Imported Upstream version 1.1.1+rev1355upstream/1.1.1+rev1355

7 files changed, 253 insertions, 187 deletions

diff --git a/util/szap/Makefile b/util/szap/Makefile
index b341c74..48d7149 100644
--- a/util/szap/Makefile
+++ b/util/szap/Makefile
@@ -1,6 +1,6 @@
 # Makefile for linuxtv.org dvb-apps/util/szap
 
-objects  = lnb.o
+objects  = lnb.o util.o
 
 binaries = azap  \
            czap  \
diff --git a/util/szap/azap.c b/util/szap/azap.c
index 5bd7f33..93addf8 100644
--- a/util/szap/azap.c
+++ b/util/szap/azap.c
@@ -13,6 +13,8 @@
 #include <linux/dvb/frontend.h>
 #include <linux/dvb/dmx.h>
 
+#include "util.h"
+
 static char FRONTEND_DEV [80];
 static char DEMUX_DEV [80];
 
@@ -209,31 +211,6 @@ int parse(const char *fname, const char *channel,
 
 
 static
-int set_pesfilter (int fd, int pid, dmx_pes_type_t type, int dvr)
-{
-        struct dmx_pes_filter_params pesfilter;
-
-        if (pid <= 0 || pid >= 0x1fff)
-                return 0;
-
-        pesfilter.pid = pid;
-        pesfilter.input = DMX_IN_FRONTEND;
-        pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER;
-        pesfilter.pes_type = type;
-        pesfilter.flags = DMX_IMMEDIATE_START;
-
-        if (ioctl(fd, DMX_SET_PES_FILTER, &pesfilter) < 0) {
-                PERROR ("ioctl(DMX_SET_PES_FILTER) for %s PID failed",
-                        type == DMX_PES_AUDIO ? "Audio" :
-                        type == DMX_PES_VIDEO ? "Video" : "??");
-                return -1;
-        }
-
-        return 0;
-}
-
-
-static
 int setup_frontend (int fe_fd, struct dvb_frontend_parameters *frontend)
 {
 	struct dvb_frontend_info fe_info;
diff --git a/util/szap/czap.c b/util/szap/czap.c
index 469df56..e04ed4b 100644
--- a/util/szap/czap.c
+++ b/util/szap/czap.c
@@ -13,6 +13,8 @@
 #include <linux/dvb/frontend.h>
 #include <linux/dvb/dmx.h>
 
+#include "util.h"
+
 
 static char FRONTEND_DEV [80];
 static char DEMUX_DEV [80];
@@ -118,7 +120,7 @@ char *find_channel(FILE *f, int list_channels, int *chan_no, const char *channel
 
 
 int parse(const char *fname, int list_channels, int chan_no, const char *channel,
-	  struct dvb_frontend_parameters *frontend, int *vpid, int *apid)
+	  struct dvb_frontend_parameters *frontend, int *vpid, int *apid, int *sid)
 {
 	FILE *f;
 	char *chan;
@@ -141,10 +143,10 @@ int parse(const char *fname, int list_channels, int chan_no, const char *channel
 	}
 	printf("%3d %s", chan_no, chan);
 
-	if ((sscanf(chan, "%a[^:]:%d:%a[^:]:%d:%a[^:]:%a[^:]:%d:%d\n",
+	if ((sscanf(chan, "%m[^:]:%d:%m[^:]:%d:%m[^:]:%m[^:]:%d:%d:%d\n",
 				&name, &frontend->frequency,
 				&inv, &frontend->u.qam.symbol_rate,
-				&fec, &mod, vpid, apid) != 8)
+				&fec, &mod, vpid, apid, sid) != 9)
 			|| !name || !inv || !fec | !mod) {
 		ERROR("cannot parse service data");
 		return -3;
@@ -165,10 +167,10 @@ int parse(const char *fname, int list_channels, int chan_no, const char *channel
 		ERROR("modulation field syntax '%s'", mod);
 		return -6;
 	}
-	printf("%3d %s: f %d, s %d, i %d, fec %d, qam %d, v %#x, a %#x\n",
+	printf("%3d %s: f %d, s %d, i %d, fec %d, qam %d, v %#x, a %#x, s %#x \n",
 			chan_no, name, frontend->frequency, frontend->u.qam.symbol_rate,
 			frontend->inversion, frontend->u.qam.fec_inner,
-			frontend->u.qam.modulation, *vpid, *apid);
+			frontend->u.qam.modulation, *vpid, *apid, *sid);
 	free(name);
 	free(inv);
 	free(fec);
@@ -178,31 +180,6 @@ int parse(const char *fname, int list_channels, int chan_no, const char *channel
 }
 
