/* MPEG Packetized Elementary Stream (PES) packet decoder. * Written by Shaun Jackman . * Copyright 2007 Shaun Jackman * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include #include "packet-per.h" #include "packet-mpeg-pes-hf.c" #include "packet-mpeg-pes-ett.c" #include "packet-mpeg-pes-fn.c" void proto_register_mpeg_pes(void); void proto_reg_handoff_mpeg_pes(void); static int proto_mpeg; static int proto_mpeg_pes; static int ett_mpeg_pes_pack_header; static int ett_mpeg_pes_header_data; static int ett_mpeg_pes_trick_mode; static int hf_mpeg_pes_pack_header; static int hf_mpeg_pes_scr; static int hf_mpeg_pes_program_mux_rate; static int hf_mpeg_pes_stuffing_length; static int hf_mpeg_pes_stuffing; static int hf_mpeg_pes_extension; static int hf_mpeg_pes_header_data; static int hf_mpeg_pes_pts; static int hf_mpeg_pes_dts; static int hf_mpeg_pes_escr; static int hf_mpeg_pes_es_rate; static int hf_mpeg_pes_dsm_trick_mode; static int hf_mpeg_pes_dsm_trick_mode_control; static int hf_mpeg_pes_dsm_trick_mode_field_id; static int hf_mpeg_pes_dsm_trick_mode_intra_slice_refresh; static int hf_mpeg_pes_dsm_trick_mode_frequency_truncation; static int hf_mpeg_pes_dsm_trick_mode_rep_cntrl; static int hf_mpeg_pes_copy_info; static int hf_mpeg_pes_crc; static int hf_mpeg_pes_extension_flags; static int hf_mpeg_pes_private_data; static int hf_mpeg_pes_pack_length; static int hf_mpeg_pes_sequence; static int hf_mpeg_pes_pstd_buffer; static int hf_mpeg_pes_extension2; static int hf_mpeg_pes_padding; static int hf_mpeg_pes_data; static int hf_mpeg_video_sequence_header; static int hf_mpeg_video_sequence_extension; static int hf_mpeg_video_group_of_pictures; static int hf_mpeg_video_picture; static int hf_mpeg_video_quantization_matrix; static int hf_mpeg_video_data; static dissector_handle_t mpeg_handle; static dissector_table_t stream_type_table; enum { PES_PREFIX = 1 }; /* * MPEG uses 32-bit start codes that all begin with the three byte sequence * 00 00 01 (the start code prefix) for bit and byte alignment, among other * purposes. * * The values from 0xb9 through 0xff are "system start codes" and described in * ISO/IEC 13818-1:2019 / ITU-T H.222.0. The bulk of them, 0xbc through 0xff, * are stream_id values and documented in Table 2-22 "Stream_id assignments". * The remaining three are used by Program Streams and found as follows: * 0xb9, the MPEG_program_end_code, in 2.5.3.2 "Semantic definition of fields * in program stream" * 0xba, the pack_start_code, in 2.5.3.4 "Semantic definition of fields in * program stream pack" * 0xbb, the system_header_start_code, in 2.5.3.6 "Semantic definition of fields * in system header" * * The remaining 185 values from 0x00 to 0xb8 are used by MPEG-2 video * (backwards compatible with MPEG-1 video) and documented in ISO/IEC 13818-2 / * ITU-T H.262 (2000), in Table 6-1 "Start code values". These are not stream * id values and do not mark PES packets, but rather demarcate elements in the * coded MPEG-1/2 video bitstream, at a different hierarchical level than the * PES packets. The sets of values used for video start codes and for stream * ids are disjoint to avoid any ambiguity when resynchronizing. Note the * dissector currently conflates MPEG video with MPEG PES. * * Care is taken to ensure that the start code prefix 0x000001 does not occur * elsewhere in the structure (avoiding "emulation of start