Imported Debian patch 1.1.1+rev1355-1debian/1.1.1+rev1355-1

1 files changed, 1249 insertions, 0 deletions

diff --git a/util/atsc_epg/atsc_epg.c b/util/atsc_epg/atsc_epg.c
new file mode 100644
index 0000000..55e266d
--- /dev/null
+++ b/util/atsc_epg/atsc_epg.c
@@ -0,0 +1,1249 @@
+/*
+ * atsc_epg utility
+ *
+ * Copyright (C) 2009 Yufei Yuan <yfyuan@gmail.com>
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <time.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/poll.h>
+#include <errno.h>
+#include <getopt.h>
+#include <stdarg.h>
+#include <libdvbapi/dvbfe.h>
+#include <libdvbapi/dvbdemux.h>
+#include <libucsi/dvb/section.h>
+#include <libucsi/atsc/section.h>
+#include <libucsi/atsc/types.h>
+
+#define TIMEOUT				60
+#define RRT_TIMEOUT			60
+#define MAX_NUM_EVENT_TABLES		128
+#define TITLE_BUFFER_LEN		4096
+#define MESSAGE_BUFFER_LEN		(16 * 1024)
+#define MAX_NUM_CHANNELS		16
+#define MAX_NUM_EVENTS_PER_CHANNEL	(4 * 24 * 7)
+
+static int atsc_scan_table(int dmxfd, uint16_t pid, enum atsc_section_tag tag,
+	void **table_section);
+
+static const char *program;
+static int adapter = 0;
+static int period = 12; /* hours */
+static int frequency;
+static int enable_ett = 0;
+static int ctrl_c = 0;
+static const char *modulation = NULL;
+static char separator[80];
+void (*old_handler)(int);
+
+struct atsc_string_buffer {
+	int buf_len;
+	int buf_pos;
+	char *string;
+};
+
+struct atsc_event_info {
+	uint16_t id;
+	struct tm start;
+	struct tm end;
+	int title_pos;
+	int title_len;
+	int msg_pos;
+	int msg_len;
+};
+
+struct atsc_eit_section_info {
+	uint8_t section_num;
+	uint8_t num_events;
+	uint8_t num_etms;
+	uint8_t num_received_etms;
+	struct atsc_event_info **events;
+};
+
+struct atsc_eit_info {
+	int num_eit_sections;
+	struct atsc_eit_section_info *section;
+};
+
+struct atsc_channel_info {
+	uint8_t num_eits;
+	uint8_t service_type;
+	char short_name[8];
+	uint16_t major_num;
+	uint16_t minor_num;
+	uint16_t tsid;
+	uint16_t prog_num;
+	uint16_t src_id;
+	struct atsc_eit_info *eit;
+	struct atsc_event_info *last_event;
+	int event_info_index;
+	struct atsc_event_info e[MAX_NUM_EVENTS_PER_CHANNEL];
+	struct atsc_string_buffer title_buf;
+	struct atsc_string_buffer msg_buf;
+};
+
+struct atsc_virtual_channels_info {
+	int num_channels;
+	uint16_t eit_pid[MAX_NUM_EVENT_TABLES];
+	uint16_t ett_pid[MAX_NUM_EVENT_TABLES];
+	struct atsc_channel_info ch[MAX_NUM_CHANNELS];
+} guide;
+
+struct mgt_table_name {
+	uint16_t range;
+	const char *string;
+};
+
+struct mgt_table_name mgt_tab_name_array[] = {
+	{0x0000, "terrestrial VCT with current_next_indictor=1"},
+	{0x0001, "terrestrial VCT with current_next_indictor=0"},
+	{0x0002, "cable VCT with current_next_indictor=1"},
+	{0x0003, "cable VCT with current_next_indictor=0"},
+	{0x0004, "channel ETT"},
+	{0x0005, "DCCSCT"},
+	{0x00FF, "reserved for future ATSC use"},
+	{0x017F, "EIT"},
+	{0x01FF, "reserved for future ATSC use"},
+	{0x027F, "event ETT"},
+	{0x02FF, "reserved for future ATSC use"}, /* FIXME */
+	{0x03FF, "RRT with rating region"},
+	{0x0FFF, "user private"},
+	{0x13FF, "reserved for future ATSC use"},
+	{0x14FF, "DCCT with dcc_id"},
+	{0xFFFF, "reserved for future ATSC use"}
+};
+
+const char *channel_modulation_mode[] = {
+	"",
+	"analog",
+	"SCTE mode 1",
+	"SCTE mode 2",
+	"ATSC 8VSB",
+	"ATSC 16VSB"
+};
+
+const char *channel_service_type[] = {
+	"",
+	"analog TV",
+	"ATSC digital TV",
+	"ATSC audio",
+	"ATSC data-only"
+};
+
+void *(*table_callback[16])(struct atsc_section_psip *) =
+{
+	NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+	(void *(*)(struct atsc_section_psip *))atsc_mgt_section_codec,
+	(void *(*)(struct atsc_section_psip *))atsc_tvct_section_codec,
+	(void *(*)(struct atsc_section_psip *))atsc_cvct_section_codec,
+	(void *(*)(struct atsc_section_psip *))atsc_rrt_section_codec,
+	(void *(*)(struct atsc_section_psip *))atsc_eit_section_codec,
