![Anders Broman](/assets/img/avatar_default.png)
Q.931:I mprovesthe dissection of Q.931 Channel Identification information elements, by using proper (filterable) header fields rather than text tree items. H253: make the h.263 dissector dissect the group-of-block number which comes after a GOB start code. svn path=/trunk/; revision=18323
831 lines
23 KiB
C
831 lines
23 KiB
C
/* packet-h263.c
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*
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* Routines for ITU-T Recommendation H.263 dissection
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*
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* Copyright 2003 Niklas Ögren <niklas.ogren@7l.se>
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* Seven Levels Consultants AB
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* Copied structure from packet-h261.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* This dissector tries to dissect the H.263 protocol according to
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* ITU-T Recommendations and RFC 2190
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <glib.h>
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#include <epan/packet.h>
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#include <stdio.h>
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#include <string.h>
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#include <epan/rtp_pt.h>
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#include <epan/iax2_codec_type.h>
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static void dissect_h263_data( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree );
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/* H.263 header fields */
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static int proto_h263 = -1;
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static int proto_h263_data = -1;
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/* Mode A header */
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static int hf_h263_ftype = -1;
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static int hf_h263_pbframes = -1;
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static int hf_h263_sbit = -1;
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static int hf_h263_ebit = -1;
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static int hf_h263_srcformat = -1;
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static int hf_h263_picture_coding_type = -1;
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static int hf_h263_unrestricted_motion_vector = -1;
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static int hf_h263_syntax_based_arithmetic = -1;
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static int hf_h263_advanced_prediction = -1;
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static int hf_h263_r = -1;
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static int hf_h263_rr = -1;
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static int hf_h263_dbq = -1;
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static int hf_h263_trb = -1;
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static int hf_h263_tr = -1;
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/* Additional fields for Mode B or C header */
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static int hf_h263_quant = -1;
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static int hf_h263_gobn = -1;
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static int hf_h263_mba = -1;
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static int hf_h263_hmv1 = -1;
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static int hf_h263_vmv1 = -1;
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static int hf_h263_hmv2 = -1;
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static int hf_h263_vmv2 = -1;
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/* Fields for the data section */
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static int hf_h263_psc = -1;
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static int hf_h263_gbsc = -1;
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static int hf_h263_TR =-1;
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static int hf_h263_split_screen_indicator = -1;
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static int hf_h263_document_camera_indicator = -1;
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static int hf_h263_full_picture_freeze_release = -1;
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static int hf_h263_source_format = -1;
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static int hf_h263_payload_picture_coding_type = -1;
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static int hf_h263_opt_unres_motion_vector_mode = -1;
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static int hf_h263_syntax_based_arithmetic_coding_mode = -1;
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static int hf_h263_optional_advanced_prediction_mode = -1;
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static int hf_h263_PB_frames_mode = -1;
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static int hf_h263_data = -1;
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static int hf_h263_payload = -1;
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static int hf_h263_GN = -1;
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/* Source format types */
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#define SRCFORMAT_FORB 0 /* forbidden */
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#define SRCFORMAT_SQCIF 1
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#define SRCFORMAT_QCIF 2
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#define SRCFORMAT_CIF 3
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#define SRCFORMAT_4CIF 4
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#define SRCFORMAT_16CIF 5
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static const value_string srcformat_vals[] =
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{
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{ SRCFORMAT_FORB, "forbidden" },
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{ SRCFORMAT_SQCIF, "sub-QCIF 128x96" },
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{ SRCFORMAT_QCIF, "QCIF 176x144" },
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{ SRCFORMAT_CIF, "CIF 352x288" },
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{ SRCFORMAT_4CIF, "4CIF 704x576" },
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{ SRCFORMAT_16CIF, "16CIF 1408x1152" },
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{ 0, NULL },
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};
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static const true_false_string on_off_flg = {
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"On",
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"Off"
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};
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static const true_false_string picture_coding_type_flg = {
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"INTER (P-picture)",