codes"). * * The video can have other formats, given by the stream type, carried on * TS in the PMT and in PS from the similar Program Stream Map. AVC/H.264 and * HEVC/H.265 carried in PES also use the start code prefix, before each NAL, * and escape the raw byte sequence with bytes that prevent internal start code * prefixes. The byte following the prefix (the first byte of the NAL header) * has high bit zero, so the values of the NAL header are in the range used by * the MPEG-2 video bitstream, not the range used by stream ids, allowing for * synchronization in the same way. See Annex B "Byte Stream Format" of H.264 * and H.265. */ enum { STREAM_PICTURE = 0x00, STREAM_SEQUENCE = 0xb3, STREAM_SEQUENCE_EXTENSION = 0xb5, STREAM_GOP = 0xb8, STREAM_END = 0xb9, STREAM_PACK = 0xba, STREAM_SYSTEM = 0xbb, STREAM_PROGRAM = 0xbc, STREAM_PRIVATE1 = 0xbd, STREAM_PADDING = 0xbe, STREAM_PRIVATE2 = 0xbf, STREAM_AUDIO = 0xc0, STREAM_VIDEO = 0xe0 }; enum { PTS_FLAG = 0x80, DTS_FLAG = 0x40, ESCR_FLAG = 0x20, ES_RATE_FLAG = 0x10, DSM_TRICK_MODE_FLAG = 0x08, COPY_INFO_FLAG = 0x04, CRC_FLAG = 0x02, EXTENSION_FLAG = 0x01 }; enum { PRIVATE_DATA_FLAG = 0x80, PACK_LENGTH_FLAG = 0x40, SEQUENCE_FLAG = 0x20, PSTD_BUFFER_FLAG = 0x10, MUST_BE_ONES = 0x07, EXTENSION_FLAG2 = 0x01 }; enum { FAST_FORWARD_CONTROL = 0x00, SLOW_MOTION_CONTROL = 0x01, FREEZE_FRAME_CONTROL = 0x02, FAST_REVERSE_CONTROL = 0x03, SLOW_REVERSE_CONTROL = 0x04 }; static const value_string mpeg_pes_TrickModeControl_vals[] = { { FAST_FORWARD_CONTROL, "fast-forward" }, { SLOW_MOTION_CONTROL, "slow-motion" }, { FREEZE_FRAME_CONTROL, "freeze-frame" }, { FAST_REVERSE_CONTROL, "fast-reverse" }, { SLOW_REVERSE_CONTROL, "slow-reverse" }, { 5, "reserved" }, { 6, "reserved" }, { 7, "reserved" }, { 0, NULL } }; static const value_string mpeg_pes_TrickModeFieldId_vals[] = { { 0, "display-from-top-field-only" }, { 1, "display-from-bottom-field-only" }, { 2, "display-complete-frame" }, { 3, "reserved" }, { 0, NULL } }; static const value_string mpeg_pes_TrickModeIntraSliceRefresh_vals[] = { { 0, "macroblocks-may-not-be-missing" }, { 1, "macroblocks-may-be-missing" }, { 0, NULL } }; static const value_string mpeg_pes_TrickModeFrequencyTruncation_vals[] = { { 0, "only-DC-coefficients-are-non-zero" }, { 1, "only-the-first-three-coefficients-are-non-zero" }, { 2, "only-the-first-six-coefficients-are-non-zero" }, { 3, "all-coefficients-may-be-non-zero" }, { 0, NULL } }; #define TSHZ 90000 static uint64_t decode_time_stamp(tvbuff_t *tvb, int offset, nstime_t *nst) { uint64_t bytes = tvb_get_ntoh40(tvb, offset); uint64_t ts = (bytes >> 33 & 0x0007) << 30 | (bytes >> 17 & 0x7fff) << 15 | (bytes >> 1 & 0x7fff) << 0; unsigned int rem = (unsigned int)(ts % TSHZ); nst->secs = (time_t)(ts / TSHZ); nst->nsecs = (int)(INT64_C(1000000000) * rem / TSHZ); return ts; } #define SCRHZ 27000000 static uint64_t decode_clock_reference(tvbuff_t *tvb, int offset, nstime_t *nst) { uint64_t bytes = tvb_get_ntoh48(tvb, offset); uint64_t ts = (bytes >> 43 & 0x0007) << 30 | (bytes >> 27 & 0x7fff) << 15 | (bytes >> 11 & 0x7fff) << 0; unsigned int ext = (unsigned int)((bytes >> 1) & 0x1ff); uint64_t cr = 300 * ts + ext; unsigned int rem = (unsigned int)(cr % SCRHZ); nst->secs = (time_t)(cr / SCRHZ); nst->nsecs = (int)(INT64_C(1000000000) * rem / SCRHZ); return cr; } static int dissect_mpeg_pes_header_data(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *root, unsigned