| File: | builds/wireshark/wireshark/epan/dissectors/packet-smpte-291-vanc.c |
| Warning: | line 2088, column 13 Value stored to 'offset' is never read |
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| 1 | /* packet-smpte-291-vanc.c |
| 2 | * SMPTE ST 291 ancillary-data parsing and built-in VANC application dissectors. |
| 3 | * |
| 4 | * Built-in application payloads implemented in this source file: |
| 5 | * SMPTE ST 12-2, SMPTE ST 2010, SMPTE ST 2016-3, SMPTE ST 2031, |
| 6 | * SMPTE ST 334-2, and Free TV Australia OP-47 / SMPTE RDD 8. |
| 7 | * |
| 8 | * Copyright (c) 2026, Devin Heitmueller <dheitmueller@ltnglobal.com> |
| 9 | * |
| 10 | * Wireshark - Network traffic analyzer |
| 11 | * By Gerald Combs <gerald@wireshark.org> |
| 12 | * Copyright 1998 Gerald Combs |
| 13 | * |
| 14 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 15 | */ |
| 16 | |
| 17 | #include "config.h" |
| 18 | |
| 19 | #include <string.h> |
| 20 | |
| 21 | #include <epan/expert.h> |
| 22 | #include <epan/packet.h> |
| 23 | #include <epan/reassemble.h> |
| 24 | #include <epan/tfs.h> |
| 25 | #include <wsutil/array.h> |
| 26 | #include <wsutil/bitswap.h> |
| 27 | |
| 28 | #include "packet-smpte-291-vanc.h" |
| 29 | |
| 30 | /* Protocol, field, subtree, expert, and dissector declarations */ |
| 31 | |
| 32 | /* SMPTE ST 291 common declarations */ |
| 33 | static int proto_st291; |
| 34 | static int hf_st291_did; |
| 35 | static int hf_st291_sdid; |
| 36 | static int hf_st291_dbn; |
| 37 | static dissector_table_t st291_did_sdid_table; |
| 38 | |
| 39 | typedef struct { |
| 40 | tvbuff_t *full_tvb; |
| 41 | tvbuff_t *byte_tvb; |
| 42 | } st291_vanc_udw_t; |
| 43 | |
| 44 | /* SMPTE ST 12-2 declarations */ |
| 45 | static int proto_st12_2; |
| 46 | static int hf_st12_2_timecode; |
| 47 | static int hf_st12_2_frame_units; |
| 48 | static int hf_st12_2_frame_tens; |
| 49 | static int hf_st12_2_second_units; |
| 50 | static int hf_st12_2_second_tens; |
| 51 | static int hf_st12_2_minute_units; |
| 52 | static int hf_st12_2_minute_tens; |
| 53 | static int hf_st12_2_hour_units; |
| 54 | static int hf_st12_2_hour_tens; |
| 55 | static int hf_st12_2_binary_group_1; |
| 56 | static int hf_st12_2_binary_group_2; |
| 57 | static int hf_st12_2_binary_group_3; |
| 58 | static int hf_st12_2_binary_group_4; |
| 59 | static int hf_st12_2_binary_group_5; |
| 60 | static int hf_st12_2_binary_group_6; |
| 61 | static int hf_st12_2_binary_group_7; |
| 62 | static int hf_st12_2_binary_group_8; |
| 63 | static int hf_st12_2_flag_bit_10; |
| 64 | static int hf_st12_2_flag_bit_11; |
| 65 | static int hf_st12_2_flag_bit_27; |
| 66 | static int hf_st12_2_flag_bit_43; |
| 67 | static int hf_st12_2_flag_bit_58; |
| 68 | static int hf_st12_2_flag_bit_59; |
| 69 | static int hf_st12_2_payload_type; |
| 70 | static int hf_st12_2_vitc; |
| 71 | static int hf_st12_2_vitc_line_sel; |
| 72 | static int hf_st12_2_vitc_line_dup; |
| 73 | static int hf_st12_2_vitc_validity; |
| 74 | static int hf_st12_2_vitc_process; |
| 75 | static int ett_st12_2; |
| 76 | static int ett_st12_2_timecode; |
| 77 | static int ett_st12_2_vitc; |
| 78 | static expert_field ei_st12_2_bad_length = EI_INIT{0, 0}; |
| 79 | static dissector_handle_t st12_2_handle; |
| 80 | |
| 81 | /* SMPTE ST 2010 declarations */ |
| 82 | static int proto_st2010; |
| 83 | static int hf_st2010_payload_descriptor; |
| 84 | static int hf_st2010_reserved; |
| 85 | static int hf_st2010_version; |
| 86 | static int hf_st2010_continued_pkt; |
| 87 | static int hf_st2010_following_pkt; |
| 88 | static int hf_st2010_duplicate_msg; |
| 89 | static int hf_st2010_payload; |
| 90 | static int hf_st2010_fragments; |
| 91 | static int hf_st2010_fragment; |
| 92 | static int hf_st2010_fragment_overlap; |
| 93 | static int hf_st2010_fragment_overlap_conflict; |
| 94 | static int hf_st2010_fragment_multiple_tails; |
| 95 | static int hf_st2010_fragment_too_long_fragment; |
| 96 | static int hf_st2010_fragment_error; |
| 97 | static int hf_st2010_fragment_count; |
| 98 | static int hf_st2010_reassembled_in; |
| 99 | static int hf_st2010_reassembled_length; |
| 100 | static int hf_st2010_reassembled_data; |
| 101 | static int ett_st2010; |
| 102 | static int ett_st2010_fragment; |
| 103 | static int ett_st2010_fragments; |
| 104 | static expert_field ei_st2010_bad_version = EI_INIT{0, 0}; |
| 105 | static expert_field ei_st2010_reserved_bits = EI_INIT{0, 0}; |
| 106 | static expert_field ei_st2010_orphan_fragment = EI_INIT{0, 0}; |
| 107 | static expert_field ei_st2010_overlapping_message = EI_INIT{0, 0}; |
| 108 | static expert_field ei_st2010_empty_payload = EI_INIT{0, 0}; |
| 109 | static dissector_handle_t st2010_handle; |
| 110 | static dissector_table_t st2010_payload_table; |
| 111 | static reassembly_table st2010_reassembly_table; |
| 112 | |
| 113 | /* SMPTE ST 2016-3 declarations */ |
| 114 | static int proto_st2016_3; |
| 115 | static int hf_st2016_3_afd_byte; |
| 116 | static int hf_st2016_3_afd_code; |
| 117 | static int hf_st2016_3_afd_ar; |
| 118 | static int hf_st2016_3_afd_reserved; |
| 119 | static int hf_st2016_3_reserved_1; |
| 120 | static int hf_st2016_3_reserved_2; |
| 121 | static int hf_st2016_3_bar_flags; |
| 122 | static int hf_st2016_3_bar_top; |
| 123 | static int hf_st2016_3_bar_bottom; |
| 124 | static int hf_st2016_3_bar_left; |
| 125 | static int hf_st2016_3_bar_right; |
| 126 | static int hf_st2016_3_bar_reserved; |
| 127 | static int hf_st2016_3_bar_value_1; |
| 128 | static int hf_st2016_3_bar_value_1_marker; |
| 129 | static int hf_st2016_3_bar_value_1_data; |
| 130 | static int hf_st2016_3_bar_value_2; |
| 131 | static int hf_st2016_3_bar_value_2_marker; |
| 132 | static int hf_st2016_3_bar_value_2_data; |
| 133 | static int hf_st2016_3_bar_value_1_meaning; |
| 134 | static int hf_st2016_3_bar_value_2_meaning; |
| 135 | static int ett_st2016_3; |
| 136 | static int ett_st2016_3_afd; |
| 137 | static int ett_st2016_3_bar_flags; |
| 138 | static int ett_st2016_3_bar_value_1; |
| 139 | static int ett_st2016_3_bar_value_2; |
| 140 | static expert_field ei_st2016_3_bad_length; |
| 141 | static expert_field ei_st2016_3_afd_reserved; |
| 142 | static expert_field ei_st2016_3_reserved_udw; |
| 143 | static expert_field ei_st2016_3_bar_reserved; |
| 144 | static expert_field ei_st2016_3_bar_flags_invalid; |
| 145 | static expert_field ei_st2016_3_bar_marker; |
| 146 | static dissector_handle_t st2016_3_handle; |
| 147 | |
| 148 | /* SMPTE ST 334-2 declarations */ |
| 149 | static int proto_st334_2; |
| 150 | static int hf_st334_2_cdp_identifier; |
| 151 | static int hf_st334_2_cdp_length; |
| 152 | static int hf_st334_2_frame_rate; |
| 153 | static int hf_st334_2_header_reserved; |
| 154 | static int hf_st334_2_time_code_present; |
| 155 | static int hf_st334_2_ccdata_present; |
| 156 | static int hf_st334_2_svcinfo_present; |
| 157 | static int hf_st334_2_svc_info_start; |
| 158 | static int hf_st334_2_svc_info_change; |
| 159 | static int hf_st334_2_svc_info_complete; |
| 160 | static int hf_st334_2_caption_service_active; |
| 161 | static int hf_st334_2_header_reserved_bit; |
| 162 | static int hf_st334_2_header_sequence_counter; |
| 163 | static int hf_st334_2_section_id; |
| 164 | static int hf_st334_2_timecode; |
| 165 | static int hf_st334_2_tc_field_flag; |
| 166 | static int hf_st334_2_drop_frame_flag; |
| 167 | static int hf_st334_2_cc_count; |
| 168 | static int hf_st334_2_cc_marker_bits; |
| 169 | static int hf_st334_2_cc_valid; |
| 170 | static int hf_st334_2_cc_type; |
| 171 | static int hf_st334_2_cc_data_1; |
| 172 | static int hf_st334_2_cc_data_2; |
| 173 | static int hf_st334_2_dtvcc_data; |
| 174 | static int hf_st334_2_svc_reserved; |
| 175 | static int hf_st334_2_svc_info_start_section; |
| 176 | static int hf_st334_2_svc_info_change_section; |
| 177 | static int hf_st334_2_svc_info_complete_section; |
| 178 | static int hf_st334_2_svc_count; |
| 179 | static int hf_st334_2_csn_reserved; |
| 180 | static int hf_st334_2_csn_size; |
| 181 | static int hf_st334_2_csn_reserved_2; |
| 182 | static int hf_st334_2_caption_service_number; |
| 183 | static int hf_st334_2_service_data; |
| 184 | static int hf_st334_2_service_language; |
| 185 | static int hf_st334_2_service_digital_cc; |
| 186 | static int hf_st334_2_service_digital_reserved; |
| 187 | static int hf_st334_2_service_line21_reserved; |
| 188 | static int hf_st334_2_service_line21_field; |
| 189 | static int hf_st334_2_service_descriptor_number; |
| 190 | static int hf_st334_2_service_easy_reader; |
| 191 | static int hf_st334_2_service_wide_aspect_ratio; |
| 192 | static int hf_st334_2_service_reserved_14; |
| 193 | static int hf_st334_2_future_length; |
| 194 | static int hf_st334_2_future_data; |
| 195 | static int hf_st334_2_footer_sequence_counter; |
| 196 | static int hf_st334_2_packet_checksum; |
| 197 | static int hf_st334_2_checksum_calculated; |
| 198 | static int ett_st334_2; |
| 199 | static int ett_st334_2_header; |
| 200 | static int ett_st334_2_timecode; |
| 201 | static int ett_st334_2_ccdata; |
| 202 | static int ett_st334_2_cc_construct; |
| 203 | static int ett_st334_2_svcinfo; |
| 204 | static int ett_st334_2_service; |
| 205 | static int ett_st334_2_service_data; |
| 206 | static int ett_st334_2_future; |
| 207 | static int ett_st334_2_footer; |
| 208 | static expert_field ei_st334_2_bad_identifier; |
| 209 | static expert_field ei_st334_2_bad_length; |
| 210 | static expert_field ei_st334_2_bad_reserved; |
| 211 | static expert_field ei_st334_2_bad_section_order; |
| 212 | static expert_field ei_st334_2_duplicate_section; |
| 213 | static expert_field ei_st334_2_missing_section; |
| 214 | static expert_field ei_st334_2_cc_count; |
| 215 | static expert_field ei_st334_2_bad_marker; |
| 216 | static expert_field ei_st334_2_sequence_mismatch; |
| 217 | static expert_field ei_st334_2_bad_checksum; |
| 218 | static expert_field ei_st334_2_truncated; |
| 219 | static dissector_handle_t st334_2_handle; |
| 220 | |
| 221 | /* SMPTE ST 2031 declarations */ |
| 222 | static int proto_st2031; |
| 223 | static int hf_st2031_data_identifier; |
| 224 | static int hf_st2031_data_unit_id; |
| 225 | static int hf_st2031_data_unit_length; |
| 226 | static int hf_st2031_field_parity; |
| 227 | static int hf_st2031_line_offset; |
| 228 | static int hf_st2031_framing_code; |
| 229 | static int hf_st2031_magazine_hamming; |
| 230 | static int hf_st2031_magazine; |
| 231 | static int hf_st2031_packet_number_hamming; |
| 232 | static int hf_st2031_packet_number; |
| 233 | static int hf_st2031_page_units_hamming; |
| 234 | static int hf_st2031_page_units; |
| 235 | static int hf_st2031_page_tens_hamming; |
| 236 | static int hf_st2031_page_tens; |
| 237 | static int hf_st2031_data_string; |
| 238 | static int hf_st2031_textdata_array; |
| 239 | static int hf_st2031_erase_page; |
| 240 | static int hf_st2031_newsflash; |
| 241 | static int hf_st2031_subtitle; |
| 242 | static int hf_st2031_suppress_header; |
| 243 | static int hf_st2031_update_indicator; |
| 244 | static int hf_st2031_interrupted_sequence; |
| 245 | static int hf_st2031_inhibit_display; |
| 246 | static int hf_st2031_magazine_serial; |
| 247 | static int hf_st2031_character_set; |
| 248 | static int hf_st2031_tt_control; |
| 249 | static int ett_st2031; |
| 250 | static dissector_handle_t st2031_handle; |
| 251 | |
| 252 | /* OP-47 / SMPTE RDD 8 declarations */ |
| 253 | static int proto_op47; |
| 254 | static int hf_op47_sdp_identifier; |
| 255 | static int hf_op47_sdp_length; |
| 256 | static int hf_op47_sdp_format_code; |
| 257 | static int hf_op47_sdp_adaption_header; |
| 258 | static int hf_op47_sdp_pkt_desc_b; |
| 259 | static int hf_op47_clock_runin; |
| 260 | static int hf_op47_framing_code; |
| 261 | static int hf_op47_magazine_hamming; |
| 262 | static int hf_op47_magazine; |
| 263 | static int hf_op47_packet_number_hamming; |
| 264 | static int hf_op47_packet_number; |
| 265 | static int hf_op47_page_units_hamming; |
| 266 | static int hf_op47_page_units; |
| 267 | static int hf_op47_page_tens_hamming; |
| 268 | static int hf_op47_page_tens; |
| 269 | static int hf_op47_data_string; |
| 270 | static int hf_op47_textdata_array; |
| 271 | static int hf_op47_erase_page; |
| 272 | static int hf_op47_newsflash; |
| 273 | static int hf_op47_subtitle; |
| 274 | static int hf_op47_suppress_header; |
| 275 | static int hf_op47_update_indicator; |
| 276 | static int hf_op47_interrupted_sequence; |
| 277 | static int hf_op47_inhibit_display; |
| 278 | static int hf_op47_magazine_serial; |
| 279 | static int hf_op47_character_set; |
| 280 | static int hf_op47_tt_control; |
| 281 | static int ett_op47; |
| 282 | static int ett_op47_wst; |
| 283 | static dissector_handle_t op47_handle; |
| 284 | |
| 285 | /* ST 291 Type 2 DID/SDID keys used by the built-in VANC dissectors. */ |
| 286 | #define ST12_2_DID_SDID_KEY0x6060 0x6060 |
| 287 | #define ST2010_DID_SDID_KEY0x4107 0x4107 |
| 288 | #define ST2016_3_DID_SDID_KEY0x4105 0x4105 |
| 289 | #define ST334_2_DID_SDID_KEY0x6101 0x6101 |
| 290 | #define ST334_2_CDP_IDENTIFIER0x9669 0x9669 |
| 291 | #define ST2031_DID_SDID_KEY0x4108 0x4108 |
| 292 | #define OP47_DID_SDID_KEY0x4302 0x4302 |
| 293 | |
| 294 | #define ST2010_PAYLOAD_SCTE1040 0 |
| 295 | /* |
| 296 | * SMPTE ST 291-1 ancillary-data core and DID/SDID dispatch |
| 297 | */ |
| 298 | |
| 299 | |
| 300 | /* |
| 301 | * Registered SMPTE ST 291 DID/SDID assignments. |
| 302 | * |
| 303 | * SMPTE ST 291-1:2011, Sec. 4 assigns DID values through the SMPTE |
| 304 | * Registration Authority; Sec. 5.1 defines Type 1 versus Type 2 packets. |
| 305 | * |
| 306 | * Source: SMPTE Registration Authority, "Data Identification Word |
| 307 | * Assignments for Registered DIDs", downloaded from: |
| 308 | * https://www.smpte-ra.org/smpte-ancillary-data-smpte-st-291 |
| 309 | * |
| 310 | * The register contained 81 assignments when reviewed on 2026-09-05. |
| 311 | * Keep this table synchronized with the SMPTE RA register rather than with |
| 312 | * transport-specific dissectors such as ST 2110-40 or ST 2038. |
| 313 | */ |
| 314 | typedef struct { |
| 315 | uint8_t did; |
| 316 | uint8_t sdid; |
| 317 | const char *description; |
| 318 | } st291_did_sdid_entry_t; |
| 319 | |
| 320 | typedef struct { |
| 321 | uint8_t did; |
| 322 | const char *description; |
| 323 | } st291_did_entry_t; |
| 324 | |
| 325 | /* Type 2 identities: SMPTE ST 291-1:2011, Sec. 5.1 uses DID + SDID. */ |
| 326 | static const st291_did_sdid_entry_t st291_did_sdid_assignments[] = { |
| 327 | { 0x08, 0x08, "SMPTE ST 353: MPEG recoding data, VANC space" }, |
| 328 | { 0x08, 0x0c, "SMPTE ST 353: MPEG recoding data, HANC space" }, |
| 329 | { 0x40, 0x01, "SMPTE ST 305: SDTI transport in active frame space" }, |
| 330 | { 0x40, 0x02, "SMPTE ST 348: HD-SDTI transport in active frame space" }, |
| 331 | { 0x40, 0x04, "SMPTE ST 427: Link Encryption Message 1" }, |
| 332 | { 0x40, 0x05, "SMPTE ST 427: Link Encryption Message 2" }, |
| 333 | { 0x40, 0x06, "SMPTE ST 427: Link Encryption Metadata" }, |
| 334 | { 0x41, 0x01, "SMPTE ST 352: Payload Identification, HANC space" }, |
| 335 | { 0x41, 0x05, "SMPTE ST 2016-3: AFD and Bar Data" }, |
| 336 | { 0x41, 0x06, "SMPTE ST 2016-4: Pan-Scan Data" }, |
| 337 | { 0x41, 0x07, "SMPTE ST 2010: ANSI/SCTE 104 messages" }, |
| 338 | { 0x41, 0x08, "SMPTE ST 2031: DVB/SCTE VBI data" }, |
| 339 | { 0x41, 0x09, "SMPTE ST 2056: MPEG TS packets in VANC" }, |
| 340 | { 0x41, 0x0a, "SMPTE ST 2068: Stereoscopic 3D Frame Compatible Packing and Signaling" }, |
| 341 | { 0x41, 0x0b, "SMPTE ST 2064-2: Lip Sync data as specified by ST 2064-1" }, |
| 342 | { 0x41, 0x0c, "SMPTE ST 2108-1: Extended HDR/WCG for SDI" }, |
| 343 | { 0x41, 0x0d, "SMPTE ST 2108-2: Vertical Ancillary Data Mapping of KLV Formatted HDR/WCG Metadata" }, |
| 344 | { 0x43, 0x01, "ITU-R BT.1685: Structure of inter-station control data conveyed by ancillary data packets" }, |
| 345 | { 0x43, 0x02, "SMPTE RDD 8: Subtitling Distribution packet (SDP)" }, |
| 346 | { 0x43, 0x03, "SMPTE RDD 8: Transport of ANC packet in an ANC Multipacket" }, |
| 347 | { 0x43, 0x04, "ARIB TR-B29: Metadata to monitor errors of audio and video signals on a broadcasting chain" }, |
| 348 | { 0x43, 0x05, "SMPTE RDD 18: Acquisition Metadata Sets for Video Camera Parameters" }, |
| 349 | { 0x44, 0x04, "SMPTE RP 214: KLV Metadata transport in VANC space" }, |
| 350 | { 0x44, 0x14, "SMPTE RP 214: KLV Metadata transport in HANC space" }, |
| 351 | { 0x44, 0x44, "SMPTE RP 223: Packing UMID and Program Identification Label Data into ST 291 ancillary data packets" }, |
| 352 | { 0x45, 0x01, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 353 | { 0x45, 0x02, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 354 | { 0x45, 0x03, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 355 | { 0x45, 0x04, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 356 | { 0x45, 0x05, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 357 | { 0x45, 0x06, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 358 | { 0x45, 0x07, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 359 | { 0x45, 0x08, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 360 | { 0x45, 0x09, "SMPTE ST 2020-1: Compressed Audio Metadata" }, |
| 361 | { 0x46, 0x01, "SMPTE ST 2051: Two Frame Marker in HANC" }, |
| 362 | { 0x50, 0x01, "SMPTE RDD 8: WSS data" }, |
| 363 | { 0x51, 0x01, "SMPTE RP 215: Film Codes in VANC space" }, |
| 364 | { 0x60, 0x60, "SMPTE ST 12-2: Ancillary Time Code" }, |
| 365 | { 0x60, 0x61, "SMPTE ST 12-3: Time Code for High Frame Rate Signals" }, |
| 366 | { 0x60, 0x62, "SMPTE ST 2103: Generic Time Label" }, |
| 367 | { 0x61, 0x01, "SMPTE ST 334-1: EIA 708B Data mapping into VANC space" }, |
| 368 | { 0x61, 0x02, "SMPTE ST 334-1: EIA 608 Data mapping into VANC space" }, |
| 369 | { 0x62, 0x01, "SMPTE RP 207: Program Description in VANC space" }, |
| 370 | { 0x62, 0x02, "SMPTE ST 334-1: Data broadcast (DTV) in VANC space" }, |
| 371 | { 0x62, 0x03, "SMPTE RP 208: VBI Data in VANC space" }, |
| 372 | { 0x64, 0x64, "SMPTE RP 196 (withdrawn): Time Code in HANC space" }, |
| 373 | { 0x64, 0x7f, "SMPTE RP 196 (withdrawn): VITC in HANC space" }, |
| 374 | }; |
| 375 | |
| 376 | /* Type 1 identities: SMPTE ST 291-1:2011, Sec. 5.1 uses DID + DBN. */ |
| 377 | static const st291_did_entry_t st291_did_assignments[] = { |
| 378 | { 0x00, "SMPTE ST 291: Undefined data deleted (deprecated)" }, |
| 379 | { 0x80, "SMPTE ST 291: Packet marked for deletion" }, |
| 380 | { 0x84, "SMPTE ST 291: End packet deleted (deprecated)" }, |