 
-
-static
-int set_pesfilter (int fd, int pid, dmx_pes_type_t type, int dvr)
-{
-	struct dmx_pes_filter_params pesfilter;
-
-	if (pid <= 0 || pid >= 0x1fff)
-		return 0;
-
-	pesfilter.pid = pid;
-	pesfilter.input = DMX_IN_FRONTEND;
-	pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER;
-	pesfilter.pes_type = type;
-	pesfilter.flags = DMX_IMMEDIATE_START;
-
-	if (ioctl(fd, DMX_SET_PES_FILTER, &pesfilter) < 0) {
-		PERROR ("ioctl(DMX_SET_PES_FILTER) for %s PID failed",
-			type == DMX_PES_AUDIO ? "Audio" :
-			type == DMX_PES_VIDEO ? "Video" : "??");
-		return -1;
-	}
-
-	return 0;
-}
-
 static
 int setup_frontend(int fe_fd, struct dvb_frontend_parameters *frontend)
 {
@@ -264,9 +241,20 @@ int check_frontend (int fe_fd, int human_readable)
 }
 
 
-static const char *usage = "\nusage: %s [-a adapter_num] [-f frontend_id] [-d demux_id] [-c conf_file] [ -H ] {<channel name>| -n channel_num} [-x]\n"
-	"   or: %s [-c conf_file]  -l\n\n";
-
+static const char *usage =
+    "\nusage: %s [options]  -l\n"
+    "         list known channels\n"
+    "       %s [options] {-n channel-number|channel_name}\n"
+    "         zap to channel via number or full name (case insensitive)\n"
+    "     -a number : use given adapter (default 0)\n"
+    "     -f number : use given frontend (default 0)\n"
+    "     -d number : use given demux (default 0)\n"
+    "     -c file   : read channels list from 'file'\n"
+    "     -x        : exit after tuning\n"
+    "     -H        : human readable output\n"
+    "     -r        : set up /dev/dvb/adapterX/dvr0 for TS recording\n"
+    "     -p        : add pat and pmt to TS recording (implies -r)\n"
+;
 
 int main(int argc, char **argv)
 {
@@ -275,12 +263,12 @@ int main(int argc, char **argv)
 	char *confname = NULL;
 	char *channel = NULL;
 	int adapter = 0, frontend = 0, demux = 0, dvr = 0;
-	int vpid, apid;
-	int frontend_fd, video_fd, audio_fd;
+	int vpid, apid, sid, pmtpid = 0;
+	int frontend_fd, video_fd, audio_fd, pat_fd, pmt_fd;
 	int opt, list_channels = 0, chan_no = 0;
-	int human_readable = 0;
+	int human_readable = 0, rec_psi = 0;
 
-	while ((opt = getopt(argc, argv, "Hln:hrn:a:f:d:c:x")) != -1) {
+	while ((opt = getopt(argc, argv, "Hln:hrn:a:f:d:c:x:p")) != -1) {
 		switch (opt) {
 		case 'a':
 			adapter = strtoul(optarg, NULL, 0);
@@ -300,6 +288,9 @@ int main(int argc, char **argv)
 		case 'n':
 			chan_no = strtoul(optarg, NULL, 0);
 			break;
+		case 'p':
+			rec_psi = 1;
+			break;
 		case 'x':
 			exit_after_tuning = 1;
 			break;
@@ -352,7 +343,7 @@ int main(int argc, char **argv)
 
 	memset(&frontend_param, 0, sizeof(struct dvb_frontend_parameters));
 
