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-rw-r--r--epan/dissectors/packet-mpeg1.c394
1 files changed, 394 insertions, 0 deletions
diff --git a/epan/dissectors/packet-mpeg1.c b/epan/dissectors/packet-mpeg1.c
new file mode 100644
index 0000000000..e0a94920e1
--- /dev/null
+++ b/epan/dissectors/packet-mpeg1.c
@@ -0,0 +1,394 @@
+/* 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);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-18 05:17:12 +0000