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authorAndré Roth <neolynx@gmail.com>2014-01-08 08:23:28 -0300
committerMauro Carvalho Chehab <m.chehab@samsung.com>2014-01-08 06:44:55 -0200
commitd45b989282d5c45cfe58eb842d2ece608ba3277c (patch)
treee17379fda2d8d3690b007e31a9a41a15d979b48d
parent130c5c9001553b7776718266b4c9789d468d8c4a (diff)
libdvbv5: implement ATSC EIT
ATSC has a different EIT table then DVB. This implements the parser according to secifications defined in A/65:2009. Signed-off-by: André Roth <neolynx@gmail.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
-rw-r--r--lib/include/descriptors/atsc_eit.h90
-rw-r--r--lib/libdvbv5/Makefile.am4
-rw-r--r--lib/libdvbv5/descriptors.c1
-rw-r--r--lib/libdvbv5/descriptors/atsc_eit.c170
4 files changed, 264 insertions, 1 deletions
diff --git a/lib/include/descriptors/atsc_eit.h b/lib/include/descriptors/atsc_eit.h
new file mode 100644
index 00000000..3bc5df68
--- /dev/null
+++ b/lib/include/descriptors/atsc_eit.h
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2013 - Andre Roth <neolynx@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 version 2
+ * of the License.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ *
+ */
+
+#ifndef _ATSC_EIT_H
+#define _ATSC_EIT_H
+
+#include <stdint.h>
+#include <unistd.h> /* ssize_t */
+#include <time.h>
+
+#include "descriptors/atsc_header.h"
+#include "descriptors.h"
+
+#define ATSC_TABLE_EIT 0xCB
+
+struct atsc_table_eit_event {
+ union {
+ uint16_t bitfield;
+ struct {
+ uint16_t event_id:14;
+ uint16_t one:2;
+ } __attribute__((packed));
+ } __attribute__((packed));
+ uint32_t start_time;
+ union {
+ uint32_t bitfield2;
+ struct {
+ uint32_t title_length:8;
+ uint32_t duration:20;
+ uint32_t etm:2;
+ uint32_t one2:2;
+ uint32_t :2;
+ } __attribute__((packed));
+ } __attribute__((packed));
+ struct dvb_desc *descriptor;
+ struct atsc_table_eit_event *next;
+ struct tm start;
+ uint16_t source_id;
+} __attribute__((packed));
+
+union atsc_table_eit_desc_length {
+ uint16_t bitfield;
+ struct {
+ uint16_t desc_length:12;
+ uint16_t reserved:4;
+ } __attribute__((packed));
+} __attribute__((packed));
+
+struct atsc_table_eit {
+ struct atsc_table_header header;
+ uint8_t events;
+ struct atsc_table_eit_event *event;
+} __attribute__((packed));
+
+#define atsc_eit_event_foreach(_event, _eit) \
+ for( struct atsc_table_eit_event *_event = _eit->event; _event; _event = _event->next ) \
+
+struct dvb_v5_fe_parms;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void atsc_table_eit_init (struct dvb_v5_fe_parms *parms, const uint8_t *buf, ssize_t buflen, uint8_t *table, ssize_t *table_length);
+void atsc_table_eit_free(struct atsc_table_eit *eit);
+void atsc_table_eit_print(struct dvb_v5_fe_parms *parms, struct atsc_table_eit *eit);
+void atsc_time(const uint32_t start_time, struct tm *tm);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/libdvbv5/Makefile.am b/lib/libdvbv5/Makefile.am
index 44f68d48..c6d2a420 100644
--- a/lib/libdvbv5/Makefile.am
+++ b/lib/libdvbv5/Makefile.am
@@ -48,8 +48,10 @@ libdvbv5_la_SOURCES = \
descriptors/nit.c ../include/descriptors/nit.h \
descriptors/sdt.c ../include/descriptors/sdt.h \
descriptors/vct.c ../include/descriptors/vct.h \
- descriptors/eit.c ../include/descriptors/eit.h \
+ descriptors/atsc_header.c ../include/descriptors/atsc_header.h \
descriptors/mgt.c ../include/descriptors/mgt.h \
+ descriptors/eit.c ../include/descriptors/eit.h \
+ descriptors/atsc_eit.c ../include/descriptors/atsc_eit.h
libdvbv5_la_CPPFLAGS = $(ENFORCE_LIBDVBV5_STATIC)
libdvbv5_la_LDFLAGS = $(LIBDVBV5_VERSION) $(ENFORCE_LIBDVBV5_STATIC) -lm
diff --git a/lib/libdvbv5/descriptors.c b/lib/libdvbv5/descriptors.c
index 73850278..aeace36a 100644
--- a/lib/libdvbv5/descriptors.c
+++ b/lib/libdvbv5/descriptors.c
@@ -37,6 +37,7 @@
#include "descriptors/eit.h"
#include "descriptors/vct.h"
#include "descriptors/mgt.h"
+#include "descriptors/atsc_eit.h"
#include "descriptors/desc_language.h"
#include "descriptors/desc_network_name.h"
#include "descriptors/desc_cable_delivery.h"
diff --git a/lib/libdvbv5/descriptors/atsc_eit.c b/lib/libdvbv5/descriptors/atsc_eit.c