| 381 | { 0x88, "SMPTE ST 291: Start packet deleted (deprecated)" }, |
| 382 | { 0xa0, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 8 Control packet" }, |
| 383 | { 0xa1, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 7 Control packet" }, |
| 384 | { 0xa2, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 6 Control packet" }, |
| 385 | { 0xa3, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 5 Control packet" }, |
| 386 | { 0xa4, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 8" }, |
| 387 | { 0xa5, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 7" }, |
| 388 | { 0xa6, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 6" }, |
| 389 | { 0xa7, "SMPTE ST 299-2: Audio data in HANC space (3G), Group 5" }, |
| 390 | { 0xe0, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 391 | { 0xe1, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 392 | { 0xe2, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 393 | { 0xe3, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 394 | { 0xe4, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 395 | { 0xe5, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 396 | { 0xe6, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 397 | { 0xe7, "SMPTE ST 299-1: Audio data in HANC space (HDTV)" }, |
| 398 | { 0xec, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 399 | { 0xed, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 400 | { 0xee, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 401 | { 0xef, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 402 | { 0xf0, "SMPTE ST 315: Camera position (HANC or VANC space)" }, |
| 403 | { 0xf4, "SMPTE RP 165: Error Detection and Handling (HANC space)" }, |
| 404 | { 0xf8, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 405 | { 0xf9, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 406 | { 0xfa, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 407 | { 0xfb, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 408 | { 0xfc, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 409 | { 0xfd, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 410 | { 0xfe, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 411 | { 0xff, "SMPTE ST 272: Audio data in HANC space (SDTV)" }, |
| 412 | }; |
| 413 | |
| 414 | static const char * |
| 415 | st291_lookup_did(uint8_t did) |
| 416 | { |
| 417 | unsigned i; |
| 418 | |
| 419 | for (i = 0; i < array_length(st291_did_assignments)(sizeof (st291_did_assignments) / sizeof (st291_did_assignments )[0]); i++) { |
| 420 | if (st291_did_assignments[i].did == did) |
| 421 | return st291_did_assignments[i].description; |
| 422 | } |
| 423 | return NULL((void*)0); |
| 424 | } |
| 425 | |
| 426 | static const char * |
| 427 | st291_lookup_did_sdid(uint8_t did, uint8_t sdid) |
| 428 | { |
| 429 | unsigned i; |
| 430 | |
| 431 | for (i = 0; i < array_length(st291_did_sdid_assignments)(sizeof (st291_did_sdid_assignments) / sizeof (st291_did_sdid_assignments )[0]); i++) { |
| 432 | if (st291_did_sdid_assignments[i].did == did && |
| 433 | st291_did_sdid_assignments[i].sdid == sdid) |
| 434 | return st291_did_sdid_assignments[i].description; |
| 435 | } |
| 436 | return NULL((void*)0); |
| 437 | } |
| 438 | |
| 439 | static bool_Bool |
| 440 | st291_id_word_parity_ok(uint16_t word) |
| 441 | { |
| 442 | unsigned ones = 0; |
| 443 | unsigned bit; |
| 444 | uint8_t data = word & 0x00ff; |
| 445 | unsigned b8 = (word >> 8) & 1U; |
| 446 | unsigned b9 = (word >> 9) & 1U; |
| 447 | |
| 448 | for (bit = 0; bit < 8; bit++) |
| 449 | ones += (data >> bit) & 1U; |
| 450 | |
| 451 | return (((ones + b8) & 1U) == 0) && (b9 == (b8 ^ 1U)); |
| 452 | } |
| 453 | |
| 454 | bool_Bool |
| 455 | st291_vanc_packet_from_words(tvbuff_t *parent_tvb, packet_info *pinfo, |
| 456 | const uint16_t *words, unsigned word_count, |
| 457 | st291_vanc_packet_t *packet) |
| 458 | { |
| 459 | uint16_t *normalized_words; |
| 460 | uint8_t *packed_data; |
| 461 | unsigned expected_words; |
| 462 | unsigned packed_length; |
| 463 | unsigned i; |
| 464 | |
| 465 | DISSECTOR_ASSERT(parent_tvb != NULL)((void) ((parent_tvb != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 465, "parent_tvb != ((void*)0)")))); |
| 466 | DISSECTOR_ASSERT(pinfo != NULL)((void) ((pinfo != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 466, "pinfo != ((void*)0)")))); |
| 467 | DISSECTOR_ASSERT(words != NULL || word_count == 0)((void) ((words != ((void*)0) || word_count == 0) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/dissectors/packet-smpte-291-vanc.c", 467, "words != ((void*)0) || word_count == 0" )))); |
| 468 | DISSECTOR_ASSERT(packet != NULL)((void) ((packet != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 468, "packet != ((void*)0)")))); |
| 469 | |
| 470 | memset(packet, 0, sizeof(*packet)); |
| 471 | if (word_count < 4) |
| 472 | return false0; |
| 473 | |
| 474 | expected_words = 4U + (words[2] & 0x00ff); |
| 475 | if (word_count < expected_words) |
| 476 | return false0; |
| 477 | |
| 478 | normalized_words = wmem_alloc_array(pinfo->pool, uint16_t, expected_words)((uint16_t*)wmem_alloc((pinfo->pool), (((((expected_words) ) <= 0) || ((size_t)sizeof(uint16_t) > (9223372036854775807L / (size_t)((expected_words))))) ? 0 : (sizeof(uint16_t) * (( expected_words)))))); |
| 479 | for (i = 0; i < expected_words; i++) |
| 480 | normalized_words[i] = words[i] & 0x03ff; |
| 481 | |
| 482 | packet->parent_tvb = parent_tvb; |
| 483 | packet->words = normalized_words; |
| 484 | packet->word_count = expected_words; |
| 485 | packet->did = normalized_words[0] & 0x00ff; |
| 486 | packet->sdid_or_dbn = normalized_words[1] & 0x00ff; |
| 487 | packet->data_count = normalized_words[2] & 0x00ff; |
| 488 | packet->checksum = normalized_words[3 + packet->data_count]; |
| 489 | packet->did_parity_ok = st291_id_word_parity_ok(normalized_words[0]); |
| 490 | packet->second_word_parity_ok = st291_id_word_parity_ok(normalized_words[1]); |
| 491 | packet->data_count_parity_ok = st291_id_word_parity_ok(normalized_words[2]); |
| 492 | |
| 493 | packet->checksum_calculated = 0; |
| 494 | for (i = 0; i < 3U + packet->data_count; i++) { |
| 495 | packet->checksum_calculated = |
| 496 | (packet->checksum_calculated + (normalized_words[i] & 0x01ff)) & |
| 497 | 0x01ff; |
| 498 | } |
| 499 | if ((packet->checksum_calculated & 0x0100) == 0) |
| 500 | packet->checksum_calculated |= 0x0200; |
| 501 | packet->checksum_ok = packet->checksum == packet->checksum_calculated; |
| 502 | |
| 503 | /* Word-oriented transports do not necessarily have a contiguous source |
| 504 | * range (for example, one component of an interleaved SDI raster). Build |
| 505 | * a canonical packed representation so the shared renderer can still |
| 506 | * display the logical 10-bit UDW sequence. */ |
| 507 | if (packet->data_count != 0) { |
| 508 | packed_length = (packet->data_count * 10 + 7) / 8; |
| 509 | packed_data = wmem_alloc0(pinfo->pool, packed_length); |
| 510 | for (i = 0; i < packet->data_count; i++) { |
| 511 | uint16_t word = normalized_words[3 + i]; |
| 512 | unsigned bit; |
| 513 | |
| 514 | for (bit = 0; bit < 10; bit++) { |
| 515 | if ((word & (1U << (9 - bit))) != 0) { |
| 516 | unsigned packed_bit = i * 10 + bit; |
| 517 | packed_data[packed_bit / 8] |= 1U << (7 - packed_bit % 8); |
| 518 | } |
| 519 | } |
| 520 | } |
| 521 | packet->packed_udw_tvb = tvb_new_child_real_data(parent_tvb, |
| 522 | packed_data, |
| 523 | packed_length, |
| 524 | packed_length); |
| 525 | } |
| 526 | return true1; |
| 527 | } |
| 528 | |
| 529 | bool_Bool |
| 530 | st291_vanc_packet_from_packed(tvbuff_t *tvb, packet_info *pinfo, |
| 531 | unsigned bit_offset, unsigned available_bits, |
| 532 | st291_vanc_packet_t *packet) |
| 533 | { |
| 534 | uint16_t header_words[3]; |
| 535 | uint16_t *words; |
| 536 | unsigned required_bits; |
| 537 | unsigned udw_bit_offset; |
| 538 | unsigned word_count; |
| 539 | unsigned byte_offset; |
| 540 | unsigned byte_length; |
| 541 | unsigned i; |
| 542 | |
| 543 | DISSECTOR_ASSERT(tvb != NULL)((void) ((tvb != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 543, "tvb != ((void*)0)")))); |
| 544 | DISSECTOR_ASSERT(pinfo != NULL)((void) ((pinfo != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 544, "pinfo != ((void*)0)")))); |
| 545 | DISSECTOR_ASSERT(packet != NULL)((void) ((packet != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 545, "packet != ((void*)0)")))); |
| 546 | |
| 547 | memset(packet, 0, sizeof(*packet)); |
| 548 | if (available_bits < 30) |
| 549 | return false0; |
| 550 | |
| 551 | for (i = 0; i < array_length(header_words)(sizeof (header_words) / sizeof (header_words)[0]); i++) |
| 552 | header_words[i] = tvb_get_bits16(tvb, bit_offset + i * 10, 10, |
| 553 | ENC_BIG_ENDIAN0x00000000); |
| 554 | |
| 555 | word_count = 4U + (header_words[2] & 0x00ff); |
| 556 | required_bits = word_count * 10; |
| 557 | if (required_bits > available_bits) { |
| 558 | /* Preserve the decoded header so the transport can distinguish a |
| 559 | * truncated ST 291 header from a complete header whose declared |
| 560 | * packet extends beyond the transport boundary. */ |
| 561 | packet->did = header_words[0] & 0x00ff; |
| 562 | packet->sdid_or_dbn = header_words[1] & 0x00ff; |
| 563 | packet->data_count = header_words[2] & 0x00ff; |
| 564 | packet->word_count = word_count; |
| 565 | return false0; |
| 566 | } |
| 567 | |
| 568 | words = wmem_alloc_array(pinfo->pool, uint16_t, word_count)((uint16_t*)wmem_alloc((pinfo->pool), (((((word_count)) <= 0) || ((size_t)sizeof(uint16_t) > (9223372036854775807L / (size_t)((word_count))))) ? 0 : (sizeof(uint16_t) * ((word_count )))))); |
| 569 | for (i = 0; i < word_count; i++) |
| 570 | words[i] = tvb_get_bits16(tvb, bit_offset + i * 10, 10, |
| 571 | ENC_BIG_ENDIAN0x00000000); |
| 572 | |
| 573 | if (!st291_vanc_packet_from_words(tvb, pinfo, words, word_count, packet)) |
| 574 | return false0; |
| 575 | |
| 576 | if (packet->data_count != 0) { |
| 577 | udw_bit_offset = bit_offset + 30; |
| 578 | byte_offset = (unsigned)(udw_bit_offset / 8); |
| 579 | packet->packed_udw_bit_offset = (unsigned)(udw_bit_offset % 8); |
| 580 | byte_length = (packet->packed_udw_bit_offset + |
| 581 | packet->data_count * 10 + 7) / 8; |
| 582 | packet->packed_udw_tvb = tvb_new_subset_length(tvb, byte_offset, |
| 583 | byte_length); |
| 584 | } |
| 585 | |
| 586 | return true1; |
| 587 | } |
| 588 | |
| 589 | /* Keep the canonical full-width and compatibility byte TVBs here so every |
| 590 | * ST 291 transport presents the same subdissector interface. */ |
| 591 | static void |
| 592 | st291_vanc_create_udw_tvbs(tvbuff_t *parent_tvb, packet_info *pinfo, |
| 593 | const uint16_t *udw_words, unsigned udw_count, |
| 594 | st291_vanc_udw_t *udw) |
| 595 | { |
| 596 | uint8_t *full_data; |
| 597 | uint8_t *payload_data; |
| 598 | unsigned i; |
| 599 | |
| 600 | DISSECTOR_ASSERT(udw != NULL)((void) ((udw != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 600, "udw != ((void*)0)")))); |
| 601 | DISSECTOR_ASSERT(udw_words != NULL || udw_count == 0)((void) ((udw_words != ((void*)0) || udw_count == 0) ? (void) 0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/dissectors/packet-smpte-291-vanc.c", 601, "udw_words != ((void*)0) || udw_count == 0" )))); |
| 602 | |
| 603 | full_data = wmem_alloc(pinfo->pool, MAX(2U, udw_count * 2U)(((2U) > (udw_count * 2U)) ? (2U) : (udw_count * 2U))); |
| 604 | payload_data = wmem_alloc(pinfo->pool, MAX(1U, udw_count)(((1U) > (udw_count)) ? (1U) : (udw_count))); |
| 605 | |
| 606 | for (i = 0; i < udw_count; i++) { |
| 607 | uint16_t word = udw_words[i] & 0x03ff; |
| 608 | |
| 609 | full_data[i * 2] = (uint8_t)(word >> 8); |
| 610 | full_data[i * 2 + 1] = (uint8_t)word; |
| 611 | payload_data[i] = (uint8_t)word; |
| 612 | } |
| 613 | |
| 614 | udw->full_tvb = tvb_new_child_real_data(parent_tvb, full_data, |
| 615 | udw_count * 2, udw_count * 2); |
| 616 | udw->byte_tvb = tvb_new_child_real_data(parent_tvb, payload_data, |
| 617 | udw_count, udw_count); |
| 618 | } |
| 619 | |
| 620 | bool_Bool |
| 621 | st291_vanc_dissect_packet(const st291_vanc_packet_t *packet, |
| 622 | packet_info *pinfo, proto_tree *tree, |
| 623 | proto_item *payload_item _U___attribute__((unused)), |
| 624 | const st291_vanc_dissector_data_t *data) |
| 625 | { |
| 626 | st291_vanc_udw_t udw; |
| 627 | st291_vanc_dissector_data_t subdissector_data; |
| 628 | uint8_t dispatch_sdid; |
| 629 | |
| 630 | DISSECTOR_ASSERT(packet != NULL)((void) ((packet != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 630, "packet != ((void*)0)")))); |
| 631 | DISSECTOR_ASSERT(data != NULL)((void) ((data != ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-smpte-291-vanc.c" , 631, "data != ((void*)0)")))); |
| 632 | |
| 633 | st291_vanc_create_udw_tvbs(packet->parent_tvb, pinfo, packet->words + 3, |
| 634 | packet->data_count, &udw); |
| 635 | if (packet->data_count != 0) |
| 636 | add_new_data_source(pinfo, udw.byte_tvb, "ST 291 UDW Array"); |
| 637 | |
| 638 | subdissector_data = *data; |
| 639 | subdissector_data.full_udw_tvb = udw.full_tvb; |
| 640 | dispatch_sdid = (packet->did & 0x80U) != 0 ? 0x00 : packet->sdid_or_dbn; |
| 641 | return dissector_try_uint_with_data( |
| 642 | st291_did_sdid_table, |
| 643 | ((uint32_t)packet->did << 8) | dispatch_sdid, |
| 644 | udw.byte_tvb, pinfo, tree, true1, &subdissector_data); |
| 645 | } |
| 646 | |
| 647 | /* SMPTE ST 291-1:2011, Secs. 5.1-5.2 -- DID/SDID/DBN on-wire identity fields. */ |
| 648 | proto_item * |
| 649 | st291_tree_add_did(proto_tree *tree, tvbuff_t *tvb, |
| 650 | int offset, int length, uint8_t did) |
| 651 | { |
| 652 | return proto_tree_add_uint(tree, hf_st291_did, tvb, offset, length, did); |
| 653 | } |
| 654 | |
| 655 | proto_item * |
| 656 | st291_tree_add_sdid(proto_tree *tree, tvbuff_t *tvb, |
| 657 | int offset, int length, uint8_t did _U___attribute__((unused)), uint8_t sdid) |
| 658 | { |
| 659 | return proto_tree_add_uint(tree, hf_st291_sdid, tvb, offset, length, sdid); |
| 660 | } |
| 661 | |
| 662 | /* SMPTE ST 291-1:2011, Sec. 5.1: bit b7 of the DID distinguishes the |
| 663 | * Type 1 (DBN) and Type 2 (SDID) identity forms used for the lookup. */ |
| 664 | void |
| 665 | st291_append_packet_description(proto_item *item, uint8_t did, uint8_t sdid_or_dbn) |
| 666 | { |
| 667 | const char *description; |
| 668 | |
| 669 | if ((did & 0x80U) != 0) |
| 670 | description = st291_lookup_did(did); |
| 671 | else |
| 672 | description = st291_lookup_did_sdid(did, sdid_or_dbn); |
| 673 | |
| 674 | if (description != NULL((void*)0)) |
| 675 | proto_item_append_text(item, ": %s", description); |
| 676 | } |
| 677 | |
| 678 | proto_item * |
| 679 | st291_tree_add_dbn(proto_tree *tree, tvbuff_t *tvb, |
| 680 | int offset, int length, uint8_t dbn) |
| 681 | { |
| 682 | return proto_tree_add_uint(tree, hf_st291_dbn, tvb, offset, length, dbn); |
| 683 | } |
| 684 | |
| 685 | /* SMPTE ST 291-1:2011, Secs. 5.1-5.2 define DID, SDID and DBN. |
| 686 | * The st291.did_sdid table below is Wireshark-only dispatch metadata. */ |
| 687 | void |
| 688 | proto_register_st291(void) |
| 689 | { |
| 690 | static hf_register_info hf[] = { |
| 691 | { &hf_st291_did, |
| 692 | { "Data ID", "st291.did", FT_UINT8, BASE_HEX, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 693 | { &hf_st291_sdid, |
| 694 | { "Secondary Data ID", "st291.sdid", FT_UINT8, BASE_HEX, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 695 | { &hf_st291_dbn, |
| 696 | { "Data Block Number", "st291.dbn", FT_UINT8, BASE_HEX, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 697 | }; |
| 698 | |
| 699 | proto_st291 = proto_register_protocol( |
| 700 | "SMPTE ST 291 Ancillary Data", "ST 291", "st291"); |
| 701 | |
| 702 | proto_register_field_array(proto_st291, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0])); |
| 703 | |
| 704 | /* |
| 705 | * Public extension point for ST 291 application payload dissectors. |
| 706 | * Native and Lua dissectors can register DID/SDID keys here for |
| 707 | * additional VANC payload formats. |
| 708 | */ |
| 709 | st291_did_sdid_table = register_dissector_table( |
| 710 | "st291.did_sdid", "SMPTE ST 291 DID/SDID", |
| 711 | proto_st291, FT_UINT16, BASE_HEX); |
| 712 | } |
| 713 | |
| 714 | /* |
| 715 | * SMPTE ST 12-2 time code in ancillary data |
| 716 | */ |
| 717 | |
| 718 | |
| 719 | /* SMPTE ST 12-2:2014, Sec. 6.2.1, Table 2 -- DBB1 payload type. */ |
| 720 | static const value_string st12_2_payload_type_vals[] = { |
| 721 | { 0x00, "Linear time code (ATC_LTC)" }, |
| 722 | { 0x01, "Vertical interval time code #1 (ATC_VITC1)" }, |
| 723 | { 0x02, "Vertical interval time code #2 (ATC_VITC2)" }, |
| 724 | { 0x03, "User defined" }, |
| 725 | { 0x04, "User defined" }, |
| 726 | { 0x05, "User defined" }, |
| 727 | { 0x06, "Film data block (transferred from reader)" }, |
| 728 | { 0x07, "Production data block (transferred from reader)" }, |
| 729 | { 0x7D, "Video tape data block (locally generated)" }, |
| 730 | { 0x7E, "Film data block (locally generated)" }, |
| 731 | { 0x7F, "Production data block (locally generated)" }, |
| 732 | { 0, NULL((void*)0) } |
| 733 | }; |
| 734 | |
| 735 | /* SMPTE ST 12-2:2014, Sec. 6.2.2, Tables 3 and 5 -- DBB2 validity/process bits. */ |
| 736 | static const value_string st12_2_vitc_validity_vals[] = { |
| 737 | { 0, "No time code error received or locally generated time code address" }, |
| 738 | { 1, "Transmitted time code interpolated from previous time code (received a time code error)" }, |
| 739 | { 0, NULL((void*)0) } |
| 740 | }; |
| 741 | |
| 742 | static const value_string st12_2_vitc_process_vals[] = { |
| 743 | { 0, "Binary groups in time code data stream are processed to compensate for latency" }, |
| 744 | { 1, "Binary groups in time code data stream are only retransmitted (no delay compensation)" }, |
| 745 | { 0, NULL((void*)0) } |
| 746 | }; |
| 747 | |
| 748 | |
| 749 | /* |
| 750 | * SMPTE ST 12-2:2014, Sec. 6.3, Table 6 maps the 64 information bits |
| 751 | * defined by SMPTE ST 12-1 into UDW 1 through UDW 16. The time address |
| 752 | * is BCD; the intervening nibbles are the eight binary groups. The six |
| 753 | * remaining positions are ST 12-1 flag bits whose meaning depends on the |
| 754 | * television system/frame rate (ST 12-1:2014, Sec. 8.3 and Tables 1-3). |
| 755 | */ |
| 756 | static int |
| 757 | dissect_st12_2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) |
| 758 | { |
| 759 | const st291_vanc_dissector_data_t *st291_data = |
| 760 | (const st291_vanc_dissector_data_t *)data; |
| 761 | proto_tree *top_tree = |
| 762 | st291_data && st291_data->top_tree ? st291_data->top_tree : tree; |