+	(void *(*)(struct atsc_section_psip *))atsc_ett_section_codec,
+	(void *(*)(struct atsc_section_psip *))atsc_stt_section_codec,
+	NULL, NULL
+};
+
+static void int_handler(int sig_num)
+{
+	if(SIGINT != sig_num) {
+		return;
+	}
+	ctrl_c = 1;
+}
+
+/* shamelessly stolen from dvbsnoop, but almost not modified */
+static uint32_t get_bits(const uint8_t *buf, int startbit, int bitlen)
+{
+	const uint8_t *b;
+	uint32_t mask,tmp_long;
+	int bitHigh,i;
+
+	b = &buf[startbit / 8];
+	startbit %= 8;
+
+	bitHigh = 8;
+	tmp_long = b[0];
+	for (i = 0; i < ((bitlen-1) >> 3); i++) {
+		tmp_long <<= 8;
+		tmp_long  |= b[i+1];
+		bitHigh   += 8;
+	}
+
+	startbit = bitHigh - startbit - bitlen;
+	tmp_long = tmp_long >> startbit;
+	mask     = (1ULL << bitlen) - 1;
+	return tmp_long & mask;
+}
+
+static void usage(void)
+{
+	fprintf(stderr, "usage: %s [-a <n>] -f <frequency> [-p <period>]"
+		" [-m <modulation>] [-t] [-h]\n", program);
+}
+
+static void help(void)
+{
+	fprintf(stderr,
+	"\nhelp:\n"
+	"%s [-a <n>] -f <frequency> [-p <period>] [-m <modulation>] [-t] [-h]\n"
+	"  -a: adapter index to use, (default 0)\n"
+	"  -f: tuning frequency\n"
+	"  -p: period in hours, (default 12)\n"
+	"  -m: modulation ATSC vsb_8|vsb_16 (default vsb_8)\n"
+	"  -t: enable ETT to receive program details, if available\n"
+	"  -h: display this message\n", program);
+}
+
+static int close_frontend(struct dvbfe_handle *fe)
+{
+	if(NULL == fe) {
+		fprintf(stderr, "%s(): NULL pointer detected\n", __FUNCTION__);
+	}
+
+	dvbfe_close(fe);
+
+	return 0;
+}
+
+static int open_frontend(struct dvbfe_handle **fe)
+{
+	struct dvbfe_info fe_info;
+
+	if(NULL == (*fe = dvbfe_open(adapter, 0, 0))) {
+		fprintf(stderr, "%s(): error calling dvbfe_open()\n",
+			__FUNCTION__);
+		return -1;
+	}
+	dvbfe_get_info(*fe, 0, &fe_info, DVBFE_INFO_QUERYTYPE_IMMEDIATE, 0);
+	if(DVBFE_TYPE_ATSC != fe_info.type) {
+		fprintf(stderr, "%s(): only ATSC frontend supported currently\n",
+			__FUNCTION__);
+		return -1;
+	}
+	fe_info.feparams.frequency = frequency;
+	fe_info.feparams.inversion = DVBFE_INVERSION_AUTO;
+	fe_info.feparams.u.atsc.modulation = DVBFE_ATSC_MOD_VSB_8;
+	fprintf(stdout, "tuning to %d Hz, please wait...\n", frequency);
+	if(dvbfe_set(*fe, &fe_info.feparams, TIMEOUT * 1000)) {
+		fprintf(stderr, "%s(): cannot lock to %d Hz in %d seconds\n",
+			__FUNCTION__, frequency, TIMEOUT);
+		return -1;
+	}
+	fprintf(stdout, "tuner locked.\n");
+
+	return 0;
+}
+
+#if ENABLE_RRT
+/* this is untested as since this part of the library is broken */
+static int parse_rrt(int dmxfd)
+{
+	const enum atsc_section_tag tag = stag_atsc_rating_region;
+	struct atsc_rrt_section *rrt;
+	struct atsc_text *region_name;
+	struct atsc_text_string *atsc_str;
+	int i, j, ret;
+
+	i = 0;
+	fprintf(stdout, "waiting for RRT: ");
+	fflush(stdout);
+	while(i < RRT_TIMEOUT) {
+		ret = atsc_scan_table(dmxfd, ATSC_BASE_PID, tag, (void **)&rrt);
+		if(0 > ret) {
+			fprintf(stderr, "%s(): error calling atsc_scan_table()\n",
+				__FUNCTION__);
+			return -1;
+		}
+		if(0 == ret) {
+			if(RRT_TIMEOUT > i) {
+				fprintf(stdout, ".");
+				fflush(stdout);
+			} else {
+				fprintf(stdout, "\nno RRT in %d seconds\n",
+					RRT_TIMEOUT);
+				return 0;
+			}
+			i += TIMEOUT;
+		} else {
+			fprintf(stdout, "\n");
+			fflush(stdout);
+			break;
+		}
+	}
+
+	region_name = atsc_rrt_section_rating_region_name_text(rrt);
+	atsc_text_strings_for_each(region_name, atsc_str, i) {
+		struct atsc_text_string_segment *seg;
+
+		atsc_text_string_segments_for_each(atsc_str, seg, j) {
+			const char *c;
+			int k;
+			if(seg->mode < 0x3E) {
+				fprintf(stderr, "%s(): text mode of 0x%02X "
+					"not supported yet\n",
+					__FUNCTION__, seg->mode);
+				return -1;
+			}
+			c = (const char *)atsc_text_string_segment_bytes(seg);
+			for(k = 0; k < seg->number_bytes; k++) {
+				fprintf(stdout, "%c", c[k]);
+			}
