+shared_ptr<UserDevice> Context::create_user_device(
+ string vendor, string model, string version)
+{
+ return shared_ptr<UserDevice>(
+ new UserDevice(vendor, model, version), UserDevice::Deleter());
+}
+
+shared_ptr<Packet> Context::create_header_packet(Glib::TimeVal start_time)
+{
+ auto header = g_new(struct sr_datafeed_header, 1);
+ header->feed_version = 1;
+ header->starttime.tv_sec = start_time.tv_sec;
+ header->starttime.tv_usec = start_time.tv_usec;
+ auto packet = g_new(struct sr_datafeed_packet, 1);
+ packet->type = SR_DF_HEADER;
+ packet->payload = header;
+ return shared_ptr<Packet>(new Packet(nullptr, packet), Packet::Deleter());
+}
+
+shared_ptr<Packet> Context::create_meta_packet(
+ map<const ConfigKey *, Glib::VariantBase> config)
+{
+ auto meta = g_new0(struct sr_datafeed_meta, 1);
+ for (auto input : config)
+ {
+ auto key = input.first;
+ auto value = input.second;
+ auto output = g_new(struct sr_config, 1);
+ output->key = key->id();
+ output->data = value.gobj();
+ g_variant_ref(output->data);
+ meta->config = g_slist_append(meta->config, output);
+ }
+ auto packet = g_new(struct sr_datafeed_packet, 1);
+ packet->type = SR_DF_META;
+ packet->payload = meta;
+ return shared_ptr<Packet>(new Packet(nullptr, packet), Packet::Deleter());
+}
+
+shared_ptr<Packet> Context::create_logic_packet(
+ void *data_pointer, size_t data_length, unsigned int unit_size)
+{
+ auto logic = g_new(struct sr_datafeed_logic, 1);
+ logic->length = data_length;
+ logic->unitsize = unit_size;
+ logic->data = data_pointer;
+ auto packet = g_new(struct sr_datafeed_packet, 1);
+ packet->type = SR_DF_LOGIC;
+ packet->payload = logic;
+ return shared_ptr<Packet>(new Packet(nullptr, packet), Packet::Deleter());
+}
+
+shared_ptr<Packet> Context::create_analog_packet(
+ vector<shared_ptr<Channel> > channels,
+ float *data_pointer, unsigned int num_samples, const Quantity *mq,
+ const Unit *unit, vector<const QuantityFlag *> mqflags)
+{
+ auto analog = g_new0(struct sr_datafeed_analog, 1);
+ for (auto channel : channels)
+ analog->channels = g_slist_append(analog->channels, channel->_structure);
+ analog->num_samples = num_samples;
+ analog->mq = mq->id();
+ analog->unit = unit->id();
+ analog->mqflags = QuantityFlag::mask_from_flags(mqflags);
+ analog->data = data_pointer;
+ auto packet = g_new(struct sr_datafeed_packet, 1);
+ packet->type = SR_DF_ANALOG;
+ packet->payload = analog;
+ return shared_ptr<Packet>(new Packet(nullptr, packet), Packet::Deleter());
+}
+