int flags) { proto_item *item = proto_tree_add_item(root, hf_mpeg_pes_header_data, tvb, 0, -1, ENC_NA); proto_tree *tree = proto_item_add_subtree(item, ett_mpeg_pes_header_data); int offset = 0; if (flags & PTS_FLAG) { nstime_t nst; decode_time_stamp(tvb, offset, &nst); proto_tree_add_time(tree, hf_mpeg_pes_pts, tvb, offset, 5, &nst); offset += 5; } if (flags & DTS_FLAG) { nstime_t nst; decode_time_stamp(tvb, offset, &nst); proto_tree_add_time(tree, hf_mpeg_pes_dts, tvb, offset, 5, &nst); offset += 5; } if (flags & ESCR_FLAG) { nstime_t nst; decode_clock_reference(tvb, offset, &nst); proto_tree_add_time(tree, hf_mpeg_pes_escr, tvb, offset, 6, &nst); offset += 6; } if (flags & ES_RATE_FLAG) { unsigned int es_rate = (tvb_get_ntohs(tvb, offset) >> 1 & 0x3fff) * 50; proto_tree_add_uint(tree, hf_mpeg_pes_es_rate, tvb, offset, 3, es_rate); offset += 3; } if (flags & DSM_TRICK_MODE_FLAG) { uint8_t value = tvb_get_uint8(tvb, offset); uint8_t control; proto_tree *trick_tree; proto_item *trick_item; trick_item = proto_tree_add_item(item, hf_mpeg_pes_dsm_trick_mode, tvb, offset, 1, ENC_NA); trick_tree = proto_item_add_subtree(trick_item, ett_mpeg_pes_trick_mode); control = (value >> 5); proto_tree_add_uint(trick_tree, hf_mpeg_pes_dsm_trick_mode_control, tvb, offset, 1, control); if (control == FAST_FORWARD_CONTROL || control == FAST_REVERSE_CONTROL) { proto_tree_add_uint(trick_tree, hf_mpeg_pes_dsm_trick_mode_field_id, tvb, offset, 1, (value & 0x18) >> 3); proto_tree_add_uint(trick_tree, hf_mpeg_pes_dsm_trick_mode_intra_slice_refresh, tvb, offset, 1, (value & 0x04) >> 2); proto_tree_add_uint(trick_tree, hf_mpeg_pes_dsm_trick_mode_frequency_truncation, tvb, offset, 1, (value & 0x03)); } else if (control == SLOW_MOTION_CONTROL || control == SLOW_REVERSE_CONTROL) { proto_tree_add_uint(trick_tree, hf_mpeg_pes_dsm_trick_mode_rep_cntrl, tvb, offset, 1, (value & 0x1F)); } else if (control == FREEZE_FRAME_CONTROL) { proto_tree_add_uint(trick_tree, hf_mpeg_pes_dsm_trick_mode_field_id, tvb, offset, 1, (value & 0x18) >> 3); } offset += 1; } if (flags & COPY_INFO_FLAG) { proto_tree_add_item(tree, hf_mpeg_pes_copy_info, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; } if (flags & CRC_FLAG) { proto_tree_add_item(tree, hf_mpeg_pes_crc, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; } if (flags & EXTENSION_FLAG) { int flags2 = tvb_get_uint8(tvb, offset); proto_tree_add_item(tree, hf_mpeg_pes_extension_flags, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; if (flags2 & PRIVATE_DATA_FLAG) { proto_tree_add_item(tree, hf_mpeg_pes_private_data, tvb, offset, 16, ENC_NA); offset += 16; } if (flags2 & PACK_LENGTH_FLAG) { proto_tree_add_item(tree, hf_mpeg_pes_pack_length, tvb, offset, 1, ENC_BIG_ENDIAN); offset++; } if (flags2 & SEQUENCE_FLAG) { proto_tree_add_item(tree, hf_mpeg_pes_sequence, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; } if (flags2 & PSTD_BUFFER_FLAG) { unsigned int pstd = tvb_get_ntohs(tvb, offset); proto_tree_add_uint(tree, hf_mpeg_pes_pstd_buffer, tvb, offset, 2, (pstd & 0x2000 ? 