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"INTRA (I-picture)"
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};
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static const true_false_string PB_frames_mode_flg = {
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"PB-frame",
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"Normal I- or P-picture"
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};
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/* H.263 fields defining a sub tree */
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static gint ett_h263 = -1;
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static gint ett_h263_payload = -1;
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static void
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dissect_h263( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
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{
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proto_item *ti = NULL;
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proto_tree *h263_tree = NULL;
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unsigned int offset = 0;
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unsigned int h263_version = 0;
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tvbuff_t *next_tvb;
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h263_version = (tvb_get_guint8( tvb, offset ) & 0xc0 ) >> 6;
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if ( check_col( pinfo->cinfo, COL_PROTOCOL ) ) {
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col_set_str( pinfo->cinfo, COL_PROTOCOL, "H.263 " );
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}
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if( h263_version == 0x00) {
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if ( check_col( pinfo->cinfo, COL_INFO) ) {
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col_append_str( pinfo->cinfo, COL_INFO, "MODE A ");
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}
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}
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else if( h263_version == 0x02) {
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if ( check_col( pinfo->cinfo, COL_INFO) ) {
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col_append_str( pinfo->cinfo, COL_INFO, "MODE B ");
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}
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}
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else if( h263_version == 0x03) {
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if ( check_col( pinfo->cinfo, COL_INFO) ) {
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col_append_str( pinfo->cinfo, COL_INFO, "MODE C ");
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}
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}
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if ( tree ) {
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ti = proto_tree_add_item( tree, proto_h263, tvb, offset, -1, FALSE );
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h263_tree = proto_item_add_subtree( ti, ett_h263 );
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/* FBIT 1st octet, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_ftype, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x80 );
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/* PBIT 1st octet, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_pbframes, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x40 );
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/* SBIT 1st octet, 3 bits */
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proto_tree_add_uint( h263_tree, hf_h263_sbit, tvb, offset, 1, ( tvb_get_guint8( tvb, offset ) & 0x38 ) >> 3 );
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/* EBIT 1st octet, 3 bits */
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proto_tree_add_uint( h263_tree, hf_h263_ebit, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x7 );
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offset++;
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/* SRC 2nd octet, 3 bits */
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proto_tree_add_uint( h263_tree, hf_h263_srcformat, tvb, offset, 1, tvb_get_guint8( tvb, offset ) >> 5 );
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if(h263_version == 0x00) { /* MODE A */
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/* I flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_picture_coding_type, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x10 );
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/* U flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_unrestricted_motion_vector, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x08 );
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/* S flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_syntax_based_arithmetic, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x04 );
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/* A flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_advanced_prediction, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x02 );
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/* Reserved 2nd octect, 1 bit + 3rd octect 3 bits */
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proto_tree_add_uint( h263_tree, hf_h263_r, tvb, offset, 2, ( ( tvb_get_guint8( tvb, offset ) & 0x1 ) << 3 ) + ( ( tvb_get_guint8( tvb, offset + 1 ) & 0xe0 ) >> 5 ) );
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offset++;
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/* DBQ 3 octect, 2 bits */
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proto_tree_add_uint( h263_tree, hf_h263_dbq, tvb, offset, 1, ( tvb_get_guint8( tvb, offset ) & 0x18 ) >> 3 );
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/* TRB 3 octect, 3 bits */
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proto_tree_add_uint( h263_tree, hf_h263_trb, tvb, offset, 1, ( tvb_get_guint8( tvb, offset ) & 0x07 ) );
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offset++;
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/* TR 4 octect, 8 bits */
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proto_tree_add_uint( h263_tree, hf_h263_tr, tvb, offset, 1, tvb_get_guint8( tvb, offset ) );
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offset++;
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} else { /* MODE B or MODE C */
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/* QUANT 2 octect, 5 bits */
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proto_tree_add_uint( h263_tree, hf_h263_quant, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x1f );
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offset++;
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/* GOBN 3 octect, 5 bits */
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proto_tree_add_uint( h263_tree, hf_h263_gobn, tvb, offset, 1, ( tvb_get_guint8( tvb, offset ) & 0xf8 ) >> 3);
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/* MBA 3 octect, 3 bits + 4 octect 6 bits */
