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167 lines
5.3 KiB
167 lines
5.3 KiB
/*
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en50221 encoder An implementation for libdvb
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an implementation for the en50221 transport layer
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Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)
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Copyright (C) 2005 Julian Scheel (julian at jusst dot de)
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Copyright (C) 2006 Andrew de Quincey (adq_dvb@lidskialf.net)
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include <libdvbmisc/dvbmisc.h>
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#include <pthread.h>
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#include <libucsi/dvb/types.h>
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#include "en50221_app_epg.h"
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#include "en50221_app_tags.h"
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#include "asn_1.h"
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struct en50221_app_epg_private {
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struct en50221_app_send_functions *funcs;
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en50221_app_epg_reply_callback callback;
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void *callback_arg;
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pthread_mutex_t lock;
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};
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static int en50221_app_epg_parse_reply(struct en50221_app_epg_private *private,
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uint8_t slot_id, uint16_t session_number,
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uint8_t *data, uint32_t data_length);
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en50221_app_epg en50221_app_epg_create(struct en50221_app_send_functions *funcs)
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{
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struct en50221_app_epg_private *private = NULL;
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// create structure and set it up
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private = malloc(sizeof(struct en50221_app_epg_private));
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if (private == NULL) {
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return NULL;
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}
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private->funcs = funcs;
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private->callback = NULL;
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pthread_mutex_init(&private->lock, NULL);
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// done
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return private;
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}
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void en50221_app_epg_destroy(en50221_app_epg epg)
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{
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struct en50221_app_epg_private *private = (struct en50221_app_epg_private *) epg;
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pthread_mutex_destroy(&private->lock);
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free(private);
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}
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void en50221_app_epg_register_enquiry_callback(en50221_app_epg epg,
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en50221_app_epg_reply_callback callback, void *arg)
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{
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struct en50221_app_epg_private *private = (struct en50221_app_epg_private *) epg;
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pthread_mutex_lock(&private->lock);
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private->callback = callback;
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private->callback_arg = arg;
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pthread_mutex_unlock(&private->lock);
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}
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int en50221_app_epg_enquire(en50221_app_epg epg,
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uint16_t session_number,
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uint8_t command_id,
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uint16_t network_id,
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uint16_t original_network_id,
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uint16_t transport_stream_id,
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uint16_t service_id,
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uint16_t event_id)
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{
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struct en50221_app_epg_private *private = (struct en50221_app_epg_private *) epg;
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uint8_t data[15];
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data[0] = (TAG_EPG_ENQUIRY >> 16) & 0xFF;
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data[1] = (TAG_EPG_ENQUIRY >> 8) & 0xFF;
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data[2] = TAG_EPG_ENQUIRY & 0xFF;
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data[3] = 11;
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data[4] = command_id;
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data[5] = network_id >> 8;
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data[6] = network_id;
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data[7] = original_network_id >> 8;
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data[8] = original_network_id;
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data[9] = transport_stream_id >> 8;
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data[10] = transport_stream_id;
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data[11] = service_id >> 8;
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data[12] = service_id;
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data[13] = event_id >> 8;
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data[14] = event_id;
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return private->funcs->send_data(private->funcs->arg, session_number, data, 15);
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}
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int en50221_app_epg_message(en50221_app_epg epg,
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uint8_t slot_id,
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uint16_t session_number,
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uint32_t resource_id,
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uint8_t *data, uint32_t data_length)
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{
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struct en50221_app_epg_private *private = (struct en50221_app_epg_private *) epg;
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(void) resource_id;
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// get the tag
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if (data_length < 3) {
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print(LOG_LEVEL, ERROR, 1, "Received short data\n");
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return -1;
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}
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uint32_t tag = (data[0] << 16) | (data[1] << 8) | data[2];
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switch(tag)
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{
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case TAG_EPG_REPLY:
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return en50221_app_epg_parse_reply(private, slot_id, session_number, data+3, data_length-3);
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}
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print(LOG_LEVEL, ERROR, 1, "Received unexpected tag %x\n", tag);
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return -1;
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}
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static int en50221_app_epg_parse_reply(struct en50221_app_epg_private *private,
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uint8_t slot_id, uint16_t session_number,
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uint8_t *data, uint32_t data_length)
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{
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// validate data
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if (data_length != 2) {
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print(LOG_LEVEL, ERROR, 1, "Received short data\n");
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return -1;
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}
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if (data[0] != 1) {
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print(LOG_LEVEL, ERROR, 1, "Received short data\n");
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return -1;
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}
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uint8_t event_status = data[1];
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// tell the app
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pthread_mutex_lock(&private->lock);
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en50221_app_epg_reply_callback cb = private->callback;
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void *cb_arg = private->callback_arg;
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pthread_mutex_unlock(&private->lock);
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if (cb) {
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return cb(cb_arg, slot_id, session_number, event_status);
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}
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return 0;
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}
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