top_field, tvb, &bit_offset, H264_UE_V); /* chroma_sample_loc_type_bottom_field 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_chroma_sample_loc_type_bottom_field, tvb, &bit_offset, H264_UE_V); } /* timing_info_present_flag 0 u(1) */ timing_info_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_timing_info_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( timing_info_present_flag ) { /* num_units_in_tick 0 u(32) */ proto_tree_add_bits_item(tree, hf_h264_num_units_in_tick, tvb, bit_offset, 32, ENC_BIG_ENDIAN); bit_offset = bit_offset + 32; /* time_scale 0 u(32) */ proto_tree_add_bits_item(tree, hf_h264_time_scale, tvb, bit_offset, 32, ENC_BIG_ENDIAN); bit_offset = bit_offset + 32; /* fixed_frame_rate_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_fixed_frame_rate_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; } /* nal_hrd_parameters_present_flag 0 u(1) */ nal_hrd_parameters_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_nal_hrd_parameters_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( nal_hrd_parameters_present_flag ){ /* hrd_parameters( ) */ bit_offset = dissect_h264_hrd_parameters(tree, tvb, pinfo, bit_offset); } /* vcl_hrd_parameters_present_flag 0 u(1) */ vcl_hrd_parameters_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_vcl_hrd_parameters_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( vcl_hrd_parameters_present_flag ){ /* hrd_parameters( ) */ bit_offset = dissect_h264_hrd_parameters(tree, tvb, pinfo, bit_offset); } if( nal_hrd_parameters_present_flag || vcl_hrd_parameters_present_flag ){ /* low_delay_hrd_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_low_delay_hrd_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; } /* pic_struct_present_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_pic_struct_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* bitstream_restriction_flag 0 u(1) */ bitstream_restriction_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_bitstream_restriction_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( bitstream_restriction_flag ) { /* motion_vectors_over_pic_boundaries_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_motion_vectors_over_pic_boundaries_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* max_bytes_per_pic_denom 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_max_bytes_per_pic_denom, tvb, &bit_offset, H264_UE_V); /* max_bits_per_mb_denom 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_max_bits_per_mb_denom, tvb, &bit_offset, H264_UE_V); /* log2_max_mv_length_horizontal 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_log2_max_mv_length_horizontal, tvb, &bit_offset, H264_UE_V); /* log2_max_mv_length_vertical 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_log2_max_mv_length_vertical, tvb, &bit_offset, H264_UE_V); /* num_reorder_frames 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_num_reorder_frames, tvb, &bit_offset, H264_UE_V); /* max_dec_frame_buffering 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_max_dec_frame_buffering, tvb, &bit_offset, H264_UE_V); } return bit_offset; } /* Used To dissect SDP parameter (H.264)profile */ void dissect_h264_profile(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) { proto_item *item, *level_item; proto_tree *h264_profile_tree; gint offset = 0; guint8 constraint_set3_flag; guint32 level_idc; item = proto_tree_add_item(tree, hf_h264_profile, tvb, offset, -1, ENC_NA); h264_profile_tree = proto_item_add_subtree(item, ett_h264_profile); proto_tree_add_item(h264_profile_tree, hf_h264_profile_idc, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; constraint_set3_flag = (tvb_get_guint8(tvb,offset)&0x10)>>4; proto_tree_add_item(h264_profile_tree, hf_h264_constraint_set0_flag, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(h264_profile_tree, hf_h264_constraint_set1_flag, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(h264_profile_tree, hf_h264_constraint_set2_flag, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(h264_profile_tree, hf_h264_constraint_set3_flag, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(h264_profile_tree, hf_h264_reserved_zero_4bits, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* A level to which the bitstream conforms shall be indicated by the syntax element level_idc as follows. * - If level_idc is equal to 11 and constraint_set3_flag is equal to 1, the indicated level is level 1b. * - Otherwise (level_idc is not equal to 11 or constraint_set3_flag is not equal to 1), level_idc shall * be set equal to a value of ten times the level number specified in Table A-1 and constraint_set3_flag * shall be set equal to 0. */ level_idc = tvb_get_guint8(tvb,offset); level_item = proto_tree_add_item(h264_profile_tree, hf_h264_level_idc, tvb, offset, 1, ENC_BIG_ENDIAN); if((level_idc==11)&&(constraint_set3_flag==1)){ proto_item_append_text(level_item," [Level 1b (128kb/s)]"); }else{ proto_item_append_text(level_item," [Level %.1f %s]",((double)level_idc/10),val_to_str(level_idc, h264_level_bitrate_values, "Unknown ")); } } /* * 7.3.2.8 Slice layer without partitioning RBSP syntax * slice_layer_without_partitioning_rbsp( ) */ static void dissect_h264_slice_layer_without_partitioning_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, gint offset) { gint bit_offset; bit_offset = offset <<3; /* slice_header( ) 2 */ bit_offset = dissect_h264_slice_header(tree, tvb, pinfo, bit_offset); proto_tree_add_text(tree, tvb, bit_offset>>3, -1, "[Not decoded yet]"); return; /* slice_data( ) * all categories of slice_data( ) syntax * 2 | 3 | 4 */ /* rbsp_slice_trailing_bits( ) */ } /* * 7.3.2.9.1 Slice data partition A RBSP syntax * slice_data_partition_a_layer_rbsp( ) */ static void dissect_h264_slice_data_partition_a_layer_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { gint bit_offset; bit_offset = offset <<3; /* slice_header( ) 2 */ bit_offset = dissect_h264_slice_header(tree, tvb, pinfo, bit_offset); /* slice_id All ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_slice_id, tvb, &bit_offset, H264_UE_V); proto_tree_add_text(tree, tvb, bit_offset>>3, -1, "[Not decoded yet]"); return; /* slice_data( ) * only category 2 parts of slice_data( ) syntax * 2*/ /* rbsp_slice_trailing_bits( )*/ } /* * 7.3.2.9.2 Slice data partition B RBSP syntax * slice_data_partition_b_layer_rbsp( */ static void dissect_h264_slice_data_partition_b_layer_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { gint bit_offset; bit_offset = offset <<3; /* slice_id All ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_slice_id, tvb, &bit_offset, H264_UE_V); /* if( redundant_pic_cnt_present_flag ) */ /* redundant_pic_cnt All ue(v) */ /* slice_data( ) * only category 3 parts of slice_data( ) syntax * 3 */ /* rbsp_slice_trailing_bits( ) 3 */ proto_tree_add_text(tree, tvb, bit_offset>>3, -1, "[Not decoded yet]"); } /* * 7.3.2.9.3 Slice data partition C RBSP syntax * slice_data_partition_c_layer_rbsp( ) */ static void dissect_h264_slice_data_partition_c_layer_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { gint bit_offset; bit_offset = offset <<3; /* slice_id All ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_slice_id, tvb, &bit_offset, H264_UE_V); /* if( redundant_pic_cnt_present_flag ) */ /* redundant_pic_cnt All ue(v) */ /* slice_data( ) * only category 4 parts of slice_data( ) syntax * 4 */ /* rbsp_slice_trailing_bits( ) 4 */ proto_tree_add_text(tree, tvb, bit_offset>>3, -1, "[Not decoded yet]"); } /* D.1.6 User data unregistered SEI message syntax */ static int h264_user_data_unregistered(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint bit_offset, guint32 payloadSize) { /* user_data_unregistered( payloadSize ) { C Descriptor */ /* uuid_iso_iec_11578 5 u(128) * uuid_iso_iec_11578 shall have a value specified as a UUID * according to the procedures of ISO/IEC 11578:1996 Annex A. */ proto_tree_add_text(tree, tvb, bit_offset>>3, 16, "uuid_iso_iec_1157"); bit_offset+=128; /* for( i = 16; i < payloadSize; i++ ) * user_data_payload_byte 5 b(8) */ proto_tree_add_text(tree, tvb, bit_offset>>3, payloadSize-16, "user_data_payload"); bit_offset+=(payloadSize-16)<<3; return bit_offset; } /* D.1 SEI payload syntax */ static const value_string h264_sei_payload_vals[] = { { 0, "buffering_period" }, { 1, "pic_timing" }, { 2, "pan_scan_rect" }, { 3, "filler_payload" }, { 4, "user_data_registered_itu_t_t35" }, { 5, "user_data_unregistered" }, { 6, "recovery_point" }, { 7, "dec_ref_pic_marking_repetition" }, { 8, "spare_pic" }, { 9, "scene_inf)" }, { 10, "sub_seq_info)" }, { 11, "sub_seq_layer_characteristics" }, { 12, "sub_seq_characteristics" }, { 13, "full_frame_freeze_release" }, { 14, "full_frame_freeze_release" }, { 15, "full_frame_snapshot" }, { 16, "progressive_refinement_segment_start" }, { 17, "progressive_refinement_segment_end" }, { 18, "motion_constrained_slice_group_set" }, { 19, "film_grain_characteristics)" }, { 20, "deblocking_filter_display_preference)" }, { 21, "stereo_video_info)" }, { 22, "reserved_sei_message)" }, { 0, NULL } }; static int h264_sei_payload(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint bit_offset, guint32 payloadType, guint32 payloadSize) { /* sei_payload( payloadType, payloadSize ) { C Descriptor */ if( payloadType == 0 ){ /* buffering_period( payloadSize ) 5 */ bit_offset = bit_offset +(payloadSize<<3); #if 0 }else if( payloadType == 1 ){ /* pic_timing( payloadSize ) 5 */ }else if( payloadType == 2 ){ /* pan_scan_rect( payloadSize ) 5 */ }else if( payloadType == 3 ){ /* filler_payload( payloadSize ) 5 */ }else if( payloadType == 4 ){ /* user_data_registered_itu_t_t35( payloadSize ) 5 */ #endif }else if( payloadType == 5 ){ /* user_data_unregistered( payloadSize ) 5 */ bit_offset = h264_user_data_unregistered( tree, tvb, pinfo, bit_offset, payloadSize); }else if( payloadType == 6 ){ /* recovery_point( payloadSize ) 5 */ bit_offset = bit_offset +(payloadSize<<3); }else if( payloadType == 7 ){ /* dec_ref_pic_marking_repetition( payloadSize ) 5 */ bit_offset = bit_offset +(payloadSize<<3); } #if 0 else if( payloadType == 8 ) spare_pic( payloadSize ) 5 else if( payloadType == 9 ) scene_info( payloadSize ) 5 else if( payloadType == 10 ) sub_seq_info( payloadSize ) 5 else if( payloadType == 11 ) sub_seq_layer_characteristics( payloadSize ) 5 else if( payloadType == 12 ) sub_seq_characteristics( payloadSize ) 5 else if( payloadType == 13 ) full_frame_freeze( payloadSize ) 5 else if( payloadType == 14 ) full_frame_freeze_release( payloadSize ) 5 else if( payloadType == 15 ) full_frame_snapshot( payloadSize ) 5 else if( payloadType == 16 ) progressive_refinement_segment_start( payloadSize ) 5 else if( payloadType == 17 ) progressive_refinement_segment_end( payloadSize ) 5 else if( payloadType == 18 ) motion_constrained_slice_group_set( payloadSize ) 5 else if( payloadType == 19 ) film_grain_characteristics( payloadSize ) 5 else if( payloadType == 20 ) deblocking_filter_display_preference( payloadSize ) 5 else if( payloadType == 21 ) stereo_video_info( payloadSize ) 5 else reserved_sei_message( payloadSize ) 5 return bit_offset; #endif if( !h264_byte_aligned(bit_offset)){ /* bit_equal_to_one / * equal to 1 * / 5 f(1) */ /* TODO:Display the filler and, error if not 1 ?? */ bit_offset++; while( !h264_byte_aligned(bit_offset)){ /* bit_equal_to_zero / * equal to 0 * / 5 f(1) */ /* TODO:Display the filler and, error if not 0 ?? */ bit_offset++; } } return bit_offset; } /* * 7.3.2.3.1 Supplemental enhancement information message syntax */ static gint dissect_h264_sei_message(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, gint bit_offset) { /* sei_message( ) { C Descriptor */ guint32 payloadType = 0, payloadSize; gint start_bit_offset, length; start_bit_offset = bit_offset; /* while( next_bits( 8 ) == 0xFF ) { */ while( tvb_get_bits8(tvb, bit_offset, 8) == 0xFF ) { /* ff_byte / * equal to 0xFF * / 5 f(8) */ payloadType += 255; bit_offset+=8; } /* last_payload_type_byte 5 u(8) */ payloadType += tvb_get_bits8(tvb, bit_offset, 8); bit_offset+=8; length = (bit_offset - start_bit_offset)>>3; proto_tree_add_uint(tree, hf_h264_payloadtype, tvb, start_bit_offset>>3, length, payloadType); payloadSize = 0; start_bit_offset = bit_offset; /* while( next_bits( 8 ) == 0xFF ) { */ while( tvb_get_bits8(tvb, bit_offset, 8) == 0xFF ) { /* ff_byte / * equal to 0xFF * / 5 f(8) */ payloadSize += 255; bit_offset+=8; } /* last_payload_size_byte 5 u(8) */ /* payloadSize += last_payload_size_byte */ payloadSize += tvb_get_bits8(tvb, bit_offset, 8); bit_offset+=8; length = (bit_offset - start_bit_offset)>>3; proto_tree_add_uint(tree, hf_h264_payloadsize, tvb, start_bit_offset>>3, length, payloadSize); /*sei_payload( payloadType, payloadSize ) 5 */ bit_offset = h264_sei_payload( tree, tvb, pinfo, bit_offset, payloadType, payloadSize); return bit_offset; } /* * 7.3.2.3 Supplemental enhancement information RBSP syntax * sei_rbsp( ) */ static int dissect_h264_sei_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { gint bit_offset; bit_offset = offset <<3; /* do */ /* sei_message( ) 5*/ bit_offset = dissect_h264_sei_message( tree, tvb, pinfo, bit_offset); /* while( more_rbsp_data( ) ) * If there is more data in an RBSP before rbsp_trailing_bits( ), * the return value of more_rbsp_data( ) is equal to TRUE. */ /* rbsp_trailing_bits( ) 5 */ bit_offset = dissect_h264_rbsp_trailing_bits(tree, tvb, pinfo, bit_offset); return bit_offset; } /* Ref 7.3.2.1 Sequence parameter set RBSP syntax */ static int dissect_h264_seq_parameter_set_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, gint offset) { proto_item *level_item; gint bit_offset; guint8 constraint_set3_flag; guint32 level_idc; gint i; guint8 profile_idc, chroma_format_idc, frame_mbs_only_flag, frame_cropping_flag; guint8 pic_order_cnt_type, vui_parameters_present_flag, num_ref_frames_in_pic_order_cnt_cycle; guint8 seq_scaling_matrix_present_flag; /* seq_scaling_list_present_flag */ /* profile_idc 0 u(8) */ profile_idc = tvb_get_guint8(tvb,offset); proto_tree_add_item(tree, hf_h264_profile_idc, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; constraint_set3_flag = (tvb_get_guint8(tvb,offset)&0x10)>>4; /* constraint_set0_flag 0 u(1) */ proto_tree_add_item(tree, hf_h264_constraint_set0_flag, tvb, offset, 1, ENC_BIG_ENDIAN); /* constraint_set1_flag 0 u(1) */ proto_tree_add_item(tree, hf_h264_constraint_set1_flag, tvb, offset, 1, ENC_BIG_ENDIAN); /* constraint_set2_flag 0 u(1) */ proto_tree_add_item(tree, hf_h264_constraint_set2_flag, tvb, offset, 1, ENC_BIG_ENDIAN); /* constraint_set3_flag 0 u(1) */ proto_tree_add_item(tree, hf_h264_constraint_set3_flag, tvb, offset, 1, ENC_BIG_ENDIAN); /* reserved_zero_4bits equal to 0 0 u(4)*/ proto_tree_add_item(tree, hf_h264_reserved_zero_4bits, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; /* level_idc 