+		}
+	}
+
+	return 0;
+}
+#endif
+
+static int parse_stt(int dmxfd)
+{
+	const enum atsc_section_tag tag = stag_atsc_system_time;
+	const struct atsc_stt_section *stt;
+	time_t rx_time;
+	time_t sys_time;
+	int ret;
+
+	ret = atsc_scan_table(dmxfd, ATSC_BASE_PID, tag, (void **)&stt);
+	if(0 > ret) {
+		fprintf(stderr, "%s(): error calling atsc_scan_table()\n",
+			__FUNCTION__);
+		return -1;
+	}
+	if(0 == ret) {
+		fprintf(stdout, "no STT in %d seconds\n", TIMEOUT);
+		return 0;
+	}
+
+	rx_time = atsctime_to_unixtime(stt->system_time);
+	time(&sys_time);
+	fprintf(stdout, "system time: %s", ctime(&sys_time));
+	fprintf(stdout, "TS STT time: %s", ctime(&rx_time));
+
+	return 0;
+}
+
+static int parse_tvct(int dmxfd)
+{
+	int num_sections;
+	uint32_t section_pattern;
+	const enum atsc_section_tag tag = stag_atsc_terrestrial_virtual_channel;
+	struct atsc_tvct_section *tvct;
+	struct atsc_tvct_channel *ch;
+	struct atsc_channel_info *curr_info;
+	int i, k, ret;
+
+	section_pattern = 0;
+	num_sections = -1;
+
+	do {
+		ret = atsc_scan_table(dmxfd, ATSC_BASE_PID, tag, (void **)&tvct);
+		if(0 > ret) {
+			fprintf(stderr, "%s(): error calling atsc_scan_table()\n",
+			__FUNCTION__);
+			return -1;
+		}
+		if(0 == ret) {
+			fprintf(stdout, "no TVCT in %d seconds\n", TIMEOUT);
+			return 0;
+		}
+
+		if(-1 == num_sections) {
+			num_sections = 1 + tvct->head.ext_head.last_section_number;
+			if(32 < num_sections) {
+				fprintf(stderr, "%s(): no support yet for "
+					"tables having more than 32 sections\n",
+					__FUNCTION__);
+				return -1;
+			}
+		} else {
+			if(num_sections !=
+				1 + tvct->head.ext_head.last_section_number) {
+				fprintf(stderr,
+					"%s(): last section number does not match\n",
+					__FUNCTION__);
+				return -1;
+			}
+		}
+		if(section_pattern & (1 << tvct->head.ext_head.section_number)) {
+			continue;
+		}
+		section_pattern |= 1 << tvct->head.ext_head.section_number;
+
+		if(MAX_NUM_CHANNELS < guide.num_channels +
+			tvct->num_channels_in_section) {
+			fprintf(stderr, "%s(): no support for more than %d "
+				"virtual channels in a pyhsical channel\n",
+				__FUNCTION__, MAX_NUM_CHANNELS);
+			return -1;
+		}
+		curr_info = &guide.ch[guide.num_channels];
+		guide.num_channels += tvct->num_channels_in_section;
+
+	atsc_tvct_section_channels_for_each(tvct, ch, i) {
+		/* initialize the curr_info structure */
+		/* each EIT covers 3 hours */
+		curr_info->num_eits = (period / 3) + !!(period % 3);
+		while (curr_info->num_eits &&
+			(0xFFFF == guide.eit_pid[curr_info->num_eits - 1])) {
+			curr_info->num_eits -= 1;
+		}
+		if(curr_info->eit) {
+			fprintf(stderr, "%s(): non-NULL pointer detected "
+				"during initialization", __FUNCTION__);
+			return -1;
+		}
+		if(NULL == (curr_info->eit = calloc(curr_info->num_eits,
+			sizeof(struct atsc_eit_info)))) {
+			fprintf(stderr, "%s(): error calling calloc()\n",
+				__FUNCTION__);
+			return -1;
+		}
+		if(NULL == (curr_info->title_buf.string = calloc(TITLE_BUFFER_LEN,
+			sizeof(char)))) {
+			fprintf(stderr, "%s(): error calling calloc()\n",
+				__FUNCTION__);
+			return -1;
+		}
+		curr_info->title_buf.buf_len = TITLE_BUFFER_LEN;
+		curr_info->title_buf.buf_pos = 0;
+
+		if(NULL == (curr_info->msg_buf.string = calloc(MESSAGE_BUFFER_LEN,
+			sizeof(char)))) {
+			fprintf(stderr, "%s(): error calling calloc()\n",
+				__FUNCTION__);
+			return -1;
+		}
+		curr_info->msg_buf.buf_len = MESSAGE_BUFFER_LEN;
+		curr_info->msg_buf.buf_pos = 0;
+
+		for(k = 0; k < 7; k++) {
+			curr_info->short_name[k] =
+				get_bits((const uint8_t *)ch->short_name,
+				k * 16, 16);
+		}
+		curr_info->service_type = ch->service_type;
+		curr_info->major_num = ch->major_channel_number;
+		curr_info->minor_num = ch->minor_channel_number;
+		curr_info->tsid = ch->channel_TSID;
+		curr_info->prog_num = ch->program_number;
+		curr_info->src_id = ch->source_id;
+		curr_info++;