| 763 | proto_item *ti; |
| 764 | proto_tree *st12_tree; |
| 765 | proto_tree *time_tree; |
| 766 | proto_tree *vitc_tree; |
| 767 | uint8_t dbb1 = 0; |
| 768 | uint8_t dbb2 = 0; |
| 769 | uint8_t frame_units; |
| 770 | uint8_t frame_tens; |
| 771 | uint8_t second_units; |
| 772 | uint8_t second_tens; |
| 773 | uint8_t minute_units; |
| 774 | uint8_t minute_tens; |
| 775 | uint8_t hour_units; |
| 776 | uint8_t hour_tens; |
| 777 | uint8_t frames; |
| 778 | uint8_t seconds; |
| 779 | uint8_t minutes; |
| 780 | uint8_t hours; |
| 781 | bool_Bool drop_frame; |
| 782 | char time_str[16]; |
| 783 | unsigned x; |
| 784 | |
| 785 | ti = proto_tree_add_item(top_tree, proto_st12_2, tvb, 0, |
| 786 | tvb_captured_length(tvb), ENC_NA0x00000000); |
| 787 | st12_tree = proto_item_add_subtree(ti, ett_st12_2); |
| 788 | |
| 789 | if (tvb_captured_length(tvb) < 16) { |
| 790 | expert_add_info_format(pinfo, ti, &ei_st12_2_bad_length, |
| 791 | "ST 12-2 requires at least 16 UDW bytes; packet contains %u", |
| 792 | tvb_captured_length(tvb)); |
| 793 | return tvb_captured_length(tvb); |
| 794 | } |
| 795 | |
| 796 | /* |
| 797 | * SMPTE ST 12-2:2014, Sec. 6.3, Table 6 maps the 64 information |
| 798 | * bits defined by SMPTE ST 12-1 into UDW 1 through UDW 16. |
| 799 | * |
| 800 | * The time-address digits are BCD: |
| 801 | * UDW 1/3 -- frame units/tens |
| 802 | * UDW 5/7 -- second units/tens |
| 803 | * UDW 9/11 -- minute units/tens |
| 804 | * UDW 13/15 -- hour units/tens |
| 805 | * |
| 806 | * ST 12-2 Sec. 6.1.2 defines b4 as the least-significant bit of |
| 807 | * each four-bit information group. |
| 808 | */ |
| 809 | frame_units = (tvb_get_uint8(tvb, 0) >> 4) & 0x0f; |
| 810 | frame_tens = (tvb_get_uint8(tvb, 2) >> 4) & 0x03; |
| 811 | second_units = (tvb_get_uint8(tvb, 4) >> 4) & 0x0f; |
| 812 | second_tens = (tvb_get_uint8(tvb, 6) >> 4) & 0x07; |
| 813 | minute_units = (tvb_get_uint8(tvb, 8) >> 4) & 0x0f; |
| 814 | minute_tens = (tvb_get_uint8(tvb, 10) >> 4) & 0x07; |
| 815 | hour_units = (tvb_get_uint8(tvb, 12) >> 4) & 0x0f; |
| 816 | hour_tens = (tvb_get_uint8(tvb, 14) >> 4) & 0x03; |
| 817 | |
| 818 | frames = frame_tens * 10 + frame_units; |
| 819 | seconds = second_tens * 10 + second_units; |
| 820 | minutes = minute_tens * 10 + minute_units; |
| 821 | hours = hour_tens * 10 + hour_units; |
| 822 | |
| 823 | /* |
| 824 | * SMPTE ST 12-2:2014, Sec. 6.3, Table 6 maps ST 12-1 bit 10 to |
| 825 | * UDW 3 b6. SMPTE ST 12-1:2014, Table 3 identifies bit 10 as |
| 826 | * the drop-frame flag for the applicable 30-frame systems. |
| 827 | */ |
| 828 | drop_frame = (tvb_get_uint8(tvb, 2) & 0x40) != 0; |
| 829 | |
| 830 | snprintf(time_str, sizeof(time_str), "%02u:%02u:%02u%c%02u", |
| 831 | hours, minutes, seconds, drop_frame ? ';' : ':', frames); |
| 832 | |
| 833 | /* |
| 834 | * This row is a human-readable representation of the 64 information |
| 835 | * bits below. It spans the actual UDW bytes rather than being marked |
| 836 | * generated, so selecting it highlights the complete ATC data block. |
| 837 | */ |
| 838 | ti = proto_tree_add_string(st12_tree, hf_st12_2_timecode, tvb, 0, 16, time_str); |
| 839 | time_tree = proto_item_add_subtree(ti, ett_st12_2_timecode); |
| 840 | |
| 841 | /* |
| 842 | * The BCD digit fields below are the actual on-wire nibbles from |
| 843 | * ST 12-2:2014, Sec. 6.3, Table 6. Their hf masks select the |
| 844 | * corresponding b4-b7 positions in each UDW byte. |
| 845 | */ |
| 846 | /* |
| 847 | * SMPTE ST 12-2:2014, Sec. 6.3, Table 6. Present the fields in |
| 848 | * UDW order so the protocol tree follows the packet layout directly. |
| 849 | */ |
| 850 | /* UDW 1: units of frames */ |
| 851 | proto_tree_add_item(time_tree, hf_st12_2_frame_units, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 852 | |
| 853 | /* UDW 2: binary group 1 */ |
| 854 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_1, tvb, 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 855 | |
| 856 | /* UDW 3: tens of frames, ST 12-1 flag bits 10 and 11 */ |
| 857 | proto_tree_add_item(time_tree, hf_st12_2_frame_tens, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 858 | proto_tree_add_item(time_tree, hf_st12_2_flag_bit_10, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 859 | proto_tree_add_item(time_tree, hf_st12_2_flag_bit_11, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 860 | |
| 861 | /* UDW 4: binary group 2 */ |
| 862 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_2, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 863 | |
| 864 | /* UDW 5: units of seconds */ |
| 865 | proto_tree_add_item(time_tree, hf_st12_2_second_units, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 866 | |
| 867 | /* UDW 6: binary group 3 */ |
| 868 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_3, tvb, 5, 1, ENC_BIG_ENDIAN0x00000000); |
| 869 | |
| 870 | /* UDW 7: tens of seconds, ST 12-1 flag bit 27 */ |
| 871 | proto_tree_add_item(time_tree, hf_st12_2_second_tens, tvb, 6, 1, ENC_BIG_ENDIAN0x00000000); |
| 872 | proto_tree_add_item(time_tree, hf_st12_2_flag_bit_27, tvb, 6, 1, ENC_BIG_ENDIAN0x00000000); |
| 873 | |
| 874 | /* UDW 8: binary group 4 */ |
| 875 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_4, tvb, 7, 1, ENC_BIG_ENDIAN0x00000000); |
| 876 | |
| 877 | /* UDW 9: units of minutes */ |
| 878 | proto_tree_add_item(time_tree, hf_st12_2_minute_units, tvb, 8, 1, ENC_BIG_ENDIAN0x00000000); |
| 879 | |
| 880 | /* UDW 10: binary group 5 */ |
| 881 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_5, tvb, 9, 1, ENC_BIG_ENDIAN0x00000000); |
| 882 | |
| 883 | /* UDW 11: tens of minutes, ST 12-1 flag bit 43 */ |
| 884 | proto_tree_add_item(time_tree, hf_st12_2_minute_tens, tvb, 10, 1, ENC_BIG_ENDIAN0x00000000); |
| 885 | proto_tree_add_item(time_tree, hf_st12_2_flag_bit_43, tvb, 10, 1, ENC_BIG_ENDIAN0x00000000); |
| 886 | |
| 887 | /* UDW 12: binary group 6 */ |
| 888 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_6, tvb, 11, 1, ENC_BIG_ENDIAN0x00000000); |
| 889 | |
| 890 | /* UDW 13: units of hours */ |
| 891 | proto_tree_add_item(time_tree, hf_st12_2_hour_units, tvb, 12, 1, ENC_BIG_ENDIAN0x00000000); |
| 892 | |
| 893 | /* UDW 14: binary group 7 */ |
| 894 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_7, tvb, 13, 1, ENC_BIG_ENDIAN0x00000000); |
| 895 | |
| 896 | /* UDW 15: tens of hours, ST 12-1 flag bits 58 and 59 */ |
| 897 | proto_tree_add_item(time_tree, hf_st12_2_hour_tens, tvb, 14, 1, ENC_BIG_ENDIAN0x00000000); |
| 898 | proto_tree_add_item(time_tree, hf_st12_2_flag_bit_58, tvb, 14, 1, ENC_BIG_ENDIAN0x00000000); |
| 899 | proto_tree_add_item(time_tree, hf_st12_2_flag_bit_59, tvb, 14, 1, ENC_BIG_ENDIAN0x00000000); |
| 900 | |
| 901 | /* UDW 16: binary group 8 */ |
| 902 | proto_tree_add_item(time_tree, hf_st12_2_binary_group_8, tvb, 15, 1, ENC_BIG_ENDIAN0x00000000); |
| 903 | |
| 904 | /* |
| 905 | * SMPTE ST 12-2:2014, Secs. 6.2.1-6.2.2, Tables 2-3. |
| 906 | * DBB1 is assembled from b4 of UDW 1-8; DBB2 from b4 of UDW 9-16. |
| 907 | * These bytes are logical fields spread across multiple UDWs, so they |
| 908 | * are shown as generated aggregate values. |
| 909 | */ |
| 910 | for (x = 0; x < 8; x++) { |
| 911 | dbb1 |= tvb_get_bits8(tvb, (x) * 8 + 4, 1) << x; |
| 912 | dbb2 |= tvb_get_bits8(tvb, (8 + x) * 8 + 4, 1) << x; |
| 913 | } |
| 914 | |
| 915 | ti = proto_tree_add_uint(st12_tree, hf_st12_2_payload_type, tvb, 0, 0, dbb1); |
| 916 | proto_item_set_generated(ti); |
| 917 | |
| 918 | ti = proto_tree_add_uint(st12_tree, hf_st12_2_vitc, tvb, 0, 0, dbb2); |
| 919 | proto_item_set_generated(ti); |
| 920 | |
| 921 | if (dbb1 == 0x01 || dbb1 == 0x02) { |
| 922 | vitc_tree = proto_item_add_subtree(ti, ett_st12_2_vitc); |
| 923 | |
| 924 | ti = proto_tree_add_uint(vitc_tree, hf_st12_2_vitc_line_sel, tvb, 0, 0, dbb2); |
| 925 | proto_item_set_generated(ti); |
| 926 | ti = proto_tree_add_uint(vitc_tree, hf_st12_2_vitc_line_dup, tvb, 0, 0, dbb2); |
| 927 | proto_item_set_generated(ti); |
| 928 | ti = proto_tree_add_uint(vitc_tree, hf_st12_2_vitc_validity, tvb, 0, 0, dbb2); |
| 929 | proto_item_set_generated(ti); |
| 930 | ti = proto_tree_add_uint(vitc_tree, hf_st12_2_vitc_process, tvb, 0, 0, dbb2); |
| 931 | proto_item_set_generated(ti); |
| 932 | } |
| 933 | |
| 934 | proto_item_append_text(proto_tree_get_parent(st12_tree), ": %s", time_str); |
| 935 | |
| 936 | return tvb_captured_length(tvb); |
| 937 | } |
| 938 | |
| 939 | void |
| 940 | proto_register_st12_2(void) |
| 941 | { |
| 942 | static hf_register_info hf[] = { |
| 943 | { &hf_st12_2_timecode, |
| 944 | { "Time Code", "st12_2.timecode", FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 945 | |
| 946 | /* SMPTE ST 12-2:2014, Sec. 6.3, Table 6. */ |
| 947 | { &hf_st12_2_frame_units, |
| 948 | { "Frame Units", "st12_2.time.frames.units", FT_UINT8, BASE_DEC, NULL((void*)0), 0xF0, NULL((void*)0), |
| 949 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 950 | { &hf_st12_2_frame_tens, |
| 951 | { "Frame Tens", "st12_2.time.frames.tens", FT_UINT8, BASE_DEC, NULL((void*)0), 0x30, NULL((void*)0), |
| 952 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 953 | { &hf_st12_2_second_units, |
| 954 | { "Second Units", "st12_2.time.seconds.units", FT_UINT8, BASE_DEC, NULL((void*)0), 0xF0, NULL((void*)0), |
| 955 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 956 | { &hf_st12_2_second_tens, |
| 957 | { "Second Tens", "st12_2.time.seconds.tens", FT_UINT8, BASE_DEC, NULL((void*)0), 0x70, NULL((void*)0), |
| 958 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 959 | { &hf_st12_2_minute_units, |
| 960 | { "Minute Units", "st12_2.time.minutes.units", FT_UINT8, BASE_DEC, NULL((void*)0), 0xF0, NULL((void*)0), |
| 961 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 962 | { &hf_st12_2_minute_tens, |
| 963 | { "Minute Tens", "st12_2.time.minutes.tens", FT_UINT8, BASE_DEC, NULL((void*)0), 0x70, NULL((void*)0), |
| 964 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 965 | { &hf_st12_2_hour_units, |
| 966 | { "Hour Units", "st12_2.time.hours.units", FT_UINT8, BASE_DEC, NULL((void*)0), 0xF0, NULL((void*)0), |
| 967 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 968 | { &hf_st12_2_hour_tens, |
| 969 | { "Hour Tens", "st12_2.time.hours.tens", FT_UINT8, BASE_DEC, NULL((void*)0), 0x30, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 970 | |
| 971 | /* |
| 972 | * SMPTE ST 12-2:2014, Sec. 6.3, Table 6; |
| 973 | * SMPTE ST 12-1:2014, Table 3. |
| 974 | */ |
| 975 | { &hf_st12_2_flag_bit_10, |
| 976 | { "ST 12-1 Flag Bit 10 (Drop Frame in 30-frame systems)", "st12_2.flag.bit10", |
| 977 | FT_BOOLEAN, 8, NULL((void*)0), 0x40, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 978 | { &hf_st12_2_flag_bit_11, |
| 979 | { "ST 12-1 Flag Bit 11 (Color Frame in 30/25-frame systems)", "st12_2.flag.bit11", |
| 980 | FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 981 | { &hf_st12_2_flag_bit_27, |
| 982 | { "ST 12-1 Flag Bit 27", "st12_2.flag.bit27", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 983 | { &hf_st12_2_flag_bit_43, |
| 984 | { "ST 12-1 Flag Bit 43", "st12_2.flag.bit43", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 985 | { &hf_st12_2_flag_bit_58, |
| 986 | { "ST 12-1 Flag Bit 58", "st12_2.flag.bit58", FT_BOOLEAN, 8, NULL((void*)0), 0x40, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 987 | { &hf_st12_2_flag_bit_59, |
| 988 | { "ST 12-1 Flag Bit 59", "st12_2.flag.bit59", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 989 | |
| 990 | /* SMPTE ST 12-2:2014, Sec. 6.3, Table 6; ST 12-1 Secs. 8.4-8.5. */ |
| 991 | { &hf_st12_2_binary_group_1, |
| 992 | { "Binary Group 1", "st12_2.binary_group.1", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 993 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 994 | { &hf_st12_2_binary_group_2, |
| 995 | { "Binary Group 2", "st12_2.binary_group.2", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 996 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 997 | { &hf_st12_2_binary_group_3, |
| 998 | { "Binary Group 3", "st12_2.binary_group.3", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 999 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1000 | { &hf_st12_2_binary_group_4, |
| 1001 | { "Binary Group 4", "st12_2.binary_group.4", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 1002 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1003 | { &hf_st12_2_binary_group_5, |
| 1004 | { "Binary Group 5", "st12_2.binary_group.5", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 1005 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1006 | { &hf_st12_2_binary_group_6, |
| 1007 | { "Binary Group 6", "st12_2.binary_group.6", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 1008 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1009 | { &hf_st12_2_binary_group_7, |
| 1010 | { "Binary Group 7", "st12_2.binary_group.7", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 1011 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1012 | { &hf_st12_2_binary_group_8, |
| 1013 | { "Binary Group 8", "st12_2.binary_group.8", FT_UINT8, BASE_HEX, NULL((void*)0), 0xF0, NULL((void*)0), |
| 1014 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1015 | |
| 1016 | /* SMPTE ST 12-2:2014, Sec. 6.2.1, Table 2. */ |
| 1017 | { &hf_st12_2_payload_type, |
| 1018 | { "Payload Type", "st12_2.payload_type", FT_UINT8, BASE_HEX, |
| 1019 | VALS(st12_2_payload_type_vals)((0 ? (const struct _value_string*)0 : ((st12_2_payload_type_vals )))), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1020 | |
| 1021 | /* SMPTE ST 12-2:2014, Sec. 6.2.2, Tables 3-5. */ |
| 1022 | { &hf_st12_2_vitc, |
| 1023 | { "VITC Data", "st12_2.vitc", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1024 | { &hf_st12_2_vitc_line_sel, |
| 1025 | { "Line Select", "st12_2.vitc.line_sel", FT_UINT8, BASE_DEC, NULL((void*)0), 0x1F, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1026 | { &hf_st12_2_vitc_line_dup, |
| 1027 | { "Duplication", "st12_2.vitc.line_dup", FT_UINT8, BASE_DEC, NULL((void*)0), 0x20, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1028 | { &hf_st12_2_vitc_validity, |
| 1029 | { "TC Validity", "st12_2.vitc.validity", FT_UINT8, BASE_DEC, |
| 1030 | VALS(st12_2_vitc_validity_vals)((0 ? (const struct _value_string*)0 : ((st12_2_vitc_validity_vals )))), 0x40, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1031 | { &hf_st12_2_vitc_process, |
| 1032 | { "Process Bit", "st12_2.vitc.process", FT_UINT8, BASE_DEC, |
| 1033 | VALS(st12_2_vitc_process_vals)((0 ? (const struct _value_string*)0 : ((st12_2_vitc_process_vals )))), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1034 | }; |
| 1035 | static int *ett[] = { |
| 1036 | &ett_st12_2, |
| 1037 | &ett_st12_2_timecode, |
| 1038 | &ett_st12_2_vitc, |
| 1039 | }; |
| 1040 | static ei_register_info ei[] = { |
| 1041 | { &ei_st12_2_bad_length, |
| 1042 | { "st12_2.length.bad", PI_MALFORMED0x07000000, PI_WARN0x00600000, |
| 1043 | "ST 12-2 payload contains fewer than 16 UDW bytes", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1044 | }; |
| 1045 | expert_module_t *expert_st12_2; |
| 1046 | |
| 1047 | proto_st12_2 = proto_register_protocol( |
| 1048 | "SMPTE ST 12-2 Ancillary Time Code", "ST 12-2", "st12_2"); |
| 1049 | proto_register_field_array(proto_st12_2, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0])); |
| 1050 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0])); |
| 1051 | |
| 1052 | expert_st12_2 = expert_register_protocol(proto_st12_2); |
| 1053 | expert_register_field_array(expert_st12_2, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0])); |
| 1054 | |
| 1055 | st12_2_handle = register_dissector("st12_2", dissect_st12_2, proto_st12_2); |
| 1056 | } |
| 1057 | |
| 1058 | void |
| 1059 | proto_reg_handoff_st12_2(void) |
| 1060 | { |
| 1061 | dissector_add_uint("st291.did_sdid", ST12_2_DID_SDID_KEY0x6060, st12_2_handle); |
| 1062 | } |
| 1063 | |
| 1064 | /* |
| 1065 | * SMPTE ST 2010 SCTE-104 mapping |
| 1066 | */ |
| 1067 | |
| 1068 | static const fragment_items st2010_frag_items = { |
| 1069 | &ett_st2010_fragment, |
| 1070 | &ett_st2010_fragments, |
| 1071 | &hf_st2010_fragments, |
| 1072 | &hf_st2010_fragment, |
| 1073 | &hf_st2010_fragment_overlap, |
| 1074 | &hf_st2010_fragment_overlap_conflict, |
| 1075 | &hf_st2010_fragment_multiple_tails, |
| 1076 | &hf_st2010_fragment_too_long_fragment, |
| 1077 | &hf_st2010_fragment_error, |
| 1078 | &hf_st2010_fragment_count, |
| 1079 | &hf_st2010_reassembled_in, |
| 1080 | &hf_st2010_reassembled_length, |
| 1081 | &hf_st2010_reassembled_data, |
| 1082 | "ST 2010 message fragments" |
| 1083 | }; |
| 1084 | |
| 1085 | static void |
| 1086 | call_st2010_payload(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) |
| 1087 | { |
| 1088 | if (!dissector_try_uint(st2010_payload_table, ST2010_PAYLOAD_SCTE1040, |
| 1089 | tvb, pinfo, tree)) { |
| 1090 | call_data_dissector(tvb, pinfo, tree); |
| 1091 | } |
| 1092 | } |
| 1093 | |
| 1094 | /* SMPTE 2010-2008, Sec. 5.2, Tables 1-3; Sec. 5.4 for multi-packet reassembly. */ |
| 1095 | static int |
| 1096 | dissect_st2010(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) |
| 1097 | { |
| 1098 | const st291_vanc_dissector_data_t *st291_data = |
| 1099 | (const st291_vanc_dissector_data_t *)data; |
| 1100 | proto_tree *payload_tree = |
| 1101 | st291_data && st291_data->top_tree ? st291_data->top_tree : tree; |
| 1102 | const unsigned len = tvb_captured_length(tvb); |
| 1103 | uint8_t desc; |
| 1104 | unsigned version; |
| 1105 | bool_Bool continued_pkt; |
| 1106 | bool_Bool following_pkt; |
| 1107 | bool_Bool duplicate_msg; |
| 1108 | proto_item *ti; |
| 1109 | proto_tree *st2010_tree; |
| 1110 | fragment_head *fd_head; |
| 1111 | tvbuff_t *reassembled_tvb; |
| 1112 | bool_Bool save_fragmented; |
| 1113 | |
| 1114 | if (len < 1) |
| 1115 | return 0; |
| 1116 | |
| 1117 | desc = tvb_get_uint8(tvb, 0); |
| 1118 | version = (desc & 0x18) >> 3; |
| 1119 | continued_pkt = (desc & 0x04) != 0; |
| 1120 | following_pkt = (desc & 0x02) != 0; |
| 1121 | duplicate_msg = (desc & 0x01) != 0; |
| 1122 | |
| 1123 | col_set_str(pinfo->cinfo, COL_PROTOCOL, "ST2010"); |
| 1124 | |
| 1125 | ti = proto_tree_add_item(tree, proto_st2010, tvb, 0, -1, ENC_NA0x00000000); |
| 1126 | st2010_tree = proto_item_add_subtree(ti, ett_st2010); |
| 1127 | |