new file mode 100644
index 00000000..f8afc764
--- /dev/null
+++ b/lib/libdvbv5/descriptors/atsc_eit.c
@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2013 - Andre Roth <neolynx@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 version 2
+ * of the License.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ *
+ */
+
+#include "descriptors/atsc_eit.h"
+#include "dvb-fe.h"
+
+void atsc_table_eit_init(struct dvb_v5_fe_parms *parms, const uint8_t *buf, ssize_t buflen, uint8_t *table, ssize_t *table_length)
+{
+ const uint8_t *p = buf, *endbuf = buf + buflen - 4; /* minus CRC */;
+ struct atsc_table_eit *eit = (struct atsc_table_eit *) table;
+ struct atsc_table_eit_event **head;
+ int i = 0;
+ struct atsc_table_eit_event *last = NULL;
+ size_t size = offsetof(struct atsc_table_eit, event);
+
+ if (p + size > endbuf) {
+ dvb_logerr("%s: short read %zd/%zd bytes", __func__,
+ size, endbuf - p);
+ return;
+ }
+
+ if (*table_length > 0) {
+ memcpy(eit, p, size);
+
+ /* find end of curent list */
+ head = &eit->event;
+ while (*head != NULL)
+ head = &(*head)->next;
+ } else {
+ memcpy(eit, p, size);
+ *table_length = sizeof(struct atsc_table_eit);
+
+ eit->event = NULL;
+ head = &eit->event;
+ }
+ p += size;
+
+ while (i++ < eit->events && p < endbuf) {
+ struct atsc_table_eit_event *event;
+ union atsc_table_eit_desc_length dl;
+
+ size = offsetof(struct atsc_table_eit_event, descriptor);
+ if (p + size > endbuf) {
+ dvb_logerr("%s: short read %zd/%zd bytes", __func__,
+ size, endbuf - p);
+ return;
+ }
+ event = (struct atsc_table_eit_event *) malloc(sizeof(struct atsc_table_eit_event));
+ memcpy(event, p, size);
+ p += size;
+
+ bswap16(event->bitfield);
+ bswap32(event->start_time);
+ bswap32(event->bitfield2);
+ event->descriptor = NULL;
+ event->next = NULL;
+ atsc_time(event->start_time, &event->start);
+ event->source_id = eit->header.id;
+
+ size = event->title_length - 1;
+ if (p + size > endbuf) {
+ dvb_logerr("%s: short read %zd/%zd bytes", __func__,
+ size, endbuf - p);
+ return;
+ }
+ /* TODO: parse title */
+ p += size;
+
+ if(!*head)
+ *head = event;
+ if(last)
+ last->next = event;
+
+ /* get the descriptors for each program */
+ size = sizeof(union atsc_table_eit_desc_length);
+ if (p + size > endbuf) {
+ dvb_logerr("%s: short read %zd/%zd bytes", __func__,
+ size, endbuf - p);
+ return;
+ }
+ memcpy(&dl, p, size);
+ p += size;
+ bswap16(dl.bitfield);
+
+ size = dl.desc_length;
+ if (p + size > endbuf) {
+ dvb_logerr("%s: short read %zd/%zd bytes", __func__,
+ size, endbuf - p);
+ return;
+ }
+ dvb_parse_descriptors(parms, p, size, &event->descriptor);
+
+ p += size;
+ last = event;
+ }
+}
+
+void atsc_table_eit_free(struct atsc_table_eit *eit)
+{
+ struct atsc_table_eit_event *event = eit->event;
+
+ while (event) {
+ struct atsc_table_eit_event *tmp = event;
+
+ dvb_free_descriptors((struct dvb_desc **) &event->descriptor);
+ event = event->next;
+ free(tmp);
+ }
+ free(eit);
+}
+
+void atsc_table_eit_print(struct dvb_v5_fe_parms *parms, struct atsc_table_eit *eit)
+{
+ dvb_log("EIT");
+ atsc_table_header_print(parms, &eit->header);
+ const struct atsc_table_eit_event *event = eit->event;
+ uint16_t events = 0;
+
+ while (event) {
+ char start[255];
+
+ strftime(start, sizeof(start), "%F %T", &event->start);
+ dvb_log("|- event %7d", event->event_id);
+ dvb_log("| Source %d", event->source_id);
+ dvb_log("| Starttime %d", event->start_time);
+ dvb_log("| Start %s UTC", start);
+ dvb_log("| Duration %dh %dm %ds", event->duration / 3600, (event->duration % 3600) / 60, event->duration % 60);
+ dvb_log("| ETM %d", event->etm);
+ dvb_log("| title length %d", event->title_length);
+ dvb_print_descriptors(parms, event->descriptor);
+ event = event->next;
+ events++;
+ }
+ dvb_log("|_ %d events", events);
+}
+
+void atsc_time(const uint32_t start_time, struct tm *tm)
+{
+ tm->tm_sec = 0;
+ tm->tm_min = 0;
+ tm->tm_hour = 0;
+ tm->tm_mday = 6;
+ tm->tm_mon = 0;
+ tm->tm_year = 80;
+ tm->tm_isdst = -1;
+ tm->tm_wday = 0;
+ tm->tm_yday = 0;
+ mktime(tm);
+ tm->tm_sec += start_time;
+ mktime(tm);
+}
+
+

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