+		}
+	} while(section_pattern != (uint32_t)((1 << num_sections) - 1));
+
+	return 0;
+}
+
+static int match_event(struct atsc_eit_info *eit, uint16_t event_id,
+	struct atsc_event_info **event, uint8_t *curr_index)
+{
+	int j, k;
+	struct atsc_eit_section_info *section;
+
+	if(NULL == eit || NULL == event || NULL == curr_index) {
+		fprintf(stderr, "%s(): NULL pointer detected\n", __FUNCTION__);
+		return -1;
+	}
+
+	for(j = 0; j < eit->num_eit_sections; j++) {
+		section = &eit->section[j];
+
+		for(k = 0; k < section->num_events; k++) {
+			if(section->events[k] && section->events[k]->id ==
+				event_id) {
+				*event = section->events[k];
+				break;
+			}
+		}
+		if(*event) {
+			*curr_index = j;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static int parse_message(struct atsc_channel_info *channel,
+	struct atsc_ett_section *ett, struct atsc_event_info *event)
+{
+	int i, j;
+	struct atsc_text *text;
+	struct atsc_text_string *str;
+
+	if(NULL == ett || NULL == event || NULL == channel) {
+		fprintf(stderr, "%s(): NULL pointer detected\n", __FUNCTION__);
+		return -1;
+	}
+
+	text = atsc_ett_section_extended_text_message(ett);
+	atsc_text_strings_for_each(text, str, i) {
+		struct atsc_text_string_segment *seg;
+
+		atsc_text_string_segments_for_each(str, seg, j) {
+			event->msg_pos = channel->msg_buf.buf_pos;
+			if(0 > atsc_text_segment_decode(seg,
+				(uint8_t **)&channel->msg_buf.string,
+				(size_t *)&channel->msg_buf.buf_len,
+				(size_t *)&channel->msg_buf.buf_pos)) {
+				fprintf(stderr, "%s(): error calling "
+					"atsc_text_segment_decode()\n",
+					__FUNCTION__);
+				return -1;
+			}
+			event->msg_len = 1 + channel->msg_buf.buf_pos -
+				event->msg_pos;
+		}
+	}
+
+	return 0;
+}
+
+static int parse_ett(int dmxfd, int index, uint16_t pid)
+{
+	uint8_t curr_index;
+	uint32_t section_pattern;
+	const enum atsc_section_tag tag = stag_atsc_extended_text;
+	struct atsc_eit_info *eit;
+	struct atsc_ett_section *ett;
+	struct atsc_channel_info *channel;
+	struct atsc_event_info *event;
+	struct atsc_eit_section_info *section;
+	uint16_t source_id, event_id;
+	int c, ret;
+
+	if(0xFFFF == guide.ett_pid[index]) {
+		return 0;
+	}
+
+	for(c = 0; c < guide.num_channels; c++) {
+		channel = &guide.ch[c];
+		eit = &channel->eit[index];
+
+		section_pattern = 0;
+		while(section_pattern !=
+			(uint32_t)((1 << eit->num_eit_sections) - 1)) {
+			if(ctrl_c) {
+				return 0;
+			}
+			ret = atsc_scan_table(dmxfd, pid, tag, (void **)&ett);
+			fprintf(stdout, ".");
+			fflush(stdout);
+			if(0 > ret) {
+				fprintf(stderr, "%s(): error calling "
+					"atsc_scan_table()\n", __FUNCTION__);
+				return -1;
+			}
+			if(0 == ret) {
+				fprintf(stdout, "no ETT %d in %d seconds\n",
+					index, TIMEOUT);
+				return 0;
+			}
+
+			source_id = ett->ETM_source_id;
+			event_id = ett->ETM_sub_id;
+			if(source_id != channel->src_id) {
+				continue;
+			}
+
+			event = NULL;
+			if(match_event(eit, event_id, &event, &curr_index)) {
+				fprintf(stderr, "%s(): error calling "
+					"match_event()\n", __FUNCTION__);
+				return -1;
+			}
+			if(NULL == event) {
+				continue;
+			}
+			if(section_pattern & (1 << curr_index)) {
+				/* the section has been filled, so skip,
+				 * not consider version yet
+				 */
+				continue;
+			}
+			if(event->msg_len) {
+				/* the message has been filled */
+				continue;
+			}
+
+			if(parse_message(channel, ett, event)) {
+				fprintf(stderr, "%s(): error calling "
+					"parse_message()\n", __FUNCTION__);
+				return -1;
+			}
+			section = &eit->section[curr_index];
+			if(++section->num_received_etms == section->num_etms) {
+				section_pattern |= 1 << curr_index;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int parse_events(struct atsc_channel_info *curr_info,
+	struct atsc_eit_section *eit, struct atsc_eit_section_info *section)
+{
+	int i, j, k;
+	struct atsc_eit_event *e;