| 1128 | proto_tree_add_item(st2010_tree, hf_st2010_payload_descriptor, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1129 | proto_tree_add_item(st2010_tree, hf_st2010_reserved, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1130 | proto_tree_add_item(st2010_tree, hf_st2010_version, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1131 | proto_tree_add_item(st2010_tree, hf_st2010_continued_pkt, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1132 | proto_tree_add_item(st2010_tree, hf_st2010_following_pkt, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1133 | proto_tree_add_item(st2010_tree, hf_st2010_duplicate_msg, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1134 | |
| 1135 | if ((desc & 0xE0) != 0) |
| 1136 | expert_add_info(pinfo, ti, &ei_st2010_reserved_bits); |
| 1137 | if (version != 1) |
| 1138 | expert_add_info(pinfo, ti, &ei_st2010_bad_version); |
| 1139 | |
| 1140 | proto_item_append_text(ti, ": version %u%s%s%s", |
| 1141 | version, |
| 1142 | continued_pkt ? ", continued" : "", |
| 1143 | following_pkt ? ", following" : "", |
| 1144 | duplicate_msg ? ", duplicate" : ""); |
| 1145 | |
| 1146 | if (len <= 1) { |
| 1147 | expert_add_info(pinfo, ti, &ei_st2010_empty_payload); |
| 1148 | return len; |
| 1149 | } |
| 1150 | |
| 1151 | proto_tree_add_item(st2010_tree, hf_st2010_payload, tvb, 1, -1, ENC_NA0x00000000); |
| 1152 | |
| 1153 | /* Single-packet SCTE-104 message. */ |
| 1154 | if (!continued_pkt && !following_pkt) { |
| 1155 | tvbuff_t *msg_tvb = tvb_new_subset_remaining(tvb, 1); |
| 1156 | call_st2010_payload(msg_tvb, pinfo, payload_tree); |
| 1157 | return len; |
| 1158 | } |
| 1159 | |
| 1160 | /* |
| 1161 | * Fragmented ST 2010 message. ST 2010 supplies no fragment number or |
| 1162 | * message identifier, so fragments are appended in capture order. The |
| 1163 | * reassembly key is the enclosing flow (addresses + ports) plus ID 0. |
| 1164 | * ST 2010 permits only one complete SCTE-104 message per video frame, |
| 1165 | * so overlapping in-progress messages on one flow are malformed. |
| 1166 | */ |
| 1167 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) { |
| 1168 | fragment_head *active = fragment_get(&st2010_reassembly_table, pinfo, 0, NULL((void*)0)); |
| 1169 | |
| 1170 | if (!following_pkt) { |
| 1171 | if (active != NULL((void*)0)) { |
| 1172 | expert_add_info(pinfo, ti, &ei_st2010_overlapping_message); |
| 1173 | return len; |
| 1174 | } |
| 1175 | } else if (active == NULL((void*)0)) { |
| 1176 | expert_add_info(pinfo, ti, &ei_st2010_orphan_fragment); |
| 1177 | return len; |
| 1178 | } |
| 1179 | } |
| 1180 | |
| 1181 | save_fragmented = pinfo->fragmented; |
| 1182 | pinfo->fragmented = true1; |
| 1183 | fd_head = fragment_add_seq_next(&st2010_reassembly_table, |
| 1184 | tvb, 1, pinfo, 0, NULL((void*)0), |
| 1185 | len - 1, continued_pkt); |
| 1186 | |
| 1187 | reassembled_tvb = process_reassembled_data(tvb, 1, pinfo, |
| 1188 | "Reassembled SCTE-104 Message", |
| 1189 | fd_head, &st2010_frag_items, |
| 1190 | NULL((void*)0), st2010_tree); |
| 1191 | pinfo->fragmented = save_fragmented; |
| 1192 | |
| 1193 | if (reassembled_tvb != NULL((void*)0)) |
| 1194 | call_st2010_payload(reassembled_tvb, pinfo, payload_tree); |
| 1195 | |
| 1196 | return len; |
| 1197 | } |
| 1198 | |
| 1199 | void |
| 1200 | proto_register_st2010(void) |
| 1201 | { |
| 1202 | static hf_register_info hf[] = { |
| 1203 | { &hf_st2010_payload_descriptor, |
| 1204 | { "Payload Descriptor", "st2010.payload_descriptor", FT_UINT8, BASE_HEX, NULL((void*)0), 0x00, |
| 1205 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1206 | { &hf_st2010_reserved, |
| 1207 | { "Reserved", "st2010.reserved", FT_UINT8, BASE_HEX, NULL((void*)0), 0xE0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1208 | { &hf_st2010_version, |
| 1209 | { "Mapping Version", "st2010.version", FT_UINT8, BASE_DEC, NULL((void*)0), 0x18, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1210 | { &hf_st2010_continued_pkt, |
| 1211 | { "Continued Packet", "st2010.continued_pkt", FT_BOOLEAN, 8, NULL((void*)0), 0x04, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1212 | { &hf_st2010_following_pkt, |
| 1213 | { "Following Packet", "st2010.following_pkt", FT_BOOLEAN, 8, NULL((void*)0), 0x02, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1214 | { &hf_st2010_duplicate_msg, |
| 1215 | { "Duplicate Message", "st2010.duplicate_msg", FT_BOOLEAN, 8, NULL((void*)0), 0x01, NULL((void*)0), |
| 1216 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1217 | { &hf_st2010_payload, |
| 1218 | { "SCTE-104 Message Bytes", "st2010.payload", FT_BYTES, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), |
| 1219 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1220 | |
| 1221 | { &hf_st2010_fragments, |
| 1222 | |
| 1223 | { "Reassembled ST 2010 fragments", "st2010.fragments", FT_NONE, BASE_NONE, NULL((void*)0), |
| 1224 | |
| 1225 | 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1226 | { &hf_st2010_fragment, |
| 1227 | { "ST 2010 fragment", "st2010.fragment", FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), |
| 1228 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1229 | { &hf_st2010_fragment_overlap, |
| 1230 | { "ST 2010 fragment overlap", "st2010.fragment.overlap", FT_BOOLEAN, BASE_NONE, |
| 1231 | NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1232 | { &hf_st2010_fragment_overlap_conflict, |
| 1233 | { "ST 2010 fragment overlap conflict", "st2010.fragment.overlap.conflict", |
| 1234 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1235 | { &hf_st2010_fragment_multiple_tails, |
| 1236 | { "ST 2010 multiple tail fragments", "st2010.fragment.multiple_tails", FT_BOOLEAN, |
| 1237 | BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1238 | { &hf_st2010_fragment_too_long_fragment, |
| 1239 | { "ST 2010 fragment too long", "st2010.fragment.too_long_fragment", FT_BOOLEAN, |
| 1240 | BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1241 | { &hf_st2010_fragment_error, |
| 1242 | { "ST 2010 reassembly error in frame", "st2010.fragment.error", FT_FRAMENUM, |
| 1243 | BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1244 | { &hf_st2010_fragment_count, |
| 1245 | { "ST 2010 fragment count", "st2010.fragment.count", FT_UINT32, BASE_DEC, NULL((void*)0), |
| 1246 | 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1247 | { &hf_st2010_reassembled_in, |
| 1248 | { "Reassembled in", "st2010.reassembled.in", FT_FRAMENUM, BASE_NONE, NULL((void*)0), 0x00, |
| 1249 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1250 | { &hf_st2010_reassembled_length, |
| 1251 | { "Reassembled length", "st2010.reassembled.length", FT_UINT32, BASE_DEC, NULL((void*)0), |
| 1252 | 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1253 | { &hf_st2010_reassembled_data, |
| 1254 | { "Reassembled SCTE-104 data", "st2010.reassembled.data", FT_BYTES, BASE_NONE, NULL((void*)0), |
| 1255 | 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1256 | }; |
| 1257 | |
| 1258 | static int *ett[] = { |
| 1259 | &ett_st2010, |
| 1260 | &ett_st2010_fragment, |
| 1261 | &ett_st2010_fragments, |
| 1262 | }; |
| 1263 | |
| 1264 | static ei_register_info ei[] = { |
| 1265 | { &ei_st2010_bad_version, |
| 1266 | { "st2010.version.invalid", PI_PROTOCOL0x09000000, PI_WARN0x00600000, |
| 1267 | "ST 2010 mapping version is not Version 1", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1268 | { &ei_st2010_reserved_bits, |
| 1269 | { "st2010.reserved.nonzero", PI_PROTOCOL0x09000000, PI_WARN0x00600000, |
| 1270 | "Reserved Payload Descriptor bits are non-zero", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1271 | { &ei_st2010_orphan_fragment, |
| 1272 | { "st2010.fragment.orphan", PI_REASSEMBLE0x06000000, PI_WARN0x00600000, |
| 1273 | "Following ST 2010 fragment seen without a preceding first fragment", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1274 | { &ei_st2010_overlapping_message, |
| 1275 | { "st2010.fragment.overlap_message", PI_REASSEMBLE0x06000000, PI_WARN0x00600000, |
| 1276 | "New ST 2010 message started while another message is still being reassembled", |
| 1277 | EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1278 | { &ei_st2010_empty_payload, |
| 1279 | { "st2010.payload.empty", PI_MALFORMED0x07000000, PI_WARN0x00600000, |
| 1280 | "ST 2010 packet contains a Payload Descriptor but no SCTE-104 bytes", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1281 | }; |
| 1282 | |
| 1283 | expert_module_t *expert; |
| 1284 | |
| 1285 | proto_st2010 = proto_register_protocol("SMPTE ST 2010", "ST 2010", "st2010"); |
| 1286 | proto_register_field_array(proto_st2010, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0])); |
| 1287 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0])); |
| 1288 | |
| 1289 | expert = expert_register_protocol(proto_st2010); |
| 1290 | expert_register_field_array(expert, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0])); |
| 1291 | |
| 1292 | reassembly_table_register(&st2010_reassembly_table, |
| 1293 | &addresses_ports_reassembly_table_functions); |
| 1294 | |
| 1295 | /* |
| 1296 | * Public payload table. Key 0 is the complete SCTE-104 message. A Lua |
| 1297 | * dissector can register here after all compiled dissectors initialize. |
| 1298 | */ |
| 1299 | st2010_payload_table = register_dissector_table( |
| 1300 | "st2010.payload_type", "ST 2010 Payload Type", proto_st2010, FT_UINT8, BASE_DEC); |
| 1301 | |
| 1302 | st2010_handle = register_dissector("st2010", dissect_st2010, proto_st2010); |
| 1303 | } |
| 1304 | |
| 1305 | void |
| 1306 | proto_reg_handoff_st2010(void) |
| 1307 | { |
| 1308 | dissector_add_uint("st291.did_sdid", ST2010_DID_SDID_KEY0x4107, st2010_handle); |
| 1309 | } |
| 1310 | |
| 1311 | /* |
| 1312 | * SMPTE ST 2016-3 active format description and bar data |
| 1313 | */ |
| 1314 | |
| 1315 | static const struct true_false_string st2016_3_tfs_afd_ar = { |
| 1316 | "16:9 coded frame", |
| 1317 | "4:3 coded frame" |
| 1318 | }; |
| 1319 | |
| 1320 | /* SMPTE ST 2016-1:2009, Sec. 5, Table 1 -- AFD code meaning depends on coded-frame AR. */ |
| 1321 | static const char * |
| 1322 | st2016_3_afd_description(uint8_t afd, bool_Bool ar_16_9) |
| 1323 | { |
| 1324 | static const char *const afd_4_3[16] = { |
| 1325 | "Undefined", |
| 1326 | "Reserved", |
| 1327 | "Letterbox 16:9 image, at top of coded frame", |
| 1328 | "Letterbox 14:9 image, at top of coded frame", |
| 1329 | "Letterbox image with aspect ratio greater than 16:9, vertically centered", |
| 1330 | "Reserved", |
| 1331 | "Reserved", |
| 1332 | "Reserved", |
| 1333 | "Full frame 4:3 image, same as coded frame", |
| 1334 | "Full frame 4:3 image, same as coded frame", |
| 1335 | "Letterbox 16:9 image, vertically centered, all image areas protected", |
| 1336 | "Letterbox 14:9 image, vertically centered", |
| 1337 | "Reserved", |
| 1338 | "Full frame 4:3 image, with alternative 14:9 center", |
| 1339 | "Letterbox 16:9 image, with alternative 14:9 center", |
| 1340 | "Letterbox 16:9 image, with alternative 4:3 center" |
| 1341 | }; |
| 1342 | static const char *const afd_16_9[16] = { |
| 1343 | "Undefined", |
| 1344 | "Reserved", |
| 1345 | "Full frame 16:9 image, same as coded frame", |
| 1346 | "Pillarbox 14:9 image, horizontally centered", |
| 1347 | "Letterbox image with aspect ratio greater than 16:9, vertically centered", |
| 1348 | "Reserved", |
| 1349 | "Reserved", |
| 1350 | "Reserved", |
| 1351 | "Full frame 16:9 image, same as coded frame", |
| 1352 | "Pillarbox 4:3 image, horizontally centered", |
| 1353 | "Full frame 16:9 image, all image areas protected", |
| 1354 | "Pillarbox 14:9 image, horizontally centered", |
| 1355 | "Reserved", |
| 1356 | "Pillarbox 4:3 image, with alternative 14:9 center", |
| 1357 | "Full frame 16:9 image, with alternative 14:9 center", |
| 1358 | "Full frame 16:9 image, with alternative 4:3 center" |
| 1359 | }; |
| 1360 | |
| 1361 | return ar_16_9 ? afd_16_9[afd & 0x0f] : afd_4_3[afd & 0x0f]; |
| 1362 | } |
| 1363 | |
| 1364 | /* SMPTE ST 2016-1:2009, Secs. 6, 9.2.1-9.2.2, Tables 3, 5 and 6. */ |
| 1365 | static const char * |
| 1366 | st2016_3_bar_value_meaning(unsigned value_index, bool_Bool top, bool_Bool bottom, bool_Bool left, bool_Bool right) |
| 1367 | { |
| 1368 | if (value_index == 1) { |
| 1369 | if (top) |
| 1370 | return "Line number: end of top bar"; |
| 1371 | if (bottom) |
| 1372 | return "Line number: start of bottom bar"; |
| 1373 | if (left) |
| 1374 | return "Pixel number: end of left bar"; |
| 1375 | if (right) |
| 1376 | return "Pixel number: start of right bar"; |
| 1377 | } else { |
| 1378 | if (top && bottom) |
| 1379 | return "Line number: start of bottom bar"; |
| 1380 | if (left && right) |
| 1381 | return "Pixel number: start of right bar"; |
| 1382 | } |
| 1383 | |
| 1384 | return "No valid Bar Data value"; |
| 1385 | } |
| 1386 | |
| 1387 | static int |
| 1388 | dissect_st2016_3(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) |
| 1389 | { |
| 1390 | const st291_vanc_dissector_data_t *st291_data = |
| 1391 | (const st291_vanc_dissector_data_t *)data; |
| 1392 | proto_tree *top_tree = |
| 1393 | st291_data && st291_data->top_tree ? st291_data->top_tree : tree; |
| 1394 | proto_item *ti; |
| 1395 | proto_item *root_ti; |
| 1396 | proto_tree *st2016_tree; |
| 1397 | proto_tree *afd_tree; |
| 1398 | proto_tree *flags_tree; |
| 1399 | proto_tree *value_tree; |
| 1400 | unsigned len = tvb_captured_length(tvb); |
| 1401 | uint8_t afd_byte; |
| 1402 | uint8_t afd; |
| 1403 | bool_Bool ar_16_9; |
| 1404 | uint8_t flags; |
| 1405 | bool_Bool top; |
| 1406 | bool_Bool bottom; |
| 1407 | bool_Bool left; |
| 1408 | bool_Bool right; |
| 1409 | uint16_t value1; |
| 1410 | uint16_t value2; |
| 1411 | const char *meaning1; |
| 1412 | const char *meaning2; |
| 1413 | |
| 1414 | root_ti = proto_tree_add_item(top_tree, proto_st2016_3, tvb, 0, len, ENC_NA0x00000000); |
| 1415 | st2016_tree = proto_item_add_subtree(root_ti, ett_st2016_3); |
| 1416 | |
| 1417 | if (len != 8) { |
| 1418 | expert_add_info_format(pinfo, root_ti, &ei_st2016_3_bad_length, |
| 1419 | "ST 2016-3 requires 8 UDW bytes; packet contains %u", |
| 1420 | len); |
| 1421 | return len; |
| 1422 | } |
| 1423 | |
| 1424 | /* SMPTE ST 2016-3:2009, Sec. 4.1, Table 1 maps UDW1 to the |
| 1425 | * ST 2016-1 AFD byte; ST 2016-1:2009, Sec. 9.1, Table 4 defines |
| 1426 | * reserved bits, active_format and coded_frame_aspect_ratio. */ |
| 1427 | afd_byte = tvb_get_uint8(tvb, 0); |
| 1428 | afd = (afd_byte >> 3) & 0x0f; |
| 1429 | ar_16_9 = (afd_byte & 0x04) != 0; |
| 1430 | |
| 1431 | ti = proto_tree_add_item(st2016_tree, hf_st2016_3_afd_byte, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1432 | afd_tree = proto_item_add_subtree(ti, ett_st2016_3_afd); |
| 1433 | proto_tree_add_item(afd_tree, hf_st2016_3_afd_reserved, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1434 | proto_tree_add_uint_format_value(afd_tree, hf_st2016_3_afd_code, tvb, 0, 1, afd, |
| 1435 | "%u (%s)", afd, |
| 1436 | st2016_3_afd_description(afd, ar_16_9)); |
| 1437 | proto_tree_add_item(afd_tree, hf_st2016_3_afd_ar, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 1438 | |
| 1439 | if ((afd_byte & 0x83) != 0) |
| 1440 | expert_add_info(pinfo, ti, &ei_st2016_3_afd_reserved); |
| 1441 | |
| 1442 | /* SMPTE ST 2016-3:2009, Sec. 4.1, Table 1 -- UDW2 and UDW3 are reserved. */ |
| 1443 | ti = proto_tree_add_item(st2016_tree, hf_st2016_3_reserved_1, tvb, 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1444 | if (tvb_get_uint8(tvb, 1) != 0) |
| 1445 | expert_add_info(pinfo, ti, &ei_st2016_3_reserved_udw); |
| 1446 | |
| 1447 | ti = proto_tree_add_item(st2016_tree, hf_st2016_3_reserved_2, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 1448 | if (tvb_get_uint8(tvb, 2) != 0) |
| 1449 | expert_add_info(pinfo, ti, &ei_st2016_3_reserved_udw); |
| 1450 | |
| 1451 | /* SMPTE ST 2016-3:2009, Sec. 4.1, Table 1 maps UDW4 to Bar Data flags; |
| 1452 | * SMPTE ST 2016-1:2009, Sec. 9.2.1, Table 5 defines top/bottom/left/right. */ |
| 1453 | flags = tvb_get_uint8(tvb, 3); |
| 1454 | top = (flags & 0x80) != 0; |
| 1455 | bottom = (flags & 0x40) != 0; |
| 1456 | left = (flags & 0x20) != 0; |
| 1457 | right = (flags & 0x10) != 0; |
| 1458 | |
| 1459 | ti = proto_tree_add_item(st2016_tree, hf_st2016_3_bar_flags, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1460 | flags_tree = proto_item_add_subtree(ti, ett_st2016_3_bar_flags); |
| 1461 | proto_tree_add_item(flags_tree, hf_st2016_3_bar_top, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1462 | proto_tree_add_item(flags_tree, hf_st2016_3_bar_bottom, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1463 | proto_tree_add_item(flags_tree, hf_st2016_3_bar_left, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1464 | proto_tree_add_item(flags_tree, hf_st2016_3_bar_right, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1465 | proto_tree_add_item(flags_tree, hf_st2016_3_bar_reserved, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1466 | |
| 1467 | if ((flags & 0x0f) != 0) |
| 1468 | expert_add_info(pinfo, ti, &ei_st2016_3_bar_reserved); |
| 1469 | |
| 1470 | if ((top != bottom) || (left != right) || ((top || bottom) && (left || right))) |
| 1471 | expert_add_info(pinfo, ti, &ei_st2016_3_bar_flags_invalid); |
| 1472 | |
| 1473 | /* SMPTE ST 2016-3:2009, Sec. 4.1, Table 1 maps UDW5-UDW8 to |
| 1474 | * Bar Data Value 1/2; ST 2016-1:2009, Sec. 9.2.2, Table 6 defines |
| 1475 | * marker bits and the 14-bit line/pixel values. */ |
| 1476 | value1 = tvb_get_ntohs(tvb, 4); |
| 1477 | value2 = tvb_get_ntohs(tvb, 6); |
| 1478 | meaning1 = st2016_3_bar_value_meaning(1, top, bottom, left, right); |
| 1479 | meaning2 = st2016_3_bar_value_meaning(2, top, bottom, left, right); |
| 1480 | |
| 1481 | ti = proto_tree_add_item(st2016_tree, hf_st2016_3_bar_value_1, tvb, 4, 2, ENC_BIG_ENDIAN0x00000000); |
| 1482 | value_tree = proto_item_add_subtree(ti, ett_st2016_3_bar_value_1); |
| 1483 | proto_tree_add_item(value_tree, hf_st2016_3_bar_value_1_marker, tvb, 4, 2, ENC_BIG_ENDIAN0x00000000); |
| 1484 | proto_tree_add_item(value_tree, hf_st2016_3_bar_value_1_data, tvb, 4, 2, ENC_BIG_ENDIAN0x00000000); |
| 1485 | ti = proto_tree_add_string(value_tree, hf_st2016_3_bar_value_1_meaning, tvb, 4, 0, |
| 1486 | meaning1); |
| 1487 | proto_item_set_generated(ti); |
| 1488 | |
| 1489 | ti = proto_tree_add_item(st2016_tree, hf_st2016_3_bar_value_2, tvb, 6, 2, ENC_BIG_ENDIAN0x00000000); |
| 1490 | value_tree = proto_item_add_subtree(ti, ett_st2016_3_bar_value_2); |
| 1491 | proto_tree_add_item(value_tree, hf_st2016_3_bar_value_2_marker, tvb, 6, 2, ENC_BIG_ENDIAN0x00000000); |
| 1492 | proto_tree_add_item(value_tree, hf_st2016_3_bar_value_2_data, tvb, 6, 2, ENC_BIG_ENDIAN0x00000000); |
| 1493 | ti = proto_tree_add_string(value_tree, hf_st2016_3_bar_value_2_meaning, tvb, 6, 0, |
| 1494 | meaning2); |
