![Gilbert Ramirez](/assets/img/avatar_default.png)
Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410
395 lines
7.8 KiB
C
395 lines
7.8 KiB
C
/* packet-mpeg1.c
|
|
*
|
|
* Routines for RFC 2250 MPEG-1 dissection
|
|
*
|
|
* $Id$
|
|
*
|
|
* Copyright 2001,
|
|
* Francisco Javier Cabello Torres, <fjcabello@vtools.es>
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
/*
|
|
* This dissector tries to dissect the MPEG-1 video streams.
|
|
*/
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
#include <epan/packet.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "rtp_pt.h"
|
|
|
|
#define RTP_MPG_MBZ(word) ( word >> 11)
|
|
#define RTP_MPG_T(word) ( (word >> 10) & 1 )
|
|
#define RTP_MPG_TR(word) ( word & 0x3ff )
|
|
|
|
#define RTP_MPG_AN(octet) ( octet >> 7)
|
|
#define RTP_MPG_N(octet) ( (octet >> 6) & 1 )
|
|
#define RTP_MPG_S(octet) ( (octet >> 5) & 1 )
|
|
#define RTP_MPG_B(octet) ( (octet >> 4) & 1 )
|
|
#define RTP_MPG_E(octet) ( (octet >> 3) & 1 )
|
|
#define RTP_MPG_P(octet) ( octet & 7 )
|
|
|
|
#define RTP_MPG_FBV(octet) ( (octet >> 7) & 1 )
|
|
#define RTP_MPG_BFC(octet) ( (octet >> 4) & 7 )
|
|
#define RTP_MPG_FFV(octet) ( (octet >> 3) & 1 )
|
|
#define RTP_MPG_FFC(octet) ( octet & 7 )
|
|
|
|
|
|
/* MPEG1 header fields */
|
|
|
|
|
|
static int proto_mpg = -1;
|
|
|
|
static int hf_rtp_mpg_mbz = -1;
|
|
static int hf_rtp_mpg_T = -1;
|
|
static int hf_rtp_mpg_tr = -1;
|
|
static int hf_rtp_mpg_an = -1;
|
|
static int hf_rtp_mpg_n = -1;
|
|
static int hf_rtp_mpg_s = -1;
|
|
static int hf_rtp_mpg_b = -1;
|
|
static int hf_rtp_mpg_e = -1;
|
|
static int hf_rtp_mpg_p = -1;
|
|
|
|
|
|
static int hf_rtp_mpg_fbv = -1;
|
|
static int hf_rtp_mpg_bfc = -1;
|
|
static int hf_rtp_mpg_ffv = -1;
|
|
static int hf_rtp_mpg_ffc = -1;
|
|
static int hf_rtp_mpg_data = -1;
|
|
|
|
|
|
|
|
/* MPEG-1 fields defining a sub tree */
|
|
static gint ett_mpg = -1;
|
|
|
|
static const value_string rtp_mpg_picture_types_vals[] =
|
|
{
|
|
{ 0, "Forbidden" },
|
|
{ 1, "I-Picture" },
|
|
{ 2, "P-Picture" },
|
|
{ 3, "B-Picture" },
|
|
{ 4, "D-Picture" },
|
|
{ 5, "reserved" },
|
|
{ 6, "reserved" },
|
|
{ 7, "reserved" },
|
|
{ 0, NULL },
|
|
};
|
|
|
|
static void
|
|
dissect_mpeg1( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree )
|
|
{
|
|
proto_item *ti = NULL;
|
|
proto_tree *mpg_tree = NULL;
|
|
unsigned int offset = 0;
|
|
|
|
guint8 octet;
|
|
guint16 word;
|
|
|
|
|
|
guint16 mpg_mbz;
|
|
guint16 mpg_T;
|
|
guint16 mpg_tr;
|
|
guint16 mpg_an;
|
|
guint16 mpg_n;
|
|
gboolean mpg_s;
|
|
gboolean mpg_b;
|
|
gboolean mpg_e;
|
|
guint16 mpg_p;
|
|
guint16 mpg_fbv;
|
|
guint16 mpg_bfc;
|
|
guint16 mpg_ffv;
|
|
guint16 mpg_ffc;
|
|
|
|
if ( check_col( pinfo->cinfo, COL_PROTOCOL ) )
|
|
{
|
|
col_set_str( pinfo->cinfo, COL_PROTOCOL, "MPEG-1" );
|
|
}
|
|
|
|
if ( check_col( pinfo->cinfo, COL_INFO) )
|
|
{
|
|
col_set_str( pinfo->cinfo, COL_INFO, "MPEG-1 message");
|
|
}
|
|
|
|
/* Get MPEG-1 fields */
|
|
|
|
word = tvb_get_guint8( tvb, offset );
|
|
word = (word << 8) | tvb_get_guint8( tvb, offset +1 );
|
|
mpg_mbz = RTP_MPG_MBZ(word);
|
|
mpg_T = RTP_MPG_T(word);
|
|
mpg_tr = RTP_MPG_TR(word);
|
|
|
|
octet = tvb_get_guint8( tvb, offset + 2 );
|
|
mpg_an = RTP_MPG_AN(octet);
|
|
mpg_n = RTP_MPG_N(octet);
|
|
mpg_s = RTP_MPG_S(octet);
|
|
mpg_b = RTP_MPG_B(octet);
|
|
mpg_e = RTP_MPG_E(octet);
|
|
mpg_p = RTP_MPG_P(octet);
|
|
|
|
octet = tvb_get_guint8( tvb, offset + 3 );
|
|
|
|
mpg_fbv = RTP_MPG_FBV(octet);
|
|
mpg_bfc = RTP_MPG_BFC(octet);
|
|
mpg_ffv = RTP_MPG_FFV(octet);
|
|
mpg_ffc = RTP_MPG_FFC(octet);
|
|
|
|
|
|
if ( tree )
|
|
{
|
|
ti = proto_tree_add_item( tree, proto_mpg, tvb, offset, -1, FALSE );