+	time_t start_time, end_time;
+
+	if(NULL == curr_info || NULL == eit) {
+		fprintf(stderr, "%s(): NULL pointer detected\n", __FUNCTION__);
+		return -1;
+	}
+
+	atsc_eit_section_events_for_each(eit, e, i) {
+		struct atsc_text *title;
+		struct atsc_text_string *str;
+		struct atsc_event_info *e_info =
+			&curr_info->e[curr_info->event_info_index];
+
+		if(0 == i && curr_info->last_event) {
+			if(e->event_id == curr_info->last_event->id) {
+				section->events[i] = NULL;
+				/* skip if it's the same event spanning
+				 * over sections
+				 */
+				continue;
+			}
+		}
+		curr_info->event_info_index += 1;
+		section->events[i] = e_info;
+		e_info->id = e->event_id;
+		start_time = atsctime_to_unixtime(e->start_time);
+		end_time = start_time + e->length_in_seconds;
+		localtime_r(&start_time, &e_info->start);
+		localtime_r(&end_time, &e_info->end);
+		if(0 != e->ETM_location && 3 != e->ETM_location) {
+			/* FIXME assume 1 and 2 is interchangable as of now */
+			section->num_etms++;
+		}
+
+		title = atsc_eit_event_name_title_text(e);
+		atsc_text_strings_for_each(title, str, j) {
+			struct atsc_text_string_segment *seg;
+
+			atsc_text_string_segments_for_each(str, seg, k) {
+				e_info->title_pos = curr_info->title_buf.buf_pos;
+				if(0 > atsc_text_segment_decode(seg,
+					(uint8_t **)&curr_info->title_buf.string,
+					(size_t *)&curr_info->title_buf.buf_len,
+					(size_t *)&curr_info->title_buf.buf_pos)) {
+					fprintf(stderr, "%s(): error calling "
+						"atsc_text_segment_decode()\n",
+						__FUNCTION__);
+					return -1;
+				}
+				e_info->title_len = curr_info->title_buf.buf_pos -
+					e_info->title_pos + 1;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int parse_eit(int dmxfd, int index, uint16_t pid)
+{
+	int num_sections;
+	uint8_t section_num;
+	uint8_t curr_channel_index;
+	uint32_t section_pattern;
+	const enum atsc_section_tag tag = stag_atsc_event_information;
+	struct atsc_eit_section *eit;
+	struct atsc_channel_info *curr_info;
+	struct atsc_eit_info *eit_info;
+	struct atsc_eit_section_info *section;
+	uint16_t source_id;
+	uint32_t eit_instance_pattern = 0;
+	int i, k, ret;
+
+	while(eit_instance_pattern !=
+		(uint32_t)((1 << guide.num_channels) - 1)) {
+		source_id = 0xFFFF;
+		section_pattern = 0;
+		num_sections = -1;
+
+		do {
+			ret = atsc_scan_table(dmxfd, pid, tag, (void **)&eit);
+			fprintf(stdout, ".");
+			fflush(stdout);
+			if(0 > ret) {
+				fprintf(stderr, "%s(): error calling "
+					"atsc_scan_table()\n", __FUNCTION__);
+				return -1;
+			}
+			if(0 == ret) {
+				fprintf(stdout, "no EIT %d in %d seconds\n",
+					index, TIMEOUT);
+				return 0;
+			}
+
+			if(0xFFFF == source_id) {
+			source_id = atsc_eit_section_source_id(eit);
+			for(k = 0; k < guide.num_channels; k++) {
+				if(source_id == guide.ch[k].src_id) {
+					curr_info = &guide.ch[k];
+					curr_channel_index = k;
+					if(0 == index) {
+						curr_info->last_event = NULL;
+					}
+					break;
+				}
+			}
+			if(k == guide.num_channels) {
+				fprintf(stderr, "%s(): cannot find source_id "
+					"0x%04X in the EIT\n",
+					__FUNCTION__, source_id);
+				return -1;
+			}
+			} else {
+				if(source_id !=
+					atsc_eit_section_source_id(eit)) {
+					continue;
+				}
+			}
+			if(eit_instance_pattern & (1 << curr_channel_index)) {
+				/* we have received this instance,
+				 * so quit quick
+				 */
+				break;
+			}
+
+			if(-1 == num_sections) {
+				num_sections = 1 +
+					eit->head.ext_head.last_section_number;
+				if(32 < num_sections) {
+					fprintf(stderr,
+						"%s(): no support yet for "
+						"tables having more than "
+						"32 sections\n", __FUNCTION__);
+					return -1;
+				}
+			} else {
+				if(num_sections != 1 +
+					eit->head.ext_head.last_section_number) {
+					fprintf(stderr,
+						"%s(): last section number "
+						"does not match\n",
+						__FUNCTION__);