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proto_tree_add_uint( h263_tree, hf_h263_mba, tvb, offset, 2, ( ( tvb_get_guint8( tvb, offset ) & 0x7 ) << 6 ) + ( ( tvb_get_guint8( tvb, offset + 1 ) & 0xfc ) >> 2 ) );
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offset++;
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/* Reserved 4th octect, 2 bits */
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proto_tree_add_uint( h263_tree, hf_h263_r, tvb, offset, 1, ( tvb_get_guint8( tvb, offset ) & 0x3 ) );
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offset++;
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/* I flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_picture_coding_type, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x80 );
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/* U flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_unrestricted_motion_vector, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x40 );
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/* S flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_syntax_based_arithmetic, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x20 );
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/* A flag, 1 bit */
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proto_tree_add_boolean( h263_tree, hf_h263_advanced_prediction, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x10 );
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/* HMV1 5th octect, 4 bits + 6th octect 3 bits*/
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proto_tree_add_uint( h263_tree, hf_h263_hmv1, tvb, offset, 2,( ( tvb_get_guint8( tvb, offset ) & 0xf ) << 3 ) + ( ( tvb_get_guint8( tvb, offset+1 ) & 0xe0 ) >> 5) );
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offset++;
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/* VMV1 6th octect, 5 bits + 7th octect 2 bits*/
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proto_tree_add_uint( h263_tree, hf_h263_vmv1, tvb, offset, 2,( ( tvb_get_guint8( tvb, offset ) & 0x1f ) << 2 ) + ( ( tvb_get_guint8( tvb, offset+1 ) & 0xc0 ) >> 6) );
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offset++;
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/* HMV2 7th octect, 6 bits + 8th octect 1 bit*/
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proto_tree_add_uint( h263_tree, hf_h263_hmv2, tvb, offset, 2,( ( tvb_get_guint8( tvb, offset ) & 0x3f ) << 1 ) + ( ( tvb_get_guint8( tvb, offset+1 ) & 0xf0 ) >> 7) );
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offset++;
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/* VMV2 8th octect, 7 bits*/
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proto_tree_add_uint( h263_tree, hf_h263_vmv2, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x7f );
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offset++;
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if(h263_version == 0x03) { /* MODE C */
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/* Reserved 9th to 11th octect, 8 + 8 + 3 bits */
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proto_tree_add_uint( h263_tree, hf_h263_rr, tvb, offset, 3, ( tvb_get_guint8( tvb, offset ) << 11 ) + ( tvb_get_guint8( tvb, offset + 1 ) << 3 ) + ( ( tvb_get_guint8( tvb, offset + 2 ) & 0xe0 ) >> 5 ) );
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offset+=2;
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/* DBQ 11th octect, 2 bits */
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proto_tree_add_uint( h263_tree, hf_h263_dbq, tvb, offset, 1, ( tvb_get_guint8( tvb, offset ) & 0x18 ) >>3 );
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/* TRB 11th octect, 3 bits */
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proto_tree_add_uint( h263_tree, hf_h263_trb, tvb, offset, 1, tvb_get_guint8( tvb, offset ) & 0x07 );
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offset++;
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/* TR 12th octect, 8 bits */
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proto_tree_add_uint( h263_tree, hf_h263_tr, tvb, offset, 1, tvb_get_guint8( tvb, offset ) );
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offset++;
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} /* end mode c */
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} /* end not mode a */
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/* The rest of the packet is the H.263 stream */
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next_tvb = tvb_new_subset( tvb, offset, tvb_length(tvb) - offset, tvb_reported_length(tvb) - offset);
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dissect_h263_data( next_tvb, pinfo, h263_tree );
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}
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}
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static void dissect_h263_data( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
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{
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guint offset = 0;
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proto_item *h263_payload_item = NULL;
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proto_tree *h263_payload_tree = NULL;
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guint32 data;
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guint8 octet;
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if ( check_col( pinfo->cinfo, COL_INFO) ) {
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col_append_str( pinfo->cinfo, COL_INFO, "H263 payload ");
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}
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if( tree ) {
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h263_payload_item = proto_tree_add_item( tree, hf_h263_payload, tvb, offset, -1, FALSE );
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h263_payload_tree = proto_item_add_subtree( h263_payload_item, ett_h263_payload );
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}
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/* Check for PSC, PSC is a word of 22 bits. Its value is 0000 0000 0000 0000' 1000 00xx xxxx xxxx. */
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data = tvb_get_ntohl(tvb, offset);
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if (( data & 0xffff8000) == 0x00008000 ) { /* PSC or Group of Block Start Code (GBSC) found */
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if (( data & 0x00007c00) == 0 ) { /* PSC found */
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if ( check_col( pinfo->cinfo, COL_INFO) )
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col_append_str( pinfo->cinfo, COL_INFO, "(PSC) ");
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if( tree ) {
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proto_tree_add_uint(h263_payload_tree, hf_h263_psc,tvb, offset,3,data);
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offset = offset + 2;
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proto_tree_add_uint(h263_payload_tree, hf_h263_TR,tvb, offset,2,data);
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/* Last two bits in the 32 bits fetched
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* Bit 1: Always "1", in order to avoid start code emulation.