1024 : 128) * (pstd & 0x1ff)); offset += 2; } if (flags2 & EXTENSION_FLAG2) { proto_tree_add_item(tree, hf_mpeg_pes_extension2, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; } } return offset; } static int dissect_mpeg_pes_pack_header(tvbuff_t *tvb, int offset, packet_info *pinfo _U_, proto_tree *root) { unsigned int program_mux_rate, stuffing_length; proto_item *item = proto_tree_add_item(root, hf_mpeg_pes_pack_header, tvb, offset / 8, 10, ENC_NA); proto_tree *tree = proto_item_add_subtree(item, ett_mpeg_pes_pack_header); nstime_t nst; decode_clock_reference(tvb, offset / 8, &nst); proto_tree_add_time(tree, hf_mpeg_pes_scr, tvb, offset / 8, 6, &nst); offset += 6 * 8; program_mux_rate = (tvb_get_ntoh24(tvb, offset / 8) >> 2) * 50; proto_tree_add_uint(tree, hf_mpeg_pes_program_mux_rate, tvb, offset / 8, 3, program_mux_rate); offset += 3 * 8; stuffing_length = tvb_get_uint8(tvb, offset / 8) & 0x07; proto_tree_add_item(tree, hf_mpeg_pes_stuffing_length, tvb, offset / 8, 1, ENC_BIG_ENDIAN); offset += 1 * 8; if (stuffing_length > 0) { proto_tree_add_item(tree, hf_mpeg_pes_stuffing, tvb, offset / 8, stuffing_length, ENC_NA); offset += stuffing_length * 8; } return offset; } static int dissect_mpeg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data); static int // NOLINTNEXTLINE(misc-no-recursion) dissect_mpeg_pes(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { int prefix; int stream; asn1_ctx_t asn1_ctx; int offset = 0; uint8_t stream_type; if (!tvb_bytes_exist(tvb, 0, 3)) return 0; /* not enough bytes for a PES prefix */ prefix = tvb_get_ntoh24(tvb, 0); if (prefix != PES_PREFIX) return 0; col_set_str(pinfo->cinfo, COL_PROTOCOL, "MPEG PES"); col_clear(pinfo->cinfo, COL_INFO); stream = tvb_get_uint8(tvb, 3); col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(stream, mpeg_pes_T_stream_vals, "Unknown stream: %d")); /* Were we called from MP2T providing a stream type from a PMT? */ stream_type = GPOINTER_TO_UINT(data); /* Luckily, stream_type 0 is reserved, so a null value is fine. * XXX: Implement Program Stream Map for Program Stream (similar * to PMT but maps stream_ids to stream_types instead of PIDs.) */ asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, true, pinfo); offset = dissect_mpeg_pes_PES(tvb, offset, &asn1_ctx, tree, proto_mpeg_pes); increment_dissection_depth(pinfo); if (stream == STREAM_PICTURE) { int frame_type; frame_type = tvb_get_uint8(tvb, 5) >> 3 & 0x07; col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", val_to_str(frame_type, mpeg_pes_T_frame_type_vals, "Unknown frame type: %d")); offset = dissect_mpeg_pes_Picture(tvb, offset, &asn1_ctx, tree, hf_mpeg_video_picture); proto_tree_add_item(tree, hf_mpeg_video_data, tvb, offset / 8, -1, ENC_NA); } else if (stream == STREAM_SEQUENCE) { tvbuff_t *es; offset = dissect_mpeg_pes_Sequence_header(tvb, offset, &asn1_ctx, tree, hf_mpeg_video_sequence_header); proto_tree_add_item(tree, hf_mpeg_video_quantization_matrix, tvb, offset / 8, 64, ENC_NA); offset += 64 * 8; es = tvb_new_subset_remaining(tvb, offset / 8); dissect_mpeg_pes(es, pinfo, tree, NULL); } else if (stream == STREAM_SEQUENCE_EXTENSION) { tvbuff_t *es; offset = dissect_mpeg_pes_Sequence_extension(tvb, offset, &asn1_ctx, tree, hf_mpeg_video_sequence_extension); es = tvb_new_subset_remaining(tvb, offset / 8); dissect_mpeg_pes(es, pinfo, tree, NULL); } else if (stream == STREAM_GOP) { tvbuff_t *es; offset = dissect_mpeg_pes_Group_of_pictures(tvb, offset, &asn1_ctx, tree, hf_mpeg_video_group_of_pictures); es = tvb_new_subset_remaining(tvb, offset / 8); dissect_mpeg_pes(es, pinfo, tree, NULL); } else if (stream == STREAM_PACK) { if (tvb_get_uint8(tvb, offset / 8) >> 6 == 