+					return -1;
+				}
+			}
+			if(section_pattern &
+				(1 << eit->head.ext_head.section_number)) {
+				continue;
+			}
+			section_pattern |= 1 << eit->head.ext_head.section_number;
+
+			eit_info = &curr_info->eit[index];
+			if(NULL == (eit_info->section =
+				realloc(eit_info->section,
+				(eit_info->num_eit_sections + 1) *
+				sizeof(struct atsc_eit_section_info)))) {
+				fprintf(stderr,
+					"%s(): error calling realloc()\n",
+					__FUNCTION__);
+				return -1;
+			}
+			section_num = eit->head.ext_head.section_number;
+			if(0 == eit_info->num_eit_sections) {
+				eit_info->num_eit_sections = 1;
+				section = eit_info->section;
+			} else {
+				/* have to sort it into section order
+				 * (temporal order)
+				 */
+				for(i = 0; i < eit_info->num_eit_sections; i++) {
+					if(eit_info->section[i].section_num >
+						section_num) {
+						break;
+					}
+				}
+				memmove(&eit_info->section[i + 1],
+					&eit_info->section[i],
+					(eit_info->num_eit_sections - i) *
+					sizeof(struct atsc_eit_section_info));
+				section = &eit_info->section[i - 1];
+				section = &eit_info->section[i];
+				eit_info->num_eit_sections += 1;
+			}
+
+			section->section_num = section_num;
+			section->num_events = eit->num_events_in_section;
+			section->num_etms = 0;
+			section->num_received_etms = 0;
+			if(NULL == (section->events = calloc(section->num_events,
+				sizeof(struct atsc_event_info *)))) {
+				fprintf(stderr, "%s(): error calling calloc()\n",
+					__FUNCTION__);
+				return -1;
+			}
+			if(parse_events(curr_info, eit, section)) {
+				fprintf(stderr, "%s(): error calling "
+					"parse_events()\n", __FUNCTION__);
+				return -1;
+			}
+		} while(section_pattern != (uint32_t)((1 << num_sections) - 1));
+		eit_instance_pattern |= 1 << curr_channel_index;
+	}
+
+	for(i = 0; i < guide.num_channels; i++) {
+		struct atsc_channel_info *channel = &guide.ch[i];
+		struct atsc_eit_info *ei = &channel->eit[index];
+		struct atsc_eit_section_info *s;
+
+		if(0 == ei->num_eit_sections) {
+			channel->last_event = NULL;
+			continue;
+		}
+		s = &ei->section[ei->num_eit_sections - 1];
+		/* BUG: it's incorrect when last section has no event */
+		if(0 == s->num_events) {
+			channel->last_event = NULL;
+			continue;
+		}
+		channel->last_event = s->events[s->num_events - 1];
+	}
+
+	return 0;
+}
+
+static int parse_mgt(int dmxfd)
+{
+	const enum atsc_section_tag tag = stag_atsc_master_guide;
+	struct atsc_mgt_section *mgt;
+	struct atsc_mgt_table *t;
+	int i, j, ret;
+
+	ret = atsc_scan_table(dmxfd, ATSC_BASE_PID, tag, (void **)&mgt);
+	if(0 > ret) {
+		fprintf(stderr, "%s(): error calling atsc_scan_table()\n",
+			__FUNCTION__);
+		return -1;
+	}
+	if(0 == ret) {
+		fprintf(stdout, "no MGT in %d seconds\n", TIMEOUT);
+		return 0;
+	}
+
+	fprintf(stdout, "MGT table:\n");
+	atsc_mgt_section_tables_for_each(mgt, t, i) {
+		struct mgt_table_name table;
+
+	for(j = 0; j < (int)(sizeof(mgt_tab_name_array) /
+		sizeof(struct mgt_table_name)); j++) {
+		if(t->table_type > mgt_tab_name_array[j].range) {
+			continue;
+		}
+		table = mgt_tab_name_array[j];
+		if(0 == j || mgt_tab_name_array[j - 1].range + 1 ==
+			mgt_tab_name_array[j].range) {
+			j = -1;
+		} else {
+			j = t->table_type - mgt_tab_name_array[j - 1].range - 1;
+			if(0x017F == table.range) {
+				guide.eit_pid[j] = t->table_type_PID;
+			} else if (0x027F == table.range) {
+				guide.ett_pid[j] = t->table_type_PID;
+			}
+		}
+		break;
+	}
+
+		fprintf(stdout, "  %2d: type = 0x%04X, PID = 0x%04X, %s", i,
+		    t->table_type, t->table_type_PID, table.string);
+		if(-1 != j) {
+		    fprintf(stdout, " %d", j);
+		}
+		fprintf(stdout, "\n");
+	}
+
+	return 0;
+}
+
+static int cleanup_guide(void)
+{
+	int i, j, k;
+
+	for(i = 0; i < guide.num_channels; i++) {
+		struct atsc_channel_info *channel = &guide.ch[i];
+
+		if(channel->title_buf.string) {
