Added C++ version of fn_time
This commit is contained in:
parent
29ec39b3bd
commit
34ce7a02f0
|
@ -34,5 +34,6 @@ install(FILES
|
||||||
message_printer.h
|
message_printer.h
|
||||||
tmsi_dumper.h
|
tmsi_dumper.h
|
||||||
msg_to_tag.h
|
msg_to_tag.h
|
||||||
controlled_fractional_resampler_cc.h DESTINATION include/grgsm/misc_utils
|
controlled_fractional_resampler_cc.h
|
||||||
|
fn_time.h DESTINATION include/grgsm/misc_utils
|
||||||
)
|
)
|
||||||
|
|
|
@ -0,0 +1,51 @@
|
||||||
|
/* -*- c++ -*- */
|
||||||
|
/* @file
|
||||||
|
* @author Piotr Krysik <ptrkrysik@gmail.com>
|
||||||
|
* @section LICENSE
|
||||||
|
*
|
||||||
|
* Gr-gsm is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation; either version 3, or (at your option)
|
||||||
|
* any later version.
|
||||||
|
*
|
||||||
|
* Gr-gsm 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 General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with gr-gsm; see the file COPYING. If not, write to
|
||||||
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
||||||
|
* Boston, MA 02110-1301, USA.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
|
||||||
|
#ifndef INCLUDED_GRGSM_FN_TIME_H
|
||||||
|
#define INCLUDED_GRGSM_FN_TIME_H
|
||||||
|
|
||||||
|
#include <stdint.h>
|
||||||
|
#include <uhd/types/time_spec.hpp>
|
||||||
|
|
||||||
|
namespace gr {
|
||||||
|
namespace gsm {
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Computes difference between reference frame number
|
||||||
|
* and a second frame number.
|
||||||
|
* @param fn_ref reference frame number modulo GSM_HYPER_FRAME
|
||||||
|
* @param fn second frame number modulo GSM_HYPER_FRAME
|
||||||
|
* @param time_ref precise timestamp of the first sample in the fn_ref
|
||||||
|
* @param time_hint coarse time for fn that is used as a hint to avoid
|
||||||
|
* ambiguities caused by modulo operation applied to
|
||||||
|
* frame numbers
|
||||||
|
* @return difference between fn_ref and fn
|
||||||
|
*/
|
||||||
|
uhd::time_spec_t fn_time_delta(uint32_t fn_ref, uhd::time_spec_t time_ref, uint32_t fn_x,
|
||||||
|
uhd::time_spec_t time_hint, uint32_t ts_num, uint32_t ts_ref);
|
||||||
|
|
||||||
|
} // namespace grgsm
|
||||||
|
} // namespace gr
|
||||||
|
|
||||||
|
#endif /* INCLUDED_GRGSM_FN_TIME_H */
|
||||||
|
|
|
@ -32,5 +32,6 @@ add_sources(
|
||||||
message_printer_impl.cc
|
message_printer_impl.cc
|
||||||
msg_to_tag_impl.cc
|
msg_to_tag_impl.cc
|
||||||
tmsi_dumper_impl.cc
|
tmsi_dumper_impl.cc
|
||||||
|
fn_time.cc
|
||||||
)
|
)
|
||||||
|
|
||||||
|
|
|
@ -0,0 +1,105 @@
|
||||||
|
/* -*- c++ -*- */
|
||||||
|
/* @file
|
||||||
|
* @author Piotr Krysik <ptrkrysik@gmail.com>
|
||||||
|
* @author Vadim Yanitskiy <axilirator@gmail.com>
|
||||||
|
* @section LICENSE
|
||||||
|
*
|
||||||
|
* Gr-gsm is free software; you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation; either version 3, or (at your option)
|
||||||
|
* any later version.
|
||||||
|
*
|
||||||
|
* Gr-gsm 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 General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with gr-gsm; see the file COPYING. If not, write to
|
||||||
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
||||||
|
* Boston, MA 02110-1301, USA.
|
||||||
|
*
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <grgsm/misc_utils/fn_time.h>
|
||||||
|
#include <math.h>
|
||||||
|
#include <uhd/types/time_spec.hpp>
|
||||||
|
|
||||||
|
#define GSM_HYPER_FRAME 26 * 51 * 2048
|
||||||
|
#define GSM_SYM_RATE 13.0e6 / 48.0
|
||||||
|
|
||||||
|
#define GSM_TS_PERIOD 156.25 / GSM_SYM_RATE
|
||||||
|
#define GSM_FN_PERIOD 8 * GSM_TS_PERIOD
|
||||||
|
|
||||||
|
namespace gr {
|
||||||
|
namespace gsm {
|
||||||
|
using namespace uhd;
|
||||||
|
/**
|
||||||
|
* Computes difference between two frame numbers modulo
|
||||||
|
* GSM_HYPER_FRAME / 2. The result is correct if difference
|
||||||
|
* between the frame numbers is not bigger than GSM_HYPER_FRAME / 2.