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* Bit 2: Always "0", for distinction with Recommendation H.261.
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*/
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offset = offset + 2;
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/* Bit 3: Split screen indicator, "0" off, "1" on. */
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proto_tree_add_item( h263_payload_tree, hf_h263_split_screen_indicator, tvb, offset, 1, FALSE );
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/* Bit 4: Document camera indicator, */
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proto_tree_add_item( h263_payload_tree, hf_h263_document_camera_indicator, tvb, offset, 1, FALSE );
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/* Bit 5: Full Picture Freeze Release, "0" off, "1" on. */
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proto_tree_add_item( h263_payload_tree, hf_h263_full_picture_freeze_release, tvb, offset, 1, FALSE );
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/* Bits 6-8: Source Format, "000" forbidden, "001" sub-QCIF, "010" QCIF, "011" CIF,
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* "100" 4CIF, "101" 16CIF, "110" reserved, "111" extended PTYPE.
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*/
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proto_tree_add_item( h263_payload_tree, hf_h263_source_format, tvb, offset, 1, TRUE );
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octet = tvb_get_guint8(tvb,offset);
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if (( octet & 0x1c) != 0x1c){
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/* Not extended PTYPE */
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/* Bit 9: Picture Coding Type, "0" INTRA (I-picture), "1" INTER (P-picture). */
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proto_tree_add_item( h263_payload_tree, hf_h263_payload_picture_coding_type, tvb, offset, 1, FALSE );
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/* Bit 10: Optional Unrestricted Motion Vector mode (see Annex D), "0" off, "1" on. */
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proto_tree_add_item( h263_payload_tree, hf_h263_opt_unres_motion_vector_mode, tvb, offset, 1, FALSE );
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offset++;
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/* Bit 11: Optional Syntax-based Arithmetic Coding mode (see Annex E), "0" off, "1" on.*/
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proto_tree_add_item( h263_payload_tree, hf_h263_syntax_based_arithmetic_coding_mode, tvb, offset, 1, FALSE );
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/* Bit 12: Optional Advanced Prediction mode (see Annex F), "0" off, "1" on.*/
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proto_tree_add_item( h263_payload_tree, hf_h263_optional_advanced_prediction_mode, tvb, offset, 1, FALSE );
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/* Bit 13: Optional PB-frames mode (see Annex G), "0" normal I- or P-picture, "1" PB-frame.*/
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proto_tree_add_item( h263_payload_tree, hf_h263_PB_frames_mode, tvb, offset, 1, FALSE );
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}
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}
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} else { /* GBSC found */
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if ( check_col( pinfo->cinfo, COL_INFO) )
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col_append_str( pinfo->cinfo, COL_INFO, "(GBSC) ");
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if( tree ) {
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/* Group of Block Start Code (GBSC) (17 bits)
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* A word of 17 bits. Its value is 0000 0000 0000 0000 1. GOB start codes may be byte aligned. This
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* can be achieved by inserting GSTUF before the start code such that the first bit of the start code is
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* the first (most significant) bit of a byte.
