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-rw-r--r--lib/libdvben50221/en50221_app_dvb.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/lib/libdvben50221/en50221_app_dvb.c b/lib/libdvben50221/en50221_app_dvb.c
new file mode 100644
index 0000000..21b2bec
--- /dev/null
+++ b/lib/libdvben50221/en50221_app_dvb.c
@@ -0,0 +1,282 @@
+/*
+ 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 "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;
+}
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