diff options
Diffstat (limited to 'lib/libdvben50221/en50221_app_epg.c')
| -rw-r--r-- | lib/libdvben50221/en50221_app_epg.c | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/lib/libdvben50221/en50221_app_epg.c b/lib/libdvben50221/en50221_app_epg.c new file mode 100644 index 0000000..87b4743 --- /dev/null +++ b/lib/libdvben50221/en50221_app_epg.c @@ -0,0 +1,167 @@ +/* + 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_epg.h" +#include "en50221_app_tags.h" +#include "asn_1.h" + +struct en50221_app_epg { + struct en50221_app_send_functions *funcs; + + en50221_app_epg_reply_callback callback; + void *callback_arg; + + pthread_mutex_t lock; +}; + +static int en50221_app_epg_parse_reply(struct en50221_app_epg *private, + uint8_t slot_id, + uint16_t session_number, + uint8_t * data, + uint32_t data_length); + + + +struct en50221_app_epg *en50221_app_epg_create(struct en50221_app_send_functions *funcs) +{ + struct en50221_app_epg *epg = NULL; + + // create structure and set it up + epg = malloc(sizeof(struct en50221_app_epg)); + if (epg == NULL) { + return NULL; + } + epg->funcs = funcs; + epg->callback = NULL; + + pthread_mutex_init(&epg->lock, NULL); + + // done + return epg; +} + +void en50221_app_epg_destroy(struct en50221_app_epg *epg) +{ + pthread_mutex_destroy(&epg->lock); + free(epg); +} + +void en50221_app_epg_register_enquiry_callback(struct en50221_app_epg *epg, + en50221_app_epg_reply_callback callback, + void *arg) +{ + pthread_mutex_lock(&epg->lock); + epg->callback = callback; + epg->callback_arg = arg; + pthread_mutex_unlock(&epg->lock); +} + +int en50221_app_epg_enquire(struct en50221_app_epg *epg, + uint16_t session_number, + uint8_t command_id, + uint16_t network_id, + uint16_t original_network_id, + uint16_t transport_stream_id, + uint16_t service_id, uint16_t event_id) +{ + uint8_t data[15]; + + data[0] = (TAG_EPG_ENQUIRY >> 16) & 0xFF; + data[1] = (TAG_EPG_ENQUIRY >> 8) & 0xFF; + data[2] = TAG_EPG_ENQUIRY & 0xFF; + data[3] = 11; + data[4] = command_id; + data[5] = network_id >> 8; + data[6] = network_id; + data[7] = original_network_id >> 8; + data[8] = original_network_id; + data[9] = transport_stream_id >> 8; + data[10] = transport_stream_id; + data[11] = service_id >> 8; + data[12] = service_id; + data[13] = event_id >> 8; + data[14] = event_id; + return epg->funcs->send_data(epg->funcs->arg, session_number, data, 15); +} + +int en50221_app_epg_message(struct en50221_app_epg *epg, + uint8_t slot_id, + uint16_t session_number, + uint32_t resource_id, + uint8_t * data, uint32_t data_length) +{ + struct en50221_app_epg *private = (struct en50221_app_epg *) epg; + (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_EPG_REPLY: + return en50221_app_epg_parse_reply(private, 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_epg_parse_reply(struct en50221_app_epg *epg, + 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 event_status = data[1]; + + // tell the app + pthread_mutex_lock(&epg->lock); + en50221_app_epg_reply_callback cb = epg->callback; + void *cb_arg = epg->callback_arg; + pthread_mutex_unlock(&epg->lock); + if (cb) { + return cb(cb_arg, slot_id, session_number, event_status); + } + return 0; +} |