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@xxxxxxxxx> --- lib/include/descriptors/atsc_eit.h | 90 +++++++++++++++++++ lib/libdvbv5/Makefile.am | 4 +- lib/libdvbv5/descriptors.c | 1 + lib/libdvbv5/descriptors/atsc_eit.c | 170 ++++++++++++++++++++++++++++++++++++ 4 files changed, 264 insertions(+), 1 deletion(-) create mode 100644 lib/include/descriptors/atsc_eit.h create mode 100644 lib/libdvbv5/descriptors/atsc_eit.c diff --git a/lib/include/descriptors/atsc_eit.h b/lib/include/descriptors/atsc_eit.h new file mode 100644 index 0000000..3bc5df6 --- /dev/null +++ b/lib/include/descriptors/atsc_eit.h @@ -0,0 +1,90 @@ +/* + * Copyright (c) 2013 - Andre Roth <neolynx@xxxxxxxxx> + * + * 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 44f68d4..c6d2a42 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 7385027..aeace36 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 0000000..f8afc76 --- /dev/null +++ b/lib/libdvbv5/descriptors/atsc_eit.c @@ -0,0 +1,170 @@ +/* + * Copyright (c) 2013 - Andre Roth <neolynx@xxxxxxxxx> + * + * 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); +} + + -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
