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Diffstat (limited to '')
| -rw-r--r-- | lib/libdvben50221/en50221_app_datetime.c | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/lib/libdvben50221/en50221_app_datetime.c b/lib/libdvben50221/en50221_app_datetime.c new file mode 100644 index 0000000..6777003 --- /dev/null +++ b/lib/libdvben50221/en50221_app_datetime.c @@ -0,0 +1,173 @@ +/* + en50221 encoder An implementation for libdvb + an implementation for the en50221 transport layer + + Copyright (C) 2004, 2005 Manu Abraham <abraham.manu@gmail.com> + Copyright (C) 2005 Julian Scheel (julian at jusst dot de) + Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net) + + This library is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as + published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#include <string.h> +#include <libdvbmisc/dvbmisc.h> +#include <pthread.h> +#include <libucsi/dvb/types.h> +#include "en50221_app_datetime.h" +#include "en50221_app_tags.h" +#include "asn_1.h" + +struct en50221_app_datetime { + struct en50221_app_send_functions *funcs; + + en50221_app_datetime_enquiry_callback callback; + void *callback_arg; + + pthread_mutex_t lock; +}; + +static int en50221_app_datetime_parse_enquiry(struct en50221_app_datetime *datetime, + uint8_t slot_id, + uint16_t session_number, + uint8_t * data, + uint32_t data_length); + + + +struct en50221_app_datetime *en50221_app_datetime_create(struct en50221_app_send_functions *funcs) +{ + struct en50221_app_datetime *datetime = NULL; + + // create structure and set it up + datetime = malloc(sizeof(struct en50221_app_datetime)); + if (datetime == NULL) { + return NULL; + } + datetime->funcs = funcs; + datetime->callback = NULL; + + pthread_mutex_init(&datetime->lock, NULL); + + // done + return datetime; +} + +void en50221_app_datetime_destroy(struct en50221_app_datetime *datetime) +{ + pthread_mutex_destroy(&datetime->lock); + free(datetime); +} + +void en50221_app_datetime_register_enquiry_callback(struct en50221_app_datetime *datetime, + en50221_app_datetime_enquiry_callback callback, + void *arg) +{ + pthread_mutex_lock(&datetime->lock); + datetime->callback = callback; + datetime->callback_arg = arg; + pthread_mutex_unlock(&datetime->lock); +} + +int en50221_app_datetime_send(struct en50221_app_datetime *datetime, + uint16_t session_number, + time_t utc_time, int time_offset) +{ + uint8_t data[11]; + int data_length; + + data[0] = (TAG_DATE_TIME >> 16) & 0xFF; + data[1] = (TAG_DATE_TIME >> 8) & 0xFF; + data[2] = TAG_DATE_TIME & 0xFF; + if (time_offset != -1) { + data[3] = 7; + unixtime_to_dvbdate(utc_time, data + 4); + data[9] = time_offset >> 8; + data[10] = time_offset; + data_length = 11; + } else { + data[3] = 5; + unixtime_to_dvbdate(utc_time, data + 4); + data_length = 9; + } + return datetime->funcs->send_data(datetime->funcs->arg, + session_number, data, + data_length); +} + +int en50221_app_datetime_message(struct en50221_app_datetime *datetime, + uint8_t slot_id, + uint16_t session_number, + uint32_t resource_id, + uint8_t * data, uint32_t data_length) +{ + (void) resource_id; + + // get the tag + if (data_length < 3) { + print(LOG_LEVEL, ERROR, 1, "Received short data\n"); + return -1; + } + uint32_t tag = (data[0] << 16) | (data[1] << 8) | data[2]; + + switch (tag) { + case TAG_DATE_TIME_ENQUIRY: + return en50221_app_datetime_parse_enquiry(datetime, + slot_id, + session_number, + data + 3, + data_length - 3); + } + + print(LOG_LEVEL, ERROR, 1, "Received unexpected tag %x\n", tag); + return -1; +} + + + + + + + + + + +static int en50221_app_datetime_parse_enquiry(struct en50221_app_datetime *datetime, + uint8_t slot_id, + uint16_t session_number, + uint8_t * data, + uint32_t data_length) +{ + // validate data + if (data_length != 2) { + print(LOG_LEVEL, ERROR, 1, "Received short data\n"); + return -1; + } + if (data[0] != 1) { + print(LOG_LEVEL, ERROR, 1, "Received short data\n"); + return -1; + } + uint8_t response_interval = data[1]; + + // tell the app + pthread_mutex_lock(&datetime->lock); + en50221_app_datetime_enquiry_callback cb = datetime->callback; + void *cb_arg = datetime->callback_arg; + pthread_mutex_unlock(&datetime->lock); + if (cb) { + return cb(cb_arg, slot_id, session_number, + response_interval); + } + return 0; +} |