0 u(8) */ level_idc = tvb_get_guint8(tvb,offset); level_item = proto_tree_add_item(tree, hf_h264_level_idc, tvb, offset, 1, ENC_BIG_ENDIAN); if((level_idc==11)&&(constraint_set3_flag==1)){ proto_item_append_text(level_item,"[Level 1b]"); }else{ proto_item_append_text(level_item," [Level %.1f %s]",((double)level_idc/10),val_to_str(level_idc, h264_level_bitrate_values, "Unknown ")); } offset++; /* seq_parameter_set_id 0 ue(v) * ue(v): unsigned integer Exp-Golomb-coded syntax element with the left bit first. * The parsing process for this descriptor is specified in subclause 9.1. */ bit_offset = offset<<3; dissect_h264_exp_golomb_code(tree, hf_h264_seq_parameter_set_id, tvb, &bit_offset, H264_UE_V); if( profile_idc == 100 || profile_idc == 110 || profile_idc == 122 || profile_idc == 144 ) { /* chroma_format_idc 0 ue(v) */ chroma_format_idc = dissect_h264_exp_golomb_code(tree, hf_h264_chroma_format_idc, tvb, &bit_offset, H264_UE_V); if( chroma_format_idc == 3 ){ /* residual_colour_transform_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_residual_colour_transform_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; } /* bit_depth_luma_minus8 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_bit_depth_luma_minus8, tvb, &bit_offset, H264_UE_V); /* bit_depth_chroma_minus8 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_bit_depth_chroma_minus8, tvb, &bit_offset, H264_UE_V); /* qpprime_y_zero_transform_bypass_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_qpprime_y_zero_transform_bypass_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* seq_scaling_matrix_present_flag 0 u(1) */ seq_scaling_matrix_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_seq_scaling_matrix_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( seq_scaling_matrix_present_flag ){ /* for( i = 0; i < 8; i++ ) { / seq_scaling_list_present_flag[ i ] 0 u(1) / seq_scaling_list_present_flag = tvb_get_bits8(tvb, bit_offset, 1); bit_offset++; if( seq_scaling_list_present_flag){ if( i < 6 ) scaling_list( ScalingList4x4[ i ], 16,UseDefaultScalingMatrix4x4Flag[ i ])0 dissect_h264_scaling_list() else scaling_list( ScalingList8x8[ i - 6 ], 64,UseDefaultScalingMatrix8x8Flag[ i - 6 ] )0 } } */ proto_tree_add_text(tree, tvb, offset, -1, "[Not decoded yet]"); return -1; } } /* log2_max_frame_num_minus4 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_log2_max_frame_num_minus4, tvb, &bit_offset, H264_UE_V); /* pic_order_cnt_type 0 ue(v) */ pic_order_cnt_type = dissect_h264_exp_golomb_code(tree,hf_h264_pic_order_cnt_type, tvb, &bit_offset, H264_UE_V); if(pic_order_cnt_type == 0){ /* log2_max_pic_order_cnt_lsb_minus4 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_log2_max_pic_order_cnt_lsb_minus4, tvb, &bit_offset, H264_UE_V); }else if(pic_order_cnt_type == 1) { /* delta_pic_order_always_zero_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_delta_pic_order_always_zero_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* offset_for_non_ref_pic 0 se(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_offset_for_non_ref_pic, tvb, &bit_offset, H264_SE_V); /* offset_for_top_to_bottom_field 0 se(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_offset_for_top_to_bottom_field, tvb, &bit_offset, H264_SE_V); /* num_ref_frames_in_pic_order_cnt_cycle 0 ue(v) */ num_ref_frames_in_pic_order_cnt_cycle = dissect_h264_exp_golomb_code(tree, hf_h264_num_ref_frames_in_pic_order_cnt_cycle, tvb, &bit_offset, H264_UE_V); for( i = 0; i < num_ref_frames_in_pic_order_cnt_cycle; i++ ){ /*offset_for_ref_frame[ i ] 0 se(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_offset_for_ref_frame, tvb, &bit_offset, H264_SE_V); } } /* num_ref_frames 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_num_ref_frames, tvb, &bit_offset, H264_UE_V); /* gaps_in_frame_num_value_allowed_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_gaps_in_frame_num_value_allowed_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* pic_width_in_mbs_minus1 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_pic_width_in_mbs_minus1, tvb, &bit_offset, H264_UE_V); /* pic_height_in_map_units_minus1 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_pic_height_in_map_units_minus1, tvb, &bit_offset, H264_UE_V); /* frame_mbs_only_flag 0 u(1) */ frame_mbs_only_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_frame_mbs_only_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( !frame_mbs_only_flag ){ /* mb_adaptive_frame_field_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_mb_adaptive_frame_field_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; } /* direct_8x8_inference_flag 0 u(1) */ proto_tree_add_bits_item(tree, hf_h264_direct_8x8_inference_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* frame_cropping_flag 0 u(1) */ frame_cropping_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_frame_cropping_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if(frame_cropping_flag) { /* frame_crop_left_offset 0 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_frame_crop_left_offset, tvb, &bit_offset, H264_UE_V); dissect_h264_exp_golomb_code(tree,hf_h264_frame_crop_right_offset, tvb, &bit_offset, H264_UE_V); dissect_h264_exp_golomb_code(tree, hf_h264_frame_crop_top_offset, tvb, &bit_offset, H264_UE_V); dissect_h264_exp_golomb_code(tree, hf_h264_frame_crop_bottom_offset, tvb, &bit_offset, H264_UE_V); } /* vui_parameters_present_flag 0 u(1) */ vui_parameters_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_vui_parameters_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if(vui_parameters_present_flag){ bit_offset = dissect_h264_vui_parameters(tree, tvb, pinfo, bit_offset); } /* rbsp_trailing_bits( ) 0 */ bit_offset = dissect_h264_rbsp_trailing_bits(tree, tvb, pinfo, bit_offset); offset = bit_offset>>3; return offset; } /* 7.3.2.2 Picture parameter set RBSP syntax */ static void dissect_h264_pic_parameter_set_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo, gint offset) { gint bit_offset; guint32 num_slice_groups_minus1, pic_scaling_matrix_present_flag; bit_offset = offset<<3; /* pic_parameter_set_id 1 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_pic_parameter_set_id, tvb, &bit_offset, H264_UE_V); /* seq_parameter_set_id 1 ue(v) */ dissect_h264_exp_golomb_code(tree, hf_h264_seq_parameter_set_id, tvb, &bit_offset, H264_UE_V); /* entropy_coding_mode_flag 1 u(1) */ proto_tree_add_bits_item(tree, hf_h264_entropy_coding_mode_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* pic_order_present_flag 1 u(1)*/ proto_tree_add_bits_item(tree, hf_h264_pic_order_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* num_slice_groups_minus1 1 ue(v)*/ num_slice_groups_minus1 = dissect_h264_exp_golomb_code(tree, hf_h264_num_slice_groups_minus1, tvb, &bit_offset, H264_UE_V); if( num_slice_groups_minus1 > 0 ) { /* slice_group_map_type 1 ue(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_slice_group_map_type, tvb, &bit_offset, H264_UE_V); /* slice_group_map_type = dissect_h264_exp_golomb_code(tree, hf_h264_slice_group_map_type, tvb, &bit_offset, H264_UE_V);*/ /* if( slice_group_map_type == 0 )*/ /* for( iGroup = 0; iGroup <= num_slice_groups_minus1; iGroup++ )*/ /* run_length_minus1[ iGroup ] 1 ue(v)*/ /* else if( slice_group_map_type == 2 )*/ /* for( iGroup = 0; iGroup < num_slice_groups_minus1; iGroup++ ) {*/ /* top_left[ iGroup ] 1 ue(v)*/ /* bottom_right[ iGroup ] 1 ue(v)*/ /* }*/ /* else if( slice_group_map_type == 3 ||*/ /* slice_group_map_type == 4 ||*/ /* slice_group_map_type == 5 ) {*/ /* slice_group_change_direction_flag 1 u(1)*/ /* slice_group_change_rate_minus1 1 ue(v)*/ /* } else if( slice_group_map_type == 6 ) {*/ /* pic_size_in_map_units_minus1 1 ue(v)*/ /* for( i = 0; i <= pic_size_in_map_units_minus1; i++ )*/ /* slice_group_id[ i ] 1 u(v)*/ /* }*/ /* }*/ proto_tree_add_text(tree, tvb, bit_offset>>3, -1, "[Not decoded yet]"); return; } /* num_ref_idx_l0_active_minus1 1 ue(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_num_ref_idx_l0_active_minus1, tvb, &bit_offset, H264_UE_V); /* num_ref_idx_l1_active_minus1 1 ue(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_num_ref_idx_l1_active_minus1, tvb, &bit_offset, H264_UE_V); /* weighted_pred_flag 1 u(1)*/ proto_tree_add_bits_item(tree, hf_h264_weighted_pred_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* weighted_bipred_idc 1 u(2)*/ proto_tree_add_bits_item(tree, hf_h264_weighted_bipred_idc, tvb, bit_offset, 2, ENC_BIG_ENDIAN); bit_offset= bit_offset+2; /* pic_init_qp_minus26 * relative to 26 * 1 se(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_pic_init_qp_minus26, tvb, &bit_offset, H264_SE_V); /* pic_init_qs_minus26 * relative to 26 * 1 se(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_pic_init_qs_minus26, tvb, &bit_offset, H264_SE_V); /* chroma_qp_index_offset 1 se(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_chroma_qp_index_offset, tvb, &bit_offset, H264_SE_V); /* deblocking_filter_control_present_flag 1 u(1)*/ proto_tree_add_bits_item(tree, hf_h264_deblocking_filter_control_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* constrained_intra_pred_flag 1 u(1)*/ proto_tree_add_bits_item(tree, hf_h264_constrained_intra_pred_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* redundant_pic_cnt_present_flag 1 u(1)*/ proto_tree_add_bits_item(tree, hf_h264_redundant_pic_cnt_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( more_rbsp_data(tree, tvb, pinfo, bit_offset)){ /* transform_8x8_mode_flag 1 u(1)*/ proto_tree_add_bits_item(tree, hf_h264_transform_8x8_mode_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; /* pic_scaling_matrix_present_flag 1 u(1)*/ pic_scaling_matrix_present_flag = tvb_get_bits8(tvb, bit_offset, 1); proto_tree_add_bits_item(tree, hf_h264_pic_scaling_matrix_present_flag, tvb, bit_offset, 1, ENC_BIG_ENDIAN); bit_offset++; if( pic_scaling_matrix_present_flag ){ proto_tree_add_text(tree, tvb, bit_offset>>3, -1, "[Not decoded yet]"); return; /* for( i = 0; i < 6 + 2* transform_8x8_mode_flag; i++ ) {*/ /* pic_scaling_list_present_flag[ i ] 1 u(1)*/ /* if( pic_scaling_list_present_flag[ i ] )*/ /* if( i < 6 )*/ /* scaling_list( ScalingList4x4[ i ], 16, UseDefaultScalingMatrix4x4Flag[ i ] )*/ /* else*/ /* scaling_list( ScalingList8x8[ i - 6 ], 64, UseDefaultScalingMatrix8x8Flag[ i - 6 ] )*/ /* }*/ } /* second_chroma_qp_index_offset 1 se(v)*/ dissect_h264_exp_golomb_code(tree, hf_h264_second_chroma_qp_index_offset, tvb, &bit_offset, H264_SE_V); } bit_offset = dissect_h264_rbsp_trailing_bits(tree, tvb, pinfo, bit_offset); } /* * 7.3.2.4 Access unit delimiter RBSP syntax * access_unit_delimiter_rbsp( ) */ static void dissect_h264_access_unit_delimiter_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { /* primary_pic_type 6 u(3) */ /* rbsp_trailing_bits( ) 6 */ proto_tree_add_text(tree, tvb, offset, -1, "[Not decoded yet]"); } /* * 7.3.2.5 End of sequence RBSP syntax * end_of_seq_rbsp( ) {} */ static void dissect_h264_end_of_seq_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { proto_tree_add_text(tree, tvb, offset, -1, "[Not decoded yet]"); } /* * 7.3.2.6 End of stream RBSP syntax * end_of_stream_rbsp( ) {} */ static void dissect_h264_end_of_stream_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { proto_tree_add_text(tree, tvb, offset, -1, "[Not decoded yet]"); } /* * 7.3.2.7 Filler data RBSP syntax * filler_data_rbsp( ) */ static void dissect_h264_filler_data_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { /* while( next_bits( 8 ) == 0xFF ) */ /* ff_byte * equal to 0xFF * 9 f(8) */ /* rbsp_trailing_bits( ) 9 */ proto_tree_add_text(tree, tvb, offset, -1, "[Not decoded yet]"); } /* * 7.3.2.1.2 Sequence parameter set extension RBSP syntax * seq_parameter_set_extension_rbsp( ) */ static void dissect_h264_seq_parameter_set_extension_rbsp(proto_tree *tree, tvbuff_t *tvb, packet_info *pinfo _U_, gint offset) { /* seq_parameter_set_id 10 ue(v) */ /* aux_format_idc 10 ue(v) */ /* if( aux_format_idc != 0 ) { */ /* bit_depth_aux_minus8 10 ue(v) */ /* alpha_incr_flag 10 u(1) */ /* alpha_opaque_value 10 u(v) */ /* alpha_transparent_value 10 u(v) */ /* } */ /* additional_extension_flag 10 u(1) */ /* rbsp_trailing_bits() 10 */ proto_tree_add_text(tree, tvb, offset, -1, "[Not decoded yet]"); } /* * Dissect NAL unit as recived in sprop-parameter-sets of SDP * or "DecoderConfiguration parameter in H.245 */ void dissect_h264_nal_unit(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) { proto_item *item; proto_tree *h264_nal_tree; gint offset = 0; guint8 nal_unit_type; guint32 dword; item = proto_tree_add_item(tree, hf_h264_nal_unit, tvb, offset, -1, ENC_NA); h264_nal_tree = proto_item_add_subtree(item, ett_h264_nal_unit); startover: /* In decoder configuration start code may be pressent * B.1.1 Byte stream NAL unit syntax */ dword = tvb_get_bits32(tvb, offset<<3, 32, ENC_BIG_ENDIAN); if(dword==1){ /* zero_byte + start_code_prefix_one_3bytes */ offset+=4; }else if((dword >> 8)== 1){ /* start_code_prefix_one_3bytes */ offset+= 3; } /* Ref: 7.3.1 NAL unit syntax */ nal_unit_type = tvb_get_guint8(tvb,offset) & 0x1f; /* forbidden_zero_bit All f(1) */ proto_tree_add_item(h264_nal_tree, hf_h264_forbidden_zero_bit, tvb, offset, 1, ENC_BIG_ENDIAN); /* nal_ref_idc All u(2) */ proto_tree_add_item(h264_nal_tree, hf_h264_nal_ref_idc, tvb, offset, 1, ENC_BIG_ENDIAN); /* nal_unit_type All u(5) */ proto_tree_add_item(h264_nal_tree, hf_h264_nal_unit_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; switch(nal_unit_type){ case 0: /* Unspecified */ proto_tree_add_text(h264_nal_tree, tvb, offset, -1, "Unspecified NAL unit type"); break; case 1: /* Coded slice of a non-IDR picture */ dissect_h264_slice_layer_without_partitioning_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 2: /* Coded slice data partition A */ dissect_h264_slice_data_partition_a_layer_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 3: /* Coded slice data partition B */ dissect_h264_slice_data_partition_b_layer_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 4: /* Coded slice data partition C */ dissect_h264_slice_data_partition_c_layer_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 5: /* Coded slice of an IDR picture */ dissect_h264_slice_layer_without_partitioning_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 6: /* Supplemental enhancement information (SEI) */ dissect_h264_sei_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case H264_SEQ_PAR_SET: /* 7 Sequence parameter set*/ offset = dissect_h264_seq_parameter_set_rbsp(h264_nal_tree, tvb, pinfo, offset); /* A bit ugly */ if(tvb_length_remaining(tvb,offset) > 0){ /* In this case length = offset as we start from zero */ proto_item_set_len(item, offset/*Length */); item = proto_tree_add_item(tree, hf_h264_nal_unit, tvb, offset, -1, ENC_NA); h264_nal_tree = proto_item_add_subtree(item, ett_h264_nal_unit); goto startover; } break; case H264_PIC_PAR_SET: /* 8 Picture parameter set */ dissect_h264_pic_parameter_set_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 9: /* Access unit delimiter */ dissect_h264_access_unit_delimiter_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 10: /* End of sequence */ dissect_h264_end_of_seq_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 11: /* End of stream */ dissect_h264_end_of_stream_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 12: /* Filler data */ dissect_h264_filler_data_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 13: /* Sequence parameter set extension */ dissect_h264_seq_parameter_set_extension_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 14: /* Reserved */ case 15: /* Reserved */ case 16: /* Reserved */ case 17: /* Reserved */ case 18: /* Reserved */ proto_tree_add_text(h264_nal_tree, tvb, offset, -1, "Reserved NAL unit type"); break; case 19: /* Coded slice of an auxiliary coded picture without partitioning */ dissect_h264_slice_layer_without_partitioning_rbsp(tree, tvb, pinfo, offset); break; case 28: dissect_h264_slice_layer_without_partitioning_rbsp(tree, tvb, pinfo, offset); break; default: /* 24..31 Unspecified */ proto_tree_add_text(h264_nal_tree, tvb, offset, -1, "Unspecified NAL unit type"); break; } } /* Code to actually dissect the packets */ static void dissect_h264(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { int offset = 0; proto_item *item, *ti, *stream_item, *fua_item; proto_tree *h264_tree, *h264_nal_tree, *stream_tree, *fua_tree; guint8 type; /* Make entries in Protocol column and Info column on summary display */ col_set_str(pinfo->cinfo, COL_PROTOCOL, "H264"); if (tree) { item = proto_tree_add_item(tree, proto_h264, tvb, 0, -1, ENC_NA); h264_tree = proto_item_add_subtree(item, ett_h264); type = tvb_get_guint8(tvb,offset)&0x1f; /* if the type is 28, it would be draw another title */ if(type == 28) ti = proto_tree_add_text(h264_tree, tvb, offset, 1, "FU identifier"); else ti = proto_tree_add_text(h264_tree, tvb, offset, 1, "NAL unit header or first byte of the payload"); h264_nal_tree = proto_item_add_subtree(ti, ett_h264_nal); /* +---------------+ * |0|1|2|3|4|5|6|7| * +-+-+-+-+-+-+-+-+ * |F|NRI| Type | * +---------------+ */ /* F: 1 bit * forbidden_zero_bit. A value of 0 indicates that the NAL unit type * octet and payload should not contain bit errors or other syntax * violations. A value of 1 indicates that the NAL unit type octet * and payload may contain bit errors or other syntax violations. */ proto_tree_add_item(h264_nal_tree, hf_h264_nal_f_bit, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(h264_nal_tree, hf_h264_nal_nri, tvb, offset, 1, ENC_BIG_ENDIAN); col_append_fstr(pinfo->cinfo, COL_INFO, " %s", val_to_str(type, h264_type_values, "Unknown Type (%u)")); proto_tree_add_item(h264_nal_tree, hf_h264_type, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; if (type == 28){ fua_item = proto_tree_add_text(h264_tree, tvb, offset, 1, "FU Header"); fua_tree = proto_item_add_subtree(fua_item, ett_h264_fua); proto_tree_add_item(fua_tree, hf_h264_start_bit, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(fua_tree, hf_h264_end_bit, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(fua_tree, hf_h264_forbidden_bit, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item(fua_tree, hf_h264_nal_unit_type, tvb, offset, 1, ENC_BIG_ENDIAN); if ( (tvb_get_guint8(tvb,offset)&0x80) == 0x80 ){ type = tvb_get_guint8(tvb,offset)&0x1f; offset++; } else return; } stream_item =proto_tree_add_text(h264_tree, tvb, offset, -1, "H264 bitstream"); stream_tree = proto_item_add_subtree(stream_item, ett_h264_stream); switch(type){ case 1: /* 1 Coded slice of a non-IDR picture */ dissect_h264_slice_layer_without_partitioning_rbsp(stream_tree, tvb, pinfo, offset); break; case 3: /* Coded slice data partition B */ dissect_h264_slice_data_partition_b_layer_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 4: /* Coded slice data partition C */ dissect_h264_slice_data_partition_c_layer_rbsp(h264_nal_tree, tvb, pinfo, offset); break; case 5: /* Coded slice of an IDR picture */ dissect_h264_slice_layer_without_partitioning_rbsp(stream_tree, tvb, pinfo, offset); break; case 6: /* Supplemental enhancement information (SEI) */ dissect_h264_sei_rbsp(stream_tree, tvb, pinfo, offset); break; case H264_SEQ_PAR_SET: /* 7 Sequence parameter set*/ dissect_h264_seq_parameter_set_rbsp(stream_tree, tvb, pinfo, offset); break; case H264_PIC_PAR_SET: /* 8 Picture parameter set */ dissect_h264_pic_parameter_set_rbsp(stream_tree, tvb, pinfo, offset); break; case 19: /* Coded slice of an auxiliary coded picture without partitioning */ dissect_h264_slice_layer_without_partitioning_rbsp(stream_tree, tvb, pinfo, offset); break; default: break; } }/* if tree */ } /* Capability */ static const int *profile_fields[] = { &hf_h264_par_profile_b, &hf_h264_par_profile_m, &hf_h264_par_profile_e, &hf_h264_par_profile_h, &hf_h264_par_profile_h10, &hf_h264_par_profile_h4_2_2, &hf_h264_par_profile_h4_4_4, NULL }; static int dissect_h264_par_profile(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) { int offset = 0; proto_tree_add_bitmask(tree, tvb, offset, hf_h264_par_profile, ett_h264_par_profile, profile_fields, ENC_BIG_ENDIAN); offset += 1; return offset; } static const int *AdditionalModesSupported_fields[] = { &hf_h264_par_add_mode_sup_rcdo, NULL }; static int dissect_h264_par_AdditionalModesSupported(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) { int offset = 0; proto_tree_add_bitmask(tree, tvb, offset, hf_h264_par_AdditionalModesSupported, ett_h264_par_AdditionalModesSupported, AdditionalModesSupported_fields, ENC_BIG_ENDIAN); offset += 1; return offset; } static const int *ProfileIOP_fields[] = { &hf_h264_par_constraint_set0_flag, &hf_h264_par_constraint_set1_flag, &hf_h264_par_constraint_set2_flag, NULL }; static int dissect_h264_ProfileIOP(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) { int offset = 0; proto_tree_add_bitmask(tree, tvb, offset, hf_h264_par_ProfileIOP, ett_h264_par_ProfileIOP, ProfileIOP_fields, ENC_BIG_ENDIAN); offset += 1; return offset; } static const value_string h264_par_level_values[] = { { 15, "1" }, { 19, "1b" }, { 22, "1.1" }, { 29, "1.2" }, { 36, "1.3" }, { 43, "2" }, { 50, "2.1" }, { 57, "2.2" }, { 64, "3" }, { 71, "3.1" }, { 78, "3.2" }, { 85, "4" }, { 92, "4.1" }, { 99, "4.2" }, { 106, "5" }, { 113 , "5.1" }, { 0, NULL } }; static int dissect_h264_par_level(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree _U_) { int offset = 0; guint16 lvl; const gchar *p = NULL; asn1_ctx_t *actx; actx = get_asn1_ctx(pinfo->private_data); DISSECTOR_ASSERT(actx); lvl = tvb_get_ntohs(tvb, offset); p = match_strval(lvl, VALS(h264_par_level_values)); if (p) { proto_item_append_text(actx->created_item, " - Level %s", p); } offset += 2; return offset; } static int dissect_h264_par_DecoderConfigurationInformation(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree _U_) { asn1_ctx_t *actx; actx = get_asn1_ctx(pinfo->private_data); DISSECTOR_ASSERT(actx); dissect_h264_nal_unit(tvb, pinfo, tree); return tvb_length(tvb); } typedef struct _h264_capability_t { const gchar *id; const gchar *name; new_dissector_t content_pdu; } h264_capability_t; static h264_capability_t h264_capability_tab[] = { /* ITU-T H.241 (05/2006), 8.3 H.264 