1) { dissect_mpeg_pes_pack_header(tvb, offset, pinfo, tree); } else { proto_tree_add_item(tree, hf_mpeg_pes_data, tvb, offset / 8, 8, ENC_NA); } } else if (stream == STREAM_SYSTEM || stream == STREAM_PRIVATE2) { unsigned int data_length = tvb_get_ntohs(tvb, offset / 8); proto_tree_add_item(tree, hf_mpeg_pes_length, tvb, offset / 8, 2, ENC_BIG_ENDIAN); offset += 2 * 8; proto_tree_add_item(tree, hf_mpeg_pes_data, tvb, offset / 8, data_length, ENC_NA); } else if (stream == STREAM_PADDING) { unsigned int padding_length = tvb_get_ntohs(tvb, offset / 8); proto_tree_add_item(tree, hf_mpeg_pes_length, tvb, offset / 8, 2, ENC_BIG_ENDIAN); offset += 2 * 8; proto_tree_add_item(tree, hf_mpeg_pes_padding, tvb, offset / 8, padding_length, ENC_NA); } else if (stream == STREAM_PRIVATE1 || stream >= STREAM_AUDIO) { int length = tvb_get_ntohs(tvb, 4); if ((tvb_get_uint8(tvb, 6) & 0xc0) == 0x80) { int header_length; tvbuff_t *es; int save_offset = offset; offset = dissect_mpeg_pes_Stream(tvb, offset, &asn1_ctx, tree, hf_mpeg_pes_extension); /* https://gitlab.com/wireshark/wireshark/-/issues/2229 * A value of 0 indicates that the PES packet length * is neither specified nor bounded and is allowed * only in PES packets whose payload is a video * elementary stream contained in Transport Stream * packets. * * See ISO/IEC 13818-1:2007, section 2.4.3.7 * "Semantic definition of fields in PES packet", * which says of the PES_packet_length that "A value * of 0 indicates that the PES packet length is * neither specified nor bounded and is allowed only * in PES packets whose payload consists of bytes * from a video elementary stream contained in * Transport Stream packets." */ if(length !=0 && stream != STREAM_VIDEO){ /* * XXX - note that ISO/IEC 13818-1:2007 * says that the length field is *not* * part of the above extension. * * This means that the length of the length * field itself should *not* be subtracted * from the length field; ISO/IEC 13818-1:2007 * says that the PES_packet_length field is * "A 16-bit field specifying the number of * bytes in the PES packet following the * last byte of the field." * * So we calculate the size of the extension, * in bytes, by subtracting the saved bit * offset value from the current bit offset * value, divide by 8 to convert to a size * in bytes, and then subtract 2 to remove * the length field's length from the total * length. * * (In addition, ISO/IEC 13818-1:2007 * suggests that the length field is * always present, but this code, when * processing some stream ID types, doesn't * treat it as being present. Where are * the formats of those payloads specified?) */ length -= ((offset - save_offset) / 8) - 2; } header_length = tvb_get_uint8(tvb, 8); if (header_length > 0) { int flags = tvb_get_uint8(tvb, 7); tvbuff_t *header_data = tvb_new_subset_length(tvb, offset / 8, header_length); dissect_mpeg_pes_header_data(header_data, pinfo, tree, flags); offset += header_length * 8; /* length may be zero for Video stream */ if(length !