+			free(channel->title_buf.string);
+		}
+		if(channel->msg_buf.string) {
+			free(channel->msg_buf.string);
+		}
+		for(j = 0; j < channel->num_eits; j++) {
+			struct atsc_eit_info *eit = &channel->eit[j];
+
+			for(k = 0; k < eit->num_eit_sections; k++) {
+				struct atsc_eit_section_info *section =
+					&eit->section[k];
+				if(section->num_events) {
+					free(section->events);
+				}
+			}
+			if(k) {
+				free(eit->section);
+			}
+		}
+		if(j) {
+			free(channel->eit);
+		}
+	}
+
+	return 0;
+}
+
+static int print_events(struct atsc_channel_info *channel,
+	struct atsc_eit_section_info *section)
+{
+	int m;
+	char line[256];
+
+	if(NULL == section) {
+		fprintf(stderr, "%s(): NULL pointer detected", __FUNCTION__);
+		return -1;
+	}
+	for(m = 0; m < section->num_events; m++) {
+		struct atsc_event_info *event =
+			section->events[m];
+
+		if(NULL == event) {
+			continue;
+		}
+		fprintf(stdout, "|%02d:%02d--%02d:%02d| ",
+			event->start.tm_hour, event->start.tm_min,
+			event->end.tm_hour, event->end.tm_min);
+		snprintf(line, event->title_len, "%s",
+			&channel->title_buf.string[event->title_pos]);
+		line[event->title_len] = '\0';
+		fprintf(stdout, "%s\n", line);
+		if(event->msg_len) {
+			int len = event->msg_len;
+			int pos = event->msg_pos;
+			size_t part;
+
+			do {
+				part = len > 255 ? 255 : len;
+				snprintf(line, part, "%s",
+					&channel->msg_buf.string[pos]);
+				line[part] = '\0';
+				fprintf(stdout, "%s", line);
+				len -= part;
+				pos += part;
+			} while(0 < len);
+			fprintf(stdout, "\n");
+		}
+	}
+	return 0;
+}
+
+static int print_guide(void)
+{
+	int i, j, k;
+
+	fprintf(stdout, "%s\n", separator);
+	for(i = 0; i < guide.num_channels; i++) {
+		struct atsc_channel_info *channel = &guide.ch[i];
+
+		fprintf(stdout, "%d.%d  %s\n", channel->major_num,
+			channel->minor_num, channel->short_name);
+		for(j = 0; j < channel->num_eits; j++) {
+			struct atsc_eit_info *eit = &channel->eit[j];
+
+			for(k = 0; k < eit->num_eit_sections; k++) {
+				struct atsc_eit_section_info *section =
+					&eit->section[k];
+				if(print_events(channel, section)) {
+					fprintf(stderr, "%s(): error calling "
+						"print_events()\n", __FUNCTION__);
+					return -1;
+				}
+			}
+		}
+		fprintf(stdout, "%s\n", separator);
+	}
+
+	return 0;
+}
+
+static int open_demux(int *dmxfd)
+{
+	if((*dmxfd = dvbdemux_open_demux(adapter, 0, 0)) < 0) {
+		fprintf(stderr, "%s(): error calling dvbdemux_open_demux()\n",
+			__FUNCTION__);
+		return -1;
+	}
+	return 0;
+}
+
+static int close_demux(int dmxfd)
+{
+	if(dvbdemux_stop(dmxfd)) {
+		fprintf(stderr, "%s(): error calling dvbdemux_stop()\n",
+			__FUNCTION__);
+		return -1;
+	}
+	return 0;
+}
+
+/* used other utilities as template and generalized here */
+static int atsc_scan_table(int dmxfd, uint16_t pid, enum atsc_section_tag tag,
+	void **table_section)
+{
+	uint8_t filter[18];
+	uint8_t mask[18];
+	unsigned char sibuf[4096];
+	int size;
+	int ret;
+	struct pollfd pollfd;
+	struct section *section;
+	struct section_ext *section_ext;
+	struct atsc_section_psip *psip;
+
+	/* create a section filter for the table */
+	memset(filter, 0, sizeof(filter));
+	memset(mask, 0, sizeof(mask));
+	filter[0] = tag;
+	mask[0] = 0xFF;
+	if(dvbdemux_set_section_filter(dmxfd, pid, filter, mask, 1, 1)) {
+		fprintf(stderr, "%s(): error calling atsc_scan_table()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	/* poll for data */
+	pollfd.fd = dmxfd;
+	pollfd.events = POLLIN | POLLERR |POLLPRI;
+	if((ret = poll(&pollfd, 1, TIMEOUT * 1000)) < 0) {
+		if(ctrl_c) {
+			return 0;
+		}
+		fprintf(stderr, "%s(): error calling poll()\n", __FUNCTION__);
+		return -1;
+	}
+
+	if(0 == ret) {
+		return 0;
+	}
+
+	/* read it */
+	if((size = read(dmxfd, sibuf, sizeof(sibuf))) < 0) {
+		fprintf(stderr, "%s(): error calling read()\n", __FUNCTION__);
+		return -1;
+	}
+
+	/* parse section */
