/* en50221 encoder An implementation for libdvb an implementation for the en50221 transport layer Copyright (C) 2004, 2005 Manu Abraham 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 #include #include #include "en50221_app_dvb.h" #include "en50221_app_tags.h" #include "asn_1.h" struct en50221_app_dvb { struct en50221_app_send_functions *funcs; en50221_app_dvb_tune_callback tune_callback; void *tune_callback_arg; en50221_app_dvb_replace_callback replace_callback; void *replace_callback_arg; en50221_app_dvb_clear_replace_callback clear_replace_callback; void *clear_replace_callback_arg; pthread_mutex_t lock; }; static int en50221_app_dvb_parse_tune(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length); static int en50221_app_dvb_parse_replace(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length); static int en50221_app_dvb_parse_clear_replace(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length); struct en50221_app_dvb *en50221_app_dvb_create(struct en50221_app_send_functions *funcs) { struct en50221_app_dvb *dvb = NULL; // create structure and set it up dvb = malloc(sizeof(struct en50221_app_dvb)); if (dvb == NULL) { return NULL; } dvb->funcs = funcs; dvb->tune_callback = NULL; dvb->replace_callback = NULL; dvb->clear_replace_callback = NULL; pthread_mutex_init(&dvb->lock, NULL); // done return dvb; } void en50221_app_dvb_destroy(struct en50221_app_dvb *dvb) { pthread_mutex_destroy(&dvb->lock); free(dvb); } void en50221_app_dvb_register_tune_callback(struct en50221_app_dvb *dvb, en50221_app_dvb_tune_callback callback, void *arg) { pthread_mutex_lock(&dvb->lock); dvb->tune_callback = callback; dvb->tune_callback_arg = arg; pthread_mutex_unlock(&dvb->lock); } void en50221_app_dvb_register_replace_callback(struct en50221_app_dvb *dvb, en50221_app_dvb_replace_callback callback, void *arg) { pthread_mutex_lock(&dvb->lock); dvb->replace_callback = callback; dvb->replace_callback_arg = arg; pthread_mutex_unlock(&dvb->lock); } void en50221_app_dvb_register_clear_replace_callback(struct en50221_app_dvb *dvb, en50221_app_dvb_clear_replace_callback callback, void *arg) { pthread_mutex_lock(&dvb->lock); dvb->clear_replace_callback = callback; dvb->clear_replace_callback_arg = arg; pthread_mutex_unlock(&dvb->lock); } int en50221_app_dvb_ask_release(struct en50221_app_dvb *dvb, uint16_t session_number) { uint8_t data[4]; data[0] = (TAG_ASK_RELEASE >> 16) & 0xFF; data[1] = (TAG_ASK_RELEASE >> 8) & 0xFF; data[2] = TAG_ASK_RELEASE & 0xFF; data[3] = 0; return dvb->funcs->send_data(dvb->funcs->arg, session_number, data, 4); } int en50221_app_dvb_message(struct en50221_app_dvb *dvb, 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_TUNE: return en50221_app_dvb_parse_tune(dvb, slot_id, session_number, data + 3, data_length - 3); case TAG_REPLACE: return en50221_app_dvb_parse_replace(dvb, slot_id, session_number, data + 3, data_length - 3); case TAG_CLEAR_REPLACE: return en50221_app_dvb_parse_clear_replace(dvb, 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_dvb_parse_tune(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length) { // validate data if (data_length < 9) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } if (data[0] != 8) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } uint8_t *tune_data = data + 1; // parse it uint16_t network_id = (tune_data[0] << 8) | tune_data[1]; uint16_t original_network_id = (tune_data[2] << 8) | tune_data[3]; uint16_t transport_stream_id = (tune_data[4] << 8) | tune_data[5]; uint16_t service_id = (tune_data[6] << 8) | tune_data[7]; // tell the app pthread_mutex_lock(&dvb->lock); en50221_app_dvb_tune_callback cb = dvb->tune_callback; void *cb_arg = dvb->tune_callback_arg; pthread_mutex_unlock(&dvb->lock); if (cb) { return cb(cb_arg, slot_id, session_number, network_id, original_network_id, transport_stream_id, service_id); } return 0; } static int en50221_app_dvb_parse_replace(struct en50221_app_dvb *dvb, uint8_t slot_id, uint16_t session_number, uint8_t * data, uint32_t data_length) { // validate data if (data_length < 6) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } if (data[0] != 5) { print(LOG_LEVEL, ERROR, 1, "Received short data\n"); return -1; } uint8_t *replace_data = data + 1; // parse it uint8_t replacement_ref = replace_data[0]; uint16_t replace_pid = ((replace_data[1] & 0x1f) << 8) | replace_data[2]; uint16_t replacement_pid = ((replace_data[3] & 0x1f) << 8) | replace_data[4]; // tell the app pthread_mutex_lock(&dvb->lock); en50221_app_dvb_replace_callback cb = dvb->replace_callback; void *cb_arg = dvb->replace_callback_arg; pthread_mutex_unlock(&dvb->lock); if (cb) { return cb(cb_arg, slot_id, session_number, replacement_ref, replace_pid, replacement_pid); } return 0; } static int en50221_app_dvb_parse_clear_replace(struct en50221_app_dvb *dvb, 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 *replace_data = data + 1; // parse it uint8_t replacement_ref = replace_data[0]; // tell the app pthread_mutex_lock(&dvb->lock); en50221_app_dvb_clear_replace_callback cb = dvb->clear_replace_callback; void *cb_arg = dvb->clear_replace_callback_arg; pthread_mutex_unlock(&dvb->lock); if (cb) { return cb(cb_arg, slot_id, session_number, replacement_ref); } return 0; } /a> 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182