-	if (parse(confname, list_channels, chan_no, channel, &frontend_param, &vpid, &apid))
+	if (parse(confname, list_channels, chan_no, channel, &frontend_param, &vpid, &apid, &sid))
 		return -1;
 	if (list_channels)
 		return 0;
@@ -365,6 +356,28 @@ int main(int argc, char **argv)
 	if (setup_frontend(frontend_fd, &frontend_param) < 0)
 		return -1;
 
+	if (rec_psi) {
+		pmtpid = get_pmt_pid(DEMUX_DEV, sid);
+		if (pmtpid <= 0) {
+			fprintf(stderr,"couldn't find pmt-pid for sid %04x\n",sid);
+			return -1;
+		}
+
+		if ((pat_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
+			perror("opening pat demux failed");
+			return -1;
+		}
+		if (set_pesfilter(pat_fd, 0, DMX_PES_OTHER, dvr) < 0)
+			return -1;
+
+		if ((pmt_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
+			perror("opening pmt demux failed");
+			return -1;
+		}
+		if (set_pesfilter(pmt_fd, pmtpid, DMX_PES_OTHER, dvr) < 0)
+			return -1;
+	}
+
 	if ((video_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
 		PERROR("failed opening '%s'", DEMUX_DEV);
 		return -1;
@@ -383,6 +396,8 @@ int main(int argc, char **argv)
 
 	check_frontend (frontend_fd, human_readable);
 
+	close (pat_fd);
+	close (pmt_fd);
 	close (audio_fd);
 	close (video_fd);
 	close (frontend_fd);
diff --git a/util/szap/szap.c b/util/szap/szap.c
index ed1aa51..78da3a6 100644
--- a/util/szap/szap.c
+++ b/util/szap/szap.c
@@ -48,6 +48,7 @@
 #include <linux/dvb/dmx.h>
 #include <linux/dvb/audio.h>
 #include "lnb.h"
+#include "util.h"
 
 #ifndef TRUE
 #define TRUE (1==1)
@@ -92,94 +93,6 @@ static char *usage_str =
     "     -p        : add pat and pmt to TS recording (implies -r)\n"
     "                 or -n numbers for zapping\n";
 
-static int set_demux(int dmxfd, int pid, int pes_type, int dvr)
-{
-   struct dmx_pes_filter_params pesfilter;
-
-   if (pid < 0 || pid >= 0x1fff) /* ignore this pid to allow radio services */
-	   return TRUE;
-
-   if (dvr) {
-      int buffersize = 64 * 1024;
-      if (ioctl(dmxfd, DMX_SET_BUFFER_SIZE, buffersize) == -1)
-        perror("DMX_SET_BUFFER_SIZE failed");
-   }
-
-   pesfilter.pid = pid;
-   pesfilter.input = DMX_IN_FRONTEND;
-   pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER;
-   pesfilter.pes_type = pes_type;
-   pesfilter.flags = DMX_IMMEDIATE_START;
-
-   if (ioctl(dmxfd, DMX_SET_PES_FILTER, &pesfilter) == -1) {
-      fprintf(stderr, "DMX_SET_PES_FILTER failed "
-	      "(PID = 0x%04x): %d %m\n", pid, errno);
-      return FALSE;
-   }
-
-   return TRUE;
-}
-
-int get_pmt_pid(char *dmxdev, int sid)
-{
-   int patfd, count;
-   int pmt_pid = 0;
-   int patread = 0;
-   int section_length;
-   unsigned char buft[4096];
-   unsigned char *buf = buft;
-   struct dmx_sct_filter_params f;
-
-   memset(&f, 0, sizeof(f));
-   f.pid = 0;
-   f.filter.filter[0] = 0x00;
-   f.filter.mask[0] = 0xff;
-   f.timeout = 0;
-   f.flags = DMX_IMMEDIATE_START | DMX_CHECK_CRC;
-
-   if ((patfd = open(dmxdev, O_RDWR)) < 0) {
-      perror("openening pat demux failed");
-      return -1;
-   }
-
-   if (ioctl(patfd, DMX_SET_FILTER, &f) == -1) {
-      perror("ioctl DMX_SET_FILTER failed");
-      close(patfd);
-      return -1;
-   }
-
-   while (!patread){
-      if (((count = read(patfd, buf, sizeof(buft))) < 0) && errno == EOVERFLOW)
-         count = read(patfd, buf, sizeof(buft));
-      if (count < 0) {
-         perror("read_sections: read error");
-         close(patfd);
-         return -1;
-      }
-
-      section_length = ((buf[1] & 0x0f) << 8) | buf[2];
-      if (count != section_length + 3)
-         continue;
-
-      buf += 8;
-      section_length -= 8;
-
-      patread = 1; /* assumes one section contains the whole pat */
-      while (section_length > 0) {
-         int service_id = (buf[0] << 8) | buf[1];
-         if (service_id == sid) {
-            pmt_pid = ((buf[2] & 0x1f) << 8) | buf[3];
-            section_length = 0;
-         }
-         buf += 4;
-         section_length -= 4;
-     }
-   }
-
-   close(patfd);
-   return pmt_pid;
-}
-
 struct diseqc_cmd {
    struct dvb_diseqc_master_cmd cmd;
    uint32_t wait;
@@ -390,10 +303,10 @@ int zap_to(unsigned int adapter, unsigned int frontend, unsigned int demux,
 