=0 && stream != STREAM_VIDEO){ length -= header_length; } } /* length may be zero for Video stream */ if(length==0){ es = tvb_new_subset_remaining(tvb, offset / 8); } else { es = tvb_new_subset_length_caplen(tvb, offset / 8, -1, length); } if (!dissector_try_uint_new(stream_type_table, stream_type, es, pinfo, tree, true, NULL)) { /* If we didn't get a stream type, then assume * MPEG-1/2 Audio or Video. */ if (tvb_get_ntoh24(es, 0) == PES_PREFIX) dissect_mpeg_pes(es, pinfo, tree, NULL); else if (tvb_get_uint8(es, 0) == 0xff) dissect_mpeg(es, pinfo, tree, NULL); else proto_tree_add_item(tree, hf_mpeg_pes_data, es, 0, -1, ENC_NA); } } else { unsigned int data_length = tvb_get_ntohs(tvb, offset / 8); proto_tree_add_item(tree, hf_mpeg_pes_length, tvb, offset / 8, 2, ENC_BIG_ENDIAN); offset += 2 * 8; proto_tree_add_item(tree, hf_mpeg_pes_data, tvb, offset / 8, data_length, ENC_NA); } } else if (stream != STREAM_END) { proto_tree_add_item(tree, hf_mpeg_pes_data, tvb, offset / 8, -1, ENC_NA); } decrement_dissection_depth(pinfo); return tvb_reported_length(tvb); } static heur_dissector_list_t heur_subdissector_list; static int dissect_mpeg(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { heur_dtbl_entry_t *hdtbl_entry; if (!dissector_try_heuristic(heur_subdissector_list, tvb, pinfo, tree, &hdtbl_entry, NULL)) { col_set_str(pinfo->cinfo, COL_PROTOCOL, "MPEG"); col_clear(pinfo->cinfo, COL_INFO); proto_tree_add_item(tree, proto_mpeg, tvb, 0, -1, ENC_NA); } return tvb_captured_length(tvb); } static bool dissect_mpeg_pes_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { return dissect_mpeg_pes(tvb, pinfo, tree, data) > 0; } void proto_register_mpeg_pes(void) { static hf_register_info hf[] = { #include "packet-mpeg-pes-hfarr.c" { &hf_mpeg_pes_pack_header, { "Pack header", "mpeg-pes.pack", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_scr, { "system clock reference (SCR)", "mpeg-pes.scr", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_program_mux_rate, { "PES program mux rate", "mpeg-pes.program-mux-rate", FT_UINT24, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_stuffing_length, { "PES stuffing length", "mpeg-pes.stuffing-length", FT_UINT8, BASE_DEC, NULL, 0x07, NULL, HFILL }}, { &hf_mpeg_pes_stuffing, { "PES stuffing bytes", "mpeg-pes.stuffing", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_extension, { "PES extension", "mpeg-pes.extension", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_header_data, { "PES header data", "mpeg-pes.header-data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_pts, { "presentation time stamp (PTS)", "mpeg-pes.pts", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_dts, { "decode time stamp (DTS)", "mpeg-pes.dts", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_escr, { "elementary stream clock reference (ESCR)", "mpeg-pes.escr", FT_RELATIVE_TIME, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_es_rate, { "elementary stream rate", "mpeg-pes.es-rate", FT_UINT24, BASE_DEC, NULL, 0x7ffe, NULL, HFILL }}, { &hf_mpeg_pes_dsm_trick_mode, { "Trick mode", "mpeg-pes.trick-mode", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_dsm_trick_mode_control, { "control", "mpeg-pes.trick-mode-control", FT_UINT8, BASE_HEX, VALS(mpeg_pes_TrickModeControl_vals), 0, "mpeg_pes trick mode control", HFILL }}, { &hf_mpeg_pes_dsm_trick_mode_field_id, { "field id", "mpeg-pes.trick-mode-field-id", FT_UINT8, BASE_HEX, VALS(mpeg_pes_TrickModeFieldId_vals), 0, "mpeg_pes trick mode field id", HFILL }}, { &hf_mpeg_pes_dsm_trick_mode_intra_slice_refresh, { "intra slice refresh", "mpeg-pes.trick-mode-intra-slice-refresh", FT_UINT8, BASE_HEX, VALS(mpeg_pes_TrickModeIntraSliceRefresh_vals), 0, "mpeg_pes trick mode intra slice refresh", HFILL }}, { &hf_mpeg_pes_dsm_trick_mode_frequency_truncation, { "frequency