aboutsummaryrefslogtreecommitdiffstats
path: root/lib/demapping
diff options
context:
space:
mode:
authorPiotr Krysik <ptrkrysik@gmail.com>2016-05-22 14:07:16 +0200
committerPiotr Krysik <ptrkrysik@gmail.com>2016-05-22 14:07:16 +0200
commit27085acf2ee447ffcfad57ea48f558e294b9a287 (patch)
tree57a16255b888fc7f28d1bfea2aed3b0da57032ca /lib/demapping
parent19cba4762a44a8431d26a03af1a0c7236554ca31 (diff)
Corrected setting of header fields in the universal demapper
Diffstat (limited to 'lib/demapping')
-rw-r--r--lib/demapping/universal_ctrl_chans_demapper_impl.cc37
1 files changed, 21 insertions, 16 deletions
diff --git a/lib/demapping/universal_ctrl_chans_demapper_impl.cc b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
index 6754e57..dc1670d 100644
--- a/lib/demapping/universal_ctrl_chans_demapper_impl.cc
+++ b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
@@ -73,7 +73,7 @@ namespace gr {
std::copy(uplink_starts_fn_mod51.begin(), uplink_starts_fn_mod51.end(), d_uplink_starts_fn_mod51.begin());
std::copy(uplink_channel_types.begin(), uplink_channel_types.end(), d_uplink_channel_types.begin());
std::copy(uplink_subslots.begin(), uplink_subslots.end(), d_uplink_subslots.begin());
-
+
message_port_register_in(pmt::mp("bursts"));
set_msg_handler(pmt::mp("bursts"), boost::bind(&universal_ctrl_chans_demapper_impl::filter_ctrl_chans, this, _1));
message_port_register_out(pmt::mp("bursts"));
@@ -86,10 +86,11 @@ namespace gr {
{
}
- void universal_ctrl_chans_demapper_impl::filter_ctrl_chans(pmt::pmt_t msg)
+ void universal_ctrl_chans_demapper_impl::filter_ctrl_chans(pmt::pmt_t burst_in)
{
- pmt::pmt_t header_plus_burst = pmt::cdr(msg);
- gsmtap_hdr * header = (gsmtap_hdr *)pmt::blob_data(header_plus_burst);
+ pmt::pmt_t header_plus_burst = pmt::cdr(burst_in);
+ int8_t * burst_in_int8 = (int8_t *)pmt::blob_data(header_plus_burst);
+ gsmtap_hdr * header = (gsmtap_hdr *)(burst_in_int8);
if(header->timeslot==d_timeslot_nr)
{
@@ -101,14 +102,15 @@ namespace gr {
uint32_t frame_nr = be32toh(header->frame_number); //get frame number
uint32_t fn_mod51 = frame_nr % 51; //frame number modulo 51
+ uint32_t fn_mod102 = frame_nr % 102; //frame number modulo 102
- //crate new message
- int8_t new_msg[sizeof(gsmtap_hdr)+BURST_SIZE];
- gsmtap_hdr * new_hdr = (gsmtap_hdr*)new_msg;
- memcpy(new_msg, header, sizeof(gsmtap_hdr)+BURST_SIZE);
- pmt::pmt_t msg_binary_blob = pmt::make_blob(new_msg,sizeof(gsmtap_hdr)+BURST_SIZE);
- pmt::pmt_t msg_out = pmt::cons(pmt::PMT_NIL, msg_binary_blob);
-
+ //create new burst
+ int8_t burst_tmp[sizeof(gsmtap_hdr)+BURST_SIZE];
+ memcpy(burst_tmp, burst_in_int8, sizeof(gsmtap_hdr)+BURST_SIZE);
+ pmt::pmt_t msg_binary_blob = pmt::make_blob(burst_tmp,sizeof(gsmtap_hdr)+BURST_SIZE);
+ pmt::pmt_t burst_out = pmt::cons(pmt::PMT_NIL, msg_binary_blob);
+ gsmtap_hdr * new_header = (gsmtap_hdr *)pmt::blob_data(msg_binary_blob);
+
//get information if burst is from uplink or downlink
bool uplink_burst = (be16toh(header->arfcn) & 0x4000) ? true : false;
@@ -129,19 +131,22 @@ namespace gr {
uint32_t fn51_start = starts_fn_mod51[fn_mod51];
uint32_t fn51_stop = fn51_start + 3;
- uint32_t ch_type = channel_types[fn_mod51];
+ //set type
+ new_header->type = GSMTAP_TYPE_UM;
+ //set type of the channel
+ uint32_t ch_type = channel_types[fn_mod51];
if(ch_type != 0)
{
- new_hdr->sub_type = ch_type;
+ new_header->sub_type = ch_type;
}
- new_hdr->sub_slot = subslots[fn_mod51 + (51 * (frame_nr % 2))];
+ new_header->sub_slot = subslots[fn_mod51 + (51 * (frame_nr % 2))];
if(fn_mod51>=fn51_start && fn_mod51<=fn51_stop)
{
uint32_t ii = fn_mod51 - fn51_start;
frame_numbers[ii] = frame_nr;
- bursts[ii] = msg_out;
+ bursts[ii] = burst_out;
}
if(fn_mod51==fn51_stop)
@@ -163,7 +168,7 @@ namespace gr {
{
message_port_pub(pmt::mp("bursts"), bursts[jj]);
}
- }
+ }
}
}
}