    if (diseqc(fefd, sat_no, pol, hiband))
       if (do_tune(fefd, ifreq, sr))
-	 if (set_demux(dmxfdv, vpid, DMX_PES_VIDEO, dvr))
+	 if (set_pesfilter(dmxfdv, vpid, DMX_PES_VIDEO, dvr))
 	    if (audiofd >= 0)
 	       (void)ioctl(audiofd, AUDIO_SET_BYPASS_MODE, bypass);
-	    if (set_demux(dmxfda, apid, DMX_PES_AUDIO, dvr)) {
+	    if (set_pesfilter(dmxfda, apid, DMX_PES_AUDIO, dvr)) {
 	       if (rec_psi) {
 	          pmtpid = get_pmt_pid(dmxdev, sid);
 		  if (pmtpid < 0) {
@@ -403,8 +316,8 @@ int zap_to(unsigned int adapter, unsigned int frontend, unsigned int demux,
 		     fprintf(stderr,"couldn't find pmt-pid for sid %04x\n",sid);
 		     result = FALSE;
 		  }
-		  if (set_demux(patfd, 0, DMX_PES_OTHER, dvr))
-	             if (set_demux(pmtfd, pmtpid, DMX_PES_OTHER, dvr))
+		  if (set_pesfilter(patfd, 0, DMX_PES_OTHER, dvr))
+	             if (set_pesfilter(pmtfd, pmtpid, DMX_PES_OTHER, dvr))
 	                result = TRUE;
 	          } else {
 		    result = TRUE;
diff --git a/util/szap/tzap.c b/util/szap/tzap.c
index cd87bfa..b24bc2c 100644
--- a/util/szap/tzap.c
+++ b/util/szap/tzap.c
@@ -35,6 +35,8 @@
 #include <linux/dvb/frontend.h>
 #include <linux/dvb/dmx.h>
 
+#include "util.h"
+
 static char FRONTEND_DEV [80];
 static char DEMUX_DEV [80];
 static char DVR_DEV [80];
@@ -269,7 +271,8 @@ static int check_fec(fe_code_rate_t *fec)
 
 
 int parse(const char *fname, const char *channel,
-	  struct dvb_frontend_parameters *frontend, int *vpid, int *apid)
+	  struct dvb_frontend_parameters *frontend, int *vpid, int *apid,
+	  int *sid)
 {
 	int fd;
 	int err;
@@ -343,7 +346,11 @@ int parse(const char *fname, const char *channel,
 
 	if ((err = try_parse_int(fd, apid, "Audio PID")))
 		return -13;
-
+	
+	if ((err = try_parse_int(fd, sid, "Service ID")))
+	    return -14;
+	
+	
 	close(fd);
 