| 1495 | proto_item_set_generated(ti); |
| 1496 | |
| 1497 | if (top || bottom || left || right) { |
| 1498 | if ((value1 & 0xc000) != 0xc000) |
| 1499 | expert_add_info(pinfo, ti, &ei_st2016_3_bar_marker); |
| 1500 | if ((top && bottom) || (left && right)) { |
| 1501 | if ((value2 & 0xc000) != 0xc000) |
| 1502 | expert_add_info(pinfo, ti, &ei_st2016_3_bar_marker); |
| 1503 | } |
| 1504 | } |
| 1505 | |
| 1506 | proto_item_append_text(root_ti, ": AFD: %s in %s mode", |
| 1507 | st2016_3_afd_description(afd, ar_16_9), |
| 1508 | ar_16_9 ? "16:9" : "4:3"); |
| 1509 | |
| 1510 | return len; |
| 1511 | } |
| 1512 | |
| 1513 | void |
| 1514 | proto_register_st2016_3(void) |
| 1515 | { |
| 1516 | static hf_register_info hf[] = { |
| 1517 | { &hf_st2016_3_afd_byte, |
| 1518 | { "AFD Information", "st2016_3.afd", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1519 | { &hf_st2016_3_afd_code, |
| 1520 | { "AFD Code", "st2016_3.afd.code", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1521 | { &hf_st2016_3_afd_ar, |
| 1522 | { "Coded Frame Aspect Ratio", "st2016_3.afd.ar", FT_BOOLEAN, 8, |
| 1523 | TFS(&st2016_3_tfs_afd_ar)((0 ? (const struct true_false_string*)0 : ((&st2016_3_tfs_afd_ar )))), 0x04, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1524 | { &hf_st2016_3_afd_reserved, |
| 1525 | { "Reserved", "st2016_3.afd.reserved", FT_UINT8, BASE_HEX, NULL((void*)0), 0x83, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1526 | { &hf_st2016_3_reserved_1, |
| 1527 | { "Reserved UDW 2", "st2016_3.reserved1", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1528 | { &hf_st2016_3_reserved_2, |
| 1529 | { "Reserved UDW 3", "st2016_3.reserved2", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1530 | { &hf_st2016_3_bar_flags, |
| 1531 | { "Bar Data Flags", "st2016_3.bar.flags", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1532 | { &hf_st2016_3_bar_top, |
| 1533 | { "Top Bar Present", "st2016_3.bar.top", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1534 | { &hf_st2016_3_bar_bottom, |
| 1535 | { "Bottom Bar Present", "st2016_3.bar.bottom", FT_BOOLEAN, 8, NULL((void*)0), 0x40, NULL((void*)0), |
| 1536 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1537 | { &hf_st2016_3_bar_left, |
| 1538 | { "Left Bar Present", "st2016_3.bar.left", FT_BOOLEAN, 8, NULL((void*)0), 0x20, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1539 | { &hf_st2016_3_bar_right, |
| 1540 | { "Right Bar Present", "st2016_3.bar.right", FT_BOOLEAN, 8, NULL((void*)0), 0x10, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1541 | { &hf_st2016_3_bar_reserved, |
| 1542 | { "Reserved", "st2016_3.bar.reserved", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0f, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1543 | { &hf_st2016_3_bar_value_1, |
| 1544 | { "Bar Data Value 1", "st2016_3.bar.value1", FT_UINT16, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), |
| 1545 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1546 | { &hf_st2016_3_bar_value_1_marker, |
| 1547 | { "Marker Bits", "st2016_3.bar.value1.marker", FT_UINT16, BASE_HEX, NULL((void*)0), 0xc000, |
| 1548 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1549 | { &hf_st2016_3_bar_value_1_data, |
| 1550 | { "Line/Pixel Number", "st2016_3.bar.value1.data", FT_UINT16, BASE_DEC, NULL((void*)0), |
| 1551 | 0x3fff, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1552 | { &hf_st2016_3_bar_value_2, |
| 1553 | { "Bar Data Value 2", "st2016_3.bar.value2", FT_UINT16, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), |
| 1554 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1555 | { &hf_st2016_3_bar_value_2_marker, |
| 1556 | { "Marker Bits", "st2016_3.bar.value2.marker", FT_UINT16, BASE_HEX, NULL((void*)0), 0xc000, |
| 1557 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1558 | { &hf_st2016_3_bar_value_2_data, |
| 1559 | { "Line/Pixel Number", "st2016_3.bar.value2.data", FT_UINT16, BASE_DEC, NULL((void*)0), |
| 1560 | 0x3fff, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1561 | { &hf_st2016_3_bar_value_1_meaning, |
| 1562 | { "Meaning", "st2016_3.bar.value1.meaning", FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), |
| 1563 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1564 | { &hf_st2016_3_bar_value_2_meaning, |
| 1565 | { "Meaning", "st2016_3.bar.value2.meaning", FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), |
| 1566 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 1567 | }; |
| 1568 | |
| 1569 | static int *ett[] = { |
| 1570 | &ett_st2016_3, |
| 1571 | &ett_st2016_3_afd, |
| 1572 | &ett_st2016_3_bar_flags, |
| 1573 | &ett_st2016_3_bar_value_1, |
| 1574 | &ett_st2016_3_bar_value_2, |
| 1575 | }; |
| 1576 | |
| 1577 | static ei_register_info ei[] = { |
| 1578 | { &ei_st2016_3_bad_length, |
| 1579 | { "st2016_3.length.bad", PI_MALFORMED0x07000000, PI_WARN0x00600000, |
| 1580 | "ST 2016-3 payload length is not 8 bytes", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1581 | { &ei_st2016_3_afd_reserved, |
| 1582 | { "st2016_3.afd.reserved.bad", PI_PROTOCOL0x09000000, PI_WARN0x00600000, |
| 1583 | "Reserved AFD bits are not zero", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1584 | { &ei_st2016_3_reserved_udw, |
| 1585 | { "st2016_3.reserved_udw.bad", PI_PROTOCOL0x09000000, PI_WARN0x00600000, |
| 1586 | "Reserved ST 2016-3 UDW is not zero", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1587 | { &ei_st2016_3_bar_reserved, |
| 1588 | { "st2016_3.bar.reserved.bad", PI_PROTOCOL0x09000000, PI_WARN0x00600000, |
| 1589 | "Reserved Bar Data flag bits are not zero", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1590 | { &ei_st2016_3_bar_flags_invalid, |
| 1591 | { "st2016_3.bar.flags.invalid", PI_PROTOCOL0x09000000, PI_WARN0x00600000, |
| 1592 | "Bar Data flags must specify Top+Bottom, Left+Right, or no bars", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1593 | { &ei_st2016_3_bar_marker, |
| 1594 | { "st2016_3.bar.marker.bad", PI_PROTOCOL0x09000000, PI_WARN0x00600000, |
| 1595 | "Bar Data value marker bits are not binary '11'", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 1596 | }; |
| 1597 | |
| 1598 | expert_module_t *expert_st2016_3; |
| 1599 | |
| 1600 | proto_st2016_3 = proto_register_protocol( |
| 1601 | "SMPTE ST 2016-3 AFD and Bar Data", "ST 2016-3", "st2016_3"); |
| 1602 | |
| 1603 | proto_register_field_array(proto_st2016_3, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0])); |
| 1604 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0])); |
| 1605 | |
| 1606 | expert_st2016_3 = expert_register_protocol(proto_st2016_3); |
| 1607 | expert_register_field_array(expert_st2016_3, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0])); |
| 1608 | |
| 1609 | st2016_3_handle = |
| 1610 | register_dissector("st2016_3", dissect_st2016_3, proto_st2016_3); |
| 1611 | } |
| 1612 | |
| 1613 | void |
| 1614 | proto_reg_handoff_st2016_3(void) |
| 1615 | { |
| 1616 | dissector_add_uint("st291.did_sdid", ST2016_3_DID_SDID_KEY0x4105, st2016_3_handle); |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * SMPTE ST 334-2 Caption Distribution Packet |
| 1621 | */ |
| 1622 | |
| 1623 | |
| 1624 | /* SMPTE ST 334-2:2015, Sec. 5.2, Table 3 -- cdp_frame_rate values. */ |
| 1625 | static const value_string st334_2_frame_rate_vals[] = { |
| 1626 | { 0x0, "Forbidden" }, |
| 1627 | { 0x1, "24000/1001 (~23.976 fps)" }, |
| 1628 | { 0x2, "24 fps" }, |
| 1629 | { 0x3, "25 fps" }, |
| 1630 | { 0x4, "30000/1001 (~29.97 fps)" }, |
| 1631 | { 0x5, "30 fps" }, |
| 1632 | { 0x6, "50 fps" }, |
| 1633 | { 0x7, "60000/1001 (~59.94 fps)" }, |
| 1634 | { 0x8, "60 fps" }, |
| 1635 | { 0, NULL((void*)0) } |
| 1636 | }; |
| 1637 | |
| 1638 | /* SMPTE ST 334-2:2015, Sec. 5.1, Table 1; Secs. 5.3-5.7 -- CDP section IDs. */ |
| 1639 | static const value_string st334_2_section_id_vals[] = { |
| 1640 | { 0x71, "Time Code Section" }, |
| 1641 | { 0x72, "CC Data Section" }, |
| 1642 | { 0x73, "CC Service Information Section" }, |
| 1643 | { 0x74, "CDP Footer" }, |
| 1644 | { 0, NULL((void*)0) } |
| 1645 | }; |
| 1646 | |
| 1647 | /* SMPTE ST 334-2:2015, Sec. 5.4, Table 5; cc_type semantics are inherited from CEA-708. */ |
| 1648 | static const value_string st334_2_cc_type_vals[] = { |
| 1649 | { 0x0, "NTSC line 21 field 1 closed captions (CEA-608)" }, |
| 1650 | { 0x1, "NTSC line 21 field 2 closed captions (CEA-608)" }, |
| 1651 | { 0x2, "DTVCC channel packet data" }, |
| 1652 | { 0x3, "DTVCC channel packet start" }, |
| 1653 | { 0, NULL((void*)0) } |
| 1654 | }; |
| 1655 | |
| 1656 | static const struct true_false_string st334_2_tfs_present = { |
| 1657 | "Present", "Not present" |
| 1658 | }; |
| 1659 | |
| 1660 | static const struct true_false_string st334_2_tfs_valid = { |
| 1661 | "Valid", "Invalid" |
| 1662 | }; |
| 1663 | |
| 1664 | /* SMPTE ST 334-2:2015, Sec. 5.4, Table 5 -- required cc_count for each cdp_frame_rate. */ |
| 1665 | static unsigned |
| 1666 | st334_2_expected_cc_count(uint8_t frame_rate) |
| 1667 | { |
| 1668 | switch (frame_rate) { |
| 1669 | case 0x1: |
| 1670 | case 0x2: |
| 1671 | return 25; |
| 1672 | case 0x3: |
| 1673 | return 24; |
| 1674 | case 0x4: |
| 1675 | case 0x5: |
| 1676 | return 20; |
| 1677 | case 0x6: |
| 1678 | return 12; |
| 1679 | case 0x7: |
| 1680 | case 0x8: |
| 1681 | return 10; |
| 1682 | default: |
| 1683 | return 0; |
| 1684 | } |
| 1685 | } |
| 1686 | |
| 1687 | /* SMPTE ST 334-2:2015, Sec. 5.6, Table 7 -- CDP checksum makes the modulo-256 packet sum zero. */ |
| 1688 | static uint8_t |
| 1689 | st334_2_cdp_checksum(tvbuff_t *tvb, unsigned length) |
| 1690 | { |
| 1691 | unsigned i; |
| 1692 | uint8_t sum = 0; |
| 1693 | |
| 1694 | for (i = 0; i < length; i++) |
| 1695 | sum = (uint8_t)(sum + tvb_get_uint8(tvb, i)); |
| 1696 | |
| 1697 | return sum; |
| 1698 | } |
| 1699 | |
| 1700 | /* SMPTE ST 334-2:2015, Sec. 5.1, Table 1 -- required CDP section ordering. */ |
| 1701 | static unsigned |
| 1702 | st334_2_section_rank(uint8_t id) |
| 1703 | { |
| 1704 | switch (id) { |
| 1705 | case 0x71: return 1; |
| 1706 | case 0x72: return 2; |
| 1707 | case 0x73: return 3; |
| 1708 | case 0x74: return 5; |
| 1709 | default: |
| 1710 | if (id >= 0x75 && id <= 0xef) |
| 1711 | return 4; |
| 1712 | return 0; |
| 1713 | } |
| 1714 | } |
| 1715 | |
| 1716 | /* SMPTE ST 334-2:2015, Sec. 5, Tables 1-8 -- complete CDP syntax. */ |
| 1717 | static int |
| 1718 | dissect_st334_2(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) |
| 1719 | { |
| 1720 | const st291_vanc_dissector_data_t *st291_data = |
| 1721 | (const st291_vanc_dissector_data_t *)data; |
| 1722 | proto_tree *top_tree = st291_data && st291_data->top_tree ? |
| 1723 | st291_data->top_tree : tree; |
| 1724 | proto_item *ti; |
| 1725 | proto_item *root_ti; |
| 1726 | proto_tree *cdp_tree; |
| 1727 | proto_tree *header_tree; |
| 1728 | unsigned captured_len = tvb_captured_length(tvb); |
| 1729 | unsigned parse_len; |
| 1730 | unsigned offset; |
| 1731 | unsigned previous_rank = 0; |
| 1732 | uint16_t identifier; |
| 1733 | uint8_t declared_len; |
| 1734 | uint8_t frame_rate; |
| 1735 | uint8_t flags; |
| 1736 | uint16_t header_sequence; |
| 1737 | bool_Bool time_present; |
| 1738 | bool_Bool cc_present; |
| 1739 | bool_Bool svc_present; |
| 1740 | bool_Bool seen_time = false0; |
| 1741 | bool_Bool seen_cc = false0; |
| 1742 | bool_Bool seen_svc = false0; |
| 1743 | bool_Bool seen_footer = false0; |
| 1744 | |
| 1745 | ti = proto_tree_add_item(top_tree, proto_st334_2, tvb, 0, -1, ENC_NA0x00000000); |
| 1746 | cdp_tree = proto_item_add_subtree(ti, ett_st334_2); |
| 1747 | |
| 1748 | if (captured_len < 7) { |
| 1749 | expert_add_info_format(pinfo, ti, &ei_st334_2_bad_length, |
| 1750 | "ST 334-2 requires at least 7 UDW bytes; packet contains %u", |
| 1751 | captured_len); |
| 1752 | return captured_len; |
| 1753 | } |
| 1754 | |
| 1755 | identifier = tvb_get_ntohs(tvb, 0); |
| 1756 | declared_len = tvb_get_uint8(tvb, 2); |
| 1757 | frame_rate = (tvb_get_uint8(tvb, 3) >> 4) & 0x0f; |
| 1758 | flags = tvb_get_uint8(tvb, 4); |
| 1759 | header_sequence = tvb_get_ntohs(tvb, 5); |
| 1760 | |
| 1761 | if (declared_len < 7 || declared_len > captured_len) |
| 1762 | parse_len = captured_len; |
| 1763 | else |
| 1764 | parse_len = declared_len; |
| 1765 | |
| 1766 | root_ti = ti; |
| 1767 | proto_item_set_len(ti, parse_len); |
| 1768 | proto_item_append_text(ti, ", sequence %u", header_sequence); |
| 1769 | |
| 1770 | /* SMPTE ST 334-2:2015, Sec. 5.2, Tables 2-3 -- cdp_header(). */ |
| 1771 | header_tree = proto_tree_add_subtree(cdp_tree, tvb, 0, 7, |
| 1772 | ett_st334_2_header, NULL((void*)0), "CDP Header"); |
| 1773 | |
| 1774 | ti = proto_tree_add_item(header_tree, hf_st334_2_cdp_identifier, tvb, 0, 2, ENC_BIG_ENDIAN0x00000000); |
| 1775 | if (identifier != ST334_2_CDP_IDENTIFIER0x9669) |
| 1776 | expert_add_info_format(pinfo, ti, &ei_st334_2_bad_identifier, |
| 1777 | "CDP identifier is 0x%04x; expected 0x%04x", |
| 1778 | identifier, ST334_2_CDP_IDENTIFIER0x9669); |
| 1779 | |
| 1780 | ti = proto_tree_add_item(header_tree, hf_st334_2_cdp_length, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 1781 | if (declared_len != captured_len) |
| 1782 | expert_add_info_format(pinfo, ti, &ei_st334_2_bad_length, |
| 1783 | "CDP length is %u bytes, but ST 291 UDW payload contains %u bytes", |
| 1784 | declared_len, captured_len); |
| 1785 | |
| 1786 | proto_tree_add_item(header_tree, hf_st334_2_frame_rate, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1787 | ti = proto_tree_add_item(header_tree, hf_st334_2_header_reserved, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1788 | if ((tvb_get_uint8(tvb, 3) & 0x0f) != 0x0f) |
| 1789 | expert_add_info(pinfo, ti, &ei_st334_2_bad_reserved); |
| 1790 | |
| 1791 | proto_tree_add_item(header_tree, hf_st334_2_time_code_present, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1792 | proto_tree_add_item(header_tree, hf_st334_2_ccdata_present, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1793 | proto_tree_add_item(header_tree, hf_st334_2_svcinfo_present, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1794 | proto_tree_add_item(header_tree, hf_st334_2_svc_info_start, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1795 | proto_tree_add_item(header_tree, hf_st334_2_svc_info_change, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1796 | proto_tree_add_item(header_tree, hf_st334_2_svc_info_complete, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1797 | proto_tree_add_item(header_tree, hf_st334_2_caption_service_active, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1798 | ti = proto_tree_add_item(header_tree, hf_st334_2_header_reserved_bit, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1799 | if ((flags & 0x01) == 0) |
| 1800 | expert_add_info(pinfo, ti, &ei_st334_2_bad_reserved); |
| 1801 | |
| 1802 | proto_tree_add_item(header_tree, hf_st334_2_header_sequence_counter, tvb, 5, 2, ENC_BIG_ENDIAN0x00000000); |
| 1803 | |
| 1804 | time_present = (flags & 0x80) != 0; |
| 1805 | cc_present = (flags & 0x40) != 0; |
| 1806 | svc_present = (flags & 0x20) != 0; |
| 1807 | |
| 1808 | offset = 7; |
| 1809 | while (offset < parse_len) { |
| 1810 | uint8_t id; |
| 1811 | unsigned rank; |
| 1812 | unsigned section_len = 0; |
| 1813 | |
| 1814 | if (!tvb_bytes_exist(tvb, offset, 1)) |
| 1815 | break; |
| 1816 | |
| 1817 | id = tvb_get_uint8(tvb, offset); |
| 1818 | rank = st334_2_section_rank(id); |
| 1819 | |
| 1820 | if (rank != 0 && rank < previous_rank) { |
| 1821 | ti = proto_tree_add_item(cdp_tree, hf_st334_2_section_id, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000); |
| 1822 | expert_add_info(pinfo, ti, &ei_st334_2_bad_section_order); |
| 1823 | } |
| 1824 | if (rank != 0 && rank > previous_rank) |
| 1825 | previous_rank = rank; |
| 1826 | |
| 1827 | /* SMPTE ST 334-2:2015, Sec. 5.3, Table 4 -- time_code_section(). */ |
| 1828 | if (id == 0x71) { |
| 1829 | proto_tree *section_tree; |
| 1830 | uint8_t b1, b2, b3, b4; |
| 1831 | unsigned hours, minutes, seconds, frames; |
| 1832 | char time_str[48]; |
| 1833 | |
| 1834 | if (!tvb_bytes_exist(tvb, offset, 5) || offset + 5 > parse_len) { |
| 1835 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 1836 | "Truncated CDP time code section"); |
| 1837 | break; |
| 1838 | } |
| 1839 | section_len = 5; |
| 1840 | section_tree = proto_tree_add_subtree(cdp_tree, tvb, offset, section_len, |
| 1841 | ett_st334_2_timecode, NULL((void*)0), "Time Code Section"); |
| 1842 | ti = proto_tree_add_item(section_tree, hf_st334_2_section_id, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000); |
| 1843 | if (seen_time) |
| 1844 | expert_add_info(pinfo, ti, &ei_st334_2_duplicate_section); |
| 1845 | seen_time = true1; |
| 1846 | |
| 1847 | b1 = tvb_get_uint8(tvb, offset + 1); |
| 1848 | b2 = tvb_get_uint8(tvb, offset + 2); |
| 1849 | b3 = tvb_get_uint8(tvb, offset + 3); |
| 1850 | b4 = tvb_get_uint8(tvb, offset + 4); |
| 1851 | |
| 1852 | hours = ((b1 >> 4) & 0x03) * 10 + (b1 & 0x0f); |
| 1853 | minutes = ((b2 >> 4) & 0x07) * 10 + (b2 & 0x0f); |
| 1854 | seconds = ((b3 >> 4) & 0x07) * 10 + (b3 & 0x0f); |
| 1855 | frames = ((b4 >> 4) & 0x03) * 10 + (b4 & 0x0f); |
| 1856 | snprintf(time_str, sizeof(time_str), "%02u:%02u:%02u:%02u", |
| 1857 | hours, minutes, seconds, frames); |
| 1858 | ti = proto_tree_add_string(section_tree, hf_st334_2_timecode, tvb, offset + 1, 4, time_str); |
| 1859 | proto_item_set_generated(ti); |
| 1860 | proto_tree_add_item(section_tree, hf_st334_2_tc_field_flag, tvb, offset + 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 1861 | proto_tree_add_item(section_tree, hf_st334_2_drop_frame_flag, tvb, offset + 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 1862 | } else if (id == 0x72) { |
| 1863 | /* SMPTE ST 334-2:2015, Sec. 5.4, Table 5 -- ccdata_section(). */ |
| 1864 | proto_tree *section_tree; |
| 1865 | unsigned count; |
| 1866 | unsigned expected; |
| 1867 | unsigned i; |
| 1868 | unsigned dtvcc_len = 0; |
| 1869 | uint8_t *dtvcc_data; |
| 1870 | |
| 1871 | if (!tvb_bytes_exist(tvb, offset, 2) || offset + 2 > parse_len) { |
| 1872 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 1873 | "Truncated CDP CC data section header"); |
| 1874 | break; |
| 1875 | } |
| 1876 | count = tvb_get_uint8(tvb, offset + 1) & 0x1f; |
| 1877 | section_len = 2 + 3 * count; |
| 1878 | if (!tvb_bytes_exist(tvb, offset, section_len) || offset + section_len > parse_len) { |
| 1879 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 1880 | "CC data section requires %u bytes but packet ends early", |
| 1881 | section_len); |
| 1882 | break; |
| 1883 | } |