capabilities */ { "GenericCapability/0.0.8.241.0.0.1", "ITU-T Rec. H.241 H.264 Video Capabilities", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/41", "Profile", dissect_h264_par_profile }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/42", "Level", dissect_h264_par_level }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/3" , "CustomMaxMBPS", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/4" , "CustomMaxFS", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/5" , "CustomMaxDPB", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/6" , "CustomMaxBRandCPB", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/7" , "MaxStaticMBPS", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/8" , "max-rcmd-nal-unit-size", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/9" , "max-nal-unit-size", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/10", "SampleAspectRatiosSupported", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/11", "AdditionalModesSupported", dissect_h264_par_AdditionalModesSupported }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/12", "AdditionalDisplayCapabilities", NULL }, /* TS 26.111 H.264 */ { "GenericCapability/0.0.8.241.0.0.1/nonCollapsing/43" , "DecoderConfigurationInformation", dissect_h264_par_DecoderConfigurationInformation }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/44" , "AcceptRedundantSlices", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/45" , "NalAlignedMode", NULL }, { "GenericCapability/0.0.8.241.0.0.1/collapsing/46" , "ProfileIOP", dissect_h264_ProfileIOP }, { NULL, NULL, NULL }, }; static h264_capability_t *find_cap(const gchar *id) { h264_capability_t *ftr = NULL; h264_capability_t *f; for (f=h264_capability_tab; f->id; f++) { if (!strcmp(id, f->id)) { ftr = f; break; } } return ftr; } static void dissect_h264_name(tvbuff_t *tvb _U_, packet_info *pinfo, proto_tree *tree) { asn1_ctx_t *actx; h264_capability_t *ftr = NULL; actx = get_asn1_ctx(pinfo->private_data); DISSECTOR_ASSERT(actx); if (tree) { ftr = find_cap(pinfo->match_string); if (ftr) { proto_item_append_text(actx->created_item, " - %s", ftr->name); proto_item_append_text(proto_item_get_parent(proto_tree_get_parent(tree)), ": %s", ftr->name); } else { proto_item_append_text(actx->created_item, " - unknown(%s)", pinfo->match_string); } } } static void range_delete_h264_rtp_pt_callback(guint32 rtp_pt) { if (rtp_pt >= 96 && rtp_pt <= 127) dissector_delete_uint("rtp.pt", rtp_pt, h264_handle); } static void range_add_h264_rtp_pt_callback(guint32 rtp_pt) { if (rtp_pt >= 96 && rtp_pt <= 127) dissector_add_uint("rtp.pt", rtp_pt, h264_handle); } /* Register the protocol with Wireshark */ /* If this dissector uses sub-dissector registration add a registration routine. This format is required because a script is used to find these routines and create the code that calls these routines. */ void proto_reg_handoff_h264(void) { static range_t *dynamic_payload_type_range = NULL; static gboolean h264_prefs_initialized = FALSE; if (!h264_prefs_initialized) { dissector_handle_t h264_name_handle; h264_capability_t *ftr; h264_handle = find_dissector("h264"); dissector_add_string("rtp_dyn_payload_type","H264", h264_handle); h264_name_handle = create_dissector_handle(dissect_h264_name, proto_h264); for (ftr=h264_capability_tab; ftr->id; ftr++) { if (ftr->name) dissector_add_string("h245.gef.name", ftr->id, h264_name_handle); if (ftr->content_pdu) dissector_add_string("h245.gef.content", ftr->id, new_create_dissector_handle(ftr->content_pdu, proto_h264)); } h264_prefs_initialized = TRUE; } else { range_foreach(dynamic_payload_type_range, range_delete_h264_rtp_pt_callback); g_free(dynamic_payload_type_range); } dynamic_payload_type_range = range_copy(temp_dynamic_payload_type_range); range_foreach(dynamic_payload_type_range, range_add_h264_rtp_pt_callback); } /* this format is required because a script is used to build the C function that calls all the protocol registration. */ void proto_register_h264(void) { module_t *h264_module; /* Setup list of header fields See Section 1.6.1 for details*/ static hf_register_info hf[] = { { &hf_h264_nal_f_bit, { "F bit", "h264.f", FT_BOOLEAN, 8, TFS(&h264_f_bit_vals), 0x80, NULL, HFILL } }, { &hf_h264_nal_nri, { "Nal_ref_idc (NRI)", "h264.nal_nri", FT_UINT8, BASE_DEC, NULL, 0x60, NULL, HFILL } }, { &hf_h264_type, { "Type", "h264.nal_unit_hdr", FT_UINT8, BASE_DEC, VALS(h264_type_values), 0x1f, NULL, HFILL } }, { &hf_h264_start_bit, { "Start bit", "h264.start.bit", FT_BOOLEAN, 8, TFS(&h264_start_bit_vals), 0x80, NULL, HFILL } }, { &hf_h264_end_bit, { "End bit", "h264.end.bit", FT_BOOLEAN, 8, TFS(&h264_end_bit_vals), 0x40, NULL, HFILL } }, { &hf_h264_forbidden_bit, { "Forbidden bit", "h264.forbidden.bit", FT_UINT8, BASE_DEC, NULL, 0x20, NULL, HFILL } }, { &hf_h264_profile, { "Profile", "h264.profile", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_h264_profile_idc, { "Profile_idc", "h264.profile_idc", FT_UINT8, BASE_DEC, VALS(h264_profile_idc_values), 0xff, NULL, HFILL } }, { &hf_h264_rbsp_stop_bit, { "rbsp_stop_bit", "h264.rbsp_stop_bit", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_rbsp_trailing_bits, { "rbsp_trailing_bits", "h264.rbsp_trailing_bits", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_constraint_set0_flag, { "Constraint_set0_flag", "h264.constraint_set0_flag", FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL } }, { &hf_h264_constraint_set1_flag, { "Constraint_set1_flag", "h264.constraint_set1_flag", FT_UINT8, BASE_DEC, NULL, 0x40, NULL, HFILL } }, { &hf_h264_constraint_set2_flag, { "Constraint_set2_flag", "h264.constraint_set2_flag", FT_UINT8, BASE_DEC, NULL, 0x20, NULL, HFILL } }, { &hf_h264_constraint_set3_flag, { "Constraint_set3_flag", "h264.constraint_set3_flag", FT_UINT8, BASE_DEC, NULL, 0x10, NULL, HFILL } }, { &hf_h264_reserved_zero_4bits, { "Reserved_zero_4bits", "h264.reserved_zero_4bits", FT_UINT8, BASE_DEC, NULL, 0x0f, NULL, HFILL } }, { &hf_h264_level_idc, { "Level_id", "h264.level_id", FT_UINT8, BASE_DEC, NULL, 0xff, NULL, HFILL } }, { &hf_h264_nal_unit, { "NAL unit", "h264.nal_unit", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_h264_forbidden_zero_bit, { "Forbidden_zero_bit", "h264.forbidden_zero_bit", FT_UINT8, BASE_DEC, NULL, 0x80, NULL, HFILL } }, { &hf_h264_nal_ref_idc, { "Nal_ref_idc", "h264.nal_ref_idc", FT_UINT8, BASE_DEC, NULL, 0x60, NULL, HFILL } }, {&hf_h264_nal_unit_type, { "Nal_unit_type", "h264.nal_unit_type", FT_UINT8, BASE_DEC, VALS(h264_nal_unit_type_vals), 0x1f, NULL, HFILL } }, { &hf_h264_seq_parameter_set_id, { "seq_parameter_set_id", "h264.seq_parameter_set_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_chroma_format_idc, { "chroma_format_id", "h264.chroma_format_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_residual_colour_transform_flag, { "residual_colour_transform_flag", "h264.residual_colour_transform_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_bit_depth_luma_minus8, { "bit_depth_luma_minus8", "h264.bit_depth_luma_minus8", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_bit_depth_chroma_minus8, { "bit_depth_chroma_minus8", "h264.bit_depth_chroma_minus8", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_qpprime_y_zero_transform_bypass_flag, { "qpprime_y_zero_transform_bypass_flag", "h264.qpprime_y_zero_transform_bypass_flag", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_seq_scaling_matrix_present_flag, { "seq_scaling_matrix_present_flag", "h264.seq_scaling_matrix_present_flag", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_log2_max_frame_num_minus4, { "log2_max_frame_num_minus4", "h264.log2_max_frame_num_minus4", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_order_cnt_type, { "pic_order_cnt_type", "h264.pic_order_cnt_type", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_log2_max_pic_order_cnt_lsb_minus4, { "log2_max_pic_order_cnt_lsb_minus4", "h264.log2_max_pic_order_cnt_lsb_minus4", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_delta_pic_order_always_zero_flag, { "delta_pic_order_always_zero_flag", "h264.delta_pic_order_always_zero_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_offset_for_non_ref_pic, { "offset_for_non_ref_pic", "h264.offset_for_non_ref_pic", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_offset_for_top_to_bottom_field, { "offset_for_top_to_bottom_field", "h264.offset_for_top_to_bottom_field", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_num_ref_frames_in_pic_order_cnt_cycle, { "num_ref_frames_in_pic_order_cnt_cycle", "h264.num_ref_frames_in_pic_order_cnt_cycle", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_offset_for_ref_frame, { "offset_for_ref_frame", "h264.offset_for_ref_frame", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_num_ref_frames, { "num_ref_frames", "h264.num_ref_frames", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_gaps_in_frame_num_value_allowed_flag, { "gaps_in_frame_num_value_allowed_flag", "h264.gaps_in_frame_num_value_allowed_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_width_in_mbs_minus1, { "pic_width_in_mbs_minus1", "h264.pic_width_in_mbs_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_height_in_map_units_minus1, { "pic_height_in_map_units_minus1", "h264.pic_height_in_map_units_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_frame_mbs_only_flag, { "frame_mbs_only_flag", "h264.frame_mbs_only_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_mb_adaptive_frame_field_flag, { "mb_adaptive_frame_field_flag", "h264.mb_adaptive_frame_field_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_direct_8x8_inference_flag, { "direct_8x8_inference_flag", "h264.direct_8x8_inference_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_frame_cropping_flag, { "frame_cropping_flag", "h264.frame_cropping_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_frame_crop_left_offset, { "frame_crop_left_offset", "h264.frame_crop_left_offset", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_frame_crop_right_offset, { "frame_crop_left_offset", "h264.frame_crop_right_offset", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_frame_crop_top_offset, { "frame_crop_top_offset", "h264.frame_crop_top_offset", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_frame_crop_bottom_offset, { "frame_crop_bottom_offset", "h264.frame_crop_bottom_offset", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_vui_parameters_present_flag, { "vui_parameters_present_flag", "h264.vui_parameters_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_parameter_set_id, { "pic_parameter_set_id", "h264.pic_parameter_set_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_entropy_coding_mode_flag, { "entropy_coding_mode_flag", "h264.entropy_coding_mode_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_order_present_flag, { "pic_order_present_flag", "h264.pic_order_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_num_slice_groups_minus1, { "num_slice_groups_minus1", "h264.num_slice_groups_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_slice_group_map_type, { "slice_group_map_type", "h264.slice_group_map_type", FT_UINT32, BASE_DEC, VALS(h264_slice_group_map_type_vals), 0x0, NULL, HFILL } }, { &hf_h264_num_ref_idx_l0_active_minus1, { "num_ref_idx_l0_active_minus1", "h264.num_ref_idx_l0_active_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_num_ref_idx_l1_active_minus1, { "num_ref_idx_l1_active_minus1", "h264.num_ref_idx_l1_active_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_weighted_pred_flag, { "weighted_pred_flag", "h264.weighted_pred_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_weighted_bipred_idc, { "weighted_bipred_idc", "h264.weighted_bipred_idc", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_init_qp_minus26, { "pic_init_qp_minus26", "h264.pic_init_qp_minus26", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_init_qs_minus26, { "pic_init_qs_minus26", "h264.pic_init_qs_minus26", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_chroma_qp_index_offset, { "chroma_qp_index_offset", "h264.chroma_qp_index_offset", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_deblocking_filter_control_present_flag, { "deblocking_filter_control_present_flag", "h264.deblocking_filter_control_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_constrained_intra_pred_flag, { "constrained_intra_pred_flag", "h264.constrained_intra_pred_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_redundant_pic_cnt_present_flag, { "redundant_pic_cnt_present_flag", "h264.redundant_pic_cnt_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_transform_8x8_mode_flag, { "transform_8x8_mode_flag", "h264.transform_8x8_mode_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_scaling_matrix_present_flag, { "pic_scaling_matrix_present_flag", "h264.pic_scaling_matrix_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_second_chroma_qp_index_offset, { "second_chroma_qp_index_offset", "h264.second_chroma_qp_index_offset", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_aspect_ratio_info_present_flag, { "aspect_ratio_info_present_flag", "h264.aspect_ratio_info_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_aspect_ratio_idc, { "aspect_ratio_idc", "h264.aspect_ratio_idc", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_sar_width, { "sar_width", "h264.sar_width", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_sar_height, { "sar_height", "h264.sar_height", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_overscan_info_present_flag, { "overscan_info_present_flag", "h264.overscan_info_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_overscan_appropriate_flag, { "overscan_appropriate_flag", "h264.overscan_appropriate_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_video_signal_type_present_flag, { "video_signal_type_present_flag", "h264.video_signal_type_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_video_format, { "video_format", "h264.video_format", FT_UINT8, BASE_DEC, VALS(h264_video_format_vals), 0x0, NULL, HFILL } }, { &hf_h264_video_full_range_flag, { "video_full_range_flag", "h264.video_full_range_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_colour_description_present_flag, { "colour_description_present_flag", "h264.colour_description_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_colour_primaries, { "colour_primaries", "h264.colour_primaries", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_transfer_characteristics, { "transfer_characteristics", "h264.transfer_characteristics", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_matrix_coefficients, { "matrix_coefficients", "h264.matrix_coefficients", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_chroma_loc_info_present_flag, { "chroma_loc_info_present_flag", "h264.chroma_loc_info_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_chroma_sample_loc_type_top_field, { "chroma_sample_loc_type_top_field", "h264.chroma_sample_loc_type_top_field", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_chroma_sample_loc_type_bottom_field, { "chroma_sample_loc_type_bottom_field", "h264.chroma_sample_loc_type_bottom_field", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_timing_info_present_flag, { "timing_info_present_flag", "h264.timing_info_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_num_units_in_tick, { "num_units_in_tick", "h264.num_units_in_tick", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_time_scale, { "time_scale", "h264.time_scale", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_fixed_frame_rate_flag, { "fixed_frame_rate_flag", "h264.fixed_frame_rate_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_nal_hrd_parameters_present_flag, { "nal_hrd_parameters_present_flag", "h264.nal_hrd_parameters_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_vcl_hrd_parameters_present_flag, { "vcl_hrd_parameters_present_flag", "h264.vcl_hrd_parameters_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_low_delay_hrd_flag, { "low_delay_hrd_flag", "h264.low_delay_hrd_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_pic_struct_present_flag, { "pic_struct_present_flag", "h264.pic_struct_present_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_bitstream_restriction_flag, { "bitstream_restriction_flag", "h264.bitstream_restriction_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_motion_vectors_over_pic_boundaries_flag, { "motion_vectors_over_pic_boundaries_flag", "h264.motion_vectors_over_pic_boundaries_flag", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_max_bytes_per_pic_denom, { "max_bytes_per_pic_denom", "h264.max_bytes_per_pic_denom", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_max_bits_per_mb_denom, { "max_bits_per_mb_denom", "h264.max_bits_per_mb_denom", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_log2_max_mv_length_horizontal, { "max_mv_length_horizontal", "h264.max_mv_length_horizontal", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_log2_max_mv_length_vertical, { "log2_max_mv_length_vertical", "h264.log2_max_mv_length_vertical", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_num_reorder_frames, { "num_reorder_frames", "h264.num_reorder_frames", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_max_dec_frame_buffering, { "max_dec_frame_buffering", "h264.max_dec_frame_buffering", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_cpb_cnt_minus1, { "cpb_cnt_minus1", "h264.cpb_cnt_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_bit_rate_scale, { "bit_rate_scale", "h264.bit_rate_scale", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_cpb_size_scale, { "cpb_size_scale", "h264.cpb_size_scale", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_bit_rate_value_minus1, { "bit_rate_value_minus1", "h264.bit_rate_value_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_cpb_size_value_minus1, { "cpb_size_value_minus1", "h264.cpb_size_value_minus1", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_cbr_flag, { "cbr_flag", "h264.cbr_flag", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_initial_cpb_removal_delay_length_minus1, { "initial_cpb_removal_delay_length_minus1", "h264.initial_cpb_removal_delay_length_minus1", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_cpb_removal_delay_length_minus1, { "cpb_removal_delay_length_minus1", "h264.cpb_removal_delay_length_minus1", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_dpb_output_delay_length_minus11, { "dpb_output_delay_length_minus11", "h264.dpb_output_delay_length_minus11", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_time_offset_length, { "time_offset_length", "h264.time_offset_length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_first_mb_in_slice, { "first_mb_in_slice", "h264.first_mb_in_slice", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_slice_type, { "slice_type", "h264.slice_type", FT_UINT32, BASE_DEC, VALS(h264_slice_type_vals), 0x0, NULL, HFILL } }, { &hf_h264_slice_id, { "slice_id", "h264.slice_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_payloadsize, { "PayloadSize", "h264.payloadsize", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_payloadtype, { "payloadType", "h264.payloadtype", FT_UINT32, BASE_DEC, VALS(h264_sei_payload_vals), 0x0, NULL, HFILL } }, { &hf_h264_frame_num, { "frame_num", "h264.frame_num", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_h264_par_profile, { "Profile", "h264.profile", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}}, { &hf_h264_par_profile_b, { "Baseline Profile", "h264.profile.base", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}}, { &hf_h264_par_profile_m, { "Main Profile", "h264.profile.main", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}}, { &hf_h264_par_profile_e, { "Extended Profile.", "h264.profile.ext", FT_BOOLEAN, 8, NULL, 0x10, NULL, HFILL}}, { &hf_h264_par_profile_h, { "High Profile", "h264.profile.high", FT_BOOLEAN, 8, NULL, 0x08, NULL, HFILL}}, { &hf_h264_par_profile_h10, { "High 10 Profile", "h264.profile.high10", FT_BOOLEAN, 8, NULL, 0x04, NULL, HFILL}}, { &hf_h264_par_profile_h4_2_2, { "High 4:2:2 Profile", "h264.profile.high4_2_2", FT_BOOLEAN, 8, NULL, 0x02, NULL, HFILL}}, { &hf_h264_par_profile_h4_4_4, { "High 4:4:4 Profile", "h264.profile.high4_4_4", FT_BOOLEAN, 8, NULL, 0x01, NULL, HFILL}}, { &hf_h264_par_AdditionalModesSupported, { "AdditionalModesSupported", "h264.AdditionalModesSupported", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}}, { &hf_h264_par_add_mode_sup, { "Additional Modes Supported", "h264.add_mode_sup", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}}, { &hf_h264_par_add_mode_sup_rcdo, { "Reduced Complexity Decoding Operation (RCDO) support", "h264.add_mode_sup.rcdo", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}}, { &hf_h264_par_ProfileIOP, { "ProfileIOP", "h264.ProfileIOP", FT_UINT8, BASE_HEX, NULL, 0x00, NULL, HFILL}}, { &hf_h264_par_constraint_set0_flag, { "constraint_set0_flag", "h264.par.constraint_set0_flag", FT_BOOLEAN, 8, NULL, 0x80, NULL, HFILL}}, { &hf_h264_par_constraint_set1_flag, { "constraint_set1_flag", "h264.par.constraint_set1_flag", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL}}, { &hf_h264_par_constraint_set2_flag, { "constraint_set2_flag", "h264.par.constraint_set2_flag", FT_BOOLEAN, 8, NULL, 0x20, NULL, HFILL}}, }; /* Setup protocol subtree array */ static gint *ett[] = { &ett_h264, &ett_h264_profile, &ett_h264_nal, &ett_h264_fua, &ett_h264_stream, &ett_h264_nal_unit, &ett_h264_par_profile, &ett_h264_par_AdditionalModesSupported, &ett_h264_par_ProfileIOP, }; /* Register the protocol name and description */ proto_h264 = proto_register_protocol("H.264","H264", "h264"); /* Required function calls to register the header fields and subtrees used */ proto_register_field_array(proto_h264, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); /* Register a configuration option for port */ h264_module = prefs_register_protocol(proto_h264, proto_reg_handoff_h264); prefs_register_range_preference(h264_module, "dynamic.payload.type", "H264 dynamic payload types", "Dynamic payload types which will be interpreted as H264" "; Values must be in the range 96 - 127", &temp_dynamic_payload_type_range, 127); register_dissector("h264", dissect_h264, proto_h264); }