 	return 0;
@@ -351,31 +358,6 @@ int parse(const char *fname, const char *channel,
 
 
 static
-int set_pesfilter (int fd, int pid, dmx_pes_type_t type, int dvr)
-{
-        struct dmx_pes_filter_params pesfilter;
-
-        if (pid <= 0 || pid >= 0x1fff)
-                return 0;
-
-        pesfilter.pid = pid;
-        pesfilter.input = DMX_IN_FRONTEND;
-        pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER;
-        pesfilter.pes_type = type;
-        pesfilter.flags = DMX_IMMEDIATE_START;
-
-        if (ioctl(fd, DMX_SET_PES_FILTER, &pesfilter) < 0) {
-                PERROR ("ioctl(DMX_SET_PES_FILTER) for %s PID failed",
-                        type == DMX_PES_AUDIO ? "Audio" :
-                        type == DMX_PES_VIDEO ? "Video" : "??");
-                return -1;
-        }
-
-        return 0;
-}
-
-
-static
 int setup_frontend (int fe_fd, struct dvb_frontend_parameters *frontend)
 {
 	struct dvb_frontend_info fe_info;
@@ -503,6 +485,7 @@ static char *usage =
     "     -c file   : read channels list from 'file'\n"
     "     -x        : exit after tuning\n"
     "     -r        : set up /dev/dvb/adapterX/dvr0 for TS recording\n"
+    "     -p        : add pat and pmt to TS recording (implies -r)\n"
     "     -s        : only print summary\n"
     "     -S        : run silently (no output)\n"
     "     -H        : human readable output\n"
@@ -519,15 +502,16 @@ int main(int argc, char **argv)
 	char *confname = NULL;
 	char *channel = NULL;
 	int adapter = 0, frontend = 0, demux = 0, dvr = 0;
-	int vpid, apid;
+	int vpid, apid, sid, pmtpid = 0;
+	int pat_fd, pmt_fd;
 	int frontend_fd, audio_fd = 0, video_fd = 0, dvr_fd, file_fd;
 	int opt;
 	int record = 0;
 	int frontend_only = 0;
 	char *filename = NULL;
-	int human_readable = 0;
+	int human_readable = 0, rec_psi = 0;
 
-	while ((opt = getopt(argc, argv, "H?hrxRsFSn:a:f:d:c:t:o:")) != -1) {
+	while ((opt = getopt(argc, argv, "H?hrpxRsFSn:a:f:d:c:t:o:")) != -1) {
 		switch (opt) {
 		case 'a':
 			adapter = strtoul(optarg, NULL, 0);
@@ -548,6 +532,9 @@ int main(int argc, char **argv)
 		case 'r':
 			dvr = 1;
 			break;
+		case 'p':
+			rec_psi = 1;
+			break;
 		case 'x':
 			exit_after_tuning = 1;
 			break;
@@ -610,7 +597,7 @@ int main(int argc, char **argv)
 
 	memset(&frontend_param, 0, sizeof(struct dvb_frontend_parameters));
 
-	if (parse (confname, channel, &frontend_param, &vpid, &apid))
+	if (parse (confname, channel, &frontend_param, &vpid, &apid, &sid))
 		return -1;
 
 	if ((frontend_fd = open(FRONTEND_DEV, O_RDWR)) < 0) {
@@ -624,6 +611,28 @@ int main(int argc, char **argv)
 	if (frontend_only)
 		goto just_the_frontend_dude;
 
+	if (rec_psi) {
+	    pmtpid = get_pmt_pid(DEMUX_DEV, sid);
+	    if (pmtpid <= 0) {
+		fprintf(stderr,"couldn't find pmt-pid for sid %04x\n",sid);
+		return -1;
+	    }
+
+	    if ((pat_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
+		perror("opening pat demux failed");
+		return -1;
+	    }
+	    if (set_pesfilter(pat_fd, 0, DMX_PES_OTHER, dvr) < 0)
+		return -1;
+
+	    if ((pmt_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
+		perror("opening pmt demux failed");
+		return -1;
+	    }
+	    if (set_pesfilter(pmt_fd, pmtpid, DMX_PES_OTHER, dvr) < 0)
+		return -1;
+	}
+
         if ((video_fd = open(DEMUX_DEV, O_RDWR)) < 0) {
                 PERROR("failed opening '%s'", DEMUX_DEV);
                 return -1;
@@ -689,6 +698,8 @@ just_the_frontend_dude:
 		check_frontend (frontend_fd, human_readable);
 	}
 