| 1884 | |
| 1885 | section_tree = proto_tree_add_subtree(cdp_tree, tvb, offset, section_len, |
| 1886 | ett_st334_2_ccdata, NULL((void*)0), "CC Data Section"); |
| 1887 | ti = proto_tree_add_item(section_tree, hf_st334_2_section_id, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000); |
| 1888 | if (seen_cc) |
| 1889 | expert_add_info(pinfo, ti, &ei_st334_2_duplicate_section); |
| 1890 | seen_cc = true1; |
| 1891 | |
| 1892 | ti = proto_tree_add_item(section_tree, hf_st334_2_cc_count, tvb, offset + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1893 | if ((tvb_get_uint8(tvb, offset + 1) & 0xe0) != 0xe0) |
| 1894 | expert_add_info(pinfo, ti, &ei_st334_2_bad_marker); |
| 1895 | |
| 1896 | expected = st334_2_expected_cc_count(frame_rate); |
| 1897 | if (expected != 0 && count != expected) |
| 1898 | expert_add_info_format(pinfo, ti, &ei_st334_2_cc_count, |
| 1899 | "cc_count is %u; frame-rate code 0x%x requires %u", |
| 1900 | count, frame_rate, expected); |
| 1901 | |
| 1902 | dtvcc_data = wmem_alloc(pinfo->pool, MAX(1U, count * 2)(((1U) > (count * 2)) ? (1U) : (count * 2))); |
| 1903 | for (i = 0; i < count; i++) { |
| 1904 | unsigned c_off = offset + 2 + i * 3; |
| 1905 | uint8_t type_byte = tvb_get_uint8(tvb, c_off); |
| 1906 | uint8_t cc_type = type_byte & 0x03; |
| 1907 | proto_tree *construct_tree; |
| 1908 | |
| 1909 | construct_tree = proto_tree_add_subtree_format( |
| 1910 | section_tree, tvb, c_off, 3, ett_st334_2_cc_construct, NULL((void*)0), |
| 1911 | "CC Construct %u: %s", i + 1, |
| 1912 | val_to_str_const(cc_type, st334_2_cc_type_vals, "Unknown")); |
| 1913 | ti = proto_tree_add_item(construct_tree, hf_st334_2_cc_marker_bits, tvb, c_off, 1, ENC_BIG_ENDIAN0x00000000); |
| 1914 | if ((type_byte & 0xf8) != 0xf8) |
| 1915 | expert_add_info(pinfo, ti, &ei_st334_2_bad_marker); |
| 1916 | proto_tree_add_item(construct_tree, hf_st334_2_cc_valid, tvb, c_off, 1, ENC_BIG_ENDIAN0x00000000); |
| 1917 | proto_tree_add_item(construct_tree, hf_st334_2_cc_type, tvb, c_off, 1, ENC_BIG_ENDIAN0x00000000); |
| 1918 | proto_tree_add_item(construct_tree, hf_st334_2_cc_data_1, tvb, c_off + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1919 | proto_tree_add_item(construct_tree, hf_st334_2_cc_data_2, tvb, c_off + 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 1920 | |
| 1921 | if ((type_byte & 0x04) != 0 && (cc_type == 2 || cc_type == 3)) { |
| 1922 | dtvcc_data[dtvcc_len++] = tvb_get_uint8(tvb, c_off + 1); |
| 1923 | dtvcc_data[dtvcc_len++] = tvb_get_uint8(tvb, c_off + 2); |
| 1924 | } |
| 1925 | } |
| 1926 | if (dtvcc_len != 0) { |
| 1927 | tvbuff_t *dtvcc_tvb; |
| 1928 | |
| 1929 | dtvcc_tvb = tvb_new_child_real_data(tvb, dtvcc_data, |
| 1930 | dtvcc_len, dtvcc_len); |
| 1931 | /* ST 334-2:2015, Sec. 5.4, Table 5: concatenate valid cc_type 2/3 constructs for CEA-708 decoding. */ |
| 1932 | add_new_data_source(pinfo, dtvcc_tvb, "CEA-708 DTVCC Data"); |
| 1933 | ti = proto_tree_add_item(section_tree, hf_st334_2_dtvcc_data, |
| 1934 | dtvcc_tvb, 0, dtvcc_len, ENC_NA0x00000000); |
| 1935 | proto_item_set_generated(ti); |
| 1936 | } |
| 1937 | } else if (id == 0x73) { |
| 1938 | /* SMPTE ST 334-2:2015, Sec. 5.5, Table 6 -- ccsvcinfo_section(). */ |
| 1939 | proto_tree *section_tree; |
| 1940 | uint8_t svc_flags; |
| 1941 | unsigned count; |
| 1942 | unsigned i; |
| 1943 | |
| 1944 | if (!tvb_bytes_exist(tvb, offset, 2) || offset + 2 > parse_len) { |
| 1945 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 1946 | "Truncated CDP service information section header"); |
| 1947 | break; |
| 1948 | } |
| 1949 | svc_flags = tvb_get_uint8(tvb, offset + 1); |
| 1950 | count = svc_flags & 0x0f; |
| 1951 | section_len = 2 + 7 * count; |
| 1952 | if (!tvb_bytes_exist(tvb, offset, section_len) || offset + section_len > parse_len) { |
| 1953 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 1954 | "Service information section requires %u bytes but packet ends early", |
| 1955 | section_len); |
| 1956 | break; |
| 1957 | } |
| 1958 | |
| 1959 | section_tree = proto_tree_add_subtree(cdp_tree, tvb, offset, section_len, |
| 1960 | ett_st334_2_svcinfo, NULL((void*)0), |
| 1961 | "CC Service Information Section"); |
| 1962 | ti = proto_tree_add_item(section_tree, hf_st334_2_section_id, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000); |
| 1963 | if (seen_svc) |
| 1964 | expert_add_info(pinfo, ti, &ei_st334_2_duplicate_section); |
| 1965 | seen_svc = true1; |
| 1966 | |
| 1967 | ti = proto_tree_add_item(section_tree, hf_st334_2_svc_reserved, tvb, offset + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1968 | if ((svc_flags & 0x80) == 0) |
| 1969 | expert_add_info(pinfo, ti, &ei_st334_2_bad_reserved); |
| 1970 | proto_tree_add_item(section_tree, hf_st334_2_svc_info_start_section, tvb, offset + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1971 | proto_tree_add_item(section_tree, hf_st334_2_svc_info_change_section, tvb, offset + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1972 | proto_tree_add_item(section_tree, hf_st334_2_svc_info_complete_section, tvb, offset + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1973 | proto_tree_add_item(section_tree, hf_st334_2_svc_count, tvb, offset + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 1974 | |
| 1975 | if (((flags >> 2) & 0x07) != ((svc_flags >> 4) & 0x07)) { |
| 1976 | expert_add_info_format(pinfo, ti, &ei_st334_2_bad_reserved, |
| 1977 | "Service-info start/change/complete flags do not match CDP header"); |
| 1978 | } |
| 1979 | |
| 1980 | for (i = 0; i < count; i++) { |
| 1981 | unsigned s_off = offset + 2 + i * 7; |
| 1982 | uint8_t first = tvb_get_uint8(tvb, s_off); |
| 1983 | unsigned service_number; |
| 1984 | uint8_t type_byte; |
| 1985 | bool_Bool digital_cc; |
| 1986 | proto_tree *service_tree; |
| 1987 | proto_tree *data_tree; |
| 1988 | |
| 1989 | service_tree = proto_tree_add_subtree_format( |
| 1990 | section_tree, tvb, s_off, 7, ett_st334_2_service, NULL((void*)0), |
| 1991 | "Caption Service %u", i + 1); |
| 1992 | ti = proto_tree_add_item(service_tree, hf_st334_2_csn_reserved, tvb, s_off, 1, ENC_BIG_ENDIAN0x00000000); |
| 1993 | if ((first & 0x80) == 0) |
| 1994 | expert_add_info(pinfo, ti, &ei_st334_2_bad_reserved); |
| 1995 | proto_tree_add_item(service_tree, hf_st334_2_csn_size, tvb, s_off, 1, ENC_BIG_ENDIAN0x00000000); |
| 1996 | if ((first & 0x40) != 0) { |
| 1997 | ti = proto_tree_add_item(service_tree, hf_st334_2_csn_reserved_2, tvb, s_off, 1, ENC_BIG_ENDIAN0x00000000); |
| 1998 | if ((first & 0x20) == 0) |
| 1999 | expert_add_info(pinfo, ti, &ei_st334_2_bad_reserved); |
| 2000 | service_number = first & 0x1f; |
| 2001 | } else { |
| 2002 | service_number = first & 0x3f; |
| 2003 | } |
| 2004 | ti = proto_tree_add_uint(service_tree, hf_st334_2_caption_service_number, |
| 2005 | tvb, s_off, 1, service_number); |
| 2006 | |
| 2007 | /* |
| 2008 | * SMPTE ST 334-2:2015, Sec. 5.5, Table 6 defines |
| 2009 | * svc_data_byte_1 through svc_data_byte_6 as one service |
| 2010 | * entry encoded according to the caption service descriptor |
| 2011 | * loop in ATSC A/65:2013, Sec. 6.9.2, Table 6.26. |
| 2012 | */ |
| 2013 | type_byte = tvb_get_uint8(tvb, s_off + 4); |
| 2014 | digital_cc = (type_byte & 0x80) != 0; |
| 2015 | |
| 2016 | data_tree = proto_tree_add_subtree( |
| 2017 | service_tree, tvb, s_off + 1, 6, |
| 2018 | ett_st334_2_service_data, NULL((void*)0), "Service Data"); |
| 2019 | |
| 2020 | proto_tree_add_item(data_tree, hf_st334_2_service_language, |
| 2021 | tvb, s_off + 1, 3, ENC_ASCII0x00000000); |
| 2022 | proto_tree_add_item(data_tree, hf_st334_2_service_digital_cc, |
| 2023 | tvb, s_off + 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 2024 | |
| 2025 | if (digital_cc) { |
| 2026 | proto_tree_add_item(data_tree, hf_st334_2_service_digital_reserved, |
| 2027 | tvb, s_off + 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 2028 | proto_tree_add_item(data_tree, hf_st334_2_service_descriptor_number, |
| 2029 | tvb, s_off + 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 2030 | } else { |
| 2031 | proto_tree_add_item(data_tree, hf_st334_2_service_line21_reserved, |
| 2032 | tvb, s_off + 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 2033 | proto_tree_add_item(data_tree, hf_st334_2_service_line21_field, |
| 2034 | tvb, s_off + 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 2035 | } |
| 2036 | |
| 2037 | proto_tree_add_item(data_tree, hf_st334_2_service_easy_reader, |
| 2038 | tvb, s_off + 5, 1, ENC_BIG_ENDIAN0x00000000); |
| 2039 | proto_tree_add_item(data_tree, hf_st334_2_service_wide_aspect_ratio, |
| 2040 | tvb, s_off + 5, 1, ENC_BIG_ENDIAN0x00000000); |
| 2041 | ti = proto_tree_add_item(data_tree, hf_st334_2_service_reserved_14, |
| 2042 | tvb, s_off + 5, 2, ENC_BIG_ENDIAN0x00000000); |
| 2043 | if ((tvb_get_ntohs(tvb, s_off + 5) & 0x3fff) != 0x3fff) |
| 2044 | expert_add_info(pinfo, ti, &ei_st334_2_bad_reserved); |
| 2045 | } |
| 2046 | } else if (id == 0x74) { |
| 2047 | /* SMPTE ST 334-2:2015, Sec. 5.6, Table 7 -- cdp_footer(). */ |
| 2048 | proto_tree *section_tree; |
| 2049 | uint16_t footer_sequence; |
| 2050 | uint8_t sum; |
| 2051 | proto_item *checksum_item; |
| 2052 | |
| 2053 | section_len = 4; |
| 2054 | if (!tvb_bytes_exist(tvb, offset, section_len) || offset + section_len > parse_len) { |
| 2055 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 2056 | "Truncated CDP footer"); |
| 2057 | break; |
| 2058 | } |
| 2059 | |
| 2060 | section_tree = proto_tree_add_subtree(cdp_tree, tvb, offset, section_len, |
| 2061 | ett_st334_2_footer, NULL((void*)0), "CDP Footer"); |
| 2062 | ti = proto_tree_add_item(section_tree, hf_st334_2_section_id, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000); |
| 2063 | if (seen_footer) |
| 2064 | expert_add_info(pinfo, ti, &ei_st334_2_duplicate_section); |
| 2065 | seen_footer = true1; |
| 2066 | |
| 2067 | footer_sequence = tvb_get_ntohs(tvb, offset + 1); |
| 2068 | ti = proto_tree_add_item(section_tree, hf_st334_2_footer_sequence_counter, |
| 2069 | tvb, offset + 1, 2, ENC_BIG_ENDIAN0x00000000); |
| 2070 | if (footer_sequence != header_sequence) |
| 2071 | expert_add_info_format(pinfo, ti, &ei_st334_2_sequence_mismatch, |
| 2072 | "Footer sequence %u does not match header sequence %u", |
| 2073 | footer_sequence, header_sequence); |
| 2074 | |
| 2075 | checksum_item = proto_tree_add_item(section_tree, hf_st334_2_packet_checksum, |
| 2076 | tvb, offset + 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 2077 | if (parse_len == declared_len && offset + 4 == parse_len) { |
| 2078 | sum = st334_2_cdp_checksum(tvb, parse_len); |
| 2079 | ti = proto_tree_add_uint(section_tree, hf_st334_2_checksum_calculated, |
| 2080 | tvb, 0, 0, |
| 2081 | (uint8_t)(tvb_get_uint8(tvb, offset + 3) - sum)); |
| 2082 | proto_item_set_generated(ti); |
| 2083 | if (sum != 0) |
| 2084 | expert_add_info_format(pinfo, checksum_item, &ei_st334_2_bad_checksum, |
| 2085 | "CDP checksum does not make packet sum modulo 256 equal zero (sum 0x%02x)", |
| 2086 | sum); |
| 2087 | } |
| 2088 | offset += section_len; |
Value stored to 'offset' is never read | |
| 2089 | break; |
| 2090 | } else if (id >= 0x75 && id <= 0xef) { |
| 2091 | /* SMPTE ST 334-2:2015, Sec. 5.7, Table 8 -- future_section(). */ |
| 2092 | proto_tree *section_tree; |
| 2093 | unsigned future_len; |
| 2094 | |
| 2095 | if (!tvb_bytes_exist(tvb, offset, 2) || offset + 2 > parse_len) { |
| 2096 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 2097 | "Truncated future CDP section header"); |
| 2098 | break; |
| 2099 | } |
| 2100 | future_len = tvb_get_uint8(tvb, offset + 1); |
| 2101 | section_len = 2 + future_len; |
| 2102 | if (!tvb_bytes_exist(tvb, offset, section_len) || offset + section_len > parse_len) { |
| 2103 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_truncated, |
| 2104 | "Future CDP section requires %u bytes but packet ends early", |
| 2105 | section_len); |
| 2106 | break; |
| 2107 | } |
| 2108 | section_tree = proto_tree_add_subtree_format( |
| 2109 | cdp_tree, tvb, offset, section_len, ett_st334_2_future, NULL((void*)0), |
| 2110 | "Unknown/Future CDP Section 0x%02x", id); |
| 2111 | proto_tree_add_item(section_tree, hf_st334_2_section_id, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000); |
| 2112 | proto_tree_add_item(section_tree, hf_st334_2_future_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 2113 | if (future_len != 0) |
| 2114 | proto_tree_add_item(section_tree, hf_st334_2_future_data, tvb, offset + 2, |
| 2115 | future_len, ENC_NA0x00000000); |
| 2116 | } else { |
| 2117 | ti = proto_tree_add_item(cdp_tree, hf_st334_2_section_id, tvb, offset, 1, ENC_BIG_ENDIAN0x00000000); |
| 2118 | expert_add_info_format(pinfo, ti, &ei_st334_2_bad_section_order, |
| 2119 | "Unknown CDP section identifier 0x%02x cannot be safely skipped", |
| 2120 | id); |
| 2121 | break; |
| 2122 | } |
| 2123 | |
| 2124 | offset += section_len; |
| 2125 | } |
| 2126 | |
| 2127 | if (time_present != seen_time) |
| 2128 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_missing_section, |
| 2129 | "CDP header time_code_present=%u but time-code section %s", |
| 2130 | time_present, seen_time ? "is present" : "is absent"); |
| 2131 | if (cc_present != seen_cc) |
| 2132 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_missing_section, |
| 2133 | "CDP header ccdata_present=%u but CC-data section %s", |
| 2134 | cc_present, seen_cc ? "is present" : "is absent"); |
| 2135 | if (svc_present != seen_svc) |
| 2136 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_missing_section, |
| 2137 | "CDP header svcinfo_present=%u but service-info section %s", |
| 2138 | svc_present, seen_svc ? "is present" : "is absent"); |
| 2139 | if (!seen_footer) |
| 2140 | expert_add_info_format(pinfo, root_ti, &ei_st334_2_missing_section, |
| 2141 | "Required CDP footer is absent"); |
| 2142 | |
| 2143 | return captured_len; |
| 2144 | } |
| 2145 | |
| 2146 | void |
| 2147 | proto_register_st334_2(void) |
| 2148 | { |
| 2149 | static hf_register_info hf[] = { |
| 2150 | { &hf_st334_2_cdp_identifier, |
| 2151 | { "CDP Identifier", "st334_2.cdp.identifier", FT_UINT16, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), |
| 2152 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2153 | { &hf_st334_2_cdp_length, |
| 2154 | { "CDP Length", "st334_2.cdp.length", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2155 | { &hf_st334_2_frame_rate, |
| 2156 | { "CDP Frame Rate", "st334_2.cdp.frame_rate", FT_UINT8, BASE_HEX, |
| 2157 | VALS(st334_2_frame_rate_vals)((0 ? (const struct _value_string*)0 : ((st334_2_frame_rate_vals )))), 0xf0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2158 | { &hf_st334_2_header_reserved, |
| 2159 | { "Reserved", "st334_2.cdp.header.reserved", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0f, NULL((void*)0), |
| 2160 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2161 | { &hf_st334_2_time_code_present, |
| 2162 | { "Time Code", "st334_2.cdp.time_code_present", FT_BOOLEAN, 8, |
| 2163 | TFS(&st334_2_tfs_present)((0 ? (const struct true_false_string*)0 : ((&st334_2_tfs_present )))), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2164 | { &hf_st334_2_ccdata_present, |
| 2165 | { "CC Data", "st334_2.cdp.ccdata_present", FT_BOOLEAN, 8, TFS(&st334_2_tfs_present)((0 ? (const struct true_false_string*)0 : ((&st334_2_tfs_present )))), |
| 2166 | 0x40, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2167 | { &hf_st334_2_svcinfo_present, |
| 2168 | { "Service Information", "st334_2.cdp.svcinfo_present", FT_BOOLEAN, 8, |
| 2169 | TFS(&st334_2_tfs_present)((0 ? (const struct true_false_string*)0 : ((&st334_2_tfs_present )))), 0x20, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2170 | { &hf_st334_2_svc_info_start, |
| 2171 | { "Service Info Start", "st334_2.cdp.svc_info_start", FT_BOOLEAN, 8, NULL((void*)0), 0x10, |
| 2172 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2173 | { &hf_st334_2_svc_info_change, |
| 2174 | { "Service Info Change", "st334_2.cdp.svc_info_change", FT_BOOLEAN, 8, NULL((void*)0), 0x08, |
| 2175 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2176 | { &hf_st334_2_svc_info_complete, |
| 2177 | { "Service Info Complete", "st334_2.cdp.svc_info_complete", FT_BOOLEAN, 8, NULL((void*)0), |
| 2178 | 0x04, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2179 | { &hf_st334_2_caption_service_active, |
| 2180 | { "Caption Service Active", "st334_2.cdp.caption_service_active", FT_BOOLEAN, 8, |
| 2181 | NULL((void*)0), 0x02, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2182 | { &hf_st334_2_header_reserved_bit, |
| 2183 | { "Reserved", "st334_2.cdp.header.reserved_bit", FT_BOOLEAN, 8, NULL((void*)0), 0x01, NULL((void*)0), |
| 2184 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2185 | { &hf_st334_2_header_sequence_counter, |
| 2186 | { "Header Sequence Counter", "st334_2.cdp.header_sequence", FT_UINT16, BASE_DEC, |
| 2187 | NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2188 | { &hf_st334_2_section_id, |
| 2189 | { "Section ID", "st334_2.section.id", FT_UINT8, BASE_HEX, |
| 2190 | VALS(st334_2_section_id_vals)((0 ? (const struct _value_string*)0 : ((st334_2_section_id_vals )))), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2191 | { &hf_st334_2_timecode, |
| 2192 | { "Time Code", "st334_2.timecode", FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2193 | { &hf_st334_2_tc_field_flag, |
| 2194 | { "Field Flag", "st334_2.timecode.field_flag", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), |
| 2195 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2196 | { &hf_st334_2_drop_frame_flag, |
| 2197 | { "Drop Frame", "st334_2.timecode.drop_frame", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), |
| 2198 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2199 | { &hf_st334_2_cc_count, |
| 2200 | { "CC Count", "st334_2.ccdata.count", FT_UINT8, BASE_DEC, NULL((void*)0), 0x1f, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2201 | { &hf_st334_2_cc_marker_bits, |
| 2202 | { "Marker Bits", "st334_2.ccdata.marker", FT_UINT8, BASE_HEX, NULL((void*)0), 0xf8, NULL((void*)0), |
| 2203 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2204 | { &hf_st334_2_cc_valid, |
| 2205 | { "CC Valid", "st334_2.ccdata.valid", FT_BOOLEAN, 8, TFS(&st334_2_tfs_valid)((0 ? (const struct true_false_string*)0 : ((&st334_2_tfs_valid )))), 0x04, |
| 2206 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2207 | { &hf_st334_2_cc_type, |
| 2208 | { "CC Type", "st334_2.ccdata.type", FT_UINT8, BASE_DEC, VALS(st334_2_cc_type_vals)((0 ? (const struct _value_string*)0 : ((st334_2_cc_type_vals )))), |