truncation", "mpeg-pes.trick-mode-frequency-truncation", FT_UINT8, BASE_HEX, VALS(mpeg_pes_TrickModeFrequencyTruncation_vals), 0, "mpeg_pes trick mode frequency truncation", HFILL }}, { &hf_mpeg_pes_dsm_trick_mode_rep_cntrl, { "rep cntrl", "mpeg-pes.trick-mode-rep-cntrl", FT_UINT8, BASE_HEX, NULL, 0, "mpeg_pes trick mode rep cntrl", HFILL }}, { &hf_mpeg_pes_copy_info, { "copy info", "mpeg-pes.copy-info", FT_UINT8, BASE_DEC, NULL, 0x7f, NULL, HFILL }}, { &hf_mpeg_pes_crc, { "CRC", "mpeg-pes.crc", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_extension_flags, { "extension flags", "mpeg-pes.extension-flags", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_private_data, { "private data", "mpeg-pes.private-data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_pack_length, { "pack length", "mpeg-pes.pack-length", FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_sequence, { "sequence", "mpeg-pes.sequence", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_pstd_buffer, { "P-STD buffer size", "mpeg-pes.pstd-buffer", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_extension2, { "extension2", "mpeg-pes.extension2", FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_padding, { "PES padding", "mpeg-pes.padding", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_pes_data, { "PES data", "mpeg-pes.data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_video_sequence_header, { "MPEG sequence header", "mpeg-video.sequence", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_video_sequence_extension, { "MPEG sequence extension", "mpeg-video.sequence-ext", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_video_group_of_pictures, { "MPEG group of pictures", "mpeg-video.gop", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_video_picture, { "MPEG picture", "mpeg-video.picture", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_video_quantization_matrix, { "MPEG quantization matrix", "mpeg-video.quant", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_video_data, { "MPEG picture data", "mpeg-video.data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, }; static int *ett[] = { #include "packet-mpeg-pes-ettarr.c" &ett_mpeg_pes_pack_header, &ett_mpeg_pes_header_data, &ett_mpeg_pes_trick_mode }; proto_mpeg = proto_register_protocol("Moving Picture Experts Group", "MPEG", "mpeg"); mpeg_handle = register_dissector("mpeg", dissect_mpeg, proto_mpeg); heur_subdissector_list = register_heur_dissector_list_with_description("mpeg", "MPEG payload", proto_mpeg); proto_mpeg_pes = proto_register_protocol("Packetized Elementary Stream", "MPEG PES", "mpeg-pes"); proto_register_field_array(proto_mpeg_pes, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); register_dissector("mpeg-pes", dissect_mpeg_pes, proto_mpeg_pes); stream_type_table = register_dissector_table("mpeg-pes.stream", "MPEG PES stream type", proto_mpeg_pes, FT_UINT8, BASE_HEX); } void proto_reg_handoff_mpeg_pes(void) { dissector_add_uint("wtap_encap", WTAP_ENCAP_MPEG, mpeg_handle); heur_dissector_add("mpeg", dissect_mpeg_pes_heur, "MPEG PES", "mpeg_pes", proto_mpeg_pes, HEURISTIC_ENABLE); dissector_add_uint("mpeg-pes.stream", 0x1B, find_dissector_add_dependency("h264_bytestream", proto_mpeg_pes)); dissector_add_uint("mpeg-pes.stream", 0x24, find_dissector_add_dependency("h265_bytestream", proto_mpeg_pes)); }