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/* -*- C++ -*- */
/*
* Copyright 2008 Steve Glass
*
* This file is part of OP25.
*
* OP25 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.
*
* OP25 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 OP25; see the file COPYING. If not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Boston, MA
* 02110-1301, USA.
*/
#include <abstract_data_unit.h>
#include <algorithm>
#include <cstring>
#include <functional>
#include <iomanip>
#include <iostream>
#include <stdexcept>
#include <sstream>
#include <utility>
using namespace std;
abstract_data_unit::~abstract_data_unit()
{
}
void
abstract_data_unit::correct_errors()
{
if(is_complete()) {
do_correct_errors(d_frame_body);
} else {
ostringstream msg;
msg << "cannot correct errors - frame is not complete" << endl;
msg << "(size now: " << frame_size() << ", expected size: " << frame_size_max() << ")" << endl;
msg << "func: " << __PRETTY_FUNCTION__ << endl;
msg << "file: " << __FILE__ << endl;
msg << "line: " << __LINE__ << endl;
throw logic_error(msg.str());
}
}
void
abstract_data_unit::decode_audio(imbe_decoder& imbe)
{
if(is_complete()) {
do_decode_audio(d_frame_body, imbe);
} else {
ostringstream msg;
msg << "cannot decode audio - frame is not complete" << endl;
msg << "(size now: " << frame_size() << ", expected size: " << frame_size_max() << ")" << endl;
msg << "func: " << __PRETTY_FUNCTION__ << endl;
msg << "file: " << __FILE__ << endl;
msg << "line: " << __LINE__ << endl;
throw logic_error(msg.str());
}
}
size_t
abstract_data_unit::decode_frame(size_t msg_sz, uint8_t *msg)
{
return decode_frame(d_frame_body, msg_sz, msg);
}
size_t
abstract_data_unit::decode_frame(const_bit_vector& frame_body, size_t msg_sz, uint8_t *msg)
{
size_t n = 0;
if(is_complete()) {
if(size() <= msg_sz) {
n = extract(frame_body, 0, static_cast<int>(frame_body.size()), msg);
} else {
ostringstream msg;
msg << "cannot decode frame body ";
msg << "(msg size: " << msg_sz << ", actual size: " << size() << ")" << endl;
msg << "func: " << __PRETTY_FUNCTION__ << endl;
msg << "file: " << __FILE__ << endl;
msg << "line: " << __LINE__ << endl;
throw length_error(msg.str());
}
} else {
ostringstream msg;
msg << "cannot decode frame - frame is not complete" << endl;
msg << "(size now: " << frame_size() << ", expected size: " << frame_size_max() << ")" << endl;
msg << "func: " << __PRETTY_FUNCTION__ << endl;
msg << "file: " << __FILE__ << endl;
msg << "line: " << __LINE__ << endl;
throw logic_error(msg.str());
}
return n;
}
void
abstract_data_unit::extend(dibit d)
{
if(frame_size() < frame_size_max()) {
d_frame_body.push_back(d & 0x2);
d_frame_body.push_back(d & 0x1);
} else {
ostringstream msg;
msg << "cannot extend frame " << endl;
msg << "(size now: " << frame_size() << ", expected size: " << frame_size_max() << ")" << endl;
msg << "func: " << __PRETTY_FUNCTION__ << endl;
msg << "file: " << __FILE__ << endl;
msg << "line: " << __LINE__ << endl;
throw length_error(msg.str());
}
}
bool
abstract_data_unit::is_complete() const
{
return frame_size() >= frame_size_max();
}
uint16_t
abstract_data_unit::size() const
{
return (7 + frame_size_max()) >> 3;
}
std::string
abstract_data_unit::snapshot() const
{
string empty;
return empty;
}
void
abstract_data_unit::dump(ostream& os) const
{
uint32_t nbits = d_frame_body.size();
os << setw(4) << nbits << " ";
for(size_t i = 48; i < nbits; ++i) {
os << (d_frame_body[i] ? "#" : "-");
}
os << endl;
}
abstract_data_unit::abstract_data_unit(const_bit_queue& frame_body) :
d_frame_body(frame_body.size())
{
copy(frame_body.begin(), frame_body.end(), d_frame_body.begin());
}
void
abstract_data_unit::do_correct_errors(bit_vector& frame_body)
{
}
void
abstract_data_unit::do_decode_audio(const_bit_vector& frame_body, imbe_decoder& imbe)
{
}
const_bit_vector&
abstract_data_unit::frame_body() const
{
return d_frame_body;
}
uint16_t
abstract_data_unit::frame_size() const
{
return d_frame_body.size();
}
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