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-rw-r--r--util/atsc_epg/Makefile16
-rw-r--r--util/atsc_epg/README12
-rw-r--r--util/atsc_epg/atsc_epg.c1249
3 files changed, 1277 insertions, 0 deletions
diff --git a/util/atsc_epg/Makefile b/util/atsc_epg/Makefile
new file mode 100644
index 0000000..747e2b8
--- /dev/null
+++ b/util/atsc_epg/Makefile
@@ -0,0 +1,16 @@
+# Makefile for linuxtv.org dvb-apps/util/atsc_epg
+
+binaries = atsc_epg
+
+inst_bin = $(binaries)
+
+CPPFLAGS += -I../../lib -std=c99 -D_POSIX_SOURCE
+#LDFLAGS += -static -L../../lib/libdvbapi -L../../lib/libucsi
+LDFLAGS += -L../../lib/libdvbapi -L../../lib/libucsi
+LDLIBS += -ldvbapi -lucsi
+
+.PHONY: all
+
+all: $(binaries)
+
+include ../../Make.rules
diff --git a/util/atsc_epg/README b/util/atsc_epg/README
new file mode 100644
index 0000000..6a82453
--- /dev/null
+++ b/util/atsc_epg/README
@@ -0,0 +1,12 @@
+Hi there,
+
+atsc_epg is a small utility for obtaining information such as programs, EPG
+(electronic program guide) from an ATSC channel.
+
+Pulling the detailed information, i.e., option '-t', may take fairly long
+time, or never ending, which is a bug of the PSIP generator. Ctrl+C can be
+used to abort and the received parts will be printed.
+
+Enjoy,
+Yufei
+
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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 01:59:44 +0000