|
|
mpg_tree = proto_item_add_subtree( ti, ett_mpg );
|
|
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_mbz, tvb, offset, 1, mpg_mbz );
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_T , tvb, offset, 1, mpg_T );
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_tr , tvb, offset, 2, mpg_tr );
|
|
offset += 2;
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_an, tvb, offset, 1, mpg_an );
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_n , tvb, offset, 1, mpg_n );
|
|
proto_tree_add_boolean( mpg_tree, hf_rtp_mpg_s , tvb, offset, 1, mpg_s );
|
|
proto_tree_add_boolean( mpg_tree, hf_rtp_mpg_b , tvb, offset, 1, mpg_b );
|
|
proto_tree_add_boolean( mpg_tree, hf_rtp_mpg_e , tvb, offset, 1, mpg_e );
|
|
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_p, tvb , offset, 1, mpg_p );
|
|
offset += 1;
|
|
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_fbv, tvb, offset, 1, mpg_fbv );
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_bfc, tvb, offset, 1, mpg_bfc );
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_ffv, tvb, offset, 1, mpg_ffv );
|
|
proto_tree_add_uint( mpg_tree, hf_rtp_mpg_ffc, tvb, offset, 1, mpg_ffc );
|
|
offset += 1;
|
|
|
|
/* The rest of the packet is the MPEG-1 stream */
|
|
proto_tree_add_item( mpg_tree, hf_rtp_mpg_data, tvb, offset, -1, FALSE );
|
|
|
|
}
|
|
}
|
|
|
|
void
|
|
proto_register_mpeg1(void)
|
|
{
|
|
static hf_register_info hf[] =
|
|
{
|
|
{
|
|
&hf_rtp_mpg_mbz,
|
|
{
|
|
"MBZ",
|
|
"rtp.payload_mpeg_mbz",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtp_mpg_T,
|
|
{
|
|
"T",
|
|
"rtp.payload_mpeg_T",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtp_mpg_tr,
|
|
{
|
|
"Temporal Reference",
|
|
"rtp.payload_mpeg_tr",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtp_mpg_an,
|
|
{
|
|
"AN",
|
|
"rtp.payload_mpeg_an",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_n,
|
|
{
|
|
"New Picture Header",
|
|
"rtp.payload_mpeg_n",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_s,
|
|
{
|
|
"Sequence Header",
|
|
"rtp.payload_mpeg_s",
|
|
FT_BOOLEAN,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_b,
|
|
{
|
|
"Beginning-of-slice",
|
|
"rtp.payload_mpeg_b",
|
|
FT_BOOLEAN,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_e,
|
|
{
|
|
"End-of-slice",
|
|
"rtp.payload_mpeg_an",
|
|
FT_BOOLEAN,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_p,
|
|
{
|
|
"Picture type",
|
|
"rtp.payload_mpeg_p",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
VALS(rtp_mpg_picture_types_vals),
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_fbv,
|
|
{
|
|
"FBV",
|
|
"rtp.payload_mpeg_fbv",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_bfc,
|
|
{
|
|
"BFC",
|
|
"rtp.payload_mpeg_bfc",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtp_mpg_ffv,
|
|
{
|
|
"FFV",
|
|
"rtp.payload_mpeg_ffv",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
{
|
|
&hf_rtp_mpg_ffc,
|
|
{
|
|
"FFC",
|
|
"rtp.payload_mpeg_ffc",
|
|
FT_UINT16,
|
|
BASE_DEC,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
{
|
|
&hf_rtp_mpg_data,
|
|
{
|
|
"MPEG-1 stream",
|
|
"mpeg1.stream",
|
|
FT_BYTES,
|
|
BASE_NONE,
|
|
NULL,
|
|
0x0,
|
|
"", HFILL
|
|
}
|
|
},
|
|
|
|
};
|
|
|
|
static gint *ett[] =
|
|
{
|
|
&ett_mpg,
|
|
};
|
|
|
|
|
|
proto_mpg = proto_register_protocol("RFC 2250 MPEG1","MPEG1","mpeg1");
|
|
proto_register_field_array(proto_mpg, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_mpeg1(void)
|
|
{
|
|
dissector_handle_t mpeg1_handle;
|
|
|
|
mpeg1_handle = create_dissector_handle(dissect_mpeg1, proto_mpg);
|
|
dissector_add("rtp.pt", PT_MPV, mpeg1_handle);
|
|
}
|