+	section = section_codec(sibuf, size);
+	if(NULL == section) {
+		fprintf(stderr, "%s(): error calling section_codec()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	section_ext = section_ext_decode(section, 0);
+	if(NULL == section_ext) {
+		fprintf(stderr, "%s(): error calling section_ext_decode()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	psip = atsc_section_psip_decode(section_ext);
+	if(NULL == psip) {
+		fprintf(stderr,
+			"%s(): error calling atsc_section_psip_decode()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	*table_section = table_callback[tag & 0x0F](psip);
+	if(NULL == *table_section) {
+		fprintf(stderr, "%s(): error decode table section\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	return 1;
+}
+
+int main(int argc, char *argv[])
+{
+	int i, dmxfd;
+	struct dvbfe_handle *fe;
+
+	program = argv[0];
+
+	if(1 == argc) {
+		usage();
+		exit(-1);
+	}
+
+	for( ; ; ) {
+		char c;
+
+		if(-1 == (c = getopt(argc, argv, "a:f:p:m:th"))) {
+			break;
+		}
+
+		switch(c) {
+		case 'a':
+			adapter = strtoll(optarg, NULL, 0);
+			break;
+
+		case 'f':
+			frequency = strtol(optarg, NULL, 0);
+			break;
+
+		case 'p':
+			period = strtol(optarg, NULL, 0);
+			/* each table covers 3 hours */
+			if((3 * MAX_NUM_EVENT_TABLES) < period) {
+				period = 3 * MAX_NUM_EVENT_TABLES;
+			}
+			break;
+
+		case 'm':
+			/* just stub, so far ATSC only has VSB_8 */
+			modulation = optarg;
+			break;
+
+		case 't':
+			enable_ett = 1;
+			break;
+
+		case 'h':
+			help();
+			exit(0);
+
+		default:
+			usage();
+			exit(-1);
+		}
+	}
+
+	memset(separator, '-', sizeof(separator));
+	separator[79] = '\0';
+	memset(&guide, 0, sizeof(struct atsc_virtual_channels_info));
+	memset(guide.eit_pid, 0xFF, MAX_NUM_EVENT_TABLES * sizeof(uint16_t));
+	memset(guide.ett_pid, 0xFF, MAX_NUM_EVENT_TABLES * sizeof(uint16_t));
+
+	if(open_frontend(&fe)) {
+		fprintf(stderr, "%s(): error calling open_frontend()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	if(open_demux(&dmxfd)) {
+		fprintf(stderr, "%s(): error calling open_demux()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	if(parse_stt(dmxfd)) {
+		fprintf(stderr, "%s(): error calling parse_stt()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	if(parse_mgt(dmxfd)) {
+		fprintf(stderr, "%s(): error calling parse_mgt()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	if(parse_tvct(dmxfd)) {
+		fprintf(stderr, "%s(): error calling parse_tvct()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+#ifdef ENABLE_RRT
+	if(parse_rrt(dmxfd)) {
+		fprintf(stderr, "%s(): error calling parse_rrt()\n",
+			__FUNCTION__);
+		return -1;
+	}
+#endif
+
+	fprintf(stdout, "receiving EIT ");
+	for(i = 0; i < guide.ch[0].num_eits; i++) {
+		if(parse_eit(dmxfd, i, guide.eit_pid[i])) {
+			fprintf(stderr, "%s(): error calling parse_eit()\n",
+				__FUNCTION__);
+			return -1;
+		}
+	}
+	fprintf(stdout, "\n");
+
+	old_handler = signal(SIGINT, int_handler);
+	if(enable_ett) {
+		fprintf(stdout, "receiving ETT ");
+		for(i = 0; i < guide.ch[0].num_eits; i++) {
+			if(0xFFFF != guide.ett_pid[i]) {
+				if(parse_ett(dmxfd, i, guide.ett_pid[i])) {
+					fprintf(stderr, "%s(): error calling "
+						"parse_eit()\n", __FUNCTION__);
+					return -1;
+				}
+			}
+			if(ctrl_c) {
+				break;
+			}
+		}
+		fprintf(stdout, "\n");
+	}
+	signal(SIGINT, old_handler);
+
+	if(print_guide()) {
+		fprintf(stderr, "%s(): error calling print_guide()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	if(cleanup_guide()) {
+		fprintf(stderr, "%s(): error calling cleanup_guide()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	if(close_demux(dmxfd)) {
+		fprintf(stderr, "%s(): error calling close_demux()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	if(close_frontend(fe)) {
+		fprintf(stderr, "%s(): error calling close_demux()\n",
+			__FUNCTION__);
+		return -1;
+	}
+
+	return 0;
+}