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*
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*/
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proto_tree_add_uint(h263_payload_tree, hf_h263_gbsc,tvb, offset,3,data);
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proto_tree_add_uint(h263_payload_tree, hf_h263_GN, tvb, offset,3,data);
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/* GN is followed by (optionally) GBSI, then
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* GFID and GQUANT, but decoding them requires
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* knowing the value of CPM in the picture
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* header */
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offset = offset + 2;
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}
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}
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}
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if( tree )
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proto_tree_add_item( h263_payload_tree, hf_h263_data, tvb, offset, -1, FALSE );
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}
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void
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proto_register_h263(void)
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{
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static hf_register_info hf[] =
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{
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{
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&hf_h263_ftype,
|
|
{
|
|
"F",
|
|
"h263.ftype",
|
|
FT_BOOLEAN,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Indicates the mode of the payload header (MODE A or B/C)", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_pbframes,
|
|
{
|
|
"p/b frame",
|
|
"h263.pbframes",
|
|
FT_BOOLEAN,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Optional PB-frames mode as defined by H.263 (MODE C)", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_sbit,
|
|
{
|
|
"Start bit position",
|
|
"h263.sbit",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Start bit position specifies number of most significant bits that shall be ignored in the first data byte.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_ebit,
|
|
{
|
|
"End bit position",
|
|
"h263.ebit",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"End bit position specifies number of least significant bits that shall be ignored in the last data byte.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_srcformat,
|
|
{
|
|
"SRC format",
|
|
"h263.srcformat",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
VALS(srcformat_vals),
|
|
0x0,
|
|
"Source format specifies the resolution of the current picture.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_picture_coding_type,
|
|
{
|
|
"Inter-coded frame",
|
|
"h263.picture_coding_type",
|
|
FT_BOOLEAN,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Picture coding type, intra-coded (false) or inter-coded (true)", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_unrestricted_motion_vector,
|
|
{
|
|
"Motion vector",
|
|
"h263.unrestricted_motion_vector",
|
|
FT_BOOLEAN,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Unrestricted Motion Vector option for current picture", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_syntax_based_arithmetic,
|
|
{
|
|
"Syntax-based arithmetic coding",
|
|
"h263.syntax_based_arithmetic",
|
|
FT_BOOLEAN,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Syntax-based Arithmetic Coding option for current picture", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_advanced_prediction,
|
|
{
|
|
"Advanced prediction option",
|
|
"h263.advanced_prediction",
|
|
FT_BOOLEAN,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"Advanced Prediction option for current picture", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_dbq,
|
|
{
|
|
"Differential quantization parameter",
|
|
"h263.dbq",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Differential quantization parameter used to calculate quantizer for the B frame based on quantizer for the P frame, when PB-frames option is used.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_trb,
|
|
{
|
|
"Temporal Reference for B frames",
|
|
"h263.trb",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Temporal Reference for the B frame as defined by H.263", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_tr,
|
|
{
|
|
"Temporal Reference for P frames",
|
|
"h263.tr",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Temporal Reference for the P frame as defined by H.263", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_quant,
|
|
{
|
|
"Quantizer",
|
|
"h263.quant",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Quantization value for the first MB coded at the starting of the packet.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_gobn,
|
|
{
|
|
"GOB Number",
|
|
"h263.gobn",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"GOB number in effect at the start of the packet.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_mba,
|
|
{
|
|
"Macroblock address",
|
|
"h263.mba",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"The address within the GOB of the first MB in the packet, counting from zero in scan order.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_hmv1,
|
|
{
|
|
"Horizontal motion vector 1",
|
|
"h263.hmv1",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Horizontal motion vector predictor for the first MB in this packet ", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_vmv1,
|
|
{
|
|
"Vertical motion vector 1",