|
||||||
|
* @param fn1 first frame number
|
||||||
|
* @param fn2 second frame number
|
||||||
|
* @return computed difference
|
||||||
|
*/
|
||||||
|
static uint32_t fnmod_delta(uint32_t fn1, uint32_t fn2)
|
||||||
|
{
|
||||||
|
uint32_t delta, h2;
|
||||||
|
|
||||||
|
delta = (fn1 % GSM_HYPER_FRAME) - (fn2 % GSM_HYPER_FRAME);
|
||||||
|
h2 = GSM_HYPER_FRAME / 2;
|
||||||
|
|
||||||
|
if (delta >= h2)
|
||||||
|
delta -= GSM_HYPER_FRAME;
|
||||||
|
else
|
||||||
|
delta += GSM_HYPER_FRAME;
|
||||||
|
|
||||||
|
return delta;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int fn_time_diff_delta(uint32_t fn, uint32_t fn_ref,
|
||||||
|
time_spec_t time_diff_hint)
|
||||||
|
{
|
||||||
|
int frames_diff, fn_delta;
|
||||||
|
|
||||||
|
frames_diff = int(round(time_diff_hint.get_real_secs() / GSM_FN_PERIOD));
|
||||||
|
fn_delta = fnmod_delta(fn, fn_ref + frames_diff) + frames_diff;
|
||||||
|
|
||||||
|
return fn_delta;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Computes difference between reference frame number
|
||||||
|
* and a second frame number.
|
||||||
|
* @param fn_ref reference frame number modulo GSM_HYPER_FRAME
|
||||||
|
* @param fn second frame number modulo GSM_HYPER_FRAME
|
||||||
|
* @param time_ref precise timestamp of the first sample in the fn_ref
|
||||||
|
* @param time_hint coarse time for fn that is used as a hint to avoid
|
||||||
|
* ambiguities caused by modulo operation applied to
|
||||||
|
* frame numbers
|
||||||
|
* @return difference between fn_ref and fn
|
||||||
|
*/
|
||||||
|
time_spec_t fn_time_delta(uint32_t fn_ref, time_spec_t time_ref, uint32_t fn_x,
|
||||||
|
time_spec_t time_hint, uint32_t ts_num, uint32_t ts_ref)
|
||||||
|
{
|
||||||
|
time_spec_t time_diff_hint = time_hint - time_ref;
|
||||||
|
uint32_t fn_delta = fn_time_diff_delta(fn_x,fn_ref, time_diff_hint);
|
||||||
|
time_spec_t time_x_precise = fn_delta * GSM_FN_PERIOD
|
||||||
|
+ time_ref + (ts_num - ts_ref) * GSM_TS_PERIOD;
|
||||||
|
|
||||||
|
return time_x_precise;
|
||||||
|
}
|
||||||
|
/*
|
||||||
|
def fn_time_delta(fn_ref, time_ref, fn_x, time_hint=None, ts_num=0, ts_ref=0):
|
||||||
|
if time_hint is None:
|
||||||
|
time_hint = time_ref
|
||||||
|
|
||||||
|
time_diff_hint = time_hint-time_ref
|
||||||
|
fn_delta = fn_time_diff_delta(fn_x,fn_ref, time_diff_hint)
|
||||||
|
time_x_precise = fn_delta*__frame_period+time_ref+(ts_num-ts_ref)*__ts_period
|
||||||
|
|
||||||
|
return fn_delta, time_x_precise
|
||||||
|
*/
|
||||||
|
} /* namespace gsm */
|
||||||
|
} /* namespace gr */
|
||||||
|
|
|
@ -65,6 +65,7 @@
|
||||||
#include "grgsm/misc_utils/msg_to_tag.h"
|
#include "grgsm/misc_utils/msg_to_tag.h"
|
||||||
#include "grgsm/misc_utils/controlled_fractional_resampler_cc.h"
|
#include "grgsm/misc_utils/controlled_fractional_resampler_cc.h"
|
||||||
#include "grgsm/trx_interface/trx.h"
|
#include "grgsm/trx_interface/trx.h"
|
||||||
|
#include "grgsm/misc_utils/fn_time.h"
|
||||||
%}
|
%}
|
||||||
|
|
||||||
%include "constants.i"
|
%include "constants.i"
|
||||||
|
@ -146,3 +147,4 @@ GR_SWIG_BLOCK_MAGIC2(gsm, message_source);
|
||||||
GR_SWIG_BLOCK_MAGIC2(gsm, message_sink);
|
GR_SWIG_BLOCK_MAGIC2(gsm, message_sink);
|
||||||
%include "grgsm/trx_interface/trx.h"
|
%include "grgsm/trx_interface/trx.h"
|
||||||
GR_SWIG_BLOCK_MAGIC2(grgsm, trx);
|
GR_SWIG_BLOCK_MAGIC2(grgsm, trx);
|
||||||
|
%include "grgsm/misc_utils/fn_time.h"
|
||||||
|
|
Loading…
Reference in New Issue