+	close (pat_fd);
+	close (pmt_fd);
 	close (audio_fd);
 	close (video_fd);
 	close (frontend_fd);
diff --git a/util/szap/util.c b/util/szap/util.c
new file mode 100644
index 0000000..301d666
--- /dev/null
+++ b/util/szap/util.c
@@ -0,0 +1,126 @@
+/*
+ * util functions for various ?zap implementations
+ *
+ * Copyright (C) 2001 Johannes Stezenbach (js@convergence.de)
+ * for convergence integrated media
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include <linux/dvb/frontend.h>
+#include <linux/dvb/dmx.h>
+
+
+int set_pesfilter(int dmxfd, int pid, int pes_type, int dvr)
+{
+    struct dmx_pes_filter_params pesfilter;
+
+    /* ignore this pid to allow radio services */
+    if (pid < 0 ||
+	pid >= 0x1fff ||
+	(pid == 0 && pes_type != DMX_PES_OTHER))
+	return 0;
+
+    if (dvr) {
+	int buffersize = 64 * 1024;
+	if (ioctl(dmxfd, DMX_SET_BUFFER_SIZE, buffersize) == -1)
+	    perror("DMX_SET_BUFFER_SIZE failed");
+    }
+
+    pesfilter.pid = pid;
+    pesfilter.input = DMX_IN_FRONTEND;
+    pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER;
+    pesfilter.pes_type = pes_type;
+    pesfilter.flags = DMX_IMMEDIATE_START;
+
+    if (ioctl(dmxfd, DMX_SET_PES_FILTER, &pesfilter) == -1) {
+	fprintf(stderr, "DMX_SET_PES_FILTER failed "
+	"(PID = 0x%04x): %d %m\n", pid, errno);
+	return -1;
+    }
+
+    return 0;
+}
+
+
+int get_pmt_pid(char *dmxdev, int sid)
+{
+    int patfd, count;
+    int pmt_pid = 0;
+    int patread = 0;
+    int section_length;
+    unsigned char buft[4096];
+    unsigned char *buf = buft;
+    struct dmx_sct_filter_params f;
+
+    memset(&f, 0, sizeof(f));
+    f.pid = 0;
+    f.filter.filter[0] = 0x00;
+    f.filter.mask[0] = 0xff;
+    f.timeout = 0;
+    f.flags = DMX_IMMEDIATE_START | DMX_CHECK_CRC;
+
+    if ((patfd = open(dmxdev, O_RDWR)) < 0) {
+	perror("openening pat demux failed");
+	return -1;
+    }
+
+    if (ioctl(patfd, DMX_SET_FILTER, &f) == -1) {
+	perror("ioctl DMX_SET_FILTER failed");
+	close(patfd);
+	return -1;
+    }
+
+    while (!patread){
+	if (((count = read(patfd, buf, sizeof(buft))) < 0) && errno == EOVERFLOW)
+	    count = read(patfd, buf, sizeof(buft));
+	if (count < 0) {
+	    perror("read_sections: read error");
+	    close(patfd);
+	    return -1;
+	}
+	
+	section_length = ((buf[1] & 0x0f) << 8) | buf[2];
+	if (count != section_length + 3)
+	    continue;
+	
+	buf += 8;
+	section_length -= 8;
+	
+	patread = 1; /* assumes one section contains the whole pat */
+	while (section_length > 0) {
+	    int service_id = (buf[0] << 8) | buf[1];
+	    if (service_id == sid) {
+		pmt_pid = ((buf[2] & 0x1f) << 8) | buf[3];
+		section_length = 0;
+	    }
+	    buf += 4;
+	    section_length -= 4;
+	}
+    }
+
+    close(patfd);
+    return pmt_pid;
+}
diff --git a/util/szap/util.h b/util/szap/util.h
new file mode 100644
index 0000000..f4b7f12
--- /dev/null
+++ b/util/szap/util.h
@@ -0,0 +1,24 @@
+/*
+ * util functions for various ?zap implementations
+ *
+ * Copyright (C) 2001 Johannes Stezenbach (js@convergence.de)
+ * for convergence integrated media
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+int set_pesfilter(int dmxfd, int pid, int pes_type, int dvr);
+
+int get_pmt_pid(char *dmxdev, int sid);