|
|
"h263.vmv1",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Vertical motion vector predictor for the first MB in this packet ", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_hmv2,
|
|
{
|
|
"Horizontal motion vector 2",
|
|
"h263.hmv2",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Horizontal motion vector predictor for block number 3 in the first MB in this packet when four motion vectors are used with the advanced prediction option.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_vmv2,
|
|
{
|
|
"Vertical motion vector 2",
|
|
"h263.vmv2",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Vertical motion vector predictor for block number 3 in the first MB in this packet when four motion vectors are used with the advanced prediction option.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_r,
|
|
{
|
|
"Reserved field",
|
|
"h263.r",
|
|
FT_UINT8,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Reserved field that houls contain zeroes", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_rr,
|
|
{
|
|
"Reserved field 2",
|
|
"h263.rr",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"Reserved field that should contain zeroes", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_payload,
|
|
{
|
|
"H.263 payload",
|
|
"h263.payload",
|
|
FT_NONE,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"The actual H.263 data", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_data,
|
|
{
|
|
"H.263 stream",
|
|
"h263.stream",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"The H.263 stream including its Picture, GOB or Macro block start code.", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_psc,
|
|
{
|
|
"H.263 Picture start Code",
|
|
"h263.psc",
|
|
FT_UINT32,
|
|
BASE_HEX,
|
|
NULL,
|
|
0xfffffc00,
|
|
"Picture start Code, PSC", HFILL
|
|
}
|
|
},
|
|
{ &hf_h263_gbsc,
|
|
{
|
|
"H.263 Group of Block Start Code",
|
|
"h263.gbsc",
|
|
FT_UINT32,
|
|
BASE_HEX,
|
|
NULL,
|
|
0xffff8000,
|
|
"Group of Block Start Code", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_TR,
|
|
{
|
|
"H.263 Temporal Reference",
|
|
"h263.tr2",
|
|
FT_UINT32,
|
|
BASE_HEX,
|
|
NULL,
|
|
0x000003fc,
|
|
"Temporal Reference, TR", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_split_screen_indicator,
|
|
{
|
|
"H.263 Split screen indicator",
|
|
"h263.split_screen_indicator",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&on_off_flg),
|
|
0x80,
|
|
"Split screen indicator", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_document_camera_indicator,
|
|
{
|
|
"H.263 Document camera indicator",
|
|
"h263.document_camera_indicator",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&on_off_flg),
|
|
0x40,
|
|
"Document camera indicator", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_full_picture_freeze_release,
|
|
{
|
|
"H.263 Full Picture Freeze Release",
|
|
"h263.split_screen_indicator",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&on_off_flg),
|
|
0x20,
|
|
"Full Picture Freeze Release", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_source_format,
|
|
{
|
|
"H.263 Source Format",
|
|
"h263.split_screen_indicator",
|
|
FT_UINT8,
|
|
BASE_HEX,
|
|
VALS(srcformat_vals),
|
|
0x1c,
|
|
"Source Format", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_payload_picture_coding_type,
|
|
{
|
|
"H.263 Picture Coding Type",
|
|
"h263.picture_coding_type",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&picture_coding_type_flg),
|
|
0x02,
|
|
"Picture Coding Typet", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_opt_unres_motion_vector_mode,
|
|
{
|
|
"H.263 Optional Unrestricted Motion Vector mode",
|
|
"h263.opt_unres_motion_vector_mode",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&on_off_flg),
|
|
0x01,
|
|
"Optional Unrestricted Motion Vector mode", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_syntax_based_arithmetic_coding_mode,
|
|
{
|
|
"H.263 Optional Syntax-based Arithmetic Coding mode",
|
|
"h263.syntax_based_arithmetic_coding_mode",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&on_off_flg),
|
|
0x80,
|
|
"Optional Syntax-based Arithmetic Coding mode", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_optional_advanced_prediction_mode,
|
|
{
|
|
"H.263 Optional Advanced Prediction mode",
|
|
"h263.optional_advanced_prediction_mode",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&on_off_flg),
|
|
0x40,
|
|
"Optional Advanced Prediction mode", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_PB_frames_mode,
|
|
{
|
|
"H.263 Optional PB-frames mode",
|
|
"h263.PB_frames_mode",
|
|
FT_BOOLEAN,
|
|
8,
|
|
TFS(&PB_frames_mode_flg),
|
|
0x20,
|
|
"Optional PB-frames mode", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_h263_GN,
|
|
{
|
|
"H.263 Group Number",
|
|
"h263.gn",
|
|
FT_UINT32,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x00007c00,
|
|
"Group Number, GN", HFILL
|
|
}
|
|
},
|
|
};
|
|
|
|
static gint *ett[] =
|
|
{
|
|
&ett_h263,
|
|
&ett_h263_payload,
|
|
};
|
|
|
|
|
|
proto_h263 = proto_register_protocol("ITU-T Recommendation H.263 RTP Payload header (RFC2190)",
|
|
"H.263", "h263");
|
|
proto_h263_data = proto_register_protocol("ITU-T Recommendation H.263",
|
|
"H.263 data", "h263data");
|
|
proto_register_field_array(proto_h263, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
register_dissector("h263", dissect_h263, proto_h263);
|
|
register_dissector("h263data", dissect_h263_data, proto_h263_data);
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_h263(void)
|
|
{
|
|
dissector_handle_t h263_handle;
|
|
|
|
h263_handle = find_dissector("h263");
|
|
dissector_add("rtp.pt", PT_H263, h263_handle);
|
|
dissector_add("iax2.codec", AST_FORMAT_H263, h263_handle);
|
|
}
|