| 2209 | 0x03, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2210 | { &hf_st334_2_cc_data_1, |
| 2211 | { "CC Data 1", "st334_2.ccdata.data1", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2212 | { &hf_st334_2_cc_data_2, |
| 2213 | { "CC Data 2", "st334_2.ccdata.data2", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2214 | { &hf_st334_2_dtvcc_data, |
| 2215 | { "DTVCC Data", "st334_2.ccdata.dtvcc", FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2216 | { &hf_st334_2_svc_reserved, |
| 2217 | { "Reserved", "st334_2.svcinfo.reserved", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2218 | { &hf_st334_2_svc_info_start_section, |
| 2219 | { "Service Info Start", "st334_2.svcinfo.start", FT_BOOLEAN, 8, NULL((void*)0), 0x40, NULL((void*)0), |
| 2220 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2221 | { &hf_st334_2_svc_info_change_section, |
| 2222 | { "Service Info Change", "st334_2.svcinfo.change", FT_BOOLEAN, 8, NULL((void*)0), 0x20, NULL((void*)0), |
| 2223 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2224 | { &hf_st334_2_svc_info_complete_section, |
| 2225 | { "Service Info Complete", "st334_2.svcinfo.complete", FT_BOOLEAN, 8, NULL((void*)0), 0x10, |
| 2226 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2227 | { &hf_st334_2_svc_count, |
| 2228 | { "Service Count", "st334_2.svcinfo.count", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0f, NULL((void*)0), |
| 2229 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2230 | { &hf_st334_2_csn_reserved, |
| 2231 | { "Reserved", "st334_2.svcinfo.service.reserved", FT_BOOLEAN, 8, NULL((void*)0), 0x80, NULL((void*)0), |
| 2232 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2233 | { &hf_st334_2_csn_size, |
| 2234 | { "Caption Service Number Size", "st334_2.svcinfo.service.csn_size", FT_BOOLEAN, 8, |
| 2235 | NULL((void*)0), 0x40, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2236 | { &hf_st334_2_csn_reserved_2, |
| 2237 | { "Reserved", "st334_2.svcinfo.service.reserved_2", FT_BOOLEAN, 8, NULL((void*)0), 0x20, NULL((void*)0), |
| 2238 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2239 | { &hf_st334_2_caption_service_number, |
| 2240 | { "Caption Service Number", "st334_2.svcinfo.service.number", FT_UINT8, BASE_DEC, |
| 2241 | NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2242 | |
| 2243 | /* |
| 2244 | * SMPTE ST 334-2:2015, Sec. 5.5, Table 6; |
| 2245 | * ATSC A/65:2013, Sec. 6.9.2, Table 6.26. |
| 2246 | */ |
| 2247 | { &hf_st334_2_service_data, |
| 2248 | { "Service Data", "st334_2.svcinfo.service.data", FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, |
| 2249 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2250 | { &hf_st334_2_service_language, |
| 2251 | { "Language", "st334_2.svcinfo.service.language", FT_STRING, BASE_NONE, NULL((void*)0), 0x0, |
| 2252 | "ISO 639.2/B language code", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2253 | { &hf_st334_2_service_digital_cc, |
| 2254 | { "Digital CC", "st334_2.svcinfo.service.digital_cc", FT_BOOLEAN, 8, |
| 2255 | TFS(&tfs_yes_no)((0 ? (const struct true_false_string*)0 : ((&tfs_yes_no) ))), 0x80, "1 = CEA-708 digital captions; 0 = CEA-608/line 21", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2256 | { &hf_st334_2_service_digital_reserved, |
| 2257 | { "Reserved", "st334_2.svcinfo.service.digital_reserved", FT_BOOLEAN, 8, NULL((void*)0), 0x40, |
| 2258 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2259 | { &hf_st334_2_service_line21_reserved, |
| 2260 | { "Reserved", "st334_2.svcinfo.service.line21_reserved", FT_UINT8, BASE_HEX, NULL((void*)0), |
| 2261 | 0x7e, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2262 | { &hf_st334_2_service_line21_field, |
| 2263 | { "Line 21 Field", "st334_2.svcinfo.service.line21_field", FT_BOOLEAN, 8, NULL((void*)0), |
| 2264 | 0x01, "0 = field 1; 1 = field 2", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2265 | { &hf_st334_2_service_descriptor_number, |
| 2266 | { "Caption Service Number", "st334_2.svcinfo.service.descriptor_number", FT_UINT8, |
| 2267 | BASE_DEC, NULL((void*)0), 0x3f, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2268 | { &hf_st334_2_service_easy_reader, |
| 2269 | { "Easy Reader", "st334_2.svcinfo.service.easy_reader", FT_BOOLEAN, 8, |
| 2270 | TFS(&tfs_yes_no)((0 ? (const struct true_false_string*)0 : ((&tfs_yes_no) ))), 0x80, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2271 | { &hf_st334_2_service_wide_aspect_ratio, |
| 2272 | { "Wide Aspect Ratio", "st334_2.svcinfo.service.wide_aspect_ratio", FT_BOOLEAN, 8, |
| 2273 | TFS(&tfs_yes_no)((0 ? (const struct true_false_string*)0 : ((&tfs_yes_no) ))), 0x40, "1 = 16:9; 0 = 4:3", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2274 | { &hf_st334_2_service_reserved_14, |
| 2275 | { "Reserved", "st334_2.svcinfo.service.reserved_14", FT_UINT16, BASE_HEX, NULL((void*)0), |
| 2276 | 0x3fff, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2277 | { &hf_st334_2_future_length, |
| 2278 | { "Length", "st334_2.future.length", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2279 | { &hf_st334_2_future_data, |
| 2280 | { "Data", "st334_2.future.data", FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2281 | { &hf_st334_2_footer_sequence_counter, |
| 2282 | { "Footer Sequence Counter", "st334_2.cdp.footer_sequence", FT_UINT16, BASE_DEC, |
| 2283 | NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2284 | { &hf_st334_2_packet_checksum, |
| 2285 | { "Packet Checksum", "st334_2.cdp.checksum", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), |
| 2286 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2287 | { &hf_st334_2_checksum_calculated, |
| 2288 | { "Calculated Checksum", "st334_2.cdp.checksum_calculated", FT_UINT8, BASE_HEX, |
| 2289 | NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2290 | }; |
| 2291 | static int *ett[] = { |
| 2292 | &ett_st334_2, |
| 2293 | &ett_st334_2_header, |
| 2294 | &ett_st334_2_timecode, |
| 2295 | &ett_st334_2_ccdata, |
| 2296 | &ett_st334_2_cc_construct, |
| 2297 | &ett_st334_2_svcinfo, |
| 2298 | &ett_st334_2_service, |
| 2299 | &ett_st334_2_service_data, |
| 2300 | &ett_st334_2_future, |
| 2301 | &ett_st334_2_footer, |
| 2302 | }; |
| 2303 | static ei_register_info ei[] = { |
| 2304 | { &ei_st334_2_bad_identifier, { "st334_2.bad_identifier", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid CDP identifier", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2305 | { &ei_st334_2_bad_length, { "st334_2.bad_length", PI_MALFORMED0x07000000, PI_WARN0x00600000, "CDP length mismatch", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2306 | { &ei_st334_2_bad_reserved, { "st334_2.bad_reserved", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid reserved bits or duplicated flags", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2307 | { &ei_st334_2_bad_section_order, { "st334_2.bad_section_order", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid or unknown CDP section ordering", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2308 | { &ei_st334_2_duplicate_section, { "st334_2.duplicate_section", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Duplicate CDP section", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2309 | { &ei_st334_2_missing_section, { "st334_2.missing_section", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "CDP section presence mismatch", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2310 | { &ei_st334_2_cc_count, { "st334_2.bad_cc_count", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "CC count does not match frame rate", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2311 | { &ei_st334_2_bad_marker, { "st334_2.bad_marker", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid CEA-708 marker bits", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2312 | { &ei_st334_2_sequence_mismatch, { "st334_2.sequence_mismatch", PI_SEQUENCE0x02000000, PI_WARN0x00600000, "CDP header/footer sequence mismatch", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2313 | { &ei_st334_2_bad_checksum, { "st334_2.bad_checksum", PI_CHECKSUM0x01000000, PI_WARN0x00600000, "Invalid CDP checksum", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2314 | { &ei_st334_2_truncated, { "st334_2.truncated", PI_MALFORMED0x07000000, PI_ERROR0x00800000, "Truncated CDP section", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} } }, |
| 2315 | }; |
| 2316 | expert_module_t *expert_st334_2; |
| 2317 | |
| 2318 | proto_st334_2 = proto_register_protocol( |
| 2319 | "SMPTE ST 334-2 Caption Distribution Packet", "ST 334-2", "st334_2"); |
| 2320 | proto_register_field_array(proto_st334_2, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0])); |
| 2321 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0])); |
| 2322 | |
| 2323 | expert_st334_2 = expert_register_protocol(proto_st334_2); |
| 2324 | expert_register_field_array(expert_st334_2, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0])); |
| 2325 | |
| 2326 | st334_2_handle = register_dissector("st334_2", dissect_st334_2, proto_st334_2); |
| 2327 | } |
| 2328 | |
| 2329 | void |
| 2330 | proto_reg_handoff_st334_2(void) |
| 2331 | { |
| 2332 | dissector_add_uint("st291.did_sdid", ST334_2_DID_SDID_KEY0x6101, st334_2_handle); |
| 2333 | } |
| 2334 | |
| 2335 | /* |
| 2336 | * Common System B World System Teletext decoding used by ST 2031 and |
| 2337 | * RDD 8 / OP-47. The protocols retain separate display-filter fields; this |
| 2338 | * structure supplies the appropriate field IDs to the common parser. |
| 2339 | */ |
| 2340 | typedef struct { |
| 2341 | int *magazine_hamming; |
| 2342 | int *magazine; |
| 2343 | int *packet_number_hamming; |
| 2344 | int *packet_number; |
| 2345 | int *page_units_hamming; |
| 2346 | int *page_units; |
| 2347 | int *page_tens_hamming; |
| 2348 | int *page_tens; |
| 2349 | int *data_string; |
| 2350 | int *textdata_array; |
| 2351 | int *erase_page; |
| 2352 | int *newsflash; |
| 2353 | int *subtitle; |
| 2354 | int *suppress_header; |
| 2355 | int *update_indicator; |
| 2356 | int *interrupted_sequence; |
| 2357 | int *inhibit_display; |
| 2358 | int *magazine_serial; |
| 2359 | int *character_set; |
| 2360 | int *tt_control; |
| 2361 | } st291_wst_fields_t; |
| 2362 | |
| 2363 | /* Rec. ITU-R BT.653-3, System B national-option character subsets. */ |
| 2364 | static const value_string st291_wst_national_subset_vals[] = { |
| 2365 | { 0x00, "English" }, |
| 2366 | { 0x01, "German" }, |
| 2367 | { 0x04, "Swedish/Finnish/Hungarian" }, |
| 2368 | { 0x05, "Italian" }, |
| 2369 | { 0x10, "French" }, |
| 2370 | { 0x11, "Portuguese/Spanish" }, |
| 2371 | { 0x14, "Czech/Slovak" }, |
| 2372 | { 0, NULL((void*)0) } |
| 2373 | }; |
| 2374 | |
| 2375 | static void |
| 2376 | st291_process_wst_packet(tvbuff_t *tvb, proto_tree *tree, const st291_wst_fields_t *fields) |
| 2377 | { |
| 2378 | uint8_t text_data[40]; |
| 2379 | char data_string[41]; |
| 2380 | unsigned magazine, packet_number; |
| 2381 | unsigned data_start_offset = 0, number_of_data_bytes = 0; |
| 2382 | proto_item *ti; |
| 2383 | unsigned i; |
| 2384 | |
| 2385 | if (tvb_captured_length(tvb) < 42) |
| 2386 | return; |
| 2387 | |
| 2388 | proto_tree_add_item(tree, *fields->magazine_hamming, tvb, 0, 2, ENC_BIG_ENDIAN0x00000000); |
| 2389 | magazine = tvb_get_bits8(tvb, 1, 1) |
| 2390 | + 2 * tvb_get_bits8(tvb, 3, 1) |
| 2391 | + 4 * tvb_get_bits8(tvb, 5, 1); |
| 2392 | if (magazine == 0) |
| 2393 | magazine = 8; |
| 2394 | ti = proto_tree_add_uint(tree, *fields->magazine, tvb, 0, 0, magazine); |
| 2395 | proto_item_set_generated(ti); |
| 2396 | |
| 2397 | proto_tree_add_item(tree, *fields->packet_number_hamming, tvb, 0, 2, ENC_BIG_ENDIAN0x00000000); |
| 2398 | packet_number = tvb_get_bits8(tvb, 7, 1) |
| 2399 | + 2 * tvb_get_bits8(tvb, 9, 1) |
| 2400 | + 4 * tvb_get_bits8(tvb, 11, 1) |
| 2401 | + 8 * tvb_get_bits8(tvb, 13, 1) |
| 2402 | + 16 * tvb_get_bits8(tvb, 15, 1); |
| 2403 | ti = proto_tree_add_uint(tree, *fields->packet_number, tvb, 0, 0, packet_number); |
| 2404 | proto_item_set_generated(ti); |
| 2405 | |
| 2406 | if (packet_number == 0) { |
| 2407 | unsigned page_units, page_tens, tt_page; |
| 2408 | |
| 2409 | data_start_offset = 10; |
| 2410 | number_of_data_bytes = 32; |
| 2411 | |
| 2412 | page_units = tvb_get_bits8(tvb, 2 * 8 + 1, 1) |
| 2413 | + 2 * tvb_get_bits8(tvb, 2 * 8 + 3, 1) |
| 2414 | + 4 * tvb_get_bits8(tvb, 2 * 8 + 5, 1) |
| 2415 | + 8 * tvb_get_bits8(tvb, 2 * 8 + 7, 1); |
| 2416 | page_tens = tvb_get_bits8(tvb, 3 * 8 + 1, 1) |
| 2417 | + 2 * tvb_get_bits8(tvb, 3 * 8 + 3, 1) |
| 2418 | + 4 * tvb_get_bits8(tvb, 3 * 8 + 5, 1) |
| 2419 | + 8 * tvb_get_bits8(tvb, 3 * 8 + 7, 1); |
| 2420 | |
| 2421 | proto_tree_add_item(tree, *fields->page_units_hamming, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 2422 | proto_tree_add_item(tree, *fields->page_tens_hamming, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 2423 | ti = proto_tree_add_uint(tree, *fields->page_units, tvb, 0, 0, page_units); |
| 2424 | proto_item_set_generated(ti); |
| 2425 | ti = proto_tree_add_uint(tree, *fields->page_tens, tvb, 0, 0, page_tens); |
| 2426 | proto_item_set_generated(ti); |
| 2427 | |
| 2428 | tt_page = (magazine << 8) | (page_tens << 4) | page_units; |
| 2429 | proto_tree_add_none_format(tree, *fields->tt_control, tvb, 0, 0, |
| 2430 | "Control bits for TT Page 0x%x:", tt_page); |
| 2431 | |
| 2432 | proto_tree_add_item(tree, *fields->erase_page, tvb, 5, 1, ENC_BIG_ENDIAN0x00000000); |
| 2433 | proto_tree_add_item(tree, *fields->newsflash, tvb, 7, 1, ENC_BIG_ENDIAN0x00000000); |
| 2434 | proto_tree_add_item(tree, *fields->subtitle, tvb, 7, 1, ENC_BIG_ENDIAN0x00000000); |
| 2435 | proto_tree_add_item(tree, *fields->suppress_header, tvb, 8, 1, ENC_BIG_ENDIAN0x00000000); |
| 2436 | proto_tree_add_item(tree, *fields->update_indicator, tvb, 8, 1, ENC_BIG_ENDIAN0x00000000); |
| 2437 | proto_tree_add_item(tree, *fields->interrupted_sequence, tvb, 8, 1, ENC_BIG_ENDIAN0x00000000); |
| 2438 | proto_tree_add_item(tree, *fields->inhibit_display, tvb, 8, 1, ENC_BIG_ENDIAN0x00000000); |
| 2439 | proto_tree_add_item(tree, *fields->magazine_serial, tvb, 9, 1, ENC_BIG_ENDIAN0x00000000); |
| 2440 | proto_tree_add_item(tree, *fields->character_set, tvb, 9, 1, ENC_BIG_ENDIAN0x00000000); |
| 2441 | } else if (packet_number >= 1 && packet_number <= 25) { |
| 2442 | data_start_offset = 2; |
| 2443 | number_of_data_bytes = 40; |
| 2444 | } |
| 2445 | |
| 2446 | if (number_of_data_bytes == 0) |
| 2447 | return; |
| 2448 | |
| 2449 | for (i = 0; i < number_of_data_bytes; i++) { |
| 2450 | uint8_t c = tvb_get_bits8(tvb, (data_start_offset + i) * 8, 7); |
| 2451 | text_data[i] = c; |
| 2452 | data_string[i] = (char)c; |
| 2453 | } |
| 2454 | data_string[number_of_data_bytes] = '\0'; |
| 2455 | |
| 2456 | ti = proto_tree_add_string(tree, *fields->data_string, tvb, 0, 0, data_string); |
| 2457 | proto_item_set_generated(ti); |
| 2458 | ti = proto_tree_add_bytes(tree, *fields->textdata_array, tvb, 0, 0, text_data); |
| 2459 | proto_item_set_generated(ti); |
| 2460 | } |
| 2461 | |
| 2462 | /* |
| 2463 | * SMPTE ST 2031 DVB/SCTE VBI data in VANC |
| 2464 | */ |
| 2465 | |
| 2466 | static const struct true_false_string st2031_tfs_field_parity = { |
| 2467 | "First field of a frame", "Second field of a frame" |
| 2468 | }; |
| 2469 | |
| 2470 | |
| 2471 | static const st291_wst_fields_t st2031_wst_fields = { |
| 2472 | &hf_st2031_magazine_hamming, |
| 2473 | &hf_st2031_magazine, |
| 2474 | &hf_st2031_packet_number_hamming, |
| 2475 | &hf_st2031_packet_number, |
| 2476 | &hf_st2031_page_units_hamming, |
| 2477 | &hf_st2031_page_units, |
| 2478 | &hf_st2031_page_tens_hamming, |
| 2479 | &hf_st2031_page_tens, |
| 2480 | &hf_st2031_data_string, |
| 2481 | &hf_st2031_textdata_array, |
| 2482 | &hf_st2031_erase_page, |
| 2483 | &hf_st2031_newsflash, |
| 2484 | &hf_st2031_subtitle, |
| 2485 | &hf_st2031_suppress_header, |
| 2486 | &hf_st2031_update_indicator, |
| 2487 | &hf_st2031_interrupted_sequence, |
| 2488 | &hf_st2031_inhibit_display, |
| 2489 | &hf_st2031_magazine_serial, |
| 2490 | &hf_st2031_character_set, |
| 2491 | &hf_st2031_tt_control, |
| 2492 | }; |
| 2493 | |
| 2494 | /* Rec. ITU-R BT.653-3, System B national-option character subsets used by Teletext data units. */ |
| 2495 | /* SMPTE ST 2031:2015, Sec. 6, Table 2; values originate in ETSI EN 301 775, Sec. 4.4. */ |
| 2496 | static const range_string st2031_data_identifier_vals[] = { |
| 2497 | { 0x10, 0x1F, "EBU Teletext/VPS/WSS/CC/VBI sample data" }, |
| 2498 | { 0x80, 0x98, "User defined" }, |
| 2499 | { 0x99, 0x9B, "EBU Teletext/VPS/WSS/CC/VBI sample data" }, |
| 2500 | { 0x9C, 0xFF, "User defined" }, |
| 2501 | { 0x00, 0xFF, "Reserved for future use" }, |
| 2502 | { 0, 0, NULL((void*)0) } |
| 2503 | }; |
| 2504 | |
| 2505 | /* SMPTE ST 2031:2015, Sec. 6, Table 2; data_unit_id values originate in ETSI EN 301 775, Sec. 4.5. */ |
| 2506 | static const range_string st2031_data_unit_id_vals[] = { |
| 2507 | { 0x00, 0x01, "DVB reserved" }, |
| 2508 | { 0x02, 0x02, "EBU Teletext non-subtitle data" }, |
| 2509 | { 0x03, 0x03, "EBU Teletext subtitle data" }, |
| 2510 | { 0x04, 0x7F, "DVB reserved" }, |
| 2511 | { 0x80, 0xBF, "User defined" }, |
| 2512 | { 0xC0, 0xC0, "Inverted Teletext" }, |
| 2513 | { 0xC1, 0xC2, "DVB reserved" }, |
| 2514 | { 0xC3, 0xC3, "VPS" }, |
| 2515 | { 0xC4, 0xC4, "WSS" }, |
| 2516 | { 0xC5, 0xC5, "CEA-608 Closed Captioning" }, |
| 2517 | { 0xC6, 0xC6, "monochrome 4:2:2 samples" }, |
| 2518 | { 0xC7, 0xCF, "User defined" }, |
| 2519 | { 0xD0, 0xD0, "AMOL48" }, |
| 2520 | { 0xD1, 0xD1, "AMOL96" }, |
| 2521 | { 0xDA, 0xE5, "SCTE reserved" }, |
| 2522 | { 0xE6, 0xFE, "SCTE user defined" }, |
| 2523 | { 0xFF, 0xFF, "MPEG stuffing" }, |
| 2524 | { 0x00, 0xFF, "Reserved or user defined" }, |
| 2525 | { 0, 0, NULL((void*)0) } |
| 2526 | }; |
| 2527 | |
| 2528 | /* ETSI EN 301 775, Sec. 4.5.2 carries a 42-byte Teletext data block; |
| 2529 | * packet addressing, page/control bits and character data follow Rec. ITU-R BT.653-3 System B. */ |
| 2530 | /* SMPTE ST 2031:2015, Secs. 5-6, Tables 1-2; ETSI EN 301 775 Sec. 4.5 for Teletext fields. */ |
| 2531 | static int |
| 2532 | dissect_st2031(tvbuff_t *tvb, packet_info *pinfo _U___attribute__((unused)), proto_tree *tree, void *data) |
| 2533 | { |
| 2534 | const st291_vanc_dissector_data_t *st291_data = (const st291_vanc_dissector_data_t *)data; |
| 2535 | proto_tree *top_tree = st291_data && st291_data->top_tree ? st291_data->top_tree : tree; |
| 2536 | proto_item *ti; |
| 2537 | proto_tree *st2031_tree; |
| 2538 | uint8_t unit_id; |
| 2539 | tvbuff_t *wst_tvb; |
| 2540 | |
| 2541 | if (tvb_captured_length(tvb) < 2) |
| 2542 | return 0; |
| 2543 | |
| 2544 | ti = proto_tree_add_item(top_tree, proto_st2031, tvb, 0, -1, ENC_NA0x00000000); |
| 2545 | st2031_tree = proto_item_add_subtree(ti, ett_st2031); |
| 2546 | |
| 2547 | /* SMPTE ST 2031:2015, Sec. 6, Table 2 -- data_identifier, |
| 2548 | * data_unit_id and data_unit_length. */ |
| 2549 | proto_tree_add_item(st2031_tree, hf_st2031_data_identifier, tvb, 0, 1, ENC_BIG_ENDIAN0x00000000); |
| 2550 | proto_tree_add_item(st2031_tree, hf_st2031_data_unit_id, tvb, 1, 1, ENC_BIG_ENDIAN0x00000000); |
| 2551 | unit_id = tvb_get_uint8(tvb, 1); |
| 2552 | |
| 2553 | if ((unit_id == 0x02 || unit_id == 0x03) && tvb_captured_length(tvb) >= 47) { |
| 2554 | proto_tree_add_item(st2031_tree, hf_st2031_data_unit_length, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 2555 | /* ETSI EN 301 775, Secs. 4.5.1-4.5.2, Tables 4-5 -- |
| 2556 | * field_parity, line_offset, framing_code and Teletext data block. */ |
| 2557 | proto_tree_add_item(st2031_tree, hf_st2031_field_parity, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 2558 | proto_tree_add_item(st2031_tree, hf_st2031_line_offset, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 2559 | proto_tree_add_item(st2031_tree, hf_st2031_framing_code, tvb, 4, 1, ENC_BIG_ENDIAN0x00000000); |
| 2560 | wst_tvb = tvb_new_subset_length(tvb, 5, 42); |
| 2561 | st291_process_wst_packet(wst_tvb, st2031_tree, &st2031_wst_fields); |
| 2562 | } |
| 2563 | |
| 2564 | return tvb_captured_length(tvb); |
| 2565 | } |
| 2566 | |
| 2567 | void |
| 2568 | proto_register_st2031(void) |
| 2569 | { |
| 2570 | static hf_register_info hf[] = { |
| 2571 | { &hf_st2031_data_identifier, |
| 2572 | { "Data Identifier", "st2031.data_identifier", FT_UINT8, |
| 2573 | BASE_HEX | BASE_RANGE_STRING0x00000100, RVALS(st2031_data_identifier_vals)((0 ? (const struct _range_string*)0 : ((st2031_data_identifier_vals )))), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2574 | { &hf_st2031_data_unit_id, |
| 2575 | { "Data Unit ID", "st2031.data_unit_id", FT_UINT8, BASE_HEX | BASE_RANGE_STRING0x00000100, |
| 2576 | RVALS(st2031_data_unit_id_vals)((0 ? (const struct _range_string*)0 : ((st2031_data_unit_id_vals )))), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2577 | { &hf_st2031_data_unit_length, |
| 2578 | { "Data Unit Length", "st2031.data_unit_length", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, |
| 2579 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2580 | { &hf_st2031_field_parity, |
| 2581 | { "Field Parity", "st2031.field_parity", FT_BOOLEAN, 8, |
| 2582 | TFS(&st2031_tfs_field_parity)((0 ? (const struct true_false_string*)0 : ((&st2031_tfs_field_parity )))), 0x20, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2583 | { &hf_st2031_line_offset, |
| 2584 | { "Line Offset", "st2031.line_offset", FT_UINT8, BASE_DEC, NULL((void*)0), 0x1F, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2585 | { &hf_st2031_framing_code, |
| 2586 | { "Framing Code", "st2031.framing_code", FT_UINT8, BASE_HEX, NULL((void*)0), 0xFF, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2587 | { &hf_st2031_magazine_hamming, |
| 2588 | { "Magazine (Hamming 8/4)", "st2031.teletext.magazine_hamming", FT_UINT16, BASE_DEC, |
| 2589 | NULL((void*)0), 0xFC00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2590 | { &hf_st2031_magazine, |
| 2591 | { "Magazine", "st2031.teletext.magazine", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2592 | { &hf_st2031_packet_number_hamming, |
| 2593 | { "Packet Number (Hamming 8/4)", "st2031.teletext.packet_number_hamming", FT_UINT16, |
| 2594 | BASE_DEC, NULL((void*)0), 0x03FF, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2595 | { &hf_st2031_packet_number, |
| 2596 | { "Packet Number", "st2031.teletext.packet_number", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, |
| 2597 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2598 | { &hf_st2031_page_units_hamming, |
| 2599 | { "Page Units (Hamming 8/4)", "st2031.teletext.page_units_hamming", FT_UINT8, |
| 2600 | BASE_HEX, NULL((void*)0), 0xFF, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2601 | { &hf_st2031_page_units, |
| 2602 | { "Page Units", "st2031.teletext.page_units", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), |
| 2603 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2604 | { &hf_st2031_page_tens_hamming, |
| 2605 | { "Page Tens (Hamming 8/4)", "st2031.teletext.page_tens_hamming", FT_UINT8, |
| 2606 | BASE_HEX, NULL((void*)0), 0xFF, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2607 | { &hf_st2031_page_tens, |
| 2608 | { "Page Tens", "st2031.teletext.page_tens", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), |
| 2609 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2610 | { &hf_st2031_data_string, |
| 2611 | { "Data String", "st2031.teletext.data_string", FT_STRING, BASE_NONE, NULL((void*)0), 0x0, |
| 2612 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2613 | { &hf_st2031_textdata_array, |
| 2614 | { "Text Data", "st2031.teletext.text_data", FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), |
| 2615 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2616 | { &hf_st2031_erase_page, |
| 2617 | { "Erase Page", "st2031.teletext.erase_page", FT_BOOLEAN, 8, NULL((void*)0), 0x01, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2618 | { &hf_st2031_newsflash, |
| 2619 | { "Newsflash", "st2031.teletext.newsflash", FT_BOOLEAN, 8, NULL((void*)0), 0x04, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2620 | { &hf_st2031_subtitle, |
| 2621 | { "Subtitle", "st2031.teletext.subtitle", FT_BOOLEAN, 8, NULL((void*)0), 0x01, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2622 | { &hf_st2031_suppress_header, |
| 2623 | { "Suppress Header", "st2031.teletext.suppress_header", FT_BOOLEAN, 8, NULL((void*)0), 0x40, |
| 2624 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2625 | { &hf_st2031_update_indicator, |
| 2626 | { "Update Indicator", "st2031.teletext.update_indicator", FT_BOOLEAN, 8, NULL((void*)0), 0x10, |
| 2627 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2628 | { &hf_st2031_interrupted_sequence, |
| 2629 | { "Interrupted Sequence", "st2031.teletext.interrupted_sequence", FT_BOOLEAN, 8, |
| 2630 | NULL((void*)0), 0x04, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2631 | { &hf_st2031_inhibit_display, |
| 2632 | { "Inhibit Display", "st2031.teletext.inhibit_display", FT_BOOLEAN, 8, NULL((void*)0), 0x01, |
| 2633 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2634 | { &hf_st2031_magazine_serial, |
| 2635 | { "Magazine Serial", "st2031.teletext.magazine_serial", FT_BOOLEAN, 8, NULL((void*)0), 0x40, |
| 2636 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2637 | { &hf_st2031_character_set, |
| 2638 | { "Character Subset", "st2031.teletext.character_set", FT_UINT8, BASE_DEC, |
| 2639 | VALS(st291_wst_national_subset_vals)((0 ? (const struct _value_string*)0 : ((st291_wst_national_subset_vals )))), 0x15, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2640 | { &hf_st2031_tt_control, |
| 2641 | { "Teletext Control", "st2031.teletext.control", FT_NONE, BASE_NONE, NULL((void*)0), 0x0, |
| 2642 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2643 | }; |
| 2644 | static int *ett[] = { &ett_st2031 }; |
| 2645 | |
| 2646 | proto_st2031 = proto_register_protocol( |
| 2647 | "SMPTE ST 2031 VBI Data", "ST 2031", "st2031"); |
| 2648 | proto_register_field_array(proto_st2031, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0])); |
| 2649 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0])); |
| 2650 | |
| 2651 | st2031_handle = register_dissector("st2031", dissect_st2031, proto_st2031); |
| 2652 | } |
| 2653 | |
| 2654 | void |
| 2655 | proto_reg_handoff_st2031(void) |
| 2656 | { |
| 2657 | dissector_add_uint("st291.did_sdid", ST2031_DID_SDID_KEY0x4108, st2031_handle); |
| 2658 | } |
| 2659 | |
| 2660 | /* |
| 2661 | * Free TV Australia OP-47 / SMPTE RDD 8 teletext |
| 2662 | */ |
| 2663 | |
| 2664 | static const st291_wst_fields_t op47_wst_fields = { |
| 2665 | &hf_op47_magazine_hamming, |
| 2666 | &hf_op47_magazine, |
| 2667 | &hf_op47_packet_number_hamming, |
| 2668 | &hf_op47_packet_number, |
| 2669 | &hf_op47_page_units_hamming, |
| 2670 | &hf_op47_page_units, |
| 2671 | &hf_op47_page_tens_hamming, |
| 2672 | &hf_op47_page_tens, |
| 2673 | &hf_op47_data_string, |
| 2674 | &hf_op47_textdata_array, |
| 2675 | &hf_op47_erase_page, |
| 2676 | &hf_op47_newsflash, |
| 2677 | &hf_op47_subtitle, |
| 2678 | &hf_op47_suppress_header, |
| 2679 | &hf_op47_update_indicator, |
| 2680 | &hf_op47_interrupted_sequence, |
| 2681 | &hf_op47_inhibit_display, |
| 2682 | &hf_op47_magazine_serial, |
| 2683 | &hf_op47_character_set, |
| 2684 | &hf_op47_tt_control, |
| 2685 | }; |
| 2686 | |
| 2687 | /* Rec. ITU-R BT.653-3, System B national-option character subsets used by OP-47 WST data. */ |
| 2688 | /* OP-47 Issue 6, Sec. 5.5.2 carries a System B WST packet; magazine, |
| 2689 | * packet number, page address, control bits and text follow Rec. ITU-R BT.653-3. */ |
| 2690 | /* Free TV Australia OP-47 Issue 6, Secs. 5.1, 5.4 and 5.5, Fig. 2. */ |
| 2691 | static int |
| 2692 | dissect_op47(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) |
| 2693 | { |
| 2694 | const st291_vanc_dissector_data_t *st291_data = (const st291_vanc_dissector_data_t *)data; |
| 2695 | proto_tree *top_tree = st291_data && st291_data->top_tree ? st291_data->top_tree : tree; |
| 2696 | proto_item *ti; |
| 2697 | proto_tree *op47_tree; |
| 2698 | unsigned len = tvb_captured_length(tvb); |
| 2699 | uint8_t format_code; |
| 2700 | unsigned offset_a = 4, offset_b = 9, i; |
| 2701 | |
| 2702 | if (len < 4) |
| 2703 | return 0; |
| 2704 | |
| 2705 | ti = proto_tree_add_item(top_tree, proto_op47, tvb, 0, -1, ENC_NA0x00000000); |
| 2706 | op47_tree = proto_item_add_subtree(ti, ett_op47); |
| 2707 | |
| 2708 | /* OP-47 Issue 6, Sec. 5.1 and Fig. 2 -- SDP identifier, length and format code. */ |
| 2709 | proto_tree_add_item(op47_tree, hf_op47_sdp_identifier, tvb, 0, 2, ENC_BIG_ENDIAN0x00000000); |
| 2710 | proto_tree_add_item(op47_tree, hf_op47_sdp_length, tvb, 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 2711 | proto_tree_add_item(op47_tree, hf_op47_sdp_format_code, tvb, 3, 1, ENC_BIG_ENDIAN0x00000000); |
| 2712 | format_code = tvb_get_uint8(tvb, 3); |
| 2713 | if (format_code != 0x02 || len < 9) |
| 2714 | return len; |
| 2715 | |
| 2716 | /* OP-47 Issue 6, Sec. 5.4 -- Packet Descriptor Structure A / adaptation header. */ |
| 2717 | ti = proto_tree_add_item(op47_tree, hf_op47_sdp_adaption_header, tvb, 4, 5, ENC_NA0x00000000); |
| 2718 | proto_item_set_generated(ti); |
| 2719 | |
| 2720 | for (i = 0; i < 5; i++) { |
| 2721 | uint8_t pkt_desc_a; |
| 2722 | uint8_t *flipped; |
| 2723 | tvbuff_t *wst_tvb; |
| 2724 | proto_tree *wst_tree; |
| 2725 | |
| 2726 | if (offset_a >= len) |
| 2727 | break; |
| 2728 | pkt_desc_a = tvb_get_uint8(tvb, offset_a); |
| 2729 | if (pkt_desc_a == 0) |
| 2730 | break; |
| 2731 | if (offset_b + 45 > len) |
| 2732 | break; |
| 2733 | |
| 2734 | /* OP-47 Issue 6, Sec. 5.5 -- Packet Descriptor Structure B; |
| 2735 | * Secs. 5.5.1-5.5.2 define clock run-in, framing code and WST data. */ |
| 2736 | ti = proto_tree_add_item(op47_tree, hf_op47_sdp_pkt_desc_b, tvb, offset_b, 45, ENC_NA0x00000000); |
| 2737 | proto_item_set_generated(ti); |
| 2738 | wst_tree = proto_item_add_subtree(ti, ett_op47_wst); |
| 2739 | |
| 2740 | ti = proto_tree_add_item(wst_tree, hf_op47_clock_runin, tvb, offset_b, 2, ENC_BIG_ENDIAN0x00000000); |
| 2741 | proto_item_set_generated(ti); |
| 2742 | ti = proto_tree_add_item(wst_tree, hf_op47_framing_code, tvb, offset_b + 2, 1, ENC_BIG_ENDIAN0x00000000); |
| 2743 | proto_item_set_generated(ti); |
| 2744 | |
| 2745 | flipped = wmem_alloc(pinfo->pool, 42); |
| 2746 | tvb_memcpy(tvb, flipped, offset_b + 3, 42); |
| 2747 | bitswap_buf_inplace(flipped, 42); |
| 2748 | |
| 2749 | wst_tvb = tvb_new_child_real_data(tvb, flipped, 42, 42); |
| 2750 | add_new_data_source(pinfo, wst_tvb, "OP-47 WST data (bit reversed)"); |
| 2751 | st291_process_wst_packet(wst_tvb, wst_tree, &op47_wst_fields); |
| 2752 | |
| 2753 | offset_a++; |
| 2754 | offset_b += 45; |
| 2755 | } |
| 2756 | |
| 2757 | return len; |
| 2758 | } |
| 2759 | |
| 2760 | void |
| 2761 | proto_register_op47(void) |
| 2762 | { |
| 2763 | static hf_register_info hf[] = { |
| 2764 | { &hf_op47_sdp_identifier, |
| 2765 | { "Identifier", "op47.sdp.identifier", FT_UINT16, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2766 | { &hf_op47_sdp_length, |
| 2767 | { "Length", "op47.sdp.length", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2768 | { &hf_op47_sdp_format_code, |
| 2769 | { "Format Code", "op47.sdp.format_code", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2770 | { &hf_op47_sdp_adaption_header, |
| 2771 | { "Adaption Header", "op47.sdp.adaption_header", FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, |
| 2772 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2773 | { &hf_op47_sdp_pkt_desc_b, |
| 2774 | { "Packet Descriptor B", "op47.sdp.packet_descriptor_b", FT_BYTES, BASE_NONE, NULL((void*)0), |
| 2775 | 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2776 | { &hf_op47_clock_runin, |
| 2777 | { "Clock Run-In", "op47.wst.clock_runin", FT_UINT16, BASE_HEX, NULL((void*)0), 0xFFFF, NULL((void*)0), |
| 2778 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2779 | { &hf_op47_framing_code, |
| 2780 | { "Framing Code", "op47.wst.framing_code", FT_UINT8, BASE_HEX, NULL((void*)0), 0xFF, NULL((void*)0), |
| 2781 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2782 | { &hf_op47_magazine_hamming, |
| 2783 | { "Magazine (Hamming 8/4)", "op47.wst.magazine_hamming", FT_UINT16, BASE_DEC, NULL((void*)0), |
| 2784 | 0xFC00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2785 | { &hf_op47_magazine, |
| 2786 | { "Magazine", "op47.wst.magazine", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2787 | { &hf_op47_packet_number_hamming, |
| 2788 | { "Packet Number (Hamming 8/4)", "op47.wst.packet_number_hamming", FT_UINT16, |
| 2789 | BASE_DEC, NULL((void*)0), 0x03FF, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2790 | { &hf_op47_packet_number, |
| 2791 | { "Packet Number", "op47.wst.packet_number", FT_UINT8, BASE_DEC, NULL((void*)0), 0x0, NULL((void*)0), |
| 2792 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2793 | { &hf_op47_page_units_hamming, |
| 2794 | { "Page Units (Hamming 8/4)", "op47.wst.page_units_hamming", FT_UINT8, BASE_HEX, |
| 2795 | NULL((void*)0), 0xFF, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2796 | { &hf_op47_page_units, |
| 2797 | { "Page Units", "op47.wst.page_units", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2798 | { &hf_op47_page_tens_hamming, |
| 2799 | { "Page Tens (Hamming 8/4)", "op47.wst.page_tens_hamming", FT_UINT8, BASE_HEX, NULL((void*)0), |
| 2800 | 0xFF, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2801 | { &hf_op47_page_tens, |
| 2802 | { "Page Tens", "op47.wst.page_tens", FT_UINT8, BASE_HEX, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2803 | { &hf_op47_data_string, |
| 2804 | { "Data String", "op47.wst.data_string", FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), |
| 2805 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2806 | { &hf_op47_textdata_array, |
| 2807 | { "Text Data", "op47.wst.text_data", FT_BYTES, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2808 | { &hf_op47_erase_page, |
| 2809 | { "Erase Page", "op47.wst.erase_page", FT_BOOLEAN, 8, NULL((void*)0), 0x01, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2810 | { &hf_op47_newsflash, |
| 2811 | { "Newsflash", "op47.wst.newsflash", FT_BOOLEAN, 8, NULL((void*)0), 0x04, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2812 | { &hf_op47_subtitle, |
| 2813 | { "Subtitle", "op47.wst.subtitle", FT_BOOLEAN, 8, NULL((void*)0), 0x01, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2814 | { &hf_op47_suppress_header, |
| 2815 | { "Suppress Header", "op47.wst.suppress_header", FT_BOOLEAN, 8, NULL((void*)0), 0x40, NULL((void*)0), |
| 2816 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2817 | { &hf_op47_update_indicator, |
| 2818 | { "Update Indicator", "op47.wst.update_indicator", FT_BOOLEAN, 8, NULL((void*)0), 0x10, NULL((void*)0), |
| 2819 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2820 | { &hf_op47_interrupted_sequence, |
| 2821 | { "Interrupted Sequence", "op47.wst.interrupted_sequence", FT_BOOLEAN, 8, NULL((void*)0), |
| 2822 | 0x04, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2823 | { &hf_op47_inhibit_display, |
| 2824 | { "Inhibit Display", "op47.wst.inhibit_display", FT_BOOLEAN, 8, NULL((void*)0), 0x01, NULL((void*)0), |
| 2825 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2826 | { &hf_op47_magazine_serial, |
| 2827 | { "Magazine Serial", "op47.wst.magazine_serial", FT_BOOLEAN, 8, NULL((void*)0), 0x40, NULL((void*)0), |
| 2828 | HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2829 | { &hf_op47_character_set, |
| 2830 | { "Character Subset", "op47.wst.character_set", FT_UINT8, BASE_DEC, |
| 2831 | VALS(st291_wst_national_subset_vals)((0 ? (const struct _value_string*)0 : ((st291_wst_national_subset_vals )))), 0x15, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2832 | { &hf_op47_tt_control, |
| 2833 | { "Teletext Control", "op47.wst.control", FT_NONE, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, |
| 2834 | }; |
| 2835 | static int *ett[] = { |
| 2836 | &ett_op47, |
| 2837 | &ett_op47_wst, |
| 2838 | }; |
| 2839 | |
| 2840 | proto_op47 = proto_register_protocol( |
| 2841 | "RDD 8 / OP-47 Subtitle Distribution Packet", "OP-47", "op47"); |
| 2842 | proto_register_field_array(proto_op47, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0])); |
| 2843 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0])); |
| 2844 | |
| 2845 | op47_handle = register_dissector("op47", dissect_op47, proto_op47); |
| 2846 | } |
| 2847 | |
| 2848 | void |
| 2849 | proto_reg_handoff_op47(void) |
| 2850 | { |
| 2851 | dissector_add_uint("st291.did_sdid", OP47_DID_SDID_KEY0x4302, op47_handle); |
| 2852 | } |
| 2853 | |
| 2854 | /* |
| 2855 | * Editor modelines - https://www.wireshark.org/tools/modelines.html |
| 2856 | * |
| 2857 | * Local variables: |
| 2858 | * c-basic-offset: 4 |
| 2859 | * tab-width: 8 |
| 2860 | * indent-tabs-mode: nil |
| 2861 | * End: |
| 2862 | * |
| 2863 | * vi: set shiftwidth=4 tabstop=8 expandtab: |
| 2864 | * :indentSize=4:tabSize=8:noTabs=true: |
| 2865 | */ |